既有公路隧道改扩建方案研究现状与展望

Research Status and Prospect of Reconstruction and Expansion Schemes of Existing Highway Tunnels

摘要:

随着我国经济社会的发展，现有高速公路隧道无法满足迅速增长的交通量需求，既有隧道改扩建成为提高通行能力的有效手段。通过文献检索梳理了国内近20年公路隧道改扩建方案选型发展动态，指出了原位扩建、并行扩建、组合扩建等方案的优缺点；结合公路隧道改扩建过程的各项指标，给出了对方案选型影响最大的几种指标，并介绍了其研究现状；在大量调研典型案例的基础上，总结认为单侧扩建适宜应用于大部分工程，并对几种情况给出了推荐方案。

Abstract:

With the development of economy and society in China, the existing expressway tunnels cannot meet the needs of the rapidly growing traffic volume. The reconstruction and expansion of existing tunnels have become an effective means to improve the traffic capacity. Through literature search, the development trends of highway tunnel reconstruction and expansion schemes in China in the past 20 years are sorted out, and the advantages and disadvantages of in-situ expansion, parallel expansion and combined expansion are pointed out. Combined with the indicators of the whole process of highway tunnel reconstruction and expansion, several indicators that have the greatest impact on the selection of schemes are given, and their current research status is introduced. Based on extensive research of typical cases, it is concluded that unilateral expansion is suitable for the most projects, and the recommended solutions are also given for several situations.