【摘要】 谢家店滑坡是5.12汶川大地震触发的较为典型的高速远程滑坡之一。通过滑坡岩体碎屑动荷载力学试验以及微结构特征分析,初步探讨了强震条件下滑坡碎屑流发生的动力学机制。结果表明:红色正长花岗岩的空隙和裂隙的发育程度均高于黑褐色砂岩;随着应变速率的增加,两种岩石的抗剪强度都有相应增加的趋势,且黑褐色砂岩的强度高于红色正长花岗岩;在加载速率持续增长的情况下,两种试样抗剪断强度拟合直线斜率相同,故强度增长速率相等;汶川地震使两种岩石均达到了其抗剪强度,所以岩体的剪切破坏是导致该滑坡发生的主要原因之一。更多还原

【Abstract】 The Xiejiadian landslide,a typical landslide located in Longmen County,was triggered by the 2008 Wenchuan earthquake with high speed and long run-out.A preliminary study of the dynamic mechanics of landslide debris under strong earthquake by landslide debris rock dynamic load mechanics tests and analyses of micro-structural features were carried out.The results show that the red syenogranite is a long gap and the degree of development of fractures in the rock is higher than that in the black-brown sandstone.With the increase in strain rate,the shear strength of two kinds of rocks has a corresponding increase,and the strength of black-brown sandstone is higher than that of the red syenogranite.With the increase of loading rate,the shearing strength of two sample regression line slope is identical.Thus,the strength of growth rate is equal.Two rocks have reached their shear strength under the earthquake.Therefore,the shear failure of rock is the main cause of the landslide.更多还原