Static drill squeezed branch and pipe pile combined pile type and construction method thereof

Abstract

The invention discloses a static drill squeezed branch and pipe pile combined pile type. The static drill squeezed branch and pipe pile combined pile type comprises a pipe pile, a squeezed branch pile and an expanded pile, wherein the outer wall of the pipe pile is sleeved with the squeezed branch pile, and the expanded pile is connected with the end of the squeezed branch pile. The pipe pile is a hollow pipe. The pipe is filled with cement soil, and the solid pipe pile is formed. The squeezed branch pile comprises a squeezed branch pile body and squeezed branches distributed on the squeezed branch pile body at equal intervals in the axial direction. The squeezed branch pile is a cement soil pile. The expanded pile is an expanded concrete pile body. According to the static drill squeezed branch and pipe pile combined pile type, part of a soil body is extruded to the hole wall, the pile side friction is increased, discharge of an original soil body is reduced, meanwhile part of the residual soil body is dug out, a large-caliber pile foundation is formed, and the pile foundation bearing force is improved; then the squeezed branches are arranged, pre-pressure is applied to the side wall, the contact area of the combined pile and the soil is increased, the effective area of the pile body is increased, and the bearing force of the combined pile is improved; and then expansive concrete is pressed into a pile end expanded hole to form pre-pressure on the pile end, and the bearing capacity of the pile end is further improved.

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 ...

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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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