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Prestressed bridge surface connection device and prefabrication method and construction method thereof

A connecting device and prestressing technology, which is applied in the direction of bridges, bridge parts, bridge materials, etc., can solve problems such as cracking, crushing and sags, and achieve the effects of improving durability, solving easy damage, and driving smoothly and comfortably

Active Publication Date: 2017-02-22
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the prestressed bridge deck connection device provided with prestressed steel bars has high compressive strength and high tensile strength, which can solve problems such as cracking and crushing depressions of ordinary concrete bridge deck connection devices, and the structure is relatively Simple and practical

Method used

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  • Prestressed bridge surface connection device and prefabrication method and construction method thereof
  • Prestressed bridge surface connection device and prefabrication method and construction method thereof
  • Prestressed bridge surface connection device and prefabrication method and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1-Figure 7 As shown, a prestressed bridge deck connection device includes a connecting plate main body 1 poured with ultra-high performance concrete materials. Three parallel corrugated pipes 2 are fixed longitudinally inside the main body 1 of the connecting plate, and two through grouting holes 3 are arranged above the pipe wall of each corrugated pipe 2, and the grouting holes 3 communicate with the inside of the bellows 2 in the connecting plate main body 1 Channels are formed inside and closed after grouting. The bellows 2 is inserted with a prestressed steel bar 4 stretched by "post-tensioning" that can increase the prestress of the connecting plate main body 1. The length of the prestressed steel bar 4 is greater than the length of the bellows 2. The prestressed steel bar 4 and the corrugated There is a clearance fit between the pipes 2, and a fixing assembly for fixing the prestressed steel bar 4 to prevent retraction is provided between the two...

Embodiment 2

[0046] A prestressed bridge deck connection device of the present invention is prefabricated according to the following steps:

[0047] ① Preparation of concrete slurry;

[0048] In this example, in order to prepare ultra-high performance concrete slurry: add cement and silica fume into a dry mixer in proportion, start it up and stir for 2 minutes, then stop it, add fine quartz sand and stir for 1 minute, and then add a certain amount of water Mix with water reducer and keep stirring, stir for 4 minutes until uniform to obtain slurry, add a certain amount of steel fiber in stages and stir until the steel fiber is well wrapped and evenly distributed by the slurry, and ultra-high performance concrete slurry is obtained material. The resulting ultra-high performance concrete (UHPC) slurry is a cement-based material with ultra-high strength, high toughness and durability.

[0049] ②Pouring: The formwork of the prestressed bridge deck connection device is made in advance. The for...

Embodiment 3

[0062] Such as Figure 5-Figure 7 As shown, a kind of prestressed bridge deck connecting device of the present invention carries out on-site construction at the bridge construction site according to the following steps:

[0063] ①Pay the debonding layer 17 at the end of the main beam 15, that is, brush two layers of asphalt above the end of the precast concrete beam, and then spread a layer of plastic film, and use light material 18 to fill the space between the main beam 15, such as light Packaging board or bitumen impregnated cork board.

[0064] ②Assembly: Assemble the bridge deck connection device in a modular manner. The main body 1 of the horizontal connecting plate is connected with the horizontal connecting steel bar 5, and the longitudinal connecting steel bar 6 is used to connect the bridge deck steel mesh 16 on both sides vertically.

[0065] ③ Set waterproof material at 7 post-pouring belts at both ends of the bridge deck connection device, and use concrete above ...

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Abstract

The invention discloses a prestressed bridge connection device and a prefabrication method and construction method thereof. The prestressed bridge connection device includes a connecting plate main body formed by pouring ultra-high performance concrete, and is characterized in that the inside of the connecting plate main body is fixedly provided with at least one corrugated pipe in the longitudinal direction, the upper portion of the pipe wall of the corrugated pipe is provided with two through grouting holes, a prestressed reinforcing steel bar is inserted in the corrugated pipe, the length of the prestressed reinforcing steel bar is larger than that of the corrugated pipe, a fixing assembly for fixing the prestressed reinforcing steel bar is arranged between the prestressed reinforcing steel bar and the connecting plate main body, and the connecting plate main body is provided with a plurality of transverse connection reinforcing steel bars extending out of the two transverse ends of the connecting plate main body and a plurality of longitudinal connection reinforcing steel bars extending out of the two longitudinal ends of the connecting plate main body; the two transverse ends of the connecting plate main body are provided with post-pouring belts used for pouring the concrete. The prestressed ultra-high-performance concrete bridge connection device has the advantages of cracking prevention and crushing resistance, driving is thus stable and comfortable, and service life of a bridge surface continuous structure is prolonged.

Description

technical field [0001] The invention relates to the field of bridge connection components, in particular to a prestressed bridge deck connection device and its prefabrication method and construction method. Background technique [0002] Simply supported bridges with multiple spans arranged continuously are widely used in medium and small span bridges because of their simple structure, convenient construction and low cost. However, the number of expansion joints of this type of bridge is large, which is likely to cause the problem of frequent vehicle jumping, so the driving comfort is poor; in addition, it is also easy to cause widespread damage to the expansion joints, and secondary damage to the bridge structure caused by the damage of the expansion joints However, frequent maintenance and replacement of expansion joints and bridge maintenance will affect the normal service life of the bridge and increase maintenance costs. [0003] In order to reduce the adverse effects o...

Claims

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Application Information

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IPC IPC(8): E01D19/12E01D21/00E01D101/26
CPCE01D19/125E01D21/00E01D2101/26
Inventor 丁勇俞丹波梁宇辉杨阳邹毓颖黄冲邱小珊徐晨翱
Owner NINGBO UNIV
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