The concrete pouring of the laminated slab is formed.

Pre embedding of internal line box and line pipe of precast external wall components in PC factory.

(4) the depth of the straight pipe entering the foam block should be half the length of the direct head and firmly fixed with the foam block.

During the production of stair component in PC factory, fix the line box on the PC component mold according to the line box position of detailed design, and match the connected line pipe to the exit surface of stair according to the detailed design, Reserve handhole, reserve direct head in the handhole, the depth of the handhole is 5cm, and the direct head is close to the ground of the handhole.

2.

(5) During concrete pouring, it is necessary to send personnel to inspect whether the wired pipe is damaged on site, and if so, repair it in time.

The depth of the handhole mold into the concrete layer of the laminated plate is 3 cm, and then spot weld the handhole mold on the steel baffle of the formwork.

4.

For on-site piping connection, the PVC line pipe shall be laid on the laminated plate according to the direction of the pipeline, resulting in the corresponding position of the floor slab.

Key points of quality control: (1) when deepening the design, the pipelines of each system shall be comprehensively arranged to reduce pipeline crossing and ensure that there is only one layer of pipeline in the cast-in-situ layer as far as possible; (2) The interface of the line pipe out of the floor shall be blocked; (3) During concrete pouring, it is necessary to send personnel to inspect whether the wired pipe is damaged or protrudes from the pouring completion surface, and repair it in time.

After the lifting of the on-site piping connection on-site laminated plate is completed, the line pipes to be connected in the two connected laminated plates shall be connected with PVC short pipes of the same model in the handhole.

For port protection, wrap the PVC conduit port on the floor with adhesive tape to play the role of sealing protection.

3.

Taking the construction technology of China Construction Third Engineering Bureau as an example, this paper takes a look at how to cooperate with the assembly type and aluminum formwork for embedding? Overall idea: when the precast house uses the laminated plate, in order to avoid the damage of the embedded line pipe of this floor by the nail of the indoor decoration of the upper and lower floors, it is considered to arrange the indoor electrical embedded plane line pipe of this floor in the laminated plate of the roof of this floor or the cast-in-situ layer of the floor of this floor; The socket installed in the precast exterior wall and the line pipe of the switch box are led upward and connected with the reserved pipe in the laminated plate; The socket and other wire boxes installed on the indoor rear pouring wall or rear masonry wall can be led down as required to connect with the wire pipe in the floor cast-in-place layer.

When fixing the handhole mold, first locate the position of the handhole mold.

After the concrete curing is completed, the formwork shall be removed and the pipeline shall be cleaned.

Where crossing cannot be avoided, route boxes shall be set to ensure that there is only one layer of line pipes in the laminated plate; (2) In order to prevent the laminated plate from cracking due to the layout of the line pipe, it is advisable to add a tie bar perpendicular to the line pipe above the line pipe across the laminated plate to ensure the strength; (3) When the wire box in the laminated plate is embedded, it shall be firmly fixed on the formwork without offset; (4) During the production of laminated board, the connecting conduit of wire box must be connected with lock nut and blocked; (5) The direct head of PVC conduit shall be reserved at the conduit port in the hand hole of laminated plate and blocked; (6) The depth of conduit handhole into the surface layer of the laminated plate shall be controlled within 3 cm, and the deviation shall not be greater than 5 mm; (7) foam plates should be used to seal the holes in the laminated plates.

Lifting Eye Anchor

2.

The line pipe shall be laid from under the truss reinforcement on the laminated plate.

After the on-site laminated plate is hoisted, mark the pipeline direction and the position of the line pipe out of the floor on the laminated plate according to the layout of the pipeline in the electromechanical construction drawing.

5.

The distribution line pipe in the truss reinforcement of the laminated plate shall be connected with the junction box and hand hole.

Key points of quality control: (1) during detailed design, the line pipes of each system shall be comprehensively arranged to reduce pipeline crossing.

After the pipes in the laminated slab and the reinforcement binding are completed, the concrete pouring shall be started.

The pipe entering the lintel is bent parallel to the structural plane and slightly exposed according to the form of b-bend..

The piping in the laminated plate shall be designed according to the drawing of the laminated plate.

Pipeline direction identification.

2.

During the production of precast external wall components, the line box shall be fixed on the PC component mold according to the line box position of detailed design, and the line pipe shall be laid in the reinforcement interlayer of precast wall according to the line pipe direction, About 5 centimeters thick foam block is left at the end of the upward wall, and a direct head is inserted into the foam block, and the position is fixed at the middle part of the wall end.

Fixing of line pipe: bind the laid line pipe with iron wire and truss reinforcement to play a fixing role.

4.

With the rapid promotion of cast and aluminum mold technology, the embedded construction technology of electromechanical cooperation with civil engineering is also different.

Construction process flow of connection between precast external wall and floor line pipe: pre embedding of internal line box of precast external wall components → key points of on-site piping connection: 1.

3.

2.

Key points of quality control: (1) when embedding the inner box of precast exterior wall components, it shall be firmly fixed on the formwork without deviation; (2) The outlet end face of the inner line pipe of the precast exterior wall component shall reserve the direct head of the PVC line pipe and block it; (3) the foam blocks placed on the top of the precast wall should be closely attached to the top surface of the outer wall, but not to the interior surface of the outer wall, and the spacing should be kept above 5 cm.

Fixation of junction box: spot weld the steel sheet with matching size in the junction box on the steel formwork according to the position of the junction box in the detailed design, and the junction box is sleeved on the steel sheet to prevent front, rear, left and right deviation, The upper part of the junction box is welded and fixed on the grid frame with reinforcement to prevent up and down deviation.

The wiring pipe is embedded in the front room floor, and the wiring pipe is reserved in the front room floor of the staircase.

Process flow of concealed embedding of line pipe in precast stair platform: reserved line box and line pipe in stair component → reserved line pipe in front room floor → key points of cross lintel pipe connection operation: 1.

Construction process of embedded conduit in laminated plate: fixation of junction box → fixation of hand hole mold → piping in laminated plate → concrete pouring of laminated plate → key points of on-site piping connection: 1.

4.

Construction process of piping on the laminated plate: pipeline direction identification → on-site piping connection → line pipe fixation → port protection → concrete pouring inspection operation points: 1.

3.

Reserved line box and line pipe in stair component.

2.

After the on-site piping is connected and the on-site laminated plate is hoisted, the on-line pipe of the laminated plate is connected with the line pipe led up in the precast wall through the reserved direct head.

1.

The direct head inlet joint shall be reserved at the hand hole, and the depth of the hand hole is about 1 cm.