Model Test on Geotextile Retaining Wall Using Construction Waste
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摘要: 建渣土工袋挡土墙是一种新型的柔性支挡结构,将建渣用作土工袋填料,有利于建渣的回收利用.设计并开展了建渣土工袋挡土墙室内模型试验,研究了不同工况下坡顶竖向沉降的变化规律、墙后土压力和墙面水平位移沿墙高的分布特征以及坡体破坏模式.研究结果表明:增加建渣土工袋挡土墙后的坡顶破坏荷载比无支护时提高了87.5%~125%,边坡支护效果十分显著;坡比从1:0.75增加到1:0.25时,坡顶承受的破坏荷载降低了11.8%~29.4%;建渣土工袋挡土墙墙面水平位移随墙高呈鼓型分布,最大水平位移位于距墙底约1/3~1/2高处.建渣土工袋挡土墙墙后土压力为非线性分布,最大土压力值出现在距墙底约1/3高处;建渣土工袋挡土墙墙后土体的滑裂面从圆弧形向折线形变化,滑裂面前缘高度均位于距墙底1/3~1/2高处;距墙底约1/3~1/2高处为建渣土工袋挡土墙的薄弱部位,在设计和施工中应考虑一定的工程措施予以加强.Abstract: As a new type of flexible retaining structures, the geotextile retaining wall built with construction waste uses construction waste and slag as the filler of geotextile bags, which is beneficial to construction recycling. In this work, indoor model tests for geotextile retaining wall was designed and conducted to investigate the settlement change law of slope top, soil pressure distribution behind walls, horizontal displacement distribution along the height of the walls under different conditions. It is found that compared with the slope without reinforcement, the ultimate loading of the slope top reinforced with geotextile retaining wall is improved by 87.5% -125%, demonstrating the effect of slope support is remarkable; when the slope ratio is increased from 1:0.75 to 1:0.25, the ultimate loading of the strengthened slope top is reduced by 11.8%-29.4%. The horizontal displacement appears a drum-shaped distribution along wall height, and the maximum value is found at approximately 1/3-1/2 of wall height. The soil pressure behind the wall shows nonlinear distribution, and the maximum value appears at 1/3 of wall height. The soil sliding surface behind the retaining wall changes from arc-shape to polygon-shape and the sliding surface height from the front edge of the slope to bottom almost locates at the 1/3-1/2 of wall height. The section of 1/3-1/2 wall height is the weak point of the retaining wall, which should be strengthened with certain measures.
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中华人民共和国住房和城乡建设部. 城市建筑垃圾管理规定[Z]. 2005-06-01. 黄金荣,黄健,徐永福. 新型路堤填筑技术[M]. 上海:上海交通大学出版社,2010:18-19. 江炳茂,孙鹏,余竞. 袋装砂斜坡堤结构设计在超深淤泥软基工程中的应用[J]. 水运工程,2009(10):161-164. JIANG Binmao, SUN Peng, YU Jin. Application of sand-bagged sloping dike structural design in ultra-deep silt foundation engineering[J]. Port Waterway Engineering, 2009(10):161-164. 孙见松. 一种袋装碎石重力式挡土墙的设计理论与应用研究[D]. 湘潭:湘潭大学,2011. MATSUOKA H, LIU Sihong. A new earth reinforcement method using soilbags[M]. London:A Balkema Publishers-Taylor Francis, 2005:1665-1670. RESTAL S J, JACKSON L A, HEERTEN G. Case studies showing the growth and development of geotextile sand containers:an Australian perspective[J]. Geotextiles and Geomembranes, 2002, 20(5):321-342. LI Guangxin, CHEN Yunmin, TANG Xiaowu. Geosynthetics in civil and environmental engineering[M]. Hangzhou:Zhejiang University Press Springer, 2008:7-14. 刘斯宏,白福青,汪易森. 膨胀土土工袋浸水变形及强度特性试验研究[J]. 南水北调与水利科技,2009,7(6):54-58. LIU Sihong, BAI Fuqing, WANG Yishen. Experimental study on wetting induced deformation andstrength characteristics of soilbag filled with expansive soil[J]. South to North Water Transfers and Water Science Technology, 2009, 7(6):54-58. 刘斯宏,王柳江,李卓. 土工袋加固软土地基现场荷载试验的数值模拟[J]. 