摘要
边坡稳定性分析的极限平衡理论中,仅考虑力的平衡的简化法(也称滑楔法)因其计算简便、快捷,广泛应用于国内外工程界。实践证明,对于圆弧滑面,滑楔法与严格条分法精度相当,但对于非圆弧滑面往往出现较大误差。根据对条间力倾角的不同假定情形,将滑楔法统分为第一类滑楔法和第二类滑楔法。建立了任意折线滑面边坡模型,以此分析滑体几何要素对各类滑楔法误差的影响,从中提取出主要影响因素。根据呈现的不同误差规律,分别提出各类滑楔法关于条间力倾角假定的统一表达式,扩展滑楔法概念,且可作为严格算法的新形式。在此基础上,提出了考虑滑体几何要素的改进措施,并予以验证。
Simplified limit equilibrium method for the slope stability analysis,which only consider the balance of forces（also known as sliding wedge method） has been widely used in domestic and international engineering for the simplicity and convenience in calculation.It has been proved that when the slip face is circle the accuracy of sliding wedge method is the same as that of rigorous method,but when the slip face is not circle sliding wedge method usually results in larger error.Based on the different assumptions of inter-slice forces＇ angle,sliding wedge method has been classified into the first sliding wedge method and the second wedge method.Then,a model of slope with a broken-line slip face has been established to analyze the impact of landslide＇s geometry elements on the errors of sliding wedge method,and the main influence factors have been found.According to the different pattern of errors,united expressions of the two sliding wedge methods about the assumptions of inter-slice forces＇ angles have been proposed respectively,which expand the concept of the sliding wedge method,and can be used as a new form of rigorous method.Based on these,some improvements of sliding wedge method,which consider the elements of landslide＇s geometry,have been presented and verified.
出处
《矿业研究与开发》
CAS
北大核心
2011年第2期21-26,共6页
Mining Research and Development
基金
中国博士后基金项目(20080431032)
江西省科技支撑计划项目
关键词
边坡稳定
极限平衡理论
滑楔法
误差分析
Slope stability
Limit equilibrium methods
Sliding wedge method
Error analysis
