Comparison of settlement behaviors of high-food-waste-content(HFWC) and low-food-waste-content(LFWC) MSWs and assessment of their prediction models  

作　　者：XU Hui QIU HaoLei ZHU Guang ZHAN LiangTong ZHANG ZhenYing XU XiaoBing CHEN YunMin WANG YuZe 

机构地区：[1]School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China [2]MOE Key Laboratory of Sofi Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China [3]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China [4]Institute of Geotechnical Engineering,Zhejiang University of Technology,Hangzhou 310014,China [5]Department of Engineering,Durham Universiy,Lower Mountjoy,South Road,Durham DHI 3LE,UK

出　　处：《Science China(Technological Sciences)》2019年第12期2271-2292,共22页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2012CB719802);the National Natural Science Foundation of China(Grant Nos.51708508,41402249);the Zhejiang Provincial Natural Science Foundation of China(Grant Nos.LY17E080021,LY15E080021);the Science Technology Department of Zhejiang Province(Grant No.2019C03107)

摘　　要：Settlement behaviors of high-food-waste-content(HFWC) and low-food-waste-content(LFWC) municipal solid wastes(MSWs) respectively from developing and developed countries were characterized and compared based on a great number of experimental datasets from references. Fresh HFWC-MSW generally has larger primary compression ratio compared to fresh LFWC-MSW, due to the release of a large amount of intra-particle water contained in food waste under additional stresses. The slopes of strain-logarithmic time curves with respect to the three secondary compression phases are characterized as "slightsteep-slight" for LFWC-MSWand "moderate-moderate-slight" for HFWC-MSW. It is difficult to distinguish the first two phases of the secondary compression in strain-logarithmic time curves for HFWC-MSW. The entropy method was built to evaluate the performance and applicability of nine published settlement models based on the settlement datasets of four large-scale experiments. The computational simplicity, the fitting performance, the prediction performance and the parametric stability were taken as the four criterions in the entropy method. Based on the evaluation results, the models proposed by Sowers et al.(1973)and Gourc et al.(2010) are recommended for predicting settlement at LFWC-MSW landfills, while the hyperbolic model and the Chen et al.(2010) model are recommended for HFWC-MSW landfills.Settlement behaviors of high-food-waste-content(HFWC) and low-food-waste-content(LFWC) municipal solid wastes(MSWs) respectively from developing and developed countries were characterized and compared based on a great number of experimental datasets from references. Fresh HFWC-MSW generally has larger primary compression ratio compared to fresh LFWC-MSW, due to the release of a large amount of intra-particle water contained in food waste under additional stresses. The slopes of strain-logarithmic time curves with respect to the three secondary compression phases are characterized as "slightsteep-slight" for LFWC-MSWand "moderate-moderate-slight" for HFWC-MSW. It is difficult to distinguish the first two phases of the secondary compression in strain-logarithmic time curves for HFWC-MSW. The entropy method was built to evaluate the performance and applicability of nine published settlement models based on the settlement datasets of four large-scale experiments. The computational simplicity, the fitting performance, the prediction performance and the parametric stability were taken as the four criterions in the entropy method. Based on the evaluation results, the models proposed by Sowers et al.(1973)and Gourc et al.(2010) are recommended for predicting settlement at LFWC-MSW landfills, while the hyperbolic model and the Chen et al.(2010) model are recommended for HFWC-MSW landfills.

关 键 词：municipal solid waste(MSW) settlement behaviour high food waste content(HFWC) low food waste content(LFWC) entropy method settlement model assessment 

分 类 号：TG1[金属学及工艺—金属学]