摘要
拉西瓦水电站为黄河上游最大水电枢纽工程。两岸边坡谷底至岸顶相对高差为600-700m^2正常蓄水位以上边坡高度约450m。坝址两岸2400m高程以上天然高边坡变形破裂体、松动体、危岩体、危石等发育广泛且小型不稳定体随机分布。高边坡稳定性构成本电站重大工程地质问题之一。且囡峡谷深切、边坡高陡，对其处理难度很大。论文首先总结了电站坝址两岸天然高边坡地质特征，对高边坡进行了稳定性分区与总体评价。在此基础上提出边坡处理原则与方案设计。最后列举了2个边坡处理典型实例，一为基于现代设计理念和新型材料的SNS柔性边坡防护系统在拉西瓦高边坡不稳定体处理中的广泛应用；另一为坝址大型变形破裂体——Ⅱ#变形体的综合治理。根据高边坡不稳定体各自不同地质特征，采用科学且针对性强的流通量措施能够达到稳定要求的。
Laxiwa Hydropower Project is the biggest waterpower pivot engineering on the upper reach of the Yellow River. The height of slopes from valley bottom to top is 680 - 700m. The height of slopes is 450 m above the normal pool level. There are deformed ＆ cracked, relaxed ＆ displaced geological bodies, dangerous rock mass, dangerous stones developed widely on the natural high slopes above elevation 2400m banks of damsite, and the small unstable geological bodies are distributed randomly. Stability of natural high slopes becomes one of the important engineering geological issues, and it is hard to take measures to improve it because of the incised river valley and the high and steep slopes. The paper firstly summarizes geological characteristics of those high slopes, and then carries out stability districts and stability evaluation for different slopes. On the base of it, the paper puts forward principle and design for slope improvement. Two typical examples of slope treatment are taken by the end of the paper. One is used SNS（Safety Netting System）, which is a kind of new material of modem design concept, widely used in the unstable geological bodies of natural high slopes on damsite riversides. The other is the integrated improvement for Ⅱ# deformation geologic body which is the biggest relaxed and displaced one on the damsite. Due to the different characters of the unstable masses in the high slopes, the scientific and objective measures for the high slopes are acceptive.
出处
《中国地质灾害与防治学报》
CSCD
2006年第4期6-10,共5页
The Chinese Journal of Geological Hazard and Control
关键词
拉西瓦水电站
两岸天然高边坡
松动体
SNS柔性防护系统
Ⅱ#变形体
综合治理
Laxiwa Hydropower Station on Yellow River
natural high slopes on damsite riversides
dynamo-relaxed rock mass
Safety Netting System
Ⅱ # deformation geologic body
integrated improvement
