深基坑水平支撑间距优化设计研究  

Design Study on Spacing Optimization of Horizontal Braces in Deep Foundation Pit

作　　者：胡建林[1,2] 冯桂帅 梁玲玉 李玉忠[1] 郭强 HU Jianlin;FENG Guishuai;LIANG Lingyu;LI Yuzhong;GUO Qiang(Hebei University of Architecture,Zhangjiakou Hebei 075000,China;Hebei Key Laboratory for Diagnosis,Reconstruction and Anti disaster of Civil Engineering,Zhangjiakou Hebei 075000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断改造与抗灾重点实验室,河北张家口075000

出　　处：《铁道建筑》2017年第11期90-93,共4页Railway Engineering

基　　金：河北省教育厅项目(ZC2016161)

摘　　要：以苏州市一地铁车站深基坑的开挖支护设计方案为依托,运用MIDAS/GTS NX三维有限元数值分析软件进行了支撑间距优化数值模拟研究。通过二维建模优选出目标优化方案,应用于三维模型,验证二维优选方案的合理性。结果表明:各道支撑分别布设于各开挖层顶部,若标准段以比例7.5∶4.8∶3.7∶2.5分配18.5 m的开挖深度,端头井以比例5.5∶4.3∶4.0∶3.8∶2.5分配20.1 m的开挖深度,可使地下连续墙墙体壳应力峰值减小约29.14%,大量减少墙体配筋,使工程建设更为经济。The design scheme of deep foundation pit excavation of a metro station in Suzhou is the background of this research.A three dimensional finite element numerical analysis is conducted to optimize the support spacing using MIDAS GTS NX.Firstly,the scheme is optimized through a two dimensional modeling,and then it is applied to the three dimensional model to verify the rationality of the two dimensional optimization scheme.The results validate the benefit of the optimization of which all supports are placed at the tops of the excavation layers.If the standard segmentis distributed to the185m digging depth at the ratio of7.5∶4.8∶3.7∶2.5and the end well is distributed to the20.1m digging depthat the ratio of5.5∶4.3∶4.0∶3.8∶2.5,the peak value of shell stress in the underground continuous wall can be reduced to29.14%approximately.In this way,the amount of reinforcement in the wall can be greatly reduced and the project can be more economical.

关 键 词：地铁 深基坑支护 数值模拟 支撑竖向间距 优化设计 

分 类 号：TU942[建筑科学—建筑技术科学]