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《Journal of Zhejiang University(Engineering Science)》 2009-04
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Strain analysis of intermediate liner system in vertical expansion landfill

GAO Deng,ZHU Bin,CHEN Yun-min,LIN Wei-an(MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University,Hangzhou 310027,China)  
The existing method ignored the lateral movements of old landfill in calculating the tensile strain of intermediate liner system.A numerical analysis method was presented to simulate the total settlements and lateral movements of old landfill in order to solve the problem.Simplified constitutive models were chosen for the waste so that the maximum settlement of old landfill was equal to that calculated by the conventional one-dimensional settlement analysis.Then the lateral deformations of old landfill can be determined.A vertical expansion landfill case was analyzed.Results show that the simplified constitutive models for the waste such as Mohr-Coulomb(M-C) model or Duncan-Chang(D-C) model can effectively simulate the total settlements of old landfill.The lateral movements of old landfill can heavily influence the tensile strains of intermediate liner system and the existing method may obviously underestimate the actual values.
【Fund】: 国家自然科学基金资助项目(50538080);; 国家杰出青年科学基金资助项目(50425825)
【CateGory Index】: TU441
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