BPTC cho nhà điều khiển hệ thông Than bằng Anh ngữ MS of concrete work for coal hanging control building

DOCUMENT SUBMISSION STATUS:

FOR CONSTRUCTION

1

05.11.2018

FOR CONSTRUCTION

P.Q.PHUC

T.Q.KHUONG

D.N.BICH

0

19.03.2018

FOR CONSTRUCTION

P.Q.PHUC

T.Q.KHUONG

D.N.BICH

A

23.11.2017

FOR APPROVAL

P.Q.PHUC

T.Q.KHUONG

REV

DATE

DESCRIPTION

PREPARED

CHECKED

N.D.VIET
APPROVED

PROJECT TITLE

SONG HAU 1 THERMAL POWER PLANT (2x600MW)
OWNER

OWNER’S CONSULTANT

VIETNAM OIL AND GAS GROUP
EPC CONTRACTOR

(PVN)

FICHTNER GmbH &

PV ENGINEERING

EPC CONTRACTOR’SCONSULTANT

VIETNAM MACHINERY
INSTALLATION
CORPORATION (LILAMA)

TOKYO ELECTRIC POWERSERVICES
COMPANY LIMITED - TEPSCO

CONTRACTOR

DATE

NAME

Prepared

05.11.2018

P.Q.PHUC

Checked.

05.11.2018

T.Q.KHUONG

Approved
.

05.11.2018

D.N.BICH

SIGN

DOCUMENT TITLE

Method Statement for
Concrete work of
COAL HANDLIN2G CONTROL
BUILDING

DOCUMENT NO. SH1-HNC-P0100-C-C14-PRO-0042B

Rev.

1


CONTENTS
1. PURPOSE...................................................................................................................... 4
2. SCOPE OF WORKS.....................................................................................................5
3. REFERENCE DOCUMENT........................................................................................5

3.1.

PROJECT DOCUMENT.......................................................................................................5

3.2.

DESIGN DRAWING...............................................................................................................5

3.3.

STANDARD AND CODE......................................................................................................6

4. DEFINITION................................................................................................................. 8
5. PERSONNEL AND EQUIPMENT MOBILIZATION PLAN...................................9
5.1.

PERSONNEL...........................................................................................................................9

5.1.1.

Organization Chart.........................................................................................................................9

5.1.2.

Manpower........................................................................................................................................9

5.2.

EQUIPMENT........................................................................................................................10

6. CONSTRUCTION METHOD....................................................................................10
6.1.

CONSTRUCTION SEQUENCE........................................................................................11

6.2.

PREPARATION....................................................................................................................12

6.3.

SURVEY AND SETTING OUT..........................................................................................12

6.3.1.

Benchmark....................................................................................................................................12

6.3.2.

Survey setting out..........................................................................................................................12

6.3.3.

Survey control...............................................................................................................................12

6.4.

FABRICATION AND INSTALLATION OF REBAR.....................................................13

6.4.1.

Material:........................................................................................................................................13

6.4.2.

Cutting and blending:...................................................................................................................13

6.4.3.

Installation:...................................................................................................................................13

6.4.4.

Inspection:.....................................................................................................................................14

6.5.

FORMWORK........................................................................................................................14

6.5.1.

Materials:......................................................................................................................................14

6.5.2.

Calculation of formwork..............................................................................................................14

6.5.3.

Typical formwork:........................................................................................................................14

6.5.4.

Fabrication:...................................................................................................................................15

6.5.5.

Installation:...................................................................................................................................15

6.5.6.

Requirement of formwork............................................................................................................15

6.5.7.

Inspection:.....................................................................................................................................15

6.6.

POURING CONCRETE......................................................................................................15
Page | 2


6.6.1.

Preparing before pouring concrete:.............................................................................................15

6.6.2.

Testing concrete:...........................................................................................................................16

6.6.3.

Pouring concrete:..........................................................................................................................16

6.7.

PROTECTION AND CURING OF CONCRETE...........................................................16

6.7.1.

Curing:...........................................................................................................................................16

6.7.2.

Protection:.....................................................................................................................................17

6.8.

REMOVAL FORMWORK..................................................................................................17

6.8.1.

Formwork Removal Time............................................................................................................17

6.8.2.

Sequence of removal formwork:..................................................................................................17

6.8.3.

Removal formwork notes:............................................................................................................18

6.9.

FINISHED SURFACE..........................................................................................................18

6.10. CONSTRUCTION JOINT AND EMBEDDED................................................................18
6.10.1.

Construction Joint........................................................................................................................18

6.10.2.

Chamfer.........................................................................................................................................19

6.10.3.

Embedded......................................................................................................................................19

7. CONSTRUCTION SCHEDULE................................................................................20
8. QA/QC.......................................................................................................................... 20
9. HSSE............................................................................................................................. 21
9.1. LEGAL PROCEDURES OF SOCIALIST REPUBLIC OF VIETNAM FOR
SAFETY AND HEALTH ARE BEING APPLIED.....................................................................21
9.2.

SAFETY CONTROL ORGANIZATION..........................................................................22

9.2.1.

