四川省青川县东河口滑坡岩石的抗剪断性质试验

东河口滑坡是5·12汶川大地震触发的典型的高速远程滑坡，致使780余人遇难。该滑坡体主要由震旦系灰岩和寒武系炭质板岩、千枚岩构成。震后在对该滑坡进行详细野外调研的基础上，采集了具有代表性的岩块作为试验样品，利用60t液压式万能材料试验机对该滑坡岩石的抗剪断性质进行了一系列试验。试验结果表明，水对该滑坡岩体的力学性质有重要的影响，干燥状态与饱水状态下岩石的抗剪断强度有很大的差异，岩石中存在的结构面也是影响岩石力学性质的主要因素之一，是岩质边坡稳定性的一个主要控制条件。

Experimental study on shear strength of rocks from Donghekou landslide in Qingchuan County,Sichuan Province,China

Donghekou landslide, a typical landslide located in Qingchuan County triggered by the 2008 Wenchuan earthquake, with high speed and long run-out, caused more than 780 deaths. This landslide is mainly composed of Sinian limestone and Cambrian carbon slate and phyllite. After the earthquake, we investigated this landslide and collected representative rock samples. By using the 60t Hydraulic Universal Testing Machine, a series of tests had been carried out to study the mechanical properties of rocks from Donghekou landslide and significant conclusions were obtained. It’s indicated by the test results that water is an important factor for the mechanical properties of rocks, and the shear strength is quite different when in the dried status than in saturated status. Moreover, the structural surface is also critical, which can be a controlling condition for rock landslide stability.