Long-span river or sea crossing bridge projects are commonly subjected to significant and complex long-term cyclic loads driven by factors such as wind and waves. The lattice-shaped diaphragm wall (LSDW) foundation, a novel and promising solution for long-span bridges, offers advantages in construction safety, adaptability, costeffectiveness, and stiffness. However, research in this area remains limited, impeding the further application of LSDWs. This study comprehensively investigates the bearing behavior of LSDWs under horizontal cyclic loads in soft soils. It introduces a detailed methodology utilizing a dual-layer wall setup and mathematical calculations to measure key parameters such as wall bending moments, displacements, and soil pressures. The research explores LSDW behavior throughout cyclic loading cycles, revealing trends in soil compression, densification, and displacement growth rates. Analysis of cumulative displacement and rotation patterns underscores the influence of load amplitudes and wall stiffness. The findings highlight the significant impact of cyclic loading cycles on cumulative displacement, with curve fitting revealing a logarithmic function with a strong correlation. Additionally, the study delves into the reduction in lateral soil resistance with increasing cyclic loads, proposing cyclic weakening factors for predicting soil pressure distribution and cyclic p-y curves. This study offers valuable insights into the comprehensive analysis and prediction of the performance of LSDW subjected to horizontal cyclic loading, with potential implications for long-span bridge construction projects.

来源平台：OCEAN ENGINEERING