Biện pháp thi công hoàn trả nền đường - Tiếng anh

HANOI PEOPLES COMMITTEE
HANOI METROPOLITAN RAILWAY MANAGEMENT BOARD (MRB)
DAELIM INDUSTRIAL CO., LTD

METHOD STATEMENT
PROJECT: HANOI PILOT LIGHT METRO LINE
Section Nhon - Hanoi Railway Station

PACKAGE: LINE-ELEVATED SECTION
PACKAGE NUMBER: HPLMLP/CP-01
METHOD STATEMENT FOR ROAD SUBBASE RE-INSTATEMENT
Location: Tu Liem, Cau Giay, Dong Da and Ba Dinh – Ha Noi City

PROJECT IMPLEMENTATION CONSULTANT: SYSTRA S.A
July, 2015
Project Reference: DLM-IMP-PPG-WVO-J00-00017-E-1A


Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

METHOD STATEMENT
PROJECT: HANOI PILOT LIGHT METRO LINE
Section Nhon - Hanoi Railway Station

PACKAGE: LINE-ELEVATED SECTION
PACKAGE NUMBER: HPLMLP/CP-01
METHOD STATEMENT FOR ROAD SUBBASE RE-INSTATEMENT
Location: Tu Liem, Cau Giay, Dong Da and Ba Dinh – Ha Noi City

Hanoi, date 23rd Jul 2015

HANOI METROPOLITAN
RAILWAY MANAGEMENT
BOARD (MRB)
Date of Approval
Hà Nội: ……./……/2015

CONTRACTOR
(DAELIM)

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

PROJECT
IMPLEMENTATION
CONSULTANT
(SYSTRA S.A.)

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

Contractor Approval / Revision Record Sheet

Revision

Date

Subject of issue / Revision

Authors

1A

23/07/2015

First Issue

Kim Shin Myung

Revision
N°:

1A

Name

Date

Prepared by

KIM SHIN MYUNG

23/07/2015

Checked by

SONG, HWA YOUNG

23/07/2015

Validated by

OH, SEUNG JONG

23/07/2015

Signature

Contractor specific comments:

Contens of table
1. GENERAL..................................................................................................................................................................5
2. REFERENCE.............................................................................................................................................................5
Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

3. SCOPE OF WORK...................................................................................................................................................6
4. CONSTRUCTION SCHEDULE............................................................................................................................6
5. SITE ORGANIZATION CHART..........................................................................................................................7
6. EQUIPMENT AND MANPOWER......................................................................................................................10

7. DESCRIPTION OF MATERIAL.........................................................................................................................10
8. CONSTRUCTION PROCEDUCE.......................................................................................................................11
9. QUALITY CONTROL...........................................................................................................................................12
10. ENVIRONMENTAL, SAFETY AND HEALTH CONTROL.......................................................................13
11. TRAFFIC CONTROL PLAN.............................................................................................................................14
12. APPENDIX.............................................................................................................................................................15

Abbreviations
MRB
PIC
DLM

Hanoi Metropolitan Railway Management Board
Project Implementation Consultant (SYSTRA S.A.)
Daelim Industrial Co., Ltd

Project References
Ref N°

Ref ID number

1

DLM-IMP-PPG-WVO-J00-00017-E-1A

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

Ref description
Method statement for road subbase reinstatement

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

1. GENERAL
This MS describes Sub-base and base course work wich shall be carried out in accordance with
Technical Requirements Part II, Chapter II-2 – Section 11: Re-instatement. The road work consists of
constructing Sub-base, base course at foundation excavation

2. REFERENCE
2.1 REFERENCE DOCUMENT
-

Technical requirements: Item 11 Road re-instatement
Construction Management Plan, document No.: DLM–IMP–PPG–ZCO–J00–0000–E/V
Quality Management Plan, document No.:
DLM–IMP–PPG–ZPQ–J00–00001–E/V
Supply Management Plan, document No.:
DLM–IMP–PPG–ZPO–J00–00001–E/V
Transportation Management Plan, document No.: DLM–IMP–PPG–ZPO–J00–00004–E/V
Safety and Health Management Plan, document No.: DLM–IMP–PPG–ZSO–J00–00003–E /V
Environment Management Plan, document No.: DLM–IMP–PPG–ZSO–J00–00002–E/V
Security Management Plan, document No.:
DLM–IMP–PPG–ZSO–J00–00001–E/V

