Investigation of the seismic behavior of gabion retaining walls in the surrounding environment of urban solid waste landfills
Volume 3, Issue 4, Winter 2026, Pages 1-18
https://doi.org/10.48306/juem.2025.549256.1109
Fazlollah Soltani, Amirhossein Mashayekhi Mazar
Abstract In the world, great dangers caused by earthquakes cause landfills to rupture A rupture in a sanitary landfill will lead to catastrophic environmental pollution, such as the contamination of the soil and the vast underground water table. Therefore, in this research, it is suggested to use a reinforced gabion wall in the surrounding environment of sanitary landfills. The implementation of this wall leads to a significant reduction in lateral movements of the landfill and finally a significant reduction in the rupture phenomenon in the landfill.
Also, the behavior of the retaining wall under dynamic load is a less well-known matter. In this study, using ABAQUS software, a number of finite element modeling has been done on a gabion retaining wall reinforced by geogrid. It has been used to perform parametric studies on the performance of retaining wall with gabion cover and geogrid network under different loads from zero to 120 kPa. Due to the similar mechanical behavior between waste and soil, researchers often use the proposed soil models to model the behavior of waste. The influential behavioral parameters of urban solid waste, equivalent to similar soil parameters including density, modulus of elasticity, Poisson's ratio and soil friction angle, are considered as the main variables. According to the obtained results, it was found that the Poisson's ratio parameter of the soil in low overburdens and the soil friction angle in higher overburdens are the factors that lead to more stress changes in the crown of the wall.
Estimating the amount of recoverable gases at the Alborz landfill site in Qom Province using LandGem software
Volume 1, Issue 2, Spring 2023, Pages 16-33
https://doi.org/10.48306/jumee.2023.399904.1008
Amin Jalayer, Ramezan Heydari
Abstract Waste management is a global issue whose importance is increasing day by day. Neglecting proper waste management has caused special problems that can be solved through the coordination of science and experience within the framework of proper management, and in this way pollution caused by landfills, including air pollution, can be minimized. In addition, optimal use of the gases produced in the landfill can be made; therefore, estimating the amount of gases that can be extracted from landfills can help in proper waste management.
The purpose of this research was to estimate the amount of extractable gases in the Alborz landfill site in Qom Province. For this purpose, the amount of waste in the landfill, the composition of the waste, and the environmental and climatic conditions of the region were entered into the LandGem software, and an estimate of the amount of extractable gases at this site was made. Considering the number of remaining cells from the Alborz site and the amount of waste production, the useful life of the Alborz site is considered to be 15 years.
After estimating the production waste, the necessary inputs for the software to estimate the recoverable gas in the period of 5 and 15 years from 2021 to 2035 have been prepared. According to the calculations made with LandGem software, the maximum amount of gas that can be extracted from the Alborz site per year for a period of 5 years is 11 million cubic meters for rapidly decomposing waste and 0.5 million cubic meters for slowly decomposing waste. Also, the maximum amount of gas that can be extracted from the landfill per year for a period of 15 years for rapidly decomposing waste
is calculated at 31 million cubic meters and for slowly decomposing waste at 1.6 million cubic meters, which can be managed and used optimally with proper planning.