摘要
针对弃渣场边坡稳定性分析问题,以新疆某水电站工程弃渣场为例,根据不计条块间作用力的瑞典圆弧滑动法原理,结合弃渣场基础和渣料物理力学参数,采用STAB软件计算在正常运用工况、地震工况和连续降雨工况条件下渣场边坡抗滑稳定安全系数,判断分析边坡抗滑稳定性是否满足规范要求。结果表明:(1)该弃渣场边坡正常运用工况和非常运用工况Ⅰ(Ⅷ度地震)下边坡稳定安全系数均满足规范要求值。在非常运用工况Ⅱ条件下,现有局部边坡仍然可能出现失稳。建议边坡单一坡度不陡于i=1∶4.0。(2)STAB软件运用弃渣场边坡稳定性分析具有较好可操作性,可为类似工程提供借鉴参考。
Aiming at the problem of slope stability analysis of waste dump,taking the waste dump of a hydropower station in Xinjiang as an example,according to the principle of Swedish circular arc sliding method without inter slice force,combined with the physical and mechanical parameters of waste dump foundation and slag material,stab software is used to calculate the anti sliding stability safety factor of waste dump slope under nonnal operation conditions,seismic conditions and continuous rainfall conditions,Judge and analyze whether the anti sliding stability of slope meets the specification requirements.The results show that:(1)the slope stability safety factor under normal operation condition and abnormal operation condition Ⅰ(Ⅷ earthquake)meets the requirements of the code.Under the abnormal operation condition Ⅱ,the existing local slope may still be unstable.It is recommended that the single slope should not be steeper than I=1:4.0.(2)Using stab software to analyze the slope stability of waste dump has good operability,which can provide reference for similar projects.
作者
常胜
Chang Sheng(Xinjiang Survey and Design Institute of Water Resources and Hydropower,Urumqi 830000,Xinjiang)
出处
《陕西水利》
2021年第9期9-12,共4页
Shaanxi Water Resources
关键词
STAB软件
弃渣场
边坡稳定性
工况
STAB software
spoil yard
slope stability
working conditions
