Study on Computer Numerical Simulation of Supporting Parameters in Super-large Section Metro Station

2021 IEEE Conference on Telecommunications, Optics and Computer Science (TOCS) Pub Date : 2021-12-10 DOI:10.1109/TOCS53301.2021.9688998

B. Jiang, Shanshan Wu, Xiangbin Li

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Abstract

In order to study the influence of supporting parameters on the displacement and stress of surrounding rock during the construction of metro station with super large section, the method of computer numerical simulation is adopted in this paper. Different supporting parameters such as curvature radius of vertical temporary support, steel arch spacing and shotcrete thickness are selected for simulation study. The result of research shows that, based on the background project, the supporting effect of vertical temporary support is relatively good when the radius of curvature is between 23m and 29m. The displacement and stress of surrounding rock will increase with the increase of steel arch spacing, and the recommended value is between 0.5 m and 1.0m. The increase of shotcrete thickness is conducive to controlling the deformation and improving the stress state of surrounding rock. However, the effect is not obvious when the thickness exceeds 40cm, so it is recommended that the thickness should not exceed 40cm.

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超大断面地铁车站支护参数的计算机数值模拟研究

为了研究特大断面地铁车站施工过程中支护参数对围岩位移和应力的影响，本文采用计算机数值模拟的方法。选取竖向临时支架曲率半径、钢拱间距、喷射混凝土厚度等不同支护参数进行模拟研究。研究结果表明，基于背景工程，当曲率半径在23m ~ 29m之间时，竖向临时支护的支护效果相对较好。围岩位移和应力随钢拱间距的增大而增大，推荐值在0.5 m ~ 1.0m之间。喷射混凝土厚度的增加有利于控制变形，改善围岩应力状态。但厚度超过40cm时效果不明显，所以建议厚度不要超过40cm。

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

2021 IEEE Conference on Telecommunications, Optics and Computer Science (TOCS)

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