超大跨度地下扁平洞库复合支护结构抗爆性能研究

At present, underground engineering has been widely used in various fields of the national economy and national defense construction. Thus a series of urgent technical problems are brought in excavation engineering protection etc. Propagation of shock wave in jointed rock mass and anchored rock mass, the anti explosion performance and failure mechanism of super large span underground cavern with flat composite supporting structure are analyzed intensively. Theoretical analysis, experimental research and numerical simulation are all used in this research. The reasonable and feasible shock wave equation in jointed rock mass will be presented to find out the law of shock wave propagation. The dynamic governing equations will be established and solved under the action of explosive dynamic loads. The response law and failure mechanism of composite supporting structure under explosive loading will be revealed, and the dynamic response of the structure will be improved and optimized. The structure similarity model test will be studyed and suitable test platform for the composite supporting structure under explosion will be developed. Numerical analysis method will be improved to explore more suitable numerical analysis techniques , and theoretical and experimental results will be verified by new methods. The research results can provide some theoretical guidance and technical support for the design and calculation of super large span underground cavern with flat composite structure.

目前，地下洞库工程已经越来越多的应用在国民经济和国防工程建设的各个领域。由此在洞库工程防护等方面带来了一系列亟待解决的关键技术难题。本课题拟采用理论分析、试验研究与数值模拟相结合的方法，针对超大跨度地下扁平洞库复合支护结构，在节理/裂隙岩体和锚固岩体中冲击波的传播、结构抗爆性能和破坏机理等方面展开深入研究。提出合理可行的节理/裂隙岩体中冲击波波动方程，探明冲击波传播规律；在爆炸动荷载作用下，建立并求解结构动力控制方程，揭示爆炸荷载作用下复合支护结构的响应规律和破坏机理，改进和优化结构动力响应计算方法并进行试验和模拟验证；研究结构相似比模型试验技术，开发合理适用的复合支护结构抗爆试验平台；改进数值分析方法，探索更加适用的数值分析技术，验证理论及试验结果。本课题研究成果可为超大跨度地下扁平洞库复合支护结构设计计算提供一定的理论指导和技术支持。

地下洞库工程已经越来越多的应用在国民经济和国防工程建设的各个领域。由此在洞库工程防护等方面带来了一系列亟待解决的关键技术难题。本课题采用理论分析、试验研究与数值模拟相结合的方法，针对超大跨度地下扁平洞库复合支护结构，在节理/裂隙岩体和锚固岩体中冲击波的传播、结构抗爆性能和破坏机理等方面展开深入研究。提出合理可行的节理/裂隙岩体中冲击波波动方程，探明冲击波传播规律；在爆炸动荷载作用下，建立并求解结构动力控制方程，揭示爆炸荷载作用下复合支护结构的响应规律和破坏机理，改进和优化结构动力响应计算方法并进行试验和模拟验证；研究结构相似比模型试验技术，改进数值分析方法，探索更加适用的数值分析技术，验证理论及试验结果。本课题研究成果可为超大跨度地下扁平洞库复合支护结构设计计算提供一定的理论指导和技术支持。