Anti-deformation supporting structure of foundation pit and construction method thereof

Abstract

The invention discloses an anti-deformation supporting structure of a foundation pit and a construction method thereof. The anti-deformation supporting structure comprises a plurality of pre-stressedconcrete pipe piles vertically and parallelly arranged around the foundation pit, wherein the pile tops of the two adjacent pre-stressed concrete pipe piles are connected through crown beams; first supporting plates are fixed in the tops of the pre-stressed concrete pipe piles in the radial direction, a plurality of main steel bars are fixed on the first supporting plates through fill core concrete, all the main steel bars are arranged in a circle evenly around the inner walls of the pre-stressed concrete pipe piles, and the main steel bars are connected into a whole through stirrups; each main steel bar is formed by connecting a vertical section and an inclined section, wherein each vertical section is fixed inside each pre-stressed concrete pipe pile and each inclined section is fixed inside each crown beam; and the inclined sections incline toward the outer sides of the pile walls of the pre-stressed concrete pipe piles, and bend inward at the top ends of the pre-stressed concrete pipe piles. The anti-deformation supporting structure can meet the stability requirement of foundation pit deformation in the case of reducing building energy consumption and the use of building materials, the noise and pollution to the environment produced by construction machinery are very little, and construction is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a deformation-resistant foundation pit support structure and a construction method thereof. Background technique [0002] Prestressed concrete pipe pile is a kind of hollow circular prefabricated concrete member with equal cross-section produced by pre-tensioning prestressing, centrifugal molding and high-pressure steam curing in the prefabrication plant. It is divided into prestressed concrete pipe piles (concrete The strength grade is higher than C50) and prestressed high-strength concrete pipe piles (the concrete strength grade is higher than C80). The prestressed concrete pipe pile has high pile body strength and high single pile bearing capacity; due to the existence of precompressed stress, the pile body has good bending, shearing and cracking resistance; it has good ability to penetrate the soil layer; the pile quality High; convenient and fas...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above problems in the prior art, to provide a deformation-resistant foundation pit support structure and its construction method, which can meet the deformation and stability requirements of the foundation pit while reducing building energy consumption and the use of building materials

Images