Key Laboratory of Mechanics on Disaster and Environment in Western in China, The Ministry of Education of China, Lanzhou 730000, China.
Waste Manag. 2011 Dec;31(12):2380-90. doi: 10.1016/j.wasman.2011.07.009. Epub 2011 Aug 9.
Large-scale cyclic simple shear tests were conducted on reconstituted specimens of municipal solid waste (MSW) collected from the Tri-Cities landfill in Fremont, California, USA. The influence of waste composition and compacted unit weight on the shear wave velocity, small-strain shear modulus, and strain-dependent shear modulus reduction and damping ratio curves of MSW was investigated in these tests. Modulus reduction and damping ratio curves were evaluated over a strain range of 0.01-3%. Specimens were reconstituted using 100%, 65%, and 35%, by weight, of the material that passed through a 20mm screen and four different levels of compaction effort. All specimens were consolidated under a normal stress of 75 kPa prior to testing. The test results show a very strong dependence of shear wave velocity and small strain shear modulus on unit weight. Unit weight also had an influence on modulus reduction and damping ratio. Waste composition had a very strong influence on damping and also influenced shear wave velocity, small strain shear modulus, and modulus reduction. The interrelationship between unit weight and waste composition made it difficult to separate out the effects of these parameters.
对来自美国加利福尼亚州弗里蒙特市三城市垃圾填埋场的城市固体废物（MSW）的重构样本进行了大规模循环单剪试验。这些试验研究了废物组成和压实单位重量对 MSW 的剪切波速度、小应变剪切模量以及应变相关的剪切模量降低和阻尼比曲线的影响。在 0.01-3%的应变范围内评估了减缩和阻尼比曲线。使用通过 20mm 筛子和四种不同压实功的材料的 100%、65%和 35%（重量）来重构样本。所有样本在测试前均在 75kPa 的正应力下固结。试验结果表明，剪切波速度和小应变剪切模量与单位重量非常相关。单位重量对减缩和阻尼比也有影响。废物组成对阻尼有很强的影响，也影响剪切波速度、小应变剪切模量和减缩模量。单位重量和废物组成之间的相互关系使得难以分离这些参数的影响。
