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Air duct and tunnel combined construction structure suitable for double-hole extra-long tunnel, and construction method

A technology for tunnels and air ducts, which is applied in the field of air duct and tunnel joint construction and construction, can solve the problems of large longitudinal slope of the main line tunnel air duct, reduce construction risks, and high construction risks, so as to speed up the construction progress and reduce the construction difficulty. and risk, reducing the effect of project investment

Pending Publication Date: 2021-08-17
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is urgent to find a new structural form to reduce the longitudinal slope of the air duct and reduce construction risks in view of the characteristics of large longitudinal slope, high construction risk and great difficulty in the main tunnel away from the side of the underground fan room.

Method used

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  • Air duct and tunnel combined construction structure suitable for double-hole extra-long tunnel, and construction method
  • Air duct and tunnel combined construction structure suitable for double-hole extra-long tunnel, and construction method

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with specific embodiments, so that those skilled in the art can understand.

[0031] like Figure 1~2 The air duct and tunnel joint construction structure suitable for double-hole ultra-long tunnels shown includes four parts: underground fan room 1, air duct 2, joint tunnel 3, and far side main line tunnel 4; one side of the underground fan room is connected by a tunnel Inclined shaft A, the other side is connected to the joint tunnel 3 through the air duct 2; the joint construction tunnel 3 is connected to the far side main line tunnel 4 through the air duct 2.

[0032] The joint tunnel 3 is longitudinally connected to the proximal main line tunnel 5 respectively, and the longitudinal length of the joint tunnel exceeds the width of the air duct by 10m.

[0033] The net distance between the underground fan room 1 and the joint tunnel 3 is 5 times the excavation span of the joint tunnel.

[...

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Abstract

The invention relates to the technical field of mountain tunnel engineering, and especially relates to an air duct and tunnel combined construction structure suitable for a double-hole extra-long tunnel, and a construction method. The air duct and tunnel combined construction structure comprises four parts, that is, an underground fan room, an air duct, a combined construction tunnel and a far-side main line tunnel, wherein one side of the underground fan room is connected with an inclined shaft or a vertical shaft in a tunnel form, and the other side of the underground fan room is connected with the combined construction tunnel through the air duct; and the combined construction tunnel is connected with the far-side main line tunnel through the air duct. The structure can meet the requirement for tunnel ventilation, and realize synchronous excavation and synchronous construction for the air duct and the tunnel, so that the construction efficiency is increased. According to the invention, the construction difficulty and risk for the air duct can be reduced, the construction progress for the air duct is accelerated, and the project investment is reduced. Meanwhile, equipment required by the structure is simple, and the structure is convenient to construct and mature in technology, and can be used for air duct design for an extra-long mountain tunnel.

Description

technical field [0001] The invention relates to the technical field of mountain tunnel engineering, in particular to an air duct and tunnel combined structure and construction method suitable for double-hole super-long tunnels. Background technique [0002] With the rapid development of expressways in my country, expressways gradually extend to mountainous areas. Due to the particularity and complexity of the geological structure in mountainous areas, the number of expressway tunnels in mountainous areas continues to increase. According to statistics, by the end of 2019, the number of highway tunnels in my country was 19,067 , the total length of the tunnels reached 18.9666 million meters, of which the number of extra-long tunnels increased to 1175, and the length reached 5.2175 million meters; at present, the longest highway tunnel in my country that has been completed and operated is the Qinling Zhongnanshan Tunnel (18.02km), and the longest under construction The highway tu...

Claims

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Application Information

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IPC IPC(8): E21F1/00E21D11/10E21D11/00E21D9/14
CPCE21D9/14E21D11/00E21D11/10E21F1/003
Inventor 陈寿堂张峥陈容文郭晓刚龙敏朱敏夏磊陈飞
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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