CAJ | 학술논문

为了研究穿越断层的山岭隧道结构在走滑断层位错作用下的反应,基于有限元和拟静力的基本原理,建立了隧道围岩的相互作用模型,提出了一种以围岩沿断层位错为输入荷载的跨断层隧道衬砌的反应分析方法.利用有限元分析软件ANSYS的位移荷载功能,使该反应分析方法得以实现.分析过程中以上盘为主动盘,通过给上盘施加强制位移来描述围岩的错动,采用荷载步为100步的逐步加载的方式来描述围岩错动的过程.对比研究了走滑断层工况下,加载断层位错由小到大的过程中,隧道衬砌各部分的应力反应状态.结果表明:当断层位错在20 cm以下时,隧道衬砌各部分均处于安全状态;随着错动量的增大,衬砌不同部分的破坏顺序为:边墙先产生破坏,然后顶板产生破坏,最后破坏延伸至底板.
위료연구천월단층적산령수도결구재주활단층위착작용하적반응,기우유한원화의정력적기본원리,건립료수도위암적상호작용모형,제출료일충이위암연단층위착위수입하재적과단층수도츤체적반응분석방법.이용유한원분석연건ANSYS적위이하재공능,사해반응분석방법득이실현.분석과정중이상반위주동반,통과급상반시가강제위이래묘술위암적착동,채용하재보위100보적축보가재적방식래묘술위암착동적과정.대비연구료주활단층공황하,가재단층위착유소도대적과정중,수도츤체각부분적응력반응상태.결과표명:당단층위착재20 cm이하시,수도츤체각부분균처우안전상태;수착착동량적증대,츤체불동부분적파배순서위:변장선산생파배,연후정판산생파배,최후파배연신지저판.
In order to study the character of cross-fault mountain tunnel under strike-slip fault dislocation, the inter-action model between the rock and the tunnel is made on the basis of the principle of the finite element and the pseudo-static method. The method for analyzing the nonlinear responses of the cross-fault tunnel under load of fault dislocation is also developed. The analysis is performed by using the displacement function of finite element soft-ware ANSYS. The effect of fault dislocation is simulated by imposing displacement load on the hanging wall rock. The values of displacement load are imposed by 100 steps to describe the loading process. With the increase of fault dislocation, the stress states of the tunnel under the condition of strike-slip fault are analyzed. By the computation, some meaningful results have been obtained: (1) The tunnel is under safe state, when the fault dislocation is smal-ler than 20 cm. (2) The wall of tunnel is the easiest to be damaged, then the roof, and the damage to the bottom is at the last.