The position of the line box in the wall shall be reserved according to the position designed in the drawing, Otherwise, there will be conflict between the ground pipe orifice and the pipe orifice in the wall during the hoisting of precast wall, affecting the later construction.

When the electrical conduit passes through the precast beam, reserve the conduit lintel sleeve in the precast beam.

The precast floor / PC board shall be aligned with the light position box during factory processing (junction box) positioning, marking, fixing, reserving and sealing the junction box nozzle.

When the casing is in the precast wall, it shall be scribed and positioned according to the design elevation after 500mm of the building structure construction is determined, and the casing shall be placed to review the elevation.

Examples of junction boxes and conduits in the precast wall ① reservation of junction boxes ② connection holes between floor and precast wall ① reservation of junction boxes ② connection holes between wall and floor conduits in the public part.

After the structural line 50 is determined, the junction box in the wall shall be fixed on the reinforcement in the wall according to the elevation designed in the drawing and fixed firmly, and the wiring pipes shall be arranged as required The pipe orifice shall be firmly fixed and blocked, and the pipe connection hole shall be reserved at the root of the wall.

When prefabricating the PC board, the position of the casing shall be accurate according to the requirements of the drawing, and the casing shall be scribed and fixed to ensure that the casing pipe bottom is flush and vertical without inclination.

If the pipeline direction is changed, it will affect the pipeline direction on the precast wall and precast slab and bring many inconveniences to the construction.

Reserved holes for junction boxes and connection points in the precast wall ① reservation of junction boxes in the precast roof ① reservation of conduit orifices in the external wall hanging plate Schematic diagram of connection between reserved external wall pipeline and platform cast-in-situ layer pipeline ➤ field reservation and embedding work; pipeline laying and connection in the cast-in-situ platform shall be completed on site: the reserved opening of line pipe at the external wall plate shall be connected with the reserved junction box on the top plate, The connection between the reserved interfaces of the top plate junction box, the reserved opening of the line pipe of the outer wall plate and the reserved junction box of the top plate, the connection between the reserved junction box of the top plate, the precast wall of the second water supply and drainage reserved embedded cast structure and the reserved water supply and drainage opening on the precast PC board shall be reserved according to the water supply and drainage design drawings and in combination with the process drawings of the factory.

➤ factory reservation and embedding.

The factory prefabrication and processing is the same as the on-site embedded construction.

For example, the water supply and drainage holes in the pipe shaft are reserved for public parts, and the fire pipe holes are reserved ① reserved for water supply pipe grooves ② reserved for drainage holes, the water supply and drainage holes in the sink type toilet are reserved for balcony drainage holes, and the drainage holes in the air conditioning board are reserved ➤ The on-site reservation and embedding work site is based on the reserved hole position on the precast slab, and the casing is used to continue the pipeline.

The pipeline direction and the position of the end socket box and excessive socket box shall not be changed at will.

➤ reservation and embedding in the factory.

The construction site is to reserve the pipe orifice from the reserved junction box in the PC board to the precast wall junction box, as well as the pipeline connection between each junction box.

Precast building construction has become a technology that industry personnel must master.

Let’s take a look at the construction site.

The water supply casing in the well is reserved, the fire water supply casing in the public area is reserved, and the balcony drainage casing is reserved..

Reservation and embedding in the factory Socket boxes, switch boxes and pipelines in walls / components, And junction boxes in the floor / PC board.

Under such a construction mode, how to do electromechanical reservation and embedding? During the production of precast components, the factory embeds the wires, boxes, boxes and casings in the components such as plate wall and platform at the same time, and only the pipeline connection of cast-in-situ platform is carried out on site.

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First, be familiar with the drawings, and then arrange the pipes reasonably to make them beautiful and neat.

the socket box, switch box and pipeline in the electrical reserved and embedded precast wall / component shall be reserved in the factory and the interface shall be reserved.

During factory prefabrication, only reserved holes on the platform prefabrication plate of water supply and drainage holes are reserved.

When the elevation is consistent with the design, it shall be fixed and reinforced firmly, and then the hole shall be blocked; The on-site construction is to continue the connection of condensate holes in the precast exterior wall slab Reserved casing and precast slab for hole of precast composite beam water supply pipeline (PC board) continuation of drainage holes.

I.

The embedded line pipe for on-site construction shall be in strict accordance with the pipeline direction and the end of the pipeline designed in the drawing.