Root pile active tracking layered grouting system and construction method

Abstract

The invention discloses a root pile active tracking layered grouting system and a construction method. Root piles arranged in rows are driven between a building and grouting holes for grouting retaining, the grouting holes adopt sleeve valve pipes for active tracking grouting construction, and the system further comprises a high pressure tube used for injecting high-pressure air into the groutingholes to cut the surrounding soil body. The root pile active tracking layered grouting system and the construction method have the advantages that the root piles are driven between the building and the grouting holes, the root piles adopt a positive cycle mud protection wall pore-forming process, the surrounding soil body is not affected basically, and after the root piles reach strength, sleeve valve pipe active tracking grouting construction can be carried out, thereby not only reinforcing the soil body around the building, but also reducing the harmful deformation caused by grouting to thebuilding.

Description

technical field [0001] The invention relates to the technical field of civil building construction, in particular to an active tracking layered grouting system for tree root piles and a construction method. Background technique [0002] With the rapid development of my country's social economy, the progress of modern city construction is accelerating, large-scale comprehensive multi-functional buildings are emerging, and infrastructure construction is also improving day by day. During the excavation of the foundation pit, the unloading effect of the adjacent soil causes the corresponding deformation of the foundation pit enclosure, which causes the corresponding displacement and deformation of the adjacent building foundation or the tunnel outside the pit along with the soil. For example, most of the existing subway tunnels in operation are shield tunnels connected by prefabricated concrete segments and high-strength bolts, which are sensitive to deformation. Excessive defo...

AI Technical Summary

Problems solved by technology

For example, most of the existing subway tunnels in operation are shield tunnels connected by prefabricated concrete segments and high-strength bolts, which are sensitive to deformation

Excessive deformation will not only lead to the opening of the connection between the segments, staggered platform, and warping of the track, which will affect the operation of the subway train. Large deformation and damage occur

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