高速铁路交叉隧道动力学问题研究综述

Dynamics Issues Regarding High-Speed Railway Crossing Tunnels

文章针对高速铁路交叉隧道的分类和组合型式进行划分,分别阐述了其存在的关键动力学问题,并通过广泛的相关文献调研,总结了高速铁路交叉隧道在列车振动、空气动力效应以及地震震动等方面的研究现状与不足;指出了今后的研究重点:(1)考虑隧道结构、地层参数以及邻近交叉隧道的结构特征,建立高速列车-轨道-交叉隧道为一体的三维精细化分析模型,并用其开展定量安全评价;(2)开展车隧气动结构效应研究,提出保障隧道结构安全的工程措施,进而建立考虑列车气动荷载与其他动力荷载叠加作用下交叉隧道的安全性评估方法;(3)进行全方位的高速铁路交叉隧道地震动力响应研究,揭示交叉隧道结构本身的动力特性,提出相适应的抗震设计方法;(4)引入混凝土和岩石动力损伤本构关系,建立能考虑材料动态损伤的计算模型,以对结构在长期反复动力作用下的动力响应特性及其累积损伤效应开展深入研究。

In this paper, key dynamics problems regarding crossing tunnels on high-speed railways are present- ed based on their classification and combination, and the current state and existing problems of research on train vibration, aerodynamic effects, seismic shock, etc. are summarized. This study indicates that future re- search should focus on the following： 1） a quantitative safety assessment using a 3D train-track-crossing tunnel model and considering the strata parameters and the structures of the cross-linked tunnels; 2） train-tunnel aero- dynamic research for providing safe construction measures and tunnel safety assessments under the superposition of aerodynamic load and other loads; 3） seismic response research for providing the dynamic characteristics of crossing tunnels and relevant aseismic design schemes; and 4） the establishment of a calculation model considering rock dynamic damage and its constitutive relationship with concrete.