不良地质路堑高边坡的施工模拟与监测分析.pdf

第 24 卷 第 22 期 岩石力学与工程学报 Vol.24 No.22 2005 年 11 月 Chinese Journal of Rock Mechanics and Engineering Nov .，2005 不良地质路堑高边坡的施工模拟与监测分析 1 2 3 贾 娟 ，汪益敏 ，林叔忠 (1. 广州市市政园林局，广东 广州 510060 ；2. 华南理工大学 交通学院，广东 广州 510640 ；3. 广东省水利厅，广东 广州 510650) 摘要：不良地质路堑高边坡的性态受降雨、开挖等因素的显著影响，需要对施工过程进行模拟计算并及时分析现 场监测数据，掌握边坡的动态。以京珠高速公路粤境段 K108+208～+466 路堑高边坡为背景，采用有限元方法模 拟计算边坡开挖到半坡桩平台和二级平台时的应力变化和位移分布，并与监测资料对照分析，二者结论一致，均表明 边坡有深层滑动的趋势。通过深部位移资料得出边坡的滑动面位置；同时监测结果表明，降雨和开挖使边坡位移速 率显著增大。将模拟计算结果与监测数据分析相结合，进行反馈分析和动态设计，可以有效地指导施工和保证安全。 关键词：边坡工程；施工模拟；监测分析；有限元方法 中图分类号：P 642.22 文献标识码：A 文章编号：1000 –6915(2005)22 –4106 –05 CONSTRUCTION SIMULATION AND MONITORING DATA ANALYSIS OF HIGH CUT SLOPE WITH FAULTY GEOLOGY 1 2 3 JIA Juan ，WANG Yi-min ，LIN Shu-zhong (1. Bureau of City Engineering and Gardening of Guangzhou Municipality，Guangzhou 510060，China； 2. College of Traffic and Communications，South China University of Technology ，Guangzhou 510640，China； 3. Guangdong Water Conservancy Department ，Guangzhou 510650，China) Abstract ：Stability of high cut slope is influenced significantly by many factors such as rainfall and excavation， especially with faulty geology. Therefore，it is necessary to simulate excavation operation and analyze monitoring data in time for dynamic construction design. As a typical example，K108+208～+466 high cut slope in Beijing— Zhuhai Expressway with coal geology is calculated with finite element method (FEM) and monitored during excavation. FEM stress and displacement results are in good agreement with in-situ monitoring data，both indica