常州地铁车站基坑地下连续墙不同接头型式分析
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摘要
基于常州地铁2号线怀德站基坑工程地下连续墙的设计,利用ABAQUS数值模拟软件,研究了不同接头型式作用下的地下连续墙接头位置的水平位移变化以及接头型式对地下连续墙、支护体系受力变形的影响规律。研究结果表明:接头处的最大水平位移多发生在基坑开挖的上部,据此可以指导工程设计与安全防控,避免接头位置的位移变形过大及大面积渗漏水情况的发生;较柔性接头而言,刚性接头与地下连续墙整体性更好,可以增强围护结构抵抗侧向变形的能力,降低支护体系受力,提升围护结构的稳定性。研究结果可为常州地铁车站基坑工程设计中接头型式的选用提供一定的参考。
For the design of diaphragm wall of Changzhou metro line No. 1 of foundation pit project at Huaide Station, the horizontal displacement response to different mechanical joint modes and the influences of the joint types on the stress of diaphragm wall and support system are studied through ABAQUS simulation. The results show that the maximum horizontal displacement of the joint is most likely to happen at the upper part of excavation surface of foundation pit, leading to a better guidance to prevent the joints from over-large deformation and large-area seepage. Compared with the relative flexible joint,the rigid joint is more compatible with diaphragm wall, and it can increase resistance of retaining structures to resist deformation and to reduce stress of the support system and increase stability of retaining structures. The results can be as reference for choosing the right joint mode for foundation pit project of subway station in Changzhou.
For the design of diaphragm wall of Changzhou metro line No. 1 of foundation pit project at Huaide Station, the horizontal displacement response to different mechanical joint modes and the influences of the joint types on the stress of diaphragm wall and support system are studied through ABAQUS simulation. The results show that the maximum horizontal displacement of the joint is most likely to happen at the upper part of excavation surface of foundation pit, leading to a better guidance to prevent the joints from over-large deformation and large-area seepage. Compared with the relative flexible joint,the rigid joint is more compatible with diaphragm wall, and it can increase resistance of retaining structures to resist deformation and to reduce stress of the support system and increase stability of retaining structures. The results can be as reference for choosing the right joint mode for foundation pit project of subway station in Changzhou.
引文
[1]王卫东,徐中华.深基坑支护结构与主体结构相结合的设计与施工[J].岩土工程学报,2010,32(增刊1):191-199.(WANG Wei-dong,XU Zhong-hua.Design and construction of deep foundation pit supporting structure and main structure[J].Chinese Journal of Geotechnical Engineering,2010,32(S1):191-199.(in Chinese))
[2]孙立宝.地下连续墙施工中几种接头形式的对比分析及应用[J].探矿工程(岩土钻掘工程),2011,38(5):53-56.(SUN Li-bao.Comparison analysis on joint shapes of underground diaphragm wall construction and the application[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2011,38(5):53-56.(in Chinese))
[3]付军,杜峰.地下连续墙接头形式及其在上海四号线修复工程中的应用[J].隧道建设,2010,30(6):678-682.(FU Jun,DU Feng.Types of diaphragm wall joints and their application in restoration works of Shanghai metro line 4[J].Tunnel Construction,2010,30(6):678-682.(in Chinese))
[4]徐中华.上海地区支护结构与主体地下结构相结合的深基坑变形性状研究[D].上海:上海交通大学,2007.(XUZhong-hua.Deformation behavior of deep excavations supported by permanent structure in Shanghai soft deposit[D].Shanghai:Shanghai Jiao Tong University,2007.(in Chinese))
[5]杨宝珠,丁克胜,邵强,等.基于ABAQUS的超深地下连续墙工字钢接头型式分析[J].地下空间与工程学报,2014,10(1):96-101.(YANG Bao-zhu,DING Ke-sheng,SHAO Qiang,et al.Analysis of H-steel joint in ex-deep diaphragm wall based on ABAQUS[J].Chinese Journal of Underground Space and Engineering,2014,10(1):96-101.(in Chinese))
[6]吴兴宏,吴卫宏.地下连续墙不同施工接头类型的分析与应用[J].土工基础,2017,31(1):14-15.(WU Xing-hong,WU Wei-hong.Applications of various construction joints in the slurry wall construction[J].Soil Engineering and Foundation,2017,31(1):14-15.(in Chinese))
[7]程振华,袁晓晴,李建高.粉砂富水地层超深地下连续墙接头质量控制[J].铁道建筑,2012(3):89-91.(CHENGZhen-hua,YUAN Xiao-qing,LI Jian-gao.The quality control of extra-deep diaphragm wall joints in silty sand watery strata[J].Railway Engineering,2012(3):89-91.(in Chinese))
[8]诸以惇,陈卫忠,田洪铭,等.考虑连续墙接头效应的软土大型盾构工作井稳定性分析[J].岩土力学,2011,32(10):2937-2943.(CHU Yi-dun,CHEN Wei-zhong,TIANHong-ming,et al.Stability analysis oflarge shield working well considering effect of diaphragm wall joint[J].Rock and Soil Mechanics,2011,32(10):2937-2943.(in Chinese))
[2]孙立宝.地下连续墙施工中几种接头形式的对比分析及应用[J].探矿工程(岩土钻掘工程),2011,38(5):53-56.(SUN Li-bao.Comparison analysis on joint shapes of underground diaphragm wall construction and the application[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2011,38(5):53-56.(in Chinese))
[3]付军,杜峰.地下连续墙接头形式及其在上海四号线修复工程中的应用[J].隧道建设,2010,30(6):678-682.(FU Jun,DU Feng.Types of diaphragm wall joints and their application in restoration works of Shanghai metro line 4[J].Tunnel Construction,2010,30(6):678-682.(in Chinese))
[4]徐中华.上海地区支护结构与主体地下结构相结合的深基坑变形性状研究[D].上海:上海交通大学,2007.(XUZhong-hua.Deformation behavior of deep excavations supported by permanent structure in Shanghai soft deposit[D].Shanghai:Shanghai Jiao Tong University,2007.(in Chinese))
[5]杨宝珠,丁克胜,邵强,等.基于ABAQUS的超深地下连续墙工字钢接头型式分析[J].地下空间与工程学报,2014,10(1):96-101.(YANG Bao-zhu,DING Ke-sheng,SHAO Qiang,et al.Analysis of H-steel joint in ex-deep diaphragm wall based on ABAQUS[J].Chinese Journal of Underground Space and Engineering,2014,10(1):96-101.(in Chinese))
[6]吴兴宏,吴卫宏.地下连续墙不同施工接头类型的分析与应用[J].土工基础,2017,31(1):14-15.(WU Xing-hong,WU Wei-hong.Applications of various construction joints in the slurry wall construction[J].Soil Engineering and Foundation,2017,31(1):14-15.(in Chinese))
[7]程振华,袁晓晴,李建高.粉砂富水地层超深地下连续墙接头质量控制[J].铁道建筑,2012(3):89-91.(CHENGZhen-hua,YUAN Xiao-qing,LI Jian-gao.The quality control of extra-deep diaphragm wall joints in silty sand watery strata[J].Railway Engineering,2012(3):89-91.(in Chinese))
[8]诸以惇,陈卫忠,田洪铭,等.考虑连续墙接头效应的软土大型盾构工作井稳定性分析[J].岩土力学,2011,32(10):2937-2943.(CHU Yi-dun,CHEN Wei-zhong,TIANHong-ming,et al.Stability analysis oflarge shield working well considering effect of diaphragm wall joint[J].Rock and Soil Mechanics,2011,32(10):2937-2943.(in Chinese))