Analysis Of Dynamic Response Of Multiple Loading Force On Crossing Tunnel

With the further construction of railway networks in our country,it will attach importance to promoting the construction of high-speed passenger transport network later,appearing more and more high-speed crossing tunnels of high-speed rail way absolutly,which lies in the earthquake prone area with more and more probility.However,it is more difficult to predict and control the safety of the construction of high-speed trains when they drive through the tunnels.So,the paper mainly analyzes on the dynamic characteristcs of the tridimensional intersection tunnel,in earthquake stricken areas,which has been operated,when they are under the cimbined action of high-speed train and earthquake load.Based on the study of the corresponding laws and the tunnel structural safety,it can provide a guidance for the design of high-speed crossing tunnels.The main content can be reflected in the following aspects.(1)The dynamic response analysis of high speed train load on the structure of the tunnel under different buried depth.The paper reflects the influence of the buried depth of the high speed train on the structure of the tunnel by the acceleration response,the vertical displacement response and the principal stress response.(2)Based on the analysis of the dynamic characteristics of the tunnel in different ways on the crossing tunnels with high-speed train and earthquake load,it can get some dynamic laws.(3)Through the dynamic analysis in high-speed train load and earthquake load response of ordinary tunnels,which compared with the characteristics of crossing tunnel,it highlights the differences between crossing tunnels and ordinary tunnels with multiple loads.(4)According to the analysis of the main stress response of the tunnel structure in varous forms,it can judge the structural safety.