Self-circulating posterior grouting bored pile construction method

Abstract

The invention provides a self-circulating posterior grouting bored pile construction method. The construction method comprises the steps of (1) determining the pile position and locating a drilling machine (5), (2) arranging a mud self-circulation facility, (3) boring and primary bore clearing, (4) fabricating a steel reinforcement cage, a sounding pipe and a grouting pipe, (4) placing the steel reinforcement cage, the sounding pipe and the grouting pipe, (5) mounting a guide pipe, (7) secondary bore clearing and mounting a waterproof hydrant, (8) pouring concrete, and (9) grouting under a high pressure. According to the self-circulating posterior grouting bored pile construction method, the supporting facilities such as a mud settling basin for recovering and recycling mud are arranged in the construction site, so that the land resources and the water resources can be effectively saved, the pollution of the mud to the environment can be greatly reduced, and the environment can be protected; meanwhile, the construction cost is reduced; furthermore, the bearing capacity of the foundation pile can be effectively improved by about 30%, and therefore, under the circumstance of the certain load of the foundation pile, the diameter of the foundation pile can be accordingly reduced, the construction investment can be saved and the economic benefit can be further increased.

Description

Technical field [0001] The invention relates to a grouting method in building construction, in particular to a construction method of a self-circulation post-grouting bored pile. Background technique [0002] Due to the scarcity of land resources, in order to make better use of the limited land resources, there are more and more high-rise buildings, and the building volume is getting larger and larger, and the amount of foundation piles has doubled. With the advancement of technology and the advantages of simple construction of bored piles, no soil squeezing, no vibration, and low noise, the use of bored piles in pile foundation projects for tall buildings is increasing. Corresponding bored pile construction methods have been studied: for example, the publication number is CN101139836A, the invention name is "post-grouting construction method for bored cast-in-place column pile ends", the publication number is CN15401014A, and the invention name is "concrete cast-in-place pile co...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: aiming at the problems in the prior art, to provide a construction method of grouting bored piles after self-circulation, which can not only improve the bearing capacity of foundation piles, but also effectively solve the problems of water and soil waste and mud pollution.

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