Safety Control Organization........................................................................................................22

9.2.2.

Responsibilities..............................................................................................................................22

9.3.

HSSE MANAGEMENT PLAN...........................................................................................24

9.4. THE PREVENTIVE MEASURES TO ENSURE SAFETY DURING
CONSTRUCTION...........................................................................................................................25
9.4.1.

Before entering the work area:....................................................................................................25

9.4.2.

The safety requirements at work:................................................................................................25

9.5.

PERMIT TO WORK............................................................................................................25

10. APPENDIXES.............................................................................................................25
10.1. APPENDIX 1 (Calculation of Formwork)........................................................................25
10.2. APPENDIX 2 (Equipment and Manpower Manpower Mobilization Plan).................25
10.3. APPENDIX 3 (Risk Assessment)........................................................................................25
10.4. APPENDIX 4 (Job Safety and Environment Analysis)...................................................25

Page | 3


10.5. APPENDIX 5 (Shop Drawing)............................................................................................25
APPENDIX 1....................................................................................................................................26
(Calculation of Formwork).............................................................................................................26
APPENDIX 2....................................................................................................................................42
(Equipment and Manpower Manpower Mobilization Plan).....................................................42
APPENDIX 3....................................................................................................................................45
(Risk Assessment).............................................................................................................................45
APPENDIX 4....................................................................................................................................52
(Job Safety and Environment Analysis).......................................................................................52
APPENDIX 5....................................................................................................................................57
(Shop Drawing)................................................................................................................................57

Page | 4


1. PURPOSE
The purpose of this Method Statement is to provide a general explanation of the work
procedure to be carried out concrete work for Coal Handling Control Building of project
SONG HAU 1 THERMAL POWER PLANT - TWO (2) X 600MW.

2. SCOPE OF WORKS
This method statement also describes the general work methods and materials (including
machinery &equipment, manpower), quality control, HSSE necessary for the
construction Coal Handling Control Building and to ensure that the entire execution stage
of work is met with the Project’s specification and nation code.

3. REFERENCE DOCUMENT

3.1. PROJECT DOCUMENT
-

RFP documents: Appendix 2- section 6: Technical specification for cast in place

-

concrete.
Concrete work execution procedure No. SH1-LLMP0001-QA-G01-PRO-0003
Inspection and Testing Plan for Concrete work: No. SH1-LLMP0001-C-G01ITP-0007

3.2. DESIGN DRAWING
No
1

2

3

4

5
6
7
8
9

DRAWING NO./TÊNBẢNVẼ
Coal handling control building –

Pilecap PC-1, PC-2, Tie Beam
Details
Coal handling control building –
Framing Plan, Level EL+3.00,
Column Plan
Coal handling control building –
Structural Plan-Level EL+6.000,
Structural Plan-Level EL+11.600
Coal handling control building –
Structural Plan-Level EL+8.700,
Structural Plan-Level EL+15.600,
Structural Roof Plan
Coal handling control building –
Line Framing Elevation
Coal handling control building –
Column Detail
Coal handling control building –
Beam Detail
Coal handling control building –
Rebar Slab Plan EL+3.000, +8.700
Coal handling control building –

DRAWING
NO./SỐBẢNVẼ

REV.

STATUS

SH1-VNCC-P0100C-S02.2-DFN-1702

0

FC

SH1-VNCC-P0100C-S02.2-DCN-1701

0

FC

SH1-VNCC-P0100C-S02.2-DCN-1702

2DCN1

FC

SH1-VNCC-P0100C-S02.2-DCN-1703

1

FC

2DCN1

FC

1

FC

2DCN1

FC

0

FC

1

FC

SH1-VNCC-P0100C-S02.2-DCN-1704
SH1-VNCC-P0100C-S02.2-DCN-1705
SH1-VNCC-P0100C-S02.2-DCN-1706
SH1-VNCC-P0100C-S02.2-DCN-1707
SH1-VNCC-P0100-

Page | 5


1
0
11
1
2
1
3
1

4

Rebar Slab Plan EL+6.000
Coal handling control building –
Rebar Slab Plan EL+11.000
Coal handling control building –
Rebar Slab Plan EL+15.600,
+18.600
Coal Handling Control Building –
Slab Section
Coal Handling Control Building –
1st Staircase Detail
Coal Handling Control Building –
2nd Staircase Detail

C-S02.2-DCN-1708
SH1-VNCC-P0100C-S02.2-DCN-1709
SH1-VNCC-P0100C-S02.2-DCN-1710
SH1-VNCC-P0100C-S02.2-DCN-1711
SH1-VNCC-P0100C-S02.2-DCN-1712
SH1-VNCC-P0100C-S02.2-DCN-1713

