Method for dismantling and replacing inner support of foundation pit

Abstract

The invention discloses a method for dismantling and replacing an inner support of a foundation pit. The method comprises the following steps that when a steel pipe upright post and a structural beamcollide with each other, section steel with a preset length is embedded in the structural beam, and the section steel and the steel pipe upright post are welded; channel steel is arranged at the bottom of a post-cast strip of a basement floor plate at intervals of preset distances, the two ends of the channel steel penetrate into the portions, on the two sides of the post-cast strip, of the floorplate, and concrete is poured on the post-cast strip; and in the process of symmetrically partitioning and dismantling the inner support, a temporary support is arranged between the floor plate constructed in advance and the steel pipe upright post. The method for dismantling and replacing the inner support of the foundation pit ensures the stability of the floor plate and the structural beam andforce transmission continuity when the inner support of the foundation pit is dismantled, improves the safety stability of the structure, simultaneously improves the construction efficiency and the economic benefit, provides a reference value for dismantling the inner support of the foundation pit, and has wide applicability.

Description

technical field [0001] The invention relates to the field of foundation pit support, in particular to a method for removing and replacing supports in a foundation pit. Background technique [0002] The scale and number of high-rise buildings are increasing day by day. They have the characteristics of many floors, high buildings, large loads, large areas, complex shapes, and increased structural density. It is necessary to set a certain depth of foundation pit on the structure, and to set up a foundation pit on the use. Multi-level basement. During the excavation of the foundation pit, it is necessary to ensure the safety of the underground structure construction and the surrounding environment. Therefore, it is necessary to set up a certain temporary support form in the foundation pit to ensure the stability of the foundation pit and surrounding buildings. The support form in the deep foundation pit During the demolition process, the stress pattern of the foundation pit str...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for removing and replacing supports in foundation pits, aiming to solve the problems of high cost, long time-consuming and poor safety and stability of existing methods for removing and replacing supports in foundation pits

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