One-dimensional swelling characteristics of expansive soils considering influence of initial states

YE Yun-xue; ZOU Wei-lie; HAN Zhong; XIE Peng; ZHANG Jun-feng; XU Yong-fu

doi:10.11779/CJGE202108017

Volume 43 Issue 8

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2021 > 43(8): 1518-1525. > DOI: 10.11779/CJGE202108017

YE Yun-xue, ZOU Wei-lie, HAN Zhong, XIE Peng, ZHANG Jun-feng, XU Yong-fu. One-dimensional swelling characteristics of expansive soils considering influence of initial states[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(8): 1518-1525. DOI: 10.11779/CJGE202108017

Citation:

PDF (662 KB)

One-dimensional swelling characteristics of expansive soils considering influence of initial states

1.
School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, China
2.
School of Civil Engineering, Wuhan University, Wuhan 430072, China
3.
Guangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510500, China
4.
China Construction Third Bureau Co., Ltd., Wuhan 430074, China
5.
School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China

More Information

Received Date: December 24, 2020
Available Online: December 02, 2022

Graphical Abstract

Abstract

Abstract

Taking the Nanyang medium expansive soil as the research object, the evolution laws of the swelling force and swelling rate of unsaturated remolded soils under different initial conditions (including suction, water content and dry density, etc.) are explored through indoor one-dimensional swelling characteristic tests and soil-water characteristic tests. The test results show that under different initial water contents, the unloaded expansion rate has a power function relationship with the initial suction, and this function relationship has nothing to do with the initial dry density. The swelling force increases as a power function with the increase of the initial dry density, while the swelling force first increases and then decreases with the increase of the initial water content. The swelling force has a power function relationship with the initial dry density and final water absorption. A three-variable model for the initial dry density-final water absorption-swelling force is given. A unified model for the initial water content-initial dry density-initial suction-swelling force within the full suction range is established. The proposed model has few parameters and unified left and right dimensions of the equation, and it has good consistency with the experimental data, which is convenient for engineering application. The research results provide a reliable theoretical method for the analysis of the swelling characteristics and soil-water characteristics of the unsaturated Nanyang expansive soil.
- expansive soil,
- swelling property,
- soil-water characteristic,
- initial state,
- model

FullText(HTML)

References (20)

