Repeated adaptive grouting system and construction method

Abstract

A repetitive self-adaptive grouting system and its construction method. The grouting system includes an open-circuit or closed-circuit grouting system consisting of a grouting pipe with a pressure-opening check valve, an adjustable pressure grouting pump, a cleaning pump, and an anchor hole. system, repeating segmental pressure regulation and secondary splitting grouting for the bolts that have completed the hole-forming grouting of the bolts. Change the splitting grouting pressure by adjusting the pressure grouting pump to open the grouting valves at different positions on the grouting pipe to complete the splitting grouting at a specific position, then use the cleaning pump to clean the grouting pipe, and repeat the adjustment for the pressure grouting pump Different pressures are used to open the grouting valves at different positions to split the grouting again, and this process is repeated many times to complete the multiple grouting splitting design requirements. The application system and its construction method finally realize the splitting of the bolt by multiple staged pressure grouting, increase the side friction resistance of the bolt, improve the load bearing capacity of the bolt, and reduce the deformation of the bolt, so as to effectively deal with the weak soil and rock layers The reinforcement can effectively enhance the entire anchoring system.

Description

technical field [0001] The invention relates to a ground treatment grouting technology, in particular to a repetitive self-adaptive grouting system and a construction method thereof. Background technique [0002] In the field of civil engineering, repeated splitting grouting technology is widely used in the support system of foundation treatment. When the bolt anchorage section passes through the weak soil layer and rock layer, due to the low shear strength and high water content of the rock layer, The anchoring body-soil side friction resistance that can be provided is also low, so the tensile bearing capacity of the anchor is low. The security of the anchorage system. In order to deal with these unfavorable conditions well, the secondary or multiple splitting grouting process is widely used to strengthen the rock and soil within a certain range around the anchor, improve the shear strength of the rock and soil around the anchor, and reduce the creep of the rock and soil. ...

AI Technical Summary

Problems solved by technology

[0005] 2) When the sleeve valve pipe is used for segmental grouting, multi-stage grouting can be carried out according to its structure, but the diameter of the sleeve valve pipe is relatively large, generally greater than 50mm, and the anchor bolt is easy to be anchored when the diameter of the anchor bolt hole is small The influence of the loss of the effective cross-sectional area of ​​the body on the bearing capacity of the bolt

[0006] 3) The multi-pipe simple splitting grouting process does not have repeatable functions and can only perform secondary splitting grouting

The current bolt splitting grouting technology and devices cannot complete high-quality splitting grouting for bolts when dealing with the need for repeatable (secondary or multiple) and segmental splitting grouting

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