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通过资料收集和大量现场调研得出西藏境内G318沿线发育重大地质灾害324处(段),其中崩塌162个,滑坡39个,泥石流88条,雪崩3处,河岸坍塌10段,冻土冻融22段。崩塌以节理裂隙切割型岩质崩塌、坡面堆积滑塌型和高陡阶地滚落型土质崩塌为主,滑坡以大型深厚堆积层土质滑坡和中小型风化卸荷型岩质滑坡为主,泥石流以降雨诱发型和冰湖溃决型为主。沿线地质灾害在地域上不均、地形地貌上散中有聚、地层岩性及高程上相对集中、年际上具有周期性及年内具有季节性的发育特点,且与人类工程活动有关的达67%以上。最后,提出了分期分批分级治理的防治思路和不同类型不同成因模式地质灾害的防治措施。
Through data collection and a large number of on-site investigations, 324 geological disasters (sections) along the G318 line in Tibet have been found, of which 162 are collapsed, 39 are landslides, 88 are debris flows, 3 are avalanches, 10 are collapsed, 10 are frozen and thawed segment. Collapse is dominated by joint-cut-fracture rock-mass collapse, slope-accumulation slump-type and high-steep terrace-type soil collapse. The landslide is dominated by large-scale deep accumulation landslide and small and medium-sized weathering and unloading rocky landslide. Debris flow Rain-induced and glacial ulcer-based. Geological hazards along the geographically uneven, terrain scattered in the poly, stratigraphic lithology and elevation are relatively concentrated, with a periodic interannual and seasonal development characteristics of the year, and the human engineering activities of up to 67 %the above. Finally, the prevention and cure ideas of phased and phased grading management and the prevention and cure measures of different types of geological disasters are put forward.