基于正交设计试验的地铁施工废弃泥浆分离影响因素研究  

Research on Influencing Factors of Subway Construction Waste Slurry Separation Based on Orthogonal Design Test

作　　者：吕林海[1,2] 谢开仲 王炳华 覃文杰 卢淩寰 LYU Linhai;XIE Kaizhong;WANG Binghua;QIN Wenjie;LU Linghuan(College of Civil Engineering and Architecture,Guangxi University,Nanning,Guangxi 530004,China;Nanning Rail Transit Group Co.,Ltd.,Nanning,Guangxi 530029,China;Guangxi Institute of Building Research and Design,Nanning,Guangxi 530011,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]南宁轨道交通集团有限责任公司,广西南宁530029 [3]广西建筑科学研究设计院,广西南宁530011

出　　处：《施工技术（中英文）》2022年第4期123-127,共5页Construction Technology

基　　金：国家自然科学基金(51868007,51878186);国家自然科学基金重点项目(51738004)。

摘　　要：为解决地铁施工废弃泥浆分离难的问题,采用化学絮凝法,通过正交设计试验研究絮凝剂浓度、分子量、泥浆pH值、搅拌速度及时间等因素对泥浆分离效果的影响。结果表明,各因素对粉质黏土类泥浆分离效果影响的主次顺序为絮凝剂浓度>泥浆pH值>搅拌时间>絮凝剂分子量>搅拌速度;泥浆最佳分离条件为絮凝剂浓度为0.1g/L、分子量为1800万、pH值为7、搅拌速度为70r/min、搅拌时间为180s,根据验证试验,固相沉降率平均值为60.8%时,分离效果明显。In order to solve the problem of difficult separation of waste slurry in subway construction,chemical flocculation method is used to study the influence of flocculant concentration,molecular content,slurry pH value,mixing speed and time on slurry separation effect through orthogonal design test.The results show that the primary and secondary order of factors affecting the separation effect of silty clay slurry is flocculant concentration>slurry pH value>mixing time>flocculant molecular content>mixing speed,and the optimal separation condition of slurry is that the flocculant concentration is 0.1g/L,the molecular content is 18 million,the pH value is 7,the mixing speed is 70r/min,and the mixing time is 180s.According to the verification test,the average value of the solid phase sedimentation rate is 60.8%,and the separation effect is obvious.

关 键 词：地铁 废弃泥浆 正交试验 絮凝剂 分离技术 

分 类 号：X731[环境科学与工程—环境工程]