Study on Creep Mechanical Properties and Constitutive Models of Silty Clay with Different Compaction Degrees

Authors

LI Mingchao, CCCC Second Highway Engineering Co ., Ltd., Xi’an, Shaanxi 710061, ChinaFollow
WU Gangrong, CCCC Second Highway Engineering Co ., Ltd., Xi’an, Shaanxi 710061, China

Abstract

In order to ensure the smooth construction and long-term stable operation of silty clay sections in the Zhoukou –Pingdingshan highway project,this paper conducted one-dimensional creep tests on silty clay samples with different compaction degrees under different stress levels and studied the effect law of compaction degree on its long-term creep mechanical properties.By establishing the corresponding creep constitutive models,a theoretical basis was provided for the prevention and control of creep failure in silty clay subgrades in engineering practice.Research results show that:① Under the same stress level,with the increase of compaction degree,the instantaneous strain,creep strain,and total strain of the samples all decrease significantly.Among them,the compaction degree has the most obvious inhibitory effect on the creep strain of the samples,followed by the total strain,and the inhibitory effect on the instantaneous strain of the samples is minimal;② The variation laws of the void ratio-logarithm of time (e-lg t) curves of samples with different compaction degrees are basically consistent,which can all be divided into three stages.At the same stress level,the total reduction in void ratio of the samples becomes smaller as the compaction degree increases;③ Under the same stress level,with the increase of compaction degree,the parameters E1,E2,η1,and η2 in the Burgers model all show an increasing trend,indicating that the instantaneous elastic deformation,viscoelastic deformation,and the steady-state creep rate of the samples are all decreasing,while the duration of the samples in the stable-state creep stage is increasing.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.005

First Page

36

Last Page

44

Submission Date

December 2025

Recommended Citation

Mingchao, LI and Gangrong, WU (2025) "Study on Creep Mechanical Properties and Constitutive Models of Silty Clay with Different Compaction Degrees," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 5.
DOI: 10.14048/j.issn.1671-2579.2025.06.005
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/5

