Influence of circular road tunnel on ground motion in soft soil
YUAN Yong1,2, WANG Qi1
1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Abstract: This paper studied the seismic response law of ground motion influenced by built road tunnel at specific site conditions in soft soil. The acceleration response of ground at surface from tunnel axis horizontally was investigated when buried depth of a round tunnel and input motion of base excitation vary, in the given site, by means of numerical method. Regularized amplitude and its Fourier spectrum of acceleration response were established as a scale of the influence index. The results showed that the regularized Fourier spectrum amplitude of acceleration varies periodically with input frequency and buried depth if uniform site were supposed. Whereas at practical layered site, the regularized acceleration Fourier spectrum amplitude gradually approached constant 1.0 if the distance between the observation point and the tunnel axis increased and either if buried depth increased. Especially, when the distance between the surface and the tunnel axis exceeded 2.5D or the buried depth exceeded 2.5D, the maximum amplification of Fourier spectrum amplitude of acceleration was less than 20%.
袁勇, 王祺. 道路隧道对软土场地的地震动影响[J]. 隧道与地下工程灾害防治, 2023, 5(3): 12-18.
YUAN Yong, WANG Qi. Influence of circular road tunnel on ground motion in soft soil. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(3): 12-18.
[1] PITILAKIS K, TSINIDIS G. Performance and seismic design of underground structures[J]. Earthquake Geotechnical Engineering Design, 2014: 279-340. [2] 王国波,王亚西,陈斌,等.隧道-土体-地表结构相互作用体系地震响应影响因素分析[J].岩石力学与工程学报,2015,34(6):1276-1287. WANG Guobo, WANG Yaxi, CHEN Bin, et al. Analysis of factors influencing seismic responses of tunnel-soil-ground structural system[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(6):1276-1287. [3] ZHANG S, YUAN Y, LI C, et al. Effects of interior structure as double deck lanes on seismic performance of segmental linings[J].Tunnelling and Underground Space Technology, 2020, 103:103441. [4] WU W, GE S, YUAN Y, et al. Seismic response of a cross interchange metro station in soft soil: physical and numerical modeling[J].Earthquake Engineering & Structural Dynamics, 2021(7):2294-2313. [5] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑抗震设计规范: GB50011—2010[S].北京: 中国建筑工业出版社, 2016. [6] 同济大学,上海申通轨道交通研究咨询有限公司.地下铁道建筑结构抗震设计规范: DG/TJ08-2064—2009[S].上海:上海市建筑建材业市场管理总站,2009. [7] 袁勇,王祺,蔡雪松.深厚软土场地道路隧道结构横向地震响应分析[J].中国市政工程,2020(5):79-83. YUAN Yong, WANG Qi, CAI Xuesong. Analysis of lateral seismic response of road tunnel structure in deep soft soil area[J]. China Municipal Engineering, 2020(5):79-83. [8] 上海市隧道工程轨道交通设计研究院.道路隧道设计标准:DG/TJ 08-2033—2017[S]. 上海: 同济大学出版社, 2017. [9] ZIENKIEWICZ O C, BICANIC N, SHEN F Q. Earthquake input definition and the transmitting boundary conditions[C] //Advances in Computational Nonlinear Mechanics. Vienna, Austria: Springer, 1989. [10] 大崎顺彦. 地震动的谱分析入门[M]. 田琪, 译. 北京:地震出版社, 2008. [11] KRAMER S L. Geotechnical earthquake engineering[M]. Washington, US: Pearson Education India, 1996.
2023, Vol. 5 
