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[1]王 欢,曹义康,任俊玺.干湿循环对粉砂土改良膨胀土裂隙及强度影响[J].建筑科学与工程学报,2022,39(05):213-221.[doi:10.19815/j.jace.2021.07006]
 WANG Huan,CAO Yi-kang,REN Jun-xi.Influence of Dry-wet Cycle on Crack and Strength of Silty Sand Improved Expansive Soil[J].Journal of Architecture and Civil Engineering,2022,39(05):213-221.[doi:10.19815/j.jace.2021.07006]
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干湿循环对粉砂土改良膨胀土裂隙及强度影响(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
39卷
期数:
2022年05期
页码:
213-221
栏目:
基础工程
出版日期:
2022-09-30

文章信息/Info

Title:
Influence of Dry-wet Cycle on Crack and Strength of Silty Sand Improved Expansive Soil
文章编号:
1673-2049(2022)05-0213-09
作者:
王 欢,曹义康,任俊玺
(河南大学 土木建筑学院,河南 开封 475004)
Author(s):
WANG Huan, CAO Yi-kang, REN Jun-xi
(School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, Henan, China)
关键词:
改良膨胀土 干湿循环 含水率 抗剪强度 裂隙率
Keywords:
improved expansive soil dry-wet cycle moisture content shear strength crack rate
分类号:
TU443
DOI:
10.19815/j.jace.2021.07006
文献标志码:
A
摘要:
为探究黄泛区粉砂土改良膨胀土路基在干湿循环作用下裂隙发育与强度的影响规律,设计并开展了室内干湿循环试验,分别进行了11%、13%、15%、17%四种不同含水率下改良膨胀土经历不同干湿循环次数的直剪试验,然后采用MATLAB开发的图像处理技术对干湿循环作用后的土样裂隙进行定量分析,探讨改良膨胀土的裂隙率和抗剪强度的关系。结果表明:随着含水率的增大,改良膨胀土的裂隙率、黏聚力和内摩擦角逐渐减小; 当含水率一定时,裂隙的发展随干湿循环次数的增加而增大,改良膨胀土的黏聚力和内摩擦角随着裂隙率的增大而减小; 当含水率为11%时,前两次干湿循环作用导致改良膨胀土的裂隙快速发展,裂隙率曲线较陡,黏聚力下降较快,但是内摩擦角变化不大,改良膨胀土的裂隙率和黏聚力的判定系数达到0.95; 当含水率为17%时,前4次干湿循环作用下改良膨胀土的裂隙虽然发育迟缓但裂隙率增长较快,4次干湿循环之后裂隙率的增长变得不明显,裂隙率曲线较平缓,黏聚力和内摩擦角下降较少,改良膨胀土的裂隙率和黏聚力的相关系数仅为0.70。
Abstract:
In order to explore the influence law of crack development and strength of silty sand improved expansive soil subgrade in the Yellow River flood area under the action of dry-wet cycle, the indoor dry-wet cycle tests were designed and carried out. Direct shear tests of improved expansive soil under four different moisture contents of 11%, 13%, 15% and 17% were carried out respectively. Then, the image processing technology developed by MATLAB was used to quantitatively analyze the cracks of soil samples after dry-wet cycle, and the relationship between the crack rate and shear strength of improved expansive soil was discussed. The results show that the crack rate, cohesion and internal friction angle of the improved expansive soil decreases gradually with the increase of water content. When the moisture content is constant, the development of cracks increases with the increase of dry-wet cycles, and the cohesion and internal friction angle of improved expansive soil decrease with the increase of crack rate. When the moisture content is 11%, the first two dry-wet cycles lead to the rapid development of cracks in the improved expansive soil. The crack rate curve is steep and the cohesion decreases rapidly, but the internal friction angle changes little. The correlation coefficient between the crack rate and the cohesion of the improved expansive soil reaches 0.95. When the moisture content is 17%, although the cracks of the improved expansive soil develop slowly under the first four dry-wet cycles, the crack rate increases rapidly. After the four dry-wet cycles, the growth of the crack rate becomes insignificant, the crack rate curve is relatively flat, and the decreases of cohesion and internal friction angle are less. The correlation coefficient between the crack rate and cohesion of the improved expansive soil is only 0.70.

