蒋明杰,石竣允,栗书亚,胡荣峰,梅国雄

• 1:广西大学工程防灾与结构安全教育部重点实验室
• 2:广西大学广西防灾减灾与工程安全重点实验室
• 3:北京工业大学城市减灾与防灾防护教育部重点实验室

摘要(Abstract)：

【目的】为研究级配对粗粒土-土工格栅界面动力剪切特性的影响规律，【方法】基于连续级配方程，通过改变试样的最大粒径d_(max)和级配面积S,制备了18组不同级配试样，对各组试样分别进行设置土工格栅和不设置土工格栅的循环直剪试验，分析d_(max)和S对界面循环剪切特性的影响，并引入了加筋剪切刚度系数α_K和加筋阻尼比系数α_D,来评价土工格栅对动剪切强度参数的影响效果。【结果】结果显示：当小于格栅网孔尺寸的粗粒含量较高时，剪切刚度K随着d_(max)的增大而增大，阻尼比D随着d_(max)的增大而减小；反之，则表现出相反的趋势。K和D均与d_(max)呈对数函数关系；K和D与S的关系均可用二次多项式表示。此外，给出了α_K和α_D与粒孔比的关系，即随着粒孔比的增大，α_K先增大后减小，α_D呈先减小后增大的规律。当粒孔比取0.073左右时，土工格栅对粗粒土循环剪切特性的加筋效果最好。【结论】结果表明：颗粒与土工格栅间的互锁机制对粗粒土-格栅界面的循环剪切特性有重要影响，当大部分颗粒粒径小于格栅网格尺寸时，颗粒与格栅间的互锁机制充分发挥；当颗粒最大粒径及格栅网格尺寸相同时，存在一个最优级配面积，使得粗粒土-格栅界面的抗震性能最好。

关键词(KeyWords)： 粗粒土;土工格栅;颗粒级配;模型试验;土石坝;变形;抗剪强度;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(1878185,52178321,52108309);; 广东省海洋土木工程重点实验室开放基金(LMCE202103);; 水利部土石坝破坏机理与防控技术重点实验室开放基金(2020ZDK003);; 广西自然科学基金(2021GXNSFBA196091)

