西藏樟木口岸古滑坡变形监测分析

樟木口岸古滑坡位于喜马拉雅山脉南麓,地形陡峻,构造运动强烈,地震活动频繁,雨量丰沛,基底为前震旦系达莱玛桥组黑云斜长片麻岩、片岩,上覆第四系残坡积、崩坡积物。本文采取地表裂缝监测、地表位移监测和深部位移监测3种方法,对古滑坡的变形特征与规律进行了较系统研究分析。监测结果表明两个古滑坡未发生变形,处于稳定状态,福利院古滑坡体中部发生复活,即消防队次级滑坡,目前该滑坡处于蠕动挤压阶段,变形呈缓慢增长趋势,降雨和人为开挖坡体是滑坡复活的诱发因素。

DEFORMATION MONITORING & ANALYSIS OF ANCIENT LANDSLIDE AT ZHANGMU PORT IN TIBET

A group of huge ancient landslides locates at Zhangmu port to the south of Himalayas.The slope terrain of the landslides is steep.The regional tectonic movement is strong.Seismic activity is frequent.Rainfall is very abundant.The lower of stratum forming the landslides is biotite plagiogneiss & schist of Sinian period.The upper is eluvial deposits,colluvial deposits and deluvial materials of Quaternary period.In recent years,some of the ancient landslides moves acutely as a result of rapid town construction...