摘要
钢拱架常作偏压隧道的支护结构,其应力变化对隧道的稳定性影响较大。以某铁路隧道偏压段为研究对象,利用SAP2000对该隧道进行建模,通过在模型中选取关键位置,施加与现场实测相近的应力,分析了不同来压对钢拱架应力变化的影响。分析结果为:在初期支护中,钢拱架应力的变化能通过围岩压力有效地反映,围岩压力越大,钢拱架应力变化越大。研究结果可为隧道支护结构的稳定性分析和施工提供一定的借鉴。
Steel arches often serve as support structures for the unsymmetrically loaded tunnel,and the stress changes are particularly important for the stability of the tunnel.Taking the bias section of a railway tunnel as the research object,the tunnel was modeled by using SAP2000.The key position was selected and the stress similar to the actual measurement was applied.The influence of different pressures on the stress change of the steel arch was analyzed.It is concluded that the surrounding rock changes can be effectively reflected by the steel arch in the initial support.The greater the surrounding rock pressure,the greater the stress change of the steel arch,and the stress change of the steel arch is also related to its own material.The analysis results can provide some references for stability analysis and construction of supporting structures.
作者
胡江春
李渊
崔力
孙发用
吉梦洁
HU Jiangchun;LI Yuan;CUI Li;SUN Fayong;JI Mengjie(School of Architecture Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China)
出处
《中原工学院学报》
CAS
2018年第4期49-52,共4页
Journal of Zhongyuan University of Technology
基金
国家自然科学基金项目(51074196
51574296)
河南理工大学深部矿井建设省重点学科开放实验室开放基金项目(2014KF-03)
河南省高等学校重点科研项目(18B560016)
关键词
偏压隧道
有限元分析
钢拱架应力
稳定分析
biased tunnel
finite element analysis
steel arch stress
stability analysis
