sinking open caisson by undrained dredging

例句：

1. 1. The engineer used a special tool to sink the opening in the steel box and then unload it usingundrained dredging.
   工程师使用一种特殊工具将开口处沉入钢箱，然后使用不排水疏浚将其卸载。
2. 2. During the construction, they had to deal with the challenge of sinking an open caisson without disturbing the surrounding environment.
   在施工过程中，他们不得不处理下沉开口钢箱而不干扰周围环境的挑战。
3. 3. The undrained dredging method was crucial for ensuring the stability of the newly constructed foundation.
   不排水疏浚方法对于确保新建造基础的稳定性至关重要。