1

FC

1

FC

1

FC

0

FC

0

FC

3.3. STANDARD AND CODE
II

INTERNATIONAL CODES AND STANDARDS

1

ACI 318

Building Code Requirements for Structural Concrete

2

ACI 304

Measuring,
Concrete

3

ACI 117

Specification for Tolerances
Construction and Materials

4

ACI 315

Details and Detailing of Concrete Reinforcement

5

ACI 347

Guide to Formwork for Concrete

6

ACI 308

Guide to Curing Concrete

7

ACI 311

Recommended Practice for Concrete Inspection

8

ASTM C150

Standard Specifications for Portland cement

9

ASTM C109

Standard Test Method for Compressive Strength of
Hydraulic Cement Mortars

10

ASTM C191

Standard Test Method for Time of Setting of
Hydraulic Cement by Vicat Needle

11

ASTM C115

Standard Test Method for Fineness of Portland
Cement

12

ASTM C185

Standard Test Method for A Content of Hydraulic
Cement Mortar

13

ASTM C151

Standard Test Method for Autoclave Expansion of
Hydraulic Cement

Mixing, Transporting

and

Placing

for

Concrete

Page | 6


14

ASTM C114

Standard Test Method for Chemical Analysis of

Hydraulic Cement

15

ASTM C142

Standard Test Method for Clay Lumps and Friable
Particles in Aggregate

16

ASTM C33

Specifications for Concrete Aggregates

17

ASTM C40

Standard Test Method for Test of Organic Impurities
in Fine Aggregates for Concrete

18

ASTM C128

Standard Test Method for Specific Gravity and
Absorption of Fine Aggregate

19

ASTM C136

Standard Test Method for Sieve Analysis of Fine
Coarse Aggregates

20

ASTM CS8

Standard Test Method for Soundness of Aggregates
by Use of Sodium Sulfate or Magnesium Sulfate

21

ASTM C1260

Standard Test Method for Potential Alkali Reactivity
of Aggregates (Mortar-Bar Method)

22

ASTM C295

Standard Guide for Petrographic Examination of
Aggregate for Concrete

23

ASTM C289

Standard Test Method for Potential Alkali-Silica
Reactivity of Aggregates (Chemical Method)

24

ASTM C1651

Standard Test Method for Measurement of Roll
Wave Optical Distortion in Heat-Treated Flat Glass

25

ASTM C370

Standard Test Method for Moisture Expansion of
Fired Whiteware Products

26

ASTM C494

Standard Specification for Chemical Admixtures for
Concrete

27

ASTM C31

Method of Making and Curing Concrete

Compression and Flexural Test Specimens in the
Field

28

ASTM C1064

Standard Test Method For Temperature of Freshly
Mixed Hydraulic-cement Concrete

29

ASTM C143

Standard Test Method for Slump of Hydrauliccement Concrete

30

ASTM C39

Method of Test for Compressive Strength of
Cylindrical Concrete
Page | 7


Specimens
III

VIETNAM CODES AND STANDARDS

1

TCVN 5574: 2012

Concrete and reinforced concrete - Design standard

2

TCVN 4506: 2012

Water for concrete
specification

3

TCVN 8826: 2011

Chemical admixtures for Concrete

4

TCVN 9340:2012

Ready mixed
acceptance

5

TCVN 4453 – 1995

6

TCVN 5724-1993

7

TCVN 9262: 2012

Tolerances for building - Methods of measurement
of buildings and building products

8

TCXDVN 305: 2004

Mass concrete - Code of practice for construction
and acceptance

9

TCVN 9343: 2012

Concrete and reinforce concrete structures – Guide
to maintenance

10

TCVN 8828: 2011

Concrete – Requirement natural moist curing

11

TCVN 1651: 2008

Steel for the reinforcement of concrete

12

TCVN 4399: 2008

Steel and steel products – General technical delivery
requirements

13

TCVN 2337 – 1995

Loads and effects-Design standard

and

concrete

mortar

–

-

Technical

Specification

and

Monolithic concrete and reinforce concrete
structures – Code for construction, check, and
acceptance
Concrete structure and Concrete reinforcement
structure – Minimum conditions for construction and
acceptance

4. DEFINITION
-

MS: Method Statement.
HSSE: Health, Safety, Security, and Environment.
QA/QC: Quality assurance / Quality control
JSEA: Job Safety and Environment Analysis
MSDS: Material Safety Data Sheet.
SH1PP: Song Hau 1 Thermal Power Plant
LLM: Viet Nam Machinery Installation Corporation
PTW: Permit to Work
Page | 8


-

START: Safety Task Analysis Risk Talk

PM: Project Manager
SV: Supervisor/foreman
SWMS: Safety Work Method Statement

5. PERSONNEL AND EQUIPMENT MOBILIZATION PLAN

5.1. PERSONNEL
5.1.1. Organization Chart
Lilama organization chart
VU NHU HUNG
CONSTRUCTION DEPT DEPUTY
MANAGER

LE XUAN BACH
CIVIL TEAM LEADER

NGUYEN DUC MANH
SITE ENGINEER

HNC organization chart
Rev. 1

DAO NGOC BICH
SITE MANAGER

NGUYEN VAN
MANH

TONG QUANG
KHUONG

QS MANAGER

QA/QC MANAGER

CONSTRUCTION
MANAGER

HSSE
ENGINEER

QS ENGINEER

QC
ENGINEER

SITE
ENGINEER

FORM WORK
TEAM

REBAR WORK
TEAM

CONCRETING
WORK TEAM

SERVICE
WORKER

TEAM

HO QUANG HAI
HSSE MANAGER

LE TRAN HIEU

Page | 9


Site Engineer
Tống Quang Khương
Team Leader

Trịnh Hoàng Phúc
Site Engineer

Nguyễn Xuân Tuyển
Site Engineer

5.1.2. Manpower
Manpower mobilization plan as the table:

Table – 1: Manpower mobilization
Manpower mobilization
No.
1
2
3
4

5
6
7
8
9
10
TOTAL

Category
D.P Manager/ Site manager
Engineer
Survey engineer
Welder
Rebar worker
Worker formwork
Scaffolding worker
Concrete worker
Common worker
Skilled masonry

