深基坑中新型双排复合支护结构的三维空间有限元分析
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摘要
将两种或两种以上的支护结构组合成复合支护结构,应用于复杂软土地基深基坑工程已受到许多研究与设计人员的关注,以确保工程的安全、稳定及经济性。针对目前关于将地下连续墙与钻孔灌注桩及高压旋喷桩联合成新型双排复合支护结构的研究较少,本文以某软土深基坑工程为例,设计采用了该新型双排复合支护结构,基于三维弹塑性有限单元法对深基坑工程的分层土体开挖与降水展开数值模拟,通过分析该新型双排复合支护结构的结构性能及深基坑开挖对周围环境的影响,验证设计方案的有效性,为该类型的复合支护结构在深基坑工程中的应用和推广提供有益帮助。
The composite supporting structure which consists of two or more kinds of supporting structures has received much attention from researchers and designers,and has been applied in complex soft-soil deep excavation engineering to ensure the safety,economy,and stability of the engineering.Considering there are few studies on the new-type double-row composite supporting structure which consists of diaphragm wall,bored pile,and high pressure jet grouting pile,we took one soft foundation pit engineering as a case study,and designed the new-type double-row composite supporting structure.Using the three-dimensional elastoplastic finite element method,we conducted numerical simulation of the stratified excavation and precipitation of the engineering.Through the analysis of the structural performance of the new-type double-row composite supporting structure and the influence of excavation on the surrounding environment,we verified the validity of the design.This research can provide help to the application and popularization of the new-type composite supporting structure in deep excavation engineering.
The composite supporting structure which consists of two or more kinds of supporting structures has received much attention from researchers and designers,and has been applied in complex soft-soil deep excavation engineering to ensure the safety,economy,and stability of the engineering.Considering there are few studies on the new-type double-row composite supporting structure which consists of diaphragm wall,bored pile,and high pressure jet grouting pile,we took one soft foundation pit engineering as a case study,and designed the new-type double-row composite supporting structure.Using the three-dimensional elastoplastic finite element method,we conducted numerical simulation of the stratified excavation and precipitation of the engineering.Through the analysis of the structural performance of the new-type double-row composite supporting structure and the influence of excavation on the surrounding environment,we verified the validity of the design.This research can provide help to the application and popularization of the new-type composite supporting structure in deep excavation engineering.
引文
[1]王晓晖.软土深基坑支护结构内力与变形的影响因素分析[D].南京:河海大学,2003.(WANG X H.Analysis of factors on effect of internal force and deformation for retaining structure of deep foundation pit under soft soil[D].Nanjing:Hohai University,2003.(in Chinese))
[2]候永茂.软土地层中格形地下连续墙维护结构性状研究[D].上海:上海交通大学,2010.(HOU Y M.Behavior of cellular diaphragm wall in soft deposit[D].Shanghai:Shanghai Jiao Tong University,2010.(in Chinese))
[3]李佳.基坑开挖位移及土体水平抗力比例系数的反分析[J].南水北调与水利科技,2017,15(2):185-191.(LI J.Back analysis on displacement of supporting structure and proportional coefficient of horizontal resistance during foundation excavation[J].South-to-North Water Transfers and Water Science&Technology,2017,15(2):185-191.(in Chinese))DOI:10.13476/j.c nki.nsbdqk.2017.02.028.
