全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于耦合计算的土工格栅处治山区路堤细观机理研究

Keywords: 道路工程,土工格栅,耦合分析,加筋路堤,细观参数

Full-Text   Cite this paper   Add to My Lib

Abstract:

?针对新旧路堤的不均匀沉降问题,结合山区高填方加筋工程,开发离散-连续耦合程序,局部加筋区域采用离散元PFC模拟,外围区域采用连续单元FLAC模拟,分析土工格栅在新旧路堤的受力分布,研究加筋区域土体细观参数的变化,揭示土工格栅处治新旧路堤的细观机理。结果表明:离散-连续耦合方法可作为精细化分析的有效手段;在沉降未达到稳定前,细观上加筋层孔隙率逐渐减小,接触数增大,滑动比变化十分剧烈,宏观上土体进一步压密,加筋层中的土工格栅拉力逐渐增大,筋材加筋作用开始显现;在沉降稳定后期,加筋层孔隙率进一步减小,部分区域孔隙率增大发生剪胀,滑动比数值均较小,一般在8%以下,宏观上表现为沉降已完成。

References

[1]  OCHIAI H, OTANI J, HAYASHIC S, et al.The Pull-out Resistance of Geogrids in Reinforced Soil[J].Geotextiles and Geomembranes, 1996, 14(1):19-42.
[2]  BAKEER R M, ABDEL-RAHMAN A H, NAPOLITANO P J.Geotextile Friction Mobilization During Field Pullout Test[J].Geotextiles and Geomembranes, 1998, 16(2):73-85.
[3]  MORACI N, GIOFFRE D.A Simple Method to Evaluate the Pullout Resistance of Extruded Geogrids Embedded in a Compacted Granular Soil[J].Geotextiles and Geomembranes, 2006, 24(2):116-128.
[4]  MORACI N, RECALCATI P.Factors Affecting the Pullout Behaviour of Extruded Geogrids Embedded in a Compacted Granular Soil[J].Geotextiles and Geomembranes, 2006, 24(4):220-242.
[5]  王志斌, 李 亮, 邹金锋, 等.斜坡地基上加筋路堤工作性状及稳定性研究[J].岩土力学, 2008, 29(8):2189-2192. WANG Zhi-bin, LI Liang, ZOU Jin-feng, et al.Study on Performance of Reinforced Embankment on Mountain Slope with Full-scale Model Test[J].Rock and Soil Mechanics, 2008, 29(8):2189-2192.
[6]  杨广庆, 周亦涛, 周乔勇, 等.土工格栅加筋土挡墙试验研究[J].岩土力学, 2009, 30(1):206-210. YANG Guang-qing, ZHOU Yi-tao, ZHOU Qiao-yong, et al.Experimental Research on Geogrid Reinforced Earth Retaining Wall[J].Rock and Soil Mechanics, 2009, 30(1):206-210.
[7]  张 嘎, 张建民, 梁东方.土与结构接触面试验中的土颗粒细观运动测量[J].岩土工程学报, 2005, 27(8):903-907. ZHANG Ga, ZHANG Jian-min, LIANG Dong-fang.Measurement of Soil Particle Movement in Soil-structure Interface Test[J].Chinese Journal of Geotechnical Engineering, 2005, 27(8):903-907.
[8]  李 飞, 周 健, 张 姣.土工合成材料加筋边坡宏细观机理模型试验研究[J].岩土工程学报, 2012, 34(6):1080-1087. LI Fei, ZHOU Jian, ZHANG Jiao.Model Tests on Macro-mesoscopic Mechanism of Geosynthetic-reinforced Slopes[J].Chinese Journal of Geotechnical Engineering, 2012, 34(6):1080-1087.
[9]  ASAF Z, RUBINSTEIN D, SHMULEVICH I.Evaluation of Link-track Performances Using DEM[J].Journal of Terramechanics, 2006, 43(2):141-161.
[10]  BIERAWSKI L G, MAENO S.DEM-FEM Model of Highly Saturated Soil Motion Due to Seepage Force[J].Journal of Waterway, Port, Coastal and Ocean Engineering, 2006, 132(5):401-409.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133