Analysis About Road Tunnel Design

Abstract: The road tunnel is playing a very significant role in improving the standard of highways, protecting ecology environment and increasing the efficiency of operating. And the design of road tunnels is the key to success. This essay will do the technical analysis from the tunnel entrance, tunnel structure and the design points of waterproof system.

Keywords: road tunnel waterproof system Technical analysis

With the constructions of highways, especially the rapid development of the road tunnel, the number and length of the road tunnel is increasing, and the problems of design and construction that need to be studied and explored is gradually apparent. This article wills shallowly analysis from a design perspective in a few questions.

1 The overall design principles

Based on the conservatories, geological, landscape, social cultural and environmental’ comprehensive survey, combining the position of the tunnel’s axis plan, the plane and vertical line and the position of holes, then propose the best program,.

The position of specialty long tunnels should control the direction of the routes while the geological environment conditions are very poor to avoid from the bad geological sections of route. The positions of longer tunnels not only should avoid the bad sections as possible as they can ,too, but also should consider the direction of the route, The less longer and short tunnels can submit to the direction of the route.

The boundaries of traffic lanes and buildings are defined by the road grade and designing speed. Guarantee to satisfy the tunnel’s function and the structure’s good force, determine the economical and legitimate internal outline of cross sections.

The flat, vertical alignment to both the inside and outside of the tunnel should be coordinated to meet the traffic safety and comfort requirements.

According to the tunnel length, traffic volume and composition, direction of traffic and environmental requirements, choose a reasonable ventilation, to determine the set scale of the ventilation, lighting, traffic control and electrical facilities.

Long tunnel, when necessary, should be designed for defending disaster.

The highway grade, tunnel length, construction methods, schedule and operational requirements, both inside and outside the tunnel waterproofing and