通过有限元计算分析,研究了新老路面拼接台阶尺寸对拼接结构受力的影响,并提出了适宜的台阶宽度,包括面层台阶的尺寸和基层台阶的尺寸,为实际工程提供指导及借鉴。通过计算分析2种路面结构下,不同面层或基层台阶尺寸时新老路面结构的顶面变形、最大剪应力及层底剪应力,表明设置台阶有效降低了拼接路面结构中的剪应力及新老路面拼接面两侧的不协调变形。在台阶尺寸方面,面层拼接台阶的宽度大于20 cm即可,基层台阶宽度宜为40cm至60 cm。 Through the finite element analysis, the effect of the new-old pavement splicing step size on the stress of the spliced ​​structure is studied, and the suitable step width is proposed, including the size of the surface step and the size of the base step, which will provide guidance and reference for practical engineering. By calculating and analyzing the top deformation, the maximum shear stress and the shear stress at the bottom of new and old pavement structures under different pavement or basement steps under two kinds of pavement structures, it is shown that setting the steps effectively reduces the shear stress in the pavement structure and new Unparalleled deformation on both sides of the old pavement surface. In terms of the step size, the width of the surface splicing step should be larger than 20 cm, and the width of the base step should be 40-60 cm.