Method and device for controlling deformation of horizontal beam-slab support structure in reverse foundation pit

Abstract

The invention discloses a method and device for controlling the deformation of the horizontal beam-slab support structure of an inverse foundation pit, and aims to provide a method that can effectively solve the problem of earth pressure on the outside of the foundation pit for the protection piles around the foundation pit or the surrounding retaining walls of the foundation pit. Under the action of the foundation pit, the deformation into the foundation pit is too large, which causes a major hidden danger to the safety of the foundation pit and the safety of the pipeline outside the foundation pit. The method and device for controlling the deformation of the horizontal beam-slab support structure of the foundation pit in reverse operation. It includes the outer protective piles or outer protective walls of the foundation pit and the horizontal beams and slabs arranged in the foundation pit. The horizontal beams and slabs are used to support the water and soil pressure transmitted by the outer protective piles or the outer protective walls of the foundation pit. , the horizontal beam plate is provided with a post-cast belt, which divides the horizontal beam plate into several areas, and the deformation active control device is arranged in the said post-cast belt, and the deformation active control device includes a hydraulic jack and is arranged on the post-cast belt. A plug-in locking support device for transmitting water and soil pressure, the plug-in locking support device includes several plug-in pieces.

Description

technical field [0001] The invention relates to a support structure for a foundation pit, in particular to a method and device for controlling deformation of a horizontal beam-slab support structure for an inverse foundation pit. Background technique [0002] With the continuous development of urban underground space, the plane scale and depth of the basement are getting larger and larger. The newly poured concrete beams and slabs will shrink during the hardening process, and most of the hardened shrinkage of the concrete beams and slabs will be completed in the first 1 to 2 months after construction. When the deformation is restrained, temperature stress will be generated inside the structure. Cracks will appear in the components; in order to reduce the influence of hydration heat during the concrete pouring process of the basement floor, during the construction process, a post-cast belt will be set on the horizontal beam plate of the basement, and the post-settlement belt ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and device for controlling deformation of the horizontal beam-slab support structure of an inverse foundation pit, which can effectively solve the problem of the earth pressure outside the foundation pit surrounding the protective piles or the surrounding retaining walls of the foundation pit. Under the action, the deformation into the foundation pit is too large, which will cause a major hidden danger to the safety of the foundation pit and the safety of the pipeline outside the foundation pit.

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