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

2.2 RREFENCE STANDARDS
- Determining the liquid limit of soil AASHTO T89-02
-

Determining the plastic limit and plasticity index of soil AASHTO T90-02
Procedure of compacting soil, ballast in laboratory 22 TCN 333-06
Experimental procedure determine CBR of soil, ballast in laboratory 22 TCN 332-06
Material for concrete and test method TCVN 7572-12:2006
Determining field density 22 TCN 346-06
Sieve analysis of fine and coarse aggregates AASHTO T27

3. SCOPE OF WORK
This MS will be apply for all foundation of project with thickness of subbase is 80cm. Follow
technical design, the thickness of pavement and embankment is 40cm subbase, 18cm base and
12cm asphalt but to pier cap constructrion, DLM propose that hole backfill by subbase with
thickness is 80cm from existing road surface with requirement follow technical requirement
of project. After pier cap construction finished, contractor will be remove only 30cm in 18cm
base and 12cm asphalt, after that leveling and re-compaction to meet technical requirement of
subbase re-instatement and continute for base course, asphalt construction.

4. CONSTRUCTION SCHEDULE
Construction schedule for the road re-instatement will be submitted after approval of the overall
construction schedule and based on practical work.

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

5. SITE ORGANIZATION CHART
5.1 ORGANIZATION CHART FOR MAIN CONTRACTOR DAELIM

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-instatement

5.2 PERSONNEL ORGANIZATION FOR SUB – CONTRACTOR TYPYCAL BRIDGE

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

5.3

Method statement for Road subbase re-instatement

PERSONNEL ORGANIZATION FOR SUB – CONTRACTOR SPECIAL BRIDGE
Project Executive Director /
Giám đốc ban điều hành
Mr. Lê Lệnh Bắc
Phone: 0987.520.820
Email:

Construction Manager/
Chỉ Huy Trưởng
Mr. Lê Thảo Tâm
Phone: 0987.520.820
Email:

Designer/
Thiết kế
Mr. Lê Minh Trà
Phone: 0912-337-176
Mr. Bùi Trần Hà
Phone: 0983-718-345

Design Team/
Tổ Thiết kế

QA, QC/
Quản lý chất lượng

Mr. Ngô Thế Quỳnh
Phone: 0916-042-060

QA, QC Team/
Tổ quản lý chất
lượng
Mr. Cấn Mạnh Hùng
Phone: 0903-288-831
Mr. Lê Văn Long
Phone: 0947-211-268

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

Construction Team/
Bộ phận thi công
Mr. Trần Hữu Thắng
Phone: 0983-899-315

Testing Team/
Tổ Thí nghiệm

Concreting
Team/
Tổ Bê tông

Planning,QS Team/
Bộ phận Kế hoạch, khối
lượng
Mr. Lê Thăng Quân
Phone: 01683-636-867

Rebar/ PT
strand Team/
Tổ Cốt thép/
cáp DƯL

Mechanical Team/
Bộ phận máy thi
công
Mr. Cao Tiến Sơn
Phone: 0985-320-691

Form Work
Team/
Tổ Cốt pha

Clinic Team/
Tổ Y tế

Surveyor Team/
Đội Trắc đạc
Mr. Khuất Hữu
Thuận
Phone: 0972-796-481

S.H.E/
Bộ phận An tòan, Sức khỏe,
Môi trường
Mr. Nguyễn Quang Hiếu
Phone: 0919-780-066

Mr. Nguyễn Thanh Thản
Phone: 0913-560-427

Safety Team/
Tổ An toàn
Mr. Phạm Ngọc Tiến
Phone: 01686-539171

Traffic Assurance
Team/
Tổ Đảm bảo giao
thông

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

6. EQUIPMENT AND MANPOWER
6.1 EQUIPMENT
The list of equipment and manpower for a 1 team of road re-instatement as below.
List of equipment for road re-instatement for 1 team construction
No.

