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【目的】寒旱区湿干冻融循环作用下膨胀土输水渠道易发生浅层失稳，是膨胀土输水渠道安全运行的关键问题。【方法】以北疆伊犁河北岸干渠膨胀土为研究对象，对试样进行湿干冻融循环效应的模拟和低应力直剪试验，分析试验过程中膨胀土的裂隙参量，探讨裂隙参量与膨胀土强度特性的变化规律，研究裂隙参量对膨胀土强度特性的影响规律。【结果】结果显示：膨胀土试样的裂隙参量与黏聚力衰减率会随湿干冻融交替效应和密实程度的降低而增大，其力学性能会进一步劣化。湿干冻融循环效应下，膨胀土裂隙结构经历了快速开裂、稳步拓展、稳定发育过程，与黏聚力的快速衰减、缓慢衰减、稳定衰减阶段相对应。【结论】结果表明：抗剪强度与各裂隙参量有一定相关性，其中连通系数的变化趋势与黏聚力衰减的关联性最为密切，关联度为0.730～0.878,权重达到0.260～0.300,可定量表征湿干冻融循环效应下膨胀土的裂隙发育特征及强度衰减规律。
Abstract：[Objective]Shallow instability of expansive soil water conveyance channel is easy to occur under the action of dry and wet freeze-thaw cycles in cold and arid regions, which is the key problem for the safe operation of expansive soil water conveyance channel.[Methods]Taking the expansive soil of the North bank of the Ili River in northern Xinjiang as the research object, the simulation of wet-dry freeze-thaw cycle effect and low stress direct shear test were carried out on the sample. The crack parameters of the expansive soil during the test were analyzed, and the changing rules of the crack parameters and the strength characteristics of the expansive soil were discussed. The influence of crack parameters on the strength characteristics of the expansive soil was studied.[Results]The result show that the fracture parameters and cohesion decay rate of the expanded soil sample will increase with the decrease of wet-dry freeze-thaw effect and the density degree, and the mechanical properties will further deteriorate. Under the wet-dry freeze-thaw cycle effect, the crack structure of expansive soil experienced rapid cracking, steady expansion and steady development, corresponding to the rapid decay, slow decay and steady decay stages of cohesion, indicating that the shear strength has a certain correlation with the fracture parameters, and the change trend of the connectivity coefficient is most closely related to the decay of cohesion.[Conclusion]The correlation degree ranges from 0.730 to 0.878 and the weight ranges from 0.260 to 0.300, which can quantitatively characterize the fracture development characteristics and strength attenuation rule of expansive soil under the effect of wet-dry freeze-thaw cycle.
[1] 邓铭江.中国西北“水三线” 空间格局与水资源配置方略[J].地理学报，2018,73(7):1189-1203.DENG M J.“Three water lines” strategy:Its spatial patterns and effects on water resources allocation in northwest China[J].Acta Geographica Sinica,2018,73(7):1189-1203.
[2] 邬晓丹，罗敏，孟凡浩，等.气候暖湿化背景下新疆极端气候事件时空演变特征分析[J].干寒旱区研究，2022,39(6):1695-1705.WU X D,LUO M,MENG F H,et al.New characteristics of spatio-temporal evolution of extreme climate events in Xinjiang under the background of warm and humid climate[J].Arid Zone Research,2022,39(6):1695-1705.
[3] 钟霞.新疆北岸干渠工程不良地质渠段基础设计问题及对策措施[J].河南水利与南水北调，2015,44(12):46-48.ZHONG X.Design problems and countermeasures of poor geological canal section foundation in North Bank of Xinjiang[J].Henan Water Resources & South-to-North Water Diversion,2015,44(12):46-48.
[4] NOWAMOOZ H,MASROURI F.Relationships between soil fabric and suction cycles in compacted swelling soils[J].Engineering Geology,2010,114(3/4):444-455.
[5] TANG C S,SHI B,LIU C,et al.Experimental characterization of shrinkage and desiccation cracking in thin clay layer[J].Applied Clay Science,2011,52(1/2):69-77.
[6] 程展林，龚壁卫.膨胀土边坡[M].北京：科学出版社，2015.CHENG Z L,GONG B W.Expansive Soil Slope[M].Beijing:Science Press,2015.
[7] LU Y,LIU S H,ALONSO E,et al.Volume changes and mechanical degradation of a compacted expansive soil under freeze-thaw cycles[J].Cold Regions Science and Technology,2019,157:206-214.
[8] HUANG Y H,CHEN Y,WANG S,et al.Effects of freeze-thaw cycles on volume change behavior and mechanical properties of expansive clay with different degrees of compaction[J].International Journal of Geomechanics,2022,22(5):04022050.
[9] LI T G,KONG L W,GUO A G.The deformation and microstructure characteristics of expansive soil under freeze-thaw cycles with loads[J].Cold Regions Science and Technology,2021(192):103393-103410.
