土工袋参数对土质边坡加固效果及特性的试验研究
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摘要
随着土工袋加固边坡技术应用愈来愈广,土工袋粗放式布置的弊端逐渐凸显,其优化应用研究势在必行。通过室内物理缩尺模型试验,进行不同土工袋尺寸大小及袋子形式的7种边坡加载破坏试验。通过分析边坡坡体破坏形态与破坏压力、墙后土压力的竖向分布及沿水平方向的传递规律和加载过程中土压力变化趋势等,探究土工袋墙体加固宽度(简称袋宽)、尾翼长度(简称筋长)等参数对土质边坡加固效果的影响及其规律。研究结果表明:土工袋有良好的边坡加固效果,土工袋墙体加固宽度越大加固效果越好;在保证经济成本不变的情况下,并不是筋长越长越好。
With the widespread application of the new slope reinforcement method using soilbags,the drawbacks of extensive layout of soilbags have been gradually revealed. Therefore,it is imperative to research on the optimized application of soilbags. The pressure failure tests in seven cases changing the parameters of soilbags,including the size and form were carried out through the laboratory physical scale model test. In order to explore the reinforcement effect and its law of the width and tail length of soilbags on soil slope,the failure mode and failure pressure of each slope specimen,the vertical distribution law and horizontal transfer rule of earth pressure and the change trend of earth pressure with increasing load have been analyzed. The experimental results indicate that soilbags are effective in reinforcing soil slopes. The larger the reinforcement width of the soilbag is,the better the effect is. However,the longer tail length is not better in the case that the economic cost is constant.
With the widespread application of the new slope reinforcement method using soilbags,the drawbacks of extensive layout of soilbags have been gradually revealed. Therefore,it is imperative to research on the optimized application of soilbags. The pressure failure tests in seven cases changing the parameters of soilbags,including the size and form were carried out through the laboratory physical scale model test. In order to explore the reinforcement effect and its law of the width and tail length of soilbags on soil slope,the failure mode and failure pressure of each slope specimen,the vertical distribution law and horizontal transfer rule of earth pressure and the change trend of earth pressure with increasing load have been analyzed. The experimental results indicate that soilbags are effective in reinforcing soil slopes. The larger the reinforcement width of the soilbag is,the better the effect is. However,the longer tail length is not better in the case that the economic cost is constant.
引文
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[14]WANG L J,LIU S H,ZHOU B.Experimental study on the inclusion of soilbags in retaining walls constructed in expansive soils[J].Geotextiles and Geomembranes,2015,43(1):89-96.
[15]刘斯宏,薛向华,樊科伟,等.土工袋柔性挡墙位移模式及土压力研究[J].岩土工程学报,2014,36(12):2267-2273.(LIU Sihong,XUE Xianghua,FAN Kewei,et al.Study on the earth pressure and deformation mode of a retaining wall constructed with soilbags[J].Chinese Journal of Geotechnical Engineering,2014,36(12):2 267-2 273.(in Chinese))
[16]CHENG H,YAMAMOTO H,THOENI K.Numerical study on stress states and fabric anisotropies in soilbags using the DEM[J].Computers and Geotechnics,2016,76:170-183.
