Optimized Research On The Grouting Measure Of The Portal Sect Of Cheyang Tunnel In Ya'lu Speedway

Along with the development of west regions, large numbers of roads and tunnels are built one after the other. But for geological structure in the western region is unstable, it is unavoidable to construct tunnels in the high seismic intensity location during large-scale fundamental construction of transportation. So the research in this paper has its high value in engineering and social meaning. The paper give numerical analysis for seismic dynamic response of tunnel structure in different wall rock grouting by the way of finite difference method. Research work mainly contains following parts:1,Analyzing the quake harm data about tunnels and underground structure home and aboard, summing up the breakage patterns, influence factor and breakage mechanism of quake harm. Then introducing motivity response calculation theory of tunnel and underground structure briefly.2,Optimizing the research on physical and mechanical parameter of wall rock grouting in tunnel portal. It analyzes the seismic dynamic response of wall rock in tunnel portal after the whole chain grouting alternately though calculation on the seismic dynamic response and gives suggestive number for wall rock grouting parameter.3,Optimizing the research on the thickness of wall rock grouting in tunnel portal. By calculating seismic dynamic response of tunnel structure in different thickness of grouting, it summarizes the rules of seismic dynamic response in tunnel portal after the whole chain grouting and put the best thickness of the whole chain grouting.4,Comparative reseach on different ways of grouting of wall rock in the portal. It analyzes calculation of seismic dynamic response of wall rock in tunnel portal in different ways of grouting though calculation on seismic dynamic response in different ways of grouting. It points that the best way of grouting in tunnel portal.