城市固体垃圾的抗剪强度参数  

Shear Strength Parameters of Municipal Solid Waste

作　　者：李国成[1] 但堂辉[1] 杨武超[1] 

机构地区：[1]华中科技大学土木工程与力学学院

出　　处：《重庆大学学报（自然科学版）》2008年第2期202-205,共4页Journal of Chongqing University

摘　　要：在垃圾填埋场设计中,合理地确定垃圾土的抗剪强度参数是十分重要但又困难的工作。城市固体垃圾的抗剪强度参数与正应力水平及轴向应变(或剪切位移)有相关性。根据大量的试验数据及近年来发生的垃圾填埋场失稳案例反分析的结果,建议采用双线性的抗剪强度包线来表征城市固体垃圾的抗剪强度,当正应力为0至60 kPa时,c′=22 kPa,φ′=36,°正应力大于60 kPa时,c′=30 kPa和φ′=31°。Rational determination of shear strength parameters for municipal solid waste is a very important task in landfill design, but it is really difficult. Shear strength parameters has direct relationship with the normal stress level and axial strain （shear displacement）. Based upon testing data and results of back analysis for the landfill failure cases happened in recent years, a bilinear failure envelope is recommended to represent the shear strength of municipal solid waste, which suggests that for normal stresses less than or equal to 60 kPa, shear strength parameters of c＇=22 kPa and φ＇= 36° are recommended and for normal stresses greater than 60 kPa, c＇ = 30 kPa and φ ＇=31°are recommended.

关 键 词：土力学 城市固体垃圾 抗剪强度 参数分析 

分 类 号：X705[环境科学与工程—环境工程]