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Limiting jacking device for steel frame of tunnel opening and shed and its construction method

A technology of jacking device and limiting device, which is applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of inability to directly form a working surface, structural difficulties, narrow bridge deck and tunnel opening space, etc. The effect of quality shed hole construction and accurate positioning

Active Publication Date: 2022-03-25
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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AI Technical Summary

Problems solved by technology

[0003] In the area where the bridge and tunnel are connected, the space between the bridge deck and the tunnel opening is small, and it is impossible to directly form the working surface. It is difficult to directly lift the steel frame with a crane and install the auxiliary structure of the shed.

Method used

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  • Limiting jacking device for steel frame of tunnel opening and shed and its construction method
  • Limiting jacking device for steel frame of tunnel opening and shed and its construction method
  • Limiting jacking device for steel frame of tunnel opening and shed and its construction method

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Embodiment Construction

[0055] The present invention will be described in detail below in combination with specific embodiments.

[0056] The invention relates to a position-limiting jacking device for a steel frame of a shed at the entrance of a tunnel. Independent pile foundations are arranged on both sides of an existing bridge and concrete beams with pre-embedded ground anchor bolts are covered. Lay slide guides on the concrete beams, use jacks and limit devices, and cooperate with lifting supports to realize the overall in-place installation of the assembled and formed steel frame on site. Finally, the construction of the shed is completed by setting auxiliary facilities such as steel wire mesh ropes on the steel frame.

[0057] The device includes a lifting lug 1, a vertical jack 6, a lifting support 3, a concrete foundation 4 and a slide rail 5; the lifting support 3 is arranged on the surface of the concrete foundation 4, and behind it is a longitudinal slide rail 5; the steel frame body The...

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Abstract

The invention relates to a limit lifting device and a construction method for a steel frame of a shed at a tunnel entrance. The device includes a lifting ear plate, a vertical jack, a lifting support, a concrete foundation and a slide rail; The foundation surface, behind which is a longitudinal slide rail; the bottom end of the steel frame body is set on the slide rail through a limit device; the lifting lug plate is fixed to the lower side of the steel frame body, and the vertical jack is set on the lifting support and located at the lifting ear below the board. The invention makes full use of the narrow working space of the connecting section of the bridge and tunnel, and flexibly and conveniently realizes the positioning and erection of the steel frame of the shed tunnel through the guide beam of the slide rail, the limit device, the lifting support and the jack. The construction process does not need to use large-scale machinery and a large-area work site. The limit jacking device has the advantages of exquisite structure, flexible operation, and precise positioning, ensuring fast and high-quality construction of the shed.

Description

technical field [0001] The invention relates to the technical field of railway tunnel construction engineering, in particular to a limit jacking device and a construction method for a steel frame of a tunnel entrance shed. Background technique [0002] As a safe, reliable, fast and comfortable transportation mode, high-speed railway is low-carbon and environmentally friendly. Due to the requirements of disaster prevention and mitigation in the operation stage, it is necessary to erect a steel frame at the tunnel entrance and build a flexible steel wire mesh shed to prevent dangerous rockfall. protection. [0003] In the area where the bridge and tunnel are connected, the space of the bridge deck and the tunnel opening is so small that it is impossible to directly form the working surface. It is difficult to directly lift the steel frame with a crane and install the auxiliary structure of the shed. Contents of the invention [0004] The object of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/14E21D11/40
CPCE21D11/14E21D11/40
Inventor 徐冲史先伟陈海军陈霄汉
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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