Effect of block geometry on the estimation of low volumetric block proportions: A tunneling-based computer bimrock model

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space Pub Date : 2024-11-17 DOI:10.1016/j.undsp.2024.07.008

Zixin Zhao , Guolong Zhu , Xingliang Peng , Fawu Wang

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引用次数: 0

Abstract

Bimrocks have a block matrix structure that affects their characteristic complex geometric features and widely varying engineering properties. Volumetric block proportion (VBP) significantly affects the strength, extent of the plastic zone, and failure mode of bimrocks. VBP is an essential parameter for evaluating bimrock mechanical properties. However, current unadjusted VBP estimations may have large errors that can exceed 100%. Obtaining more accurate VBP estimates at engineering sites is an ongoing problem that needs more attention. In this study, a tunneling-based bimrock model was constructed. The blocks were ellipsoidal, and their geometric features were designed to be changeable. Based on this model, the influence of bimrock block geometry features on the estimation of the VBP was explored. To reduce the estimation error of the VBP in the tunnel, correction factors corresponding to different geometrical features were proposed. The results of this study can help in estimating VBP more accurately in the field. The findings can also provide useful information for the tunnel construction.

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块体几何形状对低体积块体比例估计的影响：基于隧道的计算机块体模型

bimrock具有块状矩阵结构，这影响了其复杂的几何特征和广泛变化的工程性能。体块比（VBP）对双岩体的强度、塑性区范围和破坏模式有显著影响。VBP是评价岩石力学性能的重要参数。然而，目前未经调整的VBP估计可能有很大的误差，可以超过100%。在工程现场获得更准确的VBP估计是一个需要更多关注的问题。在本研究中，建立了一个基于隧道的bimrock模型。这些块是椭球形的，它们的几何特征被设计成可改变的。在此模型的基础上，探讨了双块体几何特征对VBP估计的影响。为了减小隧道内VBP的估计误差，提出了相应于不同几何特征的校正因子。本研究结果有助于在现场更准确地估计VBP。研究结果也可为隧道施工提供有用的资料。

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

Underground Space ENGINEERING, CIVIL-

CiteScore

10.20

自引率

14.10%

发文量

审稿时长

63 days

期刊介绍： Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.