三峡库区名山滑坡稳定性的计算分析

Analytical and Calculative Method of Stability of MingShan Landslide in the Three Gorges Reservoir Area

三峡大坝建成蓄水后 ,无疑将导致部分古滑体的复活和新滑体的产生 ,对三峡库区的城镇建设、交通安全等造成一定影响。针对三峡库区的实际情况 ,以重庆市丰都县名山滑坡为例 ,具体考虑了旱季 (天然状态 )、雨季 (暴雨或长期降雨状态 )、旱季 + 175m库水位、雨季 + 175m库水位、旱季 +地震、雨季 +地震、旱季 + 175m库水位 +地震、雨季 + 175m库水位 +地震、旱季 +库水位由 175m下降至 14 5m、雨季 +库水位由 175m下降至 14 5m等 10种计算工况 ,并给出了相应的作用荷载体系 ,提出了相应评价库岸滑体稳定性分析计算方法。

After the dam of the Three Gorges is built, the raising water will inevitably cause the revival of the part of ancient landslide and the generation of new landslide ,which will influence the town development and traffic safety in the Three Gorges Reservoir Area. In the light of the specific conditions of the Three Gorges Reservoir Area, this paper, taking Fengdu's MingShan landslide in Chongqing for an example, has considered ten typical calculative projects, offered the correspondent load systems acting on the sliding mass and put forward the analytical and calculative method to evaluate the stability of a landslide. The ten typical calculative projects include dry season(natural state), raining season (rainstorm or rain for a long period of time), dry season and water level (175m ) of the reservoir, raining season and water level (175 m) of the reservoir, dry season and earthquake, raining season and earthquake, dry season and water level (175 m ) of the reservoir and earthquake, raining season and water level (175 m) of the reservoir and earthquake, dry season and water level lowered from 175 m to 145 m, raining seasons and water level lowered from 175 m to 145 m, and so on.