海底隧道复合衬砌水压力分布规律及合理注浆加固圈参数研究

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Abstract Different from land tunnels，the subsea tunnels are located deeply under the sea，so the groundwater treatment is the key issue during tunnel construction. Simultaneously，water inflow control and calculation of water load acting on lining structure are the core issues. The external water pressure on lining will be reduced remarkably with low discharge by adopting the design discipline of blocking groundwater and limiting discharge. So the design of lining structure in subsea tunnels is more economical. Based on the correlation theory of groundwater hydraulics，a calculation methods of water load acting on composite lining and water inflow in subsea tunnels is derived. Taking Xiang′an subsea tunnel in Xiamen for example，the influences of variable parameters of primary support，secondary support and grouting circle on water inflow and external water pressure are then expounded by using theoretical analysis and numerical simulation. Subsequently，the program and method for choosing economic and rational parameters of grouting circle are put forward；and the reasonable parameters of grouting circle for Xiang′an subsea tunnel through the weathered deep slot F4 are given，which gets satisfying effects. The results provide references for tunnel waterproofing and drainage system design in high water pressure and water-enriched regions including subsea regions.

Key words： tunnelling engineering subsea tunnel composite lining water pressure；grouting circle water inflow

Received: 22 August 2011

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/I2/280

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