多因素作用下洞室围岩应力重分布特征及扰动区范围研究  

Study on Stress Redistribution Characteristics and Disturbance Zone Range of Cavern Surrounding Rock Under Multi-Factor Action

作　　者：付崔伟 FU Cuiwei(China Railway First Survey and Design Institute Group Co.Ltd.,Xi′an Shaanxi 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《铁道建筑技术》2025年第1期27-31,共5页Railway Construction Technology

基　　金：国家重点研发计划项目(2023YFB2603900);中国铁建股份有限公司科技研发计划项目(2021-B16)。

摘　　要：地下洞室开挖会引起围岩应力重分布,形成围岩扰动区。采用数值模拟方法,首先以圆形隧道为例,探讨了多因素影响下地下洞室开挖过程中围岩应力重分布特征及扰动区范围;然后,将研究成果应用于某铁路工程隧道。研究表明:围岩较差时,围岩等级对扰动区范围影响较大;侧压力系数、洞室直径对扰动区影响较大;浅埋隧道扰动区受埋深影响较明显;支护作用对扰动区影响有限。通过实际工程铁路隧道与等效圆形隧道围岩扰动区的对比,验证了研究成果的适用性。该成果有助于更好地理解复杂条件下围岩扰动特征,为地下洞室的施工和支护设计提供指导。The excavation of underground caverns will cause the redistribution of surrounding rock stress and form a disturbance zone of surrounding rock.Firstly,taking the circular tunnel as an example,the redistribution characteristics of surrounding rock stress and the range of disturbance zone during the excavation of underground caverns under the influence of multiple factors are discussed by the numerical simulation method.Then,the research results are applied to the tunnel of a railway project.The research shows that when the surrounding rock is poor,the surrounding rock grade has a great influence on the range of the disturbance zone.The lateral pressure coefficient and diameter of the cavern have a great influence on the disturbance zone.The disturbance zone of shallow tunnel is obviously affected by the buried depth.The supporting effect has limited influence on the disturbance zone.The applicability of the research results is verified by the comparison of the surrounding rock disturbance zone between the actual railway tunnel and the equivalent circular tunnel.The results are helpful to better understand the disturbance characteristics of surrounding rock under complex conditions and provide guidance for the construction and support design of underground caverns.

关 键 词：地下洞室 隧道 数值分析 围岩扰动区 应力重分布 参数分析 

分 类 号：U451[建筑科学—桥梁与隧道工程]