Research on Cut Reinforcing Structure of Slide of Lindai-Zhijing Rail way Based on Innovative Approach

K52 slide of Lindai-zhijing railway is giant. Railway passes through the middle of the landslide in a form of cutting subgrade so that the glide force is very huge with the maximum value of 4 200 k N / m. In addition,due to the weak foundation rock which is batt and carbonaceous shale,it is very difficult to reinforce the landslide. Therefore,it is very important to select an economic and reasonable reinforcing structure to control the project investment and construction period. The selection of reinforcing structure is analyzed based on the applications of innovative theories and methods,which concluds: 1. Reinforcing piles on the both sides of cutting subgrade is the conflict zone of the system; 2.The core problem of the system is that the cantilevers of side piles on the top of the slide cutting are high,so the ability of resistance to slide thrust is restricted,and the side piles on the bottom of cutting cannot resist to slide thrust; 3.Frame type slide-resistance pile is an appropriate reinforcing structure for the landslide cutting subgrade under the present technology.