The purpose of this essay is to solve the common problems that the waste slag treatment process of slurry shield significantly increase the construction cost and easily cause environmental pollution,relying on the river crossing corridor project of Xinjizhou water supply project in Jiangning District of Nanjing,which considering that the excavation line is in clay stratum.Therefore,a reuse scheme of waste slag in-stead of synchronous grouting raw materials is proposed.The feasibility of waste slag replacing bentonite raw materials was discussed.The slurry properties were tested by orthogonal design test,and the changes of slurry properties under various residue conditions were studied.The results show that the mud shield slag after preliminary treatment can replace bentonite material.Under the optimal ratio,the specific gravity of synchronous grouting slurry is 1.812 g/cm3,the consistency is 14.25 cm,the initial setting time is 10.55 h,the bleeding rate in 2 h is 1.41％,and the volume shrinkage in 28 d is 0.0147％,which can meet the performance requirements of synchronous grouting in the river crossing corridor project of Xinjizhou water supply project in Jiangning District,Nanjing,and the economic and envi-ronmental benefits of this technology are remarkable.
维普
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