摘要
首先探讨了有限差分法自身的误差,提出了合理的网格密度及边界条件;然后,通过与极限平衡法的比较,研究了剪胀角、抗拉强度、泊松比及弹性模量对边坡安全系数的敏感性以及对边坡变形特征的影响。研究表明:剪胀角、泊松比和弹性模量对边坡破坏时变形的影响较为明显,但弹性模量相对泊松比更为明显,抗拉强度较小时对边坡变形有影响。
Firstly,the error of finite difference method is discussed,and then reasonable mesh density and boundary conditions are pointed out.Secondly,compared with the limit equilibrium method,the dilatancy angle,tensile strength,Poisson＇s ratio and elastic modulus have some effect on the sensitivity of safety coefficients and the deformation characteristics of the slope.Results of the research show that： the dilatancy angle has the most obvious effect on the safety coefficients of slope;when tensile strength is relatively smaller,it has certain influence;Poisson＇s ratio and elastic modulus have no obvious influence on safety coefficients;the dilatancy angle,Poisson＇s ratio and the elastic modulus are of relatively obvious influence to the slope destruction,but compared with Poisson＇s ratio,elastic modulus is more apparent;when tensile strength is relatively smaller,it has influence on the slope deformation.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2010年第5期737-740,799,共5页
Journal of Chongqing Jiaotong University(Natural Science)
基金
教育部科学技术研究重点项目(210176)
重庆市教委科技项目(KJ100426)
关键词
强度折减法
安全系数
剪胀角
抗拉强度
泊松比
弹性模量
strength reduction method
safety coefficients
the dilatancy angle
tensile strength
Poisson＇s ratio
elastic modulus