[4]李峰.桩锚土钉复合支护基坑施工时变力学研究[D].郑州:郑州大学,2010.(LI F.The research on construction-time-varying mechanics and its application on pile-anchor and soil-nailing composite supporting deep foundation pit[D].Zhengzhou:Zhengzhou University,2010.(in Chinese))
[5]陈洪凯,梁丹,董平,等.隧道径向锚钉-斜交锚杆复合支护技术研究[J].地下空间与工程学报,2016,12(3):754-760.(CHEN H K,LIANG D,DONG P,et al.Study on tunnel composite supporting technology with short radical anchors&long sloping bolts[J].Chinese Journal of Underground Space and Engineering,2016,12(3):754-760.(in Chinese))
[6]管玉坤.基坑复合支护结构的桩土相互作用与土拱效应研究[D].北京:北京工业大学,2010.(GUAN Y K.Studies on pilesoil interactions and soil arching effect in composite supporting structure of foundation ditch[D].Beijing:Beijing University of Technology,2010.(in Chinese))
[7]林忠伟,王新宇,张振铎.微型护坡桩和土钉墙复合支护结构设计及实践[J].岩土工程技术,2008,22(5):263-266.(LIN Z W,WANG X Y,ZHANG Z D.Combined retaining structure of slope protection micro-pile and soil nailing wall[J].Geotechnical Engineering Technique,2008,22(5):263-266.(in Chinese))
[8]周亮.排桩复合土钉支护结构工作机理及设计方法研究[D].郑州:郑州大学,2014.(ZHOU L.Research on working mechanism and design method of piles in row and composite soil nailing supporting structure[D].Zhengzhou:Zhengzhou University,2014.(in Chinese))
[9]赵利益,蔡伟铭.深基坑开挖三维弹塑性有限元分析[J].上海铁道大学学报,1997,18(4):100-105.(ZHAO L Y,CAI W M.3-dimension elastic-plastic finite element analysis of the deep foundation pit excavation[J].Journal of Shanghai Tiedao University,1997,18(4):100-105.(in Chinese))
[10]时爱祥,邓祥吉,仇建春,等.格形地连墙的三维有限元分析[J].南水北调与水利科技,2015,13(03):571-574.(SHI A X,DENG X J,QIU J C,et al.Three-dimensional finite element analysis of cellular diaphragm wall.[J].South-to-North Water Transfers and Water Science&Technology,2015,13(03):571-574.(in Chinese))
[11]曹明杰,曹鑫,徐政治.泵站基坑开挖中的地下连续墙有限元结构计算[J].南水北调与水利科技,2014,12(6):204-208.(CAO M J,CAO X,XU Z Z.Finite element structural calculation of underground continuous wall in excavation of pump station foundation pit[J].South-to-North Water Transfers and Water Science&Technology,2014,12(6):204-208.(in Chinese))
[12]仇建春,时爱祥,夏友超,等.双排格形地下连续墙的空间变形三维有限元分析[J].水利水电技术.2014,45(8):78-82.(QIU J C,SHI A X,XIA Y C,et al.3-D finite element analysis on spatial deformation of double-row cellular continuous diaphragm wall[J].Water Resources and Hydropower Engineering.2014(08):78-82.(in Chinese))
[13]ARAI Y,KUSAKABE O,MURATA O,et al.A numerical study on ground displacement and stress during and after the installation of deep circular diaphragm walls and soil excavation[J].Computers&Geotechnics,2008,35(5):791-807.DOI:10.1016/j.compgeo.2007.11.001.
[14]CHEN J J,LEI H,WANG J H.Numerical analysis of the installation effect of diaphragm walls in saturated soft clay[J].Acta Geotechnica,2014,9(6):981-991.DOI:10.1007/s11440-013-0284-x.
[15]CARRUBBA P,COLONNA P.A comparison of numerical methods for multi-tied walls[J].Computers&Geotechnics,2000,27(2):117-140.DOI:10.1016/S0266-352X(00)00007-0.
