循环荷载作用下漫灌区粉质黏土的动力特性研究

doi:10.16285/j.rsm.2024.0865

岩土力学 ›› 2025, Vol. 46 ›› Issue (4): 1215-1227.doi: 10.16285/j.rsm.2024.0865CSTR: 32223.14.j.rsm.2024.0865

循环荷载作用下漫灌区粉质黏土的动力特性研究

王梦洁^{1, 2}，张莎莎^{1, 2}，杨晓华^{1, 2}，张超¹，晏长根^{1, 2}

1．长安大学公路学院，陕西西安 710064；2．长安大学西安市绿色智慧交通岩土工程重点实验室，陕西西安 710064

收稿日期:2024-07-11 接受日期:2024-08-21 出版日期:2025-04-11 发布日期:2025-04-15
通讯作者: 张莎莎，女，1982年生，博士，副教授，主要从事特殊土工程性状以及地基基础方面的教学和科研工作。E-mail: zss_lx@126.com
作者简介:王梦洁，女，1996年生，博士研究生，主要从事特殊地基处理方面的研究工作。E-mail: 2021021004@chd.edu.cn
基金资助:
国家自然科学基金（No.42077265）；晋中市科技计划项目（市科发[2022]28号）

Dynamic characteristics of silty clay in flood irrigation areas under cyclic loading

WANG Meng-jie^{1, 2}, ZHANG Sha-sha^{1, 2}, YANG Xiao-hua^{1, 2}, ZHANG Chao¹, YAN Chang-gen^{1, 2}

1. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China; 2. Xi’an Key Laboratory of Geotechnical Engineering for Green and Intelligent Transport, Chang’an University, Xi’an, Shaanxi 710064, China

Received:2024-07-11 Accepted:2024-08-21 Online:2025-04-11 Published:2025-04-15
Supported by:
This work was supported by the National Natural Science Foundation of China (42077265) and the Jinzhong Science and Technology Plan Project (2022-28).

摘要/Abstract

摘要： 为明确交通荷载作用下漫灌区粉质黏土的动力变形特性，通过开展单样逐级和多样恒定幅值的循环加载动三轴试验，研究了围压、偏压固结比、排水条件、动荷载频率和循环应力比等因素对粉质黏土累积塑性应变和残余动孔压发展规律、滞回曲线演化特性以及软化指数的影响。结果表明：土体在动荷载作用下的累积塑性应变和残余动孔压的发展具有一致性，根据安定性理论可以将试样在不同试验条件下的动力行为划分为塑性安定、塑性蠕变和增量破坏3种典型情况，在试验基本工况下，塑性安定、塑性蠕变和增量破坏3种动力行为的界限循环应力比分别在0.30和0.40附近；处于塑性安定状态不排水试样的滞回特征明显，滞回曲线呈S形，随着加载的进行土体存在刚度退化现象；不排水试样的累积塑性变形小于排水试样，在较低循环应力比下排水和不排水条件土体的软化指数分别稳定在1.15左右和0.91左右；通过灰色关联度分析发现，循环应力比对累积塑性应变和孔压比的影响程度最大，围压对软化指数的影响程度最大；确定了适用于漫灌区粉质黏土的累积塑性应变模型的相关参数，预测效果良好。

关键词: 动三轴试验, 粉质黏土, 循环应力比, 累积塑性应变, 软化指数

Abstract: Dynamic triaxial tests were conducted to clarify the dynamic deformation characteristics of silty clay in flood irrigation areas under cyclic loading, using single-sample stepwise and multiple samples of constant amplitude. The effects of confining pressure, bias consolidation ratio, drainage conditions, dynamic load frequency, and cyclic stress ratio on the development law of cumulative plastic strain and residual dynamic pore pressure, the evolution characteristics of the hysteresis curve, and the change law of softening index of silty clay were studied. The results show that the development of cumulative plastic strain and residual dynamic pore pressure of soil under dynamic load is consistent. According to the stability theory, the dynamic behavior of samples under different test conditions can be divided into three typical cases: plastic stability, plastic creep and incremental failure. Under the basic conditions of this test, the boundary cyclic stress ratios of the three dynamic states of plastic stability, plastic creep, and incremental failure are around 0.30 and 0.40, respectively. The hysteresis characteristics of undrained specimens in the plastic stable state are obvious, and the hysteresis curve shows an S shape. With the progression of loading, soil experiences stiffness degradation. The cumulative plastic deformation of undrained specimens is smaller than that of drained specimens, and the softening index of soil under drained and undrained conditions remains stable at around 1.15 and 0.91, respectively, under lower cyclic stress ratios. Through grey relational analysis, it is found that the cyclic stress ratio has the greatest influence on the cumulative plastic strain and pore pressure ratio. The confining pressure exerts the greatest influence on the softening index. The parameters of the cumulative plastic strain model suitable for silty clay in flood irrigation areas have been determined, and the prediction effect is good.

