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渗流作用下海底隧道开挖面围岩稳定性分析

, PP. 130-136

Keywords: 隧道工程,海底隧道,解析模型,开挖面,围岩稳定性

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Abstract:

?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。

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