Research on cyclic accumulative strain characteristics of structured soft clay

Authors

DING Zhi, 1. School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, ChinaFollow
YU Jiangang, 1. School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, China
SUN Miaomiao, 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, ChinaFollow
WANG Jiawei, 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, China
YE Ke, 2. Department of Civil Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, China

Abstract

Due to its structural properties, natural soft clay is prone to produce large cumulative deformation under cyclic loads such as traffic, which has a great impact on engineering. In order to solve the deformation problem caused by structural failure of soft clay under dynamic action, dynamic characteristics of undisturbed soft clay near a highway in Hangzhou were tested by the dynamic triaxial device under cyclic loading, and the dynamic characteristics of saturated undisturbed soft clay under different effective consolidation confining pressures, vibration frequencies, and dynamic stress ratios under K0 (static earth pressure coefficient) consolidation conditions were studied. The results show that under the same test conditions, the axial strain develops faster under the action of low effective consolidation confining pressure, low vibration frequency, and high dynamic stress ratio. By considering the effect of effective consolidation confining pressure, vibration frequency, and dynamic stress ratio, the expression relation that can describe the axial cumulative strain of the soil sample is obtained, providing a basis for the deformation calculation and prediction of structural soft clay under dynamic loads such as traffic.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.036

First Page

231

Last Page

236

Submission Date

March 2025

Recommended Citation

Zhi, DING; Jiangang, YU; Miaomiao, SUN; Jiawei, WANG; and Ke, YE (2023) "Research on cyclic accumulative strain characteristics of structured soft clay," Journal of China & Foreign Highway: Vol. 43: Iss. 3, Article 36.
DOI: 10.14048/j.issn.1671-2579.2023.03.036
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss3/36

