斜坡地基承载力及其影响因素的数值模拟研究

本文从数值仿真的方法入手,利用有限差分软件FLAC3D,研究了斜坡地基极限承载力的数值模拟计算方法,并分析影响斜坡地基极限承载力的因素。最后研究了极限平衡状态下滑动面的形态。结果表明,数值模拟方法克服了传统方法无法考虑土体内部应力应变关系的缺陷,可较为真实地反映斜坡内的变形、破坏过程。埋深、临坡距和地基条件与极限承载成正比关系。但埋深对极限承载力的影响不甚明显。斜坡地基极限承载力与滑动面形态及岩土体强度相关。

NUMERICAL SIMULATION RESEARCH ON THE SLOPE FOUNDATION BEARING CAPACITY AND THE INFLUENCING FACTORS

Based on the numerical simulation method, this paper has established the numerical simulation method of slope ultimate bearing capacity by using of finite difference software of FLAC3D, analyzed the affecting factors of slope ultimate bearing capacity, and at last considered the shape of the sliding surface in the limit equilibrium state. The results show that, in the numerical simulation method, the internal stress-strain relationship of soil is considered and the slope deformation and failure process can be more truly reflected, but the traditional methods can not. Depth, temporary slope distance and ground condition is directly proportional to the ultimate bearing, but the impact of depth is not obvious and the slope ratio is inversely proportional to the ultimate bearing. Slope ultimate bearing capacity is related to the morphology of sliding surface and the strength of rock mass.