Numerical Study on Medium-Diameter EPB Shield TBM by Discrete Element Method

IF 0.4 Q4 ENGINEERING, GEOLOGICAL
Soon-Ju Choi, Byungkwan Park, T. Kang, Soo-Ho Chang, Chulho Lee
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引用次数: 4

Abstract

The Discrete Element Method (DEM) has been widely used in granular material researches. Especially, if material has a large deformation, such as ground, it can be a useful method to analyze. In this study, to simulate ground formations, DEM was used. The main purpose of DEM analysis was to investigate the numerical model which can predict the TBM performance by simulating excavating procedure. The selected EPB TBM has a 7.73 m of diameter and six spokes. And two pre-defined excavation conditions with the different rotation speeds per minute (RPM) of the cutterhead was applied. In the modeled cutterhead, the open ratio of cutterhead was 21.31% and number of cutters (including disc cutter and cutter bit) was 219. From the results, reaction forces and resistant torques at the cutterhead face and cutting tools, were measured and compared. Additionally the muck discharge rate and accumulated muck discharge by the screw auger were evaluated.
中径EPB盾构掘进机离散元法数值研究
离散元法(DEM)在颗粒材料研究中得到了广泛的应用。特别是,如果材料有很大的变形,如地面,它可以是一个有用的方法来分析。在本研究中,使用DEM模拟地面地层。DEM分析的主要目的是研究通过模拟掘进过程来预测TBM性能的数值模型。所选择的EPB掘进机直径为7.73 m,有6条辐条。采用预先设定的两种开挖工况,分别采用不同的刀盘转速(RPM)。模型刀盘开度比为21.31%,刀(包括盘刀和刀钻头)数量为219个。根据结果,测量并比较了刀盘端面和刀具处的反作用力和阻力扭矩。此外,还对螺旋钻排渣率和累积排渣量进行了评价。
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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