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崔 舜,雷胜友. 基于三剪强度准则的非饱和土库仑主动土压力[J]. 科学技术与工程, 2020, 20(1): 291-296.
CUI Shun.Coulomb"s Active Earth Pressure of Unsaturated Soil Based on Triple Shear Failure Criterion[J].Science Technology and Engineering,2020,20(1):291-296.
基于三剪强度准则的非饱和土库仑主动土压力
Coulomb"s Active Earth Pressure of Unsaturated Soil Based on Triple Shear Failure Criterion
投稿时间:2019-05-12  修订日期:2019-09-21
DOI:
中文关键词:  非饱和土 三剪强度准则 主动土压力 基质吸力
英文关键词:unsaturated soil triple shear failure criterion active earth pressure matric suction
基金项目:铁道部科技研究开发项目(2010G003-F)、陕西省自然科学基金项目(2001C01)和 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)
     
作者单位
崔 舜 长安大学公路学院
雷胜友 长安大学公路学院
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中文摘要:
      基于三剪强度准则,结合非饱和土抗剪强度理论,推导得到考虑多种因素影响的挡土墙库仑主动土压力表达式。该式考虑土体非饱和因素,更合理地反映中间主应力在土体强度中的作用,可用于复杂情况下的土压力计算,经算例验证了其推导合理性。相关影响因素分析表明,土压力计算值随三剪强度参数b的增大而减小;随基质吸力的增大非线性减小,而随基质吸力角的增大呈线性减小趋势,其中基质吸力变化对土压力影响较为显著。应用该式,合理确定相关土体参数,可优化设计,提高经济效益,为非饱和土地区工程实践提供参考。
英文摘要:
      Based on the triple shear failure criterion, combined with the shear strength theory of unsaturated soil,the expression of Coulomb"s active earth pressure on retaining wall considering various factors is derived. The expression considers unsaturated factors of soil and reflects the role of intermediate principal stress in the strength of soil. It can be used to calculate the earth pressure under complex conditions. The rationality of its derivation is verified by examples. The analysis of relevant factors shows that the calculated value of earth pressure decreases with the increase of triple shear failure criterion parameter b; it decreases nonlinearly with the increase of matric suction and decreases linearly with the increase of matric suction angle, in which the variation of matric suction has a significant effect on earth pressure. Applying this expression and determining soil parameters reasonably can optimize the design, improve economic benefits, and provide reference for engineering practice in unsaturated soil areas.
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