摘要
牛栏江红石岩堰塞湖因地震而形成右岸高边坡高达620 m,地形、地质条件异常复杂,需开挖的边坡陡峭而处于不稳定状态,外部扰动极易引发边坡失稳,需采取开挖及喷锚支护处理。由稳定性分析表明,边坡顶部裂缝对边坡稳定性影响明显,故对边坡EL.1 750 m采用浅孔弱差控制爆破法进行开挖。支护施工中,由于EL.1 470 m^EL.1 750 m间高差大,支护施工难度高,遂采用吊篮喷护施工,并分设8道栈桥。通过对堰塞湖边坡的成因分析,提出初步处理方案。
Hongshiyan bammed Lake in high slope on right bank up to 620 m formed by the earthquake,topographic and geological conditions are very complex,The stability analysis shows that slope at the top of the crack has a significant effect on the stability of the slope,so the slope EL. 1750 m elevation above the site of dredging,according to the characteristics of the project with the shallow hole weak poor controlled blasting excavation. Supporting construction due to the EL. 1470 m to EL. 1750 m height difference between large,supporting the construction of high difficulty,in the design and construction of the nacelle spray support construction,and is divided into eight trestle.Through analyzing the cause of the lake slope,this paper puts forward a preliminary scheme.
出处
《水利科技与经济》
2016年第1期15-17,共3页
Water Conservancy Science and Technology and Economy
关键词
高边坡
整治
技术研究
红石岩堰塞湖
high slope
treatment
technology research
Hongshiyan bammed Lake
