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

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

When the precast floor/PC board is processed in the factory, the light point box (junction box) shall be positioned, marked and fixed, and the nozzle of the junction box shall be reserved and sealed.

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

⏵ The factory shall reserve and embed the socket box, switch box and pipeline in the wall/component during the factory prefabrication, And junction box in the floor/PC board.

When the casing is precast on the PC board, the position required by the drawing shall be accurate, and the casing shall be positioned and fixed by marking to ensure that the bottom of the casing pipe is flush and vertical without inclination.

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

The embedded pipeline for site construction shall be in strict accordance with the pipeline direction and the pipeline end designed in the drawing.

① Reservation of junction box in the precast roof The on-site reserved and embedded work completed the pipeline laying and connection work in the cast-in-place platform: the reserved opening of the line pipe at the outer wall panel is connected with the reserved junction box on the top plate, and the connection between the reserved interface of the line pipe on the outer wall panel and the reserved junction box on the top plate is connected with the reserved junction box on the top plate, The openings shall be reserved during prefabrication according to the water supply and drainage design drawings and in combination with the factory process drawings.

⏵ Reserved and embedded work in the factory During prefabrication, only reserved holes on the precast slab of the platform of the water supply and drainage openings are reserved.

② Connection hole between the floor and precast wall.

For example, the water supply and drainage openings in the pipeline well are reserved for the public part of the fire protection pipe openings.

The line pipe shall be arranged and fixed firmly as required and the pipe orifice shall be blocked, And there are reserved pipe connection holes at the root of the wall.

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Let’s take a look at the construction site.

① Reserved water supply pipe slots.

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

The reserved and embedded work site on the site is based on the reserved hole position on the precast slab, Use casing to retain water supply casing in the well, reserve fire water supply casing in the public area, reserve balcony drainage casing, reserve construction engineering Luban Award Appreciation of construction engineering Luban people exchange daily selection, release in the evening, learn and enjoy, and make progress together ↓ Long press to identify and join the alliance ↓.
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When the elevation is consistent with the design, it shall be fixed and strengthened firmly before plugging the hole; The on-site construction is to continue the connection of the condensate hole in the precast outer wall panel, the reserved casing for the hole of the precast composite beam water supply pipe and the drainage hole of the precast slab (PC board).

② Reserved drainage openings in the caisson toilet are reserved for the water supply and drainage openings.

① Reservation of junction box.

② Connection hole between the wall and the floor.

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

After the structural 50 lines are 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.

Example of junction box and conduit in the precast wall.

① Reservation of junction box.

When the electrical conduit passes through the precast beam, the conduit lintel sleeve shall be reserved in the precast beam.

The position of the junction box in the wall shall be reserved according to the position designed in the drawing, Otherwise, there will be conflicts between the ground nozzle and the nozzle in the wall when the precast wall is hoisted, which will affect the later construction.

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

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In this construction mode, how to do the mechanical and electrical reservation and embedment work? During the production of precast components, the factory embeds the wires, boxes, boxes and sleeves in the components such as panel walls and platforms simultaneously, and only connects the pipes of the cast-in-place platform on site.

② Reservation of junction box and connection point in the precast wall.

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.