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Joint structure of concrete track slab

A track slab and concrete technology, applied in the direction of tracks, roads, ballast layers, etc., can solve the problems of accelerating the rate of joint corrosion, increasing the safety hazards of high-speed railways, and changing joints, so as to enhance the waterproof effect and improve the safety performance. Water effect, the effect of reducing the degree of corrosion

Active Publication Date: 2018-03-06
TIANJIN CONSTR ENG CO LTD OF CHINA RAILWAY FIRST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the groundwater will evaporate when the temperature is high, and the evaporated water vapor cannot enter the atmosphere through the seam smoothly due to being hindered by the waterproof strip (6), so it is confined to the seam (4) for a long time In this way, the seam (4) tends to become more and more moist over time
The humid environment is very easy to cause the growth of bacteria and fungi, and bacteria and fungi will produce a large amount of organic acids in the process of growth and reproduction, which will also easily accelerate the rate of corrosion of the joint (4), and thus will greatly increase the safety hazards of high-speed railways

Method used

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  • Joint structure of concrete track slab
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Examples

Experimental program
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Effect test

preparation example Construction

[0046] The preparation steps of the water-absorbent water-swellable water-stop strip here include: kneading 100 kg of methyl vinyl silicone rubber raw rubber and 10 kg of high-molecular water-absorbing resin in a vacuum kneader for 2 minutes, and then kneading 30 kg of fumed silica, 0.2 Stearic acid 1801 in kg, dimethyldimethoxysilane in 3kg, hexamethyldisilazane in 3kg and distilled water in 1kg were added to the vacuum kneader 4 times, and fully stirred after each addition, and mixed Stir and mix the materials evenly. After the rubber materials are kneaded and shaped, heat up to 140°C, heat for 90min, then vacuumize to a vacuum degree of -0.07MPa, vacuumize for 120min, cool down to 75°C with cooling water, and then cool to room temperature , and extruded by an extruder to obtain a finished water-absorbing expansion water-stop strip. Here, the polymer water-absorbing resin can be provided by Renqiu Huabei Chemical Co., Ltd. Certainly, the formula composition of concrete situ...

Embodiment 2

[0052] A joint structure of concrete track slabs, as attached Figure 4 As shown, on the basis of the first embodiment, the concrete track slab 1 and the concrete track slab 2 2 are provided with limiting grooves 43 in the joints 4, and the limiting grooves 43 are located below the water guide sheet 41, and the limiting grooves on both sides The groove 43 is arranged symmetrically with respect to the seam 4 , and the cross section of the limiting groove 43 is arranged as an isosceles trapezoid, and the two bases of the isosceles trapezoid are arranged in a vertical direction. At the same time, the isosceles trapezoid is filled with a number of water-absorbing swellable water-stop balls 5 , and the diameter of the water-absorbing swellable water-stop balls 5 in a dry state is greater than the width of the seam 4 , so that the water-absorbing swellable water-stop balls 5 can be prevented from falling from the seam 4 . Thereby, it is equivalent to setting the second waterproof me...

Embodiment 3

[0054] A joint structure of concrete track slabs, as attached Figure 5 And attached Image 6 As shown, based on the second embodiment, there are several rectangular grooves 21 on the concrete track slab 1 and the concrete track slab 2, and the groove 2 21 is also located under the water-absorbing expansion water-stop strip 3. The bottom of the groove two 21 is fixed with an elastic sheet 22 made of metal, and the periphery of the elastic sheet 22 is provided with a sealing ring 221, where the sealing ring 221 is made of silicon rubber, which can also be determined according to the actual situation. On the one hand, when the water-absorbing expansion water-stop strip 3 absorbs water, the weight will increase, so that the elastic sheet 22 can be pressed in the second groove 21 . On the other hand, when dry, the elastic sheet 22 can slightly lift the water-absorbing water-swelling strip 3, thereby increasing the gap between the water-swelling water-stopping strip 3 and the conc...

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Abstract

The invention discloses a joint structure of a concrete rail board. The joint structure comprises a first concrete rail board body and a second concrete rail board body. A joint is formed between the first concrete rail board body and the second concrete rail board body, a transparent water-absorbing expanding water stopping strip is arranged at a joint opening in the joint, the cross section of the water-absorbing expanding water stopping strip comprises a transverse edge and a vertical edge, the transverse edge crosses to the joint, the vertical edge extends into the joint, grooves are formed in the two sides of the transverse edge and the two sides of the vertical edge respectively, the first concrete rail board body and the corresponding portion of the concrete rail board and the groove are provided with arc protrusions, and the transverse edge of the water-absorbing expanding water stopping strip is respectively fixed to the first concrete rail board body and the second concrete rail board body through rivets. The joint structure of the concrete rail board is good in waterproof effect, and meanwhile evaporation of internal water is not influenced; sunshine can also smoothly illuminate in the joint, the joint cannot be prone to microorganism breeding, the corrosion-resistant capacity of the joint is enhanced accordingly, and the service life of the joint structure is further prolonged.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a joint structure of concrete track slabs. Background technique [0002] With the rapid development of my country's high-speed railway, people's travel has become more and more convenient. Moreover, high-speed railways are generally ballastless tracks, and many concrete components are used in the construction process, such as sleepers, track slabs, and base slabs, etc., especially in the splicing process of track slabs. seam. When it rains, the rainwater will flow into the seams, which will gradually corrode the seams, so that the seams will become bigger and bigger over time. [0003] For this reason, railway construction units often Figure 8 A T-shaped waterproof strip (6) is set in the joint (4) formed by the concrete track slab 1 (1) and the concrete track slab 2 (2) shown, so that although it can reduce rainwater from entering the joint (4) The probability. However,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00
CPCE01B1/002E01B1/008
Inventor 李文明张宏斌周矛矛刘志庆孙刚谭任军张元龙周立娜
Owner TIANJIN CONSTR ENG CO LTD OF CHINA RAILWAY FIRST GRP CO LTD
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