[16]郝峰.高压旋喷桩复合土钉墙Plaxis有限元分析[J].探矿工程(岩土钻掘工程),2009,36(9):52-55.(HAO F.Plaxis finite elements analysis on supporting structure with high-pressure jet grouting pile and composite soil-nailing wall[J].Exploration Engineering(Rock&Soil Drilling&Tunneling),2009,36(9):52-55.(in Chinese))
[17]刘震国.高压旋喷桩止水帷幕在深基坑支护中的应用[J].建筑机械化,2012,33(S1):68-71.(LIU Z G.High pressure chemical churning pile water stop curtain applied in deep foundation pit[J].Construction Mechanization,2012,33(S1):68-71.(in Chinese))
[18]李龙舟.基于ABAQUS软件的覆盖层中塑性混凝土防渗墙的应力变形分析[J].科技创新与应用,2014(2):1-3.(LI L Z.Deformation and stress analysis of plastic concrete cut-off wall in overburden layer with ABAQUS software[J].Technology Innovation and Application,2014(2):1-3.(in Chinese))
[19]朱守鹏.接触算法在桩土结构相互作用中的应用[D].柳州:广西工学院,2012.(ZHU S P.Application of contact algorithm in the pile soil structure interaction[D].Liuzhou:Guangxi University of Technology,2012.(in Chinese))
[20]何良德,苏兴海,徐笛清,等.基于修正剑桥渗流耦合模型的闸室有限元分析[J].中国港湾建设,2013(3):16-21.(HE L D,SU X H,XU D Q,et al.Finite element analysis of chamber walls of ship locks based on modified cam-clay model coupling with biot theory[J].China Harbour Engineering,2013(3):16-21.(in Chinese))
[21]HSIEH P G,OU C Y.Shape of ground surface settlement profiles caused by excavation[J].Canadian Geotechnical Journal,1998,35(6):1004-1017.DOI:10.1139/cgj3561004.
[2]候永茂.软土地层中格形地下连续墙维护结构性状研究[D].上海:上海交通大学,2010.(HOU Y M.Behavior of cellular diaphragm wall in soft deposit[D].Shanghai:Shanghai Jiao Tong University,2010.(in Chinese))
[3]李佳.基坑开挖位移及土体水平抗力比例系数的反分析[J].南水北调与水利科技,2017,15(2):185-191.(LI J.Back analysis on displacement of supporting structure and proportional coefficient of horizontal resistance during foundation excavation[J].South-to-North Water Transfers and Water Science&Technology,2017,15(2):185-191.(in Chinese))DOI:10.13476/j.c nki.nsbdqk.2017.02.028.
[4]李峰.桩锚土钉复合支护基坑施工时变力学研究[D].郑州:郑州大学,2010.(LI F.The research on construction-time-varying mechanics and its application on pile-anchor and soil-nailing composite supporting deep foundation pit[D].Zhengzhou:Zhengzhou University,2010.(in Chinese))
[5]陈洪凯,梁丹,董平,等.隧道径向锚钉-斜交锚杆复合支护技术研究[J].地下空间与工程学报,2016,12(3):754-760.(CHEN H K,LIANG D,DONG P,et al.Study on tunnel composite supporting technology with short radical anchors&long sloping bolts[J].Chinese Journal of Underground Space and Engineering,2016,12(3):754-760.(in Chinese))
[6]管玉坤.基坑复合支护结构的桩土相互作用与土拱效应研究[D].北京:北京工业大学,2010.(GUAN Y K.Studies on pilesoil interactions and soil arching effect in composite supporting structure of foundation ditch[D].Beijing:Beijing University of Technology,2010.(in Chinese))
[7]林忠伟,王新宇,张振铎.微型护坡桩和土钉墙复合支护结构设计及实践[J].岩土工程技术,2008,22(5):263-266.(LIN Z W,WANG X Y,ZHANG Z D.Combined retaining structure of slope protection micro-pile and soil nailing wall[J].Geotechnical Engineering Technique,2008,22(5):263-266.(in Chinese))
[8]周亮.排桩复合土钉支护结构工作机理及设计方法研究[D].郑州:郑州大学,2014.(ZHOU L.Research on working mechanism and design method of piles in row and composite soil nailing supporting structure[D].Zhengzhou:Zhengzhou University,2014.(in Chinese))
