1, installation method

Pre-assembly method can speed up the construction and improve the quality of formwork installation, but it must have suitable hoisting equipment and a large assembly site.

(1) Install the doorway template according to the position line, and fix the embedded parts or wooden bricks.

(2) When assembling prefabricated formwork, it shall be put in place and corrected, and then various connectors, supports or temporary supports shall be installed. After the formwork is firmly supported, the hook can be loosened. When the wall is large and the formwork is assembled in several pieces, vertical and horizontal steel beams should be added between the formwork according to the design requirements. When there is no provision in the design, the number and position of steel stare blankly at the joint should be the same as that on the pre-assembled template. The position of the additional steel stare blankly is on both sides of the joint, and the overlapping length with the steel stare blankly on the precast formwork is generally 15% ~ 20% of the total length (width) of the precast formwork, and not less than1m..

(3) When assembling the formwork, the perforated formwork on both sides shall be placed symmetrically to keep the wall bolts perpendicular to the wall formwork.

(4) The spacing between the side ribs of adjacent templates connected by return pins shall not be greater than 300mm, and the joints of pre-assembled templates shall be completely buckled.

(5) Windows and doors hole reserved template should have slope, installation is firm, no deformation, not easy to dismantle.

(6) The setting of tension bolts should adopt different methods according to different tension bolts:

(1) combination bolt-note that the inner rod is screwed into the nylon cap with 7 ~ 8 threads;

(2) Long bolts-set hard plastic pipes to ensure the recycling of bolts or tie rods. The length of plastic pipe should be 2 ~ 3 mm smaller than the wall thickness.

(3) When the small equipment holes reserved on the wall formwork meet the reinforcement, the reinforcement shall be positioned correctly as far as possible, and the reinforcement shall not be moved aside.

(4) The concrete is poured window of the wall template should generally be located at the concrete is poured side. Setting method with column template, horizontal spacing is generally about 2.5m ..

2, the removal of the wall template

A, side form should be removed after the final set of concrete, to ensure that the concrete surface and edges and corners are not damaged (concrete strength is greater than 1n/mm2).

B, template demolition application for examination and approval system.

C, the order and method of template demolition, must be carried out in accordance with the provisions of the distribution board design, follow the principle of first support and then demolition, from top to bottom. When ripping, it is forbidden to use a sledgehammer or crowbar to smash or pry.

D, demolition, the operator should stand in a safe place, so as to avoid safety accidents, after being the block (section) template all dismantled, brigadier general template, accessories, stents, etc. Get out of this pile.

E, dismantling templates, accessories, etc. No littering. Someone should pick it up and put it at the designated place. And do timely cleaning, maintenance and coating isolation agent for later use.

3. Maintenance and storage of templates

(1) After the steel formwork and fittings are dismantled, the bonding mortar shall be removed in time, and the deformed and damaged formwork and fittings shall be mechanically reshaped and cleaned. See Table 4.3.2 for the quality standards of repaired steel formwork and fittings.

Table 4.3.2 Quality Standards for Repaired Steel Formwork and Accessories

Allowable deviation of the project (mm)

The flatness of steel formwork panel is less than or equal to 2.0.

Rib straightness ≤ 1.0.

The straightness of the side ribs shall not exceed the height of the ribs.

Residual deformation of U-shaped clamping mouth of pipe fittings ≤ 1.2

Straightness of steel stare blankly and pillar ≤ L/ 1000

Note: L is the length of steel beam and column.

(2) Formwork and accessories with unqualified maintenance quality shall not be used.

(3) The steel formwork that is not used for the time being shall be coated with release agent or antirust oil. Where the paint on the back falls off, it should be painted with antirust paint and piled up according to the specifications.

(4) The steel formwork shall be stored indoors or in a shed, and the bottom of the formwork shall be padded above 100 mm, and stacked in the open air. The ground shall be smooth and solid, the height of the bottom of the formwork shall be greater than 200mm, and the length between two points and both ends of the formwork shall not be greater than16 of the formwork length. There should be drainage measures on the ground.

(5) Spare parts shall be put into storage, small parts shall be bagged, and large parts shall be classified and stacked according to specifications.

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