台阶式短加筋土挡墙行为特征的离心模型试验

罗玉珊; 徐超; 陈洪帅

doi:10.3969/j.issn.0258-2724.2016.06.016

台阶式短加筋土挡墙行为特征的离心模型试验

doi: 10.3969/j.issn.0258-2724.2016.06.016

罗玉珊^1,2,
徐超^1,3,
陈洪帅⁴

基金项目:

湖北省交通科学研究资助项目（2011-700-3-42）

详细信息

作者简介:
罗玉珊(1987-),女,博士,研究方向为土工合成材料、地基加固和基坑工程,E-mail:shaluoyushan@126.com

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- 文章访问数: 412
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出版历程
- 收稿日期: 2015-06-24
- 刊出日期: 2016-12-25

Centrifuge Modeling Tests on Behavior of Tiered Shored Mechanically Stabilized Earth Walls

摘要

摘要: 短加筋土挡墙是一种在既有稳定墙体/陡坡前修建的窄加筋土挡墙，目前对其工作机理的研究尚不深入，特别是对短加筋土挡墙内部存在陡坎及增设台阶的情况鲜有研究.本文利用离心模型试验，结合系统的监测数据，对各组模型试验墙顶沉降、墙面水平位移、土压力分布等规律进行了分析，探讨了短加筋土挡墙的行为特征以及中部增设台阶的影响.研究发现：短加筋土挡墙的竖向沉降和水平位移均较常规加筋土挡墙分布偏不均匀；短加筋土挡墙与其后稳定墙体/陡坡接触区域竖向土压力分布存在明显应力集中和应力消散区；中部增设台阶可很好地控制短加筋土挡墙变形，提高整体稳定性；短加筋土挡墙和其后稳定墙体/陡坡之间的压力监测值远小于理论水平土压力值，二者间仅为接触压力.
- 土工合成材料 /
- 短加筋土挡墙 /
- 离心模型试验 /
- 行为特征
Abstract: The shored mechanically stabilized earth (SMSE) wall system is kind of narrow MSE walls designed and constructed next to the existing stable walls/slopes. However there are lack of in-depth investigations on the mechanism of SMSE walls, especially on the effects of inside terrace and additional offset between adjacent tiers on SMSE wall system. Utilizing the centrifuge modeling tests of SMSE walls, the measured data including crest settlement, lateral displacement of the facing and the earth pressure in the SMSE walls were analyzed. The results indicate that,compared with conventional MSE walls, SMSE walls have more uneven deformation both on crest settlement and on lateral displacement than conventional MSE walls, and around the inside terrace, unusual stress concentration and dissipation were observed. Adding offset between adjacent layers is an efficient measure to help control the deformation and improve the stability of SMSE wall system. The measured lateral pressure of narrow reinforced soil mass against the stable wall/slope is far below the theoretical active earth pressure, indicating that the stable wall/slope does not add extra lateral pressure to SMSE wall.
- geosynthetics /
- shored mechanically stabilized earth(SMSE) walls /
- centrifuge modeling /
- behavior

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参考文献(17)

罗志刚,王随原,曾俊. 加筋土技术及加筋路基研究现状[J]. 公路交通科技,2011(1):1-4. LUO Zhigang, WANG Suiyuan, ZENG Jun. Situations of researches on reinforced soil techniques and roadbeds[J]. Technology of Highway and Transport, 2011(1):1-4.

MORRISON K, HARRISON F, JANSSEN C, et al. FHWA-CFL/TD-06-001 Shored mechanically stabilized earth (SMSE) wall systems design guidelines[S]. Washington, D.C.:Federal Highway Administration, 2006.

YANG K H, ZORNBERG J G, HUNG W Y, et al. Location of failure plane and design considerations for narrow geosynthetic reinforced soil wall systems[J]. Journal of GeoEngineering, 2011, 6(1):27-40.

YANG K H, LIU C N. Finite element analysis of earth pressures for narrow retaining wall[J]. Journal of GeoEngineering. Taiwan Geotechnical Society, 2007, 2(2):43-52.

YANG K H, KNISS K K, ZORNBERG J G, et al. Finite element analyses for centrifuge modeling of narrow MSE walls[C]//First Pan American Geosynthetics Conference. Mexico:, 2008:1246-1255.

WOODRUFF R. Centrifuge modeling for MSE-shoring composite walls[D]. Colorado:university of Colorado, 2003.

LEE Y B, KO H Y, MCCARTNEY J S. Deformation response of shored MSE walls under surcharge loading in the centrifuge[J]. Geosynthetics Internaitonal, 2010, 17(6):389-402.

LAWSON C R, YEE T W. Reinforced soil retaining walls with constrained reinforced fill zones[J]. Geo-frontiers Congress, 2005(166):1-4.

LESHCHINSKY D, HU Y, HAN J. Limited reinforced space in segmental retaining wall[J]. Geotextiles and Geomembranes, 2004, 22(6):543-553.

SPERL M. Experiments on corn pressure in silo cells translation and comment of Janssen's paper from 1895[J]. Granular Matter, 2006, 8:59-65.

XU C, LUO Y S, ZHU H, et al. Performance of high geosynthetic-reinforced embankments[J]. Geotechnical Special Publication, 2013:515-518.

董健,张明,罗玉珊,等. 山区复杂地形条件下超高土工格栅加筋土路堤的稳定性分析[J]. 长江科学院院报,2014,31(3):134-138,146. DONG Jian, ZHANG Ming, LUO Yushan, et al. High geogrid reinforced embankments employed in mountainous area with complicated terrain[J]. Journal of Yangtze River Scientific Research Institute, 2014, 31(3):134-138, 146.

LESHCHINSKY D, HAN J. Geosynthetic reinforced multitiered walls[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(12):1225-1235.

周世良,何光春,汪承志,等. 台阶式加筋土挡墙模型试验研究[J]. 岩土工程学报,2007,29(1):152-156. ZHOU Shiliang, HE Guangchun, WANG Chengzhi, et al. Study on stepped reinforced soil retaining walls by model tests[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(1):152-156.

杨广庆,吕鹂,庞巍,等. 返包式土工格栅加筋土高挡墙现场试验研究[J]. 岩土力学,2008,29(2):517-522. YANG Guangqing, LV Li, PANG Wei, et al. Research on geogrid reinforced soil retaining wall with wrapped face by in-situ tests[J]. Rock and Soil Mechanics, 2008, 29(2):517-522.

柳军修,陈建峰. 刚/柔性组合墙面加筋土挡墙受力机制分析[J]. 西南交通大学学报,2015,50(6):984-992. LIU Junxiu, CHEN Jianfeng. Mechanical performance analysis of reinforced soil walls with flexible/rigid facings[J]. Journal of Southwest Jiaotong University, 2015, 50(6):984-992.

中华人民共和国国家标准. GB/T17689-2008土工合成材料塑料土工格栅标准[S]. 北京:中国标准出版社,2008.

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文章访问数: 412
HTML全文浏览量: 58
PDF下载量: 197
被引次数: 0

台阶式短加筋土挡墙行为特征的离心模型试验

doi: 10.3969/j.issn.0258-2724.2016.06.016

作者简介: 罗玉珊(1987-),女,博士,研究方向为土工合成材料、地基加固和基坑工程,E-mail:shaluoyushan@126.com

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Centrifuge Modeling Tests on Behavior of Tiered Shored Mechanically Stabilized Earth Walls

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作者简介:
罗玉珊(1987-),女,博士,研究方向为土工合成材料、地基加固和基坑工程,E-mail:shaluoyushan@126.com