Recent Advances in Seismic Design of MSW Landfill Considering Stability
Pseudo-dynamic limit equilibrium-based analytical solutions to predict the sliding failure of MSW landfill under seismic conditions have been proposed. The proposed methodology incorporates the influences of time period and phase in the analyses. Various
- PDF / 305,916 Bytes
- 7 Pages / 439.37 x 666.142 pts Page_size
- 95 Downloads / 234 Views
Recent Advances in Seismic Design of MSW Landfill Considering Stability Deepankar Choudhury, B. Giridhar Rajesh, and Purnanand Savoikar Abstract Pseudo-dynamic limit equilibrium-based analytical solutions to predict the sliding failure of MSW landfill under seismic conditions have been proposed. The proposed methodology incorporates the influences of time period and phase in the analyses. Various MSW landfills with sidehill configurations founded on (a) horizontal and partly sloping base, (b) sloping base and (c) stepped base are analysed. Results are presented in terms of yield acceleration coefficient. Neglecting seismic vertical acceleration brings about 14–28% increase in yield acceleration coefficient for the case of stepped base. The influence of landfill length to height (L/H) ratio is more prominent for the landfill founded on sloping base. Coefficient of yield acceleration is increased by 36%, with increase in L/H ratio from 2 to 10. These results with proposed methodology can be used for seismic design of MSW landfill considering sliding stability. Keywords MSW landfill • Seismic design • Stability • Dynamic properties • Pseudo-dynamic
D. Choudhury (*) Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India Academy of Scientific and Innovative Research (AcSIR), New Delhi, India e-mail: [email protected] B.G. Rajesh Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India e-mail: [email protected] P. Savoikar Department of Civil Engineering, Goa College of Engineering, Ponda, Goa 403401, India e-mail: [email protected] © Springer Nature Singapore Pte Ltd. 2017 G.L. Sivakumar Babu et al. (eds.), Geoenvironmental Practices and Sustainability, Developments in Geotechnical Engineering, DOI 10.1007/978-981-10-4077-1_4
31
32
D. Choudhury et al.
4.1 Introduction Safe design of municipal solid waste (MSW) landfill systems in earthquake-prone areas is crucial as collapse of landfills can result in groundwater contamination with leachate and can induce associated geoenvironmental risks. Failures of landfill components due to seismic forces were described by Augello et al. (1995), Orr and Finch (1990) and a few others. Seismic stability is normally estimated using the limit equilibrium slope stability analysis or by analysis of permanent deformations caused by earthquake using conventional pseudo-static approach. Sarma (1975) studied the seismic slope stability and concluded that the seismic sliding displacements are not affected by the direction of inertia force, which results in least yield acceleration. Matasovic (1991) proposed solutions for computing yield accelerations of slopes. Shewbridge (1996) presented simplified method of limit equilibrium for estimation of yield acceleration of lined landfills which are subjected to horizontal seismic acceleration for the case of sidehill landfills. Ling and Leshchinsky (1997) suggested two-part failure wedges for the stability analysis of landfill considering both seismic horizontal
Data Loading...
