Dry powder type synchronous grouting construction technology
A technology of synchronous grouting and construction technology, applied in shaft lining, tunnel lining, underground chamber, etc., can solve the problems of uneven quality of mixed grout, concern about the effect of tunnel floating control, and inconvenient use of wet slurry storage equipment. Achieve the effects of convenient operation, solving transportation and production capacity problems, and good and lasting workability
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[0054] Below in conjunction with specific example, the present invention is further described:
[0055] The subway tunnel of certain shield construction adopts the dry powder type synchronous grouting construction technology of the present invention, adopts the following steps:
[0056] 1. First, produce dry powder type synchronous grouting special mortar;
[0057] 1.1 Determine the mortar mix ratio for dry powder synchronous grouting;
[0058]Fly ash 20%, calcium-based bentonite 3.85%, slaked lime 3.0%, special dry powder admixture 0.15%, sand 73%.
[0059] All materials are powdery materials, calculated by mass percentage;
[0060] Among them, the compounding mass percentage of special dry powder admixture is: methyl cellulose ether 1.1%, naphthalene-based water reducer 33.2%, saponin 0.7%, sodium bentonite 35%, slaked lime 30%;
[0061] The methyl cellulose ether used is hydroxymethyl cellulose ether with a viscosity of 40000;
[0062] The naphthalene-based water reduce...
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