摘要
望霞大斜坡位于重庆市巫山县巫峡北岸横石溪背斜核部。由于软硬相间的地质结构,望霞大斜坡发育危岩体、滑坡多处。根据地质灾害历史和崩滑体的空间分布,该区域存在崩塌-滑坡链式地质灾害。从望霞大斜坡地貌演化过程来看,其变形改造一方面与河流下切密切相关,另一方面与自身的地质结构相关,而后者在第四纪以后起着主导作用。现今受采矿及水库蓄水的影响地貌改造进程会加速。通过坡形对比,望霞大斜坡存在的直接地质灾害问题是危岩体崩塌,间接地质灾害问题是因崩塌而产生的滑坡。通过调查,该大斜坡长期稳定性差。目前桐心村危岩体变形剧烈,一旦失稳造成的后果较为严重。基于这些认识,建议该区域进行生态移民,对桐心村危岩体进行工程治理,并加强向家湾滑坡后缘陡崖危岩的监测。
Wangxia slope is located in the core of Hengshixi Anticline in the north side of Changjiang River in Wushan County,Chongqing City.Because of its soft-hard interbed structure,there developes many dangerous rockmass and landslides.According to local geohazard history and geohazard spacial distributing,there presences rockfall-landslide chain geohazard in this region.From the geomorphic evolutionary process of Wangxia slope,Wangxia Slope＇s deformation rebuilding is related with stream trenching.On the other side,it is related with its geological structure,the latter may be the principal factor after Quatenary.Nowaday,mining and reservior impounding accelerates slope geomorhpic evolution.Compared with slope form,the direct geohazard is rock falling,the indirect geohazard is landslide,the slope long-time stability is bad.In short time,Tongxintun Dangerous rockmass deforms seriously,its stability is bad,which will results seriously consequence.Based on these ackownledge,this paper suggests the local move to somewhere safety,and some engineering measurement should be made to Tongxincun Dangerous rockmass,also monitoring should continues to do the cliff of Xiangjiawan landslide tail shirt.
出处
《水土保持研究》
CSCD
北大核心
2011年第1期82-86,共5页
Research of Soil and Water Conservation
基金
中国地质调查局地质灾害项目(1212011014027)
