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地基对加筋土挡墙影响的对比分析

徐鹏 蒋关鲁 王宁 韩宜均 王智猛 刘勇

徐鹏, 蒋关鲁, 王宁, 韩宜均, 王智猛, 刘勇. 地基对加筋土挡墙影响的对比分析[J]. 西南交通大学学报, 2020, 55(4): 752-757. doi: 10.3969/j.issn.0258-2724.20180765
引用本文: 徐鹏, 蒋关鲁, 王宁, 韩宜均, 王智猛, 刘勇. 地基对加筋土挡墙影响的对比分析[J]. 西南交通大学学报, 2020, 55(4): 752-757. doi: 10.3969/j.issn.0258-2724.20180765
XU Peng, JIANG Guanlu, WANG Ning, HAN Yijun, WANG Zhimeng, LIU Yong. Comparative Analysis of Influence of Foundation on Reinforced Soil Retaining Walls[J]. Journal of Southwest Jiaotong University, 2020, 55(4): 752-757. doi: 10.3969/j.issn.0258-2724.20180765
Citation: XU Peng, JIANG Guanlu, WANG Ning, HAN Yijun, WANG Zhimeng, LIU Yong. Comparative Analysis of Influence of Foundation on Reinforced Soil Retaining Walls[J]. Journal of Southwest Jiaotong University, 2020, 55(4): 752-757. doi: 10.3969/j.issn.0258-2724.20180765

地基对加筋土挡墙影响的对比分析

doi: 10.3969/j.issn.0258-2724.20180765
基金项目: 中国铁路总公司科技开发计划项目(2014G003-C),四川省科技计划项目(2018GZ0057)
详细信息
    作者简介:

    徐鹏(1988—),男,博士研究生,研究方向为道路与铁道工程,E-mail:sdxplt@163.com

    通讯作者:

    蒋关鲁(1962—),男,教授,研究方向为道路与铁道工程,E-mail:wgljiang@swjtu.edu.cn

  • 中图分类号: V221.3

Comparative Analysis of Influence of Foundation on Reinforced Soil Retaining Walls

  • 摘要: 为了分析地基对加筋土挡墙的影响,开展了两组离心模型试验. 首先根据相似理论确定试验相似比尺,其次根据相似比尺选取试验材料并制作模型进而开展砂土与黏土地基工况时的模型试验,最后采集并分析了填筑期与施工期的墙体位移、水平土压力、基底竖向应力与筋材应变. 结果表明:砂土地基时墙体的位移最大值位于结构的上部;黏土地基填筑阶段时墙体的位移约为砂土地基时的3倍并且加载阶段时墙底的位移可达30 cm;水平土压力系数沿着高度方向非线性分布,同时加载期的数值小于填筑期时的值;黏土地基时的墙背水平土压力系数小于砂土地基时的数值;与砂土地基时相比,黏土地基的变形可以减小面板底部竖向应力集中的趋势,使其竖向应力与自重应力比值接近1.0;与砂土地基时筋材拉力相比,由于黏土地基时墙体位移较大,因此此时底部筋材应力可增大3倍,同时筋材应变最大值出现的位置相对更远离墙面.

     

  • 图 1  模型断面(单位:cm)

    Figure 1.  Model section (unit: cm)

    图 2  墙体水平位移

    Figure 2.  Horizontal displacement

    图 3  模型地基面变形曲线

    Figure 3.  Deformation curve of the ground surface

    图 4  水平土压力系数比

    Figure 4.  Ratio of the horizontal earth pressure coefficient

    图 5  竖向土压力

    Figure 5.  Vertical earth pressure

    图 6  连接件拉力

    Figure 6.  Stress of the anchor connector

    图 7  筋材应变

    Figure 7.  Strain of the reinforcements

    表  1  物理量相似关系

    Table  1.   Similarity relationship

    物理量量纲相似比物理量量纲相似比
    长度L1/n位移L1/n
    密度ML−31应力ML−1T−21
    应变1摩擦角1
    黏聚力ML−1T−21MLT−21/n2
    抗拉强度MT−21/n抗弯刚度ML3 T−21/n4
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-09-13
  • 修回日期:  2018-10-27
  • 网络出版日期:  2019-01-10
  • 刊出日期:  2020-08-01

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