Optimal Design Of Anti-slide Pile Using Shear Strength Reduction Finite Element Method

The landslide problem has been a hot topic in the engineering field. With the occurrence of the slope disaster, a series of new problems have not been set up. Anti-slide pile is the most commonly used supporting and retaining structure, because of its simple construction, safety performance excellence has been widely used, the anti-slide pile types and the design method of the constantly changing, for example, anchor anti-slide pile, embedded anti-slide short pile and so on.Academician Zheng Yingren earliest use of strength reduction fem analysis of slope stability. And then it is extended to the design of anti-slide pile, The paper also uses this method proper pile length of the anti-slide pile, installation position(cross section of the pile installation position) and embedded anti-slide piling. In the second section of Nanjing-Hangzhou passenger dedicated DK121 + 525 ~ + 665 on the right subgradet of large landslide instance the background to simulate the slide pile piles sustained force and displacement trend slope, in order to achieve the best anti-slide pile installation scheme.(1) the use of MIDAS / GTS software simulation single row installation position of the anti-slide pile and proper pile length, mechanical strength reduction of slope using parameters were simulated from the toe of the slope 0 m, 20 m, 25 m, 30 m four under case the safety factor and the pile length of 17 m, 19 m, 21 m, the safety factor under four different piles 23 meters long case, the safety factor can be derived from the slope angle of 30 meters Friction pile optimal installation position, 21 meters long pile of porper pile length.(2) to obtain the optimal solution on the basis laid sliding piles to balance landslide displacement. And simulation from toe 40 m, 45 m, 50 m, 55 m, 60 m and 18 m of pile length,21 meters, and displacement of slope safety factor of 23 meters under different circumstances,and the force of the pile can be drawn from the foot of the pile 50 meters long and 21 meters for the best solution stabilizing piles.(3) introducing the application of anti-slide pile short, from the slope top analog 0 m, 1.5m, 2.5 m, 3.5 m, 4.5 m, 5.5 m under six different circumstances displacement of the slope, by the displacement graph shows that take away from the slope topl 3.5 meters long anti-slide pile short pile optimal solution in this instance.(4) combination of Nanjing-Hangzhou Passenger Railway second section DK121 + 525~ + 665 right side of the large-scale landslide instance, using strength reduction fem ofsingle-row pile soil around the c,? value reduction. In single-row pile out of action, and predicts the slip plane and slip degree slope. The addition of the second row of stabilizing piles make it slip slope Reinforcement for in this case. Simulation respectively from the foot of the slope 15 m, 20 m, 25 m, 19 m and 30 m of pile length 21 m, the slope of the force and displacement under different circumstances pile of 23 meters, 20 meters to obtain from the foot of the slope pile length of 23 meters at the anti-slide pile is the best option.