Nos.
1
Required
4
1
2
10
10
5
5

5
4
47

Remark

Page | 10


5.2. EQUIPMENT
Equipment mobilization plan as the table:

Table – 2: Construction equipment
Construction equipment
No.

Item

Spec.

Nos. Required

1

Total station

1

2

Level machine

1

3

Rebar bending machine

1

4

Steel Cutting Machine

1

5

Portable cut off machine

2

6

Needle vibrator

4

7

Plate vibrating compactor

1

8

Wood cutting machine

2

9

Hand drill

1

10

Welding machine

2

11

Mobile crane

1

12

Perforated concrete machine

2

13

Concrete pumps

1

14

Concrete mix trucks

5

Remarks

Rev. 1

Page | 11


6. CONSTRUCTION METHOD

6.1. CONSTRUCTION SEQUENCE
Step1: CONSTRUCTION FOUNDATION
-

Construction foundation and beam from El+0.800 to El+2.000

Step 2: CONSTRUCTION COLUMN FROM EL+2.000 TO EL+2.400

`

Step 3: BACKFILL FROM EL+0.800 TO EL+2.000

Step 3: CONSTRUCTION BEAM FROM EL+2.400 TO EL+2.800

Step 3: CONSTRUCTION BEAM AND SLAB FROM EL+2.800 TO EL+3.000
-

Chipping beam and treatment construction joint
Pour concrete beam and slab

Step 4: CONSTRUCTION COLUMN FROM EL+3.000 TO EL+5.400

Step 5: CONSTRUCTION BEAM AND SLAB FROM EL+5.400 TO EL+6.000

Step 6: CONSTRUCTION COLUMN FROM EL+6.000 TO EL+10.25 ~EL+11.000

Step 7:CONSTRUCTION BEAM AND SLAB AT EL+10.250~EL+11.000 TO EL+11.600

Step 8: CONSTRUCTION COLUMN FROM EL+10.850 ~EL+11.600 TO EL+14.700

Step 9: CONSTRUCTION BEAM AND SLAB AT EL+15.600

Step 10: CONSTRUCTION COLUMN FROM EL+10.850 ~EL+11.820

Step 11: CONSTRUCTION BEAM AND SLAB AT EL+18.600

Page | 12


6.2. PREPARATION
Site preparation will be carried out including main activities list below:
-

Setting-out temporary benchmarks where required;
Site clearance/ accessibility.
Temporary offices, accommodation, storage for material and equipment;
Temporary access such as temporary road connection from main access;
Temporary workshop for rebar fabrication, formwork, embedded, etc.
Temporary fence/ barricade will be installed around opening excavated area
Water supply, electric power supply.

6.3. SURVEY AND SETTING OUT
-

All equipment must be calibrated and inspected before be used on the site.
Survey work will be carried out by Survey that was qualified.
The Contractor shall carry out a comprehensive level survey of the contract area

-

before any work commences on the site
In the setting out process, all elevation and coordinate transfer conducted shall

-

start on an established benchmark and finish on a different benchmark.
Before commencing their setting out, the surveyor should discuss with the site
engineer/foremen the methods to be used in the construction of the works. These
will require pegs, profiles, batter rules and other information in locations which
will not interfere with the movements of machines, men, and materials .

6.3.1. Benchmark
-

Subcontractor will setout Secondary benchmark with coordinate and elevation

-

transfer from established benchmark of Contractor.
The secondary benchmark will be inspected by the Owner/ Contractor.
Secondary benchmark shall be made of concrete with a dimension of 200x200 and

-

be buried from 30 to 50cm underground, and top of the control point shall be
marked with Red Cross painting. Or put on the concrete structure near
construction area (if any).
The secondary benchmark will be protected by barrier
The secondary benchmark will be checked at least one time a week.

6.3.2. Survey setting out
-

Surveyor would conduct site survey to setting out the lines, dimensions,

-

alignment, thickness and the level of foundation and structural for worker carry
out rebar and formwork installation
Surveyor would set out the position and level of embedded

6.3.3. Survey control
-

a) Benchmark:
Secondary benchmark will be checked every week or be threatened.

Page | 13


-

Checking level and coordinate with the line, alignment, and dimension during

-

install rebar and formwork to ensure they were carried out as per FC drawing.
After the erection of the formwork and prior to concreting, a survey check shall be

-

carried out on the formwork to ensure that the setting out has been done correctly.
Checking level and coordinate of the line, alignment, and dimension of formwork
and embedded during placing concrete.

