南美地区大潮差条件下海港工程设计施工

针对部分海域海港工程建设中潮差较大的问题,设计采取改梁板为下层全预制结构、改护舷挡板为钢结构、试验取消剪力键的方法来减少水上作业时间,并用组合桩解决浪溅区的防腐难题;在施工方面,根据水上施工环境的窗口期分析和潮位预报,提出须乘潮靠港并及时松紧缆,推荐采用随潮差转动的跳板驳和浮码头,借潮起重安装钢栈桥,采用自升式平台避潮和根据潮差采用不同抛石工艺等方法解决大潮差下水上施工的难题,可为大潮差条件下的工程建设提供借鉴。

Design and construction of seaport engineering under large tidal range in South America

Aiming at the problem of large tidal range in the construction of seaports in some sea areas,we design to adopt precast structure at the lower layer of all the beams,change the concrete fender baffle to steel material,and cancel the shear key after specific test to shorten the time of waterwork.To deal with the anti-corrosion problem of steel piles around the spash zone,we use the composite piles. For the construction,according to the work period analysis and tide forecast,we propose that the barge shall berth at tide and the mooring cable,and be loosened and tightened from time to time. It is recommended to adopt the springboard barge and floating jetty,lift and install steel trestle by the tide,and deal with the difficulty of marine construction by adopting the jacking-up platform for piling and ripple method to reduce the adverse effects of large tidal range. The research result may serve as reference for the project construction under the condition of large tidal range.