Abstract
Malan loess is a wind-deposited sediment that is loose and porous and has high water permeability. It has experienced many dry–wet cycles during tens of thousands of years, resulting in unique engineering properties. The unique properties of loess are closely related to its texture and microstructure formed during dry–wet cycles. This paper investigates the influence of dry–wet cycles on the microstructure of Malan loess and its formation mechanism. The results show the following. (1) In an open environment, the ion content of the loess samples decreased after the dry–wet cycles, indicating that the cementation of the loess particles had weakened and the structural strength of the loess has decreased due to the loss of cementation materials as the cycle number increased. (2) The ion content of the soil samples did not change significantly after dry–wet cycles in a closed environment. However, after several cycles, the clay and colloid particles migrated and were adsorbed around the skeleton particles, and soluble salt ions were enriched in the form of cementation, with a slight increase in structural strength. The proposed dry–wet cycle model in this paper showed that the loess structure property was weaker in an open environment and stronger in a closed environment, revealing the formation and evolution of loess structure at the microscale. The results of this study provide very important theoretical and practical engineering significance for deep understanding of the mechanical and hydraulic properties of loess and the prediction and prevention of geological disasters.
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References
Brady NC, Weil RR, Brady NC (2000) Elements of nature and properties of soils. Prentice Hall, New York
Dijkstra TA, Wasowski J, Winter MG, Meng XM (2014) Introduction to geohazards of central China. Quart J Eng Geol Hydrogeol 47:195–199. https://doi.org/10.1144/qjegh2014-054
Gao G (1988) Formation and development of the structure of collapsing loess in China. Eng Geol. 25:235–245. https://doi.org/10.1016/0013-7952(88)90029-4
Gao Y, Yu YT, Zheng JG, Liang Y (2019) Strength characteristics of compacted loess during leaching. Rock Soil Mech. 40:3833–3843. https://doi.org/10.16285/j.rsm.2019.0072
Guo Y et al (2004) Composition of loess aggregate and its relationship with CaCO_3 on the loess plateau. Acta Pedologica Sinica. 41:362–368. https://doi.org/10.11766/trxb200303310306
Hao YZ, Wang TH, Cheng L, Jin X (2021) Structural constitutive relation of compacted loess considering the effect of drying and wetting cycles. Rock Soil Mech. 42:2977–2986. https://doi.org/10.16285/j.rsm.2021.0551
Higuchi K, Chigira M, Lee DH, Wu JH (2015) Rapid weathering and erosion of mudstone induced by saltwater migration near a slope surface. J Hydrol Eng. https://doi.org/10.1061/(ASCE)HE.1943-5584.0001105
Hua K, Xiao J, Li SJ, Li Z (2020) Analysis of hydrochemical characteristics and their controlling factors in the Fen River of China. Sustain Cities Soc. https://doi.org/10.1016/j.scs.2019.101827
Khan MA, Hossain MS, Khan MS, Samir S, Aramoon A (2017) Impact of Wet-Dry Cycles on the Shear Strength of High Plastic Clay Based on Direct Shear Testing, 3rd Conference on Geotechnical Frontiers, Orlando, FL. pp. 615–622.
Li L, Zhang K, Zhang Q, Mao Y, Li G (2016) Experimental study on the loess strength degradation characteristics under the action of dry-wet and freeze-thaw cycles. J Glaciol Geocryol. 38:1142–1149. https://doi.org/10.7522/j.issn.1000-0240.2016.0133
Li XA et al (2019) Characterization of the mechanisms underlying loess collapsibility for land-creation project in Shaanxi Province, China-a study from a micro perspective. Eng Geo 249:77–88. https://doi.org/10.1016/j.enggeo.2018.12.024
Li YR, Zhang WW, He SD, Aydin A (2020) Wetting-driven formation of present-day loess structure. Geoderma. https://doi.org/10.1016/j.geoderma.2020.114564
Liu S et al (2021) Experimental study on the effects of wet-dry cycles and suction on the mechanical properties of unsaturated Xiashu loess. Journal of Southeast University. Nat Sci Ed 51:473–479
Lu HJ, Li JX, Wang WW, Wang CH (2015) Cracking and water seepage of Xiashu loess used as landfill cover undern wetting-drying cycles. Environ Earth Sci 74:7441–7450. https://doi.org/10.1007/s12665-015-4729-4
Ma F, Yang J, Bai X (2017) Water sensitivity and microstructure of compacted loess. Transp Geotech 11:41–56. https://doi.org/10.1016/j.trgeo.2017.03.003
Mady AY, Shein EV (2020) Assessment of pore space changes during drying and wetting cycles in hysteresis of soil water retention curve in Russia using X-ray computed tomography. Geoderma Reg. https://doi.org/10.1016/j.geodrs.2020.e00259
Mao YC, Li GY, Lei JX, Zhang LR, Chen ZY (2013) Experimental Study on the Effects of Wetting-drying Cycles of Compacted Loess, 3rd International Conference on Civil Engineering and Building Materials (CEBM 2013), Hong Kong, PEOPLES R CHINA, pp. 326. https://doi.org/10.4028/www.scientific.net/AMR.831.326.