1
2
3
4

5
6
7

Equipment

Description

Unit

Quantity

Roller

Contractor

Vehicle

1

Excavator

Contractor

Vehicle

1

Rammer

Contractor

Piece

4

Dump truck

Contractor

Vehicle

2

Survey instrument
Air compressor
Lighting system

Contractor
Contractor
Contractor

Piece
Piece
Set

1

Remarks
MS only for Sub-base

2

By electricity

6

For night works

6.2 MANPOWER
Number of workers for road re-instatement for 1 team construction
No. Manpower

Description

Quantity

1.

Foreman

To control the construction group

2

2.

Skilled workers (1)

For the measurement, electrician

8

3.
4.

Skilled workers (2)

For driving cranes, rollers,

4
12

Common workers

Remarks

Equipment and manpower may be changing base on site condition.

7. DESCRIPTION OF MATERIAL
a, Materials for sub-base shall be free of unsuitable materials as specified below:
- Material encountered in cut areas and in the foundation of the embankment that is
unsuitable for the planned use shall be excavated and disposed of as directed by the
Engineer. Backfill as necessary shall be with approved material.
- Highly organic clays and silts, peat, soils containing large amounts of roots, grass and
other vegetable matter are considered to be unsuitable.

b, Besides, stabilized aggregate material for sub-base will obey the requirements for grain size
having Dmax = 37,5 mm as follows:
Size of square

mesh (mm)

50

37.5

25

19

9.5

4.75

2.36

0.425

0.075

Percent of
passing sieve
mesh

100

95 - 100

-

58 - 78

39 - 59

24 - 39

15 - 30

7 - 19

2 – 12

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

c, Requirement Criteria of materials grade aggregate
No
1
2
3
4
5
6
7

Technical criteria

Stabilized
Aggregates

Wearability Los Angeles of aggregate (LA),%

≤ 40

22 TCN 318-04

Bearing ratio CBR at compactness K98,
96 hours maceration , %

30

22TCN 332-06

Testing
method

Liquid limit (WL),%

≤ 35

AASHTO T89-02 (*)

Index of Plasticity(Ip),%

≤6

AASHTO T90-02 (*)

PP index = Index of Plasticity Ip x % of passing
0,075mm sieve mesh

≤ 60

Content of flat rhombic piece, %
Compaction density ( Kyc ), %

≤ 15
≥ 98

TCVN 1772-87 (**)
22TCN 333-06
(Method II -D)

Notice:
(*) Liquid and plastic limit is determined by testing with percent of passing 0,425mm sieve mesh
(**) Flat rhombic piece has thickness or width <= 1/3 length.
Testing with grain size which have diameter > 4,75mm and seize 5% mass of sample. Content of flat
rhombic piece is determined by average of results of each grain size.

8. CONSTRUCTION PROCEDUCE
8.1 WORKING FOLLOW

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

8.2 DESCRIPTION OF WORK SEQUENCE
 Prepare Construction
 Prepare material Sub-base
− Sub-Base Materials must be acceptable by consultant
− Sub-Base Materials must be gathered to dump at the construction site to conduct the
inspection, assess the quality of materials.
 Preparation of works
− Sub-base materials shall only be placed if final layer of black sand material has been
passed with the Field Density Test and has been accepted. In any cases, if the
preceding layer not meeting compaction requirement, such layer shall then be
scarified, homogenized, given the adequate moisture and shall be compacted again in
accordance with the required densities
− For the foundation of the site work or the old road surface, to detect treatment
thoroughly spoiled positions locally.
 Preparation for construction equipment:
Fully mobilize major equipment such as dump truck, rollers, rammer, level machine
and manpower.
 Sub-base construction
− The Sub-Base material shall be placed and compacted by layers in accordance with
technical requirement and full foundation of Sub-Base as shown on approved working
drawings. Since thickness of Sub-Base is 80cm layer and shall be spread in layers with
un-compacted thickness up to 25cm. Compaction shall be in accordance with
specifications and using Roller or rammer. Sub-Base material at the location where