[10] 黄震，傅鹤林，韦秉旭，等.等幅干湿循环条件下膨胀土的低应力抗剪强度特征[J].四川大学学报(工程科学版),2016,48(1):70-77.HUANG Z,FU H L,WEI B X,et al.Low stress shear strength characteristics of expansive soil under constant amplitude dry wet cycle conditions[J].Journal of Sichuan University (Engineering Science Edition),2016,48(1):70-77.
[11] 吕海波，曾召田，赵艳林.干湿交替环境下膨胀土的累积损伤初探[J].自然灾害学报，2012,21(6):119-123.LYU H B,ZENG Z T,ZHAO Y L.Preliminary study on accumulative damage of expansive soil in alternation of wetting-drying environment[J].Journal of Natural Disasters,2012,21(6):119-123.
[12] 杨果林，陈子昂，张红日，等.干湿循环作用下平缓型膨胀土边坡失稳破坏机制研究[J].中南大学学报(自然科学版),2022,53(1):95-103.YANG G L,CHEN Z A,ZHANG H R,et al.Collapse mechanism of gentle expansive soil slope in drying and wetting cycles[J].Journal of Central South University (Science and Technology),2022,53(1):95-103.
[13] 胡旭辉，张坤勇，聂美军，等.干湿循环条件对膨胀土强度指标的影响[J].中南大学学报(自然科学版),2022,53(1):269-279.HU X H,ZHANG K Y,NIE M J,et al.Effect of experimental conditions on strength indexes of expansive soil during wet-dry cycles[J].Journal of Central South University (Science and Technology),2022,53(1):269-279.
[14] 边加敏.弱膨胀土干湿循环直剪强度试验研究[J].长江科学院院报，2018,35(6):81-85,91.BIAN J M.Direct shear test on strength of weak expansive soil under dry-wet cycles[J].Journal of Yangtze River Scientific Research Institute,2018,35(6):81-85,91.
[15] 陈永，黄英豪，王硕，等.冻融循环对不同压实度下膨胀土力学特性影响的试验研究[J].岩石力学与工程学报，2023,42(S2):4299-4309.CHEN Y,HUANG Y H,WANG S,et al.Effects of freeze-thaw cycles on mechanical properties of expansive soils at different compaction degrees[J].Chinese Journal of Rock Mechanics and Engineering,2023,42(S2):4299-4309.
[16] 王亮亮，王照腾，方薇，等.气候边缘地带膨胀土强度特性随冻融循环劣化规律[J].中南大学学报(自然科学版),2022,53(1):288-295.WANG L L,WANG Z T,FANG W,et al.Deteriorating law of strength properties of expansive soil in climate marginal zone with freeze-thaw cycles[J].Journal of Central South University (Science and Technology),2022,53(1):288-295.
[17] WANG M W,GE S,LI J,et al.Moisture migration tests on unsaturated expansive clays in Hefei[C]//IEEE.2013 Fifth International Conference on Measuring Technology and Mechatronics Automation.Hong Kong,China:IEEE,2013:698-701.
[18] 许雷，刘斯宏，鲁洋，等.冻融循环下膨胀土物理力学特性研究[J].岩土力学，2016,37(S2):167-174.XU L,LIU S H,LU Y,et al.Research on physical and mechanical properties of expansive soil under freeze-thaw cycles[J].Rock and Soil Mechanics,2016,37(S2):167-174.
[19] 张琦，杨忠年，时伟，等.冻融循环下初始含水率对非饱和膨胀土剪切特性试验[J].吉林大学学报(地球科学版),2021,51(5):1544-1550.ZHANG Q,YANG Z N,SHI W,et al.Experiment on shear characteristics of unsaturated expansive soil with initial moisture content under freezing-thawing cycles[J].Journal of Jilin University (Earth Science Edition),2021,51(5):1544-1550.
[20] 龚壁卫.膨胀土裂隙、强度及其与边坡稳定的关系[J].长江科学院院报，2022,39(10):1-7.GONG B W.Relationship of fracture and strength with stability of expansive soils[J].Journal of Yangtze River Scientific Research Institute,2022,39(10):1-7.
[21] 杨济铭，张红日，陈林，等.基于数字图像相关技术的膨胀土边坡裂隙形态演化规律分析[J].中南大学学报(自然科学版),2022,53(1):225-238.YANG J M,ZHANG H R,CHEN L,et al.Analysis of crack morphology evolution law of expansive soil slope based on digital image correlation technology[J].Journal of Central South University (Science and Technology),2022,53(1):225-238.
[22] 骆赵刚，汪时机，杨振北.膨胀土湿干胀缩裂隙演化及其定量分析[J].岩土力学，2020,41(7):2313-2323.LUO Z G,WANG S J,YANG Z B.Quantitative analysis of fracture evolution of expansive soils under wetting-drying cycles[J].Rock and Soil Mechanics,2020,41(7):2313-2323.