Key words: dynamic triaxial test, silty clay, cyclic stress ratio, cumulative plastic strain, softening index

中图分类号: TU 411.3

王梦洁, 张莎莎, 杨晓华, 张超, 晏长根, . 循环荷载作用下漫灌区粉质黏土的动力特性研究[J]. 岩土力学, 2025, 46(4): 1215-1227.

WANG Meng-jie, ZHANG Sha-sha, YANG Xiao-hua, ZHANG Chao, YAN Chang-gen, . Dynamic characteristics of silty clay in flood irrigation areas under cyclic loading[J]. Rock and Soil Mechanics, 2025, 46(4): 1215-1227.

参考文献

相关文章 15

[1]	董林, 陈强, 夏坤, 李彦苍, 李燕, 王晓磊. 细粒土黏性对液化与循环软化特性影响研究[J]. 岩土力学, 2025, 46(S1): 228-237.
[2]	周波翰, 张文利, 王栋. 球形贯入仪预测超固结土强度的数值研究[J]. 岩土力学, 2025, 46(4): 1303-1309.
[3]	王滢, 刘嘉怡, 高盟, 孔祥霄, . 地震作用下深海含气能源土动力特性试验研究[J]. 岩土力学, 2025, 46(2): 457-466.
[4]	肖思奇, 黄科锋, 周红波, . 基于动三轴试验的软黏土软化系数的分析与预测[J]. 岩土力学, 2024, 45(S1): 133-146.
[5]	张杰, 聂如松, 黄茂桐, 谭永长, 李亚峰, . 道砟嵌入路基土三轴试验及离散元模拟研究[J]. 岩土力学, 2024, 45(6): 1720-1730.
[6]	黄锋, 米吉龙, 杨永浩, 董广法, 张班, 刘星辰, . 分级动荷载下土石混合体滞回曲线形态特征试验研究[J]. 岩土力学, 2024, 45(3): 674-684.
[7]	王宽君, 沈侃敏, 汪明元, 王洪羽, 国振, . 基于孔压静力触探的杭州湾海域软黏土强度解译参数研究[J]. 岩土力学, 2023, 44(S1): 521-532.
[8]	张锋, 唐康为, 尹思琪, 冯德成, 陈志国, . 冻融粉质黏土的剪切波速与动态回弹模量及其转换关系[J]. 岩土力学, 2023, 44(S1): 221-233.
[9]	杨奇, 王晓雅, 聂如松, 陈琛, 陈缘正, 徐方, . 间歇循环荷载作用下饱和砂土累积塑性变形及孔压特性研究[J]. 岩土力学, 2023, 44(6): 1671-1683.
[10]	李雪, 王滢, 高盟, 陈青生, 彭晓东, . 地震荷载作用下南海非饱和钙质砂动力特性研究[J]. 岩土力学, 2023, 44(3): 821-833.
[11]	李丽华, 张东方, 肖衡林, 王翠英, 邓永锋. 加筋稻壳灰改性土动力特性研究[J]. 岩土力学, 2023, 44(12): 3360-3369.
[12]	李明枫, 王永政, 张婷婷, . 三维应力状态下饱和软黏土循环动力特性试验研究[J]. 岩土力学, 2022, 43(6): 1523-1532.
[13]	王瑞, 泮晓华, 唐朝生, 吕超, 王殿龙, 董志浩, 施斌. MICP联合纤维加筋改性钙质砂的动力特性研究[J]. 岩土力学, 2022, 43(10): 2643-2654.
[14]	陈树峰, 孔令伟, 罗滔, . 超固结粉质黏土水平应力释放特征与静止侧压力系数计算方法[J]. 岩土力学, 2022, 43(1): 160-168.
[15]	李亚峰, 聂如松, 李元军, 冷伍明, 阮波, . 间歇性循环荷载下路基细粒土填料永久变形特性及预测模型[J]. 岩土力学, 2021, 42(4): 1065-1077.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

循环荷载作用下漫灌区粉质黏土的动力特性研究

Dynamic characteristics of silty clay in flood irrigation areas under cyclic loading

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0