三峡船闸145m水位下运行方式研究

Operational mode of TGP lock under waterlevel 145 m

当三峡库水位变化时 ,三峡工程船闸第二级闸室存在作为首级与中间级的两种运行工况。两种工况每次充水水体相当 ,但起始水头相差近 1倍 ,不能同时满足充水时间与停泊条件要求。为此 ,通过 1∶30物理模型 ,采用优化运行方式 ,即在 14 5m条件下 ,利用输水廊道进行补水 ,使第二闸室起始水位不低于 133m。结果表明 :补水后第二闸室充水时间不大于 12min ,船队缆绳拉力在允许值内 ,即 9× 10 0 0t船队的横向系缆力小于 30kN ,纵向系缆力小于 5 0kN。

When the Three Gorges reservoir water level changes, the second chamber of five stage lock of TGP will be required to operate as the first class and middle class chambers in every year.Under the above two operational conditions,the filling volumes of chamber are almost equal,but their difference of initial water heads is twice as much,so the size of the conveyance system cannot at the same time meet the requirements of both filling time and mooring forces. In order to satisfy the design requirements,an optimized operational mode was adopted through a model test research with a scale of 1∶30,which was to use the conveyance culvert to supplement water into the third chamber so as to keep the water level of the second chamber being not below than 133 m. The results show that the filling time is not over 12 min,and the mooring forces are less than allowable values.