Biện pháp thi công xây tường dự án Feliz En Vista

Atdry area, the kicker wall is plastered 01 cement layer + 01 mortar layer+ 01 brick line →masonry layer by layer →finish rebar work and pour concrete for lintel → construct the remain

Form FEV-RFI-V1.1

Project : Feliz-En-Vista High-Rise Residential Development

Address : At Plot Y1, Thanh My Loi Ward, District 2, HCMC, VN

Package : Main Contract

Employer : CapitaLand- Thien Duc Investment Co., Ltd.

REPLY:

Signed:

Approved with comments but works can proceed on site

This review is for conformance with the general design concept and for general arrangement expressed in the documents Review shall not be construed to mean that the reviewer accepts the detail calculations and dimensions shown in the shop drawings or any deviation from the requirements of the contract documents Contractor is responsible for errors or omissions in the shop drawings; for meeting all requirements of the contract documents; for confirming and correlating job site dimensions; for information that pertains solely to fabrication process or to techniques of construction, and for the coordination of the work of all trades It is understood that the notation on the submittal is not to be construed as an authorization for additional work or additional cost.

Date to Reply 11-Dec-17

We would like to submit Method statement for masonry.

Dear Sirs,

Method statement for masonry

REQUEST FOR APPROVAL (RFA)

To

VINAQS CO., LTD ;

RSP ARCHITECTS PLANNERS &

ENGINEERS (Vietnam) LTD

From: CSCEC32 Main Contractor

Attention Dang Thanh Sang; Mai Tran Bich Tram Name:

R Critical (03 days) Norm al (07 days)

RSP comments- 7 Dec 2017:

-Noted CSCEC32's adjustments clouded in red color from RFA-003D to RFA-003E

-Decision "Approved with comments" given dated 2 Dec 2017 for RFA-003D is

still valid for RFA-003E with the following comments:

1 MOS of masonry works shall be read in conjunction with relevant shop drawings

and the approved Materials info

2 Demonstration for masonry works shall be done at mock up unit, recorded in

photos for every step of the work process and submitted to Architect for record

3 Detail comments refer to following pages

Le Dinh Luong

MOS for Masonry

PROJECT: FELIZ EN VISTA HIGH-RISE RESIDENTIAL DEVELOPMENT ITEMS: BLOCK A, BLOCK B, BLOCK C, BLOCK D & PODIUM

OWNER

Capitaland- Thien Duc Investment Co., Ltd

CONSULTANTS RSP, Tham&Wong

VIETNAM CO.,LTD

Content

Chapter 1 General 1

Chapter 2 Main construction method 1

Section 1 Operation condition 1

Section 2 Material 2

Section 3 Technology process and method statement 4

Chapter 3 Masonry Precautions 14

Chapter 4 Masonry detail 16

Chương 2 - Chapter 2: Phương án thi công chính- Construction method

Phần 1 - Section 1: Điều kiện thi công - Operation condition

tác xây tường

1 Structure for masonry location need inspecting and handover to masonry teams

2 Clean clearly and keep flat

3 Set out benchmarkon R.C walls and columns at level 1m, these marks will apply

for checking and inspection

4 Check construction level for the first brick course

2

5 Make wet the structure surface masonry location before constructing 1-2 hours

Phần 2- Section 2: Vật tư -Material

1 Burnt bricks – AAC bricks – Concrete bricks：

- Masonry materials: tensile strength must meet the design requirements There are

enough available conformity of certificates and test reports When materials come into site,

we have to check their COCQ document and do sampling When passing the test, materials

can be used for construction Do not throw or dump Burnt bricks - AAC bricks – Concrete bricks in the loading and unloading process

- After entering site, Burnt bricks - AAC bricks – Concrete bricksare arranged following types and dimension at dried area They have to keep away from inclement

weather, chipping or damage

- The wet AAC bricks and concrete bricks will not be used until havingbeen dried

Arranging bricks height do not exceed 2m Material must be covered by plastic sheets in

rainy days

3

nơi cần sử dụng rồi mới cho nước vào hỗn hợp vữa khô và trộn kỹ lại trước khi thi công và sử dụng trong vòng 1h tính từ thời điểm cho thêm nước vào hỗn hợp vữa khô Tỉ lệ nước phải tuân theo chỉ dẫn của nhà sản xuất xi măng đã được phê duyệt, nếu trộn ướt tỉ lệ là 1xi măng:

3 cát: 1,03 nước

chỉ cần cho thêm nước vào trộn kỹ lại trước khi thi công Theo chỉ dẫn của nhà sản xuất thì 1 bao vữa 25kg ta phải trộn với khoảng từ 6~7 lít nước sạch

là nước sạch lấy từ đường ống chính

2 Mortar:

- The mortar for this project is ready-mixed mortar by machine and compressive

strength should be minimum 7.5MPa

- Mortar is a mixture include cement and sand, has to be mixed dried by machine It

will be transported to the construction area and added water before using This mixture has

to be used within 01 hour from adding water Water ratio should be followed instruction of

app roved cement’s manufacturer, if mixing wet the ratio will be 1 cement: 3sand: 1.03 water

