Thuyết minh biện pháp thi công nhà xưởng bằng tiếng anh

Thuyết minh biện pháp thi công nhà
xưởng bằng tiếng anh
BY ADMIN · MARCH 25, 2016

TECHNIQUE EXECUTION
METHODS
AND
CONSTRUTION WORK
PROGRESS

Project: NienHsingGarment


Location: Thaibinh
province

INDEX
Content

Page

Part A: Technique and progress content

4

Execution method explanation

4

A.I.1

Introduction

4

A.I.2

Preparation work

4

A.I.3

Arrange plan

6

A.I.4

Execution method

7

A.I


A.I.4.1

Foundation execution method

7

A.I.4.2

Concrete execution method for body part

9

1

Execution of wall, concrete, steel, pit floor

9

2

Reinforcement assembling

9

3

Contruction

17

Completion methods for finishing work

19

1

Plaster

19

2

Pressing and plastering work

19

3

Painting work

20

4

Glazing execution

21

5

Door installation

21

6

Electricity, thunder proctection

22

7

Drainage and supply water system

23

8

Damp-roof work

23

A.II

Construction execution progress and construction progress
guarantee

24

A.III

Guarantee method of construction quality

25

A.III.1

General explanation

25

A.III.2

The explanation about material and machine supply .
Contractor will appply works standard guarantee quality

25

A.I.4.3


acccording to design
1

Main materials

25

2

Equipments

25

Human resource arrangment

26

1

Technical supervisors

26

2

Technical engineers and workers in work

26

3

Workers

26

A.III.4

Equipments for execution

26

A.III.5

Execution arrangment

27

A.III.6

Acceptance

27

A.III.7

Material supply

27

A.III.8

List of main materials used in construction

28

A.III.9

Technical method to guarantee work quality

29

1

Reinforcement

29

2

Concrete execution

29

3

Formwork excution

30

4

Construction

30

A.III.3

A.III.10 Apply progressive science and techonology in construction

A.III.11

List of main machine and equipment in construction
execution

30

31


A.IV

Maintenace commiment

32

Part B: Fire fighting method, safety-insurance bid
environental hygiene safely for surrounding work

33

Fire fighting method, safety-insurance bid environental
hygiene safely for surrounding work

33

B.I.1

General explanation

33

B.I.2

Safety –insurance for worker, risk of contractor

33

B.I.3

Material safety, equipment

34

B.I.4

Security

34

B.I.5

Environment sanitation

34

B.I.6

Fire ,earthquake, flood and storm prevention method

34

Safety for surrounding work

35

Part C: Conclusion

35

Part D: Drawing

36

B.I

B.II

PART A


TECHNIQUE AND PROGRESS CONTENT
A.I:EXECUTION METHOD EXPLANATION
A.I.1: INTRODUCTION
Project :NienHsing-Gament
Location: Thai Binh -Province
1.
Content of bidding package
Construction work is built on the area DaiTin Industrial –Thai Binh
Province
Contruction work includes 20 articles . Main factory has size 403×60
m . Moreover, It has some articles such as : guard house, birk shed .
Construction work has great denstity, thus in construction progress,
it is necesar to locate plan reasonably .
A.I.2: PREPARATION WORK

Contractor confirms preparation with large decision to quality of
construction. After searching for drawing contractor sees that this
work requires high quality art, these are some preparation of
contractor before execution
Document
After searching for contractor’s drawing which manage quality work,
setting up legal document management is through out from
company to construction site such as: employee document includes
labor contract, labor safety commitment; material equipment
management file includes tested material quality results, checking
equipment; completion certificate. In Contractor office, there a team
of skillful engineer who sets up solution method execution progress
for each work in details. Pursuant to execution progress file,
contractor has planed to prepare manpower, materials, and
construction equipments. Document is proceeded by contractor and
finished when starting execution.
1.


