建兴高速公路节理岩体高边坡施工块体滑落模拟  

The Simulation of Jointed Rock Slope Block Sliding Process in Jianxing Highway

作　　者：任刚 刘涛 饶文杰[2] 冯玉发 冯阳飞[2] 

机构地区：[1]中交一公局第一工程有限公司,北京102205 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《水利与建筑工程学报》2014年第5期62-65,92,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(51179031;51074042);国家自然科学基金外国青年学者研究基金(51250110531;513111173);国家重点基础研究发展规划项目(973计划项目2013CB227902);地质灾害防治与地质环境保护国家重点实验室(SKLGP2014K011);中交一局建兴高速公路高边坡项目(2013-0-1-01136)

摘　　要：节理发育岩质高边坡施工过程中,其滑落破坏机理主要取决于岩体的不连续性。采用非接触摄影测量技术采集结构面信息,导入文献[1-2]开发的GeoSMA-3D系统,建立了边坡岩体空间的确定性结构面和随机性结构面数值模型,搜索出关键块体并确定关键块体的位置。在此基础上,利用非连续分析系统3DEC软件对该模型的边坡破坏过程进行仿真模拟分析,记录关键块体的速度、位移示意图。数值模拟表明边坡开始破坏的位置是被检测的关键块体的位置,随着计算时步的增加,边坡的变形逐渐增大,揭示了岩体边坡渐进破坏的演化过程,结合辽宁建兴高速公路小盘岭边坡工程算例,分析了岩体边坡的破坏运动模式,为设计施工提供技术支撑。In the construction process of a high joint rock slope ,its failure mechanism depends mainly on the slipping rocks’ discontinuities .Here ,the non-contact photography measurement technique was used to collect information of the structural planes ,and then the data was imported into GeoSMA -3D system to establish the spatial numerical model of slope rock mass with deterministic structural plane and random structural plane .In this way ,the key blocks can be de-fined in terms of dimensions and positions .Based on this ,3DEC software was used to simulate and analyze the progressive failure process of slope model ,and record the velocity and displacement of the key blocks .The numerical simulation demonstrated that the location of the first sliding block on the slope surface was the position of the key block to be moni-tored .With the increasing of the iteration interval ,the slope deformation gradually increased .This not only verified the accuracy of the GeoSMA -3D system in searching key blocks ,but also clearly revealed the progressive failure process of the rock slope .Combining with the engineering example of Jianxing Highway in Liaoning Province ,the failure mechanism of Xiaopanling rock slope was analyzed .This result will provide technical references for the design and construction of rock slopes .

关 键 词：边坡失稳 数值模拟 

分 类 号：TU475[建筑科学—结构工程]