参考文献/References:

[1] 廖世文.膨胀土与铁路工程[M].北京:中国铁道出版社,1984.
LIAO Shi-wen.Expansive Soil and Railway Engineering[M].Beijing:China Railway Publishing House,1984.
[2]刘特洪.工程建设中的膨胀土问题[M].北京:中国建筑工业出版社,1997.
LIU Te-hong.Problem of Expansive in Engineering Construction[M].Beijing:China Architecture & Building Press,1997.
[3]郑健龙,杨和平.公路膨胀土工程[M].北京:人民交通出版社,2009.
ZHENG Jian-long,YANG He-ping.Expansive Soil Engineering of Highway[M].Beijing:China Communications Press,2009.
[4]唐朝生,施 斌,刘 春.膨胀土收缩开裂特性研究[J].工程地质学报,2012,20(5):663-673.
TANG Chao-sheng,SHI Bin,LIU Chun.Study on Desiccation Cracking Behaviour of Expansive Soil[J].Journal of Engineering Geology,2012,20(5):663-673.
[5]孙树林,郑青海,唐 俊,等.碱渣改良膨胀土室内试验研究[J].岩土力学,2012,33(6):1608-1612.
SUN Shu-lin,ZHENG Qing-hai,TANG Jun,et al.Experimental Research on Expansive Soil Improved by Soda Residue[J].Rock and Soil Mechanics,2012,33(6):1608-1612.
[6]AHMADI CHENARBONI H,HAMID LAJEVARDI S,MOLAABASI H,et al.The Effect of Zeolite and Cement Stabilization on the Mechanical Behavior of Expansive soils[J].Construction and Building Materials,2021,272:121630.
[7]LU Y,LIU S H,ZHANG Y G,et al.Freeze-thaw Performance of a Cement-treated Expansive Soil[J].Cold Regions Science and Technology,2020,170:102926.
[8]杨 俊,袁 凯,张国栋,等.干湿循环对风化砂改良膨胀土回弹模量影响研究[J].长江科学院院报,2015,32(11):40-44,51.
YANG Jun,YUAN Kai,ZHANG Guo-dong,et al.Effect of Wetting-drying Cycle on Resilient Modulus of Expansive Soil Improved by Weathered Sand[J].Journal of Yangtze River Scientific Research Institute,2015,32(11):40-44,51.
[9]PHANIKUMAR B R,DEMBLA S,YATINDRA A.Swelling Behaviour of an Expansive Clay Blended with Fine Sand and Fly Ash[J].Geotechnical and Geological Engineering,2021,39(1):583-591.
[10]ZHAO G T,ZOU W L,HAN Z,et al.Evolution of Soil-water and Shrinkage Characteristics of an Expansive Clay During Freeze-thaw and Drying-wetting Cycles[J].Cold Regions Science and Technology,2021,186:103275.
[11]QI Y Z,WANG Z Z,XU H Q,et al.Instability Analysis of a Low-angle Low-expansive Soil Slope Under Seasonal Wet-dry Cycles and River-level Variations[J].Advances in Civil Engineering,2020(1):1-12.
[12]RAO S M,REDDY B V V,MUTTHARAM M.Effect of Cyclic Wetting and Drying on the Index Properties of a Lime-stabilised Expansive Soil[J].Proceedings of the Institution of Civil Engineers-Ground Improvement,2001,5(3):107-110.
[13]COSTA S,KODIKARA J,SHANNON B.Salient Factors Controlling Desiccation Cracking of Clay in Laboratory Experiments[J].Géotechnique,2013,63(1):18-29.
[14]LECOCQ N,VANDEWALLE N.Dynamics of Crack Opening in a One-dimensional Desiccation Experiment[J].Physica A:Statistical Mechanics and Its Applications,2003,321(3/4):431-441.
[15]刘观仕,陈永贵,曾宪云,等.环境湿度与温度对压实膨胀土裂隙发育影响试验研究[J].岩土工程学报,2020,42(2):260-268.