[2]陶志刚,张海江,彭岩岩,等.滑坡监测多源系统云服务平台架构及工程应用[J].岩石力学与工程学报,2017,36(7):1 649-1 658.(TAO Zhigang,ZHANG Haijiang,PENG Yanyan,et al.Frame structure and engineering applications of multi-source system cloud service platform for landslide monitoring[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(7):1 649-1 658.(in Chinese))
[3]栾茂田,李敬峰,肖成志,等.土工格栅加筋挡土墙工作性能的非线性有限元数值分析[J].岩石力学与工程学报,2005,24(14):2 428-2 433.(LUAN Maotian,LI Jingfeng,XIAO Chengzhi,et al.Numerical analysis of performance of geogrids reinforced retaining walls by nonlinear FEM[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2 428-2 433.(in Chinese))
[4]邵龙潭,刘士乙,李红军.基于有限元滑面应力法的重力式挡土墙结构抗滑稳定分析[J].水利学报,2011,42(5):602-608.(SHAOLongtan,LIU Shiyi,LI Hongjun.Analysis of stability against sliding for gravity retaining wall structure based on finite element slip surface stress method[J].Journal of Hydraulic Engineering,2011,42(5):602-608.(in Chinese))
[5]吴顺川,高永涛,王金安.失稳加筋土挡墙加固方案及技术评价[J].岩石力学与工程学报,2007,26(增1):3 086-3 091.(WUShunchuan,GAO Yongtao,WANG Jin′an.Reinforcement scheme of failure reinforced earth retaining wall and its technical assessment[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):3 086-3 091.(in Chinese))
[6]MATSUOKA H,LIU S H.New earth reinforcement method by geotextile bag(“Donow”)[J].Soils and Foundations,2003,43(6):173-188.
[7]刘斯宏,汪易森.土工袋加固地基原理及其工程应用[J].岩土工程技术,2007,21(5):221-225.(LIU Sihong,WANG Yisen.Reinforcement mechanism of soilbags and its applications[J].Geotechnical Engineering Technique,2007,21(5):221-225.(in Chinese))
[8]刘斯宏,汪易森.土工袋技术及其应用前景[J].水利学报,2007,38(增1):644-648.(LIU Sihong,WANG Yisen.Reinforcement mechanism of soilbags and its applications[J].Journal of Hydraulic Engineering,2007,38(Supp.1):644-648.(in Chinese))
[9]刘斯宏,高军军,王子健,等.土工袋技术在市政沟槽回填中的应用研究[J].岩土力学,2014,35(3):765-771.(LIU Sihong,GAOJunjun,WANG Zijian,et al.Application of geotextile bag to urban trench backfill[J].Rock and Soil Mechanics,2014,35(3):765-771.(in Chinese))
[10]王艳巧,王丽娟.土工袋减振与耗能的数值模拟[J].岩土力学,2014,35(2):601-606.(WANG Yanqiao,WANG Lijuan.Numerical simulation of vibration reduction and energy dissipation of soilbags[J].Rock and Soil Mechanics,2014,35(2):601-606.(in Chinese))
[11]LIU S H,JIA F,SHEN C M,et al.Strength characteristics of soilbags under inclined loads[J].Geotextiles and Geomembranes,2018,46(1):1-10.
[12]白福青,刘斯宏,王艳巧.土工袋加固原理与极限强度的分析研究[J].岩土力学,2010,31(增1):172-176.(BAI Fuqing,LIU Sihong,WANG Yanqiao.Research on reinforcement mechanism and failure strength of soilbags[J].Rock and Soil Mechanics,2010,31(Supp.1):172-176.(in Chinese))
[13]王淼.土工砂袋变形与受力特性研究[硕士学位论文][D].杭州:浙江大学,2013.(WANG Miao.Study on deformation and mechanical properties of geotextile tube[M.S.Thesis][D].Hangzhou:Zhejiang University,2013.(in Chinese))
[14]WANG L J,LIU S H,ZHOU B.Experimental study on the inclusion of soilbags in retaining walls constructed in expansive soils[J].Geotextiles and Geomembranes,2015,43(1):89-96.
[15]刘斯宏,薛向华,樊科伟,等.土工袋柔性挡墙位移模式及土压力研究[J].岩土工程学报,2014,36(12):2267-2273.(LIU Sihong,XUE Xianghua,FAN Kewei,et al.Study on the earth pressure and deformation mode of a retaining wall constructed with soilbags[J].Chinese Journal of Geotechnical Engineering,2014,36(12):2 267-2 273.(in Chinese))
[16]CHENG H,YAMAMOTO H,THOENI K.Numerical study on stress states and fabric anisotropies in soilbags using the DEM[J].Computers and Geotechnics,2016,76:170-183.