Test Study on Optimization of Flocculant Proportion for Shield Waste Slurry Treatment in Silty Clay Stratum
Aiming at the difficult problem of waste slurry treatment of super-large diameter slurry shield in silty clay stratum,combined with the engineering of Jinluo Road crossing the Yellow River Tunnel,this paper carries out an indoor test study on the flocculant added in the process of slurry treatment,compares the water segregation effect of the organic flocculant and the inorganic flocculant,and makes a preferred selection for the amount of the floccu-lant added.The test results show that cationic polyacryla-mide(CPAM)can effectively reduce the water content of slurry,and anionic polyacrylamide(APAM)and non-ionic polyacrylamide(NPAM)can not effectively reduce the water content of slurry.After adding inorganic flocculant polymeric aluminum chloride(PAC),the slurry's water segregation is slow and the water segregation effect is not good.When the addition amount of cationic polyacryla-mide(CPAM)is 0.09%-0.12%,the specific resistance reaches the minimum value,and the water segregation performance is the best.
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