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《Journal of Zhejiang University(Engineering Science)》 2014-06
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Transient response of cavity in half-space subjected to shock load

ZHAI Chao-jiao;XIA Tang-dai;DU Guo-qing;LIU Zhi-jun;MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Research Center of Costal and Urban Geotechnical Engineering ,Zhejiang University;Anhui Electric Power Design Institute;  
In order to investigate the impact of external impact force on the underground cavern and surrounding soil,the transient response to sudden anti-plane shock load of an elastic soil body half-space containing a cylindrical cavity was studied.The train impact load in tunnels was simplified to uniform sudden load along the axial direction applied on cylindrical cavity buried in the elastic soil half-space.The frequency domain solutions were obtained using residual variable method.And the Laplace numerical solutions of the problem were presented by the Laplace numerical inversion proposed by Durbin and compared with the static results.The variation of the stress and displacement with respect to the time,the propagation distance of elastic wave and the angle were presented.The results showed that:the stress and displacement of the receive point remain zero before the wave arrivals;until the shear wave strikes,the stress and displacement of that point increase abruptly,then reduce to the static value gradually;the soil displacement and stress responses attenuate along the radial direction;given a same radius,the maximum dynamic stress and displacement are almost independent of angle.However,the stable values grow up as angle increases.
【Fund】: 高速铁路基础研究联合基金重点资助项目(U1234204)
【CateGory Index】: U451
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