摘要
依托南昌地铁1号线侧穿某建筑物,利用ABAQUS有限元软件三维建模,分析盾构隧道与建筑物不同间距及隧道不同埋深情况下,建筑物对隧道衬砌内力的影响。结果表明,隧道与建筑物不同间距及隧道埋深不同情况下,衬砌弯矩均在衬砌环向30°和120°及其径向相对点弯矩增长率最大,而衬砌环向60°和150°及其径向相对点呈现负增长率。随间距增大,衬砌弯矩及轴力增长率均逐渐减小,当水平间距达到3.0D时衬砌弯矩及轴力增长率基本趋于0;随埋深增大,衬砌弯矩及轴力增长率均逐渐减小,当埋深达到3.0D时衬砌轴力增长率小于5%。
With reference to Nanchang Metro Line 1 passing alongside of a building,a three-dimensional model is established based on ABAQUS finite element software to analyze the influence of buildings on the internal force of tunnel lining in terms of different spacing between the tunnel and the building and different cover depth of the tunnel. The results show that with different spacing and depth,the growth rate of bending moment of the lining is the largest at 30°,120° and its radial relative point,while the growth rate is negative at 60°,150° and its radial relative point. With the increase of spacing,the bending moment and axial force growth rate of lining decrease gradually. The bending moment and axial force growth rate tend to be 0,when the horizontal spacing reaches 3. 0 D. With the increase of the cover depth,the bending moment and axial force growth rate of the lining decrease gradually. The axial force growth rate of the lining is less than 5%,when the cover depth of reaches 3. 0 D.
出处
《铁道标准设计》
北大核心
2017年第12期69-72,83,共5页
Railway Standard Design
基金
国家重点基础研究发展计划(973计划)(2015CB057801)
江西省岩土工程基础设施安全与控制重点实验室科研课题(20161BCD40010)
关键词
衬砌内力
建筑物
盾构隧道
埋深
间距
Lining internal force
Building
Shield tunnel
Cover depth
Spacing
