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针对暗挖海底隧道开挖面围岩稳定性问题,总结极限分析上限法、楔形体模型、二维对数螺旋线模型以及条分法模型4种理论解析模型,并考虑了海底隧道开挖面滑移体上部地层压力等因素,对理论解析公式进行了修正;同时结合一工程实例,将数值模拟方法与解析模型进行了对比分析。结果表明:与数值模拟结果相比,4种理论解析模型在求解极限支护力时都偏于安全和保守,其中,极限分析上限法精确度最高,其次是楔形体模型,再次是二维对数螺旋线模型和条分法模型。
Aiming at the stability of the surrounding rock of the excavation face of the submarine tunnel, four theoretical analytical models of the upper limit analysis method, the wedge model, the two-dimensional logarithmic spiral model and the striping model are summarized, and the excavation face The upper strata pressure and other factors, the theoretical analytical formula was amended; combined with a project example, the numerical simulation method and analytical model were compared. The results show that compared with the numerical simulation results, the four theoretical analytical models are biased to be safe and conservative in solving the ultimate support force. Among them, the upper limit analysis method has the highest accuracy, followed by the wedge model, and again the two-dimensional Number spiral model and the bar model.