邻近建筑物对盾构隧道衬砌内力影响分析

发布时间：2018-04-05 21:32

本文选题：衬砌内力　切入点：建筑物　出处：《铁道标准设计》2017年12期

【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%。
[Abstract]:Based on the lateral penetration of Nanchang Metro Line 1 through a building, the influence of the building on the internal force of the tunnel lining is analyzed under the condition of the different spacing between the shield tunnel and the building and the different buried depth of the tunnel by using the ABAQUS finite element software.The results show that the moment growth rate of lining moment is the largest at 30 掳and 120 掳and radial relative moment of lining, but negative growth rate of 60 掳, 150 掳and radial relative point of lining is observed under different spacing between tunnel and building and different buried depth of tunnel.With the increase of spacing, the growth rate of bending moment and axial force of lining decreases gradually. When the horizontal spacing reaches 3.0D, the growth rate of lining moment and axial force tends to be 0, and the growth rate of lining bending moment and axial force decreases gradually with the increase of buried depth.When the buried depth reaches 3.0 D, the axial force growth rate of the lining is less than 5.
【作者单位】：江西省岩土工程基础设施安全与控制重点实验室华东交通大学;杭州市城东新城建设投资有限公司;浙江大学滨海和城市岩土工程研究中心;
【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)
【分类号】：U455.43

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