Dynamic response of water-rich tunnel subjected to plane P wave considering excavation induced damage zone  

作　　者：Gongliang Xiang Ming Tao Rui Zhao Huatao Zhao Muhammad Burhan Memon Chengqing Wu 

机构地区：[1]School of Resources and Safety Engineering,Central South University,Changsha 410083,China [2]School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China [3]School of Civil and Environmental Engineering,University of Technology Sydney,NSW 2007,Australia

出　　处：《Underground Space》2024年第2期113-130,共18页地下空间（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12072376 and 52274105).

摘　　要：The stability analysis of a deep buried tunnel subjected to dynamic disturbance is an important issue.In this study,the transient response has been obtained by establishing a water-rich tunnel model considering excavation damage zone(EDZ).Based on Biot’s two-phase dynamic theory and wave function expansion method,the analytical solution of dynamic response around the water-rich tunnel containing EDZ subjected to P wave is derived.Moreover,Fourier transform and Duhamel’s integral technique is introduced to calculate the transient response,and the equivalent blasting curve is adopted to input excitation function.The dimensionless parameters thickness N and shear modulus ratio lare defined to characterize the degree of damage in the surrounding rock,investigating the influencing factors,such as the parameters and the incident source frequencies.The results indicate that the dynamic stress concentration factor(DSCF)gradually decreases as the dimensionless parameters increase.Additionally,it is observed that the DSCF is more sensitive to changes in the thickness parameter N.Finally,the influence of the waveform parameters has been taken into account in the analysis of transient response,and the stress state and transfer process in each time stage of the EDZ are analyzed.This study establishes a theoretical foundation for comprehending the mechanical behavior and support design considerations associated with a deep-buried water-rich tunnel containing EDZ.

关 键 词：Water-rich tunnel Two-phase dynamic theory Wave scattering Transient response Dynamic stress concentration 

分 类 号：O17[理学—数学]