Pressure controllable cast-in-situ bored pile end and pile side intelligent post-grouting device and method

Abstract

The invention relates to a pressure controllable cast-in-situ bored pile end and pile side intelligent post-grouting device and method. The pressure controllable cast-in-situ bored pile end and pile side intelligent post-grouting device comprises a pile side grouting device, a pile end grouting device and an intelligent testing device. The pressure controllable cast-in-situ bored pile end and pileside intelligent post-grouting device has the beneficial effects that a micro earth pressure meter and a displacement meter cooperate with a pile body axial force testing device to form a pile side grouting intelligent testing system; the intelligent testing system conducts comprehensive testing on external earth pressure, piston displacement and pile body axial force during pile side grouting and judges the effect of the pile side grouting on an earth mass around a pile and a pile body to realize reasonable grouting, and the problem of insufficient grouting or excess grouting is avoided; thepile side minimum grout outlet pressure and the pile side maximum grout outlet pressure can be set, and the pile side grout outlet pressure can be adjusted by adjusting the grout outlet pressure of agrouting machine; the optimal grouting volume of pile side grouting can be realized according to changes of the pile side pressure and pile body axial force, and the pile side grout outlet conditionscan be known through data of the displacement meter.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering construction, and in particular relates to a controllable pressure-controllable post-grouting device and method for pile ends and pile sides of bored piles. Background technique [0002] Most of the engineering piles used in my country's coastal areas are bored piles. Due to the distribution of weak strata, the bearing capacity of pile foundations often cannot meet the requirements. According to the requirements of JGJ94-2008 "Technical Specifications for Building Pile Foundations", for piles with a pile length exceeding 15m and a high increase in bearing capacity, it is advisable to use pile-side compound grouting. Therefore, it is necessary to improve the bearing capacity of pile foundation through post-grouting at pile tip and pile side. Post-grouting at the pile bottom and pile side means that after the bored pile is formed into a pile, the cement slurry is pressed into the pile bottom...

AI Technical Summary

Problems solved by technology

To solve the problems of unsmooth grouting and difficult unplugging in the construction of grouting pipes, a post-pile grouting pipe valve is provided with several flower pipe holes in the upper two-thirds of the pipe body. The outer layer of the tube hole area is provided with a coating, and the lower outlet of the tube body is connected with a rubber tube

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