Reference

[1] MRǑZ Z, NORRIS V A, ZIENKIEWICZ O C. An anisotropic hardening model for soils and its application to cyclic loading[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1978, 2(3): 203-221. [2] 胡存. 适用于饱和黏土循环动力分析的边界面塑性模型及应用[D]. 天津: 天津大学, 2012. HU Cun. Plastic model of boundary surface suitable for cyclic dynamic analysis of saturated clay and its application[D]. Tianjin: Tianjin University, 2012. [3] ABDELKRIM M, BONNET G, DE BUHAN P. A computational procedure for predicting the long term residual settlement of a platform induced by repeated traffic loading[J]. Computers and Geotechnics, 2003, 30(6): 463-476. [4] 葛世平, 姚湘静, 叶斌, 等. 列车振动荷载作用下隧道周边软黏土长期沉降分析[J]. 岩石力学与工程学报, 2016, 35(11): 2359-2368. GE Shiping, YAO Xiangjing, YE Bin, et al. Analysis of long-term settlement of soft clay under train vibration[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(11): 2359-2368. [5] 刘明. 饱和软粘土动力本构模型研究与地铁隧道长期振陷分析[D]. 上海: 同济大学, 2006. LIU Ming. Study on dynamic constitutive model of saturated soft clay and long-term vibration subsidence analysis of subway tunnel[D]. Shanghai: Tongji University, 2006. [6] 黄茂松, 姚兆明. 循环荷载下饱和软黏土的累积变形显式模型[J]. 岩土工程学报, 2011, 33(3): 325-331. HUANG Maosong, YAO Zhaoming. Explicit model for cumulative strain of saturated clay subjected to cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(3): 325-331. [7] 黄珏皓, 陈健, 孔令智, 等. 考虑循环围压与振动频率影响的饱和软黏土动力特性试验研究[J]. 岩土力学, 2019, 40(1): 173-182. HUANG Juehao, CHEN Jian, KONG Lingzhi, et al. Experimental study of dynamic behaviors of saturated soft clay considering coupling effects of cyclic confining pressure and vibration frequency[J]. Rock and Soil Mechanics, 2019, 40(1): 173-182. [8] CUI X Z, ZHANG N, ZHANG J, et al. In situ tests simulating traffic-load-induced settlement of alluvial silt subsoil[J]. Soil Dynamics and Earthquake Engineering, 2014, 58: 10-20. [9] 吕玺琳, 方航, 张甲峰. 循环交通荷载下软土路基长期沉降理论解[J]. 岩土力学, 2016, 37(S1): 435-440. LYU Xilin, FANG Hang, ZHANG Jiafeng. Theoretical solution of long-term settlement of soft soil subgrade under cyclic traffic load[J]. Rock and Soil Mechanics, 2016, 37(S1): 435-440. [10] 马霄, 钱建固, 韩黎明, 等. 交通动载下路基长期运营沉降等效有限元分析[J]. 岩土工程学报, 2013, 35(S2): 910-913. MA Xiao, QIAN Jiangu, HAN Liming, et al. Equivalent finite element analysis of subgrade long-term operation settlement under traffic dynamic load[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 910-913. [11] 贺林林, 王元战. 饱和软黏土循环累积变形简化计算方法研究[J]. 水利学报, 2015, 46(S1): 183-187. HE Linlin, WANG Yuanzhan. Study on simplified calculation method of cyclic cumulative deformation of saturated soft clay[J]. Journal of Hydraulic Engineering, 2015, 46(S1): 183-187. [12] 陈云敏,边学成.高速交通引起的振动和沉降［C］/ /第七届全国土动力学学术会议论文集,2006:3‑13. CHEN Yunmin,BIAN Xuesheng. Vibration and settlement induced by high-speed traffic［C］//Proceedings of the Seventh National Academic Conference on Geodynamics,2006:3-13. [13] 孙德安, 许志良. 结构性软土渗透特性研究[J]. 水文地质工程地质, 2012, 39(1): 36-41. SUN Dean, XU Zhiliang. Permeability of structural soft soils[J]. Hydrogeology & Engineering Geology, 2012, 39(1): 36-41. [14] 曹勇, 孔令伟, 杨爱武. 海积结构性软土动力性状的循环荷载波形效应与刚度软化特征[J]. 岩土工程学报, 2013, 35(3): 583-589. CAO Yong, KONG Lingwei, YANG Aiwu. Waveform effect of cyclic loading of dynamic character and stiffness degradation characteristics of marine deposited natural soft clay[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(3): 583-589. [15] 白冰, 周健. 周期荷载作用下粘性土变形及强度特性述评[J]. 岩土力学, 1999, 20(3): 84-90. BAI Bing, ZHOU Jian. Some problems on behaviour of saturated clay under cyclic loading[J]. Rock and Soil Mechanics, 1999, 20(3): 84-90. [16] 郑刚, 霍海峰, 雷华阳, 等. 振动频率对饱和黏土动力特性的影响[J]. 天津大学学报, 2013, 46(1): 38-43. ZHENG Gang, HUO Haifeng, LEI Huayang, et al. Contrastive study on the dynamic characteristics of saturated clay in different vibration frequencies[J]. Journal of Tianjin University, 2013, 46(1): 38-43. [17] YASUHARA K, HIRAO K, HYDE A F L. Effects of cyclic loading on undrained strength and compressibility of clay[J]. Soils and Foundations, 1992, 32(1): 100-116. [18] 周建, 龚晓南. 循环荷载作用下饱和软粘土应变软化研究[J]. 土木工程学报, 2000, 33(5): 75-78+82. ZHOU Jian, GONG Xiaonan. Study on strain sofitn in saturated soft clay under cyclic loading[J]. China Civil Engineering Journal, 2000, 33(5): 75-78+82. [19] 王鑫, 沈扬, 王保光, 等. 列车荷载下考虑频率影响的软黏土破坏标准研究[J]. 岩土工程学报, 2017, 39(S1): 32-37. WANG Xin, SHEN Yang, WANG Baoguang, et al. Study on failure standard of soft clay considering frequency effect under train load[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(S1): 32-37. [20] 王军, 蔡袁强, 徐长节, 等. 循环荷载作用下饱和软黏土应变软化模型研究[J]. 岩石力学与工程学报, 2007, 26(8): 1713-1719. WANG Jun, CAI Yuanqiang, XU Changjie, et al. Study on strain softening model of saturated soft clay under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(8): 1713-1719. [21] MONISMITH C, OGAWA N, FREEME C. Permanent deformation characteristics of subgrade soils due to repeated loading[J].Transportation Research Record Journal of the Transportation Research Board, 1975(537):1-17. [22] 张勇, 孔令伟, 郭爱国, 等. 循环荷载下饱和软黏土的累积塑性应变试验研究[J]. 岩土力学, 2009, 30(6): 1542-1548. ZHANG Yong, KONG Lingwei, GUO Aiguo, et al. Cumulative plastic strain of saturated soft clay under cyclic loading[J]. Rock and Soil Mechanics, 2009, 30(6): 1542-1548.