A pile construction method and special drill pipe system

Abstract

The invention discloses a construction method of piles and a drill pipe system special for the piles. The construction method includes the steps that (1) system relocation and emplacement are conducted, specifically, the drill pipe system is moved and emplaced to the set pile position; (2) spinning and sinking are conducted, specifically, the drill pipe system is spun and sunk to the set depth; (3) rotary pulling and lifting are conducted, specifically, the drill pipe system is rotatably pulled and lifted to the set height; and (4) the step (2) and the step (3) are repeated until a first pilemeets the set requirements. According to the construction method of the piles and the drill pipe system special for the piles, according to the initial setting time and the hard setting time of cementsoil, the method of pile planting in multiple time periods is adopted, the regulation limit that ordinary composite piles are implanted within 12-hour working is broken, and the timeliness and the work efficiency are improved; and two sets of hydraulic oil cylinders are arranged on the upper part and the lower part of a pile frame of static pressure equipment, the lower set of oil cylinders holdslower section piles, the upper set of hydraulic oil cylinders holds or supports precast piles, and the problem of pile extension of two-section piles and multi-section piles is solved.

Description

technical field [0001] The invention relates to a pile construction method. Background technique [0002] Due to the complexity of geological conditions, the existing mixing technology in hard soil areas has the problem of not being able to stir; the down-the-hole hammer technology in soft soil areas has the problem of not being able to flush; often the cement-soil piles are ready, and the time limit for core-planting piles of composite piles There is a problem with the stability, which has affected the development of cement-soil composite pile technology. Contents of the invention [0003] The object of the present invention is to provide a pile construction method and a special drill pipe system with convenient construction and good effect. [0004] Technical solution of the present invention is: [0005] A pile construction method is characterized in that: comprising the following steps: [0006] (1) Construction of the first pile: [0007] (1) Move the machine into...

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Problems solved by technology

[0002] Due to the complexity of geological conditions, the existing mixing technology in hard soil areas has problems of not being able to stir; the down-the-hole hammer technology in soft soil areas has the problem of not being able to flush; often the cement-soil piles are ready, and the time limit for core-planting piles of composite piles There is a problem with the performance of cement-soil composite piles, which affects the development of cement-soil composite pile technology

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