邱松楠,黎晓冬,周鹏展

• 1:国家开放大学
• 2:北京工业大学城市与工程安全减灾省部共建教育部重点实验室
• 3:南京理工大学机械工程学院

摘要(Abstract)：

【目的】渗透过程引起的颗粒流失和基础结构破坏，往往会对涉水工程造成严重后果。为研究高含砂缺级土在遭受渗透破坏前后力学性质的变化，【方法】采用自主研发的土工内部冲蚀应力路径三轴仪，模拟不同应力状态下的渗透破坏过程，利用该装置评价渗透破坏过程的变化情况及土体力学性质响应。【结果】结果显示：在低应力条件下缺级土的涌砂量较大且峰值强度降低显著，在不均匀分布的有效应力作用下缺级土体渗透破坏及力学行为发生显著变化，细颗粒流失使土体力学强度曲线发生畸变，表现出应变硬化和体积剪缩的特性。应力路径对缺级土的应力-应变关系有较大影响，渗透破坏过程使高含砂缺级土与常见砂石土的应力路径归一化结果存在较大差异。【结论】研究成果可为渗透破坏引起的土体力学强度变化分析及水利工程渗透破坏灾害的防控提供参考。

关键词(KeyWords)： 渗透破坏;缺级砂土;应力-应变关系;涌砂量;应力路径;力学性能;水利工程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(52130905);; 国家重点研发计划项目(2018YFC1505001)

