Stability Analysis of Landfill under Multi-Point Seismic Ground Motions Considering the Effect of Leachate
Wentao Shang 1, 2  
,   Shulin Sun 3  
,   Huanjie Liu 4  
,   Jianbo Zheng 2  
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Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong, China
College of Architectural Engineering, Binzhou University, Binzhou, Shandong, China
School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu, China
China Railway No. 10 Engineering Group Co., Ltd, Jinan, Shandong, China
Wentao Shang   

Binzhou University, No.5 Huanghe Road 391# bincheng district, 256600, Binzhou, China
Submission date: 2019-02-08
Final revision date: 2019-04-14
Acceptance date: 2019-04-24
Online publication date: 2019-10-30
Publication date: 2020-01-16
Pol. J. Environ. Stud. 2020;29(2):1331–1340
By simulating the multipoint seismic ground motions varied with time and space, which transforms into a multi-point seismic load, and introducing calculation of water pressure, the multi-point seismic stability analysis method considering leachate is derived. A method of solving safety factor and deviation analysis is proposed and the calculation program is compiled, with which the sensitivity of the influencing factors is analyzed. The results show that the safety factor when considering the leachate, which declines linearly as the leachate level increases, is smaller than that without consideration; the safety factor shows a linear decreasing trend as the specific weight γsw increases, which is more obvious as γsw increases. The effect of δp, the friction angle of the interface between the landfill and the bottom liner, on the safety factor is obviously larger than that of the cohesion cp; whatever the leachate level is, as amax, the maximum acceleration of seismic ground motions increases, and the safety factor shows a declining trend. The calculation of stability analysis considering leachate level influences the safety factor of the landfill, which has important significance for the evaluation of stability and safety of the landfill in wet and rainy areas.