During construction of the cellular sheet pile in clay,great difficulty is occasionally met because of the interlocking forces between the sheet piles surges when cellular sheet piles penetrate into specific geological layer such as the hard clay. This paper presents a new method to evaluate the impact of alluvium clay on cellular sheet pile construction based on HKBCF project. A new parameter based on CPT tests is applied to determine the difficulty of penetrating process of sheet piles. The results may serve as reference for similar engineering construction.