Construction method of long spiral cast-in-situ bored pile

Abstract

The invention discloses a construction method of a long spiral cast-in-situ bored pile. When used for constructing the cast-in-situ bored pile in an underground station, the method has the advantages of good pile forming quality, short construction period, high effect, no need of mud preparing, circulating and disposal sites and other places, small influence on the surrounding environment, good pile forming quality and the like, and can satisfy the characteristics and requirements, such as high construction environment protection requirement, of the underground station. In addition, the construction method disclosed by the invention is also applicable to various soils, such as clays, silts and miscellaneous fills, and can be used for constructing cast-in-situ bored piles under complicated geological conditions which are liable to generate collapse, hole shrinkage and the like, such as soft soil, drift sand formation, sand-pebble layers, and high underground water levels.

Description

Technical field [0001] The invention relates to a construction method of a long spiral bored pile, in particular to a construction method of a long spiral bored pile in a subway station or other complicated geological conditions. Background technique [0002] In the construction of subways in cities, it is inevitable to construct bored piles as enclosing structures or uplift piles, load-bearing piles, etc. Traditionally, rotary drills and rotary drills are used to inevitably produce hole collapse, diameter reduction, and excessive sedimentation thickness. In addition, the process requires a large amount of mud to protect the wall, and requires mud production, recycling, and disposal sites. There is often no site for the above process to build subways in cities. Summary of the invention [0003] The purpose of the present invention is to provide a bored pile construction method that does not require mud preparation, circulation, disposal, etc., and can meet the characteristics of h...

AI Technical Summary

Problems solved by technology

[0002] In the construction of subways in cities, it is inevitable to construct bored piles as enclosure structures or uplift piles, load-bearing piles, etc. Traditionally, rotary drills and rotary drills are used in the construction, and hole collapse, diameter shrinkage, and excessive sediment are unavoidable. and other quality problems, and a large amount of mud wall protection is required in the process, and mud production, circulation, and disposal sites are required. Construction of subways in cities often has no site for the above-mentioned processes.