Soil foundation pit steel pipe pile composite supporting structure and construction method

Abstract

The invention relates to a soil foundation pit steel pipe pile composite supporting structure and a construction method. The soil foundation pit steel pipe pile composite supporting structure comprises a plurality of front-row steel pipe piles and a plurality of rear-row steel pipe piles, wherein the front-row steel pipe piles and the rear-row steel pipe piles are arranged in parallel; the top ends of the front-row steel pipe piles and the top ends of the rear-row steel pipe piles are in rigid connection through top beams; the bottom ends of the steel pipe piles are all arranged in a sealed manner; a plurality of grouting holes are evenly formed in a steel pipe pile body; barb protection structures with a certain length are arranged outside the grouting holes, the grouting quality is ensured, and the bonding strength of the steel pipe piles and soil is improved; and panel structures are fixedly arranged on the open sides (foundation pit excavation sides) of the plurality of front-row steel pipe piles. The soil foundation pit steel pipe pile composite supporting structure has the beneficial effects that the steel pipe piles can be recycled, and the soil foundation pit steel pipe pile composite supporting structure is a green and environment-friendly foundation pit supporting structure; through high-pressure grouting in the steel pipes, the shear strength of the soil between the piles is improved; the composite supporting structure is formed by the soil between the steel pipe piles and is similar to a reinforced gravity type retaining wall; and the cost and construction difficulty of soil foundation pit supporting are reduced, the construction period is shortened, and the reliability of a supporting structure system is improved.

Description

technical field [0001] The invention relates to the technical field of slope and landslide support, in particular to a composite support structure and construction method of steel pipe piles for soil foundation pits. Background technique [0002] In order to reduce the impact of earthwork excavation on the surrounding environment, reinforced concrete pile-slab retaining wall piles are widely used in foundation pit engineering and slope engineering. Although the pile body has high strength, the traditional pile-slab retaining wall structure Single form, large pile cross-section and large reinforcement lead to long construction period and high project cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a composite support structure and construction method of steel pipe piles for soil foundation pits, which reduces the cost and construction difficulty of soil foundation pit support, saves the construction period, ...

AI Technical Summary

Problems solved by technology

[0002] In order to reduce the impact of earthwork excavation on the surrounding environment, reinforced concrete pile-slab retaining wall piles are widely used in foundation pit engineering and slope engineering. Although the pile body has high strength, the traditional pile-slab retaining wall structure The form is single, the pile cross-section, and the reinforcement are large, resulting in a long construction period and high project cost

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