2. Human Resource. Contractor will appoint a vice director who
controls execution directly.
_ Technology department of contractor has an experienced team
of staff who regularly follows up quality of construction work
_ Manpower: Contractor has been executing many project of
Taiwan, China, Korea and Japan, so contractor has a skillful and
responsible team in construction work. However, contractor still
confirm quality of human resource to the success of contractor.
Hence, staffs are still trained to enhance ability and especially,
100% of workers are must work with good health skills and safety.
_ Human resource: Contractor arranges human resource depend

on work, especially main work like concrete building, plaster will
be guaranteed for production line. Professional labor team divided
into plaster, building, plaster, steel, concrete, electricity, water
supply, equipment installation is combined tightly with each other
in execution to ensure progress.
3. Material, equipment
_ Material and supply: Investor must test material before using,
quality of main material must be tested. Material must be
estimated to be suitable for progress and construction plan in
each period. In this work contractor focuses on concerning about
things for high quality and artic construction work.
_ Equipment: Contractor has plan to use equipment reasonably,
depends on work amount and progress, to supply on execution
time, right standard
4. Plan
Plan preparation affects to execution progress and
construction work quality significantly. To arrange reasonable
plan, contractor will proceed survey and search for plane,
confirming plan of execution, set up execution progress in detail


for each category to define office location, store, material ground,
mixing machine area and entrance during execution time
Contractor proceeds preparation such as locating
construction, calculating material transport road, transport land,
necessary area for mixing concrete ground, small structure,
installation, mixing mortar, brick ground and formworks, steel
ground and ensure arranged reasonable plan.
After calculating for necessary, contractor proceed to protect
from dust for environment



Main requirement
After calculating above floor limiting fallen materials as well as
dust.
After executing floors, Contractor will proceed to spread

A.I.3-ARRANGE PLAN
Plan must be installed electricity, water supply, control office,
tent, depot, other tents are arranged to be convenient for
execution
Construction concrete is fresh concrete and use concrete
pump
1.

Requirements when arranging execution plan
When arranging the execution plane, contractor will calculate
to ensure following factors:















1

Offices and depots: Ensure enough area, satisfy functions of
office.
Store floor is embanked high and chocked for damp-proof to
cement
Inflammable materials are put separately and packet in
buckets
Fire extinguishers in offices and depots
Security office: Near the entrance and observable to
everywhere in the construction site. Fixed telephone, fire
extinguishers, security equipments in security office
Reinforcement executing ground: Tent floor is built high and
have satchels
Formwork assembling ground: Contractor uses most of
corrugated ion formwork. The system to support formwork is log
of wood and steel log. Contractor is responsible for maintaining
formwork.
Contractor also uses both steel and wooden formwork. Thus,
processed formwork must be far away from depots
Water supply
Contractor must contact with investor and local government to
have water for execution
Water supply system is tight in the ground and far from road

1

Sewage system
Contractor installs a temporary sewage system, connect water
from many areas and pump water to gas hole.

1

Electricity
Contractor supplies electricity and private wire to electricity box.
Moreover, contractor prepares generator to guarantee electricity.
Using rubber covered cables with 3 phases or 4 cores. There is
electricity clock to measure electricity numbers


There are 2 main power sources:



1

For equipments and machines
For other activities
Contractor installs tension pole across roads, wire is larger than or
equal 4 m
Lighting system
Contractor installs headlights around the work, Light system to
protect and serve for execution at night
Moreover, contractor supplies another dynamo.40KVA ensures
lighting of work and serve machines in case of power cut or
executing process at night
Arrange plan, contractor guarantee the standard of work,

environment, security and safety.

