Design method of water grouting treatment for surrounding rock fissures in tunnel and underground engineering

Abstract

The invention discloses a design method for water grouting treatment of surrounding rock fissures in tunnels and underground engineering, including analyzing regional geological and hydrogeological conditions, finding out the basic geological characteristics of the main controlling water-conducting fissures, and analyzing and testing the physical and chemical properties of typical grouting treatment materials Properties, construction of grouting diffusion control equation in fracture channel, calculation of theoretical value of grouting pressure based on grouting process control, calculation of limit grouting pressure based on stability analysis of surrounding rock, determination of final grouting pressure and design value of drilling spacing, Steps such as formulating the end standard of grouting, dynamic design of grouting control plan for surrounding rock fissure water in underground engineering, etc. After adopting this design method, the scientific selection of key technical parameters in the tunnel and underground engineering surrounding rock fissure water grouting plugging project can be realized, and good grouting effect can be achieved.

Description

technical field [0001] The invention belongs to the field of prevention and control of water inrush in underground engineering, in particular to a design method for grouting control of tunnels and surrounding rock fissures in underground engineering. Background technique [0002] During the construction of tunnels and underground projects, joints and fissures destroy the integrity of the rock mass and increase the porosity and permeability of the rock mass. Water inrush disasters, causing casualties and heavy property losses. At present, grouting has become the main method of water damage control of tunnel and underground engineering surrounding rock fissure water. However, due to the hidden nature of grouting engineering, the formulation and design of grouting control schemes for annular channels often rely on experience, especially the lack of scientific guidance in the selection of grouting pressure and grouting hole spacing, resulting in large deviations in design value...

AI Technical Summary

Problems solved by technology

However, due to the hidden nature of grouting engineering, the formulation and design of grouting control schemes for annular channels often rely on experience, especially the selection of grouting pressure and grouting hole spacing due to lack of scientific guidance leads to large deviations in design values

If the grouting pressure is too high, the high-pressure grouting will exert excessive load on the surrounding rock, which is not conducive to the stability of the rock mass and lead to the destruction of the surrounding rock; The fissures containing water conduction cannot be completely sealed and there are poorly sealed sections, and the grouting effect is poor

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