Based on the mature design and construction scheme of open caisson, the open caisson is suited for construction of infrastructures in soft soil, and widely used in water and wastewater engineering.

• 摘要沉井设计理论和施工技术都较成熟，适于软土条件下地下建（构）筑物的施工，并在给水排水工程中得到了广泛应用。