摘要
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.
一个简化方法对装载的吃惊在地下的岩石大洞 / 隧道为具体衬里的设计被建议。装载可以在地面表面或邻近大洞 / 隧道的爆炸的地面穿入射弹上源于炸药的爆炸。产生问题要求一致地在跨度上散布的一个短暂压力装载的一根横梁的动力学的答案。根据有岩石门栓和 shotcrete 的系统的机械特征，一个动态支持设计方法基于自由(SDOF ) 的相等的单个度被提出。SDOF 方法被用于获得最大的排水量在横梁中间跨度，它经常是在强风抵抗的设计的控制因素。在这个问题的明确的表达，建议方法联合 spalling 和结构的动力学理论的现象。一个例子被提供表明这个简化方法的适用性。
基金
Projects（50934006, 50904079） supported by the National Natural Science Foundation of China
Project（2010CB732004） supported by the National Basic Research Program of China
作者简介
ZHAO P J, PhD, Senior Engineer; Tel： ＋61 7-38523800; E-mail： pzhao@butlerpartners.com.au
