Abstract—Stiffened Deep Cement Mixing (SDCM) piles possess superior bearing capacity compared with conventional pile foundations and thus are often employed as the foundation of transportation engineering in coastal soft-soil. This study aims to clarify and gain an insight into the vertical settlement of SDCM piles under vertical cyclic loads by developing a finite element analysis. Specifically, the reducing effects of Deep Cement Mixing (DCM) pile reinforcement on PHC pipe pile settlement under vertical cyclic loads are discussed through several parametric study. The results reveal that the effective reinforcement depth of the DCM pile is about 2/3 of the length of the PHC pipe pile. The cumulative settlement at the pile top is reduced by about 2% for every 1 m increase in the reinforcement depth of the DCM pile. The cumulative settlement at the pile top decreases by about 15% for every 10 cm increase in the radius of the DCM pile. 

Keywords—DCM pile, PHC pipe pile, vertical cyclic load, cumulative settlement, reducing effect

Cite: Hongbo Liu, Guoliang Dai, and Xinsheng Chen, "Reducing Effects of Deep Cement Mixing Pile Reinforcement on the Pipe Pile Settlement under Vertical Cyclic Load: A Finite Element Analysis," International Journal of Structural and Civil Engineering Research, Vol. 14, No. 1, pp. 16-22, 2025.