堆石料湿化变形的修正剑桥模型及其参数研究

doi:10.16285/j.rsm.2024.1341

岩土力学 ›› 2025, Vol. 46 ›› Issue (9): 2703-2710.doi: 10.16285/j.rsm.2024.1341CSTR: 32223.14.j.rsm.2024.1341

堆石料湿化变形的修正剑桥模型及其参数研究

周雄雄^{1, 2}，黄佳铄^{1, 2}，李若婷^{1, 2}，张建余^{1, 2}

1. 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西咸阳 712100；2. 西北农林科技大学水利与建筑工程学院，陕西咸阳 712100

收稿日期:2024-10-30 接受日期:2025-01-09 出版日期:2025-09-10 发布日期:2025-09-04
作者简介:周雄雄，男，1990年生，博士，副教授，主要从事粗粒土本构及土石坝数值模拟等方面的研究工作。E-mail: zhouxx@nwafu.edu.cn
基金资助:
国家自然科学基金青年基金资助项目（No.52209168）；陕西省博士后科研资助项目（No.2023BSHGZZHQYXMZZ14）。

Modified Cambridge model and its parameters for wetting deformation in rockfill materials

ZHOU Xiong-xiong^{1, 2}, HUANG Jia-shuo^{1, 2}, LI Ruo-ting^{1, 2}, ZHANG Jian-yu^{1, 2}

1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Xianyang, Shaanxi 712100, China; 2. College of Water Resources and Architectural Engineering, Northwest A & F University, Xianyang, Shaanxi 712100, China

Received:2024-10-30 Accepted:2025-01-09 Online:2025-09-10 Published:2025-09-04
Supported by:
This work was supported by the Young scholar Foundation of National Natural Science of China (52209168) and the Postdoctoral Research Project of Shaanxi Province (2023BSHGZZHQYXMZZ14).

摘要/Abstract

摘要： 湿化变形是心墙坝主要后期变形之一，对坝体的应力−变形性状及初次蓄水坝体安全具有重要影响。研究堆石料湿化变形的塑性模型对完善湿化塑性理论是非常必要的。基于修正剑桥模型和利用湿化应变规律修正后的湿化剪胀方程，提出了新的湿化变形塑性模型；结合试验数据，进行了参数确定和模型的验证，发现模型计算结果与试验数据吻合良好，论证了堆石料湿化变形修正剑桥模型的准确性和合理性；同时，讨论了不同围压和不同孔隙率条件下模型参数的变化规律，给出了各模型参数在不同条件下的计算方法。研究成果完善了堆石料湿化变形的塑性理论，为后续相应研究提供重要参考和支撑。

关键词: 堆石料, 湿化变形, 修正剑桥模型, 湿化剪胀方程

Abstract: Wetting deformation, one of the primary types of deformation in core wall rockfill dams, significantly affects the stress-deformation behavior of the dam structure and its safety during initial impoundment. To perfect the theory of wetting plasticity, it is essential to develop a plastic model for rockfill wetting deformation. A new plastic model for wetting deformation is proposed in this paper based on the modified Cambridge model and a wetting dilatation equation derived from the wetting strain law. Based on the test data, the parameters are determined and the model is verified. The model’s calculation results are in good agreement with the test data, confirming the accuracy and rationality of the modified Cambridge model for rockfill wetting deformation proposed in this paper. Additionally, the variation rules of model parameters under different confining pressures and porosities are analyzed, and calculation methods for each parameter under varying conditions are provided. These findings enhance the plasticity theory of rockfill wetting deformation and provide valuable reference and support for future research in this area.

Key words: rockfill material, wetting deformation, modified Cambridge model, wetting dilatancy equation

中图分类号: TV641

周雄雄, 黄佳铄, 李若婷, 张建余, . 堆石料湿化变形的修正剑桥模型及其参数研究[J]. 岩土力学, 2025, 46(9): 2703-2710.

ZHOU Xiong-xiong, HUANG Jia-shuo, LI Ruo-ting, ZHANG Jian-yu, . Modified Cambridge model and its parameters for wetting deformation in rockfill materials[J]. Rock and Soil Mechanics, 2025, 46(9): 2703-2710.

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堆石料湿化变形的修正剑桥模型及其参数研究

Modified Cambridge model and its parameters for wetting deformation in rockfill materials

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