Mixed grouting device for blocking high-pressure groundwater and mixing method grouting process therefor

Abstract

The invention relates to a mixed grouting equipment for stopping groundwater with high pressure and the mixed grouting technology. The invention provides a mixed technology outside of hole with cement grout and water glass. It is used to control the freezing time of grout to ensure cement grout not scatter under the high pressure ground water and bad geological conditions so as to achieve the stopping purpose for groundwater grout. The equipment in the invention comprises distributor, static mixer, one-way valve, high speed mixer, high pressure mud pump, high pressure variable-frequency pump, storing grout barrel, water glass barrel, relative valves, pressure gauge, flow gauge and so on. The grouting technology in the invention is drilling hole, fabricating and assembling stop plug, waiting for freezing of stop plug at the hole port, starting grouting and stopping watered point. The invention can be applied in leakage stopping and reinforcing treatment for karst water inrush soil layer, piping of dam foundation of reservoir, linear flowing water and so on.

Description

technical field [0001] The invention relates to a construction technology of mixed method grouting in high-pressure groundwater treatment. It is suitable for plugging and reinforcement treatment of karst water inrush strata, reservoir dam foundation (dike) piping, linear flowing water, permeable fault zones, concentrated water gushing and water spraying in dissolved cracks. Background technique [0002] At present, in the construction of large-scale underground chambers in China, how to deal with the hazards of high-pressure groundwater during the construction process has become one of the key technical issues in the current and future construction. For grouting treatment of high-pressure groundwater, chemical grouting, cement grouting, and cement-sodium silicate double-liquid grouting are usually used. Chemical grouting has problems such as pollution to the environment, ineffective grouting, and high cost. However, the current method of double-liquid grouting is It is not ...

AI Technical Summary

Problems solved by technology

The grouting treatment of high-pressure groundwater usually adopts chemical grouting, cement grouting, and cement-sodium silicate double-liquid grouting. Chemical grouting has problems such as pollution to the environment, ineffective grouting, and high cost. The current method of double-liquid grouting is It is not only difficult to control the solidification time of the grout, but especially in the high-pressure groundwater grouting treatment, the double-liquid grout that is too late to solidify is easily diluted and washed away by the high-pressure water jet, and the expected grouting purpose cannot be achieved.

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