力学与实践 ›› 2012, Vol. 34 ›› Issue (6): 42-45.DOI: 10.6052/1000-0879-12-169

• 应用研究 • 上一篇    下一篇

加筋土强度的理论研究及试验验证

雷胜友   

  1. 长安大学公路学院, 西安710064
  • 收稿日期:2012-04-23 修回日期:2012-09-25 出版日期:2012-12-15 发布日期:2013-02-07
  • 通讯作者: 雷胜友, 博士, 教授, 博士生导师, 研究方向为土力学与岩石力学、高铁客专地基处理. E-mail: rongrong11085310@sina.com
  • 基金资助:
    陕西省自然科学基金项目(2001C01); 地质灾害防治与地质环境保护国家重点实验室开放基金项目(GZ2005-03); 长安大学土质学与土力学精品课建设项目资助.

THE STRENGTH OF REINFORCED SOIL AND EXPERIMENTAL VERIFICATION

LEI Shengyou   

  1. Highway College, Chang'an University, Xi'an 710064, China
  • Received:2012-04-23 Revised:2012-09-25 Online:2012-12-15 Published:2013-02-07

摘要: 将加筋材料对土体强度提高的贡献等效成一种附加围压, 通过莫尔圆法, 求得小主应力增量, 并认为土体在破坏时处于极限平衡状态, 得到了黏聚力和内摩擦角同时变化时的加筋土强度表达式, 对该式作了详细讨论, 用该式计算了6 例典型加筋土在轴对称荷载下的大主应力, 结果表明计算所得大主应力值与三轴试验值比较吻合.

关键词: 加筋土|附加围压|强度指标变化

Abstract: The reinforcement of soil can be regarded as an equivalent confining pressure. Through analyzing Mohr's circle, the increase in the minor principal stress is obtained. Assuming that the soil is in a limit state at failure, a limit equilibrium equation is developed to calculate the strength of the reinforced soil while the cohesion and the internal friction angle of the reinforced soil change simultaneously. The formula is discussed in detail, the major principal pressures of the six kinds of reinforced soils under triaxial compression loading are calculated, and it is found that the calculated major principal pressures are entirely consistent with those obtained by the tri-axial tests.

Key words: reinforced soil|additional confining pressure|the change of the strength indexes

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