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Scattering of Cylindrical SH Waves by Underground Circular Inclusion and Lined Tunnels

Author: ZhangMin
Tutor: LiangJianWen
School: Tianjin University
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Underground circular tunnel Jammed area Tunnel lining Cylindrical SH waves Scattering Ground motion Dynamic stress concentration factor
CLC: U451.4
Type: Master's thesis
Year: 2007
Downloads: 21
Quote: 0
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Abstract


With the traffic and environmental issues becoming increasingly serious, large-scale development and utilization of underground space has become an important component of modern urban construction part . Because underground tunnel structure on cylindrical SH waves will affect the ground motions near the tunnel and underground tunnel caused by the dynamic stress concentration phenomenon in the construction of a new tunnel blasting cylindrical wave generated when the original tunnel may affect the structure of secure, so the impact of quantitative calculation is necessary . In this paper, a special kind of boundary integral equation method to study the half-space round jammed under the Mainland Area and tunnel lining for cylindrical wave scattering case , the total wave field within the media field and scattered field by the superposition of freedom derived from the virtual the distribution of the source surface scattering wave field line source constructed by the boundary conditions established equations solved to obtain the virtual wave source density , and thus obtain the total wave field . This article from the boundary conditions as well as to meet the analytical comparison with existing two aspects to the accuracy of the test results . Consider the incident wave frequency, the wave source and the jammed area or cavern distance from the center , the jammed area or cavern depth as well as materials and other factors on the jammed near the venue and the lining surface displacement circumferential hoop stress TUNNEL amplitude effects . The numerical results ultimately draw some useful conclusions , theoretical research in this field and engineering applications has important significance .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel structure theory > Theory of tunnel lining
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