A.I.4. EXECUTION METHOD
GENERAL REQUIREMENT
Guarantee execution steps as same as design
Guarantee safety for people, machines and work
Guarantee surrounding environment
Avoid making noise
Clean transport means when leaving the work
Contractor covers the boot of bike when going out the wor




Execution method
Base on the drawing, contractor gives the method presented
following
Survey method


Contractor surveys when beginning executing work. Survey
engineers help experiences and take part in many works
In order to set up, maintain figures in work correctly, survey
team receives a border line and investor’s standard (receivable
certificate). Then, team is responsible for defending border line
and fix.
Base on border line high standard to main pivot, set up pitch
system to confirm the pivot. Setting up pitch by: each pitch is
confirmed by center point. This point is set up to use easily and
exactly, not affect to execution. In execution, contractor bases on

pitch and height to execute according to requirement of investor
and drawing
Survey is always checked and noted in detail. Figures are
announced to investor
A.I.4.1 FOUNDATION EXCUTION METHOD
1)Excavation method
Due to large amount of land, we use both method of machine
and manuals. Excavating by machine is used regularly, using
manuals to fix foundation hole. Excavating and fixing foundation
hole follow to designed depth.
Around hole, drainage ditches and arrange pump to absorb
water continuously in case of rain.
Excavation process is suitable for restriction to guarantee the
stability of roof. In case of less stable place, we process to build
stake.
Dimension, form, height of foundation hole must be suitable
for design. Taking over before going on next work.


* Risk of excavation
Digging in the heavy rain causes soil fall. After rain, filling in
hole, change 15cm in hole in comparison to designed level. After
fixing each ground layer, replacing foundation by concrete bricks.
There is “underground rock” or other, replace by mixing sand
and crushed rock.
Filling up foundation hole
After executing foundation concrete, filling foundation hole.
* Technical requirement in filling land
When covering sand, guarantee that foundation sand has
moisture in restricted area. Dry sand needs to be watered; reduce

moisture for much humid sand.
Cover sand and distribute into each layer and stamp.
*Technical method
Use compactor and worker.
Stamp layer to another tightly
Fill sand by line
2. Foundation work
After finishing foundation, place and fix it.
Pour the lean concrete layer for foundation. Use survey machine
to confirm centre and mark on the surface of middle layer
concrete. Proceeding steel installation when the concrete commit
to the hardness. Use block for small concrete with the same
depth as concrete layer for steel. Label of this is equal to one of
foundation concrete.


After reinforcement assembling, installing casing used iron
formwork. Foundation formwork commit to designed type.
Foundation casing is kept by steel column which is wrapped and
wooden column. It is important for contractor to guarantee
stability of formwork.
Checking steel formwork and cleaning before pouring
concrete.
Pour foundation concrete: Replace mixed concrete into
concrete pump. Material of concrete commits to clean standard.
Use stamping concrete d=45-60mm to stamp concrete. The
concrete is poured into each layer and damped following to
technique. Surface of foundation is smooth by hawk, guarantee
flat degree and designed level.
Covering foundation is only proceeded after maintaining concrete

following technique finishing, underground work and accepted by
investor.
A.I.4.2: CONCRETE EXECUTION METHODS FOR BODY PART
RAW MASONARY
1.

Execution of wall, concrete, steel
Base on structure design contractor estimate, design using casing
and recycling during work.
Reinforcement assembling
Tie block concrete with the same thickness as protected concrete
and grade as one of structure concrete.
Preliminary acceptance for reinforcement
Drill concrete floor to hammer steel to fix wall thickness


Formwork assembling in one side only
Pour concrete for wall
2. Reinforcement assembling
Before install steel for the wall, contractor uses survey
machine to define centre of pivots on the concrete floor
Base on pointed centre on the concrete, check the right
position of steel, tight steel to other steel in case of right position
* Wall reinforcement procedure
– Drill to create roughness of wall foot concrete and clean
– Adjust straight ahead steel bar, ensure distance between
steel bar
– Connect straight steel bars with another
– Install cross-bar
– Adjust steel bars to guarantee size and distance between

bar
– Tie steel and concrete block into one side, the number of
block mass ensure to make steel stable and unbroken.
– After finishing work, investor checks steel. Contractor only
proceeds to combine formwork if it reaches requirement.
Wall formwork combination
Contractor confirms: Formwork combination must make wall
straight, flat, smooth. Thus, formwork must be hermetic, stable.
Corrugated iron formworks have the same size as structure size.
1.

In case of missing corrugated iron formworks, contractor
uses wooden formwork. Contractor cleans and paints a petrol layer
before using to untie easily.


