摘要
以贵州省务川沙坝水电站高边坡为例,在地质模型建立与计算参数确定的基础上,采用卸荷岩体力学的方法进行边坡不同开挖高程的数值仿真.根据边坡开挖过程中卸荷百分比大小,划分出强卸荷区、弱卸荷区和非卸荷区,基于此对岩体力学参数进行调整.根据卸荷过程中参数的折减与边界条件的变化进行边坡卸荷过程的动态数值仿真,并与传统有限单元法计算结果进行对比分析.结果表明,基于卸荷岩体力学的动态数值仿真可以反映岩石高边坡在开挖卸荷过程中的地质-力学响应,其结果与工程地质定性分析结果比较吻合,更加符合实际情况.
Taking high cutting slope of Shaba Hydropower station as an example,on the basis of establishing the geological model of high cutting slope and determining the calculation parameters,numerical simulation in the slope cutting process is performed on the basis of unloading rock mechanics method.According to unloading percentage,slope will be divided into high unloaded zone,moderately unloaded zone and non-unloading zone.The mechanical parameters of rock mass are adjusted in each area on this basis.Comparisons are made between numerical simulation based on unload numerical simulation method,in the light of changing boundary condition and parameters reduction in the cutting process,and traditional numerical simulation method to show the unloading rock mass mechanics method is improved as taking account the geological mechanics response,the results between unloading simulation and engineering geological analysis match very well.
出处
《武汉理工大学学报(交通科学与工程版)》
2010年第6期1241-1244,共4页
Journal of Wuhan University of Technology(Transportation Science & Engineering)
基金
国家自然科学青年基金项目(批准号:40702050)
中央高校基本科研业务费专项资金项目(批准号:CUG090104)资助
关键词
高边坡
卸荷过程
卸荷区
卸荷百分比
数值仿真
high slope
unloading progress
unloading zone
percentage of unloading
numerical simulation