Processing method for high-pressure water-enriched filling karst cavity

Abstract

The invention discloses a processing method for a high-pressure water-enriched filling karst cavity, comprising the steps of finding out a filling karst cavity through a former geologic predicting report, analyzing the karst characteristic of the found filling karst cavity, locking the proximity borderlines of the filling karst cavity according to the analysis result of the karst characteristic ofthe filling karst cavity, opening the filling karst cavity at the proximity borderlines of the filling karst cavity and releasing the water-soil pressure in the filling karst cavity. The technical scheme of the invention can effectively avoid the phenomena of water-inrush and soil-inrush generated in the filling karst cavity by directly decreasing the pressure of the filling karst cavity, and improving the safety and reliability during the tunneling and the tunnel operation.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to a treatment method for a high-pressure water-rich filled dissolved cavity. Background technique [0002] Since about 15% of the terrain on the earth is karst landform, tunnel construction is sometimes carried out under karst geological conditions. Therefore, it is necessary to overcome the influence of karst geology on tunnel construction during the construction process. When a filling dissolved cavity is encountered during construction, due to the large water and soil pressure inside the filled dissolved cavity, if the filled dissolved cavity is not treated, it will cause engineering disasters such as water inrush and mud inrush, making the tunnel construction impossible or Seriously affect the safety of tunnel construction and affect the construction period, especially the possibility of water and mud inrush in the high-pressure water-rich filled solution cavi...

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Problems solved by technology

[0004] Among the engineering measures to deal with the high-pressure water-rich filling dissolution cavity in the prior art, the grouting method or the freezing method are concealed construction methods, which control the pressure in the filling dissolution cavity to resist the Water and soil pressure, however, because the above-mentioned construction method is greatly affected by stratum heterogeneity, material selection and technical level, it is easy to have grouting blind spots or freezing blind spots during project implementation, and the strong water and soil pressure of high-pressure water-rich filling solution cavity It is very easy to penetrate the blind area in the construction of the project, resulting in water inrush, mud inrush and other phenomena, which makes the entire tunnel construction a great safety hazard and is not conducive to the normal construction of the tunnel

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