roller can not access shall be thoroughly compacted by use of mechanical rammer.
Care shall be taken to prevent segregation of the material into fine and coarse parts.
− Sub-base material shall be transported by dump truck and unloaded to the site and
leveled by worker. After unloading, the Sub-Base material moisture shall be checked
by visual by the Engineer. If material contains too much moisture to obtain required
compaction degree, the material shall be dried out before compaction, if not enough
moisture it will be sprinkled with water as directed by the engineer.
− Immediately following final spreading and smoothing, each layer shall be compacted
to full width by approved roller, and shall continue until the entire surface has been
rolled and each layer shall be compated to at least 98% of the maximum dry density as
determined by procedure of compacting soil, ballast in laboratory 22TCN 333-06
− Any irregularities or depressions that develop shall be corrected by loosening the
material at these places and adding or removing material until the surface is smooth
and uniform. At all places not accessible to the roller, the material shall be compacted
thoroughly with approved tampers or compactors.
− The finished Sub-base shall not vary more than 15mm above or bellow the planned
grade at any point, The thickness of the finished sub-base shall be not thiner than
15mm of the thickness requirement at any point.

9. QUALITY CONTROL
Quality control shall follow Quality plan Doc. No. DLM–IMP–PPG–ZPQ–J00–00001–E
project and is the part of this method statement.
“Inspection and Testing Plan” is attached in Appendix.

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

of the

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

10. ENVIRONMENTAL, SAFETY AND HEALTH CONTROL
Enviromental, safety and health control for subbase re-instatement must be refered to document that
already approved:
- Safety and Health Management Plan, Doc. No. DLM-IMP-PPG-ZSO-J00-00003–E/V.
- Enviromental Management Plan, Doc. No. DLM-IMP-PPG-ZSO-J00-00002-E/V
- Traffic Management Plan, Doc. No. DLM-IMP-PPG-ZPO-J00-00004-E/V
During construction process, the Contractor pays more special attention to safety issues on the
construction site. To achieve that, the Contractor implements the following works.

10.1

HEALTH AND SAFETY CONTROL

- Safety Management will follow “Plan of Safety and Health Control of the project” and as a part of
this measure.
- Before and during the backfill, basic preventive measures will be fully implemented to avoid
accidents or incidents.
Items to control safety are as follows:
No.

Foresee accidents

1

General

2

Traffic accident

3

Electrical accident

4

Other works

10.2

Preventive actions
• Before backfill, hold a meeting with the personnel on the
purposes of generally explaining all work contents as well
as how to construct effectively.
• Limiting speed (20 km/h) on the construction site.
• Vehicles must have signal instruction staff when going
backwards
• Arrange personnel in charge of turn signal at the entrances.
• Install adequate earthing for equipment with stringent
requirements as welders and generators.
• Do not use the device with current exceeding capacity of
the conductors and protective circuit breaker.
• Be sure to use the appropriate outlet for the outdoor power
outlet
•The welding is carried out with full suitable protective

equipment as welding helmet, leather gloves, and aprons.
• Do not carry out welding work outdoor without shield
when it rains.
• Conduct daily equipment inspection to confirm the
equipment status.
Need to arrange proper lighting system when conducting
work at night.

ENVIRONMENTAL CONTROL

- Environmental control is followed “Environmental Management Plan for the project” and as a part of
this method statement.
- Responsibility to protect surrounding environment will be implemented during construction process
and complied with Conditions of Contract and Environmental Protection Law of Vietnam and other
relevant laws such as Decree No.175/CP of the Government, Decree of guiding the implementation of
Vietnam Environmental Protection Law, 1994.
More attention is to control the following items:
a) If the gathering time is longer than 2 days, measure of covering anti-dust mesh will be
considered.
b) All grounds of vehicles must be washed before moving.
Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

If there are any other problems arising on the construction site, preventive and remedial measures will

be applied and proceeded immediately as quickly as possible.
These issues will be controlled in term of management by the respective Construction manager and in
term of actual operations by respective Engineer.

