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基于数值应力场的加固边坡临界滑动场
基于数值应力场的加固边坡临界滑动场
作者:danjiang 来源:本站原创 点击: 日期:2012-1-23 12:55:37 ★★★
摘 要：传统的极限平衡法广泛用于边坡稳定性，计算出的边坡安全系数在工程界普遍接受。但边坡加固后的受力较为复杂，由于极限平衡法假设条件较多，加上计算加固边坡安全系数的合理性受到质疑，所以较多地采用数值分析方法，但数值分析法不易获取工程意义上的安全系数。为此，利用数值分析法计算加固边坡应力分布，再利用临界滑动场理论搜索基于数值应力的临界滑面和计算最小安全系数。通过两种常用边坡加固方式（锚杆框格梁加固和抗滑桩加固）的分析，说明本方法在加固边坡分析中的优势和适用性。
关键词：极限平衡；边坡加固；临界滑动场；安全系数
[JZ(〗[WT3BZ]Critical Slip Field of Stabilized Slopes Based on Numerical Stress Field
TANG Zheng-dong，ZHU Da-yong，SHEN Yin-bin
( School of Civil and Hydraulic Engineering，Hefei University of Technology，Hefei Anhui 230009，China)
Abstract:The conventional limit equilibrium methods are widely used in slope stability, and the computed safety of slopes are generally accepted in engineering. However the numerical methods are gradually accepted，because as the force condition of the stabilized slopes is much complicated and too many assumptions are required in limit equilibrium methods and moreover the rationality of safety factors of stabilized slopes are controversial，but it is not easy to obtain satisfactory safety factors of slopes in engineering meaning. Using numerical method to compute stresses distribution of stabilized slopes in this paper, searching of critical slip surfaces based on numerical stresses field and computing minimal safety factors are obtained by using the theory of critical slip field. The results of analysis of the two commonly methods of slopes stabilization such as ground anchoring frames and piles showed the applicability and advantages of the method in analysis of stabilized slopes.
Key words:limit equilibrium；slope stabilization；critical slip field；safety factors
近年来国内各类大型土建工程不断涌现，导致各类高陡人工边坡的出现，边坡问题显得尤为重要，同时，边坡失稳时有发生，对人们的生命财产构成威胁。目前针对边坡稳定性分析主要有极限平衡条分法［1-2］、基于应力应变的各种数值方法［3-4］，在数值方法中，安全系数的计算大多利用计算过程中不断折减边坡强度参数最终得出一个确定的安全系数［5］。基于应力应变的
关键词：极限平衡；边坡加固；临界滑动场；安全系数
[JZ(〗[WT3BZ]Critical Slip Field of Stabilized Slopes Based on Numerical Stress Field
TANG Zheng-dong，ZHU Da-yong，SHEN Yin-bin
( School of Civil and Hydraulic Engineering，Hefei University of Technology，Hefei Anhui 230009，China)
Abstract:The conventional limit equilibrium methods are widely used in slope stability, and the computed safety of slopes are generally accepted in engineering. However the numerical methods are gradually accepted，because as the force condition of the stabilized slopes is much complicated and too many assumptions are required in limit equilibrium methods and moreover the rationality of safety factors of stabilized slopes are controversial，but it is not easy to obtain satisfactory safety factors of slopes in engineering meaning. Using numerical method to compute stresses distribution of stabilized slopes in this paper, searching of critical slip surfaces based on numerical stresses field and computing minimal safety factors are obtained by using the theory of critical slip field. The results of analysis of the two commonly methods of slopes stabilization such as ground anchoring frames and piles showed the applicability and advantages of the method in analysis of stabilized slopes.
Key words:limit equilibrium；slope stabilization；critical slip field；safety factors
近年来国内各类大型土建工程不断涌现，导致各类高陡人工边坡的出现，边坡问题显得尤为重要，同时，边坡失稳时有发生，对人们的生命财产构成威胁。目前针对边坡稳定性分析主要有极限平衡条分法［1-2］、基于应力应变的各种数值方法［3-4］，在数值方法中，安全系数的计算大多利用计算过程中不断折减边坡强度参数最终得出一个确定的安全系数［5］。基于应力应变的
文章录入：danjiang 责任编辑：danjiang