[23] 曹雪山，章纬，李国维，等.膨胀土裂隙发育特征定量化方法的试验研究[J].岩土工程学报，2023,45(12):2556-2564.CAO X S,ZHANG W,LI G W,et al.Experimental study on quantitative method for crack development characteristics of expansive soils[J].Chinese Journal of Geotechnical Engineering,2023,45(12):2556-2564.
[24] 唐朝生，施斌，崔玉军.土体干缩裂隙的形成发育过程及机理[J].岩土工程学报，2018,40(8):1415-1423.TANG C S,SHI B,CUI Y J.Behaviors and mechanisms of desiccation cracking of soils[J].Chinese Journal of Geotechnical Engineering,2018,40(8):1415-1423.
[25] 袁俊平，殷宗泽，包承纲.膨胀土裂隙的量化手段与度量指标研究[J].长江科学院院报，2003,20(6):27-30.YUAN J P,YIN Z Z,BAO C G.Quantitative description method & index for fissures in expansive soils[J].Journal of Yangtze River Scientific Research Institute,2003,20(6):27-30.
[26] 胡东旭，李贤，周超云，等.膨胀土干湿循环胀缩裂隙的定量分析[J].岩土力学，2018,39(S1):318-324.HU D X,LI X,ZHOU C Y,et al.Quantitative analysis of swelling and shrinkage cracks in expansive soil[J].Rock and Soil Mechanics,2018,39(S1):318-324.
[27] 蔡正银，朱洵，黄英豪，等.湿干冻融耦合循环作用下膨胀土裂隙演化规律[J].岩土工程学报，2019,41(8):1381-1389.CAI Z Y,ZHU X,HUANG Y H,et al.Evolution rules of fissures in expansive soils under cyclic action of coupling wetting-drying and freeze-thaw[J].Chinese Journal of Geotechnical Engineering,2019,41(8):1381-1389.
[28] 蔡正银，朱洵，张晨，等.高寒区膨胀土渠道边坡性能演变规律[J].中南大学学报(自然科学版),2022,53(1):21-50.CAI Z Y,ZHU X,ZHANG C,et al.Performance evolution of expansive soil canal slope in high cold region[J].Journal of Central South University (Science and Technology),2022,53(1):21-50.
[29] 王森涛，姜海波，赵海蛟，等.湿干冻融循环下伊犁渠道膨胀土抗剪特性衰减研究[J].中国农村水利水电，2023(11):256-262.WANG S T,JIANG H B,ZHAO H J,et al.Research on the shear attenuation of expansive soil in Yili Channel under wet-dry freeze-thaw cycle[J].China Rural Water and Hydropower,2023,(11):256-262.
[30] 陈亮，卢亮.土体干湿循环过程中的体积变形特性研究[J].地下空间与工程学报，2013,9(2):229-235.CHEN L,LU L.Investigation on the characteristics of volumetric change during the wet-dry cycle of the soil[J].Chinese Journal of Underground Space and Engineering,2013,9(2):229-235.
[31] ZOU W L,HAN Z,ZHAO G T,et al.Effects of cyclic freezing and thawing on the shear behaviors of an expansive soil under a wide range of stress levels[J].Environmental Earth Sciences,2022,81(3):77.
[32] SAKR M A,AZZAM W R,MEGUID M A,et al.Experimental study on the effect of micro-metakaolin on the strength and swelling characteristics of expansive soils[J].Arabian Journal for Science and Engineering,2024,49(4):5835-5852.
[33] ZHANG Z,MA W,FENG W J,et al.Reconstruction of soil particle composition during freeze-thaw cycling:A review[J].Pedosphere,2016,26(2):167-179.
[34] 穆彦虎，马巍，李国玉，等.冻融作用对压实黄土结构影响的微观定量研究[J].岩土工程学报，2011,33(12):1919-1925.MU Y H,MA W,LI G Y,et al.Quantitative analysis of impacts of freeze-thaw cycles upon microstructure of compacted loess[J].Chinese Journal of Geotechnical Engineering,2011,33(12):1919-1925.
[35] ZHU R,CAI Z Y,HUANG Y H,et al.Effects of wetting-drying-freezing-thawing cycles on mechanical behaviors of expansive soil[J].Cold Regions Science and Technology,2022,193:103422.
基本信息:
DOI：10.13928/j.cnki.wrahe.2025.07.014
中图分类号:TU443
引用信息:
[1]姜海波,张军,喻天龙,等.湿干冻融下渠基膨胀土裂隙发育与强度衰减规律研究[J].水利水电技术(中英文),2025,56(07):190-200.DOI:10.13928/j.cnki.wrahe.2025.07.014.
基金信息:
自治区“天山英才”青年拔尖人才培养计划(2024TSYCCX0037); 国家自然科学基金项目(52369021); 第二批“天山英才”优秀工程师培养计划项目(2024—2026)
2025-07-20
2025-07-20