LIU Guan-shi,CHEN Yong-gui,ZENG Xian-yun,et al.Effects of Ambient Air Humidity and Temperature on Crack Development of Compacted Expansive Soils[J].Chinese Journal of Geotechnical Engineering,2020,42(2):260-268.
[16]张水兵,谢建斌,林海威,等.基于分形理论的改良膨胀土龟裂发展规律探究[J].水电能源科学,2018,36(7):95-98.
ZHANG Shui-bing,XIE Jian-bin,LIN Hai-wei,et al.Development Law of Improved Expansive Soil Cracks Based on Fractal Theory[J].Water Resources and Power,2018,36(7):95-98.
[17]包惠明,魏雪丰.干湿循环条件下膨胀土裂隙特征分形研究[J].工程地质学报,2011,19(4):478-482.
BAO Hui-ming,WEI Xue-feng.Fractal Research the Crack Characteristic Expansive Soil Under Wetting-drying Cycle[J].Journal of Engineering Geology,2011,19(4):478-482.
[18]黄 震,陈 铖.改良膨胀土胀缩裂隙及与抗剪强度的关系研究[J].水文地质工程地质,2016,43(3):87-93.
HUANG Zhen,CHEN Cheng.A Study of the Swelling Shrinkage Cracks of the Modified Expansive Soil and Its Relationship with the Shear Strength[J].Hydrogeology & Engineering Geology,2016,43(3):87-93.
[19]庄心善,彭伟珂,吴镜泊.粉煤灰改良膨胀土脱湿过程裂隙发展规律与影响因素研究[J].科学技术与工程,2017,17(6):252-258.
ZHUANG Xin-shan,PENG Wei-ke,WU Jing-bo.Study of Cracking Characteristics and Influencing Factors for Flyash-treated Expansive Soil in Dehydration Process[J].Science Technology and Engineering,2017,17(6):252-258.
[20]王建磊,王艳巧,杨广栋,等.干湿循环条件下水泥改性膨胀土变形和强度试验[J].郑州大学学报(工学版),2016,37(4):62-66.
WANG Jian-lei,WANG Yan-qiao,YANG Gang-dong, et al.Experimental Research Deformation and Shear Strength on Cement-treated Expansive Soil During Wetting-drying Cycles[J].Journal of Zhengzhou University(Engineering Science),2016,37(4):62-66.
[21]凡超文.黄泛区粉砂土改良弱膨胀土工程特性研究[D].开封:河南大学,2019.
FAN Chao-wen.Study on Engineering Characteristics of Improved Weak Expansive Soil of Silty Sand Along the Yellow Rive[D].Kaifeng:Henan University,2019.
[22]何文龙.南水北调中线新乡潞王坟膨胀土改良及生态修复研究[D].郑州:华北水利水电大学,2015.
HE Wen-long.Research on the Improvement and Ecological Restoration of the Luwangfen Expansive Soil in Xinxiang,the Middle Route of the South-to-North Water Transfer Project[D].Zhengzhou:North China University of Water Resources and Electric Power,2015.
[23]公路土工试验规程:JTG 3430—2020[S].北京:人民交通出版社,2020.
Test Methods of Soils for Highway Engineering:JTG 3430—2020[S].Beijing:China Communications Press,2020.
[24]膨胀土地区建筑技术规范:GB 50112—2013[S].北京:中国建筑工业出版社,2013.
Technical Code for Building in Expansive Soil Regions:GB 50112—2013[S].Beijing:China Architecture & Building Press,2013.
[25]王家文,李仰军.MATLAB 7.0图形图像处理[M].北京:国防工业出版社,2006.
WANG Jia-wen,LI Yang-jun.MATLAB 7.0 Graph and Image Processing[M].Beijing:National Defense Industry Press,2006.

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备注/Memo

备注/Memo:
收稿日期:2021-07-02
基金项目:河南省高等学校重点科研项目(18A580002); 开封市科技发展计划项目(1801004); 甘肃省交通运输厅科研项目(2013-07)
作者简介:王 欢(1982-),男,河北唐县人,讲师,工学博士,E-mail:happy_king0924@sina.com。
更新日期/Last Update: 2022-09-30