严子坪古滑坡的复活进程与稳定性

RECURRENCE PROCESS OF PALEOLANDSLIDES AND THEIR STABILITY IN YANZIPIN

根据优势面控坡的分析原理,综合摄绘,浅层地震,大比例尺地质填图以及实验分析与模拟反算研究结果分析,严子坪古滑坡复活是在内外动力地质作用下发生的.与古滑坡成正交的断层为滑作提供了地下水的通道,控制了滑坡体的形态,形成了滑床.人为破坏改变了自然斜坡的稳定状态,产生了初始的拉裂缝.植被破坏恶化了水文地质环境,加速了裂缝扩展的过程,最终导致古滑坡的复活.分析结果表明,目前滑坡体仍在活动.

The recurrunence process and stability of paleolandslides in Yanzipin are studied on the ground of analysis principle of controlling slop of dominat surface, experimental analysis and the results of simulating inversion, using data of comprehensive land photomapping, seismic exploration of shallow layer and large scale geological mapping. It is has been proved that the paleolandslides are recurred under the action of the extra-and endoforce. The fault orthogonal to paleolandslide become the channel of ground water and slide bed for slip mass, and controll morphogenesis of slip mass. Artificial damage change stability of natural slope, and lead to formation of tensile fissure. Because vegetation are cut off, hydrogeological circumstance is destroied, which accelerate fissure growth, and lead to recurrence of paleolandslide. It is shown that current landslide mass of Yanzipin is still active.