作者(Author): 邱松楠,黎晓冬,周鹏展

DOI: 10.13928/j.cnki.wrahe.2024.12.010

参考文献(References)：

• [1] TOMLINSON S S,VAID Y P.Seepage forces and confining pressure effects on piping erosion[J].Canadian Geotechnical Journal,2000,37(1):1-13.
• [2] MOFFAT R.Experiments on the internal stability of widely graded cohesionless soils[D].Vancouver:the University of British Columbia,2005.
• [3] BENDAHMANE M,BUERGER R,RUIZ B R,et al.Adaptive multiresolution schemes with local time stepping for two-dimensional degenerate reaction-diffusion systems[J].Applied Numerical Mathematics,2008,59(7):1668-1692.
• [4] 罗玉龙，吴强，詹美礼，等.渗流-侵蚀-应力耦合管涌试验装置的研制及初步应用[J].岩石力学与工程学报，2013,32(10):2108-2114.LUO Yulong,WU Qiang,ZHAN Meili,et al.Development of seepage-erosion-stress coupling piping test apparatus and its primary application[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(10):2108-2114.
• [5] WANG S,CHEN J,SHENG J,et al.Laboratory investigation of stress state and grain composition affecting internal erosion in soils containing a suspended cut-off wall[J].KSCE Journal of Civil Engineering,2016,20(4):1283-1293.
• [6] JAHANZAIB I,MUBASHIR A.Integrating the role of relative density on assessing internal stability of granular filters using existing geometrical methods[J].Arabian Journal of Geosciences,2019,12(21):1-13.
• [7] KE L,TAKAHASHI A.Strength reduction of cohesionless soil due to internal erosion induced by one-dimensional upward seepage flow[J].Soils and Foundations,2012,52(4):698-711.
• [8] TERZAGHI K.Soil mechanics:A new chapter in engineering science[J].Industrial and Civil Engineering,1936,12:106-141.
• [9] INDRARATNA B,NGUYEN V T,RUJIKIATKAMJORN C.Assessing the potential of internal erosion and suffusion of granular soils[J].Journal of Geotechnical and Geoenvironmental Engineering,2011,137(5):550-554.
• [10] INDRARATNA B,ISRAR J,RUJIKIATKAMJORN C.Geometrical method for evaluating the internal instability of granular filters based on constriction size distribution[J].Journal of Geotechnical and Geoenvironmental Engineering,2015:04015045.
• [11] 梁越，周洋，吕平毓，等.颗粒级配影响滤层系统细颗粒迁移试验研究[J].水利水电技术，2020,51(4):152-158.LIANG Yue,ZHOU Yang,LYU Pingyu,et al.Experimental study on the influence of particle size distribution on fine particle migration in filter systems [J].Water Resources and Hydropower Technology,2020,51 (4):152-158.
• [12] 陈亮，余旺，罗春木，等.基于静态贯入试验法研究无黏性土管涌发生后抗剪强度变化规律[J].河南科学，2020,38(2):99-106.CH Liang,YU Wang,LUO Chunmu,et al.Based on the static penetration test method,the variation law of shear strength of cohesionless soil after piping is studied [J].Henan Science,2020,38(2):99-106.
• [13] 郁佳成，靳疆鹏，吕博格，等.管涌后缺级砂土的压缩固结特性试验研究[J].公路，2021,66(1):31-37.YU Jiacheng,JIN Jiangpeng,LYU Boge,et al.Experimental research compression consolidation characteristics of discontinuous graded sand after piping [J].Highway,2021,66(1):31-37.
• [14] TERZAGHI K.Failuare of dam foundations by piping and means for preventing it (in German)[R].Die Wasserkraft,Special Forchheimer Issue,1922(17):445-449.
• [15] KE L,TAKAHASHI A.Experimental investigations on suffusion characteristics and its mechanical consequences on saturated cohesionless soil[J].Soils and Foundations.2014,54(4):713-30.
• [16] BENDAHMANE F,MAROT D,ALEXIS A.Experimental parametric study of suffusion and backward erosion[J].Journal of Geotechnical and Geoenvironmental Engineering.2008,134(1):57-67.
• [17] MEHDIZADEH A,DISFANI M M,EVANS R,et al.Progressive internal erosion in a gap-graded internally unstable soil:Mechanical and Geometrical Effects[J].International Journal of Geomechanics,2017,18(3):04017160.1-04017160.14.
• [18] 陈亮，张哲，陈成，等.不同细颗粒含量土体管涌三轴试验研究[J].河北工程大学学报(自然科学版),2019,36(2):1-4.CHEN Liang,ZHANG Zhe,CHEN Cheng,et al.Research on piping and triaxial test in soils with different fine particle content[J].Journal of Hebei University of Engineering(Natural Science edition),2019,36(2):1-4.
• [19] CHANG D S,ZHANG L M.A stress-controlled erosion apparatus for studying internal erosion in soils[J].Geotechnical Testing Journal,2011,34(6):579-589.
• [20] LADE P V,DUNCAN J M.Stress-path dependent behavior of cohesionless soil[J].Journal of Geotechnical Engineering Division,1976,102(GT1):42-48.
• [21] 邱金营.应力路径对砂土应力-应变关系的影响[J].岩土工程学报，1995,17(2):75-82.Qiu Jinying.Effect of stress path on stress-strain relationship of sand[J].Chinese Journal of Geotechnical Engineering,1995,17(2):75-82.
• [22] 许成顺，文利明，杜修力，等.不同应力路径条件下的砂土剪切特性试验研究[J].水利学报，2010,41(1):108-112.XU Chengshun,WEN Liming,DU Xiuli,et al.Experimental study on shear properties of sand under different stress paths[J].Journal of Hydraulic Engineering,2010,41(1):108-112.
• [23] 宋小艳，徐红，齐莹，等.水电行业岩土计量标准在国际工程中的应用研究[J].水利发展研究，2019,19(11):55-59.SONG Xiaoyan,XU Hong,QI Ying,et al.Research on the Application of geotechnical measurement standards in international engineering for hydropower industry[J].Water Resources Development Research,2019,19(11):55-59.
• [24] KENNEY T C,LAU D.Internal stability of granular filters[J].Canadian Geotechnical Journal,1985,22(2):420-423.
• [25] American Society of Testing Materials.Standard Test Method for Unconsoildated-Undrained Triaxial Compression Test:ASTM D2850-2007[S].American Society for Testing and Materials (ASTM),West Conshohocken.2007.
• [26] CHANG D.Internal erosion and overtopping erosion of earth dams and landslide dams.[D].Hong Kong:Hong Kong University of Science and Technology,2012.
• [27] Itasca Consulting Group Inc.PFC3D Particle Flow Code in 3 Dimensions-Optional Features[M].USA:Minneapolis,2005:8-9.
• [28] USAMA E S,MOURAD Z.Coupled continuum-discrete model for saturated granular soils[J].Journal of Engineering Mechanics,ASCE,2005,131(4):413-426.
• [29] 孙岳崧，濮家骝，李广信.不同应力路径对砂土应力-应变关系影响[J].岩土工程学报，1987,9(6):78-88.SUN Yuesong,PU Jialiu,LI Guangxin.The effects of different stress paths on stress-strain behavior of sand [J].Chinese Journal of Geotechnical Engineering,1987,9(6):78-88.