摘要
为了确定岩质边坡滑面的形态与位置信息,先选取能够体现岩体强度衰减规律的非等比强度折减法对边坡进行稳定性分析.然后以单元体最大剪应变率作为特征量,沿纵横双向路径搜索每条直线上特征量达到最大值的点,并利用高斯平滑滤波技术对这些点数据进行光滑处理,建立了一种新的岩质边坡滑面搜索方法.最终,基于该方法分析了Hoek-Brown准则各强度参数及坡形参数对边坡滑面位置的影响规律.结果表明:随着地质强度指标GSI、单轴抗压强度σci的增大或坡角β的减小,边坡滑面埋深变大;而岩石材料常数mi、扰动系数D和坡高H则对滑面位置无明显影响.
In order to determine the shape and position of slip surface of rock slope,the non-proportional strength reduction method which can reflect the attenuation law of the rock mass strength was selected to analyze the stability of the slope.Then,taking the maximum shear strain rate of the element as the characteristic quantity,a new method of searching for slip surface of rock slope was established by searching the points of the characteristic quantity reaching the maximum value along the vertical and horizontal paths and smoothing the data of these points with Gauss filter technology.Finally,based on this method,the influence of the strength parameters of Hoek-Brown criterion and the slope shape parameters on the position of slip surface of the slope was analyzed.The results show that the depth of slip surface of the slope increases with the increase of GSI,σci,and the decrease of slope angle β,respectively.However,the intact rock material property mi,disturbance coefficient D and slope height H have no obvious influence on the location of slip surface.
作者
韩龙强
严琼
曹振生
吴顺川
HAN Longqiang;YAN Qiong;CAO Zhensheng;WU Shunchuan(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of Ministry of Education for Elficient Mining and Safety of Metal Mines,University of Science and Technology Beijing,Beijing 100083,China;Power China Road Bridge Group Limited Company,Bejing 100048,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第3期471-478,共8页
Journal of China University of Mining & Technology
基金
国家重点研发计划专项资助项目(2017YFC0805303)
国家自然科学基金项目(51774020)
云南省高校科技创新团队支持计划资助。
关键词
非等比强度折减法
高斯平滑滤波技术
滑面
最大剪应变率
搜索路径
non-proportional strength reduction method
Gauss filter technology
slip surface
maximum shear strain rate
searching path
