摘要
为研究宁波某隧道围岩和支护参数对施工的影响,以便进一步制定施工控制措施,文中采用ABAQUS对某隧道施工段建立数值模型,并对围岩弹性模量、围岩内摩擦角、衬砌混凝土弹性模量进行参数敏感性分析。结果表明围岩弹性模量的敏感性因子最大,达到1.838,对隧道拱顶下沉影响最大;内摩擦角的敏感性因子最小,达到0.067,可以忽略不计。因此在施工时需要格外加强围岩的抗变形能力。研究成果对制定施工技术控制措施具有一定的理论和现实意义。
The influence of surrounding rock and supporting parameters on the construction of a tunnel in Ningbo is studied to enable further development of construction control measures.A numerical model of a construction section of the tunnel is established by ABAQUS software,in which parameter sensitivity analysis on elastic modulus of sur⁃rounding rock,internal friction angle of surrounding rock,and elastic modulus of lining concrete are carried out.The results show that the sensitivity factor of surrounding rock elastic modulus is the largest,reaching 1.838,which has the greatest influence on the subsidence of tunnel vault.The sensitivity factor of internal friction angle is the small⁃est,reaching 0.067,which can be ignored.Therefore,the deformation resistance of the surrounding rock needs to be particularly strengthened during construction.The research results have a certain theoretical and practical signifi⁃cance for the formulation of construction technology control measures.
作者
黄佳敏
徐亦冬
吴萍
HUANG Jiaming;XU Yidong;WU Ping(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 404100,China;School of Civil Engineering and Architec-ture,Ningbo Tech University,Zhejiang Ningbo 315000,China)
出处
《低温建筑技术》
2023年第6期142-146,共5页
Low Temperature Architecture Technology
关键词
公路隧道
风险管理
敏感性分析
有限元模拟
highway tunnel
risk management
sensitivity analysis
finite element analysis
