Special-shaped precast pile zipper type supporting structure and construction method thereof

Abstract

The invention discloses a special-shaped precast pile zipper type supporting structure and a construction method thereof. A special-shaped precast pile comprises a special-shaped pile end plate and aspecial-shaped pile body, the special-shaped precast pile body is made of a concrete material and applies prestress, a reinforcement cage is arranged in the pile body, a pile web is in a hollow circular shape, and the special-shaped precast pile is in an irregular short T shape. The construction method comprises the steps that the special-shaped precast piles are symmetrically constructed in a staggered mode on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure; after buckling construction of the special-shaped precast piles is finished, small-diameter high-pressure jet grouting mixing pile construction is carried out at the joint of the two parallel special-shaped precast piles, and a high-pressure jet grouting mixing water stop body is formed to block a gap formed by the parallel special-shaped precast piles; and concrete crown beams are arranged at the tops of the special-shaped precast piles. The supporting structure is particularly suitable for a construction environment with a narrow site, the use amount of concrete and water-stop mixing pile cement is saved, meanwhile, the integrity and the lateral deformation resistance of the foundation pit supporting structure can be enhanced, and economic and environmental benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a special-shaped prefabricated pile zipper type support structure and a construction method thereof. Background technique [0002] With the increasing requirements of environmental protection in our country, the method of using mud retaining wall bored piles for traditional foundation pit support is gradually restricted. However, my country's building construction is booming, and the development and utilization of underground space are increasingly prosperous. There is bound to be a contradiction between the two. Coupled with the continuous rise of land prices, the planned basement exterior wall is getting closer and closer to the red line of the building land, and the range that can be used for foundation pit support is also getting smaller and smaller. The conventional foundation pit support method, support piles plus water-stop piles account for The ground width...

AI Technical Summary

Problems solved by technology

But there are still the following deficiencies: (1) Only the vertical load-bearing compressive performance of prestressed reinforced concrete special-shaped prefabricated piles is improved, but the horizontal shear resistance of foundation pit engineering support piles with horizontal loads is not enhanced; (2) A continuous water-stop system cannot be formed, and water leakage will occur when used in foundation pit support engineering, endangering the safety of the foundation pit

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