Long-term characterising plastic behavior of thawed subgrade clay under cyclic loads

被引：0
|
作者：
Zhang Z. [1 ,2 ]
Fu W. [3 ]
Zhang J.-H. [1 ,2 ]
Huang C. [4 ]
机构：
[1] School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha
[2] National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha
[3] CCCC Second Highway Consultants Co.，Ltd., Wuhan
[4] School of Civil Engineering, Central South University, Changsha
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 06期
关键词：
critical dynamic stress; dynamic triaxial tests; freeze-thaw cycles; permanent deformation; road engineering; subgrade soils;
D O I：
10.13229/j.cnki.jdxbgxb.20221550
中图分类号：
学科分类号：
摘要：
The effects of the number of freeze-thaw cycles was used the method of indoor test and the stress level on the static shear strength and plastic deformation soil were investigated. The results show that the static shear strength decreases with the decrease of confining pressure and the accumulation of freeze-thaw cycles， and the permanent deformation gradually develops from plastic stability to plastic creep or incremental instability when the dynamic stress level increases. Based on the comprehensive analysis of the test results，the critical stress level to avoid the instability of permanent deformation and the discrimination criteria of each type are defined，a description formula of critical dynamic stress considering confining pressure and freeze-thaw cycles is proposed，and the ratio of shear stress generated by dynamic stress to shear strength is used to represent shear action，and a mechanical-empirical model suitable for permanent deformation of subgrade clay subjected to freeze-thaw cycles was established and verified. The results of the study can provide theoretical support for the stability and durable operation of the subgrade in the monsoon freeze zone. © 2023 Editorial Board of Jilin University. All rights reserved.
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页码：1790 / 1798
页数：8
相关论文
共 29 条
  • [21] Wang Jia-hui, Ling Xian-zhang, Li Qiong-lin, Et al., Accumulated permanent strain and critical dynamic stress of frozen silty clay under cyclic loading, Cold Regions Science and Technology, 153, pp. 130-143, (2018)
  • [22] Wolff H, Visser A T., Incorporating elasto-plasticity in granular layer pavement design, Proceedings of the Institution of Civil Engineers Transport, pp. 259-272, (1994)
  • [23] Xu Xiang-tian, Zhang Wei-dong, Fan Cai-xia, Et al., Effect of freeze-thaw cycles on the accumulative deformation of frozen clay under cyclic loading conditions: experimental evidence and theoretical model, Road Materials and Pavement Design, 7, pp. 75-84, (2019)
  • [24] Li Qiong-lin, Ling Xian-zhang, Sheng Dai-chao, Elasto-plastic behaviour of frozen soil subjected to long-term low-level repeated loading, part II: constitutive modelling, Cold Regions Science and Technology, 122, pp. 58-70, (2016)
  • [25] Tang Yi-qun, Li Jin-zhang, Experimental study on dynamic cumulative axial-strain performance of freezing—thawing saturated sandy silt, Cold Regions Science and Technology, 155, pp. 100-107, (2018)
  • [26] Tian Shuang, Tang Liang, Ling Xian-zhang, Et al., Cyclic behaviour of coarse-grained materials exposed to freeze-thaw cycles: experimental evidence and evolution model, Cold Regions Science and Technology, 167, (2019)
  • [27] Ghorbani B, Arulrajah A, Narsilio G, Et al., Experimental investigation and modelling the deformation properties of demolition wastes subjected to freeze – thaw cycles using ANN and SVR, Construction and Building Materials, 258, (2020)
  • [28] Domitrovic J, Rukavina T, Lenart S., Effect of freeze-thaw cycles on the resilient moduli and permanent deformation of RAP/natural aggregate unbound base mixtures, Transportation Geotechnics, 18, pp. 83-91, (2019)
  • [29] Zhou Zhi-wei, Ma Wei, Li Guo-yu, Et al., A novel evaluation method for accumulative plastic deformation of granular materials subjected to cyclic loading: Taking frozen subgrade soil as an example, Cold Regions Science and Technology, 12, 4, pp. 1547-1556, (2020)
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