Foundation pit with first support zone having dynamic stress regulation function and construction method of foundation pit

Abstract

The invention discloses a foundation pit with a first support zone having the dynamic stress regulation function and a construction method of the foundation pipe. The foundation pit comprises support,and a stress regulation device is arranged at the position close to the middle of the first support in a disconnected manner; the stress regulation device comprises a top support plate, a sliding bearing and a jack; the top support plate comprises a connecting portion fixedly connected with the upper end of a steel column and a tubular support plate body; the upside of the support plate body is provided with the sliding bearing corresponding to the disconnected first support, and the sliding bearing is used for supporting the first support; the jack is arranged at the position where the firstsupport is disconnected. During construction, the steel column is arranged firstly, the top support plate and the sliding bearing are arranged at the top of the steel column, the first support is broken into two sections when cast, an embedded steel plate is arranged on fracture surface of the first support, and the jack is arranged at the position where the first support is disconnected after first support is completed; the shortcoming of the first concrete support on environmental protection control is overcome, and meanwhile, adverse effect produced from contraction of the concrete supportin the super-large foundation pit can be compensated.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a foundation pit with a first support with a dynamic stress adjustment function and a construction method. Background technique [0002] In recent years, with the rapid development of urban development and construction, the scarcity of urban space and land resources has become increasingly prominent, especially in large and medium-sized cities with developed economies and heavy traffic, including underground space complexes, subway stations, underground garages, underground The construction of various underground spaces including substations, underground pumping stations, civil air defense projects, and street crossing tunnels is in full swing. The foundation pit engineering corresponding to the construction of underground space is facing four major trends: large-scale plane, deep excavation depth, narrow construction site, and close distance to surrounding pr...

AI Technical Summary

Problems solved by technology

However, the current first concrete support cannot apply adjustable dynamic stress through the active head and jack like the steel support, but can only be deformed and compressed inward through the enclosure structure of the foundation pit, and then the concrete support passively bears the transmission earth pressure

This not only sacrifices the effect of controlling the impact on the surrounding environment to a certain extent, but also prevents the danger control intervention through the measures taken for the first support when an alarm occurs in the foundation pit

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