Post-tensioned prestressing rectangular hollow foundation pit support pile

Abstract

The invention relates to a post-tensioned prestressing rectangular hollow foundation pit support pile. The support pile comprises a rectangular stabilizing ring rib, a rectangular steel reinforcement framework, concrete, a bottom pressure bearing plate and a locking anchorage device, wherein reinforcing steel bars are respectively arranged on a rectangular steel reinforcement framework inner side which is close to a foundation pit and the two adjacent sides of the rectangular steel reinforcement framework, an isolation pipe is arranged outside the foundation pit, a steel strand or a high tensile reinforcing steel bar is arranged in the isolation pipe, a reinforcement stirrup is used to fix the reinforcing steel bar and the isolation pipe to form a rectangular framework structure, the pressure bearing plate is arranged on the bottom end of the pile of the isolation pipe, the pile bottom pressure bearing plate is fixedly connected with one end of the steel strand or the high tensile reinforcing steel bar, the steel strand or the high tensile reinforcing steel bar penetrates through the isolation pipe, the locking anchorage device is used to lock a pile top, meanwhile, a grouting hole and a vent hole are formed in the locking anchorage device on the pile top, and the rectangular stabilizing ring rib is arranged in a rectangular hollow support pile. By the pile, a function in supporting the foundation pit is enhanced, the side deformation of a supporting structure and the adverse influence of the foundation pit to the periphery environment are reduced, the use amounts of the reinforcing steel bars and the concrete are reduced, and the building cost is saved.

Description

Technical field [0001] The invention relates to a support pile for building foundation pit reinforcement, in particular to a post-tensioned prestressed rectangular hollow foundation pit support pile. Background technique [0002] With the increasing shortage of urban land, the construction of underground space is also the general trend, and deep foundation pit support has become an important link in the excavation of underground space. In the field of building construction, circular or rectangular ordinary reinforced concrete piles are widely used as foundation pit support structures. When excavating earth and stone in the foundation pit, the soil outside the foundation pit slides towards the inside of the foundation pit, and the pile body will form a large bending moment near the outside of the foundation pit after being stressed, resulting in tensile deformation, which will lead to The deformation of the support piles is too large or even unstable, and the foundation pit ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in existing building foundation pit support piles, the present invention provides a post-tensioned prestressed rectangular hollow foundation pit support pile. This post-tensioned prestressed rectangular hollow foundation pit support pile not only has good enclosure It has strong anti-deformation ability, can effectively reduce lateral deformation, ensure the safety of building foundation pits, and reduce construction costs

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