深埋非对称小间距隧道围岩压力计算方法  

Calculation Method of Loosening Pressure for Deep-buried and Non-symmetry Closely-spaced Tunnels

作　　者：李鹏飞[1,2] 王帆[1,2] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京城市交通协同创新中心,北京100124

出　　处：《北京工业大学学报》2017年第4期612-620,共9页Journal of Beijing University of Technology

基　　金：北京市自然科学基金资助项目(3144026);北京市博士后工作经费资助项目(Q6004014201501)

摘　　要：基于深埋单洞隧道的普氏平衡拱理论,综合考虑左、右洞结构不对称和不同时施工的条件,提出了深埋非对称小间距隧道围岩压力分析模型,并推导了计算公式;运用推导的公式讨论了中夹岩柱厚度、隧道开挖跨度与高度、中夹岩柱抗压强度及加固系数对隧道围岩压力的影响规律;最后,结合工程实例将现场监测结果与计算结果进行对比分析,验证了分析模型和推导公式的合理性.Based on the Pu,s sliding failure model of rock mass around a deep single tunnel,an analytical model of rock pressure for deep-buried and non-symmetry closely-spaced tunnels was proposed by considering asymmetrical structure and the construction processes. Meanwhile, based on the deduced formula,the causes that affect the rock pressure such as buried depth,rock pillars thickness,excavation span and excavation height were discussed. Finally, the comparison analysis was m a d e between monitoring data from practical tunnel engineering and theoretical values from the model. T he results show that the calculated model and the theoretical method proposed are rational and practicable. The experience and conclusions can be referred to the analysis of the design of supporting structure and reasonable construction scheme of deep-buried and non-symmetry closely-spaced tunnel.

关 键 词：小间距隧道 深埋非对称 围岩压力 

分 类 号：U451[建筑科学—桥梁与隧道工程]