摘要
采用FLAC^(3D)强度折减法并对比slide极限平衡法,分别研究断层破碎带岩土体的泊松比、抗拉强度、内聚力和内摩擦角等力学参数及断层的断距、厚度、倾角、相对临空面的距离等几何参数对岩质边坡破坏模式和稳定性的影响。结果表明:边坡的稳定性随内聚力的增大而增大,且基本不受泊松比和抗拉强度的影响,2种方法得出的内摩擦角对边坡的稳定性影响规律有所不同;断层的几何参数对边坡的破坏模式和稳定性有较大的影响,并且影响程度大于其力学参数的影响。
The influences of strength parameters( including Poisson's ratio,tensile strength,cohesion,and internal friction angle) and geometrical parameters( fault throw,thickness,dips,and distance from free face) of fault fracture zone on the failure mode and stability of rock slope were analyzed by FLAC3 Dstrength reduction method in comparison with limit equilibrium method in Slide. Simulation results indicate that the increase of cohesion could improve the slope stability while Poisson's ratio and tensile strength have barely no influence on the stability; the effects of internal friction angle on slope stability obtained from the two methods are different; in addition,the geometric parameters of rock-soil body in faults have a stronger impact on the failure modes and stability of rock slope than mechanical parameters do.
出处
《长江科学院院报》
CSCD
北大核心
2018年第1期128-132,共5页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金项目(41672317)
关键词
岩质边坡
断层
力学参数
几何参数
破坏模式
边坡稳定性
rock slope
faults
mechanical parameters
geometric parameters
failure mode
slope stability