水利水电科技进展,2012,32(1):78-82. LIU Sihong, WANG Liujiang, LI Zhuo. Numerical simulation of in-situ loading tests on a soilbag-reinforced soft foundation[J]. Advances in Science and Technology of Water Resources, 2012, 32(1):78-82. 刘斯宏,汪易森. 岩土新技术在南水北调工程中的应用研究[J]. 水利水电技术,2009,40(8):61-66. LIU Sihong, WANG Yisen. Application of new technologies to south-to-north water diversion project[J]. Water Resources and Hydropower Engineering, 2009, 40(8):61-66. 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. Earth pressure and deformation mode of a retaining wallconstructed with soilbags[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(12):2267-2273. 薛向华,刘斯宏,樊科伟,等. 土工袋柔性挡土墙模型试验研究[J]. 南水北调与水利科技,2014,12(3):81-84. XUE Xianghua, LIU Sihong, FAN Kewei et al. Model test on retaining wall constructed with soilbag[J]. South to North Water Transfers and Water Science Technology, 2014, 12(3):81-84. 戴文峰,马石城,张勋武. 袋装水泥土(块)挡土墙的变形试验研究及理论分析[J]. 建筑砌块与砌块建筑,2007(5):31-33. DAI Wenfeng, MA Shicheng, ZHANG Xunwu. Deformation test study and theoretical analysis of retaining wall with sacked cement-soil (block)[J]. Building Block and Block Building, 2007(5):31-33. 左珅,刘维正,张瑞坤,等. 路堤荷载下刚柔长短桩复合地基承载特性研究[J]. 西南交通大学学报,2014,49(3):379-385. ZUO Shen, LIU Weizheng, ZHANG Ruikun, et al. Bearing behaviour of composite foundation with rigid-flexible and long-short piles under embankment load[J]. Journal of Southwest Jiaotong Universicy, 2014, 49(3):379-385. 张菊连,沈明荣,梁志荣. 不规则结构面剪切特性试验研究[J]. 西南交通大学学报,2015, 50(6):993-1000. ZHANG Julian, SHEN Mingrong, LIANG Zhirong. Experimental study on shear strength characteristics of irregular rock mass discontinuities[J]. Journal of Southwest Jiaotong Universicy, 2015, 50(6):993-1000. 马石城,张勋武,李锋. 袋装水泥土材料的力学性能试验研究[J]. 湘潭大学自然科学学报,2007,29(3):97-102. MA Shicheng, ZHANG Xunwu, LI Feng. Experimental study of mechanical properties of sacked cemented-soil[J]. Natural Science Journal of Xiangtan University, 2007, 29(3):97-102. 刘斯宏,汪易森. 土工袋技术及其应用前景[J]. 水利学报,2007,38(增刊):644-648. LIU Sihong, WANG Yishen. Reinforcement mechanism of soilbags and its applications[J]. Journal of Hydraulic Engineering, 2007, 38(Sup.):644-648. 肖建庄,郑世同,王静. 再生混凝土长龄期强度与收缩徐变性能[J]. 建筑科学与工程学报,2015(1):21-26. XIAO Jianzhuang, ZHENG Shitong, WANG Jing. Long-term strength, shrinkage and creep properties of recycled aggregate concrete[J]. Journal of Architecture and Civil Engineering, 2015(1):21-26. 贾胜伟,李晓文,刘超. 再生混凝土框架中间节点延性及耗能分析[J]. 新型建筑材料,2010(8):7-10. JIA Shengwei, Li Xiaowen, LIU Chao. Analysis of the ductility and energy dissipation of the recycled concrete frame joints[J]. New Building Materials, 2010(8):7-10. 李茂红,张雨杰,陈航,等. 粉煤灰矿渣掺量对劣级配砂配制混凝土性能的影响[J]. 西南交通大学学报,2015,50(2):342-346,353. LI Maohong, ZHANG Yujie, CHEN Hang, et al. Effect of dosage of fly ash and blast furnace slag on performance of concrete prepared with poorly graded sand[J]. Journal of Southwest Jiaotong Universicy, 2015, 50(2):342-346,353. 伍超. 公路路面再生骨料混凝土试验研究[D]. 成都:西南交通大学,2005. 刘志华. 再生混凝土粗骨料在道路中的研究[D]. 广州:广东工业大学,2014. 李德寅,王邦楣,林亚超. 结构模型实验[M]. 北京:科学出版社,1996:3-4. 卢成原,孟凡丽,王龙. 模型支盘桩的试验研究[J]. 岩土力学,2004,25(11):1803-1809. LU Chengyuan, MENG Fanli, WANG Long. Test study of model piles with branches and pates[J]. Rock and Soil Mechanics, 2004, 25(11):1803-1809. 中华人民共和国行业标准. SL237-1999土工试验规程[S]. 北京:中国水利水电出版社,1999. 李广信,张丙印,于玉贞. 土力学[M]. 北京:清华大学出版社,2013:217-252.
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