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宝兴县潘族组崩塌位于“5.12”汶川地震重灾区四川省宝兴县,地震诱发多处危岩体崩塌失稳,造成崩塌滚石地质灾害。受地震效应作用,危岩体后缘拉裂隙逐渐被贯通,形成抛射型崩塌模式。滚石运动路径主要受滚石形状、起始运动方式、坡面特征和坡体形态等因素的影响。通过调查滚石与坡面碰撞留下的地质痕迹,真实复原了滚石运动路径。依据坡度、坡表覆盖层厚度、植被发育程度等,选择碰撞恢复系数,计算滚石运动参数。计算结果与调查滚石运动的最远距离相差5.4 m,误差范围较小,能为滚石防治措施设计评价提供必要的参考。
The collapse of Pansu Formation in Baoxing County is located in Baoxing County, Sichuan Province, hardest hit by the “5.12 ” Wenchuan earthquake. Collapse of many dangerous rock masses caused by the earthquake has collapsed and instability, resulting in the collapse of the rolling stone geologic hazards. Affected by the earthquake effect, the tensile fracture of the dangerous rock body is gradually penetrated to form a projectile collapse mode. The path of rolling stones is mainly affected by such factors as the shape of rolling stones, the way of initial movement, the characteristics of slope and the shape of slope. By investigating the geological marks left by the collision between the rolling stones and the slope, the path of the rolling stones is truly restored. Based on the slope, the cover thickness of the slope surface, the degree of vegetation development and so on, the collision recovery coefficient is selected and the parameters of the rolling stone are calculated. The difference between the calculation result and the farthest distance of the investigation of the stalagmite motion is 5.4 m with a small error range, which can provide the necessary reference for the design and evaluation of the prevention and control measures for the rockfall.