›› 2017, Vol. 38 ›› Issue (8): 2182-2188.doi: 10.16285/j.rsm.2017.08.004

• 基础理论与实验研究 • 上一篇    下一篇

基于曲线滑裂面的挡墙主动土压力分析

杨 贵1, 2,王阳阳1, 2,刘彦辰1, 2   

  1. 1. 河海大学 岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098;2. 河海大学 安全与防灾工程研究所,江苏 南京 210098
  • 收稿日期:2015-09-21 出版日期:2017-08-11 发布日期:2018-06-05
  • 通讯作者: 刘彦辰,男,1988年生,博士,主要从事土石坝静动力分析和土压力计算研究。E-mail: ycliuivip@163.com E-mail:ygheitu@163.com
  • 作者简介:杨贵,男,1977年生,博士,副教授,主要从事土石坝抗震及抗震措施方面的研究工作。
  • 基金资助:

    国家自然科学基金(No. 51479059);中央高校基本科研业务费专项资金(No.2013B31914)。

Analysis of active earth pressure on retaining walls based on curved sliding surface

YANG Gui1, 2, WANG Yang-yang1, 2, LIU Yan-chen1, 2   

  1. 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. Institute of Engineering Safety and Disaster Prevention, Hohai University, Nanjing, Jiangsu 210098, China
  • Received:2015-09-21 Online:2017-08-11 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51479059) and the Fundamental Research Funds for the Central Universities (2013B31914).

摘要: 土体滑裂面形状对挡土墙主动土压力有重要影响。以无黏性填土挡墙为研究对象,假设在考虑土拱效应时,极限状态下墙后土体的滑裂面为曲线,基于水平微分单元法推导出平动模式下挡土墙主动土压力的分布。首先将计算与模型试验结果及已有理论研究成果进行对比分析,验证了方法的可靠性;其次,研究土体内摩擦角和墙-土摩擦角对主动土压力分布、合力大小和作用点高度的影响。结果表明:基于曲线滑裂面假设得到的滑动楔体范围略大于采用直线滑裂面的假设;对于不同高度的挡土墙,建议的计算结果与模型试验结果更为符合;对于不同的土体内摩擦角和墙-土摩擦角,土压力的分布形式和合力作用点与Paik解较为接近,但合力略大于Paik解。

关键词: 曲线滑裂面, 挡土墙, 土拱效应, 主动土压力

Abstract: The shape of sliding surface has important influence on the active earth pressure of retaining wall. A new active earth pressure formulation is proposed based on horizontal differential element method assuming retaining wall backfilled with cohesionless soils is under horizontal translation model. The assumption of formulation is that the sliding surface is curved when backfill behind a retaining wall reaches limit equilibrium and that the soil arching is considered. First, the reliability of the formulation is verified based on the compared calculation results of the formulation, model test and classical theory. Second, the influences of the different internal frictional angles of soil and wall-soil friction angles on the distribution, resultant and loading position of active earth pressure are analyzed. The results show the regions of sliding wedge obtained from curved sliding surface assumption are slightly bigger than the regions of plane assumption. The results by the proposed formulation are more consistent with model test results for retaining walls of different heights. The distribution form and loading position of active earth pressure are close to Paik’s solutions in different inner friction angles and friction angles on the soil-wall interface. However, the magnitudes of active earth pressure are greater than Paik’s solutions slightly.

Key words: curved sliding surface, retaining wall, soil arching effect, active earth pressure

中图分类号: 

  • TU 473.1

[1] 鲍宁, 魏静, 陈建峰. 桩承式路堤土拱效应三维离散元分析[J]. 岩土力学, 2020, 41(S1): 347-354.
[2] 刘克奇, 丁万涛, 陈瑞, 侯铭垒, . 盾构掌子面三维破坏模型构建与极限支护力计算[J]. 岩土力学, 2020, 41(7): 2293-2303.
[3] 陈建功, 杨扬, 陈彦含, 陈小兵. 考虑抗拉强度的黏性填土挡土墙主动土压力计算[J]. 岩土力学, 2020, 41(6): 1829-1835.
[4] 黄宇华, 徐林荣, 周俊杰, 蔡雨, . 基于改进Terzarghi方法的桩网地基桩土应力计算[J]. 岩土力学, 2020, 41(2): 667-675.
[5] 陈建旭, 宋文武, . 平动模式下挡土墙非极限主动土压力[J]. 岩土力学, 2019, 40(6): 2284-2292.
[6] 芮 瑞, 叶雨秋, 陈 成, 涂树杰. 考虑墙壁摩擦影响的挡土墙 主动土压力非线性分布研究[J]. 岩土力学, 2019, 40(5): 1797-1804.
[7] 陈 峥, 何 平, 颜杜民, 高红杰, . 考虑土拱效应的管棚合理间距计算方法[J]. 岩土力学, 2019, 40(5): 1993-2000.
[8] 刘 洋, 于鹏强. 刚性挡土墙平移模式的土拱形状 与主动土压力分析[J]. 岩土力学, 2019, 40(2): 506-516.
[9] 张晓曦, 何思明, 樊晓一, . L型挡土墙滑裂面确定方法与地震稳定性分析[J]. 岩土力学, 2019, 40(10): 4011-4020.
[10] 尹志强,佘成学,姚海林,卢 正,骆行文,. 考虑土拱效应的黏性填土排桩桩后土压力研究[J]. , 2018, 39(S1): 131-139.
[11] 刘美麟,侯艳娟,张顶立,房 倩. 砂土地层中考虑基坑施工效应的柔性挡墙主动土压力研究[J]. , 2018, 39(S1): 149-158.
[12] 李兆华,胡 杰,冯吉利,龚文俊. 基于黏弹塑性本构模型的泥石流数值模拟[J]. , 2018, 39(S1): 513-520.
[13] 杨山奇,卢坤林,史克宝,赵瀚天,陈一鸣,. 刚性挡土墙后三维被动滑裂面的模型试验[J]. , 2018, 39(9): 3303-3312.
[14] 赖丰文,陈福全,万梁龙,. 考虑不完全土拱效应的浅层地基竖向应力计算[J]. , 2018, 39(7): 2546-2554.
[15] 徐长节,梁禄钜,陈其志,刘元昆,. 考虑松动区内应力分布形式的松动土压力研究[J]. , 2018, 39(6): 1927-1934.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!