* Formwork assembling procedure
Base on defined centre of pivot. Line 2 lines to wall edge.
Drilled hole D12, distance 1.5m per 1 hole.
Hammer steel pieces D12 following to line in order to
become bolt inside formwork
Combine one side corrugated iron form work.
Install steel boxes into 3 lines:
Line 1: 20cm from bottom of concrete wall
Line 2: 60cm from Line 1
Line 3: 15cm from wall surface
Boxes control thickness of concrete wall. If thickness of wall
always commit to standard, casing will not be deformed.
After installing and fixing boxes bar, conducting to tie
concrete block into other steel wall side. Then, clean wall foot and

combine casing.
After combining, casings are propped up by length control
machine. Contractor uses D12 cable with control machine to control
and to pull casing inverse to propulsive force of pulled bar in order
to balance pressing force on casing, guarantee stability of casing
and control wall casing to the right or the left easily.
After combining casing, contractor invites investor to check.
Next, contractor prepares to pour concrete.
Concrete pour requirements
Avoid changing position of steel, formwork and guarantee
the depth of protected concrete layer.



Pouring concrete continuously in oder to avoid separately of
concrete until finishing any structure following to design.
The height of falling concrete is smaller than 1.5m to avoid
classifying. If it is higher than 1.5m, pour concrete by sloping
conduit or movable pipe. Material conduit must be smooth and
hermetic. Material conduit width is as 3.5 times as the largest
diameter of reinforcement. Slope of conduit is guaranteed for
concrete not stuck.
Pouring concrete note:
Formwork, scaffold and reinforcement are tested tightly in
case of trouble.


Concrete is stamped by stamping machine. All position is
stamped in the right way.
Canvas is available to cover concrete when rain. Concrete is

not poured because of problems, wait until it reaches at 25kg/cm2.
Before pouring, roughness flat is handled, pour solid cement, mix
additive for damp-proof.
Thickness of concrete layer bases on concrete supply,
transport distance, type of stamping power, characteristic of
structure and it doesn’t exceed standards:
Straight stamping: Length of each layer <= 1.25 length of
stamping
Across stamping: Length of each layer is 12- 20cm.
Following and noting contents in periods of pouring concrete:
Beginning and ending time
Concrete grade, depression


Concrete amount in each period
Check concrete sample
Temperature
Concrete temperature
Concrete maintenance: Useful for developing speed of
concrete according to design requirement, method, and concrete
maintenance procedure TCVN 5592-1991. “Heavy concrete requires
natural warm maintenance”. Moisture maintenance procedure
divided into 2 periods: first maintenance and following maintenance.
2 periods is continuous.
+ First maintenance: cover concrete surface by humid material to
keep water for concrete.
+ Following maintenance: proceed after following maintenance until
stopping. Watering for concrete surface regularly, times per day
depend on temperature, weather to keep it humid. Maintenance
times last from 5 to 6 days.

Reinforcement concrete column execution method
1. Casing, reinforcement
Reinforcement column belong to system that burden all loading
capacity of work, thus, contractor concern about seriously
1.

Base on size of each structure, contractor uses casing of contractor
as formwork column.
To executing column, contractor gives execution order:
Use Theologize to place centre of pivot
Confirm size of column circumference
Drill and hammer D12 onto edge


Install reinforcement concrete column
Tie steel concrete block
Acceptance for column reinforcement
Combine 3-size formwork of column
Adjust, fix 3-size formwork box on the right position
Adjust straight reinforcement column, block to guarantee
protected layer for reinforcement around column
Clean pivot foot
Combine other size of formwork
Adjust; prop up formwork in the centre of pivot and straight
Acceptance for column formwork
Method of propping up and adjusting formwork column
When pouring the floor concrete, contractor calculate to
place anchor on the floor surface to be point to hook cable.
To control column, contractor estimates to prop up
First line is next to floor surface

Second line is 1.4m from floor
Third line is 50 cm from column
(Base on specific height of each column, contractor adjusts distance
of 2 columns)
To balance force and pull in or pull out easily, contractor uses
column to pull by steel and cable with diameter 8-12mm.


