Objective The water-holding characteristics and strength characteristics of unsaturated lime-stabilized loess cushion layers were investigated, and the influence of different lime contents on its matric suction and strength was revealed, in order to provide guidance and reference for the construction and theoretical research of loess building foundations and subgrades. Methods Laboratory soil-water characteristic tests and unsaturated triaxial tests were conducted to study the soil-water characteristics, unsaturated strength, and softening constitutive model of lime-stabilized unsaturated loess. Four lime contents (0, 3%, 6%, and 9%) were set to reveal the influence of lime content on matric suction. The matric suction was set at 0, 50, 100 kPa, and 200 kPa, respectively, to explore its influence on strength. Results ① Matric suction increased with increasing lime content. ② A soil-water characteristic model considering the influence of lime content was proposed, and this model could accurately describe the soil-water characteristics of lime-stabilized loess. A nonlinear model capable of describing the softening behavior of lime-stabilized loess was established by introducing a damage variable. ③ The cohesion and internal friction angle of the stabilized soil increased as the lime content increased. When the lime content was 9%, with the increase of matric suction, the cohesion of the lime-stabilized loess gradually increased, while the change in the internal friction angle was very small. Conclusion The lime content on the soil-water characteristics of stabilized loess has a significant influence. Additionally, the nonlinear model can accurately describe the stress-strain curve of lime-stabilized soil, yielding relatively good results.
文献参数: 梁志超, 张爱军, 任文渊, 等.石灰固化黄土土水特征及软化本构模型[J].水土保持通报,2026,46(2):23-31. Citation:Liang Zhichao, Zhang Aijun, Ren Wenyuan, et al. Soil-water characteristics and softening constitutive model of lime-stabilized loess [J]. Bulletin of Soil and Water Conservation,2026,46(2):23-31.
TangA M, VuM N, CuiY J. Effects of the maximum soil aggregates size and cyclic wetting-drying on the stiffness of a lime-treated clayey soil [J]. Géotechnique, 2011,61(5):421-429.
LiangZhichao, RenWenyuan, LiShuangcun, et al. Effect of soluble salt and freeze-thaw cycle on strength deterioration and water stability of lime-treated Ili loess [J]. Materials Reports, 2025,39(6):148-155.
KongYuanyuan, XieBaihan, WangQing, et al. The strength growth mechanism and damage model verification of solidified saline soil under freeze-thaw cycles [J/OL]. (2025-02-25). Journal of Changjiang River Scientific Research Institute, 2025:1-8.
WuJun, ZhangJinsheng, TanYunzhi, et al. Mechanical properties and microscopic mechanism of phosphogypsum-slag-lime solidified sediment [J]. Journal of Basic Science and Engineering, 2024,32(5):1360-1373.
ChengJia, ZhaoXiangqing, JinLan, et al. Field test study on lime pile to treat foundation in island-shaped frozen soil [J]. Journal of Railway Engineering Society, 2019,36(1):17-20.
ChaiShouxi, TianMengmeng, WeiLi, et al. The water stability and microstructure indices of sulphate saline soil stabilized with lime and fly ash [J]. Journal of Engineering Geology, 2024,32(2):430-439.
[12]
YingZi, CuiYujun, BenahmedN, et al. Changes in microstructure and water retention property of a lime-treated saline soil during curing [J]. Acta Geotechnica, 2022,17(1):319-326.
[13]
LiangZhichao, ZhangAijun, RenWenyuan, et al. Investigating the curing time effect on water retention property and microstructure of lime-treated Ili loess [J]. Bulletin of Engineering Geology and the Environment, 2023,82(7):241.
SangJin, LiuWenhua, ZhangHongyong, et al. Experimental study on soil-water characteristic curve of solidified soil in full suction range [J]. Chinese Journal of Rock Mechanics and Engineering, 2023,42(S1):3842-3850.
LiBiao, LiuJian, LiuChang, et al. The influence of dry-wet cycles on the soil-water characteristics of unsaturated soil in the hydro-fluctuation belt of Three Gorges Reservoir area [J]. Journal of Engineering Geo-logy, 2025,33(5):1969-1977.
ZhaiQian, TianGang, ZhuYiyao, et al. Physical-statistical model for estimation of hysteresis of soil-water characteristic curve [J]. Chinese Journal of Geotechnical Engineering, 2023,45(10):2072-2080.
ZhangAijun, WangYuguo, XingYichuan, et al. Fitting models for soil-water characteristic curve of total and matrix suctions of Yili loess [J]. Chinese Journal of Geotechnical Engineering, 2019,41(6):1040-1049.
CaiGuoqing, HanBowen, WangYanan, et al. Soil-water characteristic curve model of unsaturated red clay with double pore structure [J]. Chinese Journal of Geotechnical Engineering, 2022,44(S1):1-5.
CaiGuoqing, LiuYi, XuRunze, et al. Soil-water characteristic curve of dry-wet cycle of red clay in full suction range [J]. Chinese Journal of Geotechnical Engineering, 2019,41(S2):13-16.
[26]
MuntoharA S, WidiantiA, HartonoE, et al. Engineering properties of silty soil stabilized with lime and rice husk ash and reinforced with waste plastic fiber [J]. Journal of Materials in Civil Engineering, 2013,25(9):1260-1270.
[27]
WangY J, CuiY J, TangA M, et al. Changes in thermal conductivity, suction and microstructure of a compacted lime-treated silty soil during curing[J]. Engineering Geology, 2016, 202:114–121.
[28]
SivapullaiahP V, SridharanA, RameshH N. Strength behaviour of lime-treated soils in the presence of sulphate [J]. Canadian Geotechnical Journal, 2000,37(6):1358-1367.
[29]
VitaleE, DeneeleD, ParisM, et al. Multi-scale analysis and time evolution of pozzolanic activity of lime treated clays [J]. Applied Clay Science, 2017,141:36-45.
[30]
YingZi, CuiYujun, BenahmedN, et al. Changes of small strain shear modulus and microstructure for a lime-treated silt subjected to wetting-drying cycles [J]. Engineering Geology, 2021,293:106334.
ZhouBaochun, KongLingwei, GuoAiguo. Stress-strain-strength behaviour and constitutive description of lime-treated expansive soil [J]. Rock and Soil Mechanics, 2012,33(4):999-1005.
[35]
DuncanJ M, ChangC Y. Nonlinear analysis of stress and strain in soils [J]. Journal of the Soil Mechanics and Foundations Division, 1970,96(5):1629-1653.
WangLiqin, LuZhonggang, ShaoShengjun. A composite power exponential nonlinear model of rock and soil [J]. Chinese Journal of Rock Mechanics and Engineering, 2017,36(5):1269-1278.
[38]
LingXianzhang, TianShuang, TangLiang, et al. A damage-softening and dilatancy prediction model of coarse-grained materials considering freeze-thaw effects [J]. Transportation Geotechnics, 2020,22:100307.
LiangZhichao, HuZaiqiang, GuoJing, et al. Study on soil-water characteristics and compressive collapsibility of unsaturated lime loess [J]. Journal of Hydroelectric Engineering, 2020,39(3):66-75.
[41]
Van GenuchtenM T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils [J]. Soil Science Society of America Journal, 1980,44(5):892-898.
ChenYe, ZhangDengliang, WuJiahui. A study on lime stabilization of loess [J]. Journal of Chang’an University (Natural Science Edition), 1988,8(1):145-159.
[44]
LiuQuansheng, HuangShibing, KangYongshui, et al. A prediction model for uniaxial compressive strength of deteriorated rocks due to freeze-thaw [J]. Cold Regions Science and Technology, 2015,120:96-107.