- Special mortar for AAC brick is ready-mixed and packed, It will added water and mixed carefully before using Follow manufacturer’s instruction, 1 bag 25 kilo mixes with 6~7 litter running water

- Cement and sand have to be measured by the same bucket and used water is running

water

- Sand for masonry (take from river, not have clay and other impurities) shall be clean

- Burnt brick: 02 hole (40 × 80 × 180mm) & 04 hole (80 × 80 × 180mm)

- AAC brick: 600×200×200mm&600×200×100mm

- Concrete brick: 390×190×190mm&390×190×90mm&180x80x40mm

Phần 3 – section 03: Quy trình và phương án thi công - Technology process and

method statement

1 Quy trình xây tường - Construction process:

chân tường (khu vực ẩm ướt và khu hộp gen kỹ thuật), Còn chân tường ở khu vực khô ráo

Prepare → Clean the floor → Set out for wall location → Set uptie rebar, stiffener, kicker wall (wet area & technical pipe box) → pourconcrete kickerwall (wet area&technical pipe box area) Atdry area, the kicker wall is plastered 01 cement layer + 01 mortar layer+

01 brick line →masonry layer by layer →finish rebar work and pour concrete for lintel → construct the remain layer at above →pour concrete stiffener

2 Phương án - Method:

đầy đủ về công trường

5

- All materials related to the masonry work (such as bricks, cement, sand, water, mortar,

ration mortar ) must be approved by consultant and delivered enough into the site

- The worker must be skill and well-equipped masonry tools

- Before doing masonry, clean the floor and keep construction surface even

- The day before beginning masonry work, masonry location for burnt and concrete

brick should be moisture to increase effect of connection between brick and concrete slab

- In case there is pipeline through the wall, locate position and dimension of opening

holes

- Before constructing burnt bricks, make wet And AAC bricks and concrete bricks shall

not be wet and need cleaning the dirt on surface

cấu)

ở cao độ +1mso với nền hoàn thiện trong phòng khách để dễ dàng kiểm tra khi thi công và

6

- Tools:

+ Total station: use fordefine benchmark and determine axis line (set up in the

structural period)

+ Laser instrument: use for transfer axis line from the lower floor to the upper floor

(set up in the structural period)

+ Theodolite: use forlocate axis line on the floor (set up in the structural period)

+ Automatic level: use forlocate level

- The surveyor uses the automatic level to locate the mark line on the wall / column at

level + 1m from FFL of living room to check within inspection period

- Base on the mark line to locate wall position, the wall position is 02 parallel lines be

the same width with wall At door position, there are 02 lines be the same width with wall

and 02 diagonals And the position of stiffener, there are 02 lines be the same width with

stiffener and 01 diagonal

- Check and inspect surveying work, marking the position of walls, doors, windows,

stiffener, holes, opening of walls before construction

7

thép có đường kính 6mm, dài trung bình 460mm, được cách nhau tối đa 400mm Một đầu

- Stiffener should be installed at both sides if bricks wall near by window / door less

than one full brick Stiffener should be installed from both sides of double door and

connection of different bricks

- If masonry brick exceeds 5000mm length and/ or 4000mm height, provide vertical

and/or horizontal stiffener to connect structure part

- The junctions of concrete column and wall will be anchored tie rebar with 6mm

diameter, 460mm length and distance from each tie rebar is 400mm One side of tie rebar

will be embedded into the concrete wall with 60mm length and tie rebar need putting into

mortar joint After embedding 24 hours, we can proceed the next step

bê tông sàn

- Kickerwall concrete is the same width with wall at wet area (toilet, bathroom…), Technical pipe shaft andpowder room It should be 150mm higher than structure surface

Concrete grade is the same with slab concrete

- Kicker wall at dry area is plastered 01 cement layer + 01 mortar layer +masonry 01

brick line

8

* Gạch đất nung - Burnt brick:

- Construct the first course with 10mm thickness mortar

- Masonry one by one The vertical mortar joint shall alternate between two layers, set

out at the middle of below bricks and be sure the alternate location is not less than 25% of

brick length

- Mortar joint has to be full mortar

- For burnt brick wall with 180mm thickness, every 5 layers shall be built in the

horizontal direction and we need to construct 1 layer in vertical direction

- As constructing near the bottom of the beam, leave a space with 200mm height along

the wall This space will be filled within 07 days after finishing masonry work Bricks for

this location arranged 45 o -60 o in vertical direction have to be filled with enough mortar

