枢纽扩建船闸工程上游设计最低通航水位的确定

Determination of the lowest navigable water level in upper reaches for ship lock expansion project

上游设计最低通航水位是船闸工程建设的关键技术参数之一,直接影响船闸使用性能、投资和工期。针对已建枢纽扩建船闸工程上游设计最低通航水位取值的问题,根据株洲枢纽实测水位,进行枢纽实际最低运行水位和保证率水位的分析,对不同特征水位时二线船闸工程投资情况、一线船闸运行情况及渠化梯级间水位衔接情况进行论述,采用模型试验验证和测算投资比较的方法,得出株洲二线船闸上游设计最低通航水位宜采用38. 3 m的结论。该研究方法对山区、丘陵区枢纽扩建船闸工程具有借鉴意义。

The lowest navigable water level in the upstream design is one of the key technical parameters for ship lock construction,which directly affects the performance,investment and duration of the lock.In the light of the value of the lowest navigable water level in the upper reaches of the built ship expansion project,we analyze the actual minimum operating water level and the guaranteed level water level according to the measured water level of the Zhuzhou junction,and discuss the investment situation of the second-line lock project,the operation situation of the first-line lock and the connection of the water level between the channelized cascades under different characteristic water levels.The conclusion is drawn that the lowest navigable water level of the upper design of Zhuzhou second-line lock should be 38.3 m by means of model test verification and investment comparison.The research method can be used as reference for the lock expansion project in the mountainous and hilly areas.