A waterproof testing device for steel bridge deck pavement structure considering fatigue load

Abstract

The utility model discloses a waterproof testing device for steel bridge deck pavement structure considering fatigue load, which belongs to the technical field of bridge engineering. It includes a loading and placing platform, a high-temperature steam preparation system, a fatigue load loading system and a cooling system. An infrared temperature detection device connected to the cooling system is installed at the bottom of the loading and placing platform. Overflow systems are connected to both sides of the loading and placing platform. A steel bridge deck pavement structure and a steel plate are mounted on the loading and placing platform. The high-temperature steam preparation system and the fatigue load loading system are located above the steel bridge deck pavement structure and the steel plate and are connected in sequence. The structure and principle of the utility model are simple, and the test results are clearly visible, which can well evaluate the waterproof performance of the steel bridge deck pavement structure. In addition, the utility model proposes for the first time a test method for the waterproof performance of the steel bridge deck pavement structure under the action of fatigue load, and innovatively uses high-temperature water vapor medium to cause abnormal temperature at the bottom of the steel bridge deck to judge the failure of the waterproof performance of the steel bridge deck pavement structure.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a waterproof testing device for a steel bridge deck pavement structure taking fatigue load into consideration. Background Art

[0002] The waterproof performance of the steel bridge deck pavement structure is a key factor affecting the service life of the steel bridge deck pavement. Under the reciprocating action of vehicle loads, cracks, pores and other defects will appear inside the steel bridge deck pavement structure, and the waterproof performance will gradually decrease. Rainwater and water vapor in the external environment, under the action of dynamic water pressure, will penetrate into the steel plate through the defects of the steel bridge deck pavement structure, corroding the steel plate and affecting the interlayer bonding performance between the steel bridge deck and the steel bridge deck pavement structure.

[0003] At present, there are only testing methods for the waterproof performance of various paving materials, and the impact of the degradation of the waterproof performance of the paving structure under fatigue load is not considered during the test. In order to better carry out the research and development and performance comparison of steel bridge deck pavement structures, it is necessary to carry out research and propose an overall waterproof performance evaluation device and method for steel bridge deck pavement structures.

[0004] The utility model introduces the influence of fatigue load on the pavement structure and uses the permeability of high-temperature steam and infrared thermal imaging principle to propose a waterproof testing device for steel bridge deck pavement structure considering fatigue load. Utility Model Content

[0005] In order to overcome the insufficiency of existing steel bridge deck pavement structure waterproof performance detection and fully consider the influence of fatigue load on the waterproof performance of steel bridge deck pavement structure, the purpose of the utility model is to provide a steel bridge deck pavement structure waterproof testing device taking fatigue load into consideration.

[0006] To achieve the above-mentioned purpose, the utility model provides a waterproof testing device for a steel bridge deck pavement structure taking fatigue load into consideration, comprising a loading and placing platform, a high-temperature steam preparation system, a fatigue load loading system and a cooling system, an infrared temperature detection device connected to the cooling system is installed at the bottom of the loading and placing platform, overflow systems are connected to both sides of the loading and placing platform, a steel bridge deck pavement structure and a steel plate are mounted on the loading and placing platform, the high-temperature steam preparation system and the fatigue load loading system are located above the steel bridge deck pavement structure and the steel plate and are connected in sequence.

[0007] Preferably, the high-temperature steam preparation system includes a water tank, a pipeline and a water vapor box, the water tank, the pipeline and the water vapor box are connected in sequence, a heating resistance wire is installed in the water tank, a valve is installed on the pipeline, and a plurality of equidistantly arranged water vapor holes are evenly arranged at the bottom of the water vapor box.

[0008] Preferably, the fatigue load loading system includes a loading wheel, which is fixedly mounted on the bottom of a slider device, the slider device is sleeved on a slide rail, the top of the slider device is connected to a pressurizing device, and the pressurizing device is connected to a power traction device.

[0009] Preferably, a plurality of infrared thermal imaging devices arranged evenly and equidistantly are installed inside the infrared temperature detection device.

[0010] Preferably, the pressurizing device, the power traction device and the infrared thermal imaging device are all electrically connected to a microcomputer.

[0011] Preferably, the cooling device comprises a cold air preparation machine, and the cold air preparation machine is connected to the infrared temperature detection device through a cold air pipeline.

[0012] Preferably, the overflow system comprises an overflow water tank, the top of the overflow water tank is connected to an overflow water pipe, and the overflow water pipe extends to the loading and placement platform.

[0013] Therefore, the utility model adopts the above-mentioned structure to provide a waterproof testing device for steel bridge deck pavement structure taking fatigue load into consideration, which has the following beneficial effects:

[0014] The utility model has a simple structure and principle, and the test results are clearly visible, which can well evaluate the waterproof performance of the steel bridge deck pavement structure. In addition, the utility model first proposes a test method for the waterproof performance of the steel bridge deck pavement structure under fatigue load, and innovatively uses high-temperature water vapor medium to cause abnormal temperature at the bottom of the steel bridge deck to judge the failure of the waterproof performance of the steel bridge deck pavement structure.

[0015] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a waterproof testing device for a steel bridge deck pavement structure taking fatigue load into consideration.

