基于正交试验的边坡稳定性影响因素敏感度分析
|
摘要
结合一个简单土坡算例,验证了基于有限元强度折减理论的PLAXIS程序的可行性,并通过正交试验方法分析了边坡的不饱和重度、弹性模量、泊松比、黏聚力以及内摩擦角5种影响因素的变化对边坡稳定性结果的敏感度大小,由各极差值大小比较得出边坡的抗剪强度指标内摩擦角与黏聚力2个因素对边坡稳定性的影响最为重要。
A simple soil slope calculating case was used to validate the feasibility of PLAXIS procedure which based on the finite element strength reduction FEM,then analyzed the sensitivity size of the five factors by orthogonal test,such as unsaturated weight,elastic modulus,Poisson′ s ratio,cohesion and internal friction angle.At last,obtained the conclusion that shear strength index size internal friction angle and cohesion were the most influence factors in the slope stability analysis by comparing the calculated range.
A simple soil slope calculating case was used to validate the feasibility of PLAXIS procedure which based on the finite element strength reduction FEM,then analyzed the sensitivity size of the five factors by orthogonal test,such as unsaturated weight,elastic modulus,Poisson′ s ratio,cohesion and internal friction angle.At last,obtained the conclusion that shear strength index size internal friction angle and cohesion were the most influence factors in the slope stability analysis by comparing the calculated range.
引文
[1]黄盛铨,刘君,孔宪京.强度折减DDA法及其在边坡稳定分析中的应用[J].岩石力学与工程学报,2008(S1):2 799-2 806.
[2]陈力华,靳晓光.有限元强度折减法中边坡三种失效判据的适用性研究[J].土木工程学报,2012,45(9):136-146.
[3]王创业,曾祥柱,栾春雪.基于正交试验的锦界煤矿开采沉陷影响因素分析[J].煤炭技术,2015,34(2):1-3.
[4]张健,孙巧根,长铮.基于正交试验的方法分析边坡稳定性影响因素的显著性[J].中外公路,2005,25(5):8-11.
[5]刘鹏君,罗维,康安栋,等.基于Plaxis基坑复合喷锚支护的有限元分析[J].煤炭技术,2016,35(12):71-73.
[6]唐晓松,郑颖人,邬爱清,等.应用PLAXIS有限元程序进行渗流作用下的边坡稳定性分析[J].长江科学院院报,2006,23(4):13-16.
[7]吕晓光,崔可锐,李丹,等.基于Plaxis的土质边坡稳定性影响因素分析[J].安徽建筑工业学院学报:自然科学版,2010,18(3):67-71.
[2]陈力华,靳晓光.有限元强度折减法中边坡三种失效判据的适用性研究[J].土木工程学报,2012,45(9):136-146.
[3]王创业,曾祥柱,栾春雪.基于正交试验的锦界煤矿开采沉陷影响因素分析[J].煤炭技术,2015,34(2):1-3.
[4]张健,孙巧根,长铮.基于正交试验的方法分析边坡稳定性影响因素的显著性[J].中外公路,2005,25(5):8-11.
[5]刘鹏君,罗维,康安栋,等.基于Plaxis基坑复合喷锚支护的有限元分析[J].煤炭技术,2016,35(12):71-73.
[6]唐晓松,郑颖人,邬爱清,等.应用PLAXIS有限元程序进行渗流作用下的边坡稳定性分析[J].长江科学院院报,2006,23(4):13-16.
[7]吕晓光,崔可锐,李丹,等.基于Plaxis的土质边坡稳定性影响因素分析[J].安徽建筑工业学院学报:自然科学版,2010,18(3):67-71.