To check vertical of formwork column, contractor equips
plumb bob for each team, combine with survey team to check
straight level of formwork.
The column with the height of more than 1.5m, contractor
arranges concrete door across formwork column so that height of
concrete <= 1.5m. Concrete door is next to the largest. In column
foot, contractor arranges 1 toilet door to clean that.
Contractor install waiting steel to combine wall
After taking quality of formwork column, contractor invites
investor to check and conduct to pour concrete.
Contractor swept a petrol layer to prevent formwork to
absorb cement to untie casing easily.
Concrete column execution
Contractor waters column foot then close cleaning door in column
foot.
a

Avoid separating concrete; contractor pours a yellow sand layer
mortar with rate 1/2 in foot column before pouring concrete.
With high concrete column, contractor pours concrete into many
layers. Thickness of layer <= 40cm. After finishing, contractor
continues to pours other. When stamping, power-hammer is staked

out into previous layer to guarantee separation.
Contractor knocks surrounding casing so that concrete
surface is smooth besides stamping.
To control the height of concrete column, contractor uses
theodolite to confirm stamping bottom. Stamping bottom is used to
pour concrete column. Contractor marks red paint line on the
surface of formwork column as control landmark for height.


Concrete column requirements
After untying casing, concrete surface must be smooth
solid.
Untied column has square sharp, angles aren’t changeable.
Right position for column
Column must be straight
c. Formwork combination notices
If there is any leaky hole, it needs maintaining and preparing
casing.
Reinforcement , casing and concrete floor beam
Execution order this procedure affects to progress and quality of
work. Contractor gives casing execution procedure so that execution
procedure is circulated:
1

Use survey machine to check beam
Install beam untie system
Adjust top column to beam bottom
Install satchel
Cover corrugated-iron formwork as beam formwork
Use survey machine to check or beam bottom

Adjust beam bottom according to design
Check beam bottom casing
Install beam steel
Install formwork into beam
Install column to prop up floor


Cover formwork into floor formwork
Check casing and beam
Install floor reinforcement
Check floor beam casing and floor beam steel installation
Floor beam casing execution
General requirement
Casing and column structure bases on casing structure, commit to
following requirement:
1.

– Guarantee right size and sharp
– Guarantee tight to avoid loss of cement
This affects to execution progress and work quality significantly.
Contractor uses Pal and Minh Khai scaffold casing combining with
wooden formwork so that work gets high quality and execution
process. The system is installed to guarantee the high stability.
These materials are used to execute the following casings:
– The system of propping scaffold combining steel column
constriction.
– The combination between U steel cross bar and wooden satchel.
– The combination among casing corrugated iron and wooden
pressing casing.
* Preparation steps:

– Contractor calculates the height of scaffold which is used for
the propping straight for each girder, floor system based on the
building height.


– Calculate the capacity which presses into wooden satchel in
order to define the height it.
– Define the general height of all materials:




The height of scaffold.
The height of wooden satchel of girder and floor.
The thickness of corrugated – iron formwork.
Contractor arranges the executing formwork team based on
the amount of work.
The system of PAL and Minh Khai scaffold will be put upon the
jack system to adjust height. The foot jack will be put upon the
thick casing to avoid its concentrating force to concrete casing.
Minh Khai scaffold will be used to plaster and build work.
Contractor uses steel bar alternated wooden propping to
ensure safety and right techniques for stair execution.
Contractor will put the parts of materials available in
concrete such as bolt, iron hook… to use for the works of later
parts, pipe other materials following design.
Floor casing is installed by fixing steel casing which connects
to each other to form a large part. The system of casing will be
put upon the system of steel satchel and PAL scaffold.
Adjust the system of casing, floor according to design.

