鄭石高速公路黄庄边坡稳定性分析.docVIP

郑石高速公路黄庄边坡稳定性分析 徐德敏 （ 中国地质大学（武汉） 工程学院，武汉 430074） 摘 要：岩体的力学性质及其力学作用主要受控于岩体中的结构面以及由此而形成的岩体结构，因此在裂隙岩体中开挖的路堑边坡变形破坏机理十分复杂。在工程地质勘察基础上，根据室内岩石试验成果，结合必要的反映岩体结构和工程地质条件的实测指标，依据现行有关规范对边坡岩体进行工程分类，按经验估算方法确定岩体及结构面的力学性质参数。以此为依据，分别采用极限平衡理论和模糊数学方法对裂隙岩体中开挖的路堑边坡进行赤平极射投影分析和模糊综合评判，综合分析路堑边坡稳定性，并结合用有限单元法对在裂隙岩体中开挖路堑边坡全过程进行模拟，进一步揭示裂隙岩体边坡变形破坏机理，为边坡处治提供依据。 关 键 词：高速公路；裂隙岩体；边坡稳定性；极限平衡理论；模糊数学方法；有限单元法 中图分类号：TU452；U416.1+4 文献标识码：A Stability Analysis of the Huangzhuang Slope in ZhengShi Expressway Xu De-min ( School of Engineering, China University of Geosciences, Wuhan 430074, China) Abstract:The mechanical properties and responses of rock mass are mainly controlled by its inner structural planes and what type of structure they build.. As a result, it is extraordinarily complicated that how the cutting slopes cut in jointed rock mass deform and destroy. Basing on engineering geologic investigation and abiding by some present norms concerned, mechanical property parameters of the rock mass and structural planes are acquired by experiential estimating according to the indoor testing results of the rock and some indispensable actual parameters describing the structure of rock mass and engineering geologic conditions. According to the parameters acquired above, stability of the cutting slope is synthetically analysed by stereographic projection analysing and fuzzy synthetical judging based on limit equilibrium theory and fussy mathematic method respectively. The entire excavating processes of the slope cut in jointed rock mass are simulated with finite element method in order to take a farther step to reveal how it deform and destroy，so that evidence for slope controlling is provided. Key words: Expressway；Jointed Rock Mass；Slope stability；Limit Equilibrium Theory；Fussy Mathematic Method；Finite Element Method  1 引言 郑石高速公路是河南省高速公路网的重要组成部分，地处中原腹地，东接郑州市西南绕城高速公路，途经郑州、新郑、新密、长葛、禹州、郏县、宝丰、鲁山，止于国道G311，全长182.25km， 是一条新的区域能源和旅游大通道的中央辐射线。K0+000~K149+334.269段位于平原微丘区，设计行车速度120km/