深地下坑道衬砌结构抗局部冲击计算方法研究  

RESEARCH ON CALCULATION METHOD FOR LOCAL IMPACT OF DEEP TUNNEL LINING STRUCTURE

作　　者：冯淑芳[1] 王明洋[1] 任广昊[1] 李杰[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《岩石力学与工程学报》2011年第6期1149-1156,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2010CB732003);国家自然科学杰出青年基金项目(50878403);国家自然科学创新群体科学基金(51021001)

摘　　要：针对深部地下围岩衬砌结构的计算,假设激活的岩块为刚体,衬砌为钢筋混凝土结构,采用刚塑性不可压缩介质模型,用极限分析理论的上限方法,通过建立动力学许可速度场得到钢筋混凝土衬砌结构对岩块冲击的阻力分量。考虑纵向钢筋对震塌和贯穿的影响,根据阻抗曲线的特征,得到具有物理基础的钢筋混凝土结构的临界震塌与贯穿厚度近似计算公式。通过与经验公式的对比,验证该方法的可靠性和实用性。According to the calculation for the lining structures of deep tunnel,the hypotheses that the activated rock caused by the blasting wave is rigid body and the lining is built with reinforced concrete are put forward.By using the incompressible rigid-plastic model and the upper limit analysis theory,the impact force component of the lining on the rock blocks can be obtained by establishing the kinematical admissible velocity field.Considering the effects of longitudinal reinforcements on spalling and penetration,the approximate calculation formulae for critical thickness of spalling and penetration of reinforced concrete structure featuring with physical basis are obtained based on the characteristics of resistance curves.The reliability and practicality of the method are verified by comparing with the empirical formulae.

关 键 词：岩石力学 激活岩块 刚塑性模型 钢筋混凝土结构 冲击 

分 类 号：TU45[建筑科学—岩土工程]