充泥管袋-膜袋混凝土结合钢板桩组合围堰施工及数值模拟分析

Construction and Numerical Simulation Analysis of a Combination of Geotextile Bag-membrane Bag Concrete with Steel Sheet-pile Cofferdam

跨江海隧道工程不可避免要面对水文、潮汐、地质等工程重难点,而适当的施工工法是跨江海隧道工程安全施工的保证。以海口文明东越江通道工程为背景,针对该工程工期紧张、极端天气频发以及活水流动性大等施工难点,提出了新型充泥管袋-膜袋混凝土结合钢板桩组合围堰的施工工法,并将该工法总结为4个步序,通过数值模拟结果验证了该围堰具有良好的隔断渗流作用。该施工工法能为跨江海隧道工程安全施工起到借鉴作用。

It is inevitable for the river or sea-crossing tunnel project to face hydrology, tide, geology and other engineering difficulties. The appropriate construction method can ensure safe construction of the tunnel project. Wenming east road dong tunnel in Haikou the is taken as an example. In order to solve the construction difficulties of tight construction period, frequently occurring of extreme weather and high fluidity of running water, a new construction method combining geotextile bag-membrane bag concrete with steel sheet pile is put forward. The method is summarized into four stages. The cofferdam is verified to have a good effect of blocking seepage flow by numerical analysis. The new method can provide reference for the safe construction of crossing river or sea tunnel projects.