10mm để tạo mối liên kết khi trát

- The mortar joints will be raked into 10mm depth compare with brick surface to make

connection

9

200mm

- In construction process, the mortar horizontal joint will be reinforced by wire mesh

with at every 4th courses of brick wall and start from second course Wire mesh 65mm is

used for brick wall 100mm and wire mesh 165mm is used for brick wall 200mm

- For exterior brick wall, prevent brick hole turning outside If brick hole turns outside

in unavoidable case, we use mortar to fill (mortar scale 1:3)

* Gạch AAC – AAC brick:

- Use the water ruler, wire rope installation and alignment for the boundary off the

surface of the wall coincide with the ink of the survey

- Apply normal mortar (mortar 1cement:3sand) thickness about 1 ~ 2cm at the foot of

the wall to create a flat surface, the mortar width is larger than the wall thickness of 5cm

each Check the flat

tiên

- When the normal mortar is dry, use a special mortar planer to lengthen the joint of

the brick and then place the bricks, in the same order for the first layer

(theo chỉ dẫn của nhà sản xuất gạch AAC được duyệt)

(according to instruction from the approved AAC brick's manufacturer)

10

- Masonry one by one The vertical mortar joint shall alternate between two layers, set

out at the middle of below bricks and be sure the alternate location is not less than 25% of

brick length

- Makes sure joint be always full mortar

bơm vào đầy khe bằng cách trong lúc bơm nhìn thấy foam tràn ra ngoài khe

- As constructing near the beam bottom, leave a joint with 20mm width along the wall

This space will be filled within 07 days after finishing masonry work This joint must be

filled by pumping Polyfoam into until overflowing

- The mortar joints will be raked into 10mm depth compare with brick surface to make

connection

* Gạch bê tông - Concrete block:

- Construct the first course with 10mm thickness mortar

- Masonry one by one The vertical mortar joint shall alternate between two layers, set

out at the middle of below bricks and be sure the alternate location is not less than 25% of

brick length

11

- Make sure joins be always full mortar

- As constructing near the bottom of the beam, leave a space with 200mm height along

the wall This space will be filled within 07 days after finishing masonry work The concrete

brick fill this space has dimension 40x80x180mm and is arranged 45 o ~60 o in vertical

direction have to be filled with enough mortar

- The joints in works will be raked out to 10mm depth with external surfaces of brick to

provide a key for plaster

200mm

- In construction process, the horizontal mortar joint will be reinforced by wire mesh

with every 2 courses of brick wall and start from second course Wire mesh 65mm is used for

brick wall 100mm and wire mesh 165mm is used for brick wall 200mm

- The holes of concrete brick cut pieces where applicable will be infilled with motar to

enhance its bonding to the adjacent brick

12

13

- Wire mesh and fiber mesh close on the brick at connection area of column and

concrete wall or two different types of wall Mesh with 200mm width will be arranged along

connection

- Wire mesh is used for burnt brick wall and concrete block wall, and fiber mesh is used

for AAC block wall

+Clear concrete wall surface by wire brush to clean dust, oil, remain formwork, mortar,

grease and laitance

đóng giữ lưới vô tường với khoảng cách tối đa là 1m

+Fasten mesh on the wall by patch and adhesive or nail and washer, maximum distance

from two meshes is 1m

14

Chương 3 - Chapter 3: Lưu ý trong công tác xây gạch- Masonry Precautions

bricks after putting mortar Cut pieces of brick/ concrete block should not be

less than 150mm in length

được sắp thẳng hàng trong suốt quá trình thi công Vệ sinh và làm sạch sau khi

dimension All horizontal and vertical mortar joints shall be evenand

straight during construction, clean clearly after finishing masonry work

be located at joints and its length shall conform to this method requirement

After finishing burnt brick and concrete brickmasonry, water for maintainance

which should last at least 5 days to avoid any problem caused by high

temperature

được bảo vệ khỏi thời tiết khắc nghiệt, vỡ hoặc bị hỏng

- Burnt bricks, concrete bricks and AAC bricks shall be arranged overlay and

protected from inclement weather, chipping or damage

Brickwork shall be built in even stages and no part of the work is to be carried out more than one meter higher than adjoining sections of the same wall or walls bonded thereto

tường xây phải theo đợt và mỗi đợt không cao quá 1m so với đợt trước cho cùng 1 bức tường

15

đỉnh của tường sẽ được bao phủ bằng bao bì, tấm bạt, hoặc vật liệu phù hợp khác

- During construction, walls and top of wall shall be protected from heavy rain

by canavas or suitable coverings

được dỡ xuống khu vực khô và phải được bảo vệ khỏi bị ướt Khối gạch bê tông

đã trở nên ẩm ướt sẽ không được sử dụng cho đến khi chúng khô để giảm sự co

- Concrete bricks and AAC bricks delivered to site shall be arranged in dry area

and protected from becoming wet Wet concrete bricks shall not be used until

being dried

Special tools for AAC bricks masonry