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 s

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

Example Embodiment

[0035] Example 1

[0036] Such as Figure 1-Figure 7 As shown, a prestressed bridge deck connecting device includes a connecting plate main body 1 made of ultra-high performance concrete material. Three parallel corrugated pipes 2 are fixed longitudinally inside the connecting plate main body 1, and two through grouting holes 3 are provided above the pipe wall of each corrugated pipe 2. The grouting holes 3 communicate with the inside of the corrugated pipe 2 in the connecting plate body 1 A channel is formed inside and closed after grouting. The bellows 2 is inserted with prestressed steel bars 4 stretched by the "post-tensioning method" that can increase the prestress of the main body 1 of the connecting plate. The length of the prestressed steel bars 4 is greater than the length of the corrugated pipe 2. The prestressed steel bars 4 and the corrugated There is a clearance fit between the pipes 2. The pre-stressed steel bars 4 and the two outer side walls of the connecting pla...

Example Embodiment

[0045] Example 2

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

[0047] ①Prepare concrete slurry;

[0048] In this example, to prepare ultra-high performance concrete slurry: add cement and silica fume in proportion to the dry mixer, start mixing for 2 minutes and then stop, add fine quartz sand and stir for 1 minute, then add a certain amount of water Keep mixing with water reducing agent and mix for 4 minutes until uniform to obtain a slurry. Add a certain amount of steel fiber in batches and stir until the steel fiber is well wrapped by the slurry and distributed evenly to obtain an ultra-high performance concrete slurry. material. The prepared ultra-high performance concrete (UHPC) slurry is a cement-based material with ultra-high strength, high toughness and durability.

[0049] ②Pouring: The template of the prestressed bridge deck connection device is made in advance. The template includes the s...

Example Embodiment

[0061] Example 3

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

[0063] ① Pave the debonding layer 17 on 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 a lightweight material 18 between the main beams 15 to fill in the blanks, such as light Quality packaging board or pitch-impregnated cork board.

[0064] ②Assembling: Assemble the bridge deck connecting device in a modular manner. The main body 1 of the transverse connecting plate is connected by the transverse connecting steel bar 5, and the longitudinal connecting steel bar 6 is connected with the bridge deck steel mesh 16 on both sides in the longitudinal direction.

[0065] ③Install waterproof materials at 7 places after the lateral ends of the bridge deck connection devic...

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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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