Scholarlink

<p>This paper presents a modeling and identification approach for tunnel surrounding rock blocks based on triangular mesh models. An independently written parametric modeling program for tunnel triangular mesh models was developed, as well as the update method for vertex indices of triangular mesh models. The recognition effect of non-connected blocks after cutting the base model with three types of structural surface models was tested. The determination criteria and identification algorithm for blocks on the excavation face of tunnels were proposed, and the block normal vector was transformed into motion constraints to discriminate the initial dangerous blocks. Based on the above-mentioned method, the spatial positions and morphological characteristics of the initial dangerous blocks were analyzed and the determination method for the contact relationship of blocks was proposed. Therefore, the contact relationship of secondary dangerous blocks was analyzed, enabling precise identification of tunnel chain collapses. The block collapse process of the YK11 + 060 section of the Ganggou Tunnel on the Beijing–Shanghai Expressway, China, was replicated. The prediction results were compared and analyzed with the spatial positions, scales, quantities, and morphological characteristics of the collapsed blocks, verifying the applicability of this method.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Reconstruction of Block Model of Tunnel Surrounding Rock and Prediction Method of Chain Collapse Process

  • 期刊论文

  • 发表日期：

    2025年12月22日

查看全文
  • Hongliang Liu,
  • Xin Gao,
  • Binggang Yan,
  • Shicheng Wang,
  • Zhongxu Zhou,
  • Xinbo Jiang

摘要

This paper presents a modeling and identification approach for tunnel surrounding rock blocks based on triangular mesh models. An independently written parametric modeling program for tunnel triangular mesh models was developed, as well as the update method for vertex indices of triangular mesh models. The recognition effect of non-connected blocks after cutting the base model with three types of structural surface models was tested. The determination criteria and identification algorithm for blocks on the excavation face of tunnels were proposed, and the block normal vector was transformed into motion constraints to discriminate the initial dangerous blocks. Based on the above-mentioned method, the spatial positions and morphological characteristics of the initial dangerous blocks were analyzed and the determination method for the contact relationship of blocks was proposed. Therefore, the contact relationship of secondary dangerous blocks was analyzed, enabling precise identification of tunnel chain collapses. The block collapse process of the YK11 + 060 section of the Ganggou Tunnel on the Beijing–Shanghai Expressway, China, was replicated. The prediction results were compared and analyzed with the spatial positions, scales, quantities, and morphological characteristics of the collapsed blocks, verifying the applicability of this method.