深水区大体积水下障碍物打捞技术研究

Research on Salvage Technology of Large Volume Underwater Obstacles in Deep Water

拉各斯轻轨跨海桥施工时,遇到沉船、钢筋砼系船墩、钢管桩等水下大体积障碍物,无法搭设钢栈桥及钢平台。为解决跨海桥施工难题,针对深水区障碍物种类多、体积大、水流速度快等复杂的水下条件,项目部因地制宜地制定了科学的打捞方法。通过采用气举反循环清淤、绳锯切割、水下氧弧切割、水上打捞、千斤顶拔桩等工艺相结合,顺利完成障碍物的打捞作业,为跨海桥的顺利贯通扫清障碍物。通过对复杂海况下深水区障碍物打捞技术的研究,对类似的工程具有较大的参考意义。

During the construction of Lagos light rail sea-crossing bridge,large underwater obstacles such as sunken ship,reinforced concrete bollard pier and steel pipe pile are encountered,so it is impossible to set up steel trestle and steel platform.In order to solve the construction problems of sea-crossing bridge,aiming at the complex underwater conditions such as many kinds of obstacles,large volume and fast water flow speed in deep water,the project department has formulated scientific fishing methods according to local conditions.Through the combination of air lift reverse circulation desilting,rope saw cutting,underwater oxygen arc cutting,water fishing,jack pile pulling and other processes,the fishing operation of obstacles is successfully completed and the obstacles are cleared for the smooth connection of the sea-crossing bridge.The research on obstacle salvage technology in deep water under complex sea conditions has great reference significance for similar projects.