Pre-stressed anchor rod type steel internal support structure of continuous arched slope protection piles and construction method of pre-stressed anchor rod type steel internal support structure

Abstract

The invention discloses a pre-stressed anchor rod type steel internal support structure of a continuous arched slope protection pile and a construction method of the pre-stressed anchor rod type steel internal support structure Slope protection piles which are arrayed in a foundation pit are arranged transversely and anchorage forces of all the pre-stressed anchor rods distributed at intervals are transferred to the slope protection piles through anchor heads; the section steel internal support structure is formed by connecting an upper layer of I-steel and a lower layer of I-steel which are mutually parallel, connecting plates which are connected to the external faces of air-adjacent sides of the two I-steels, and anchor plates as well as end sealing plates which are connected to adjacent wing edges at slope-adjacent sides of the two I-steels; a vertical view of each section of the steel internal support structure is in an arch which is connected by three parts as follows: a middle part, a left part and a right part; the whole section steel internal support structure and the slope protection piles form a continuous arch; the middle part of each section of section steel support is flat as well as straight and connected with the anchor plates; the outer edge of the middle part is flushed with the air-adjacent sides of the slope protection piles; the left and right parts of each section of section steel support are located at the two sloping sides of the arch; and two external end supporting lugs of each section of section steel support are fixedly connected with left and right slope protection piles. According to the pre-stressed anchor rod type steel internal support structure and the construction method thereof disclosed by the invention, problems that the support of the external foundation pit projects out of the pile body, a foundation trench space is occupied as well as recycling and reutilization is unavailable are solved.

Description

technical field [0001] The invention belongs to the field of building foundation pit support and reinforcement, in particular to a slope protection pile prestressed anchor rod section steel inner support and a construction method thereof. Background technique [0002] The traditional deep foundation pit pile anchor support section steel waist beam is usually anchored by long steel waist beam and slope protection pile, and the installation form is external installation, that is, the section steel waist beam is installed on the outside of the air surface in a straight line. Its disadvantage is that the shaped steel waist beam, anchor plate, anchor head and prestressed anchor rod protrude from the pile body, occupying a certain foundation groove space. If single-sided formwork is used, the net distance between the slope protection pile and the outer wall of the proposed underground structure is less than the space required for the installation of the steel beam, and the outer s...

AI Technical Summary

Problems solved by technology

The safety and stability of the foundation pit support system must be maintained before demolition. If the structure has not yet formed a top-to-top unloading of the slope protection piles, it will affect the construction safety

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