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Simplified design of rock cavern concrete lining to resist shock loading

Journal of Central South University 2010年第5期17卷 1087-1094页

作者： ZHAO P J LOK T S 殷志强周子龙 Butler Partners Pty Ltd Queensland 4006 Australia Protective Technology Research Centre School of Civil and Environmental Engineering Nanyang Technological University Singapore 639798 Singapore School of Resources and Safety Engineering Central South University Changsha 410083 China

A simplified method was proposed for the design of concrete lining in underground rock cavern/tunnel against shock loading. The loading may result from the detonation of explosives on ground surface or ground penetration projectiles exploding adjacent to the cavern/tunnel. The resulting problem necessitates the solution of the dynamics of a beam loaded by a transient pressure uniformly distributed over the span. According to mechanical characteristics of the system with rock bolt and shotcrete, a dynamic support design method based on equivalent single degree of freedom （SDOF） was put forward. The SDOF method was applied to obtaining the maximum displacement at the mid-span of the beam, which is often the controlling factor in the blast-resistant design. In the formulation of the problem, the proposed method combines the phenomena of spalling and structural dynamics theory. An example is provided to demonstrate the applicability of this simplified method.

关键词： tunnel lining design shock loading dynamic response rock cavern

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Seismic performance of tunnel lining of side-by-side and vertically stacked twin-tunnels

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Journal of Central South University 2011年第4期18卷 1226-1234页

作者：陳水龍魏敏樺 Department of Civil Engineering National Taipei University of Technology Department of Civil and Engineering Management National Quemoy University

The dynamic interaction between tunnel lining and its surrounding soil is a complicated issue as the magnitude of seismic wave from bedrock to the structure can be easily influenced by the geometrical layout and structural stiffness of the tunnel.A series of numerical analysis was conducted to study the dynamic response of the tunnel lining of side-by-side and vertically stacked double-tube tunnel since the inertia and kinematic interactions between the tunnel lining and the surrounding soil during an earthquake could induce excessive stresses to the lining itself due to the stiffness variation between the lining and the *** earthquake ground acceleration was used as an input motion in the dynamic *** interactive behavior of bending moment and axial forces,and the displacement of the tunnels were used to evaluate the effect of tunnel geometrical layout on the performance of the *** is found that the effect of earthquake on the axial thrust of the lining is insignificant,and there is a reduction of the bending moment in the lining due to the redistribution of the surrounding soil after the earthquake.

关键词： underground excavation tunnel lining design seismic response numerical analysis

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