三峡升船机上游浮式导航堤长度优化研究

Optimization study on the length of upstream floating guide wall of TGP's shiplift

通航建筑物的导航建筑物长度的确定 ,除考虑设计船舶 (队 )的长度外 ,还应考虑风、浪、水流等因素的影响。三峡升船机上游引航道隔流堤布置方案改变后 (即将冲沙闸包在上游引航道内 )通航水流条件较原布置方案得以改善 ,从而进一步提出了优化升船机导航浮堤长度的必要性。为此通过有关模型试验论证 ,在满足安全导航和船舶 (队 )运行要求的前提下 ,三峡升船机上游浮式导航堤的长度 ,可由原 2 5 0m缩短至 12 0m ,从而改善了浮堤结构的受力条件 。

Determining the length of guide works should also take account of the effect of wind, wave, flow etc., in addition to the length of the design tows. After the layout of the separation levee for upstream approach channel is changed(i.e. the flushing sluices reformed from the temporary shiplock are located inside the upstream approach channel), the upstream flow conditions for ships accessing to or leaving the shiplift will be improved, so that there is necessity to optimize the length of the floating guide wall. From model tests and the requirements of meeting guidance for safe navigation and ship operation, the length of the floating guide wall upstream of the Three Gorges shiplift can be reduced from original 250 m to 120 m. Thereby, the stressing conditions for the floating guide wall can be markedly improved and the project cost of the floating guide wall can be greatly saved.