6.4. FABRICATION AND INSTALLATION OF REBAR
6.4.1. Material:
-

Rebar material will be supplied by the supplier that were approved by the Owner/

-

Contractor
Each lot of rebar materials must be had “certificate of original” and “certificate

-

of certificate”.
Each lot of rebar material must be taken a sample as per ITP and specification.
Each lot of rebar material must be inspected by the Owner/ Contractor before be
used.

6.4.2. Cutting and blending:
-

The reinforcement bars will be cut and bent as per approval bar bending schedule.

-

After, the rebar will be labeled by a group including the following contents:
Foundation name, diameter, quantity, etc.…for easy identification during
installation work.
Carry out cutting and bending using appropriate machinery and tools, all hot

-

cutting and hot bending shall not be allowed.
Fabrication dimensional tolerance: As specify according to ITP for Concrete work:

-

No. SH1-LLMP0001-C-G01-ITP-0007.
Concrete spaces shall be made by suitable concrete strength grades according to

-

FDNs concrete strength and thickness according to specified of FC drawings.
Splicing of bars will be complied with “Standard drawing No SH1-DHI-P0100-CM01-DST-5707 Rev. 0.

6.4.3. Installation:
-

Delivery of fabricated rebar from workshop to construction area by truck or car

-

crane.
The surveyor would conduct a site survey to setting out the lines, dimensions,

-

alignment, thicken and the level of foundation and structural for the worker can
install rebar.
The rebar will be clean mud and rust before install

The rebar will be aligned horizontally and vertically from bottom to the top the

-

foundation schedule and structural detail.
The top rebar will be supported on the bottom bar by mean of chairs for

-

preventing bar sagging if required.
The position, quantity, alignment of starter bar of column shall be done per
approval drawing
Page | 14


-

Intermediate bars all around the sides of the foundation/pile caps have to be

-

provided.
Fasten embedded items securely in the proper position before placing concrete.
Fasten concrete spaces as FC drawings. Concrete spaces shall be made by suitable

-

concrete strength grades according to FDNs concrete strength and thickness
according to specified of FC drawings.
Install water stops if require. Ensure water stop will be installed straight and

plumb, half wide of water stop will be in concrete after finish placing concrete.

6.4.4. Inspection:
After rebar was installed, perform inspection according to ITP approved and
including:
-

Form, dimension;
Quantity and position of bars in each structure;
Stability and strongly of steel reinforcement;
Quantity, quality of concrete spacer between steel reinforcement and formwork.

6.5. FORMWORK
6.5.1. Materials:
-

Plywood panels seal with phenolic 1220x2440x20mm
Steel box channel 100x50x1.8mm
Steel box channel 50x50x1.8mm.
Steel plates 4mm thickness.
Other materials: Anchor rod D16, screw, support pipe, turnbuckle D14-D16, cable,

-

plastic cone, anchor rod D12 (Grade SD390), bolt M14 (L140), Sika Monotop R
or equivalent,
All materials shall be of good quality, newly production and properly transport
and store at the site according to manufacturer’ instruction.

6.5.2. Calculation of formwork

Formwork shall be designed for the loads specified in TCVN 4453 – 1995 and ACI
347.Detail of calculation sees appendix 1.
6.5.3. Typical formwork:
Detail of typical formwork see appendix 5.
6.5.4. Fabrication:
Fabrication of forms in a workshop at the site will be based on approved design of
formwork system. All fabricated formwork will be checked according to dimension,
flatness, etc. before handling to next stage. They shall be stored/ handled in a properly
manner to avoid any damaged or distorted to panels. Panel will be separately stored
adequately
6.5.5. Installation:
-

The surveyor will mark point for worker can install formwork as per FC drawing
Page | 15


-

Install horizontal and vertical bracing with amount and space as per approval

-

method statement.
Install form ties and props with amount and space as per approval method

-

statement.
Install chamfer (if any).

The surveyor will check alignment, dimension, straight, plumb and space to rebar
during installing formwork.

6.5.6. Requirement of formwork
-

Forms shall be sufficiently tight to prevent leakage of mortar and water
The support must be sufficient strength to keep the stability of formwork during

-

placing concrete and all time from finish placing concrete to removal formwork.
Formwork must be cleanness and flatness.

6.5.7. Inspection:
After rebar was installed, perform inspection according to ITP approved and including:
-

Dimension and alignment of formwork.
Formwork tie and support, formwork stability.
Surface cleanness, form oil (if require).
Formwork flatness and gap tightening.
Insert chamfer bar (if any).