References

[1]	陈正汉. 非饱和土与特殊土力学的基本理论研究[J]. 岩土工程学报, 2014, 36(2): 201-272. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201402002.htm CHEN Zheng-han. On basic theories of unsaturated soils and special soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 201-272. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201402002.htm
[2]	李献民, 王永和, 杨果林, 等. 击实膨胀土工程变形特征的试验研究[J]. 岩土力学, 2003, 24(5): 826-830. doi: 10.3969/j.issn.1000-7598.2003.05.029 LI Xian-min, WANG Yong-he, YANG Guo-lin, et al. Test study on engineering deformation characteristics of compacted expansive soil[J]. Rock and Soil Mechanics, 2003, 24(5): 826-830. (in Chinese) doi: 10.3969/j.issn.1000-7598.2003.05.029
[3]	徐永福, 孙德安, 董平. 膨润土及其与砂混合物的膨胀试验[J]. 岩石力学与工程学报, 2003, 22(3): 451-455. doi: 10.3321/j.issn:1000-6915.2003.03.022 XU Yong-fu, SUN De-an, DONG Ping. Swelling tests on bentonite and sand-bentonite mixture[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(3): 451-455. (in Chinese) doi: 10.3321/j.issn:1000-6915.2003.03.022
[4]	于海浩, 孙德安, 韦昌富, 等. 氯化钠溶液饱和不同初始含水率膨润土的膨胀特性[J]. 岩土工程学报, 2019, 41(3): 595-600. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201903028.htm YU Hai-bo, SUN De-an, WEI Chang-fu, et al. Swelling characteristics of bentonite with different initial water contents saturated by NaCl solution[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(3): 595-600. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201903028.htm
[5]	石北啸, 陈生水, 韩华强, 等. 考虑吸力变化的膨胀土边坡破坏规律分析[J]. 水利学报, 2014, 45(12): 1499-1506. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201412016.htm SHI Bei-xiao, CHEN Sheng-shui, HAN Hua-qiang, et al. Failure law of the expansive soil slope considering the suction changes[J]. Journal of Hydraulic Engineering, 2014, 45(12): 1499-1506. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201412016.htm
[6]	韩华强, 陈生水, 郑澄锋. 非饱和膨胀土强度及变形特性试验研究[J]. 岩土工程学报, 2008, 30(12): 1872-1876. doi: 10.3321/j.issn:1000-4548.2008.12.017 HAN Hua-qiang, CHEN Sheng-shui, ZHENG Cheng-feng. Experimental study on strength and deformation of unsaturated expansive soils[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(12): 1872-1876. (in Chinese) doi: 10.3321/j.issn:1000-4548.2008.12.017
[7]	贾景超. 膨胀土膨胀机理及细观膨胀模型研究[D]. 大连: 大连理工大学, 2010. JIA Jing-chao. Study on the Swelling Mechanism and Mesomechanical Swelling Model of Expansive Soils[D]. Dalian: Dalian University of Technology, 2010. (in Chinese)
[8]	范秋雁, 梁昕, 韩进仕. 非饱和膨胀岩饱和度及胀缩特性试验研究[J]. 岩石力学与工程学报, 2020, 39(1): 45-56. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202001005.htm FAN Qiu-yan, LIANG Xin, HAN Jin-shi. Experimental study on saturation and swelling-shrinkage characteristics of unsaturated expansive rocks[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(1): 45-56. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202001005.htm
[9]	邹维列, 叶云雪, 韩仲. 基于化学反应动力学方程的一维膨胀时程模型[J]. 岩土工程学报, 2020, 42(4): 737-744. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202004022.htm ZOU Wei-lie, YE Yun-xue, HAN Zhong. Chemical reaction kinetics based models for describing evolution of one-dimensional expansion with time[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(4): 737-744. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202004022.htm
[10]	WEBB S W. A simple extension of two-phase characteristic curves to include the dry region[J]. Water Resources Research, 2000, 36(6): 1425-1430.
[11]	LU S, REN T, GONG Y, et al. Evaluation of three models that describe soil water retention curves from saturation to oven dryness[J]. Soil Science Society of America Journal, 2008, 72(6): 1542-1546.
[12]	SCHNEIDER M, GOSS K U. Prediction of water retention curves for dry soils from an established pedotransfer function: evaluation of the Webb model[J]. Water Resources Research, 2012, 48(6): W06603.
[13]	叶云雪, 邹维列, 袁斐, 等. 基于土壤转换函数(PTF)预测不同初始孔隙比土的土-水特征曲线[J]. 岩土工程学报, 2018, 40(12): 2305-2311. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201812022.htm YE Yun-xue, ZOU Wei-lie, YUAN Fei, et al. Predicating soil-water characteristic curves of soils with different initial void ratios based on a pedotransfer function[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(12): 2305-2311. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201812022.htm
[14]	刘岩, 吴天前, 邹维列. 强膨胀土自然膨胀特性的试验研究[J]. 华中科技大学学报：自然科学版, 2020, 48(2): 29-35. https://www.cnki.com.cn/Article/CJFDTOTAL-HZLG202002006.htm LIU Yan, WU Tian-qian, ZOU Wei-lie. Experimental study on humidification deformation of expansive soil[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2020, 48(2): 29-35. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HZLG202002006.htm
[15]	BURTON G J, SHENG D, CAMPBELL C. Bimodal pore size distribution of a high-plasticity compacted clay[J]. Géotechnique Letters, 2014, 4(2): 88-93.
[16]	谭罗荣, 孔令伟. 膨胀土膨胀特性的变化规律研究[J]. 岩土力学, 2004, 25(10): 1555-1559. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX200410009.htm TAN Luo-rong, KONG Ling-wei. Study on variation regularity of swelling behavior of expansive soil[J]. Rock and Soil Mechanics, 2004, 25(10): 1555-1559. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX200410009.htm
[17]	MANCA D, FERRARI A, LALOUI L. Fabric evolution and the related swelling behaviour of a sand/bentonite mixture upon hydro-chemo-mechanical loadings[J]. Géotechnique, 2016, 66(1): 41-57.
[18]	ZOU W L, YE J B, HAN Z, et al. Effect of montmorillonite content and sodium chloride solution on the residual swelling pressure of an expansive clay[J]. Environmental Earth Sciences, 2018, 77(19): 1-12.
[19]	卢肇钧, 吴肖茗, 孙玉珍, 等. 膨胀力在非饱和土强度理论中的作用[J]. 岩土工程学报, 1997, 19(5): 20-27. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC705.003.htm LU Zhao-jun, WU Xiao-ming, SUN Yu-zhen, et al. The role of swelling pressure in the shear strength theory of unsaturated soils Chinese Journal of Geotechnical Engineering, 1997, 19(5): 20-27. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC705.003.htm
[20]	TU H, VANAPALLI S K. Prediction of the variation of swelling pressure and 1-D heave of expansive soils with respect to suction using the soil water retention curve as a tool[J]. Canadian Geotechnical Journal, 2016, 53(8): 1213-1234.