一个平推式滑坡的典型实例

所研究滑坡位于四川东部某市境内。该滑坡属于缓倾角岩质顺层滑坡,这类滑坡存在识别难度大、隐蔽性很强；成因机理复杂；成灾模式奇特、减灾防灾难度大、风险高等特点。本文通过成因机制及形成演化分析,再现了一个缓倾角岩层滑坡的变行破坏过程。研究表明：在降雨过程中,滑体节理裂隙发育,岩体被切割成板梁状、块状,水是透过第四系覆盖层沿滑体节理裂隙下渗到相对隔水层,在相对隔水层层面上发生面流,并同时软化相对隔水层,降低其岩土力学参数,形成软弱带。当后缘裂隙达到一定的水头高度时,形成强大的静水压力,滑体中部发生平推拉陷破坏,而滑体东部却发生平推倾倒破坏。

A classical example of translational landslide

The landslide studied is located in the eastern part of SiChuang province, which is slow-inclination bedding rockslide. It is difficult to identify for this kind of landslide, due to the strong concealment,the complex formation mechanism,the strange disaster mode and the difficult prevention and reduction of disaster .etc. Through analyzing the causes and mechanism,the formation and evolution of the landslide, This article shows the failure process of the slow-inclination bedding rockslide. Research shows thatwater is along the joints and fissures. sinfiltrates from the the quaternary overburden layer to the relative water-resisting layer in the process of rainfall. As a result,the occurrence of surface flow in the relative water resisting layer level the relative water-resisting layer soften, the mechanics parameters of rock and soil reduced, and finally the weak zone formed. At the same time, the rock was cut into the plate and block with the development of the joints and fissures.The strong hydrostatic pressure is formed after water filling the fissure , the right side of the sliding body occurred horizontal pushing trap damage, and the left side of the sliding body occurred horizontal pushing dumping damage.