西藏拉洛水利枢纽坝址选择中的地质问题

西藏拉洛水利枢纽坝址规划在峡谷河段,坝址选择中同时遇到了滑坡、崩塌、泥石流及深厚覆盖层等地质问题.局部而论,峡谷中不乏地质条件较好的坝址,但总体分析,滑坡、崩塌等地质缺陷的影响不容忽视.经全面、准确地分析上述地质问题,为坝址选择提供了可靠的地质依据,避开了影响工程的重大地质缺陷,在峡谷河段的坝址选择中具有典型性和代表性.

Geological Problems of Dam Site Selection in Lalo Hydro Project in Tibet

The dam site is usually selected in the gorge reach with lager reservoir basin and medium width,but gorge reach has some geological defects which are important factors affecting dam site selection.The dam site of Lalo hydro project in Tibet was planned in the gorge reach,and the geological problems were encountered,such as landslides,avalanches,debris flow and deep-cover,etc.In some respects,there were dam locations with good geological conditions,but in general,landslides,collapses and other geological defects couldn＇t be ignored.By analyzing geological problems mentioned above completely and accurately,reliable geological references were put forward for dam site selection,and those major geological defects affecting on projects were avoided in it.So it was typical and representatively for dam site selection in gorge reach.