Underground interchange bifurcate tunnel underground excavation structure

A technology for tunnels and interchanges, applied in tunnels, mining equipment, earth-moving drilling, etc., can solve the problems of inability to realize and increase the difficulty of underground interchange construction, and achieve the effect of reducing the risk of construction

Inactive Publication Date: 2017-06-27
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the design of conventional underground interchanges, if the difficulty of open-cut engineering can be adopted, the difficulty will be greatly reduced. When factors such as ground traffic are affected, when underground excavation construction must be adopted, the construction difficulties of underground interchanges will be greatly increased or even impossible to realize. The present invention proposes an underground interchange The underground excavation structure during the construction of the bifurcation tunnel greatly reduces the difficulty of the project and is more conducive to the development needs of future urban underground space development

Method used

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  • Underground interchange bifurcate tunnel underground excavation structure
  • Underground interchange bifurcate tunnel underground excavation structure
  • Underground interchange bifurcate tunnel underground excavation structure

Examples

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Embodiment 1

[0030] like figure 1 As shown, when the number of roadways of the branch tunnel of the underground interchange is less or when the geological conditions are better, the underground excavation structure of the branch tunnel of the underground interchange of the present invention includes at least one grade of gradual change section whose cross-section width gradually becomes larger, and the last The largest section section 5 of the large-span tunnel connected by the first-level gradual change section, the small clear distance tunnel section 7 and the separated tunnel section 8; the middle of the small clear distance tunnel section 7 and the separated tunnel section 8 is provided The reserved middle rock pillar 10 of the bifurcation; one end of the small clear distance tunnel section 7 after the bifurcation is connected with the largest section section 5 of the long-span tunnel; the separated tunnel section 8 after the bifurcation is correspondingly connected to the small clear d...

Embodiment 2

[0037] like Figure 4 As shown, the difference between the present embodiment and the first embodiment is that the tunnel excavation structure of the branch tunnel of the underground interchange is also provided with a multi-arch tunnel section 6, and a central section for branching the tunnel is provided in the middle of the multi-arch tunnel section. A partition wall; one end of the bifurcated small clearance tunnel section is connected to the multi-arch tunnel section; one end of the bifurcated multi-arch tunnel section is connected to the largest section section of the long-span tunnel. Specifically, the multi-arch tunnel section 6 is set between the largest section section 5 of the long-span tunnel and the small-clear distance tunnel section 7, and the middle of the multi-arch tunnel section 6 is also provided with the reserved middle The middle wall structure 9 connected by rock pillars 10, the thickness of the middle wall structure 9 is set in a gradually increasing gra...

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Abstract

The invention relates to an underground interchange bifurcate tunnel underground excavation structure which comprises at least one grade of transition segment with the section width gradually increased, a large-span tunnel maximum-section segment connected with the last grade of transition segment, a multi-arch tunnel segment, a small-distance tunnel segment and a separated tunnel segment. A reserved middle rock pillar bifurcating a tunnel is arranged between the small-distance tunnel segment and the separated tunnel segment. A middle partition bifurcating the tunnel is arranged in the middle of the multi-arch tunnel segment. One end of the bifurcated small-distance tunnel segment is connected with the multi-arch tunnel segment. One end of the bifurcated multi-arc tunnel segment is connected with the large-span tunnel maximum-section segment. The bifurcated separated tunnel segment is connected with the other end of the small-distance tunnel segment correspondingly. Compared with the prior art, according to the underground interchange bifurcate tunnel underground excavation structure, through conversion and transition of various tunnel section structures, bifurcation of the underground interchange tunnel is achieved, and the underground interchange bifurcate tunnel underground excavation structure is particular suitable for design and application of an urban underground interchange road.

Description

technical field [0001] The invention relates to the technical field of underground road structure design in the technical field of municipal engineering, in particular to an underground excavation structure of an underground interchange bifurcation tunnel. Background technique [0002] With the development of urban construction, the functional requirements of urban underground roads are getting higher and higher, especially in the central area of ​​the city. Due to the limitation of land use and ground transportation, underground roads can only be set up to meet the needs of social development. At the same time, it is necessary to consider the diversion and connection of traffic in multiple directions, and the form of underground interchange came into being. During the design of conventional underground interchanges, if the difficulty of open-cut engineering can be adopted, the difficulty will be greatly reduced. When factors such as ground traffic are affected, when undergr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14
CPCE21D9/14
Inventor 朱道建
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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