Elastic foundation beams have the advantages of high construction speed,high economic benefits and large structural rigidity,thus they are the preferred proposal for ARMG foundation of automated container yards.Based on an overseas automated container yard project upon sandy subgrade,this paper uses finite element software to build ARMG foundation models with different segment lengths,and analyzes the sensitivity of elastic foundation beams to segment length,differential settlement of subgrade,and temperature.The results show that the bending moment and joint shear force of the elastic foundation beam under ARMG wheel pressure increase with the increase of the segment length.After the segment length exceeds 10 m,the bending moment and joint shear force of beam tend to stabilize.When differential settlement of subgrade occurs,the larger the segment length is,the stronger the adaptability of the ARMG foundation to differential settlement is.After the segment length exceeds 10 m,the bending moment and joint shear force of beam tend to stabilize.The temperature has a small effect on the internal force of beam.The bending moment caused by temperature increases with the increase of the segment length.When the segment length is larger than 25 m,the bending moment caused by temperature tends to stabilize.