Contractor uses foot jack, top jack of scaffold system which can
be adjusted up and down with the check of measuring devices.
Contractor will organize to take over casing to avoid later
unfortunate mistake before installing reinforcement. The takeover content includes rechecking centre, rod, the height of casing
according to design. Check shape, size, smooth, clean, stability of
casing. Check the stability of casing, scaffold and floor.


Contractor ensures the right time, ensure concrete attain the
right volume and contractor also ensure to have enough takeover note which attain the result.
a

Reinforcement and casing execution
Contractor proceeds installing reinforcement upon the system
of already finished casing right after installing them.
The type of reinforcement will be put at least 45cm high from
the floor and stay in the roof factory area before and after
being curved. Reinforcement must be ensured to be cleaned
before pouring concrete without oil or other poisonous
substance.

Contractor will arrange enough materials, machine which serve for
processing cool curving, installing reinforcement according to design
which is registered by investor and TCVN 8874-91.
Reinforcement work will be processed right at construction and then
installed at right position according to design and located reliably.
Constructor arranges each steel team which is delivered the specific
works with different department.
Floor reinforcement, stair are installed right upon the system of floor
casing. Constructor will install main reinforcement beam right after

installing the system of bottom casing beam. Constructor will install
secondary reinforcement beam outside and then locate at beam’s
design position.
Reinforcement is connected with each other soft steel line (0.81mm) to ensure the stability when pouring concrete. Nut and code
connect surely to straight steel by tying or wielding. Wielding
reinforcement work will be processed according to TCVN 5724-93(VN
STANDARD 5724-93). The wielded beams are suitable with
necessary demand and they will not be crust over and
swollen.
Contractor will cast the concrete mortar


blocks which has the height equal to reinforcement protection
concrete of each structure according to design to ensure the later
pouring concrete work .
Contractor follows all the reinforcement work according to
design notice and investor.
Contractor will invite investor’s technical supervisor to take over and
sign the papers about reinforcement.
a

Floor concrete beam execution
Concrete work is processed right after taking over
reinforcement installation, the take-over documents are complete.
Contractor also does the check of casing system, scaffold to
ensure the stability in pouring concrete process before officially
pouring concrete.
Concrete beam, floor use commodity concrete poured by
pamp.
Contractor calculates to pour each concrete within a day.

Concrete will calculate to guarantee technical demands about
circuit.
Execution circuit and execution circuit method.
Concrete must be stopped pouring according to restriction
about circuit if the pause time of pouring concrete is up to 90min
in any circumstances.
Contractor will commit to TCVN 4453-95 standard about
concrete pouring circuit.
Floor concrete pouring circuit is 1/3 span to the perpendicular
direction to short side and to the pouring concrete direction.
Circuit must have 1mm flexible steel net to connect later
section; it must be blocked so that concrete will not be flown.


After stopping pouring concrete, if the next block concrete is
poured, the circuit contact must be carved roughly and watered
by solid cement, at this point, we use washer water proof and glue
layer. Contractor will pour a mortar layer with rate 1:2 with damp
proof additive.
Notice when pouring concrete contacts with circuit:
1.
Concrete at circuit can not mixed with large rock or in pouring
concrete process rocks are concentrated in circuit, they must be
given away.
2.
Stamping carefully without any mistake.

Concrete pouring method for
floor
Divide pouring concrete part: Concrete part is defined

for each small pour so that the pouring time is not up to 60min
after being finished. This method is to cut concrete pouring work
in order to not be concentrated; therefore, concrete will not be
separated. Moreover, after pouring the later concrete layer, the
previous begins
Pour the floor concrete, contractor applies myriopod method.
When pouring each layer, contractor uses stick to cover in order to
the thickness of concrete is 1 cm bigger than one of floor. Then,
compacting carefully until there is an appearance of concrete
layer .This the time, contractor stops compacting and conducting to
complete the concrete surface.
To confirm the thickness of floor concrete, contractor uses a
stick connected to a bar .The thickness of concrete commits to
standard when when concrete surface meets the bar. Besides
checking method, contractor arranges a survey machine to combine
flat level and high level in pouring
concrete.
Maintenance method after pouring concrete: