1312-STR-1200梁、柱模板及支架施工方案(英文版).doc

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命运如同手中的掌纹，无论多曲折，终掌握在自己手中
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Construction Method Statement
For Beam, Column Formworks and supporting frames of 1312-STR-1200

1. Scope 3

2. Material 3

3. Construction methods and technical measures 3

1. Scope
The method statement herein is compiled by mainly focusing on installation of column and beam formworks of 1312-STR-1200 and their supporting frames.
2. Materials
1) Plywood (δ=15mm) shall be adopted to precast formworks of beam and column. The wooden board(50×100mm) and the steel tube(Φ48.3×4.0) shall be used to respectively support the inner kneel and outer kneel of formworks
2) The steel tube (Φ48.3×4.0) shall be used to make support of beam and column formworks and to erect scaffoldings.
3) The upright monkey ladder shall be made of aluminum alloy and the planks will be made of steel.
3. Construction methods and technical measures
3.1. To ensure the stability of supporting frames, the concrete pouring of column and beam shall be done separately by three times .The first time of pouring for column shall reach the elevation of 109000mm and the second time of pouring for column shall reach the elevation of 116850.Pouring the for the part of the column above elevation of 116850mm shall be done together with concrete pouring for the beam. The supporting frame of beam formwork shall be connected rigidly to the poured column prior to starting concrete pouring on the beam.
3.2. Method of reinforcement for column formwork.
C1/C1a（sectional dimension 850×750mm）、C2（sectional dimension 750×750mm）5 ways of keels inside each side face of column formwork and double steel tubes with a spacing of 500mm for column hoop. Tie boltsΦ12 with spacing of 500mm installed inside side face. The upper, middle and lower column hoops of column formwork shall be connected to support outside to avoid tilting or inclinedness.
3.3. Methods of reinforcement and supporting for beam formwork. See table 3.1.2.
Table-3.1.2
Code
1GX1/5/6/7/8/9、1B3
1GX2
1GX3
1GX4/1GY3
1GY1/4/5、1B4
1GY2
1B1
1B2
Sectional Dimensions
400×700
700×1100
700×1350
500×1000
400×600
650×1000
600×900
750×900
Formwork of bottom of beam
Inner keel of formwork
（line）
3
5
5
4
3
4
4
4
Spacing between outer keels of formwork(m)
0.45
0.6
0.6
0.6
0.45
0.5
0.5
0.5
Support on the bottom of beam
Spacing of posts
Two sides of formwork(m)
0.9
1.2
1.2
1.2
1.0
1.2
1.2
1.2

Span of beams (m)
0.9
0.6
0.6
0.6
0.9
0.5
0.5
0.5

Bay of posts(m)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5

Bearing post additionally fitted on the bottom of beam（line）
0
2
2
1
0
1
1
1
Side formwork of beam
Inner keel of formwork
（line）
4
5
7
5
4
5
5
5

