不同絮凝剂对废弃钻孔泥浆的絮凝效果试验研究  

Experimental study on the flocculation effect of different flocculants on waste drilling slurry

作　　者：张勇[1] 刘祎阳 付志婷 禇晓淮 王国才[1] ZHANG Yong;LIU Yiyang;FU Zhiting;CHU Xiaohuai;WANG Guocai(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Zhejiang Xinsheng Construction Co.,Ltd.,Hangzhou 310015,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]浙江新盛建设集团有限公司,浙江杭州310015

出　　处：《浙江工业大学学报》2023年第4期412-417,共6页Journal of Zhejiang University of Technology

基　　金：浙江省水利防灾减灾重点实验室开放基金资助项目(FZJZSYS21005);2020年浙江省建设科研资助项目(2020K211);浙江省大学生科技创新活动计划(新苗人才计划)资助项目(2021R403078)。

摘　　要：为研究不同絮凝剂对废弃钻孔泥浆的絮凝效果,对杭州上城区某工地钻孔灌注桩所产生的废弃钻孔泥浆进行不同种类、不同掺入量下的絮凝试验,分析泥浆表观特征、不同时段上清液浊度以及下层泥浆含水率的变化情况,研究絮凝剂种类、絮凝剂掺入量和絮凝时间等因素对废弃钻孔泥浆脱水絮凝性能的影响。试验结果表明:在相同试验条件下,无机絮凝剂对废弃钻孔泥浆的絮凝效果明显优于有机絮凝剂,其中聚合氯化铝的絮凝效果最佳;不同种类絮凝剂存在最佳掺入量和最佳絮凝时间,非离子型聚丙烯酰胺(NPAM)、阳离子型聚丙烯酰胺(CPAM)、阴离子型聚丙烯酰胺(APAM)、聚合氯化铝(PAC)以及聚合硫酸铁(PFS)的最佳掺入量分别为0.3,0.4,0.4,0.3,0.2 g,其最佳絮凝时间分别为5,4,5,4,4 h。在常用的絮凝剂中,聚合氯化铝的经济效益最佳。In order to further reveal the flocculation effect of different flocculants on waste drilling slurry,a flocculation test under different kinds and amounts of flocculants is carried out on the waste slurry taken from a drilled pile construction site in Shangcheng District,Hangzhou.The slurry characterization,the turbidity change of the upper clear liquid and the moisture content change of the lower slurry over a period of time are analyzed to explore the influence of flocculant type,flocculant amount,time and other factors on the dewatering flocculation performance of the waste slurry.The results show that the flocculation effect of inorganic flocculant on the waste drilling slurry is better than that of organic flocculant.The effect of polyaluminum chloride is the best.Each flocculant has the best feeding amount and optimal settlement time under the same experimental conditions.The best dosage of NPAM,CPAM,APAM,PAC and PFS are 0.3,0.4,0.4,0.3,0.2 g,and the corresponding best flocculating time is 5,4,5,4,4 h,respectively.From the perspective of economic benefits,polyaluminum chloride is also the best choice.

关 键 词：废弃钻孔泥浆 絮凝剂 掺入量 絮凝时间 

分 类 号：TU411[建筑科学—岩土工程]