深溪沟电站泄洪冲沙洞进口高边坡稳定性分析  

High slope stability analysis of flood and sediment releasing tunnel outlet of Shenxigou Hydropower Station

作　　者：郭劲松[1] 张运达[1] 谢剑明[1] 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《人民长江》2010年第18期76-78,共3页Yangtze River

摘　　要：深溪沟水电站泄洪冲沙洞进水口自然边坡高陡,场地狭窄,岩体卸荷强烈,致使进口闸室段结构布置困难。边坡开挖对后坡卸荷岩体形成切脚作用,施工开挖爆破问题突出。通过对边坡地质条件进行调查研究,分析其工程地质特征,定量计算其稳定性系数,评价其稳定性,最后对进口闸室结构进行优化,不仅达到了减少投资、缩短工期的目的,而且降低了安全风险。The natural slope at outlet of flood and sediment releasing tunnel of Shenxigou Hydropower Station is high and steep, and the construction site is narrow with strung unloading, therefore, the structural layout of entrance sluice chamber is difficult. After the entrance slope was excavated, the slope foot support role was lost, resulting in difficulty of blasting. Through investigation of the geological condition, we analyzed its geological features and calculated stability index quantitatively to evaluate its stability. The structure of tunnel entrancc chamber was optimized resulting in lower investment, construction period, and construction risk.

关 键 词：泄洪冲沙洞 高陡边坡 稳定性 深溪沟水电站 

分 类 号：TV698[水利工程—水利水电工程]