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Rapid construction method for tunnel located at bridge and tunnel connected segment

A construction method and technology for tunnels, which are applied to tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems that the construction site cannot meet the construction requirements, it is difficult to build construction access roads, and the slope of the tunnel entrance is steep, so as to overcome the lack of construction space, The effect of saving construction resources and the method is simple and practical

Inactive Publication Date: 2019-02-15
CHANGAN UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Mountain tunnels are usually constructed from the entrance of the tunnel under the support of large pipe sheds in advance. However, the uphill slope at the entrance of the tunnel connected by the bridge and tunnel is steep, making it difficult to build a construction access road; or the construction site is limited and cannot meet the construction requirements, and the excessive fill Excavation will destroy the ecological environment, so more effective hole drilling methods are needed to ensure safe, environmentally friendly and economical hole construction

Method used

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  • Rapid construction method for tunnel located at bridge and tunnel connected segment
  • Rapid construction method for tunnel located at bridge and tunnel connected segment
  • Rapid construction method for tunnel located at bridge and tunnel connected segment

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Embodiment Construction

[0024] The construction steps are described in detail below in combination with graphics. A rapid construction method for tunnels in bridge-tunnel connecting sections, such as figure 1 As shown, the entrance of the main tunnel of the tunnel in the figure refers to the entrance of the tunnel at the bridge-tunnel junction, and the tunnel exit refers to the direction opposite to the tunnel entrance.

[0025] The first step, cross the hole into the hole

[0026] Survey the topography and geology around the tunnel, and select the position of the tunnel’s transverse opening; the position of the selected tunnel’s transverse opening intersecting the main opening is not less than 50m from the entrance of the tunnel’s main opening, and the angle between the centerline of the horizontal opening and the main opening is not less than 60° °; such as figure 1 As shown, in the preferred embodiment of the present invention, the horizontal hole and the normal hole are vertically intersected. ...

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Abstract

The invention discloses a rapid construction method for a tunnel located at a bridge and tunnel connected segment. The rapid construction method for the tunnel located at the bridge and tunnel connected segment comprises the following steps that an entrance of a construction transverse hole is selected to enter the hole; transverse hole excavation and transverse hole intersection main hole construction are carried out; left line main hole bi-directional excavation construction is carried out; vehicle travelling transverse hole construction is carried out; and right-line main hole bi-directional excavation construction is carried out. Through a mode of excavating the transverse holes to enter the main hole, then the bi-directional excavation is carried out on the main hole, hole exiting iscarried out assisted by a double-row advanced small guide pipe mode, the defects of insufficient cliff construction space in the prior art and mutual interference of a bridge and a tunnel are overcome, and the rapid construction method for the tunnel located at the bridge and tunnel connected segment has the advantages of low construction costs, short construction period, safety and reliability and high efficiency.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a rapid construction method for a tunnel at a connecting section of a bridge and a tunnel. Background technique [0002] With the rapid development of my country's transportation industry, more and more roads and railways are built in mountainous areas. The terrain in mountainous areas is complex and the terrain undulates greatly, so it is inevitable to build bridges and tunnels. For general mountain terrain, bridges and tunnels can be built alone, but for areas with large ups and downs, bridges and tunnels are often connected to ensure the linear index of the route. The construction of bridges and tunnels in the bridge-tunnel connection section is very difficult because there is not enough construction space for both. [0003] Mountain tunnels are usually constructed from the entrance of the tunnel under the support of an advanced large pipe shed. However, the upward slope of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/14
CPCE21D9/008E21D11/14
Inventor 罗刚张玉龙潘少康贾航航刘贤旺
Owner CHANGAN UNIV
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