非对称超载条件下深基坑支护结构的变形分析
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摘要
文章以苏州地铁1号线深基坑工程为研究背景,采用GTS软件对基坑支护体系进行了有限元分析;考虑支护结构与土体的共同作用,计算和分析了非对称超载条件下支护结构的内力和变形,并与对称超载条件下的计算结果进行对比,得到了非对称超载条件下支护结构内力和变形的分布规律。计算和分析结果表明:非对称超载状态下,基坑支护体系超载侧支撑轴力略大于对称超载条件下的支护结构,但超载侧的位移较大,基坑的稳定性处于最不利的状态。研究结果将有助于提高深基坑设计水平,为类似工程的设计、施工和研究提供必要的数据。
The deformation of the supporting system of deep foundation pit is analyzed by using the Midas GTS software based on the deep foundation pit project of Suzhou Metro Line 1.Considering the coordinative action between supporting structure and soil,the internal force and deformation of the supporting structure are calculated and analyzed under the condition of asymmetric overloading.The distributing laws of the internal force and deformation of supporting structure under the condition of asymmetry overloading are obtained by the comparison with the results under the condition of symmetric overloading.The results of calculation and analysis show that the internal force of supporting structure on overloading side under the condition of asymmetric overloading is slightly larger than that of supporting structure under the condition of symmetric overloading,but the displacement of overloading side is larger,resulting in the instability of the deep foundation pit.The results can help to improve the design level and security of deep foundation pit as well as provide valuable reference for the design,construction and research of similar projects.
The deformation of the supporting system of deep foundation pit is analyzed by using the Midas GTS software based on the deep foundation pit project of Suzhou Metro Line 1.Considering the coordinative action between supporting structure and soil,the internal force and deformation of the supporting structure are calculated and analyzed under the condition of asymmetric overloading.The distributing laws of the internal force and deformation of supporting structure under the condition of asymmetry overloading are obtained by the comparison with the results under the condition of symmetric overloading.The results of calculation and analysis show that the internal force of supporting structure on overloading side under the condition of asymmetric overloading is slightly larger than that of supporting structure under the condition of symmetric overloading,but the displacement of overloading side is larger,resulting in the instability of the deep foundation pit.The results can help to improve the design level and security of deep foundation pit as well as provide valuable reference for the design,construction and research of similar projects.
引文
[1]唐孟雄,陈如桂,陈伟.深基坑工程变形控制[M].北京:中国建材工业出版社,2006:5-67.
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[3]陆新征,宋二祥.某特深基坑考虑支护结构与土体共同作用的三维有限元分析[J].岩土工程学报,2003,25(4):488-491.
[4]宋二祥,娄鹏.某特深基坑支护的非线性三维有限元分析[J].岩土力学,2004,25(4):538-543.
[5]俞晓.深基坑开挖与支护的模型试验与ANSYS分析研究[D].武汉:武汉理工大学,2005.
[6]芮瑞,夏元友.基于三维有限元的地下连续墙深基坑逆作法施工方案设计[J].岩土力学,2008,29(5):1391-1395.
[7]Ou Changyu,Chiou D C,Wu T S.Three-dimensional finiteelement analysis of deep excavations[J].Journal ofGeotechnical Engineering,1996,122(5):337-345.
[8]秦四清.深基坑工程优化设计[M].北京:地震出版社,1998:14-24.
[9]JGJ120-99,建筑基坑支护技术规程[S].
[10]王凯,钱德玲.液化场地的桩-土-上部结构振动台模型试验的研究[J].合肥工业大学学报:自然科学版,2011,34(11):1687-1691.
[11]GB50009-2001,建筑结构荷载规范[S].
[2]赵海燕,黄金枝.深基坑支护结构变形的三维有限元分析与模拟[J].上海交通大学学报,2001,35(4):610-613.
[3]陆新征,宋二祥.某特深基坑考虑支护结构与土体共同作用的三维有限元分析[J].岩土工程学报,2003,25(4):488-491.
[4]宋二祥,娄鹏.某特深基坑支护的非线性三维有限元分析[J].岩土力学,2004,25(4):538-543.
[5]俞晓.深基坑开挖与支护的模型试验与ANSYS分析研究[D].武汉:武汉理工大学,2005.
[6]芮瑞,夏元友.基于三维有限元的地下连续墙深基坑逆作法施工方案设计[J].岩土力学,2008,29(5):1391-1395.
[7]Ou Changyu,Chiou D C,Wu T S.Three-dimensional finiteelement analysis of deep excavations[J].Journal ofGeotechnical Engineering,1996,122(5):337-345.
[8]秦四清.深基坑工程优化设计[M].北京:地震出版社,1998:14-24.
[9]JGJ120-99,建筑基坑支护技术规程[S].
[10]王凯,钱德玲.液化场地的桩-土-上部结构振动台模型试验的研究[J].合肥工业大学学报:自然科学版,2011,34(11):1687-1691.
[11]GB50009-2001,建筑结构荷载规范[S].
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