thuyet minh bien phap thi cong lap dat nha xuong

CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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TECHNIQUE EXECUTION METHODS
AND
CONSTRUTION WORK PROGRESS

Project: Hanoi sky lake resort golf club
house
Location: Chuong My town- Ha Tay province

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -



PART A
TECHNIQUE AND PROGRESS CONTENT

A.I:EXECUTION METHOD EXPLANATION
A.I.1: INTRODUCTION
Project: Hanoi sky lake resort golf club house
Location: Chuong My town- Ha Tay province
1)

Content of bidding package

Construction work is built on the area of golf court in Chuong My
town Ha Tay province
Work area: Building all the club building
2)

Scale


Architecture solution

- Construction work is 3 floor building and 1 pit floor, concreted
roofing with art tile


Structure solution

- Construction work is designed body structure solution using
column, beam, and 250# reinforced concrete floor


Execution method:

- Construction work is 3 floor building and 1 pit floor, built and
belong to central area, thus, execution method must guarantee
following factors:

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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- Execution method must meet standards about noise, safety,
cleaning and next construction works, ensure not affect to
surrounding
- Transportation means must be cleaned, not dirty tires, no
garbage on the street
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
1) 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.
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
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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,

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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:
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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- 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
2. 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
3. Sewage system
Contractor installs a temporary sewage system, connect
water from many areas and pump water to gas hole.
4. Electricity
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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:
- For equipments and machines
- For other activities
Contractor installs tension pole across roads, wire is larger
than or equal 4 m
5. 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

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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

(receivable

a

border

certificate).

line

Then,

and

investor’s

team

is

standard

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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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, pit floor
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
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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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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- After finishing work, investor checks steel. Contractor only
proceeds to combine formwork if it reaches requirement.
a. 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.
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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
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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.
b. Pit floor concrete wall pouring.


Method

By concrete pump

Concrete is poured on the partition with the thickness of
30cm with many times to guarantee solid and adhesive
degree.


Pit floor wall concrete stamping method

Before pouring concrete wall, contractor uses pump to
water wall foot brick and pour a cement layer with rate ½ and
mix additive for damp-proof. After pouring mortar, pouring
concrete immediately.
Wall concrete has 14cm- landslide, distance between wall
steel is large. Thus, contractor uses stamping machine with
diameter D50, radius is equal as 1/3 as length of power hammer.
When covering next layer on previous layer, power hammer is
staked out with the depth of more than 5cm.


Concrete pour requirements

Avoid changing position of steel, formwork and guarantee
the depth of protected concrete layer.
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG

Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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.
1) Reinforcement concrete column execution method
a. Casing, reinforcement
Reinforcement column belong to system that burden all
loading capacity of work, thus, contractor concern about
seriously
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
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
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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.
b. Concrete column execution
Contractor waters column foot then close cleaning door in
column foot.

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, powerhammer

is

staked

out

into

previous

layer

to

guarantee

separation.
Contractor knocks surrounding casing so that concrete
surface is smooth besides stamping.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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.
2. 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:
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
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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
a. Floor beam casing execution
General requirement
Casing and column structure bases on casing structure,
commit to following requirement:
- 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:
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


- 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.

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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
take-over note which attain the result.
b. 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
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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
(0.8-1mm) 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.
c. Floor concrete beam execution
Concrete
reinforcement

work

is

processed

installation,

the

right

after

take-over

taking

documents

over
are

complete. Contractor also does the check of casing system,
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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:

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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội
Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


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:

Contractor needs to prepare satchel, casing to prevent rain
or sunlight which affects to the quality of concrete
Concrete maintenance is an important part to have stable
concrete and prevent structure surface from split. To
guarantee the quality of concrete, contractor maintain
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CÔNG TY CỔ PHẦN DỊCH VỤ XÂY DỰNG
Tầng 11, Tòa nhà Bắc Hà Tower, 17 Tố Hữu, Quận Từ Liêm, Hà Nội

Tel: 0904.87.33.88 – Hotline: 0912.07.64.66
Web: -


concrete after 7 hours. For the floor, contractor focuses on
damp-proof.
After pouring concrete and complete concrete surface,
contractor prevent work from radiation of the sun according
to requirements and TCXDVN: 318-2004 about maintenance
and concrete structure
Concrete needs maintaining at least 7 days continuously
and watered during that time


Requirements in concrete execution of the work

Before using, contractor gives investor quality certificate
to guarantee no alkali reaction
After designing concrete, contractor gets the sample to
check. Materials with standard is kept in the construction
site to compare with other
In case of the rain, contractor covers against water
Concrete experiment:
After pouring concrete, contractor gets concrete samples
in the work .The sample must have date, month, year, work
name .Each sample group includes 6 pieces.3 pieces have
age of 7 days and 3 pieces of 28 days.
Contractor guarantees experiment equipments in the
construction site and maintains during execution time:
+ Standard screen system

+ Suitable weighbridge, equipments to identify moisture
+ Gauge glass
+ Concrete test equipments:
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