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崔维久, 刘俊岩, 刘燕. 特殊工况下地铁基坑多支撑负载响应研究[J]. 岩土工程学报, 2012, 34(suppl): 282-286.
引用本文: 崔维久, 刘俊岩, 刘燕. 特殊工况下地铁基坑多支撑负载响应研究[J]. 岩土工程学报, 2012, 34(suppl): 282-286.
CUI Wei-jiu, LIU Jun-yan, LIU Yan. Response of multi-steel shotcrete under load in subway excavations[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(suppl): 282-286.
Citation: CUI Wei-jiu, LIU Jun-yan, LIU Yan. Response of multi-steel shotcrete under load in subway excavations[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(suppl): 282-286.

特殊工况下地铁基坑多支撑负载响应研究

Response of multi-steel shotcrete under load in subway excavations

  • 摘要: 对济南省会文化艺术中心地铁车站基坑进行现场施工监测,及时掌握支承轴力、基坑变形的变化动态。结合设计方案,对比分析影响实际轴力变化的因素:①特殊工况条件下,导致多道支撑体系中第一道支撑轴力偏大,且大于第二道、第三道支撑轴力;②通过测温与测力,反算出支撑轴力的温度修正系数;③合理确定预加力大小,减小应力损失,保障钢支撑更好的发挥作用。该研究结果提高了现场基坑监测的准确性,也完善了基坑支护的设计理论。

     

    Abstract: Through the construction monitoring of subway station excavation in Cultural and Artistic Center of Jinan, change of axial force and deformation of steel shotcrete is gained in time. Combined with the design plan, the influencing factors for the axial force are analyzed: (1) the axial force of the first steel shotcrete is larger than the design value under certain construction conditions, and it is larger than that of the second and the third ones; (2) the temperature and axial force are gained to determine the temperature correction factor by inverse computation; (3) to rationally determine the pre-tension to reduce stress loss so as to make full play of multi-steel shotcrete. The results may make the monitoring works more exact and the design theory more perfect.

     

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