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中文摘要：
海底隧道施工过程中最大的风险是隧道突水，一旦发生突水事故，将对整个隧道工程带来灾难性的后果．针对这一工程问题，应用极限平衡理论分析海底隧道突水的力学机理，得出海底隧道可能发生突水的临界水压计算公式．分析影响临界水压的因素，认为岩体物理力学参数、隧道上覆岩层厚度、隧道开挖半径及支护形式与强度是影响临界水压的主要因素，提出预防海底隧道突水的措施．
英文摘要：
Having the infinite seawater above the subsea tunnel, the water inrush is the maximal risk on subsea tunnel construction. In case of water inrush occurring, the whole tunnel project will be de-stroyed catastrophically. For this engineering problem, the water inrush mechanics of subsea tunnel is analyzed by using the limit equilibrium theory. And the equation of critical water pressure is obtained when the water inrush occurs possibly. Analyzing the factors affecting the critical water pressure, it is found that the physical mechanical parameters of rock, the covering rock depth of tunnel, the radius of tunnel, support pattern and support strength are the main factors. And the measures which prevent the water inrush of subsea tunnel are proposed.
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