三峡大学学报（自然科学版）2025，Vol.47Issue(2)：12-18,7.DOI:10.13393/j.cnki.issn.1672-948X.2025.02.002
基于应力路径的隧洞开挖扰动区空间演化机制研究
Study on the Spatial Evolution Mechanism of Tunnel Excavation Disturbance Zone Based on Stress Path
摘要
Abstract
Revealing the spatial evolution mechanism of tunnel excavation disturbance zone is crucial for ensuring construction safety and optimizing support schemes.This study focuses on the spatial effects of hydraulic tunnel excavation,relying on the structurally intact sandstone slate section of a deeply buried water diversion tunnel project as a case study.Through detailed numerical analysis of the excavation process,the study examines the stress path,deformation development,and plastic zone expansion during the spatial evolution of the tunnel excavation disturbance zone.The study systematically uncovers the spatial evolution mechanism of the hydraulic tunnel excavation disturbance zone.Based on the specific rock mechanical parameters of the engineering example,the disturbance zone resulting from tunnel excavation extends approximately 4.6 times the tunnel diameter into the surrounding rock.The spatial evolution primarily occurs within the rock mass excavation range of about 80%the tunnel diameter behind and approximately 1.7 times the tunnel diameter in front of the excavation area.Stress field adjustments are evident not only in magnitude but also in direction.The adjustments exhibit different patterns at various stages,with larger adjustments occurring at shallower depths.Deformation development and plastic yielding in the disturbance zone are driven by stress field adjustments.The formation and expansion of the plastic zone are significant factors in driving stress field adjustments to greater depths and directly influence the deformation distribution characteristics and magnitude within the disturbance zone.关键词
水工隧洞/开挖扰动/空间演化/应力路径/数值分析Key words
hydraulic tunnel/excavation disturbance/spatial evolution/stress path/numerical analysis分类
水利科学引用本文复制引用
陈金鹏,徐磊,查新元,戴博伦,严鑫鹏,夏超杰..基于应力路径的隧洞开挖扰动区空间演化机制研究[J].三峡大学学报（自然科学版）,2025,47(2):12-18,7.基金项目
国家自然科学基金项目(51979092) （51979092）
