通过二维数值模拟对桩承式路堤平面土拱应力折减系数进行了分析，探讨了影响折减系数的因素及其变化规律，结果表明：抗剪强度高的土体，应力折减系数较小，土拱效应作用显著，在一定范围中填土高度的增加，使得土拱效应逐渐形成，应力折减系数逐渐减小，土拱效应逐渐增强；桩净间距的增大或桩径的减小，都会使得应力折减系数增大，削弱了土拱效应的发挥程度。%This paper analyzed the pile supported embankment plane soil arch stress reduction coefficient using two-dimensional numerical simu-lation, discussed the factors and variation law influence of reduction coefficient, the results showed that: the soil with high shear strength, the stress reduction coefficient was small, the soil arching effect outstanding, increased the soli fill height in a certain range, made the soil arching effect gradually formed, the stress reduction coefficient decreased, the soil arching effect gradually increased;the increase of pile diameter spac-ing or reduce of pile diameter, will increase the stress reduction coefficient, reduced the degree of soil arching effect.
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