粘粉土地层工程废弃泥浆絮凝脱水试验研究

针对岩土工程施工过程中产生的大量废弃泥浆的快速减量问题，选取在粘粉土地层施工时产生的废弃泥浆，分别添加阴离子型聚丙烯酰胺（APAM）、非离子型聚丙烯酰胺（NPAM）以及聚合氯化铝（PAC）开展室内絮凝沉降试验研究，根据沉降曲线、上清液浊度、底泥密度及含水率等指标，结合絮凝剂絮凝机理，得出最佳絮凝剂及其最优添加量，据此进行现场絮凝试验。结果表明，现场采用添加量为0.5%的阴离子型聚丙烯酰胺（APAM）进行泥浆絮凝处理效果良好，可快速达到理想的絮凝、沉降、上浮、污泥脱水处理效果。

Experimental Study on Flocculating and Dewatering of Engineering Waste Mud in Clay Silt Soil Layer

In order to solve the problem that the large amount of mud generated during the construction of the clay soil layer restricts the efficient and green construction of the project, the waste mud of the construction of a certain tunnel was selected, and anionic polyacrylamide (APAM), non-ionic polyacrylamide (NPAM) and polyaluminum chloride (PAC) were added respectively to carry out laboratory flocculation sedimentation test. The best flocculant and its optimal addition amount were obtained by combining with the flocculating mechanism of flocculant, and the field flocculation test was carried out. The results show that 0.5% APAM has good flocculation effect, which can quickly achieve the ideal flocculation, sedimentation, floating and sludge dewatering.