Deep pit supporting structure in foundation pit and construction method thereof

Abstract

The invention discloses a deep pit supporting structure in a foundation pit and a construction method thereof. The method comprises the steps that on the basis that construction of engineering piles for supporting a foundation pit bottom plate is completed, a deep pit area is excavated, the engineering piles in the deep pit area are broken, and an uphill line of the deep pit area and the engineering piles outside the deep pit area are reserved; and the reserved uphill line of the deep pit area and the two rows of engineering piles in the opposite outer rows are tied through tie bars, concreteis poured, a reinforcement cushion layer is formed, and the uphill line and the tops of the two rows of engineering piles in the opposite outer rows are tied into a whole. According to the method, theuphill line of the deep pit area and the tops of the two rows of engineering piles in the opposite outer rows are tied through the reinforcement cushion layer to form the supporting structure, deep pit concrete surrounding purlins and steel supports can be not needed, deep pit soil excavation is faster, deep pit and bottom plate pouring can be conducted on the foundation pit as soon as possible,the safety of the foundation pit is greatly facilitated, the construction period can be well shortened, and the project is promoted to be better completed and fulfilled.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a deep pit support structure in a foundation pit and a construction method thereof. Background technique [0002] Along with the rapid development of the national economy, China's urbanization process is also accelerating. Land, as an essential part of urban construction, has become the main factor affecting urbanization. In order to save construction costs and improve land utilization, urban buildings are increasingly high-rise and dense. "Features. The foundation pit enclosure structure is an organic body that interacts with the soil and the enclosure structure. It must not only ensure the stability of the foundation pit and the safety and convenience of operations in the pit, but also ensure the displacement of the soil at the bottom of the pit and outside the pit. Control within a certain range to ensure the normal use of adjacent buildings and municipal facilitie...

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Problems solved by technology

[0004] However, this method is not applicable to the situation where there is a deep pit in the foundation pit. For example, if there is a foundation pit project with a deep pit in a basement elevator shaft, if too many horizontal internal supports are installed inside the foundation pit, it will seriously affect the construction of the deep pit. Therefore, how to solve the problem? The foundation pit protection of the foundation pit engineering of the elevator shaft deep pit in the basement has become a research hotspot

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