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抗拔桩对隧道主体结构的影响分析 被引量:8

Analysis for Effect of Uplift-Pile Major on Major Structure of Tunnel
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摘要 以南京市纬三路长江隧道工程明挖段抗浮设计典型节段为背景,建立了考虑抗拔桩作用的隧道主体结构三维板壳-弹簧有限元模型,分析了其计算原理、计算参数选取原则及荷载确定方法,并论证了模型用于实际工程的合理性。在此基础上,通过对抗拔桩作用效果的初步讨论,将抗拔桩等效为大刚度的非线性拉压弹簧以体现其对主体结构的约束支承效果。最后进行计算分析并研究了抗拔桩对主体结构受力及变形特征的影响和抗拔桩的轴力分布规律。 Taking the anti-floating design of the typical open excavation section of the crossing river underwater tunnel in Nanjing Weisan Road as the engineering background, the 3D plate and shell-spring finite element model of the major structure of tunnel considering uplift piles effect is established and the calculation principle, parameters choice, load determining are analyzed, On this basis, by preliminary discussion of the uplift pile effect, taking the uplift pile as equivalent to large-stiffness nonlinearity spring to reflect the bearing constraint effect to the major struc- ture. At last, by the calculation analysis, the reflection of the uplift pile to the force and deformation characteristics and the axial force distribution of the uplift pile are studied.
出处 《地下空间与工程学报》 CSCD 北大核心 2011年第1期93-98,111,共7页 Chinese Journal of Underground Space and Engineering
关键词 三维板壳-弹簧有限元模型 抗拔桩 抗浮设计 拉压弹簧 three-dimensional shell-spring finite element model uplift-pile anti-floating design compression- tenston spring
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