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大藤峡水利枢纽船闸上、下游最大水头差为３７．６０ｍ，每次最大输水量１７．５万ｍ３．最大流量５４５ｍ３／ｓ，如此规模的单级船闸国内属最大，国际上也罕见。船闸采用底部纵支廊道立交分流二区段出水盖板消能输水系统，可获得更好的水力指标，是一种新的有发展前景的分流型式．试验表明：在设计水头下５分钟启门，充、泄水时间为１０、１１．４分钟，相应最大流量为５４５．２、４６９．５ｍ３／ｓ．在各种情况下闸室及引航道停泊条件良好；减压模型试验证明了利用突扩体门楣和门后低压区通气来解决阀门段的空化问题是先进的、行之有效的。
The maximum water head difference between the upper and lower reaches of the Big Tengxia Water Control Project is 37.60m, with a maximum of 175,000m3 each time. The maximum flow of 545m3 / s, such a single-stage large-scale ship lock is the largest, internationally rare. It is a new type of diversion with promising prospects that the ship lock can adopt the energy-saving water-conveying system of the two sides of the longitudinal tributary corridor interchange tributary two-stage outlet cover to obtain better hydraulic indexes. Experiments show that: in the design head 5 minutes Kai door, charge, discharge time is 10,11.4 minutes, the corresponding maximum flow of 545.2,469.5m3 / s. Under various conditions, the parking conditions of the lock chamber and the approach channel are good. The decompression model test proves that it is advanced and effective to solve the problem of cavitation in the valve section by using the expansion lintel and the low-pressure zone after the door.