陕西蓝田某隧道围岩关键块体的确定及稳定性分析  

Identification and Stability Analysis of the Key Blocks in Surrounding Rocks of a Tunnel in Lantian Country,Shanxi Province

作　　者：张敏思[1] 林才泽 韩健勇 舒帆 杨勇[1,3] 段绪清 ZHANG Minsi;LIN Caize;HAN Jianyong;SHU Fan;YANG Yong;DUAN Xuqing(School of Civil&Architectural Engineering,East China University of Technology,Nanchang 330013,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110004,China)

机构地区：[1]东华理工大学土木与建筑工程学院,江西南昌330013 [2]山东建筑大学土木工程学院,山东济南250101 [3]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《应用基础与工程科学学报》2025年第1期236-243,共8页Journal of Basic Science and Engineering

基　　金：江西省主要学科学术和技术带头人培养计划项目(20212BCJ23003);国家自然科学基金项目(51864001,52264003,51964002);甘肃省重点研发计划项目(22YF7FH224);江西省教育厅科学技术研究项目(GJJ200725);研究生创新基金项目(YC2023-S565,DHYC-202435)。

摘　　要：针对节理发育隧道中块体识别与稳定性分析问题,提出了一种集结构面信息获取与块体准确识别于一体的创新方法.该方法利用摄影测量技术实现了隧道围岩结构面信息的快速采集;在网格化块体识别方法中引入曲面切割单元算法,通过多面体切割与单元组合技术实现了对复杂块体形态的准确识别.阐述了围岩网格建模、块体识别及稳定性分析流程.以陕西省蓝田县隧道工程为例,成功识别出关键块体,分析结果与现场调查相吻合.研究结果表明,断层和节理对隧道稳定起控制作用,关键块体的失稳会引发连锁反应,危及隧道结构安全,因此准确识别与加固关键块体是一项必要的工作.An innovative method is proposed,aiming at the problems of block identification and stability analysis in jointed tunnels,which integrates discontinuity information acquisition with accurate block identification.Photogrammetry technology is utilized to rapidly collect discontinuity information of surrounding rock.The surface cutting element algorithm is incorporated into the grid-based block identification method,enabling the identification of complex block shapes through cutting and combination techniques.It was systematically outlined that the process of surrounding rock grid modeling,block identification,and stability analysis,aiming to provide readers with a research framework.Taking the Lantian Tunnel project in Shaanxi Province as a case study,key blocks have been successfully identified,and the analysis results are consistent with field investigations.The study reveals that faults and joints govern the stability of tunnels,and the instability of key blocks can trigger a chain reaction,posing a threat to tunnel structural safety.Therefore,it is necessary to identify and reinforce key blocks accurately.

关 键 词：块体理论 结构面识别 块体识别 稳定性分析 隧道开挖 曲面块体 

分 类 号：TU45[建筑科学—岩土工程]