Modified Duncan-Chang constitutive model for soft soil stabilized by magnesium oxysulfate cement considering three effect factors

被引：0
|
作者：
Zhu J. [1 ,2 ]
Xu R. [3 ,4 ]
Luo Z. [1 ,2 ]
Rao C. [5 ]
机构：
[1] School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou
[2] Institute of Tunnel and Underground Space, Zhejiang University of Science and Technology, Hangzhou
[3] Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou
[4] Zhejiang-California International Nano Systems Institute Taizhou Branch, Taizhou
[5] School of Civil Environmental Engineering, Ningbo University, Ningbo
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Curing agent dosages; Curing date; Initial water content; Magnesium oxysulfate cement; Solidified soil;
D O I：
10.11817/j.issn.1672-7207.2020.07.024
中图分类号：
学科分类号：
摘要：
To study the effects of initial water contents(w), curing agent dosages(Wg) and ages(T) on the mechanical properties of soft soil solidified by magnesium oxysulfate cement, a series of undrained triaxial tests were conducted on the cured soil with different initial water contents, curing agent dosages and ages. According to the experimental results, the empirical relationship between the Duncan-Chang model parameters such as K, c and φ and w, Wg and T was studied. Subsequently, the modified Duncan-Chang model of solidified soil considering initial water contents, curing agent dosages and ages was developed and proved to be accurate and reliable. The results show that the failure modes of solidified soil can be mainly divided into two models, lateral-bulging-failure model and oblique-shear-failure model. The stress-strain relationship mainly covers two different patterns, i. e., strain hardening and strain softening. With the decrease of the water content and the increase of the curing agent dosage and the age, the strength and stiffness of solidified soil behave stronger. The modified Duncan-Chang model of solidified soil is accurate and reliable. © 2020, Central South University Press. All right reserved.
引用
收藏
页码：1989 / 2001
页数：12
相关论文
共 23 条
  • [1] ZHU Wei, ZHANG Chunlei, GAO Yufeng, Et al., Fundamental mechanical properties of solidified dredged marine sediment, Journal of Zhejiang University(Engineering Science), 39, 10, pp. 1561-1565, (2005)
  • [2] DONG Yining, ZHANG Qinge, XU Riqing, Et al., The experimental research of strength with solidifying agent on clay, Rock and Soil Mechanics, 29, 2, pp. 475-478, (2008)
  • [3] KOLIAS S, KASSELOURI-RIGOPOULOU V, KARAHALIOS A., Stabilisation of clayey soils with high calcium fly ash and cement, Cement and Concrete Composites, 27, 2, pp. 301-313, (2005)
  • [4] HORPIBULSUK S, RACHAN R, CHINKULKIJNIWAT A, Et al., Analysis of strength development in cement-stabilized silty clay from microstructural considerations, Construction and Building Materials, 24, 10, pp. 2011-2021, (2010)
  • [5] XU Riqing, CHANG Shuai, YU Yuanhong, Et al., Model of strength developed with response surface methodology for solidified marine soft clay of Hangzhou, Journal of Zhejiang University(Engineering Science), 48, 11, pp. 1941-1946, (2014)
  • [6] YANG Aiwu, ZHONG Xiaokai, LIANG Chao, Et al., Experiment study of solidification performance and long-term mechanical properties of dredger filled mud, Rock and Soil Mechanics, 38, 9, pp. 2589-2596, (2017)
  • [7] TONG Xiaodong, GONG Xiaonan, JIANG Yongsheng, Elastic-plastic damage model of cement-stabilized soil, Engineering Mechanics, 19, 6, pp. 33-38, (2002)
  • [8] WANG Jun, DING Guangya, PAN Linyou, Et al., Study of mechanics behavior and constitutive model of cemented soil under static triaxial tests, Rock and Soil Mechanics, 31, 5, pp. 1407-1412, (2010)
  • [9] ZHANG Tao, LIU Songyu, CAI Guojun, Boundary surface plasticity model for lignin-treated silt considering cementation, Chinese Journal of Geotechnical Engineering, 38, 4, pp. 670-680, (2016)
  • [10] HU Yayuan, YU Qizhi, ZHANG Chaojie, Et al., Duncan-Chang model for fiber reinforced solidified sludge, Journal of Zhejiang University(Engineering Science), 51, 8, pp. 1500-1508, (2017)
123