钻孔桩废弃泥浆絮凝-电渗试验研究

Experimental Study on Flocculation and Electroosmosis of Borehole Pile Waste Mud

钻孔桩废弃泥浆由于含水率高,流动性大,并且处理不当会存在二次污染的风险,在实际工程建设中已成为环保领域的一大难题。为了取得更好的废弃泥浆脱水效果,本文采用4种不同的絮凝剂对钻孔桩废弃泥浆进行絮凝—电渗试验。以出水量、电流密度、浊度和含水率为评价指标,对比了各絮凝剂的处理效果。结果表明,阴离子型絮凝剂添加量为30ml时,其絮凝—电渗效果最佳;经过絮凝—电渗处理后,废弃泥浆含水率显著降低。研究表明电渗法联合絮凝沉淀法(即药剂电渗处理法)可行、效果显著,值得大范围推广。

The waste mud from drilling piles has become a major challenge in the field of environmental protection in practical engineering construction due to its high water content,high fluidity,and the risk of secondary pollution caused by improper handling.In order to achieve better dewatering effect of waste mud,this article uses four different flocculants to conduct flocculation electroosmosis tests on the waste mud of drilling piles.The treatment effects of various flocculants were compared using water output,current density,turbidity and water content as evaluation indicators.The results showed that when the dosage of anionic flocculant was 30ml,its flocculation electroosmosis effect was the best,and the water content of waste mud decreased significantly after flocculation electroosmosis treatment.Research has shown that the combination of electroosmosis and flocculation sedimentation method(i.e.,chemical electroosmosis treatment method)is feasible and effective,and is worth promoting on a large scale.