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.
出处
《地下空间与工程学报》
CSCD
北大核心
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
关键词
模型固废
三轴试验
剪切强度
孔隙水压力系数
model municipal solid waste
triaxial test
shear strength
pore pressure coefficient
