摘要
采用交叉中隔墙(CRD)法,开挖红土地层中双线铁路隧道.通过现场量测和ANSYS有限元模拟相结合的方法,研究开挖过程中隧道的拱顶沉降、弯矩和支护轴力的变化规律.研究结果表明:CRD1开挖产生的拱顶沉降约占整体沉降为36%,拱顶下沉曲线通常为最后趋于收敛的非线性上升曲线;CRD1开挖产生的轴力约占最终轴力的42%～49%,整个开挖过程中结构的轴力基本呈非线性增大趋势.
A double-track railway tunnel in laterite was constructed by center cross diaphragm（CRD） method.Based on both the tested in-situ data and numerical results by ANSYS software,the variation of vault subsidence,bending moment and axial force during the excavation was studied.The results show that the vault settlement caused by excavation section 1 is about 36% of whole subsidence,and the axial force caused by excavation section 1 is about 42%~49% of the final axial force,the vaults subsidence increases and converges finally with time.During excavation,the axial force increases nonlinearly.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2013年第1期87-91,共5页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(2011053035)
湖南省自然科学基金资助项目(20114195)
湖北理工学院青年基金资助资目(12XJZ36Q)
关键词
交叉中隔墙法
红土地层
拱顶沉降
轴力
弯矩
center cross diagram method
vault subsidence
laterite
axial force
bending moment
