长大公路隧道断面形式的比较研究

西南科技大学本科生毕业论文

I 长大公路隧道断面形式的比较研究

摘要:随着现代化建设的快速发展，我国公路建设事业的规模越来越大。交通基础设施的建设就显得由为重要。我国在公路和铁路的发展是相对不平衡的，从目前来看，我国的公路建设还远远落后于铁路的建设，因此我国现在对公路建设的投入是越来越大，规划的里程也越来越多。而相对于隧道而言，我国对公路隧道的研究也较落后于铁路隧道。我国公路隧道的发展更是较晚，相比于其他的发达国家还有很大的差距。但随着我国对公路建设的不断投入，公路隧道也就将有很大的发展和改进。

我国有三分之二的土地是山地或重丘地形，由此看来，我国公路建设对隧道的要求也是越来越大。那么在隧道的修建中合理的隧道断面形式将对隧道的建设起着十分重要的作用。合理的隧道断面可以减少投资，缩短施工工期，有利于保护环境等优点。目前在我国隧道断面形式的选择上，主要有两种形式分别是连拱隧道和小净距隧道。而各种隧道断面形式有其自身的优点和缺点。而公路隧道单洞的断面形式又有圆形、拱形和椭圆形等。因此，在公路隧道断面的选择上，要结合多方面的因素，选择出适应地质条件和规范要求的合理的断面形式。

本文针对隧道断面形式进行研究，详细阐述了各种断面形式的优缺点，并结合各种隧道的施工工艺对各种隧道的断面形式进行了比较研究。如公路连拱隧道与小净距隧道的比较，隧道单洞的断面形式的比较研究。

关键词:长大公路隧道横断面圆曲线椭圆曲线非独立双洞隧道线形参数

西南科技大学本科生毕业论文

II Long highway tunnel section of the Comparative Study Abstract：With the modernization of rapid development, The construction of chinese highway is growing in the scale. The construction of transport infrastructure is very important. The development of Chinese road and rail is relatively uneven, from the current situation, Chinese highway construction has lagged far behind the railway construction, The investment of chinese road construction is increasing now, more and more milestone is planning. in relation to the tunnel, The research of Chinese highway tunnel has lagged far behind a railway tunnel. compared to other developed countries, The development of Chinese highway tunnel is late. But as the construction of Chinese highway on the constant input, highway tunnels will also have great development and improvement.

The two-thirds of chinese land is mountainous terrain or re-Hill.From now on, the request of the tunnel on Chinese highway construction is growing. Then the reasonable cross-section of the tunnel construction will play a very important role on the construction of the tunnel. Reasonable cross-section of the tunnel could reduce investment, reduce the construction period and raise rotection of the environment, etc. Currently the section of the tunnel option in china, there are two main forms ,arch tunnel and the tunnel on the Net Space. And various forms of the tunnel section has its own advantages and disadvantages. The highway tunnel section of the single-round there are roundness,oval and so on. Therefore, the cross-section of the highway tunnel option, it is necessary to integrate various factors, the choice to adapt to geological conditions and regulatory requirements of a reasonable cross-section form.

This thesis study the tunnel section , elaborate the advantages and disadvantages of various sections, and comparatively study various sections of the tunnel form with combination of the tunnel construction process .If the contrast of Highway arch tunnel and Small Net Space Tunnel, Comparative Study of the tunnel section of the single-A form.

Key words：long highway tunnel ,cross-sectional ,round, elliptic ,non-independent double-tunnel ,alignment parameters