不同埋深矩形隧道地震响应的离心振动台试验_刘鸿哲.pdf

32 2 Vol.32 Supp.2 2013 7 Chinese Journal of Rock Mechanics and Engineering July 2013 12 12 (1. 200092 2. 200092) 3 4 U 45 A 2013)2340409 CENTRIFUGE MODEL TESTS OF SEISMIC RESPONSE OF RECTANGULAR TUNNELS AT DIFFERENT BURIED DEPTHS LIU Hongzhe12 HUANG Maosong12 (1. Department of Geotechnical EngineeringTongji UniversityShanghai 200092China 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghai 200092China) Abstract Dynamic centrifuge tests of seismic response of rectangular tunnels in sandy silt are performed. Three experiments are conductedincluding free-field testshallow tunnel test and deep tunnel test. Dynamic behaviour of the soil and tunnel is presentedincluding soil acceleration at different depthssoil displacement in the horizontal directionsettlement of the ground surface and dynamic strain of tunnels in the transverse direction. Effect of the presence of tunnel on site earthquake response as well as the difference of seismic response of tunnels at different buried depths are analyzed through contrasting the three sets of experimental data. It is concluded that the maximal seismic deformation occurs at four corners of the tunnelpresence of the tunnel changes the dynamic property of siteand seismic response of the deep tunnel is larger than that of the shallow one. Key words tunnelling engineering rectangular tunnels earthquake dynamic centrifuge test soil-structure interaction different buried depths 1