城市固体废弃物大直径三轴压缩试验研究  

Large-Scale Triaxial Compression Test for Municipal Solid Waste

作　　者：高丽亚[1] 冯世进[2] 陈云敏[3] 孔宪京[4] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学地下建筑与工程系,上海200092 [3]浙江大学岩土工程研究所,浙江杭州310027 [4]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《同济大学学报（自然科学版）》2007年第12期1602-1606,共5页Journal of Tongji University:Natural Science

基　　金：中科院岩土力学重点实验室开放课题资助项目(Z110604);同济大学青年优秀人才培养行动计划资助项目(2006KJ044);上海市晨光计划资助项目(2007CG23)

摘　　要：参照杭州天子岭填埋场城市固体废弃物(MSW)的主要成分,人工配制MSW试样,利用大型三轴剪力仪进行固结排水剪试验,研究MSW的剪切强度特性.由于MSW内部孔隙很大,导致固结过程中体变量非常大,固结时的体变与轴向应变基本成直线关系;当轴向应变达到15%时,剪切强度还在继续增长,MSW的应力应变关系表现为加工硬化型.破坏应变取值不同,MSW的强度参数c和φ差别很大.通过对比发现,现场静力触探试验得到的强度参数与室内大三轴试验破坏应变取为10%时得到的强度参数c和φ比较接近.To investigate the shear strength characteristic of municipal solid waste （MSW）, the consolidated drained （CD） shear tests were conducted with large-scale triaxial compression apparatus on MSW samples simulating the compositions of MSW from the Hangzhou Tianziling Landfill. Because MSW is of macroporous matter, the consolidation volumetric strain is very large, which has high lin- earity with axial strain. The shear strength continuously increases with axial strain, without reaching a well defined peak value even when the axial strain is up to about 15 %. The cohesion c and friction angle φ of MSW largely vary with different failure strain values. A comparison of the test results of cone penetration tests （CPT） with those of large-scale triaxial compression tests shows that the shear strength parameters c and φ based on CPT tests are close to those of large-scale triaxial compression test when the failure strain is 10 %.

关 键 词：城市固体废弃物 大直径三轴仪 压缩试验 摩擦角 粘聚力 

分 类 号：O319.56[理学—一般力学与力学基础]