Discrete element simulation and theoretical study on non-limit active earth pressure of sand under RB mode

SUN Jia-zheng; FU Yi; QIU Ya-shi; XU Chang-jie; ZHANG Heng-zhi; FENG Guo-hui

doi:10.16285/j.rsm.2022.0406

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Discrete element simulation and theoretical study on non-limit active earth pressure of sand under RB mode

更新时间：2026-06-25

- Discrete element simulation and theoretical study on non-limit active earth pressure of sand under RB mode
- Vol. 44, Issue 2, Pages: 603-614(2023)
- 作者机构：
  
  1. 浙江大学滨海和城市岩土工程研究中心,浙江,杭州,310058
  2. 浙江大学平衡建筑研究中心,浙江,杭州,310028
  3. 杭州市钱江新城建设开发有限公司,浙江,杭州,310020
  4. 华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西,南昌,330013
  5. 华东交通大学江西省岩土工程基础设施安全与控制重点实验室,江西,南昌,330013
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2022.0406
  CLC： TU432
- Online First：17 February 2023，
  
  Published：2023
- 稿件说明：
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SUN Jia-zheng, FU Yi, QIU Ya-shi, et al. Discrete element simulation and theoretical study on non-limit active earth pressure of sand under RB mode[J]. 2023, 44(2): 603-614.
DOI：

SUN Jia-zheng, FU Yi, QIU Ya-shi, et al. Discrete element simulation and theoretical study on non-limit active earth pressure of sand under RB mode[J]. 2023, 44(2): 603-614. DOI： 10.16285/j.rsm.2022.0406.

摘要

针对刚性挡土墙绕墙底向外位移（RB）模式下砂土非极限主动土压力分布问题，采用离散元数值模拟对砂土的主动破坏过程进行分析。研究结果表明，非极限主动状态下，不同深度处土体内摩擦角变成极限值时，该点所需的水平位移近似相同，约为0.03%，墙-土摩擦角至极限值时该点所需的水平位移近似与深度呈线性关系，即=0.12%；挡墙位移过程中，墙后土体中存在多个相互平行的“准滑动面。根据模拟结果，在Liu提出的摩擦角调动值计算公式基础上进行了修正，并利用斜微分单元法，取墙后土楔体中平行于滑动面的薄层作为斜微分单元，建立了非极限主动状态下单元体静力平衡方程，得到了 RB 模式下挡墙不同位移量时非极限主动土压力计算公式。将计算结果与模拟结果和模型试验实测数据进行对比，验证了理论公式的合理性。

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