Prestressed steel supporting system for deep foundation pit

Abstract

The invention provides a prestressed steel supporting system for a deep foundation pit, and belongs to the technical field of foundation pit supporting systems. The prestressed steel supporting system comprises a plurality of prestressed beams mounted on the inner side of a structural beam and circumferentially distributed at intervals. The prestressed steel supporting system is different from a traditional anchoring mode, the prestress is applied to a pull rod through the arrangement of an embedded part and a tensioner, and the system can be used for reinforcing and supporting the structural beam so as to balance the external pressure of a foundation pit and improve the supporting stability of the foundation pit; through the arrangement of a protection tube shell and a spherical clamp, the assembly process of the pull rod can be simplified, the installation efficiency can be improved, after the pull rod is subjected to prestress, the pull rod can adaptively move in the protection tube shell, rigid contact between the pull rod and a connection beam is prevented, the pull rod and the connection beam are prevented from being damaged, and then the service life is prolonged; in addition, the prestressed beams provided by the embodiment of the invention can be repeatedly used, and the system has the advantages of safety, energy conservation, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of support systems for foundation pits, in particular to a prestressed steel support system for deep foundation pits. Background technique [0002] In order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, it is necessary to adopt support, reinforcement and protection measures for the side wall of the foundation pit and the surrounding environment. Whether it is a deep foundation pit project for a high-rise building or a subway, since it is excavated in the city, there are usually various structures such as traffic arteries, built buildings or pipelines around the foundation pit, which involves the excavation of the foundation pit. A very important content is to protect the safety of its surrounding structures. [0003] In the prior art, it is common to pass the two ends of the tie rods through the concrete beams for anchorage, and then pr...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, it is common to pass the two ends of the tie rods through the concrete beams for anchorage, and then pressurize the struts in the prestressed beams to complete the support and reinforcement of the concrete beams. Prestressing makes the force transmission of the whole system more complicated, the operation is more inconvenient, and the installation efficiency is low

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