摘要
路堤式加筋土挡墙受挡墙上部填土影响其水平变形特性较为复杂,目前相关研究报道较少。本文基于实际工程案例,建立加筋土挡墙有限元模型,通过改变结构设计参数的单一因素,分析筋材竖向间距、平台宽度、筋材长度对路堤式加筋土挡墙水平变形特性的影响。研究结果表明,筋材竖向间距和平台宽度对挡墙整体水平位移影响较为显著;筋材长度增加可有效减小挡墙上部水平位移,在填土荷载作用下墙面水平位移沿墙高呈“S”形曲线分布。研究结果可增进相关技术人员对加筋土挡墙水平变形机制的认识,为优化加筋土结构设计提供一定参考依据。
The deformation characteristics of embankment-type reinforced soil retaining walls are relatively complicated due to the influence of the filling on the upper part of the retaining walls, and there are few studies on them at present. Based on the actual engineering case, the finite element model of the reinforced soil retaining wall was established. By changing the single factor of the structural design parameters, the impacts of the reinforcement vertical spacing, platform width, and length of the reinforcement on the horizontal deformation characteristics of the embankment-type reinforced soil retaining wall are analyzed. The research results show that the reinforcement vertical spacing and platform width have significant effects on the overall horizontal displacement of the retaining wall, and the increase in the length of the reinforcement can effectively reduce the horizontal displacement of the upper part of the retaining wall. At the same time, it is revealed that the horizontal displacement of the wall is distributed in an “S”-shaped curve along the wall height under the action of the filling load. The research results can improve the understanding of relevant technical personnel on the horizontal deformation mechanism of reinforced soil retaining wall and provide some reference for optimizing the design of reinforced soil structures.
作者
陈大鸿
CHEN Dahong(China Railway Construction Group Co.Ltd.,Beijing 100010,China)
出处
《铁道建筑技术》
2022年第12期207-211,共5页
Railway Construction Technology
关键词
加筋土挡墙
水平变形
数值分析
竖向间距
平台宽度
筋材长度
reinforced soil retaining wall
horizontal deformation
numerical simulation
vertical spacing
platform width
length of the reinforcement
