三峡库区滑坡涌浪作用下高桩码头船舶系缆力试验研究

自2003年三峡工程开始蓄水后,库区两岸岩体由于长期受高水位的影响,滑坡的活动性显著增强。涌浪作为滑坡的主要次生灾害形式,对库区高桩码头的安全产生重大影响。本文以三峡库区万州江南沱口码头段为原型建立河道物理模型,研究水库滑坡涌浪对高桩码头船舶系缆力的作用。通过试验,得到了不同条件下的试验数据。经过分析,得出了涌浪作用下高桩码头船舶系缆力随涌浪传播、初始波高、水深、滑体倾角以及滑体方量的变化规律,提出了船舶系缆力的变化过程分为急剧衰减和缓慢衰减两个阶段。在此基础上,结合试验量测数据,确定了船舶系缆力的标准值。

Experimental study about ship mooring force of high-pile wharf under the action of the Three Gorges Reservoir landslide surge

The three gorges reservoir has started to use since 2003, the rock mass on both sides of the reservoir due to the effect of high-water level running over a long period of time, landslide activity significantly enhanced. Surge as the main secondary disasters of landslides,which has a major impact on the security and stability of high pile wharf of the reservoir area. Besides, ship mooring force is one of the main load of high pile wharf design, in order to better study the reservoir landslide surge to the effect of ship"s mooring force, we took Wanzhou changjiang delta Tuo mouth terminal segment as prototype, established the river physical model in map scale 1:70, and develaped landslide surge three-dimensional physical model experiment by adopting the experimental control system and measurement system. According to the experiments, we gained reliable experimental data of landslide suege. After careful analysis, it is concluded that piled wharf ship"s mooring force changes with the surge propagation, the initial wave height, water depth, dip Angle and the changing rule of the slip body volume under the action of the landslide surge, at the same time ,we put forward the change of the ship"s mooring force process is divided into rapid stage and slow decay stage. On this basis, based on "load code for the design of port engineering", combined with the experimental measurement data, we determined standard values of ship"s mooring force under the impact of landslide surge in piled wharf of the three gorges reservoir area.