无缝桥梁具有造价低、施工速度快、抗震性能好等优点,被广泛应用于中小桥梁。随着桥梁跨度的不断增大,超长无缝桥梁的概念开始被提出。超长无缝桥梁中整体式桥台的受力非常复杂,本文利用ABAQUS模拟建立了整体式桥台与台周土体相互作用的三维模型,分析了在单层砂类土中,在大水平位移作用下,桩长、桩径因素对台式整体式桥台中各截面内力的影响,研究了单层砂土中台式整体式桥台的受力性能。 Seamless bridge with low cost, construction speed, good seismic performance, etc., are widely used in small and medium bridges. As the span of the bridge continues to increase, the concept of a long, seamless bridge begins to be proposed. The force of the monolithic bridge abutment in the ultra-long seamless bridge is very complex. In this paper, a three-dimensional model of the interaction between the monolithic abutment and the soil around the platform is established by ABAQUS simulation. The effect of pile length and pile diameter on the internal forces of each section in the monolithic abutment under the action of displacement, the mechanical behavior of the monolithic abutment in single-layer sand was studied.