思林水电站船闸高边坡稳定安全分析与评价

运用ANSYS有限元分析软件,对思林水电站通航建筑物下游引航道段左岸岩体高边坡剖面P12进行稳定性分析和安全评价。根据单元的应力状态定义其安全系数,计算边坡在施工期的安全系数分布、边坡沿潜在滑动面的整体稳定安全系数,分析断层连通率对边坡安全性的影响,并对运行期校核水位和水位骤降2种工况下边坡的稳定性进行分析。计算结果表明该边坡在施工期具有少量安全裕度,但由于断层的连通率不确定,建议至少采用1根锚索加固以提高其稳定安全性;在运行期水位骤降情况下边坡稳定性有所降低,但仍可满足稳定性要求。

Stability analysis and safety evaluation for high rock slope of navigable lock of the Silin Hydropower Station

Using ANSYS software,the stability analysis of the high rock slope on the left bank in the approach channel of the navigable structure of the Silin Hydropower Station was conducted.According to the stress condition of the element,the safety factor was defined.Then the distribution of the safety factor of the slope and the safety factor of the slope along the potential slip surface were obtained and the effect of connectivity on the safety of the slope was analyzed.Moreover,the stability of the slope under the two operating modes of the check water level and rapid drawdown were analyzed.It was shown that the slope has a safety margin,but at least one anchor rope should be placed to improve the slope safety because of the uncertainty of connectivity on the fault.The slope safety under rapid drawdown in operation reduced but could still meet the stability demands.