Reference

[1]訾银辉,申姁宁,张浩,等.温度对高液限土吸附结合水及其变形影响的试验研究 [J].中外公路,2024,44(4):11-17.ZI Yinhui,SHEN Xuning,ZHANG Hao,et al.Experimental study on effect of temperature on bound water adsorption and deformation of high liquid limit soil[J].Journal of China & Foreign Highway,2024,44(4):11-17.
[2]徐淑亮.贵州高含水率高液限黏土压实控制方法研究[J].中外公路,2023,43(2):31-35.XU Shuliang.Research on compaction control method of high water content and high liquid limit clay in Guizhou Province [J].Journal of China & Foreign Highway,2023,43(2):31-35.
[3]丁智,虞健刚,孙苗苗,等.结构性软黏土的循环累积应变特性研究 [J].中外公路,2023,43(3):231-236.DING Zhi,YU Jiangang,SUN Miaomiao,et al.Research on cyclic accumulative strain characteristics of structured soft clay [J].Journal of China & Foreign Highway,2023,43(3):231-236.
[4]王江滔,包特门白乙拉,杨伟光,等.含水率 -温度双因素影响的红黏土力学特性分析 [J].中外公路,2023,43(3):253-258.WANG Jiangtao,BAO Temenbaiyila,YANG Weiguang,et al.Analysis of influence of moisture content-temperature dual factor on mechanical properties of red clay[J].Journal of China & Foreign Highway,2023,43(3):253-258.
[5]PALMER J.Creeping earth could hold secret to deadly landslides [J].Nature,2017,548(7668 ):384-386.
[6]张卫兵,谢永利,杨晓华.压实黄土的一维次固结特性研究[J].岩土工程学报,2007,29(5):765-768.ZHANG Weibing,XIE Yongli,YANG Xiaohua.Research on 1D secondary consolidation characteristics of compacted loess [J].Chinese Journal of Geotechnical Engineering,2007,29(5):765-768.
[7]徐珊,陈有亮,赵重兴.单向压缩状态下上海地区软土的蠕变变形与次固结特性研究 [J].工程地质学报,2008,16(4):495-501.XU Shan,CHEN Youliang,ZHAO Chongxing.One-dimensional consolidation tests of creep deformation and secondary consolidation characteristics of soft soils in Shanghai area [J].Journal of Engineering Geology,2008,16(4):495-501.
[8]ÉYUBOV A A.Creep of collapsible loess soil under overall compression [J].Soil Mechanics and Foundation Engineering,1986,23(3):121-125.
[9]吴宏伟,李青,刘国彬.上海黏土一维压缩特性的试验研究[J].岩土工程学报,2011,33(4):630-636.WU Hongwei,LI Qing,LIU Guobin.Characteristics of one-dimensional compressibility of Shanghai clay [J].Chinese Journal of Geotechnical Engineering,2011,33(4):630-636.
[10]XIE X,QI S W,ZHAO F S,et al.Creep behavior and the microstructural evolution of loess-like soil from Xi ’an area,China [J].Engineering Geology,2018,236:43-59.
[11]杨爱武,梁振振,杨少坤,等.天津滨海重塑软黏土一维固结蠕变特性研究 [J].地下空间与工程学报,2022,18(5):1532 -1538.YANG Aiwu,LIANG Zhenzhen,YANG Shaokun,et al.Study on the one-dimensional consolidation creep characteristics of Tianjin Binhai remoulded soft clay [J].Chinese Journal of Underground Space and Engineering,2022,18(5):1532 -1538.
[12]翁鑫荣,王旭东,宰金珉,等.应力历史对软黏土蠕变特性的影响 [J].南京工业大学学报 (自然科学版 ),2008,30(6):32-36.WENG Xinrong,WANG Xudong,ZAI Jinmin,et al.Influence of stress history on creep behavior of soft clay[J].Journal of Nanjing University of Technology (Natural Science Edition ),2008,30(6):32-36.
[13]孙希望,李良吉,杨果岳,等.昆明地区压实红黏土蠕变特性研究 [J].土工基础,2018,32(1):50-54,58.SUN Xiwang,LI Liangji,YANG Guoyue,et al.Rheological properties of the compacted red clay in Kunming Region [J].Soil Engineering and Foundation,2018,32(1):50-54,58.
[14]SINGH A,MITCHELL J K.General stress-strain-time function for soils [J].Journal of the Soil Mechanics and Foundations Division,1968,94(1):21-46.
[15]余湘娟,殷宗泽,高磊.软土的一维次固结双曲线流变模型研究 [J].岩土力学,2015,36(2):320-324.YU Xiangjuan,YIN Zongze,GAO Lei.A hyperbolic rheological model for one-dimensional secondary consolidation of soft soils [J].Rock and Soil Mechanics,2015,36(2):320-324.
[16]YIN J H.Non-linear creep of soils in oedometer tests [J].Géotechnique,1999,49(5):699-707.
[17]何利军.湛江黏土一维蠕变模型研究 [J].南昌航空大学学报 (自然科学版 ),2013,27(2):85-88.HE Lijun.Study on one-dimensional creep constitutive relations for clay in Zhanjiang area [J].Journal of Nanchang Hangkong University (Natural Sciences ),2013,27(2):85-88.
[18]姚亚锋,程桦,荣传新,等.人工冻结黏土广义开尔文蠕变本构模型模糊随机优化 [J].煤田地质与勘探,2019,47(2):162-167.YAO Yafeng,CHENG Hua,RONG Chuanxin,et al.Fuzzy random optimization of generalized Kelvin constitutive model for creep of artificial freezing clay [J].Coal Geology & Exploration,2019,47(2):162-167.
[19]张豫川,高飞,吕国顺,等.基于黄土蠕变试验的高填方地基沉降的数值模拟 [J].科学技术与工程,2018,18(30):220-227.ZHANG Yuchuan,GAO Fei,LYU Guoshun,et al.Numerical simulation of high fill foundation settlement based on creep test of loess [J].Science Technology and Engineering,2018,18(30):220-227.
[20]朱杰兵,汪斌,邬爱清.锦屏水电站绿砂岩三轴卸荷流变试验及非线性损伤蠕变本构模型研究 [J].岩石力学与工程学报,2010,29(3):528-534.ZHU Jiebing,WANG Bin,WU Aiqing.Study of unloading triaxial rheological tests and its nonlinear damage constitutive model of Jinping hydropower station green sandstone [J].Chinese Journal of Rock Mechanics and Engineering,2010,29(3):528-534.