Outer keel of formwork(line)
Spacing（m）
0.9
0.6
0.6
0.6
0.45
0.5
0.5
0.5
Tie Bolt
Diameter
12
16
16
12
/
12
12
12
H（m）
0.3
0.5
0.6
0.5
/
0.4
0.4
0.4
l（m）
0.9
0.6
0.6
0.6
/
0.5
0.5
0.5
Note: “H” indicates the distance from tie bolt to the bottom of beam. “I” indicates the spacing on the direction of beam spans. The upper parts and lower parts of beam formwork shall be connected to the support tightly by steel tube couplers.
3.4. Procedure and requirements for erection of supporting frame.
1)Procedure of erection： Place base plate(board) with a thickness of 50mm→ Erect base lift → Connect the post and base lift by couplers →Install the first runner and bearer and connect them to the post tightly with couplers → Repeated the last step → Erect cross bracings →Lay steel planks.
2). Lay the base plate (base support) and place the base lift as per the priorities of beam locations. The longitudinal base lift shall be fixed to the post with right angle couplers and the post shall be not more than 200mm to the bottom of steel tube. However, the transverse base lift shall be fixed to the post with right angle couplers and the post shall be close to the underneath of longitudinal base lift.
3) The posts shall be erected as per the sequence of positioning. The posts shall be connected and fixed to the longitudinal and transverse base lifts. For erection of posts, the joints on each lift height shall be pair joint couplers (except for the top height lift) and ensure that the pair joints on the same section shall keep some space (50% of the sectional size)
4).The bearer shall be set on the inner side of the post and the length of single post shall be not less than 3 bays. The bearer shall be connected by pair joint couplers and conform to the following rules: the ends for connection of two adjacent bearers shall not be set in the same bay or same lift height. Any two adjacent connection joints not in the same bay or lift height shall keep a distance of not less than 500mm on the horizontal direction. The distance from each joint centre to the nearest main joint shall be not more than 1/3 of the longitudinal spacing.
5).The connection between runner and bearer on the bottom of beam formwork shall be connected to the post by double couplers.
6).Add one bearer in the middle of two bearers on the top lift of supporting frame. The top of the bearer shall be tightly to the surrounding framed supports.
7) The erection of cross bracing: the cross bracings shall be erected along with the scaffolding structure. The bracings on the bottom lift shall be all supported by the base plate. The method of lap joint shall be adopted for bracings ‘connection. The length of lap joint shall not be less than 1m and fixed by 3 rotating couplers. The distance from the edge coupler’s cover on the top to the top of the post shall be not less than 100mm.The bracings shall be fixed to the extended part of runner or the post by rotating couplers. The central line of rotary coupler shall keep a distance of not more than 150mm to the main joint.
8). Rigid connection shall be done in every 3 meters vertically between the formwork support, scaffolding and the column of the frame around which the construction work has been completed.
9). Cross bracings shall be erected respectively on the ends of outer sides , corners and the central vertical face with a distance of less than 15m of the scaffoldings .The sequence of cross bracing erection shall be from the bottom to the top. The width of cross bracing is 6m, which makes an angle of 45°~60°with the ground.
10) .The wall fasteners of the scaffoldings shall be laid out horizontally close to the main joint as per the rule of “two lift heights and three bays”. The distance between fasteners and main joints shall be not more than 300mmm.
11) .Planks shall be fully laid on the working platform with sound firmness and tied with steel wire #14 on three runners. Both ends of the scaffolding planks shall be reliable and fixed so as to prevent capsizing.
12) .Guardrails: Erect two-line guardrails above the working platform and the upper line of guardrails (top rail) shall be 1.2m tall while the mid rail shall be set in the middle line of the lift height. Toe boards shall be erected with a height of 180mm to the platform.
1) Access for going up and down：Place 1 set of upright monkey ladder respectively on the southwest corner and northeast corner of scaffoldings. A rest platform shall be erected at the height of 4.5m of the upright monkey ladder.
3.5. Dismantling of supporting frame.
1).The technician shall conduct a technical disclosure for all the working crew members who are going to perform dismantling work prior to commencement of dismantling work and all the attendees are required to sign on the written form of this said technical disclosure.
2). Arrange the power cables properly before dismantling the supporting frame. For the cables that cannot be dismantled or put aside, they shall be buried by soil.
3). Barricade the area with rope or warning tape prior to starting dismantling work. The work can be started only in the presence of watchman, HSE personnel and foreman.
4) During dismantling the scaffoldings, the workers must wear harness and be equipped with tool bag. The workers shall not hold the steel tube and wrenches simultaneously .The tools shall be kept in the tool bag after use.
5).The procedure for dismantling scaffoldings: From the top to the bottom, opposite to the sequence of erection. The general sequence for dismantling: guardrails→scaffolding planks→ cross bracings→runner→bearer →post→ posts passed onto the ground→couplers removing→ dismantled parts stacking and storing as per the specifications.
6) Someone shall be appointed for monitoring the dismantling work for structural form of scaffoldings .The crew members shall acknowledged with their respective given duties and work under united instruction .The working platform shall be with enough space
7) It is not allowed to dismantle a vertical platform from 2 different points or from 2 different lift heights at the same time .Do not move to the next one until the last one has been completely dismantled. If the dismantling is being done at 2 different positions of the scaffolding system, the height different shall be within 2 lift heights so that the stability of the structural form will not be destroyed.
8) The wall fasteners shall be dismantled along with the scaffoldings lift by lift. It is not allowed to dismantle the wall fasteners of the whole lift before dismantling the scaffoldings. When the dismantling of scaffoldings has come to the height of last post remaining (Approximately 6.5m), the wall fasteners shall be dismantled when temporary bracings have been erected and strengthened at suitable locations.
9) The dismantling work of long post or runner (bearer) shall be done by two workers in case any undesirable incident occurs
10) The workers cannot sit on the scaffolding platform being dismantled or any unsafe place during taking the break. Horseplay is also strictly forbidden during dismantling the scaffoldings.
11).The dismantled post or any component part shall not be thrown causally .Instead, the dismantled parts shall be dropped down with being tied to the solid rope and stacked as per their categories.
12).The workers can be permitted to leave the workplace only when it has been confirmed by appointed personnel that this workplace is free from any potential hazard.

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你一定要坚强，即使受过伤，流过泪，也能咬牙走下去。因为，人生，就是你一个人的人生。
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命运如同手中的掌纹，无论多曲折，终掌握在自己手中
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