模型固废三轴固结不排水剪试验及孔压分析  

Consolidated Undrained Triaxial Test on Model Municipal Solid Waste and Analysis of Pore Water Pressure

作　　者：吕玺琳[1,2] 赖海波[1,2] 王蓉[3] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]同济大学地下建筑与工程系,上海200092 [3]上海岩土工程勘察设计研究院有限公司,上海200031

出　　处：《地下空间与工程学报》2016年第6期1593-1597,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家重点基础研究发展计划(973计划)(2012CB719803);上海市自然科学基金面上项目(13ZR1443800);中央高校基本科研业务费学科交叉类(面上)项目

摘　　要：采用草炭、石英砂、高岭土按质量比0.5∶1∶1及1∶1∶1人工配制模型固废。通过应力路径三轴仪,对模型固废开展了固结不排水三轴剪切试验研究,获得其强度特性及孔压变化特性。通过两种不同草炭含量模型固废试验结果对比表明,高草炭含量模型固废在相同应变条件下的剪应力比低草炭含量的大,说明草炭含量增加将使得固废内部颗粒相互作用增强,更有利于其强度发挥。根据不排水剪切过程中孔压的变化特性,获得了草炭含量对孔隙水压力系数的影响规律,得出了固废达到破坏条件时该系数的范围,并与以往真实固废的试验结果进行了对比。By mixing peat,quartz sand and kaolin clay according to the weight proportion of 0.5 ∶ 1 ∶ 1 and 1 ∶ 1 ∶ 1,model municipal solid waste sample was prepared. The shear strength and pore water pressure of the model municipal solid waste were obtained by consolidated undrained triaxial test. The results show that shear stress increases with the increases of peat content under the same strain condition,indicating that the increases of peat content can reinforce the shear strength of model MSW. According to the varying characteristics of pore water pressure,the influence of peat content on the pore pressure coefficient was analyzed,The range of the coefficient at failure state of model MSW was obtained,and the obtained result was compared with previous experimental data.

关 键 词：模型固废 三轴试验 剪切强度 孔隙水压力系数 

分 类 号：TU449[建筑科学—岩土工程]