Stability of MSW Landfill Slopes Reinforced with Geogrids

Abstract

Slope stability is one of the main problems encountered in MSW (municipality solid waste) landfill designs. Slope stability calculations become difficult due to the heterogeneous structure of MSW landfills and leachate, and therefore, slope geometries are formed by choosing low slope angles for safe designs. This causes less waste to be stored on site. This study presents slope stability analyses of MSW landfills. Numerical analyses were performed using finite element and limit equilibrium methods. The stability behavior of landfill slopes was analyzed for both unreinforced and geogrid-reinforced conditions in order to investigate the effects of shear strength parameters, the unit weight of soil waste, and material model parameters. It has been seen that the stability of landfill slopes can be increased significantly using geogrid materials. When the optimum geogrid parameters obtained from the numerical analysis results are used, it has been observed that the safety factor of the slope can be increased by up to approximately two times. Slopes in landfills reinforced with geogrid reinforcements can be formed steeper, allowing more solid waste to be stored. Considering the high initial investment cost of MSW landfills, it has been concluded that storing more solid waste with the use of geogrids will provide significant economic gains. Based on the results, the optimum values of geogrid parameters were determined and suggested for maximum reinforcing effects in MSW landfill slopes.

Stability Analysis of Filled-Slope Reinforced by Frame with Prestressed Anchor-Plates under Static Action

“…The force analysis of the soil strip on the right side of OF is similar to that in the case of slip surface 1, and the final deduced results are Equations ( 4)- (6).…”

“…In recent years, a large number of cut slopes and filled-slopes have often been produced in the process of urbanization construction. In order to prevent the occurrence of landslides, appropriate supporting structures must be adopted to reinforce the slopes [1][2][3][4][5][6]. In the project, gravity retaining walls [7,8], cantilever retaining walls [9,10], counterfort retaining walls [11,12] and anchor slab retaining walls [13,14] are generally used to reinforce filled-slopes.…”

Static and seismic stability investigation of a bamboo grid reinforced slope with different stepped reinforcing arrangements

“…The results obtained in the current investigation are validated with the results from available literatures. Keskin and Kezer (2022), carried out some parametric analysis of geogrid reinforced slope by using finite element method and limit equilibrium method. The factor of safety value varies between (1.52-1.84) with varying angle of internal friction (15°-20°), which is a good agreement of factor of safety value for unreinforced slope in current investigation.…”

A new improved particle swarm algorithm for optimization of anchor lattice beam support structures

“…Landslides represent a significant geological calamity that causes damage on the infrastructure of the surrounding areas and substantial economic losses [1,2]. To prevent such disasters, it is imperative to utilize a suitable supporting structure capable of securing the slope [3,4]. Yan-bin Wu et al [5] using advanced 3D scanner measurement technology, the influence of slope angle on the kinematics and sedimentary morphology of landslides along a low friction foundation is studied.…”