STUDY OF DISTRIBUTION LAW OF WATER PRESSURE ACTING ON COMPOSITE LINING AND REASONABLE PARAMETERS OF GROUTING CIRCLE FOR SUBSEA TUNNEL
STUDY OF DISTRIBUTION LAW OF WATER PRESSURE ACTING ON COMPOSITE LINING AND REASONABLE PARAMETERS OF GROUTING CIRCLE FOR SUBSEA TUNNEL
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发表时间：
2012
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通讯作者：
Zhang Chengping
中科院分区：
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作者：
Zhang Chengping
与陆地隧道不同，海底隧道位于海底深处，地下水处理是隧道施工的关键问题，同时，衬砌结构设计的核心问题是进水控制和作用在衬砌结构上的水荷载计算，采用挡水限排设计原则，在小流量时，衬砌外水压力将显著降低，因此，在小流量时，衬砌结构设计应考虑挡水限排的原则，并应考虑挡水限排的原则。以厦门翔安海底隧道为例，分析了初期支护参数变化对复合式衬砌结构水荷载和隧道涌水量的影响，并对复合式衬砌结构水荷载和涌水量的计算方法进行了分析，提出了复合式衬砌结构水荷载和涌水量的计算方法。采用理论分析和数值模拟的方法，阐述了二次支护和注浆循环对涌水量和外水压力的影响，提出了选择经济合理的注浆循环参数的程序和方法;给出了翔安海底隧道穿越风化深槽F4的合理注浆圈参数，研究成果可为高水压、高水头条件下隧道防排水系统设计提供参考。富集区，包括海底区域。
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.