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首页> 外文期刊>Journal of Modern Transportation >An analytic study on the deflection of subway tunnel due to adjacent excavation of foundation pit
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An analytic study on the deflection of subway tunnel due to adjacent excavation of foundation pit

机译：基坑相邻开挖引起的地铁隧道挠度分析研究

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Abstract Predicting and estimating the response of subway tunnel to adjacent excavation of foundation pit is a research focus in the field of underground engineering. Based on the principle of two-stage method and incremental method, an analytic approach is suggested in this paper to solve this problem in an accurate and rapid way, and the upheavals of tunnel due to adjacent excavation are solved by analytic method. Besides, the presented method is used in the practical engineering case of Shenzhen Metro Line 11 and verified by numerical simulation and in situ measurement. Finally, a parametric analysis is performed to investigate the influence of different factors on tunnel’s deflection. Some useful conclusions have been drawn from the research as below: The deflection results of tunnel obtained from analytic method are nearly consistent with the results getting from numerical analysis and measured data, which verified the accuracy and rationality of presented method. The excavation size has a significant impact on both the displacement values and influenced range of tunnel. However, the relative distance only impacts the displacement values of tunnel, but not the influenced range of tunnel. It may provide certain reference to analyze the deflection of subway tunnel influenced by adjacent excavation.
机译：摘要预测和估算地铁隧道对基坑邻近开挖的响应是地下工程领域的研究重点。本文基于两阶段法和增量法的原理，提出了一种解析方法，以一种准确，快速的方式解决该问题，并通过解析法解决了因相邻开挖引起的隧道的动荡。此外，该方法还用于深圳地铁11号线的实际工程案例，并通过数值模拟和现场测量进行了验证。最后，进行参数分析，以研究不同因素对隧道挠度的影响。研究得出了一些有益的结论：解析方法得到的隧道挠度结果与数值分析和实测数据得到的结果几乎一致，证明了所提方法的准确性和合理性。开挖尺寸对隧道的位移值和影响范围都有重大影响。但是，相对距离仅影响隧道的位移值，而不影响隧道的影响范围。为分析邻近开挖对地铁隧道的挠度提供参考。

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