1. The ship's lock is a special hydraulic structure. To put it simply, it is specially used for the passage of ships. It is not designed to have a flood evacuation function!
2. During flood flow, the flow rate is large, the flow speed is fast, and the erosion of the flow channel is large. Therefore, the drainage building concrete is impact resistant and. wear-resistant concrete and the flatness of the concrete surface should be very high. The water speed in the ship lock is slow, so the concrete standards and requirements of the ship lock during the construction process are incomparable with the anti-abrasion concrete on the ship lock. flow! On the surface, it appears that the ship's lock also connects upstream and downstream. As long as all doors are open, floodwaters can be drained away. However, it is estimated that the ship's lock will be washed away within the next hournt its opening. The power of water cannot be underestimated! Even special spillways need to be repaired every year.
3. Due to the large flow and rapid flow of flood flow, the water flow not only has large erosion on the flow channel, but also has large erosion downstream. Therefore, some energy dissipation. measures should be taken in flood drainage buildings to reduce the energy of small water flows and corresponding protective measures should be constructed downstream to reduce the impact of scour. Ship locks do not meet these conditions.
4. Most ship lock gates are opened and closed in still water, meaning that water flow can only be opened and closed under stationary conditions.
5. Under normal circumstances, water release structures equipped with hydroelectric power plantsques can release sufficiently large floods, and it is not necessary to use ship locks to release the floods.
The reasons are:
1. The early release of floodwaters from the reservoir will have a huge impact on downstream areas. Early flood discharge should alert downstream areas to prepare. avoid losses.
2. The highest water level was reserved during the construction of the reservoir. When you reach the highest water level, you must ask the superior for flood evacuation.