Numerical study on the response of ground movements to construction activities of a metro station using the pile-beam-arch method

Li B.; Wang Z. Z.

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Numerical study on the response of ground movements to construction activities of a metro station using the pile-beam-arch method

机译：桩-梁-拱法对地铁车站地面运动对施工活动响应的数值研究

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This paper aims to investigate the issues associated with the pile-beam-arch method for construction of metro stations. First, a detailed description of the procedures involved in the construction of a metro station is given. Secondly, a three-dimensional numerical model is established by FLAC(3D) to simulate the main construction process in practice, which consists of three phases, the excavation of the pilot tunnels, the installation of the load-bearing system, and the removal of the soil inside the metro station. These phases are then divided into fifteen construction steps, at the end of which the resulting ground surface settlements are recorded and analyzed. Numerical results reveal that the resulting displacements can be divided into four categories, the tunneling-induced settlement, the settlement occurs in response to an increase in vertical pressure, the tunneling-induced settlement in the presence of the load-bearing system, and the settlement occurs in response to a decrease in vertical pressure. Thirdly, the effects of settlement control measures are evaluated and discussed. Lastly, the comparison between the simulated and observed ground surface settlements collected from the existing literature are used to illustrate the effects of dewatering and the construction of working shafts and connecting tunnels.

机译：本文旨在研究与地铁车站施工中的桩梁拱法有关的问题。首先，给出了地铁站建设过程的详细描述。其次，通过FLAC（3D）建立了一个三维数值模型，模拟了实际施工过程中的主要过程，包括三个阶段，先导隧道的开挖，承重系统的安装，拆除承重系统。地铁站内的土壤。然后将这些阶段分为15个施工步骤，最后记录并分析所产生的地面沉降。数值结果表明，所产生的位移可分为四类：隧道引起的沉降，响应竖向压力的增加而发生的沉降，存在承重系统的隧道引起的沉降以及沉降。响应于垂直压力的降低而发生。第三，评估和讨论了沉降控制措施的效果。最后，从现有文献中收集的模拟地表沉降与实测地表沉降之间的比较被用来说明脱水的影响以及工作井和连接隧道的建造。

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《Tunnelling and underground space technology》 |2019年第6期|209-220|共12页
作者
Li B.; Wang Z. Z.;
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作者单位

Wuhan Univ Technol, Sch Transportat, Wuhan, Hubei, Peoples R China|Hubei Highway Engn Res Ctr, Wuhan, Hubei, Peoples R China;

Dalian Univ Technol, Sch Civil Engn, Dalian, Peoples R China;

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正文语种 eng
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关键词
Metro station; The pile-beam-arch method; Pilot tunnels; Ground surface settlement; Settlement control measures;

机译：地铁车站;桩梁拱法;引航隧道;地表沉降;沉降控制措施;

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Numerical study on the response of ground movements to construction activities of a metro station using the pile-beam-arch method

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