6.6. POURING CONCRETE
The concrete of all structure shall be placed by using the pump. Concrete shall be
watched from the suppliers of concrete that were approved by the Owner and contractor.
Grade of concrete shall be according to approval concrete mix design
6.6.1. Preparing before pouring concrete:
-

Ensure the formwork and rebar were inspected and approved for pour concrete by

-

the Owner and contractor
All tool and equipment using for pouring and curing concrete are ready
Ensure access road for pump car and concrete mix truck
Ensure the source of supply ready mix and grade of concrete

6.6.2. Testing concrete:
-

All concrete test shall be carried by an independent laboratory that was approved

-

by the Owner and Contractor.
At the arrival of concrete at the site, the laboratory will do all necessary site check

-

of concrete i.e. concrete temperature, slump test, air content as per delivery mix
truck. Any unsatisfactory delivery will be rejected according to Technical
specification.
The laboratory will take the sample cube for 7 & 28 days compressive strength
test

6.6.3. Pouring concrete:

Page | 16


-

Concrete will be placed and drop freely less than 1.5 m. In FDNs which the drop

-

height is more than 1.5 m, we will open some rebar to make available holes for
pumping pipes to make drop height less than 1.5 m. Rebar will be re-installed
before the next layer is placing.
Placing concrete will be carried out from the inside to outside or from far to near

-

with the purpose of rainfall or excess water will flow out to avoid stagnant water
creates voids in the structure.
Concrete must be compacted by Concrete (needle) vibrator
Discontinuity time for next layer will arrange within 1.5 hours. The thickness of

-

each placing layer is not exceeding 30cm.
Check temperature of concrete (concrete temperature <32oC ‘normal’ and <28oC

-

‘mass concrete’), check ambient temperature, check slump (as specify ±2). Refer
No. SH1-LLM-P0001-C-G01-ITP-0007 (rev.1) and Technical specification of

concrete work.
Platforms panels will be provided to make a walkway for workers during concrete

-

placement.
We use the total station and auto level in full time to observe and recheck the

-

formwork and embedded items in the elevation and coordinates in order to ensure
they are not moved during concrete placement. Any moved item will be rectified
as timely. If the incident occurred without recoverable, we will stop placing and
carry out the joint preparing for next pour stage.
When final placing is done, special tools will be used to finish FDNs concrete

-

surfaces according to FC drawings requirement. Also, the top elevation will be
checked/ monitored while finishing to obtaining the elevations of FC designs.
A skilled masonry will be assigned to do the surface finishing work to avoid any
damage to finished surfaces of FDNs.

Page | 17


6.7. PROTECTION AND CURING OF CONCRETE
6.7.1. Curing:
-

The curing process shall commence as soon as the concrete hard enough to resist

-

damage from the process.
Concrete have been to cured by sweet water as instructed by the

-

Owner/Contractor.
All surface of the structure will be covered by wet sack cloth at least 7 days to
maintain.

6.7.2. Protection:
-

Freshly placed concrete shall be protected from rainfall and water running over

-

until it is sufficiently hard enough to resist damage.
No traffic shall be allowed on any concrete surface until it is sufficiently hard

-

enough to resist damage.
Freshly placed concrete shall not be subjected to any structure loading until it is
sufficiently hard enough to resist damage.

6.8. REMOVAL FORMWORK

6.8.1. Formwork Removal Time
-

Forms shall not be removed from structures until the concrete in the structure has
reached the sufficient strength to support the weight of the structure and any
superimposed load, including loads from construction operations. The Contractor
shall be responsible for limiting any applied loads. There shall be no evidence of
damage to concrete and no excessive deflection or distortion of members due
either to the removal of forms or to loss of support.

Table – 3: Formwork removal Time (refer: Technical specification for concrete work &
TCVN 4453:1995)
Type of Formwork

Formwork Removal Time

Sides of Walls, Columns and Vertical
faces of beam

24 hours

Removal of Props of Slabs and beams
Slabs and beams spanning up to 2m

50%R28

7 days

Slabs and beams spanning from 2m to 8m

70%R28

10days

Slabs and beams spanning over 8m

90%R28

28days

6.8.2. Sequence of removal formwork:
-

Removal of steel pipes braces.
Removal of horizontal steel boxes.
Removal of each fixative formwork plates.
Page | 18


-

Removal of insulation sheets for the side of the concrete block. The detail
procedures for remove insulation sheets and formworks as described in the curing
of concrete.

6.8.3. Removal formwork notes:
-

When forms are removed before the specified curing is completed, measures shall

-

be taken to immediately by continue curing. In cold weather conditions, adequate
thermal protection for the concrete shall be provided.
When removing the core phase, avoid sudden or collision damage to concrete
structures in which caused by unnecessary force applied.

6.9. FINISHED SURFACE
-

All concrete surfaces below ground and in contract with soil shall be covered by

-

bituminous.
Honeycombed and other defective concrete shall be chipped down to sound

-

concrete.
The using materials for the defective concrete treatment shall have strength

-

greater than or equal strength of concrete.
Repair of imperfection in the formed concrete will be carried out immediately

-

after the removal of formwork

After removal, the formwork, the plastic cone, and anchor rod will be taken out.
Plastic bevel position will be filled by mortar or equivalent to material approved.

Figure 2: Detail filling cone hole method statement

6.10.