11.TRAFFIC CONTROL PLAN
Traffic control plan shall follow “Traffic Management Plan” of the Project and is a part of this
method statement.

11.1
ALTERNATIVE FOR MACHINE AND VEHICLE GOING INTO AND
OUT OF SITE
- Construction plants and vehicles, especially heavy equipment i.e crane or drilling machine… going
into and out of Site through 2 lateral entrances shall be likely to cause unsafety and danger incidents
and vehicle collision which affect the construction organization.
- To narrow the fencing area shall mitigate the rotating space for cranes and drilling machine. Other
construction equipment operating in too small space without sufficiently operational area shall put
threat to labor safety.
- Pump truck shall not have sufficient stop area for concrete pumping.
- Vehicles going into and out of construction site shall not be cleaned, which as a result affect the
environmental hygiene.
- Alternative for optimizing and minimizing the impacts during the construction shall focus on
organization of on-road vehicle flow and on-duty construction machine and plants
- Traffic volume on the alignment is very large; therefore the construction shall greatly affect the
current situation of traffic flow. During the construction especially when a large quantity of materials
shall be delivered for the Works which resulting in the roadbed occupation, optimal alternative for
traffic safety assurance shall be required. Alternative for traffic safety assurance shall be submitted to
local authorities and management units in order to determine the plan and time for transportation of
large and heavy components, equipment as well as disposed materials. By this way, it shall greatly
mitigate the traffic pressure on the alignment.
- Motobike going into and out of Site shall transport in the proper entrance and be restrained to

transport in the opposite lane and direction, which shall be cause the unsafety and traffic congestion.
Road users shall perform this task in the proper manner.

11.2
ALTERNATIVE FOR TRAFFIC CONTROL
CONSTRUCTION AND ROADBED OCCUPATION

DURING

THE

- According to this alternative, we shall install the fence on the handed-over site by MRB after
obtaining the permission for construction and roadbed occupation; to work with traffic management
unit and relevant local authorities in agreement of traffic directional distribution; to take advantage of
support by traffic management units and agencies to ensure the favorable and safety implementation of
the Works.
- To install the fence to separate the construction area and traffic flow. To propagandize to local
residents in the neighborhood of construction site as well as take advantage of support by local people;
at the same time to install the signboard upfront the interchange as warning to road users.
Construction during the night time shall be carried out within the entirely covered fencing area with
installation of flashing lights in order to ensure the traffic safety outside. Construction during the night
time shall unavoidably cause the noise pollution. Therefore, it is required to take compatible
countermeasure; in case of great noise during the construction, based on the actual condition, noise
Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

Method statement for Road subbase re-insatement

barriers shall be arranged. Construction area is located near residential area; the works which can
cause great noise shall be required to be carried out in the day-time.
- In the rush hour, at locations which is likely to cause traffic congestion, it is required to arrange
persons in charge of traffic directional distribution in order to avoid any congestion and accidents.
When construction of pier using sheet piles, guardrails shall be installed around. When operating the
crane, operator shall ensure that no components of crane shall protrude out of the fencing area. Any
uphigh operation shall be equipped with safety belt/ devices and safety net in order to ensure the
construction without affecting the outside environment.

11.3

RESPONSIVE METHOD TO TRAFFIC INCIDENTS

If any traffic incident occur near the construction area, immediately call the emergency 113, 115 and
nearest relevant agencies for solutions. Based on the actual condition, to timely proceed with traffic
diversion.

12.APPENDIX

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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12.1

Method statement for Road subbase re-insatement

APPENDIX 1: INSPECTION TEST PLAN (ITP)

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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Project of Pilot Urban Railway Route in Hanoi City

12.2

Method statement for Road subbase re-insatement

APPENDIX 2: CONSTRUCTION METHOD DRAWING

Reference No: DLM-IMP-TRE-WVO-J00-00017-E-1A

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