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Method for reducing disadvantageous temperature effect on main girder structure of bridge and deck pavement structure

A technology of temperature effect and bridge deck pavement, which is applied to bridges, bridge parts, bridge construction, etc., can solve the problems of increasing construction cost and unfavorable gradient temperature effect, so as to reduce construction cost, reduce gradient temperature load, and reduce the weight of the beam body. Reduced effect

Active Publication Date: 2009-11-18
刘其伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to invent a method of lowering the bridge girder structure in view of the increase in construction cost and the inability to fundamentally solve the problems caused by the unfavorable gradient temperature effect due to the fact that the gradient temperature is generally used as the design load in the existing bridge design to design the bridge girder structure. The method of the unfavorable gradient temperature effect of the main girder structure, and at the same time provide a new bridge deck pavement structure to reduce the stress of the bridge main girder structure affected by the heat transfer of the bridge deck as much as possible

Method used

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  • Method for reducing disadvantageous temperature effect on main girder structure of bridge and deck pavement structure
  • Method for reducing disadvantageous temperature effect on main girder structure of bridge and deck pavement structure
  • Method for reducing disadvantageous temperature effect on main girder structure of bridge and deck pavement structure

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Effect test

Embodiment 1

[0060] Such as Figure 1-7 shown.

[0061] A method of reducing adverse temperature effects on bridge girder structures by at least one of the following methods:

[0062] (1) add heat-insulating material in the waterproof concrete layer on the surface, so that form the pavement layer 7 with heat-insulating waterproof concrete on the bridge girder structure 1 top surface; figure 1 shown.

[0063] (2) Pave a layer of temperature insulation layer 4 composed of pressure-resistant materials between the main beam structure 1 of the bridge and the waterproof layer 2, so as to reduce or block the transfer of heat from the surface concrete pavement layer to the main beam structure 1 of the bridge ;Such as figure 2 shown.

[0064] (3) Add heat insulating material to the waterproof layer between the bridge girder structure 1 and the concrete pavement layer 3, so as to form a barrier between the bridge girder structure and the concrete pavement layer that can reduce or block heat tra...

Embodiment 2

[0071] Such as figure 2 shown.

[0072] A bridge deck pavement structure for reducing the unfavorable temperature effect of a bridge girder structure, comprising a waterproof layer 2 and a concrete pavement layer 3 successively paved on a concrete bridge girder structure 1, and a waterproof layer 2 and a bridge girder structure 1 Between the waterproof layer 2 and the concrete pavement layer 3 there is a temperature insulation layer 4 at the same time or separately, the thickness of the temperature insulation layer 4 is 1-100mm, and the thermal conductivity is not greater than 0.8W / m·k.

[0073] During specific implementation, in order to improve the heat insulation effect, the heat insulation material that forms the heat insulation layer 4 can also be mixed in the concrete pavement layer 3 or the waterproof layer 2, such as figure 1 , 3 As shown, the amount of mixing can be less than the amount of materials used in the above-mentioned temperature insulation layer 4, and ca...

Embodiment 3

[0076] Such as Figure 5 shown.

[0077] A bridge deck pavement structure for reducing the unfavorable temperature effect of a bridge girder structure, comprising a concrete leveling layer 5, a waterproof layer 2 and an asphalt concrete pavement layer 6 sequentially paved on a concrete bridge girder structure 1, wherein:

[0078] (a) between the asphalt concrete pavement layer 6 and the waterproof layer 2;

[0079] (b) Between the waterproof layer 2 and the concrete leveling layer 5;

[0080] (c) Between the bridge girder structure 1 and the concrete leveling layer 5;

[0081] At least one of the above (a), (b) and (c) is provided with a temperature insulation layer 4, the thickness of the temperature insulation layer 4 is 1-100mm, and the thermal conductivity is not greater than 0.8W / m·k.

[0082] Same as above, in order to improve the heat insulation effect during specific implementation, at least one of the three of the asphalt concrete paving layer 6, waterproof layer 2...

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Abstract

The invention relates to a method for reducing disadvantageous temperature effect on a main girder structure of a bridge and a deck pavement structure. The method is characterized by increasing a thermal insulation material layer between pavement layers or adding corresponding thermal insulation materials into each pavement layer to reduce or block the heat transfer between the main girder structure of the bridge and the deck. The method can reduce the gradient temperature loads of the main girder structure of the bridge, reduce the construction or maintenance cost of the bridge, and prolong the service life of the bridge structure.

Description

technical field [0001] The present invention relates to a bridge structure, especially a method for reducing the gradient temperature effect of the main girder structure and a bridge deck pavement structure, specifically a method for reducing the unfavorable gradient temperature effect of the bridge main girder structure and the bridge deck pavement structure. Background technique [0002] Since the 1960s, accidents of severe cracking of concrete bridge structures due to temperature stress have been found both at home and abroad. For example, several thick-web box girders in Germany were damaged, and two of the bridges almost collapsed. During the inspection of the web box girder of the Jagst Bridge in Germany, it was found that serious cracks were found in the fifth year after it was opened to traffic. The estimated temperature tensile stress was as high as 2.6 MPa; the U.S. observes the change of the reaction force of the Champigny box bridge support, and the fluctuation ...

Claims

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Application Information

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IPC IPC(8): E01D19/12E01D19/08
Inventor 刘其伟罗文林
Owner 刘其伟
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