大断面隧道仰拱底鼓破坏模式探析

Discussion on the Failure Mode of Inverted Arch Bottom Heave in Large Cross-Section Tunnels

为了提升隧道的设计水平,分析了大断面隧道仰拱底鼓的影响因素,基于薄板压曲微分方程推导了仰拱底鼓临界平衡公式。随后,依托某高速公路隧道,利用ABAQUS软件建立有限元模型,探讨了大断面隧道底鼓的破坏过程和变形机理,同时提出了大断面隧道在施工和运营期间的仰拱底鼓控制措施。

In order to improve the design level of tunnels,the influencing factors of the inverted arch bottom heave in large cross-section tunnels were analyzed,and the critical equilibrium formula of the inverted arch bottom heave was derived based on the differential equation of thin plate bending.Subsequently,relying on a certain highway tunnel,a finite element model was established using ABAQUS software to explore the failure process and deformation mechanism of the large section tunnel bottom heave.At the same time,measures for controlling the inverted arch bottom heave ofthelarge section tunnel during construction and operation wereproposed.