Tunnel inner micro-destabilization slip-casting technique

Abstract

The present invention relates to tunnel construction class which particularly relates to a tiny disturbance grouting control technique in tunnel, which comprises choices of grouting equipment, grouting material and technique parameters, wherein, the grouting material is two slurries with shrinkage no more than 5%, in grouting process, when using synchronous supplement slurry, the pressure of grouting is no more than 0.5Mpa, grouting flux is 15-15L / min, when using replacement grouting and pipe-driving grouting in layers, the pressure of grouting is 0.3-0.5Mpa, grouting flux is 15-25L / min. The present invention injects a special serum around bottom layer by special tiny disturbance control technique in tunnel to act as not only reinforce function, but also least disturbance for soil in grouting process, controls the disturbance in grouting process and stratum displacement by tunnel construction at a little degree, protect efficiently adjacent underground and buildings sensitivity of ground settlement.

Description

technical field [0001] The invention relates to tunnel construction, in particular to a micro-disturbance grouting process in a tunnel. Background technique [0002] The currently commonly used grouting methods include compaction grouting, rotary jet grouting, cracking grouting, etc. The construction methods are different, and they can still meet the requirements for better strata or environmental conditions; the existing grouting technology usually cannot Taking into account the complex surrounding environment, and generally only consider the final effect of grouting, without considering the disturbance of the grouting process, so in the case of extremely high requirements for environmental protection, especially when the deformation needs to be controlled within a small range of millimeters, Important parameters such as grouting flow rate, grouting times, and pipe pulling speed will produce relatively significant self-disturbances, so the degree of refinement is crucial to...

AI Technical Summary

Problems solved by technology

[0002] The currently commonly used grouting methods include compaction grouting, rotary jet grouting, cracking grouting, etc. The construction methods are different, and they can still meet the requirements for better strata or environmental conditions; the existing grouting technology usually cannot Taking into account the complex surrounding environment, and generally only consider the final effect of grouting, without considering the disturbance of the grouting process, so in the case of extremely high requirements for environmental protection, especially when the deformation needs to be controlled within a small range of millimeters, Important parameters such as grouting flow rate, grouting times, and pipe pulling speed will produce relatively significant self-disturbances, so the degree of refinement is crucial to the realization of construction control objectives

If the construction process is not properly controlled, the grouting method for the purpose of reinforcement often causes greater disturbance to the stratum, making the control index impossible to achieve

Images