摘要
为了研究加筋土挡墙在路基面荷载作用下的受力和变形特征,通过拉拔与原位荷载试验,进行了加筋土墙体水平土压力、墙面水平变形及拉筋应力等分布规律的研究。结果表明:筋材应力沿其长度方向呈单峰值分布,峰值距墙面1.5 m处;加载初期墙面水平位移沿墙高呈反"S"形曲线分布,极值位于墙顶和中下部;路基面荷载作用主要影响挡墙上部土压力分布,相应的侧向附加土压力近似呈倒三角分布;由于加筋土的扩散、卸载成拱效应的影响,使得竖向附加土压力向下衰减比传统挡土墙更快。
In order to study the stress and deformation characteristics of the reinforced soil retaining wall under the subgrade surface load,horizontal soil pressure,metope horizontal deformation and tensile reinforcement stress distribution laws of the reinforced soil retaining wall were researched by in-situ pull-out test and load test. The results show that reinforcement material stress presents as single peak distribution along the length direction,from metope 1. 5 m,the horizontal displacement of wall panel along the wall presents as the anti-S shape in the initial stage,the extreme value is located in the top and lower part of wall. Subgrade surface load mainly influence the upper earth pressure distribution of retaining wall, and the corresponding lateral additional earth pressure arranged in inverse triangle distribution approximately. The spread and unloading arch of reinforced soil made vertical additional earth pressure attenuate faster than that of traditional retaining wall.
出处
《路基工程》
2016年第1期67-70,共4页
Subgrade Engineering
基金
教育部新世纪人才计划项目(NCET-12-0941)
中央高校基本科研业务费专项资金资助项目(2682014BR048)
关键词
加筋土挡墙
路基面荷载
拉拔试验
原位荷载试验
受力和变形特征
reinforced soil retaining wall
subgrade surface load
pull-out test
in-situ load test
stress and deformation characteristics
