崩塌形成条件及堆积体稳定性分析  

Analysis on Formation Condition of Collapse and Stability of the Deposit

作　　者：陈峰[1] 昌志军[1] 

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430000

出　　处：《路基工程》2014年第2期188-191,共4页Subgrade Engineering

摘　　要：崩塌属于比较常见的不良地质现象。崩塌的形成,一般具备某些典型的发育特征,大的区域地质构造,地层岩性及岩性的组合关系,是形成崩塌的前提条件。以贵州省道真至新寨高速公路的和平互通工程为例,采用边坡稳定性数值模拟方法,对崩塌堆积体进行稳定性分析。数值模拟法通过建模分析,可以直观地观察到边坡可能发生滑动的区域,Bishop法较精确的计算出坡体稳定系数。崩塌堆积体在自然条件下整体处于稳定状态,局部有应力集中现象,应加强防护。为设计施工提供参考。Collapse is a common bad geological phenomenon. Its formation, generally, has certain typical development characteristics, i.e. large regional geologic structure, lithology, and combination of lithologic character are the preconditions of collapse. Taking the peaceful interchange project of Daozhen-Xinzhai Highway in Guizhou as an example, stability analysis in relation to a collapse deposits was conducted by numerical simulation method for slope stability. Through modeling analysis, the area that the slope may slide could be observed directly. Then by Bishop method, the safety factor was calculated accurately. It was concluded that the collapse deposits are in a stable state as a whole under natural conditions with local stress concentration, thus it should be protected. For reference by similar design and construction.

关 键 词：崩塌形成条件 BISHOP法 有限元法 堆积体 稳定性分析 

分 类 号：P642.21[天文地球—工程地质学]