CONSTRUCTION JOINT AND EMBEDDED

6.10.1.Construction Joint

-

The construction joints shall be treatment before placing concrete next step. The
construction joint treatment sequence as below:
Chipping to create rough surface before placing the next stage of concrete.
The surface has to be kept wet until the new concrete is poured. Joints shall be

-

cleaned of loose aggregates, surface film and contaminate by using air-water-jet.
Use support rebar to make the water stop straight and plumb.

Page | 19


Figure 3: Detail of construction joint
6.10.2.Chamfer
The chamfer installation sequence as below:
-

Chamfer are forked inserting a plastic strip into the concrete during installing

-

formwork
The distance chamfer will be installed as per FC drawing
Chamfer should be straight and continuous

Figure 4: Detail of chamfer

6.10.3.Embedded
-

Embedded will be installed as per FC drawing
Fasten embedded items securely in the proper position before placing concrete.
Check the elevation and coordinate of embedded during placing concrete and after

-

placing concrete.
For embedded materials and other steel work:(please refer to separate document
(shop drawing)

7. CONSTRUCTION SCHEDULE
Page | 20


-

Submitted separate document.

8. QA/QC

QA/QC MANAGER
QUALITY SUPERVISION AND
MANAGEMENT
– Construction supervision and
management No.1
– Construction supervision and
management No.2
– Construction supervision and
managementNo.3
– Construction supervision and
managementNo.4
– Construction supervision and
management No.5
– Surveyor supervision and
management No.6

CONSTRUCTION
EQUIPMENT

MATERIALS TO
THE SITE

STANDARDIZED LABORATORY

QUALITY DOCUMENT CONTROL

CONSTRUCTION
TEAMS

MECHANICAL
AND
ELECTRICAL
TEAMS

HNC will comply with the following:
-

Safety and Quality Management Plan, ref. SH1-LLM-P0001-QA-G01-PRO-0001.
Inspection and Testing Plan for Earthwork, ref. SH1-LLM-P0001-C-G01-ITP-

-

0006 Rev.0
Inspection and Testing Plan for Concrete work: No. SH1-LLMP0001-C-G01-ITP-

-

0007 Rev.1
Ensure that quality policies and objectives, procedures strictly comply with

-

project's standard.
Ensure that quality system always meets requirements of ISO 9001:2008 and the

-

Contractor’s quality policy.
Control all project activities to meet project requirements, including:
 Management plans
 Construction schedule
 Construction design drawings
 Method statement
 Material and equipment supply
 Others
Page | 21


-

HNC quality management plan will be adopted and complied with by

-

manufacturers, suppliers performing the contract C14/SH1-LLM-HANCORP was
signed on 31/07/2015.
Assess quality activities and related results against plans to verify the efficiency of
the quality plan of the Contractor.

9. HSSE

9.1. LEGAL PROCEDURES OF SOCIALIST REPUBLIC OF VIETNAM
FOR SAFETY AND HEALTH ARE BEING APPLIED.
-

Labor Code of the Socialist Republic of Vietnam.

Decree 06-CP of the Government
Decree 38-CP of the Government
Decree 46-CP of the Government
Resolution No.08 LD - TB - XH for training safety and health.
Resolution No.23 LD -TB - XH added Resolution No.08 for training safety and

-

health of Ministry of Labor - War wounded - Society.
Resolution No.26 LD -TB - XH - Trade of importing equipment, materials having

-

astricted requirement of Safety, must have permission.
Resolution No.07 TLD - LD - of Labor General League of operation content of

-

the Trade Union in protection.
Resolution No.20 YT - LD of Ministry of Labor - Health of policy for feeding - up

-

allowance to the labor.
Resolution No.121 LD -TB - XH - of Ministry of Labor for evaluating machinery,

-

equipment, material schedules having a strict requirement of Safety.
Resolution No.22 LD -TB - XH of the declaration, registration, permission

-

granting that have a strict requirement of labor safety.
Decision No.1407 LD -TB - XH of printing, publishing, using permission,

-

equipment having a strict requirement.
Resolution No.13 YT of Ministry of health for the guiding performance of

-

controlling safety and health, occupational disease.
Resolution No.23 LD -TB - XH of Ministry of Labor for guiding the performance

-

of periodic listing, reporting of an accident, occupational disease.
Resolution No.04 LD -TB - XH for guiding the definition of managing, producing

-

cadre bearing responsibility for labor safety.
Resolution No.03 YT - LD for using female labor.
Resolution No.13 LD of Ministry of labor for defining guideline of the unit

-

organizing and inspecting safety and health.

Technical norms of safety, construction, machinery electricity, equipment.

9.2. SAFETY CONTROL ORGANIZATION
9.2.1. Safety Control Organization
The Safety Control Organization will be as shown on the Safety Organization chart
bellow
Page | 22


Site
Manag

Safety

Safety

Officer

Mech. Unit

First Aid

Committ

Instrument
Unit

Electric

Constructio

Unit

n Unit

9.2.2. Responsibilities
Site Manager
-

The maintenance of a safe and healthy working environment.
Establishing and promoting practices and procedures to prevent accidents and

-

injuries.
Conscientious observances of all Safety committee and participation in Safety
activities.

