Grouting Study On Seismic Dynamic Response Of Xudianzi Highway Tunnel

Because of some highway tunnels constructed at high seismic intensity location, it is necessary to be studied on highway tunnels in seismic response and the corresponding measures of aseismic and shock absorption. This paper is research on seismic dynamic response of Xudianzi tunnel, and numerical modeling is applied to analyzing seismic dynamic response rules of the tunnel, based on the soil-structure interaction model, adopting viscous-elastic boundaries and time domain analysis approach, finite element method is carried out to simulate the responses of the tunnel lining to earthquake. For the most part, three grouting methods are compared with each other. This paper's contents are summarized as following:1. The measure of loop grouting is analyzed by the way of numerical modeling to get the peak value of pressure and displacement. The numerical results are compared with those results which do not adopt shock absorption measures.2. The measure of interlayer grouting is analyzed by the way of numerical modeling to get the peak value of pressure and displacement. The numerical results are compared with those results do not adopt shock absorption measures.3. The measure of asymmetry grouting is analyzed by the way of numerical modeling to get the peak value of pressure and displacement. The numerical results are compared with those results do not adopt shock absorption measures.4. Further more, the peak results of pressure and displacement of those three grouting measures are compared with each other, and the influences of variations grouting are summarized.By the above study, the following conclusions are reached:grouting measures arepropitious to shock absorption of the tunnel lining. If the quality of grouting can beassured that the horizontal displacement,shearing force and axial force of the tunnellining will minish to a large degree. But the effect upon bending moment is notnotable...