MODELLING OF BEARING CAPACITY ANALYSIS OF WASTE SOIL AT OPEN DUMPING AREA USING INTEGRATED MEYERHOF’S METHOD AND MONTE CARLO SIMULATION

In Malaysia, we have a total of 71 open dumping area and 11 sanitary landfill. These open dumping area will be closed after it has achieved it full capacity. A study to determine the bearing capacity of waste soil from open dumping area will be conducted to know the load that the waste soil can take for future development. Since the area for development is less thus it is critical to reuse the dumping area. Several studies show that the bearing capacity is the ability of the soil to safely carry the pressure placed on the soil from any engineered structure without undergoing the shear failure with accompanying the large settlement. Bearing capacity need to be estimated by numerical method with all parameter that will be find out using laboratory testing. The method that we used for calculating the bearing capacity are develop in 1940 by Terzaghi in (1943) and Meyerhof in (1953). This method was applied to the foundation for solving bearing capacity problem in the dump site. This study will used the Meyerhof's Method and Monte Carlo Simulation for bearing capacity analysis. The Meyerhof's Method will be using the geotechnical parameters such as friction angle and cohesion for the waste soil. Since the waste soil is heterogeneous which contains so many particles that comes from waste of dumping area, the selection of the cohesion and friction angle are not easy. The parameters will be simulated using Monte Carlo simulation as to get the optimized bearing capacity for the waste soil from open dumping area. After compared between the both methods of analysis, we can conclude that the maximum value of bearing capacity calculated when water table is above the lower limit of zone of influence of water table for Case 1, Case 2 and Case 3 are 25.867kPa, 25.881kPa and 26.193kPa respectively. The minimum value of bearing capacity calculated when water table is below the lower limit of zone of influence of water table for Case 1, Case 2 and Case 3 are 14.414kPa, 14.407kPa and 14.574kPa respectively.