四川宣汉天台特大滑坡的成因机理及排水工程措施研究

深入分析了暴雨诱发四川省宣汉县天台乡特大型滑坡的成因机理,提出了近水平岩层特大型滑坡多级平推式滑动的模式,归纳总结了降雨降低滑坡体稳定性的因素,并通过因素敏感性分析,比较了各种因素的影响程度.在对滑坡成因机理深入研究的基础上,制定了相应的地表和地下排水工程措施.最后,根据滑坡排水系统投入正常运营后的实际排水情况和数值模拟结果,对地表排水和地下排水的效果进行了分析评价.

The formation mechanism of the Tiantai landslide induced by precipitation in Xuanhan, Sichuan and the design of drainage

This paper gives a profound analysis on the formation mechanism of the Tiantai landslide induced by precipitation in Xuanhan County, Sichuan Province and brings forward the model of the super-giant landslide with the near horizontal rock stratam and sliding in multiple-step by a horizontal push. In addition, this paper concludes the factors reducing the stability of the landslide by precipitation and compares the influential degrees of all kinds of factors by sensitivity analysis. On the basis of the thorough research on the formation mechanism of the landslide, the relevant engineering measures of the surface and the underground drainages are framed. Finally, according to the practicable draining situation after the drainage system of the landslide worked normally and the results of the numerical simulation, the effects of the surface and underground drainages are analyzed.