Site Engineer/ Supervisor
-

To accept responsibility for the prevention of accidents in his section.
To enforce all general and section’s Safety rules and regulations
To investigate accidents and near misses with Safety Officer.
To inspect working areas regularly.
To ensure that all persons working under him are trained in safe and proper

-

working procedures.

To inspect his working areas, tools and equipment regularly.
To conduct regular section’s safety meeting at work sites.
To take stop-work action against any person working unsafely.
To rectify hazards pointed out by Safety Personnel or any other person.
To ensure good housekeeping at his work areas.
Let sub-contractors conduct Tool Box Meeting.

Employee
-

To obey all Company’s Safety Regulation to protect himself and his colleagues

-

from injuries.
To report all unsafely acts and conditions to his Supervisor immediately.
To report all accidents to his Supervisor immediately.
To seek advice from his Supervisor:
When an unusual situation develops which may appear wrong to him.
When he does not know how to do the job.
Page | 23


-

When he does not understand the instruction.
Not to create unsafe conditions.
To rectify any hazard or unsafe condition found at his area of work.
All workers including management staff and subcontractors in hazard area such as

-

welding, high-positioned work, painting, mechanical fabrication etc. shall submit
the Employee’s Declaration form (enclosed herewith ) prior to commencing work.
Should not abuse any safety provision.
Should be equipped with personal protective equipment. Such as hard hats, boots,
Etc.

Sub-contractors
-

To ensure that all respective agents and employees conform to the Company’s

-

safety rules and regulations.
To supply all employees with appropriate equipment and appliances when

-

working.
To attend Safety meeting when called upon.
To rectify all unsafe conditions and hazard when required by members of the

-

Safety section.
To ensure good housekeeping.
To report all accidents to the Safety Officer immediately.
To seek fist aid for all injuries, however, slight, at the fist aid station.

To be interlaid responsible for the implementation of Safety measures and full

-

Compliance with safety rules and regulations of the Company in respect of both
himself and all his employees.
Should accept the Safety & Health System of the main contractor and perform the
work accordingly. In case a subcontractor wants to apply his own Safety Plan
should be reviewed and approved by the main contractor.

Safety Officer
-

Formulating, administrating and marking necessary changes in the accident

-

prevention program.
Submitting directly to the Site Manager regular monthly or weekly reports on the

-

status of safety.
Acting in an advisory capacity on all matters pertaining to Safety as required for

-

the guidance of Management.
Maintaining the accident record system, making necessary reports, personal

-

investigations of fatal or serious accidents, securing supervisor’s accident reports
and checking corrective actions.
Making personal inspections and supervising inspections for the purpose of

-

discovering and correcting unsafe conditions or unsafe work practices before they
cause accidents.
Making certain the laws, ordinances or order bearing on Industrial Safety.
Starting activities that will stimulate and maintain employee’s interest.
Controlling or supervising fire-fighting activities.
Page | 24


-

Setting standards for Safety equipment to be used by plant personnel.
The Safety officer or his replacement will always be in contact with the site by
phone or other means.

9.3. HSSE MANAGEMENT PLAN
The Contractor shall comply with the regulations on the safety work of the project which
has been approved by the EPC Contractor / Owner approval, specifically as follows:
-

Site environmental protection plan, no. SH1-LLM-P0001-HS-G01-PRO-004

-

Rev.B;
Electrical safety procedure, no. SH1-LLM-P0001-HS-G01-PRO-0005 Rev.B;
Confined space entry procedure, no. SH1-LLM-P0001-HS-G01-PRO-0006 Rev.B;
Working at height procedure, no. SH1-LLM-P0001-HS-G01-PRO-HS-G01-PRO-

-

0007 Rev.B;
Scaffold procedure, no. SH1-LLM-P0001-HS-G01-PRO -HS-G01-PRO-0009

-

Rev.B;
Permit to work for the construction phase, no. SH1-LLM-P0001-HS-G01-PRO-

-

HS-G01-PRO-0011 Rev.B;
Emergency response plan, no. SH1-LLM-P0001-HS-G01-PRO-HS-G01-PRO-

-

0012 Rev.B;
And another relevant document.

9.4. THE PREVENTIVE MEASURES TO ENSURE SAFETY DURING
CONSTRUCTION
9.4.1. Before entering the work area:
-

Employees must register to enter the site (proper PPE must be worn).
Construction Equipment must have safety inspection certificate on request and
must be in a state of good quality for safety operation.

9.4.2. The safety requirements at work:
-

Employees must be aware of possible cases of the incident. The cause and how to

-

avoid them must be practiced.
The employee must be equipped with adequate protection and required PPE

-

during working time.
Employees must know the alarm and know how to act
Employees must aware of safety signals and to protect themselves when the

-

incident happened.
Only authorized personnel can move/ shift safety barriers or safety signs.
Only authorized personnel can change status of the equipment (operational or

-

non-operational)

Any accident or incident shall be reported promptly to the supervisor on duty and

-

must be recorded in the books for monitoring safety.
All unsafe conditions or unsafe actions should be reported to the supervisor on
duty.
Page | 25