Slurry mixing method for simultaneous double-liquid grouting in shield tunnel

Abstract

The invention discloses a slurry mixing method for simultaneous double-liquid grouting of shield tunnels. The steps are as follows: S1, equipment installation; S2, mixing A slurry; S3, mixing A and B slurries. The invention realizes the short-distance transportation of A slurry through the mixing system installed on the rear trolley, reduces the performance loss of A slurry before grouting, and ensures the grouting quality; at the same time, the construction amount of the pipeline is greatly reduced, and labor is reduced. Strength and construction cost, effectively improve construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of A slurry mixing, and in particular relates to a slurry mixing method for synchronous double-liquid grouting in a shield tunnel. Background technique [0002] In the process of shield tunnel excavation, because the outer diameter of the shield cutter head is larger than the outer diameter of the lining segment, and the shield shell has a certain thickness, in addition, there are phenomena such as over-excavation during the excavation process, and the shield tail is separated from the segment. After that, an annular gap will appear between the segment and the stratum. In the actual shield tunnel project, the synchronous grouting technology is usually used to fill the shield tail gap. At present, the commonly used grouting grouting in shield tunnel construction can be roughly divided into two types, namely single-liquid grouting material and double-liquid grouting material. The double-liquid slurry is to pu...

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Problems solved by technology

[0004] 1. The pipeline transportation distance of the well-mixed A slurry is long, and with the excavation of the shield machine, there are problems of low construction efficiency and high pipeline failure rate, and the homogeneity of cement-based materials is likely to be reduced due to long-distance pipeline transportation;

[0005] 2. If the open-cut section from the starting working shaft to the ground has not been constructed, and the mortar truck transporting A slurry cannot enter the tunnel through the existing road, the mixed A slurry needs to be vertically transported up and down through the starting working shaft of the shield tunnel into the tunnel. Large amount of construction and high cost

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