作者(Author): 蒋明杰,石竣允,栗书亚,胡荣峰,梅国雄

DOI: 10.13928/j.cnki.wrahe.2024.03.014

参考文献(References)：

• [1] 徐泽平.当代高堆石坝建设的关键技术及岩土工程问题[J].岩土工程学报，2011,33(S1):34-40.XU Zeping.Technologies and geotechnical problems for construction of modern rockfill dams[J].Chinese Journal of Geotechnical Engineering,2011,33(S1):34-40.
• [2] 李红军，迟世春，林皋.高心墙堆石坝坝坡加筋抗震稳定分析[J].岩土工程学报，2007,29(12):1881-1887.LI Hongjun,CHI Shichun,LIN Gao.Aseismic stability analysis for reinforced slopes of high core rock-fill dams[J].Chinese Journal of Geotechnical Engineering,2007,29(12):1881-1887.
• [3] 徐皓.欧标ESCS与国标土壤分类差异性研究[J].铁道勘察，2022,48(4):51-56.XU Hao.Research on difference between European standard ESCS and national standard(Railway standard) based on soil classification[J].Railway Investigation and Surveying,2022,48(4):51-56.
• [4] LOPES P C,LOPES M L,LOPES M P.Shear behaviour of geosynthetics in the inclined plane test-influence of soil particle size and geosynthetic structure[J].Geosynthetics International,2001,8(4):327-342.
• [5] VANGLA P,GALI M L.Effect of particle size of sand and surface asperities of reinforcement on their interface shear behavior[J].Geotextiles and Geomembranes,2015,44(3):254-268.
• [6] SWETA K,HUSSAINI S K K.Effect of shearing rate on the behavior of geogrid-reinforced railroad ballast under direct shear conditions[J].Geotextiles & Geomembranes,2018,46(3):251-256.
• [7] HAN B Y,LING J M,SHU X,et al.Laboratory investigation of particle size effects on the shear behavior of aggregate-geogrid interface[J].Construction and Building Materials,2018,158(15):1015-1025.
• [8] WANG J,LIU F Y,WANG P,et al.Particle size effects on coarse soil-geogrid interface response in cyclic and post-cyclic direct shear tests[J].Geotextiles and Geomembranes,2016,44(6):854-861.
• [9] 刘飞禹，王攀，王军，等.颗粒粒径对格栅-土界面静、动力直剪特性的影响[J].岩土力学，2017,38(1):150-156.DOI:10.16285/j.rsm.2017.01.019.LIU Feiyu,WANG Pan,WANG Jun,et al.Influence of soil particle size on monotonic and cyclic direct shear behaviors of geogrid-soil interface[J].Rock and Soil Mechanics,2017,38(1):150-156.DOI:10.16285/j.rsm.2017.01.019.
• [10] 刘飞禹，胡惠丽，王军，等.粒孔比对筋-土界面循环剪切特性的影响[J].中国公路学报，2019,32(12):115-122.LIU Feiyu,HU Huili,WANG Jun,et al.Influence of aperture ratio on cyclic shear behavior of geogrid-soil interface[J].China Journal of Highway and Transport,2019,32(12):115-122.
• [11] NYE C J,FOX P J.Dynamic shear behavior of a needlepunched geosynthetic clay liner[J].Journal of Geotechnical and Geoenvironmental Engineering,2007,133(8):973-983.
• [12] VIEIRA C S,LOPES M L,CALDEIRA L M.Sand-geotextile interface characterisation through monotonic and cyclic direct shear tests[J].Geosynthetics International,2013,20(1):26-38.
• [13] 李丽华，屠娴哲，刘帅帅，等.土工格栅加筋细粒含量土循环剪切特性分析[J].水利水电技术(中英文),2022,53(9):197-209.DOI:10.13928/j.cnki.wrahe.2022.09.019.LI Lihua,TU Xianzhe,LIU Shuaishuai,et al.Analysis on cyclic shear characteristics of geogrid-reinforced soil with fine grain content[J].Water Resources and Hydropower Engineering,2022,53(9):197-209.DOI:10.13928/j.cnki.wrahe.2022.09.019.
• [14] 王海东，翁芬芬，蔡长丰.含水率与粒径对非饱和砂土动力特性影响的试验研究[J].铁道科学与工程学报，2019,16(2):359-366.DOI:10.19713/j.cnki.43-1423/u.2019.02.011.WANG Haidong,WENG Fenfen,CAI Changfeng.Effects of particle size and moisture content on dynamic characteristics of unsaturated sandy soil[J].Journal of Railway Science and Engineering,2019,16(2):359-366.DOI:10.19713/j.cnki.43-1423/u.2019.02.011.
• [15] 赵雨朦，徐东升，刘华北.土工格栅与砂土相互作用的单剪试验研究[J].岩石力学与工程学报，2018,37(S1):3722-3728.DOI:10.13722/j.cnki.jrme.2016.0687.ZHAO Yumeng,XU Dongsheng,LIU Huabei.Study of interaction behavior between geogrids and sand with simple shear test[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(S1):3722-3728.DOI:10.13722/j.cnki.jrme.2016.0687.
• [16] 唐晓松，郑颖人，王永甫，等.关于土工格栅合理网孔尺寸的研究[J].岩土力学，2017,38(6):1583-1588.DOI:10.16285/j.rsm.2017.06.006.TANG Xiaosong,ZHENG Yingren,WANG Yongfu,et al.Study on the reasonable size of geo-grid meshes[J].Rock and Soil Mechanics,2017,38(6):1583-1588.DOI:10.16285/j.rsm.2017.06.006.
• [17] 陈世豪.P5含量对粗粒土动力特性影响规律试验研究[D].成都：成都理工大学，2020.CHEN Shihao.Experimental study on the effect of P5 content on the dynamic characteristics of coarse grained soil[D].Chengdu:Chengdu University of Technology,Chengdu,2020.
• [18] ZHU J G,GUO W L,WEN Y F,et al.New gradation equation and applicability for particle-size distributions of various soils[J].International Journal of Geomechanics,2018,18(2):04017155.
• [19] 中华人民共和国水利部.土工试验方法标准：GT/T 50123—2019[S].北京：中国计划出版社，2019.Ministry of Water Resources of the PRC.Standard for Soil Test Method:GT/T 50123—2019[S].China Planning Press:Beijing,China,2019.
• [20] 吴二鲁，朱俊高，郭万里，等.缩尺效应对粗粒料压实密度影响的试验研究[J].岩土工程学报，2019,41(9):1767-1772.WU Erlu,ZHU Jungao,GUO Wanli,et al.Experimental study on effect of scaling on compact density of coarse-grained soils[J].Chinese Journal of Geotechnical Engineering,2019,41(9):1767-1772.
• [21] 郭庆国，粗粒土的工程特性及应用[M].郑州：黄河水利出版社，2003.GUO Qingguo.Engineering properties and application of coarse-grained soil[M].Zhengzhou:China Water Power Press,2003.
• [22] 王柳江，刘归华，毛航宇，等.级配对堆石-土工格栅界面剪切特性影响试验研究[J].水利水电技术(中英文),2022,53(5):82-90.WANG Liujiang,LIU Guihua,MAO Hangyu,et al.Experimental study of gradation effect on interfacial shear characteristics between rockfill material and geogrid[J].Water Resources and Hydropower Engineering,2022,53(5):82-90.
• [23] 张哲.西延高铁黄土滑坡发育成因及工程策略研究[J].铁道勘察，2022,48(3):38-44.ZHANG Zhe.Research on development origin and engineering strategy of loess landslide of Xi′an-Yan′an High-speed Railway[J].Railway Investigation and Surveying,2022,48(3):38-44.