SLIDE和FLAC在某水电站边坡稳定性分析中的应用及对比  

Application and Comparison of SLIDE and FLAC in Stability Analysis for Slope of a Hydropower Station

作　　者：乐慧琳 魏继红[1] 施威[1] 宋京雷 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098 [2]江苏省地质调查研究院,江苏南京210018

出　　处：《西华大学学报（自然科学版）》2016年第1期103-107,112,共6页Journal of Xihua University:Natural Science Edition

基　　金：国家自然科学基金资助项目(41102162)

摘　　要：为比较SLIDE和FLAC这2款软件在分析边坡稳定性、计算边坡安全系数时的差异,利用这2款软件对福建省关公凹水电站某开挖边坡进行稳定性分析并求解安全系数。模拟过程中发现,SLIDE软件需要预先设定滑动面的形态和滑动面圆心的范围,滑动面形态和滑动面圆心范围设置的不同将会导致计算得到的安全系数有很大的差异,这使得SLIDE软件求解安全系数时受主观性影响大,导致误差增大。通过计算发现,运用SLIDE软件进行计算时,设置集中搜索框与否对计算所得的安全系数影响很小。与SLIDE软件不同,FLAC考虑了岩体的应力应变关系,能通过模仿材料性能找到破坏面,无需人为设置破坏面,得到的滑动面比SLIDE软件中假定的圆弧滑动面更加合理,强度折减法得到的安全系数更加准确。所得结论对其他类似工程具有一定指导作用,对使用这2款软件的业内人士有一定帮助。The analysis of slope stability is always a common problem, it is difficult in the engineering construction. Two kinds of software, namedSLIDE and FLAC, are often used to simulate the state of the slope and calculate the slope safety factor. To compare the difference between these two software in the analysis of slope stability, these two software were used to analyze the slope stability of Guangongao hydropower station in Fujian province and solve the safety factor. During the simulations, we found that the SLIDE software requires to set the shape of the sliding surface and the range of center of the sliding surface. Different sliding surface morphology and range of center result in different calculated safety factor, which makes SLIDE greatly influenced by subjectivity and leads to the error increases. We also found that centralized search box has little effect on the calculated safety factor.. Unlike the SLIDE, FLAC consid- ered the stress - strain relationship of rock. The failure surface can be found through the material properities simulation avoid setting failure surface . The sliding surface set with FLAC is more reasonable than that with SLIDE. In addition, the safety factor calculated with strength reduction method is more accurate. The results would give some guidance to the similar engineering and provide assistance for insiders who use these two kinds of software.

关 键 词：FLAC SLIDE 稳定性分析 强度折减法 

分 类 号：TU471.99[建筑科学—结构工程]