Grouting reinforcement construction process capable of realizing draining and plugging combined effect for underground water in vertical shaft

Abstract

The invention relates to a grouting reinforcement construction process capable of realizing a draining and plugging combined effect for underground water in a vertical shaft. The grouting reinforcement construction process includes steps of (1), temporarily sealing the bottom of the vertical shaft, arranging grouting pipes on inner and outer sides of the vertical shaft, arranging drain pipes matched with the grouting pipes on the vertical shaft and locally pumping the water by a vacuum pump; (2), diluting sodium silicate of raw grout 39Be' by water to obtain grout 28Be', mixing TGRM grouting materials with cement according to a proportion of 1:3 to obtain second grout, mixing the grout 28Be' with the second grout according to a proportion of 1:1 to obtain liquid A, diluting sodium silicate of raw grout 39Be' by water to obtain grout 30Be', diluting strong phosphoric acid by water according to a proportion of 1:6 to obtain diluted phosphoric acid, and mixing the grout 30Be' with the diluted phosphoric acid according to a proportion of 1:1 to obtain liquid B; (3), alternately filling the liquid A and the liquid B into reinforcement soil layers of the vertical shaft via the grouting pipes and completing grouting for the periphery of the vertical shaft; and (4), feeding small pipes within a 1.5m range of the periphery of the vertical shaft by the aid of high-pressure blast, and alternately filling the liquid A and the liquid B into the periphery of the vertical shaft via the small pipes. The grouting reinforcement construction process has the advantages that 'draining' and 'plugging' are combined and work along both lines in the grouting construction process for the vertical shaft, so that water layers are prevented from diffusing and permeating towards feeble grouted positions, the vertical shaft construction difficulty is lowered, and the construction safety degree is increased.

Description

【Technical field】 [0001] The invention relates to a building construction method, in particular to a grouting reinforcement construction technology combined with dredging and plugging of underground water in a vertical shaft. 【Background technique】 [0002] The success or failure of the grouting reinforcement construction technology combined with groundwater dredging and plugging in the shaft is related to the quality and safety of the entire project. In shaft construction, it is often necessary to pass through the geological layer of the aquifer. In the case where face-to-face precipitation cannot be adopted, if the simple grouting plugging is likely to cause local water pressure to increase, which directly aggravates the diffusion of the water layer to the weak grouting area. The trend of penetration has virtually increased the difficulty of construction. [0003] In order to solve the above technical problems, it is indeed necessary to provide a safe and reliable groutin...

AI Technical Summary

Problems solved by technology

In the shaft construction, it is often necessary to cross the geological layer of the aquifer. In the case that the face-to-face precipitation cannot be adopted, if the simple grouting plugging is easy to cause the local water pressure to increase, which directly aggravates the diffusion of the water layer to the grouting weak point The trend of penetration has virtually increased the difficulty of construction