Abstract: This paper presents a case study of a secant pile slurry wall construction for the deep excavation of Shekou Cruise Center in Shenzhen. In the thick stone fills in near shore soft cohesive layers, the slurry walls are usually installed by using high or regular pressure jet grouts and secant piles. Compared with different wall types, it is concluded that the combination of castinplace lean concrete pile with the reinforced concrete piles could meet the design requirements. This paper presents the unique construction procedure in the subsurface conditions of thick stone fills and the brackish groundwater. The results indicate that the second pile is a reliable and efficient slurry wall type.

Key words: stone fills, slurry wall, secant piles