本文關鍵詞：藥劑真空預壓法處理工程廢漿試驗　出處：《巖土工程學報》2016年08期 　論文類型：期刊論文

  更多相關文章： 藥劑真空預壓 藥劑 廢棄泥漿 壓汞試驗 掃描電鏡

【摘要】：將適合于處理大面積高含水率淤泥的真空預壓法與用于污水處理的絮凝沉淀法相結(jié)合(即藥劑真空預壓法)應用于工程廢漿的固液分離。針對上海某樁基施工現(xiàn)場產(chǎn)生的廢棄泥漿采用4種不同的絮凝劑進行了沉降柱試驗,并對各自的絮凝效果進行了對比。采用最佳絮凝效果時的絮凝劑和配比,進行了室內(nèi)藥劑真空預壓模型試驗,試驗過程中對出水量和廢漿漿面高度進行監(jiān)測;試驗前后進行了含水率、顆粒分布、壓汞和掃描電鏡試驗。試驗發(fā)現(xiàn):1廢漿含水率從絮凝前的163%,降低到絮凝后的96%,經(jīng)過真空預壓后再降低到37%;2加入絮凝劑后絮體中的黏粒含量減少、粉粒含量增多,即絮凝會使小顆粒長大;3處理后廢漿的孔隙率明顯下降,沿徑向向內(nèi)逐漸減小。研究表明藥劑真空預壓法技術(shù)可行、效果顯著,值得大范圍推廣。
[Abstract]:The vacuum preloading method, which is suitable for dealing with large area and high water content silt, is combined with flocculation and sedimentation method for sewage treatment, namely, the pharmaceutical vacuum preloading method, which is applied to solid liquid separation of engineering waste slurry. 4 kinds of flocculants were used for the settlement column test of a waste pile produced in a pile foundation construction site in Shanghai, and their flocculating effects were compared. The indoor vacuum preloading model test was carried out with the best flocculation efficiency and flocculation agent. The water yield and the height of the waste slurry surface were monitored during the experiment. Moisture content, particle distribution, mercury intrusion and SEM test were carried out before and after the experiment. The test found that 1 waste slurry water content from flocculation before 163%, reduced to 96% after flocculation, after vacuum preloading and then reduced to 37%; 2 after adding flocculant, reduce the content of clay flocs in the silt content increased, the flocculation will make small particles grow up; 3 after the treatment of waste slurry porosity decreased gradually decreases along the radial inward. The research shows that the vacuum preloading technique is feasible and effective, and it is worth popularizing in a wide range.
【正文快照】： 第 38 卷 第 8 期 巖 土 工 程 學 報 Vol.38 No.8 2016 年 .8 月 Chinese Journal of Geotechnical Engineering Aug. 2016 藥劑真空預壓法處理工程廢漿試驗 ，

本文編號：1343659