Construction method for reinforcing base course and roadbed of disease road through single-hole compound grouting

Abstract

The invention discloses a construction method for reinforcing base course and roadbed of disease road through single-hole compound grouting. A base course grouting pipe and a roadbed grouting pipe areused for realizing the successive grouting on the base course and the roadbed under different pressures in single borehole; when performing the grouting, the grouting is firstly performed on groutingholes all around, and the grouting is performed on middle release holes after final setting, thereby realizing secondary grouting supplementary. The construction method comprises the following construction steps: drilling the holes, manufacturing grouting pipes, manufacturing ground polymer grout, inserting the base course grouting pipes, performing base course primary grouting, performing base course primary grouting, performing roadbed primary grouting, performing roadbed secondary grouting, blocking holes and constructing on a surface layer. By adopting the single-hole compound grouting technology, the grouting is performed on the base course and the roadbed in single borehole, the boring quantity is reduced; the low-pressure grouting is firstly performed at the base course, and then the high-pressure grouting reinforcement is performed on the roadbed; the grouting is firstly performed on the grouting holes all around, and then the grouting is performed on the center release holes,the grouting reinforcement quality and effect can be improved, and the grout oozing out loss can be reduced.

Description

technical field [0001] The invention relates to road subgrade and base course repair and maintenance projects under the condition that the strength of the subgrade and base course is damaged after years of operation of municipal roads and expressways, and specifically relates to a single-hole composite grouting reinforcement base course and subgrade construction method for diseased roads. Background technique [0002] Due to years of operation, heavy-duty traffic, and low original design grades, serious road damage has occurred, affecting driving safety and comfort, and road maintenance is required. Compared with conventional cement grouting, cement and Water glass double-liquid grouting, organic polymer material grouting, etc. have the advantages of stability, durability, and water stability, and are widely used in road grouting reinforcement. After years of engineering practice and the experience and lessons learned by colleagues in the industry, there are still the follow...

AI Technical Summary

Problems solved by technology

After years of engineering practice and the experience and lessons learned by colleagues in the industry, the following problems still exist in the construction of geopolymer grouting reinforcement: (1) When both the base and the subgrade need to be grouted, only separate grouting or simultaneous equal pressure in the same hole can be used Grouting, increase the amount of drilling or the grouting pressure does not meet the requirements; (2) additional drilling is required for supplementary grouting

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