顶部条形荷载作用下加筋土挡墙水平变形分析

Horizontal Deformation Analysis of Reinforced Soil Retaining Wall under Top Strip Load

基于有限元数值方法,综合研究了顶部条形荷载宽度、偏移距离、荷载大小、筋材长度和填土性质等对挡墙水平变形的影响,研究结果表明:增加基础偏移距离,导致墙面水平变形逐渐减小,而最大变形出现位置逐渐降低;当增加基础宽度或荷载等级,可显著增加加筋土挡墙水平变形前者使最大水平变形出现的位置逐步下移,后者使最大水平变形出现位置逐步上移,最终趋于稳定;增加填土抗剪强度,可显著提高挡墙抗变形能力,从而显著减少加筋土挡墙面板水平变形;增加筋材长度可有效减小墙面水平变形,当筋材长度增至0.7倍墙高后,继续增加筋材长度对墙面板水平变形的控制作用减弱。

Based on the finite element numerical method,the influences of top strip load width,offset distance,magnitude of load,reinforcement length and filling property on the horizontal deformation of retaining wall were comprehensively studied.The results showed that the horizontal deformation of the wall decreased gradually with the increase of the offset distance of the foundation,and the position of the maximum deformation was lowered gradually.When the foundation width or load level was increased,the horizontal deformation of the reinforced soil retaining wall could be significantly increased,and the former made the position of the maximum horizontal deformation gradually move down,while the latter made the position of the maximum horizontal deformation gradually move up and eventually stabilize.Increasing the shear strength of the fill could significantly improve the deformation resistance of the retaining wall,thereby significantly reduce the horizontal deformation of the reinforced soil retaining wall panel;increasing the length of the reinforcement could effectively reduce the horizontal deformation of the wall,when the length of the reinforcement increased to O.7 times the wall height,the control effect of increasing the length of the reinforcement on the horizontal deformation of the wall panel was weakened.