Through model tests, it was found that under the action of strong tidal surges that occur once every 50 years or once every 100 years, the water level in the foundation pit at the entrance changes significantly, and the water level rises rapidly, which has a significant impact on the safe construction of the foundation pit, but has a relatively small impact on the water level of the ship lock foundation pit; The continuous rainstorm has greater impact on the foundation pit water level during the rainfall condition, and the water level rises rapidly, but the foundation pit pumping can still be adjusted during the rainfall. However, in the case of continuous heavy rainstorm, the foundation pit water level rises rapidly, and corresponding measures need to be taken in advance; Under the combined action of strong tidal bore and rainfall, the water level in the foundation pit significantly increases and rises rapidly.
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