[1]钟燕辉,王一帆,蔡鸿健,等.超固结含气黏土的改进边界面模型[J].郑州大学学报(工学版),2027,48(XX):1-8.[doi:10.13705/j.issn.1671-6833.2026.06.009]
　ZHONG Yanhui,WANG Yifan,CAI Hongjian,et al.An improved bounding surface model for overconsolidated gassy clay[J].Journal of Zhengzhou University (Engineering Science),2027,48(XX):1-8.[doi:10.13705/j.issn.1671-6833.2026.06.009]
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超固结含气黏土的改进边界面模型()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
48
期数:
2027年XX
页码:
1-8
栏目:
出版日期:
2027-12-10

文章信息/Info

Title:
An improved bounding surface model for overconsolidated gassy clay
作者:
钟燕辉, 王一帆, 蔡鸿健, 张 蓓, 李晓龙, 郝梅美, 臧全胜
郑州大学 水利与交通学院,河南郑州 450001
Author(s):
ZHONG Yanhui, WANG Yifan, CAI Hongjian, ZHANG Bei, LI Xiaolong, HAO Meimei , ZANG Quansheng
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China
关键词:
含气黏土; 本构模型; 超固结; 剪胀方程; 边界面模型; 不排水抗剪强度
Keywords:
Gassy clay ;  Constitutive model ;  Over-consolidation ;  Dilatancy relation ;  Bounding surface model;  Undrained shear strength
分类号:
TU431TU447P736
DOI:
10.13705/j.issn.1671-6833.2026.06.009
文献标志码:
A
摘要:
含气黏土广泛分布于软黏土沉积层中，往往具有显著的超固结特性。然而，现有本构模型多针对正常固结黏土建立，难以准确描述超固结含气黏土所表现出的峰值强度、应变软化等复杂力学行为。为此，基于边界面理论，引入形状可调的屈服面方程，构建了能够反映超固结程度变化的剪胀方程，并通过耦合气泡损伤效应与孔隙水压力作用下的气泡浸没效应，建立了一个适用于超固结含气黏土力学行为的本构模型。同时，采用所提出的本构模型，分别对比了马来西亚高岭土和Speciwhite高岭土在不同含气特性和超固结特性下的不排水抗剪强度理论预测与试验结果。验证结果表明：该模型能够准确描述低孔压下以气泡浸没效应为主导的强度增强行为，以及高孔压下以损伤效应为主导的强度弱化现象；较好地预测不同超固结比、初始饱和度及孔隙水压力条件下，马来西亚高岭土与Speciwhite高岭土的应力应变关系、有效应力路径及不排水抗剪强度的演化规律。
Abstract:
Gassy clay is widely distributed in soft clay deposits and often exhibits significant overconsolidation characteristics. However, most existing constitutive models were developed for normally consolidated clay, making it difficult to accurately describe the complex mechanical behaviors of overconsolidated gassy clay, such as peak strength and strain softening. Therefore, based on bounding surface theory, a shape adjustable yield surface equation was introduced, and a dilatancy equation reflecting the variation in the degree of overconsolidation was constructed. By coupling the bubble damage effect with the bubble flooding effect induced by pore water pressure, a constitutive model suitable for the mechanical behavior of overconsolidated gassy clay was established. Using the proposed model, theoretical predictions of undrained shear strength were compared with experimental results for Malaysian kaolin and Speciwhite kaolin under different gas and overconsolidation characteristics. Validation results indicated that the model accurately captured the strength enhancement behavior dominated by the bubble flooding effect at low pore water pressures, as well as the strength degradation phenomenon dominated by the damage effect at high pore water pressures. Furthermore, it effectively predicted the stress strain relationships, effective stress paths, and the evolution of undrained shear strength for Malaysian kaolin and Speciwhite kaolin under varying overconsolidation ratios, initial degrees of saturation, and pore water pressures.

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更新日期/Last Update: 2026-06-29