Meng L, Zhang F (2018) The new concept of soil skeleton and the microstructure of loess. Constr Sci Technol. https://doi.org/10.16116/j.cnki.jskj.2018.13.002
Meng J, Li XA (2019) Effects of carbonate on the structure and properties of loess and the corresponding mechanism: an experimental study of the Malan loess, Xi’an area China. Bull Eng Geol Environ. 78:4965–4976. https://doi.org/10.1007/s10064-018-01457-z
Ping L, Vanapalli S, Tonglu L (2016) Review of collapse triggering mechanism of collapsible soils due to wetting. J Rock Mech Geotech Eng 8:256–274. https://doi.org/10.1016/j.jrmge.2015.12.002
Solanki P, Zaman M (2014) Effect of wet-dry cycling on the mechanical properties of stabilized subgrade soils. Geo-congress. https://doi.org/10.1061/9780784413272.351
Tang C, Shi B, Liu C, Zhao L, Wang B (2008) Influencing factors of geometrical structure of surface shrinkage cracks in clayey soils. Eng Geol 101:204–217. https://doi.org/10.1016/j.enggeo.2008.05.005
Tang CS, Wang DY, Shi B, Li J (2016) Effect of wetting-drying cycles on profile mechanical behavior of soils with different initial conditions. Catena 139:105–116. https://doi.org/10.1016/j.catena.2015.12.015
Wan Y, Xue Q, Wu Y, Zhao L (2015) Mechanical properties and micromechanisms of compacted clay during drying-wetting cycles. Rock Soil Mech. 36:2815–2824. https://doi.org/10.16285/j.rsm.2015.10.010
Wang Z, Yue B (1998) Diffussion characteristics of water soluable cations in engineering loess. Bull Soil Water Conserv 18:9–13. https://doi.org/10.3969/j.issn.1000-288X.1998.02.002
Wang M, Bai X, Yang J (2010) Method of specimen preparation for collapsible loess microstructure research. J Taiyuan Univ Technol. 41:283–286
Wang JJ, Zhou YF, Wu X, Zhang HP (2019) Effects of soaking and cyclic wet-dry actions on shear strength of an artificially mixed sand. Ksce J Civ Eng. 23:1617–1625. https://doi.org/10.1007/s12205-019-0896-2
Wang L et al (2020a) Characterization of the collapsible mechanisms of Malan loess on the Chinese Loess Plateau and their effects on eroded loess landforms. Human Ecol Risk Assess. 26:2541–2566. https://doi.org/10.1080/10807039.2020.1721265
Wang T, Hao Y, Wang Z, Cheng L, Li J (2020b) Experimental study on dynamic strength properties of compacted loess under wetting-drying cycles. Chin J Rock Mechan Eng. 39:1242–1251. https://doi.org/10.13722/j.cnki.jrme.2019.0945
Wen BP, Yan YJ (2014) Influence of structure on shear characteristics of the unsaturated loess in Lanzhou. China. Eng Geol. 168:46–58. https://doi.org/10.1016/j.enggeo.2013.10.023
Wu B et al (2019) In-situ monitoring of moisture field and estimation of unsaturated permeability coefficient of loess foundation. J Disaster Prev Mitig Eng. 39:691–699. https://doi.org/10.13409/j.cnki.jdpme.2019.05.001
Xu J, Li YF, Wang SH, Wang QZ, Ding JL (2020) Shear strength and mesoscopic character of undisturbed loess with sodium sulfate after dry-wet cycling. Bull Eng Geol Environ. 79:1523–1541. https://doi.org/10.1007/s10064-019-01646-4
Xu XT et al (2021) Effect of wet-dry cycles on shear strength of residual soil. Soils Found. 61:782–797. https://doi.org/10.1016/j.sandf.2021.03.001
Yates K, Fenton CH, Bell DH (2018) A review of the geotechnical characteristics of loess and loess-derived soils from Canterbury, South Island, New Zealand. Eng Geol 236:11–21. https://doi.org/10.1016/j.enggeo.2017.08.001
Ye WJ, Bai Y, Cui CY, Duan X (2020) Deterioration of the internal structure of loess under dry-wet cycles. Adv Civ Eng. https://doi.org/10.1155/2020/8881423
Yuan Z, Ni W, Tang C, Hu S, Gan J (2017) Experimental study of structure strength and strength attenuation of loess under wetting-drying cycle. Rock and Soil Mechanics. 38:1894. https://doi.org/10.16285/j.rsm.2017.07.007
Zhang M, Liu J (2010) Controlling factors of loess landslides in western China. Environ Earth Sci. 59:1671–1680. https://doi.org/10.1007/s12665-009-0149-7
Zhang N, Luo Y (2014) Influence of soluble salt on the strength characteristics of loess. Yellow River. 36:103–105. https://doi.org/10.3969/j.issn.1000-1379.2014.08.031
Zhang WW, Li YR, Wang R, Beroya-Eitner MA (2022) A model for the formation and evolution of structure of initial loess deposits. Catena. https://doi.org/10.1016/j.catena.2022.106273
Zhao L, Wu T, Yu S, Rong B (2022) Exploration on mechanical test method of improved loess under dry-wet cycles. MATEC Web of Conf 358:01031. https://doi.org/10.1051/matecconf/202235801031
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This research was financially supported by the National Natural Science Foundation of China (Grant No. 42230712, 41877225).
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Rongrong Gao: Conceptualization, Methodology, Investigation, Writing-original draft, Writing-review & editing. Xi-An Li: Conceptualization, Funding acquisition, Proofread & review. Mingxiao An: Investigation, Writing-original draft. Zhitao Hao: Investigation, Writing-review & editing. Biao Qin: Writing-review & editing. Feng Wen: Proofread & review.
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Gao, R., Li, XA., An, M. et al. Experimental study on structural effects of particle migration in Malan loess under different dry and wet conditions. Environ Earth Sci 83, 353 (2024). https://doi.org/10.1007/s12665-024-11675-2
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DOI: https://doi.org/10.1007/s12665-024-11675-2