码头的基槽开挖是一项质量有特殊要求的疏浚工程。近年来,在华南筑港工程中的开挖的码头基槽,深度达到-14米～-18米,最深近-20米,开挖的泥层厚度达9米～15米,而且土质复杂,有淤泥,淤泥混砂,粗、中、细砂,亚粘土,粘土以及页岩粉砂岩互层等多种土质,因此开挖难度较大,必须使用多种类型的挖泥船分段分层进 Base trench excavation is a quality of the special requirements of the dredging project. In recent years, the pier foundation in the excavation of South China Port Engineering has a depth of -14 meters to -18 meters and a depth of nearly -20 meters. The thickness of the excavation muddy layer is 9 meters to 15 meters, and the soil quality is complicated. There are many kinds of soil such as silt, silt sand, coarse, medium and fine sand, loam, clay and shale silt interbedded, so it is difficult to excavate and must be divided into layers by various types of dredgers Enter