Basement shear wall post-pouring belt precast external mold construction method

Abstract

The invention discloses a basement shear wall post-pouring belt precast external mold construction method. The basement shear wall post-pouring belt precast external mold construction method includesthe steps that S1, after a basement shear wall is subjected to mold removal, virtual edge laitance at the position of a shear wall post-pouring belt is gouged and cleaned up, then a concrete precast mold plate is installed, a reserved water stopping screw is connected with a shear wall post-pouring belt reinforcement in a welded mode, gaps and internal corners between a precast block and the shearwall are sealed, a waterproof additional layer coiled material is pasted to the outer side of the precast block, and a protective mortar layer is arranged on the outer side of the waterproof additional layer coiled material; S2, the precast block is prefabricated; S3, installation control lines are formed through a chalk line at the two concrete adjacent sides of the shear wall post-pouring belt,and the precast block is installed according to the positions of the control lines when being lifted; S4, the precast block is lifted; S5, fixing is carried out, specifically, cement mortar bedding is performed on the lower part of the precast block, the precast block is lifted, and the pre-embedded water stopping screw and the shear wall reinforcements are welded and fixed; S6, the waterproof coiled material construction is carried out; and S7, masonry is protected. The basement shear wall post-pouring belt precast external mold construction method is widely applied to construction of the basement shear wall post-pouring belt for buildings with foundation pits.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method of prefabricated external formwork with post-cast belts for basement shear walls. Background technique [0002] In the design of high-rise buildings with basements or buildings with super-long basements, in order to prevent the influence of harmful cracks that may be caused by uneven shrinkage or uneven settlement of cast-in-place reinforced concrete structures, the structure of beams, slabs (including foundation floors), walls, etc. The concrete belt with a certain width and poured after a certain period of time is reserved in the middle, which is called the post-casting belt after construction (referred to as the post-casting belt). The post-cast belt left in the basement is the key part of the construction control, and the construction period is long ("Technical Regulations for Concrete Structures of High-Rise Buildings JGJ3--201...

AI Technical Summary

Problems solved by technology

Usually, the basement shear wall post-cast belt is to wait for the concrete on both sides to reach the specified time before constructing concrete, waterproof, protective layer and other processes, which increases the construction period, affects the backfilling time of the foundation pit, and increases the risk of safe construction of the foundation pit

Moreover, the construction period is long, and the sundries and sewage in the foundation pit are very easy to pour into the basement and the basement post-pouring belt from the post-pouring belt, which increases the difficulty of basement construction and affects the construction quality of the post-pouring belt.

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