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| Analysis of Vertical Load － bearing Characters of Closed Underground Diaphragm Wall |
| SONG Zhang1，CHENG Qian － gong2，LI Dong1 |
| 1． China Railway Eryuan Engineering Group Co． Ltd，Chengdu，Sichuan 610031，China; 2． Southwest Jiaotong University，Chengdu，Sichuan 610031，China |
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Abstract Research purposes: With the numerical computation，considering the bearing capacity of the soil core within the closed underground diaphragm wall，the characters of the load － settlement，inside and outside frictional resistances，end － bearing resistance，resistance on the top soil core and its load － sharing ratio of the closed diaphragm wall were analyzed in detail，and the load transfer characteristics of the closed diaphragm wall were discussed．
Research conclusions: The closed underground diaphragm wall was in form of the whole settlement，and the up and middle parts of soil core presented the basic synchro settlement with the wall． The bottom part of soil core behaved the compressive deformation feature． The vertical load － bearing of the base relied on its settlement with the bearing characteristic of end skin friction bearing wall． As the inside and outside skin frictions of the wall presented the dissimilar operation mechanism，the most deformation of the the soil outside of the wall were the shearing deformation featured with effects of the outside skin friction from top to bottom． However，the inside skin friction，due to suffering upward compressive deformation， took place gradually from the bottom to the top when the bottom part of soil core was subjected to the reaction． The effect of the outside skin friction preexisted the end － resistance，sequentially the inside skin friction． The inside resistance along the depth presented exponential function expression．
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Received: 16 May 2011
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［1］ 许黎明． 一种新的桥梁基础型式———地下连续墙基础［J］． 国外桥梁，1995( 3) : 230 －234．
Xu Liming． A New Type of Foundation: Diaphragm Wall Foundation［J］． World Bridge，1995( 3) : 230 －234．
［2］ 孙学先，崔文鉴． 地下闭合墙基础的计算方法研究［J］．兰州铁道学院学报， 1991( 2) : 60 －69．
Sun Xuexian，Cui Wenjian． Astudy on the Analytical Method of Closed Wall Foundation［J］． Journal of Lanzhou Railway College，1991( 2) : 60 －69．
［3］ 森下忠，等． 地下連続壁井筒基礎の施工［J］． 基礎工，1984( 12) : 81 －85．
Sinriru Cyu， etc． Construction of Well － shaped Diaphragm Wall Foundation ［ J］． Foundation Engineering， 1984( 12) : 81 －85．
［4］ 刘明虎，付宇文． 井筒式地下连续墙基础设计及应用［J］． 公路，2006( 5) : 52 －56．
Liu Minghu，Fu Yuwen． Design and Application of Closed Diaphragm Wall Foundation［J］． Highway， 2006 ( 5) : 52 －56．
［5］ 丛蔼森． 地下连续墙的设计施工与运用［M］． 北京: 中国水利水电出版社， 2001．
Cong Aisen． The Design and Construction and Application of Diaphragm Walls［M］． Beijing: China Water Power Press， 2001．
［6］ 松橋数保，高橋将德． 道路橋における地下連壁井筒基礎の設計． 基礎工，1984( 10) : 74 －78．
Matsubase Kazuho，etc． The Design of Diaphragm Wall Well Foundation in Road Bridge Engineering ［J］．Foundation Engineering，1984 ( 10) : 74 －80．
［7］ 周建军，饶思礼，张有光，等． 虎门大桥锚碇大型混合基础的设计与施工［J］． 桥梁建设， 1995( 2) : 44 －48．
Zhou Jianjun，Rao Sili，Zhang Youguang， etc，Guan Hua．Design and Construction of Big Anchorage Mixed Foundation of Humen Bridge［J］． Bridge Construction，1995( 2) : 44 －48．
［8］ 郭慧光，孙旻，徐伟． 地墙“巨无霸”———武汉阳逻长江公路大桥45 埋深的南锚碇圆形地下连续墙施工及受力特性分析［J］． 建筑施工， 2004 ( 3) : 188 －191．
Guo Huiguang，Sun Wen，Xu Wei． Gigantic Slurry W all－Analysis of Load － bearing Properties in Construction Section of Circular Slurry Wall ［J］． Building Construction， 2004 ( 3) : 188 －191．
［9］ 李桂花，周生华，周纪煜，等． 地下连续墙垂直承载力试验研究［J］． 同济大学学报， 1993( 4) : 575 －581．
Li Guihua，Zhou Shenghua，Zhou Jiyu，etc． Vertical Bearing Test of the Diaphragm Wall［J］． Journal of Tongji University， 1993 ( 4) : 575 －581．
［10］ 傅德明，王国庆，夏明耀． 地下连续墙垂直承载力现场试验研究［J］． 地下工程与隧道， 1997( 2) : 24 －31．
Fu Deming，Wang Guoqing，Xia Mingyao． An In － situ Static Vertical Bearing Test of the Diaphragm Wall［J］．Underground Engineering and Tunnel， 1997( 2) : 24 －31．
［11］ 常红，夏明耀，傅德明． 地下连续墙垂直承载力室内模型试验研究［J］． 同济大学学报， 1998 ( 3) : 279 －284．
Chang Hong，Xia Mingyao，Fu Deming． Investigation of Laboratory Scale － down Test of Vertical － loaded Diaphragm Wall［J］． Journal of Tongji University， 1998( 3) : 279 －284．
［12］ 宋章，程谦恭，龚维明，等． 竖向静载荷下黄土地基矩形地下连续墙现场试验研究［J］． 岩土力学， 2008( 10) : 2713 －2718．
Song Zhang，Cheng Qiangong，Gong Weiming，etc．An In － situ Static Vertical Loading Test Study on Rectangular Diaphragm Wall in Loess Subgrade［J］，Rock and Soil Mechanics，2008( 10) : 2713 － 2718．
［13］ 高夕良． 地下连续墙入土深度的分析［J］． 铁道工程学报， 2008( 4) : 28 － 32．
Gao Xiliang． Analyses of the EmbedmentDepth of Underground Continuous Wall ［J］． Journal of Railway Engineering Society， 2008( 4) : 28 － 32．
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2011, Vol. 28 
