| A coaled methane processing center in Shanxi is the first coaled methane treatment plant with large-scale development and construction in China, and has an important strategic position in the development and utilization of coaled methane resources. It's located in a mountain of tens of meters height difference, and covers an area of about 100 acres. The processing center is half-dug and half-fill foundation, and the maximum filling thickness is 25 meters. The project was completed in 2009, but a large area of slope slump disaster and non-uniformity settlement have occurred after completion of the venue, which is a threat to the security of the buildings and a complete set of process facilities in central processing center. So it's very meaningful to come up with some comprehensive governance suggestions based on the analysis of the slope sliding deformation characteristics and the stability of the fill foundation.The paper summarized the deformation characteristics of the coaled methane processing center in Shanxi comprehensively based on the detailed site investigation and experiments. Then it analyzed the main influencing factors of the ground deformation and its existing hazard, the focus is on the slope stability, Through investigating the scene, understand its project geology and hydrology geological condition. Choose reasonable calculation parameters for slope stability through relevant test. On the base of holding engineering geological condition, choose the typical cross section of the safety analysis of slope engineering and establish the reasonable model of theoretical calculation.Adopt limiting equilibrium theory to analyze the stability of four slopes, calculate its safety coefficient and appraise its stability.The safety coefficients of four slopes under natural condition is respectively 1.101,1.133,1.169,1.418 and under control case is respectively 0.893,0.913, 0.990,1.004.Choose the ZSOIL numerical simulation tool as the analysis tool Which is widely used in the geotechnical engineering field. ZSOIL chooses strength reduction method for the stability criterion which is in the same principal as the conventional stability criterion. Typical cross section of the side slope is chosen for numerical simulation, the calculation model is founded according to the geological situation and landside mass characteristics. Safety factor and potential slip surface are analyzed. The safety coefficients of four slopes under natural condition is respectively 1.100,1.100,1.300,1.500, under control case is respectively 0.700,0.900, 0.900,1.000.Comparing with the two kinds of the results between the limiting equilibrium method and the simulation based on strength reduction method, It can draw the conclusion that it's feasible and practical to use the strength reduction method of ZSOIL. Through the analysis of the slope stability, combine with the characteristics of the slope and the main influencing factors.Comprehensive harnessing treatment measures can be put forward to ensure the stability of the slope. |
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