[9]赵利益,蔡伟铭.深基坑开挖三维弹塑性有限元分析[J].上海铁道大学学报,1997,18(4):100-105.(ZHAO L Y,CAI W M.3-dimension elastic-plastic finite element analysis of the deep foundation pit excavation[J].Journal of Shanghai Tiedao University,1997,18(4):100-105.(in Chinese))
[10]时爱祥,邓祥吉,仇建春,等.格形地连墙的三维有限元分析[J].南水北调与水利科技,2015,13(03):571-574.(SHI A X,DENG X J,QIU J C,et al.Three-dimensional finite element analysis of cellular diaphragm wall.[J].South-to-North Water Transfers and Water Science&Technology,2015,13(03):571-574.(in Chinese))
[11]曹明杰,曹鑫,徐政治.泵站基坑开挖中的地下连续墙有限元结构计算[J].南水北调与水利科技,2014,12(6):204-208.(CAO M J,CAO X,XU Z Z.Finite element structural calculation of underground continuous wall in excavation of pump station foundation pit[J].South-to-North Water Transfers and Water Science&Technology,2014,12(6):204-208.(in Chinese))
[12]仇建春,时爱祥,夏友超,等.双排格形地下连续墙的空间变形三维有限元分析[J].水利水电技术.2014,45(8):78-82.(QIU J C,SHI A X,XIA Y C,et al.3-D finite element analysis on spatial deformation of double-row cellular continuous diaphragm wall[J].Water Resources and Hydropower Engineering.2014(08):78-82.(in Chinese))
[13]ARAI Y,KUSAKABE O,MURATA O,et al.A numerical study on ground displacement and stress during and after the installation of deep circular diaphragm walls and soil excavation[J].Computers&Geotechnics,2008,35(5):791-807.DOI:10.1016/j.compgeo.2007.11.001.
[14]CHEN J J,LEI H,WANG J H.Numerical analysis of the installation effect of diaphragm walls in saturated soft clay[J].Acta Geotechnica,2014,9(6):981-991.DOI:10.1007/s11440-013-0284-x.
[15]CARRUBBA P,COLONNA P.A comparison of numerical methods for multi-tied walls[J].Computers&Geotechnics,2000,27(2):117-140.DOI:10.1016/S0266-352X(00)00007-0.
[16]郝峰.高压旋喷桩复合土钉墙Plaxis有限元分析[J].探矿工程(岩土钻掘工程),2009,36(9):52-55.(HAO F.Plaxis finite elements analysis on supporting structure with high-pressure jet grouting pile and composite soil-nailing wall[J].Exploration Engineering(Rock&Soil Drilling&Tunneling),2009,36(9):52-55.(in Chinese))
[17]刘震国.高压旋喷桩止水帷幕在深基坑支护中的应用[J].建筑机械化,2012,33(S1):68-71.(LIU Z G.High pressure chemical churning pile water stop curtain applied in deep foundation pit[J].Construction Mechanization,2012,33(S1):68-71.(in Chinese))
[18]李龙舟.基于ABAQUS软件的覆盖层中塑性混凝土防渗墙的应力变形分析[J].科技创新与应用,2014(2):1-3.(LI L Z.Deformation and stress analysis of plastic concrete cut-off wall in overburden layer with ABAQUS software[J].Technology Innovation and Application,2014(2):1-3.(in Chinese))
[19]朱守鹏.接触算法在桩土结构相互作用中的应用[D].柳州:广西工学院,2012.(ZHU S P.Application of contact algorithm in the pile soil structure interaction[D].Liuzhou:Guangxi University of Technology,2012.(in Chinese))
[20]何良德,苏兴海,徐笛清,等.基于修正剑桥渗流耦合模型的闸室有限元分析[J].中国港湾建设,2013(3):16-21.(HE L D,SU X H,XU D Q,et al.Finite element analysis of chamber walls of ship locks based on modified cam-clay model coupling with biot theory[J].China Harbour Engineering,2013(3):16-21.(in Chinese))
[21]HSIEH P G,OU C Y.Shape of ground surface settlement profiles caused by excavation[J].Canadian Geotechnical Journal,1998,35(6):1004-1017.DOI:10.1139/cgj3561004.
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