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Construction method for demolishing arch ribs of concrete-filled steel tube arch bridges with dumbbell-shaped cross-section

A technology of steel pipe concrete and construction methods, which is applied in the direction of arch bridges, bridges, bridge forms, etc., can solve the problems of high cost, high risk, and high design requirements for oblique buckle-hanging systems, and achieve the goal of reducing construction costs, construction risks, and design requirements Effect

Active Publication Date: 2022-05-17
陕西交控通宇交通研究有限公司 +1
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Problems solved by technology

[0004] The invention provides a construction method for demolishing the arch rib of a concrete-filled steel tube arch bridge with a dumbbell-shaped cross section, which solves the problems of high design requirements, high cost, and high risk for the oblique buckle system when the concrete-filled steel tube arch bridge is demolished in the related art

Method used

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  • Construction method for demolishing arch ribs of concrete-filled steel tube arch bridges with dumbbell-shaped cross-section
  • Construction method for demolishing arch ribs of concrete-filled steel tube arch bridges with dumbbell-shaped cross-section
  • Construction method for demolishing arch ribs of concrete-filled steel tube arch bridges with dumbbell-shaped cross-section

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specific Embodiment 1

[0027] Specific embodiment one, such as Figure 1-Figure 5 As shown, the construction method for demolition of the arch rib of the steel tube concrete arch bridge with dumbbell-shaped section is applied to the removal of the arch rib of reinforced concrete bridge with dumbbell-shaped section. The cross-sectional view of the arch rib of this kind of bridge is shown in figure 1 As shown, the upper tube 1 and the lower tube are connected together through the trim plate 3 , the upper tube 1 is located above the lower tube 2 , and the trim plate 3 is located in the middle of the upper tube 1 and the lower tube 2 .

[0028] In this arch rib removal construction method, the lower tube of the dumbbell-shaped structure is used as a support, the upper tube and the panel are removed to reduce the self-weight of the arch rib, and then the lower tube is removed according to the cable-stayed buckle-hanging method, thereby completing the demolition of the arch rib.

[0029] The concrete cons...

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Abstract

A construction method for demolishing arch ribs of steel tube concrete arch bridges with dumbbell-shaped cross-sections, comprising the following construction steps: removing the bridge deck system and main girders according to the reverse order of the original construction process; installing arch rib construction platforms and cable hoisting systems; Cut the upper pipe and panels in sections, and use the cable hoisting system to remove them section by section; Segment cutting and hoisting away for demolition. Use the lower tube of the dumbbell-shaped concrete-filled steel tube arch bridge as a bracket to remove the upper tube in sections, and then install the cable-stayed buckle-hanging system to remove the lower tube, reducing the self-weight of the arch rib by 50%, reducing the design requirements of the cable-stayed buckle-hanging system and reducing construction costs and construction risks.

Description

technical field [0001] The invention relates to the technical field of demolition of arch bridges, in particular to a construction method for demolition of arch ribs of steel tube concrete arch bridges with dumbbell-shaped sections. Background technique [0002] The concrete-filled steel tube arch bridge is a new type of arch bridge technology developed in the 1990s. It utilizes the mechanical properties of steel tubes and concrete, and has excellent characteristics such as high bearing capacity, strong spanning capacity, good seismic performance, and convenient construction. [0003] When the bearing capacity of the CFST arch bridge is degraded, the traffic requirements are not satisfied, or the blasting method cannot be used for environmental or other reasons, it is often necessary to adopt the reverse demolition method opposite to the original construction process. For concrete-filled steel tube arch bridges, the concrete inside the tubes has already been formed, which is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D24/00E01D4/00E01D101/24
CPCE01D22/00E01D4/00E01D2101/268
Inventor 魏家乐
Owner 陕西交控通宇交通研究有限公司
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