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Cross-line protection structure and installation method of highway bridge widening and reconstruction project

A technology for highway bridges and protective structures, which is used in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of long construction period and many hidden safety hazards, and achieve the effects of low cost, high safety and rapid construction.

Active Publication Date: 2017-01-04
CHINA RAILWAY NO 5 ENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a cross-line protection structure for highway bridge widening and reconstruction projects, so as to overcome the shortcomings of the existing technology such as long construction period and many potential safety hazards

Method used

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  • Cross-line protection structure and installation method of highway bridge widening and reconstruction project
  • Cross-line protection structure and installation method of highway bridge widening and reconstruction project

Examples

Experimental program
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Embodiment Construction

[0010] Embodiments of the invention:

[0011] When the expressway expansion project is constructed across the railway 7, the prefabricated slab girder 1 of the widened bridge is first erected and combined with the existing bridge superstructure 2 to form a safe and reliable operation platform. Lay 2cm thick wooden planks 3 on the work platform to connect the widened bridge prefabricated slab girder 1 and the existing bridge superstructure 2 into a closed whole, lay a layer of waterproof cloth 4 on the 2cm thick wooden planks 3, and set a mortar barrier on the waterproof cloth 4 Water sill 5, a temporary protective fence 6 with a height of 1.2m is set on the outer edge of the prefabricated slab girder 1 of the widened bridge.

[0012] The 6 poles of the protective fence are made of D=50mm steel pipes, and the upright poles are firmly welded with the pre-embedded steel bars of the beams. The distance between the poles is 1m. There are two horizontal connecting rods between the p...

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Abstract

The invention discloses a highway bridge broadening modification project overpass protection structure. In railway overpass construction (7) of the highway expansion projection, broadening bridge precast beams (1) are erected on and jointed with the outer sides of an upper structure (2) of an existing bridge of an overpass section, and an integral operation platform is formed at the jointing positions of the tops of the broadening bridge precast beams (1) and the upper structure (2) of the existing bridge. Wooden plates (3) are laid on the operation platform, and are covered by waterproof cloth (4), and mortar water-stop ridges (5) are arranged on the waterproof cloth (4). Temporary guard fences (6) are arranged at outer edges of the broadening bridge precast beams (1). The highway bridge broadening modification project overpass protection structure has the advantages of short road-closure time, high construction speed, low cost and high safety.

Description

technical field [0001] The invention relates to a protective structure for a highway bridge widening and reconstruction project spanning an existing electrified railway. Background technique [0002] At present, when the expressway expansion project crosses the railway construction, the method of erecting a protective scaffold is used for construction. This kind of construction speed is slow, the construction period is long, the cost is high, and there are many safety hazards, which often affect the construction period and the safety of existing roads. Especially It is especially obvious when the construction is limited by the clearance under the bridge. [0003] Therefore, in order to avoid the above-mentioned problems, it is necessary to provide a new highway bridge widening and reconstruction project protection structure to overcome the defects in the prior art. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00
Inventor 张建春周金桥余嘉勤
Owner CHINA RAILWAY NO 5 ENG GRP
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