基于FLAC~(3D)的高填方涵洞EPS板减荷效应研究

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英文篇名：Research on Load Reduction Effect of EPS Slab for High Fill Culvert Based on FLAC~(3D) 作者：黄笑犬 ; 张谢东 ; 晓夏 ; 刘建平 ; 张志华 ; 罗吕青 英文作者：HUANG Xiaoquan;ZHANG Xiedong;XIAO Xia;LIU Jianping;ZHANG Zhihua;LUO Lüqing;School of Transportation,Wuhan University of Technology;CCCC First Highway Engineering Co.Ltd.; 关键词：高填方涵洞 ; EPS板 ; 垂直土压力 ; 现场试验 ; FLAC~(3D) 英文关键词：high fill culvert;;EPS slab;;vertical earth pressure;;field test;;FLAC~(3D) 中文刊名：JTKJ 英文刊名：Journal of Wuhan University of Technology(Transportation Science & Engineering) 机构：武汉理工大学交通学院;中交第一公路工程局有限公司; 出版日期：2019-06-15 出版单位：武汉理工大学学报(交通科学与工程版) 年：2019 期：v.43 基金：中交一公局科技项目资助(20180920) 语种：中文; 页：JTKJ201903035 页数：6 CN：03 ISSN：42-1824/U 分类号：180-185

摘要

以喀麦隆雅杜高速公路PK4+212.5段高填方涵洞为工程背景,通过涵顶铺设EPS板进行现场原位测试,对不同填土高度时的涵顶垂直土压力进行实时监测,并采用FLAC~(3D)有限差分软件建立相应的计算模型,对填土进行分层施工模拟,得到了涵顶垂直土压力分布.结果表明,通过涵顶EPS板的变形协调,能够降低涵顶受到的垂直土压力,减荷效果明显.以涵洞某截面为例,通过对比模拟结果和现场实测结果可知两者吻合度较高,在施工中采用EPS板减荷措施可以有效降低涵顶垂直土压力.
        Taking the high fill culvert of Cameroon Yadu Expressway PK4+212.5 section as the engineering background,the vertical earth pressure on the culvert top at different fill heights was monitored in real time by laying EPS board on the culvert top for in-situ testing.The corresponding calculation model was established by FLAC~(3D)finite difference software,and the layered construction simulation of the fill was carried out to obtain the vertical earth pressure distribution on the culvert top.Research results show that the vertical earth pressure on the culvert top can be greatly reduced by coordinating the deformation of EPS slab on the culvert top,and the load reduction effect is obvious.Taking a certain section of culvert as an example,the simulation results are in good agreement with the field measured results.Using EPS slab load reduction measures in construction can effectively reduce the vertical earth pressure on the culvert top.

引文

[1]中华人民共和国交通部.公路涵洞设计细则:JTG/T D65-04—2007)[S].北京:人民交通出版社,2007.
    [2]顾安全,郭婷婷,王兴平.高填土涵洞(管)采用EPS板减荷的试验研究[J].岩土工程学报,2005,27(5):500-504.
    [3]顾安全.上埋式管道及洞室垂直土压力的研究[J].岩土工程学报,1981,3(1):3-15.
    [4]顾安全,吕镇锋,姜峰林,等.高填土盖板涵EPS板减荷试验及设计方法[J].岩土工程学报,2009,31(10):1481-1486.
    [5]杨锡武,张永兴.山区公路高填方涵洞加筋桥减载方法及其设计理论研究[J].岩石力学与工程学报,2005,24(9):1561-1571.
    [6]MEGUID M A.A numerical procedure for the assessment of contact pressures on buried structures overlain by EPS geofoam inclusion[J].International Journal of Geosynthetics &Groun,2017,3(1):23-27.
    [7]SUN L,HOPKINS T,BECKHAM T.Stress reduction by ultra-lightweight geofoam for high fill culvert:numerical analysis[C].The Proceedings of the13th Annual Great Lakes Geotechnical and Geoenvironmental Engineering Conference(GLGGC),Milwaukee,2005.
    [8]刘永胜.基于FLAC3D的高填方路堤通道涵洞受力特性数值分析[J].西部交通科技,2012(12):21-24.
    [9]蔡文霄,梁华,朱彦鹏,等.基于FLAC3D的高填方路基沉降变形因素分析[J].水利与建筑工程学报,2017(6):199-205.
    [10]齐永利,王威.国外高填土框架涵洞:马斯顿效应的分析及处理[J].公路,2008(9):212-215.
    [11]姜峰林.高填方涵洞EPS板减荷技术应用及数值模拟研究[D].西安:长安大学,2010.
    [12]陈育民,徐鼎平.FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2013.
    [13]郑俊杰,赵建斌,陈保国.高路堤下涵洞垂直土压力研究[J].岩土工程学报,2009,31(7):1009-1013.
    [14]张卫兵,刘保健,谢永利.基于EPS减荷措施的高填涵洞试验研究[J].公路交通科技,2006,23(12):54-57.