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Deformation Monitoring and Performance Analysis on the Shield Tunnel Influenced by Adjacent Deep Excavations

机译：邻近深基坑影响的盾构隧道变形监测与性能分析

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摘要

The health monitoring and analysis on the metro tunnels are very important because the metro system is the lifeline of metropolises and the shield tunnels are easily affected by adjacent constructions. In this paper, health monitoring on the deformation of operating metro shield tunnels influenced by a close deep excavation is investigated with a case in Shanghai. Both manual and automatic measuring methods were adopted in the safety monitoring during deep excavation, and the results of both methods are compared to analyze the deviation of measuring methods. Comparison shows that the automatic monitoring results could be affected by poor working conditions and cumulative error. It is suggested that different monitoring methods should be verified against each other to ensure the reliability and accuracy of the monitoring results. Based on the distribution of tunnel settlements, the curvature radius of tunnel deformation is obtained by the cubic B-spline method and then used in performance analysis on the tunnels. The relationship between the settlements and horizontal convergences of the shield tunnels are also studied, which shows a significant correlation. Analysis shows that there is no significant relationship between the curvature radius and settlements of the tunnel, which means monitoring and controlling the settlements plays an important role in protection of the tunnels but cannot guarantee the safety of tunnels. The real-time data of the curvature radius should also be calculated and analyzed in health monitoring and performance analysis on shield tunnels. (C) 2015 American Society of Civil Engineers.
机译：地铁隧道的健康监测和分析非常重要，因为地铁系统是大都市的生命线，而盾构隧道很容易受到邻近建筑的影响。本文以上海为例，对封闭地铁深埋施工对地铁盾构隧道变形的健康监测进行了研究。在深基坑开挖安全监测中，采用了手动和自动两种测量方法，并对两种方法的结果进行了比较，以分析测量方法的偏差。比较表明，自动监视结果可能会受到不良工作条件和累积误差的影响。建议应相互验证不同的监视方法，以确保监视结果的可靠性和准确性。根据隧道沉降的分布情况，利用三次B样条法求得隧道变形的曲率半径，并将其用于隧道的性能分析。还研究了盾构隧道沉降与水平收敛之间的关系，显示出显着的相关性。分析表明，曲率半径与隧道沉降之间没有显着关系，这意味着对沉降的监测与控制在保护隧道方面起着重要作用，但不能保证隧道的安全。在盾构隧道的健康监测和性能分析中，还应计算和分析曲率半径的实时数据。 （C）2015年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2017年第2期|B4015002.1-B4015002.11|共11页
  • 作者

    Zhang Hong-Bing; Chen Jin-Jian; Fan Fan; Wang Jian-Hua;

  • 作者单位

    Shanghai Jiao Tong Univ, Dept Civil Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Civil Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Civil Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Civil Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

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