Dynamic response analysis of the process of the utility shield tunnel under-passing the operating subway tunnel

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2023-07-25 DOI:10.56748/ejse.234433

Jingyao Sun, Xingkai Pei, Cheng Yang, Binzhong Zhu

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引用次数: 0

Abstract

In order to analyze the interaction between the operating subway tunnel and the utility tunnel under construction during the utility tunnel under-passing the subway tunnel, an operating tunnel-stratum-utility shield tunnel coupled dynamic calculation model is established taking the utility tunnel under construction under-passing the Guangzhou-Foshan line subway project as an example. And the interaction between the existing tunnel and utility tunnel was studied. The results show that the amplitude change of the vertical displacement, acceleration and additional vertical stress are most influenced by the under-passing shield tunnel when the train operating on one line, and the max changes are 0.01 mm, 0.03m/s2 and 1.5kPa, respectively. The vertical displacement and acceleration response generated by the train operation during the excavation of the new tunnel can be neglected, but the vertical additional stress will have the max change of 2.1kPa. The closer the distance between the train load to the new and old tunnel structures are, the greater the displacement, acceleration and additional stresses of the new and old tunnel structures are when the trains are running in different lines. Structural safety calculations show that the old and new tunnel structures are safe during the utility shield tunnel under-passing. The study can provide useful reference for the construction and operation of similar tunnels.

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盾构隧道通过运营地铁隧道过程的动力响应分析

为了分析在用隧道穿越地铁隧道过程中，在用隧道与在建隧道的相互作用，以广佛线地铁工程在建隧道为例，建立了在用隧道-地层-盾构-隧道耦合动力计算模型。并对既有隧道与公用工程隧道之间的相互作用进行了研究。结果表明，当列车在一条线路上运行时，盾构隧道对垂直位移、加速度和附加垂直应力的振幅变化影响最大，最大变化分别为0.01mm、0.03m/s2和1.5kPa。新隧道开挖过程中列车运行产生的垂直位移和加速度响应可以忽略，但垂直附加应力的最大变化为2.1kPa。列车荷载与新旧隧道结构的距离越近，位移越大，新旧隧道结构的加速度和附加应力是列车在不同线路上运行时产生的。结构安全计算表明，在盾构隧道贯通过程中，新旧隧道结构是安全的。该研究可为类似隧道的施工和运营提供有益的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.