Construction Method of Stiff Composite Pile Based on Pumping, Drainage and Precipitation

Abstract

The invention discloses a construction method of a stiff composite pile based on pumping and drainage water reduction. The construction method comprises the steps that (1) a plurality of tube wells and plastic drainage plates are arranged for pumping and drainage operation in a peripheral soft soil layer of a pile position of the to-be-constructed stiff composite pile, the underground water levelis lowered, the water content of a soil body is decreased, density is improved, and upper soft soil is hardened and dense; (2) construction of a discrete pile is carried out on the pile position; (3)stirring and high-pressure air injection, powder injection or guniting operation are carried out in the discrete pile, a cement soil pile is constructed, pumping and drainage operation is continuouslycarried out through the surrounding tube wells, injected gases, powder or slurry moves towards the tube wells, and powder or slurry is easily absorbed by the soil body; and (4) a rigid core pile is constructed in the cement soil pile. According to the construction method, the construction effect in soft soil is good, a pile body is dense, strength is high, soil around the pile is stable, and integral stability of a foundation is good.

Description

technical field [0001] The invention relates to a construction method of a stiff composite pile based on pumping, draining and dewatering. Background technique [0002] If the construction of the existing cement-soil piles is in soft soil, due to the high water level of the soft soil base and the high water content of the soil, it is easy to generate large super-pore water pressure during pile foundation construction and it is difficult to dissipate. This problem will cause the horizontal and vertical displacement of the soil, and even cause the pile body to float and the pile position to shift, which will affect the quality and stability of the foundation. Contents of the invention [0003] The purpose of the present invention is to provide a construction method suitable for cement-soil piles in soft soil, adding tube wells, plastic drainage boards and bulk materials, forming exhaust and drainage channels in soft soil, and extruding when constructing rigid core piles The...

AI Technical Summary

Problems solved by technology

[0002] If the construction of the existing cement-soil piles is in soft soil, due to the high water level of the soft soil base and the high water content of the soil, it is easy to generate large super-pore water pressure during pile foundation construction and it is difficult to dissipate

This problem will cause the horizontal and vertical displacement of the soil, and even cause the pile body to float and the pile position to shift, affecting the quality and stability of the foundation