半盖挖法偏压基坑中立柱受力与变形特征

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英文篇名：Mechanical and deformation characteristics of erect column piles of bias foundation pit excavated by semi-covered method 作者：刘守花 ; 阳军生 ; 鬲浩然 ; 肖育斐 英文作者：LIU Shouhua;YANG Junsheng;GE Haoran;XIAO Yufei;School of Civil Engineering,Central South University;Sinohydro Bureau 8 Co.Ltd.; 关键词：地铁车站 ; 半盖挖法 ; 偏压基坑 ; 中立柱 ; 地形偏压荷载 英文关键词：metro station;;semi-covered method;;bias foundation pit;;erect column piles;;asymmetric loadings 中文刊名：HZLG 英文刊名：Journal of Huazhong University of Science and Technology(Natural Science Edition) 机构：中南大学土木工程学院;中国水利水电第八工程局有限公司; 出版日期：2019-06-17 16:32 出版单位：华中科技大学学报(自然科学版) 年：2019 期：v.47;No.438 基金：国家自然科学基金资助项目(51608539);; 中国博士后科学基金资助项目(2016M592451;2017T100610);; 中国水利水电第八工程局有限公司资助项目(SDBJ-CSDT-2017-001) 语种：中文; 页：HZLG201906016 页数：6 CN：06 ISSN：42-1658/N 分类号：91-96

摘要

以长沙地铁4号线砂子塘站基坑工程为背景,综合采用数值计算、现场实测和理论分析相结合的方法,分析半盖挖法偏压基坑中立柱受力与变形特征.结果表明:半盖挖法偏压基坑中立柱变形和受力不仅受基坑开挖降水和外部荷载影响,地形偏压荷载对中立柱影响也不容忽视.半盖挖法偏压基坑中立柱变形、受力呈现出特殊性:中立柱水平向地形较低侧变形,且沿竖向呈鼓肚型变形模式;中立柱回弹值均不超过开挖深度的0.05%;中立柱轴向承受弯矩和压力共同作用.
        Taking the Shazitang Station of Subway Line 4 that is located in Changsha as the background,a combination of numerical calculation, field measurement and theoretical research was used to study the characteristics of the erect column piles of biased foundation pit excavated by semi-covered method.The deformation and mechanical of the erect column piles are not only affected by excavation unloading,dewatering,exterior loads,but also by asymmetric loadings.Asymmetric loadings make the deformation and mechanical of the erect column piles appear special.Horizontal,the erect column piles are deformed toward the lower side of the pit look like bulging-shaped.The vertical displacement of the erect column piles do not exceed 0.05% of the excavation depth.The erect column piles are subjected to bending moment and pressure simultaneously.

引文

[1]TAN Y,WANG D L.Characteristics of a large-scale deep foundation pit excavated by the central-island technique in Shanghai soft clay[J].Journal of Geotechnical&Geoenvironmental Engineering,2013,139(11):1875-1893.
    [2]LIU G B,JIANG R J,NG CHARLES W W,et al.Deformation characteristics of a 38 m deep excavation in soft clay[J].Canadian Geotechnical Journal,2011,48(12):1817-1828.
    [3]郑刚,张涛,程雪松,等.天津地铁车站基坑立柱回弹的实测统计分析[J].岩土力学,2017,38(S1):387-394.
    [4]任建喜,马霁南,白进龙,等.半幅铺盖法地铁车站基坑中立柱变形规律研究[J].铁道工程学报,2017,34(9):103-108.
    [5]张建新,仲晓梅,张淑朝,等.超深基坑盖挖逆作立柱桩承载变形性状分析[J].岩土工程学报,2008,30(S1):400-403.
    [6]王文灿,仲晓梅,詹学智.软土地区深基坑逆作法施工下立柱的竖向位移分析[J].建筑结构,2010,40(3):49-51.
    [7]TAN Y,LI M W.Measured performance of a 26 m deep top-down excavation in downtown Shanghai[J].Canadian Geotechnical Journal,2011,48(5):704-719.
    [8]石钰锋,阳军生,白伟,等.紧邻铁路偏压基坑围护结构变形与内力测试分析[J].岩石力学与工程学报,2011,30(4):826-833.
    [9]张学民,石钰锋,张自力,等.列车动载作用下偏压基坑围护结构的动力响应分析[J].振动与冲击,2012,31(20):103-109.
    [10]刘波,席培胜,章定文.偏压作用下非等深基坑开挖效应数值分析[J].东南大学学报:自然科学版,2016,46(4):853-859.
    [11]刘波,章定文,席培胜.偏压基坑工程设计、施工与受力变形特性研究进展[J].中国矿业大学学报,2018,47(4):791-804.
    [12]崔高航,刘守花,王兆亮.哈尔滨市某桩锚支护深基坑工程监测[J].建筑结构学报,2016,37(7):144-150.
    [13]章敏,刘军军.阳角型基坑双排桩支护结构的空间特性[J].华中科技大学学报:自然科学版,2015,43(7):12-18.
    [14]李洵.交通荷载作用下埋地管道的力学性状分析[D].杭州:浙江大学图书馆,2004.
    [15]吴意谦,朱彦鹏.考虑侧向变形下抽降潜水引起地面沉降的计算[J].华中科技大学学报:自然科学版,2016,44(4):116-120.