Highway bridge expansion joint structure

A technology for highway bridges and expansion joints, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of long maintenance period, long construction period, low flatness, etc., to meet performance requirements, fast and simple construction, and good durability. Effect

Active Publication Date: 2020-08-07
山东高速路桥集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The flatness is not high, the expansion joint needs to be welded with the bridge, and the construction period is long;
[0006] (2) The stress point is relatively concentrated, which is easy to cause structural damage, and the maintenance cost is high and the maintenance period is long;
[0007] (3) The asphalt mixture used for filling expansion joints is easy to age and has poor stability

Method used

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  • Highway bridge expansion joint structure
  • Highway bridge expansion joint structure
  • Highway bridge expansion joint structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , a highway bridge expansion joint structure, comprising a transverse plate 9, a longitudinal member, a filling layer 2 and a covering layer 3, the transverse plate 9 is arranged above the expansion joint formed by the concrete layer 7 and connected with the concrete layer 7 by bolts 6, the longitudinal member There are two groups, each group includes a longitudinal main body 10 and a telescopic rubber strip 1, the longitudinal main body 10 is arranged at both ends of the horizontal plate 9, and the top of the longitudinal main body 10 has two parallel and spaced slots, and the two ends of the telescopic rubber strip 1 are inserted into the slots Inside, both sides of the transverse board 9 and the longitudinal members are bonded together with the pavement layer 5, the filling layer 2 is arranged between the longitudinal members and between the pavement layers 5, the covering layer 3 is located above the filling layer 2, and the covering layer The 3 up...

Embodiment 2

[0042]The difference with embodiment 1 is:

[0043] Modified asphalt includes the following raw materials: 65-70 parts of base asphalt, 1-6 polymers of pentaerythritol allyl ether, 0.5-1.5 parts of colloidal silica, 1-3 rubber particles; polymers of pentaerythritol allyl ether The molecular weight of the polymer is 72.0627, the pH value is 2.7-3.5, the viscosity is 350000-65000, the apparent density is 0.21g / cm3, the specific gravity is 1.41, and the water content is ≤2.0%.

[0044] The specific preparation method of modified asphalt is as follows:

[0045] (1) Dissolve tetraethyl orthosilicate, polyvinylpyrrolidone, and triethanolamine in ethanol, then add ammonia water dropwise, stir evenly, add methyldiethoxysilane, stir for 2-3 hours, and obtain two Silica colloidal;

[0046] (2) Heat and stir the polymer of pentaerythritol allyl ether, adjust the pH to 7.0-7.2, then add rubber particles, asphalt, and silica colloid and mix well.

[0047] The mass ratio of tetraethyl or...

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Abstract

The aim of the invention is to provide a highway bridge expansion joint structure which is stable in overall structure and long in service life. The highway bridge expansion joint structure comprisestransverse plates, longitudinal components, a filling layer and a covering layer, the transverse plate is arranged above an expansion joint formed by the concrete layer and is connected with the concrete layer through a bolt; two sets of longitudinal components are provided, each group comprises a longitudinal main body and a telescopic adhesive tape; the longitudinal bodies are arranged at two ends of the transverse plate; two parallel inserting grooves are formed in the top of the longitudinal body at intervals, the two ends of the telescopic rubber strip are inserted into the inserting grooves, the two sides of the transverse plate and the two sides of the longitudinal component are bonded with the paving layer into a whole, the filling layer is arranged between the longitudinal components and located between the paving layers, the covering layer is located above the filling layer, and the upper surface of the covering layer is flush with the upper surfaces of the paving layers.

Description

technical field [0001] The invention relates to an expansion joint structure, in particular to a road bridge expansion joint structure, and belongs to the technical field of bridge building materials. Background technique [0002] Bridges are essential facilities for road traffic. In order to ensure that under the influence of factors such as temperature changes, concrete shrinkage and creep, and loads, the bridge span structure can freely deform according to the static force diagram and ensure that vehicles pass smoothly. Expansion joints are an important part of bridge engineering. The quality of expansion joints will affect the overall connection of the bridge, and it will cause a lot of impact and jumping when the vehicle is running, leading to traffic safety accidents. [0003] At present, asphalt is mostly modified by adding high-molecular polymers to improve the performance of asphalt. However, due to the density, polarity, and molecular weight of most polymers, thei...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E01D19/06C04B26/26
CPCC04B26/26C04B2111/00612E01D19/06C04B18/141C04B14/02C04B14/06C04B24/26C04B14/062C04B18/22C04B18/08C04B18/146
Inventor尹壮飞刘东美王伟刘腾飞高培旭侯有为王增强
Owner山东高速路桥集团股份有限公司