Grade separation structure of underground tunnel or underwater tunnel

Abstract

The invention belongs to the field of road traffic design and provides a grade separation structure of an underground tunnel or an underwater tunnel. Opposite-direction lanes of a second road section are separated from each other. Respectively taking a first exit and entrance and a second exit and entrance, at two ends of the second road section, as starting points, a first ramp is arranged adjacent to a corresponding lane to the left of the first ramp lanes and a second ramp is arranged adjacent to a corresponding lane to the left of the second ramp lanes; after crossing over a first road section, the first ramp and the second ramp are connected to the first road section by corresponding arc ramps. Respectively taking a third exit and entrance and a fourth exit and entrance, at two ends of the first road section, as starting points, a third ramp is arranged adjacent to a corresponding lane to the left of the third ramp and a fourth ramp is arranged adjacent to a corresponding lane to the left of the fourth ramp; after crossing over a lane of the second road section, the third ramp and the fourth ramp are respectively communicated with an opposite-direction lane of the second road section by corresponding arc ramps. The grade separation structure of the urban underground tunnel or the urban underwater tunnel provided by the invention has the advantages of simple structure form, small quantity of road bifurcations (18 times of bifurcating), less overlapping layers, simple design and small construction excavation quantity.

Description

technical field [0001] The invention belongs to the field of road traffic design, in particular to an underground / underwater tunnel three-dimensional intersection structure. Background technique [0002] In recent years, many large and medium-sized cities, especially some cities that are separated by geographical barriers (such as rivers and mountains) and form a "one city with multiple centers" development pattern, have more and more underground roads crossing rivers and mountains. [0003] As an inevitable product of the development of urban underground roads, underground / underwater interchanges have the advantages of not affecting ground traffic, saving ground land resources, protecting environmental landscapes, and realizing rapid conversion of traffic flows between underground roads. Underground interchanges are adopted more and more projects. At the same time, the underground / underwater interchange also has certain limitations that need to be resolved urgently, mainly...

AI Technical Summary

Problems solved by technology

[0004] (1) Most of the underground / underwater interchanges are located in the core area of ​​the city, the surface buildings are highly dense, the terrain and geological conditions are complex, and the selection of the type and location of the interchange scheme is limited;

[0005] (2) The complexity of construction and the risk of construction are relatively high, and the general cost is relatively high;

[0006] (3) Disaster prevention and safety requirements are relatively high in the future operation process, and there are certain hidden safety hazards;

[0007] (4) During the construction period, the impact on ground traffic and local nodes is large, and the impact period is long

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