地面荷载对城市隧道围岩变形破坏特征影响  

Impacts of Ground Loads on Deformation and Failure Characteristics of Urban Tunnel Surrounding Rock

作　　者：张新军[1] 张春雷 秦雨霏 沈威 王建望 ZHANG Xinjun;ZHANG Chunlei;QIN Yufei;SHEN Wei;WANG Jianwang(China Railway First Group Co.,Ltd.,Xi′an,Shaanxi 710055,China;Huaiyin Institute of Technology,Huai′an,Jiangsu 223001,China;School of Civil Engineering,Yan′an University,Yan′an,Shaanxi 716000,China)

机构地区：[1]中铁一局集团有限公司,陕西西安710055 [2]淮阴工学院,江苏淮安223001 [3]延安大学建筑工程学院,陕西延安716000

出　　处：《水利与建筑工程学报》2025年第2期191-196,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(52404081);中国博士后科学基金项目(2022M722673);江苏省大学生创新创业训练计划项目(202411049076Y)。

摘　　要：地面荷载对城市隧道围岩变形破坏的影响是隧道工程设计与施工中需要考虑的重要问题。为了探究不同地面荷载条件下隧道围岩的应力、位移分布特征及破坏模式,以某路综合改造工程为背景,基于PHASE2D数值模拟,通过正交试验设计,分析地面荷载大小、分布形式、水平距离及隧道断面形状等因素对围岩应力和位移的影响规律。结果表明:不考虑开挖断面因素,从荷载角度看,荷载水平距离对隧道围岩垂直应力影响最大,其次是荷载分布形式,最后是荷载大小;荷载水平距离对隧道围岩垂直位移影响最大,其次是荷载大小,最后是荷载分布形式。荷载距隧道中线水平距离越近,对围岩变形的影响越大;均布荷载对围岩变形的影响显著大于集中荷载;荷载越大,围岩变形破坏程度越严重;埋深较浅时,拱形断面表现出较好的稳定性。地面荷载对城市隧道围岩变形影响因素最大的是荷载距隧道的水平距离,其次是荷载分布形式,再次是荷载大小。The influence of ground loads on the deformation and failure of urban tunnel surrounding rock is a critical issue in tunnel engineering design and construction.To investigate the stress distribution,displacement characteristics,and failure modes of surrounding rock under various ground load conditions,this study employs PHASE2D numerical simulation and orthogonal experimental design,focusing on a comprehensive road reconstruction project.Key factors including load magnitude,distribution pattern(uniform vs.concentrated),horizontal distance from the tunnel centerline,and cross-sectional shape are analyzed.Results are as follows.From the load perspective(excluding excavation cross-section effects),the horizontal distance of the load exerts the most significant influence on vertical stress,followed by load distribution pattern,and finally load magnitude.For vertical displacement,horizontal distance remains the dominant factor,succeeded by load magnitude and distribution pattern.The closer the horizontal distance of the load to the tunnel centerline,the greater the impact on surrounding rock deformation.Uniform loads induce notably more severe deformation than concentrated loads.Increased load magnitude intensifies deformation and failure of surrounding rock.Under shallow burial conditions,arch-shaped cross-sections demonstrate superior stability compared to other configurations.The main influencing factors of ground load on urban tunnel surrounding rock deformation are the horizontal distance between the load and the tunnel,followed by the form of load distribution,then the magnitude of the load.

关 键 词：地面荷载 PHASE2D 围岩应力 隧道断面 堆载位置 

分 类 号：TU91[建筑科学—建筑理论]