三峡库区变动回水段码头新结构研究

Research on New Wharf Structure in Fluctuant Backwater Area of Three Gorges Reservoir

三峡工程建成蓄水至175 m以后,库区变动回水区港口码头建设面临的是长历时的大水深和年复出现的大水位差及大流速的水文环境,使类似于三峡水库成库前传统的架空直立式码头的施工方法不再适宜。以纳溪沟实际工程,提出了墩柱梁板式码头新结构,并分析了其力学性能。研究表明,该结构型式码头能够较好的适应三峡蓄水后出现的长历时大水深现象,一方面有利于提高施工水位,另一方面可以增大排架间距并能提高码头稳定性,从而实现码头全天候建设。其将可能作为库区变动回水段码头的一种新型结构具有较好的应用前景。

After the Three Gorges Project impounding to 175 meters,the terminals construction environment are long-lasting large water depth,large water level difference and large water flow.So the traditional suspended vertical wharf structure before the Three Gorges Reservoir impoundment is not suitable.Taking the Naxigou project for an actual example,a new structure of pier beam slab terminal was proposed and its mechanical properties were analyzed.The results show that the pier beam slab terminal can adapt to long-duration deep water after the Three Gorges impoundment.This terminal structural,on the one hand,help to improve the construction level;on the other hand,it can increase the bent spacing and improve the stability of terminal,in order to achieve all-weather construction of terminal.It can be widely used as a new terminal structure in fluctuating backwater area of Three Gorges Reservoir Area.