Research On Stability Analysis Of A High Slope And Optimization Design By Anti-slide Pile

In recent years,with the rapid development of modern urban construction,more and more highways have been built in the mountains with complicated geologyandterrain conditions.As a result,to meet the demand of the highway design,high slope instability problem formed by a large amount of high-filled embankment and deep-dig cut is increasing.The stability of the seven cable 12# high slope on HangXinJing Expressway was analyzed based on the limit equilibrium method.And optimization design on high slope anti-slide pile reinforcement scheme was carried out.The main research results are as follows:(1)Two-dimensional slope model is established through Rocsicence Slideaccording to the engineering geological conditions of 12# high slope.The stability coefficient of slope under the condition of natural,rainstorm,earthquake were calculated,thusthe stabilityof the slope was analyzed.(2)Through Rocsicence Slide,The sensitivity of slope stability tovarious influencing factors(geotechnical engineeringparameters,seismic coefficient,undergroundwater level)was studied based on reliability analysis method.The stability of the slope was evaluated by failure probability gained through probability analysis.(3)Three-dimensional model of the slope was established through ABAQUS.The slope seepage field and stress field were directly coupled using the fluid/stress unit to analyze the stability of the slope combining strength subtractionunder the condition of nature and storm.The results revealed the slope seepage field,plastic deformation area,the slope of the horizontal and vertical displacement points.Otherwise,the location and shape of the sliding surface of broken slope weredetermined and the slope stability was evaluated which provides the basis for slope treatment.(4)Anti-slide pile reinforcement scheme was optimized.Simulated by ABAQUS,the plastic zone,displacement and safety coefficient of slope and the displacement change law of the pile under different design parameterspile length,pile spacing and pile cross section were analyzed,thus the optimal reinforcement scheme was proposed.