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为研究悬臂式挡土墙的承载机制和破坏模式，基于离散元方法，在文献中模型试验的基础上建立了悬臂式挡土墙数值模型。通过对比悬臂式挡土墙的颗粒位移场与颗粒旋转场，验证了数值模型的合理性。分析了悬臂式挡土墙的承载能力曲线以及颗粒位移云图和力链分布图等可视化结果，对挡土墙的破坏模式和荷载传递路径进行了研究；研究了地基土压实度对挡土墙的承载性能和变形特征的影响。结果表明，荷载经由墙后填土传递至水平底板，应力在墙趾处集中并向着斜下方传递和扩散；悬臂式挡土墙的破坏模式以水平滑移和倾覆为主；提高地基土压实度，挡土墙的承载能力得到明显提升，但在破坏阶段，建立在高压实度地基土上的挡土墙的倾覆破坏特征反而更为明显。可视化结果可以为研究者深入理解悬臂式挡土墙承载机制和变形行为提供帮助。
Abstract：In order to study the bearing mechanism and damage mode of cantilevered retaining wall, this paper establishes a numerical model of cantilevered retaining wall based on the discrete element method and on the basis of the model test in the literature. The rationality of the numerical model is verified by comparing the particle displacement field and particle rotation field of the cantilever retaining wall. The bearing capacity curves of the cantilever retaining wall and the visualization results such as particle displacement cloud and force chain distribution diagram were analyzed, and the damage modes and load transfer paths of the retaining wall were investigated. The effects of foundation soil compaction on the bearing performance and deformation characteristics of the retaining wall were studied. The results show that: the load is transferred to the horizontal base plate by the fill behind the wall, and the stress is concentrated at the toe of the wall and spreads downward; the damage modes of cantilevered retaining walls are dominated by horizontal sliding and overturning; the bearing capacity of the retaining wall is obviously improved by increasing the compaction degree of the foundation soil, but in the destructive stage, the overturning damage characteristics of the retaining wall built on the high-compaction foundation soil is rather more obvious. The visualization results can help researchers to deeply understand the bearing mechanism and deformation behavior of cantilever retaining walls.
[1]樊科伟,邹维列,王柳江,等.土工合成材料缓冲层减压膨胀土挡土墙侧向压力的实用预测方法研究[J].岩土力学, 2023, 44(11):3182-3190.
[2]Zhuang Haiyang, Yang Fan, Pan Chen, et al. Seismic performances of the wrapped retaining wall backfilled with polypropylene fiber reinforced rubber-sand mixture[J].Geotextiles and Geomembranes, 2024, 52(4):542-553.
[3]芮瑞,蒋旺,徐杨青,等.刚性挡土墙位移模式对土压力的影响试验研究[J].岩石力学与工程学报, 2023, 42(6):1534-1545.
[4]谷淡平,凌同华.悬臂式型钢水泥土搅拌墙的水泥土承载比和墙顶位移分析[J].岩土力学, 2019, 40(5):1957-1965.
[5]Lu Liang, Chen Bo, Liu Peng, et al. Seismic time-history analysis of block-faced reinforced-soil retaining wall based on pseudo-dynamic method[J]. Geotextiles and Geomembranes, 2024, 52(4):494-510.
[6]魏明,罗强,蒋良潍,等.悬臂式加筋土复合支挡结构振动台模型试验研究[J].岩石力学与工程学报,2021,40(3):607-618.
[7]靳静,张森,李智广,等.筋材布设方式对加筋土挡土墙动力响应的影响[J].河北科技大学学报, 2024, 45(1):82-90.
[8]Moghaddas Tafreshi S N, Kheiri S, Azizian M, et al.Geocell-reinforced bed under static and cyclic loads:soil density and grain size effects[J]. Geosynthetics International,2024, 31(2):126-139.
[9]牛笑笛,杨广庆,王贺,等.不同面板形式加筋土挡土墙结构特性现场试验研究[J].岩土力学, 2021, 42(1):245-254.
[10]何江,肖世国.多级拼装悬臂式挡土墙地震永久位移计算方法[J].岩土力学, 2021, 42(7):1971-1982.
[11]Iraji A, Osouli A. Liquefaction numerical analysis of cantilevered retaining walls with saturated backfill containing fines content[J]. Acta Geotechnica, 2024, 19(7):4457-4483.
[12]高洪梅,卜春尧,王志华,等.回填EPS混合土的防滑悬臂式挡土墙地震稳定性分析[J].岩土工程学报, 2017, 39(12):2278-2286.
[13]Que Yun, Gui Xuefeng, Chen Fuquan. Active earth pressure against cantilever retaining walls with a long relief shelf in rotation about the top[J]. Journal of Civil Engineering, 2023, 27(6):2463-2476.
[14]Que Yun, Gui Xuefeng, Chen Fuquan. Active earth pressure against cantilever retaining walls with the long relief shelf rotating about the bottom[J]. International Journal of Geomechanics, 2022, 22(10):06022026.
[15]Kamiloğlu H A, Sadoğlu E. Experimental and theoretical investigation of short-and long-heel cases of cantilever retaining walls in active state[J]. International Journal of Geomechanics, 2019, 19(5):04019023.
[16]Cakir T. Backfill and subsoil interaction effects on seismic behavior of a cantilever wall[J]. Geomechanics and Engineering, 2014, 6(2):117-138.
[17]Jiang Yan, Han Jie, Parsons R L. Numerical evaluation of secondary reinforcement effect on geosynthetic-reinforced retaining walls[J]. Geotextiles and Geomembranes, 2020,48(1):98-109.
[18]Javdanian H, Goudarzi N. Seismic analysis of geogridreinforced soil retaining walls under decomposed earthquake records[J]. Iranian Journal of Science and Technology,Transactions of Civil Engineering, 2023, 47(4):2365-2377.
[19]Irani N, Salimi M, Golestaneh P, et al. Deep learningbased analysis of true triaxial DEM simulations:role of fabric and particle aspect ratio[J]. Computers and Geotechnics, 2024, 173:106529.
[20]Zhang Shixun, Liu Feiyu, Ying Mengjie, et al. Experimental and DEM analysis for the shear characteristics of interface between sand and irregular concrete under dynamic normal loading[J]. Computers and Geotechnics, 2024, 173:106514.
[21]Derksen J, Martin Z, Detert O, et al. Analysis of bearing capacity of reinforced retaining structures[C]//The 11th International Conference on Geosynthetics. Seoul:[s.n.],2018:16-21.
[22]Han Fei, Ganju E S, Salgado R, et al. Effects of interface roughness, particle geometry, and gradation on the sandsteel interface friction angle[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2018, 144(12):04018096.
[23]Cho N, Martin C D, Sego D C. A clumped particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2007, 44(7):997-1010.
[24]Wang Zhijie, Jacobs F, Ziegler M. Experimental and DEM investigation of geogrid-soil interaction under pullout loads[J]. Geotextiles and Geomembranes, 2016,44(3):230-246.
基本信息:
DOI：10.20203/j.cnki.2095-8919.2026.04.002
中图分类号:TU476.4
引用信息:
[1]毛帅东,王志杰.基于离散元的悬臂式挡土墙承载特性与渐进破坏模式研究[J].吉林建筑大学学报,2026,43(04):9-17.DOI:10.20203/j.cnki.2095-8919.2026.04.002.
基金信息:
国家自然科学基金项目(51709175); 石家庄铁道大学硕士研究生创新项目(YC2023047)
2026-08-15
2026-08-15