Ground slurry mixing system and method for TBM tunnel duct piece back grouting

Abstract

The invention provides a ground slurry mixing system and method for TBM tunnel duct piece back grouting. The system comprises a cement tank car, a high-pressure pumping pipe, a bulk cement storage system, a cement conveying system, a cement weighing system, a cement slurry mixing system, a slurry feeding system, a slurry storage tank and a PLC control system. The bulk cement storage system is arranged on a concrete foundation, and comprises a cement bin and a dustproof oil drum. A material pumping opening and an exhaust opening are formed in the cement bin, the cement tank car is connected with the material pumping opening in the cement bin through the high-pressure pumping pipe, the cement bin is connected with the dustproof oil drum through an exhaust pipe, and dust-containing waste gasin the cement bin is filtered out. The cement conveying system comprises a screw conveyer and a conveyer motor. The cement weighing system comprises a weighing hopper. The cement slurry mixing systemcomprises a stirring drum and a stirring motor. The slurry feeding system comprises a grouting machine. Slurry mixing is completed on the ground, the slurry mixing efficiency and quality are improved,and dust harm to workers is avoided.

Description

technical field [0001] The invention belongs to the technical field of slurry mixing systems, and in particular relates to a ground slurry mixing system and method for back grouting of TBM tunnel segments. Background technique [0002] The traditional cement slurry mixing process during TBM grouting construction adopts the method of installing slurry mixing equipment on the supporting trolley, and manually injecting clean water and bagged cement into the slurry mixing tank for mixing, which has four major drawbacks. The first traditional slurry mixing method needs to set up the mixing function area, bagged cement storage area and other areas in the limited space of the supporting trolley, which occupies the already narrow space resources; the second supporting slurry mixing equipment is limited by space. , the capacity of the mixing tank is small, and the amount of one-time mixing often cannot meet the needs of single-ring grouting construction, causing construction to stop ...

AI Technical Summary

Problems solved by technology

The first traditional slurry mixing method needs to set up the mixing function area, bagged cement storage area and other areas in the limited space of the supporting trolley, which occupies the already narrow space resources; the second supporting slurry mixing equipment is limited by space. , the capacity of the mixing tank is small, and the amount of one-time mixing often cannot meet the needs of single-ring grouting construction, causing construction to stop and affecting construction efficiency; third, only manpower can be used to put in bagged cement, which is very easy to put in during the putting process. Dust pollution is generated, which damages the health of workers; Fourth, the efficiency of manual cement injection is low, and the amount of cement input is easily affected by human factors, resulting in inaccurate slurry mix ratios

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