土工基础

›› 2011, Vol. 25 ›› Issue (6): 17-.

• 工程实录 • 上一篇    下一篇

水绥公路阶梯边坡强度参数反演分析

  彭金宇1，刘永莉2, 彭小毛1， 吴建良1   

  1. (1.中国建筑第五工程局有限公司，长沙 410004; 2.兰州城市学院数学学院，兰州 730070)
  • 收稿日期:2011-03-29 出版日期:2011-12-20 发布日期:2012-01-15
  • 作者简介:彭金宇，男,1983年生，工程师，2007年毕业于湖南文理学院，现任项目部技术员，主要从事工程测量工作。

Back--Analysis of Strength Parameters of Stepped Cut Slopes in Shuisui Highway

PENG  Jin  yu1， LIU  Yong  li2, PENG  Xiao  mao1， WU  Jian  liang1，   

  1. (1. China Construction Fifth Engineering Division Corp.， Ltd， Changsha 410004; 2. College of Mathmatics, Lanzhou City University, Lanzhou Gansu 730070, China)
  • Received:2011-03-29 Online:2011-12-20 Published:2012-01-15

摘要： 云南省水绥二级公路某路段为阶梯形人工松散质岩质边坡，根据该路段典型的边坡剖面形状，结合具体的工程地质条件，用极限平衡法进行搜索,分析其局部及整体最危险滑移面，计算结果表明：最危险滑移面在天然和饱水软化条件下的安全系数均小于1.0，坡体均不稳定。从该边坡目前的状态看，它是稳定的，而且历史上降雨作用下也没有滑塌记录，针对这一问题，通过对松散体强度参数进行反演分析，最后给出了建议的参数值，为该路段边坡的稳定性评价分析提供可靠的技术支持。

关键词: 岩石边坡, 极限平衡法, 边坡稳定性评价, 参数反演

Abstract: Stepped cut slopes in loose rock masses were constructed adjacent to the Shuisui Highway, Yunnan Province. Based on the typical slope cross sections and typical subsurface geotechnical conditions, both the local and overall critical slip surfaces are computed by using the limit equilibrium search method. The results indicate that the factors of safety under both natural and fully softened conditions are less than 1.0. The constructed stepped cut slopes appear to be unstable. However, it is observed that current slopes are stable and no historical records of any slope failures are evident, even under rainfall conditions.  These cut slopes were back\|analyzed to re\|evaluate the strength parameters of the loose rock masses based on the observed stable conditions. The back\|analyses provide more reasonable strength parameters for the geo\|materials and also improve the reliability of the evaluations of cut slope stabilities.

Key words: rock slopes, limited equilibrium method, slope stability evaluation, back-analysis , 