Combined Pile Type and Construction Method of Static Drilling, Extrusion Expansion Disc and Pipe Pile

Abstract

The invention discloses a combined pile type of a static drilling extruded expanded branch plate and a pipe pile, including a pipe pile, a branch pile sleeved on the outer wall of the pipe pile, and an enlarged pile connected to the end of the branch pile; The pipe pile is a hollow pipe, and the pipe is filled with cement soil to form a solid pipe pile; the support plate pile includes a support plate pile body and support plates distributed at equal intervals along the axial direction of the support plate pile body, and the support plate piles are The cement-soil pile body and the enlarged pile are expanded concrete pile bodies. The combined pile type of the static drilling squeeze expansion support plate and the pipe pile squeezes part of the soil to the hole wall, improves the pile side friction resistance, reduces the discharge of the original soil, and at the same time excavates the excess soil to form a large-diameter The pile foundation is improved, and the bearing capacity of the pile foundation is improved; secondly, a plurality of support plates are set to apply pre-pressure to the side wall, expand the contact area between the combined pile and the soil, increase the effective area of ​​the pile body, and improve the bearing capacity of the combined pile ; Then press the expansive concrete through the pile end reaming to form a preload on the pile end, further improving the bearing capacity of the pile end.

Description

technical field [0001] The invention relates to a pile foundation and a construction method in the field of civil engineering, in particular to a combined pile type of a static drilling extrusion expansion disc and a pipe pile and a construction method thereof. Background technique [0002] At present, pile foundation types are mainly used in building construction, railway and bridge pile foundation technology, and pile foundations such as squeezed soil piles, non-squeezed soil piles, and support piles are commonly used. Soil-squeezing piles are mainly in the form of driving or static pressure. The soil friction force of the hole wall is relatively high, but the pile diameter is generally small; and a single soil-squeezing pile is difficult to drive, causing obvious soil uplift and displacement, and causing damage to adjacent buildings. adverse effects. Non-squeezing soil piles are mainly constructed by manual digging, rotary drilling, etc. The frictional resistance of the ...

AI Technical Summary

Problems solved by technology

Soil-squeezing piles are mainly in the form of driving or static pressure. The soil friction force of the hole wall is relatively high, but the pile diameter is generally small; and a single soil-squeezing pile is difficult to drive, causing obvious soil uplift and displacement, and causing damage to adjacent buildings. adverse effects

Non-squeezing soil piles are mainly constructed by manual digging, rotary drilling, etc. The frictional resistance of the soil on the side of the pile is generally low, and the pile diameter is large; and a single non-squeezing soil pile has a large amount of soil transportation difficulties, and mud treatment is also very inconvenient. The requirements for clearing holes and concrete pouring are relatively high, and the original soil cannot be fully utilized, causing serious environmental pollution

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