[0017] Reference numerals

[0018] 1. Sample placement table, 101. Steel bridge deck pavement structure, 102. Steel plate, 2. Infrared temperature detection device, 201. Infrared thermal imaging device, 3. Water tank, 4. Heating resistance wire, 5. Pipeline, 6. Valve, 7. Loading wheel, 8. Slide rail, 9. Slider device, 10. Pressurizing device, 11. Power traction device, 12. Overflow water pipe, 13. Overflow water tank, 14. Cold air preparation machine, 15. Cold air pipeline, 16. Microcomputer, 17. Water vapor box, 18. Water vapor hole. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Example

[0022] like Figure 1 As shown, the utility model provides a waterproof testing device for a steel bridge deck pavement structure taking fatigue load into consideration, comprising a loading and placing platform 1, a high-temperature steam preparation system, a fatigue load loading system and a cooling system, an infrared temperature detection device 2 connected to the cooling system is installed at the bottom of the loading and placing platform 1, overflow systems are connected to both sides of the loading and placing platform 1, a steel bridge deck pavement structure 101 and a steel plate 102 are mounted on the loading and placing platform 1, and the high-temperature steam preparation system and the fatigue load loading system are located above the steel bridge deck pavement structure 101 and the steel plate 102 and are connected in sequence.

[0023] The high-temperature steam preparation system includes a water tank 3, a pipeline 5 and a water vapor box 17, which are connected in sequence. A heating resistor 4 is installed in the water tank 3, a valve 6 is installed on the pipeline 5, and a plurality of equidistantly arranged water vapor holes 18 are evenly arranged at the bottom of the water vapor box 17.

[0024] The fatigue load loading system includes a loading wheel 7, which is fixedly mounted at the bottom of a slider device 9, which is sleeved on a slide rail 8, and a pressurizing device 10 is connected to the top of the slider device 9, which is connected to a power traction device 11. The pressurizing device 10 is used to set the fatigue load pressurization size, and the slider device 9 is connected to the loading wheel 7 at the bottom, and the slider device 9 is pulled by the power traction device 11 to achieve reciprocating sliding on the slide rail 8, thereby driving the loading wheel 7 to reciprocate on the surface of the steel bridge deck pavement structure 101.

[0025] A plurality of infrared thermal imaging devices 201 arranged evenly and equidistantly are installed inside the infrared temperature detection device 2. The detection range of the infrared thermal imaging device 201 can cover the steel bridge deck pavement structure 101.

[0026] The pressurizing device 10 , the power traction device 11 and the infrared thermal imaging device 201 are all electrically connected to the microcomputer 16 .

[0027] The cooling device comprises a cold air preparation machine 14 , and the cold air preparation machine 14 is connected to the infrared temperature detection device 2 through a cold air pipeline 15 .

[0028] The overflow system includes an overflow water tank 13 , the top of the overflow water tank 13 is connected to an overflow water pipe 12 , and the overflow water pipe 12 extends to the loading and placing platform 1 .

[0029] A testing method for a waterproof testing device for a steel bridge deck pavement structure considering fatigue load, the working principle of which includes the following steps:

[0030] S1. Preparation and placement of steel bridge deck pavement structure specimens: The steel bridge deck pavement structure to be tested is made on a standard thickness steel plate. After reaching the maintenance conditions, the steel bridge deck pavement structure specimen is placed on the specimen placement table, and sealing measures are taken around the specimen to prevent high-temperature water vapor from diffusing downward through the surrounding areas.

[0031] S2. Test condition setting: by debugging the pressurizing device, the power traction device, the high-temperature steam preparation system and the cooling system, the experimental conditions for the steel bridge deck pavement structure specimen in step S1 are achieved, as shown below:

[0032] The axle load required for the test is set through the pressurizing device, and the traction device is started to realize reciprocating fatigue loading of the loading wheel on the steel bridge deck pavement structure specimen;

[0033] The high-temperature steam preparation system is started, the heating resistor is energized, the water in the water tank is heated, and high-temperature steam is prepared. The high-temperature steam is input into the steam box through the pipeline, and sprayed onto the surface of the test piece through the steam holes evenly arranged at the bottom of the steam box;

[0034] The cooling system starts, and the cold air preparation machine prepares cold air with a temperature between 5-20°C. The cold air is input into the infrared temperature detection placement device through the cold air duct to cool down the bottom steel plate of the steel bridge deck pavement structure specimen. When the temperature of the bottom steel plate exceeds 40°C, the cold air preparation machine automatically starts, and the cold air is injected into the infrared temperature detection placement device to cool down the bottom steel plate.

[0035] S3. The infrared temperature detection device is started, and all infrared thermal imaging devices are started to monitor the temperature of the bottom steel plate of the steel bridge deck pavement structure specimen in real time, and transmit the relevant monitoring data to the microcomputer;

[0036] S4, evaluation of the waterproof performance of the steel bridge deck pavement structure, by recording the results of the bottom steel plate of the steel bridge deck pavement structure specimen in step S2 and step S3, the waterproof performance of the bottom steel plate of the steel bridge deck pavement structure specimen is evaluated, as shown below:

[0037] If the infrared thermal imaging device detects that the steel plate at the bottom of the steel bridge deck pavement structure specimen has an obviously abnormally high temperature, it is determined that the waterproof performance of the steel bridge deck pavement structure has failed;

[0038] High-temperature steam passes through the steel bridge deck pavement structure to directly heat the steel plate, and the number of fatigue load actions when obvious abnormalities occur is recorded;

[0039] The waterproof performance of the steel bridge deck pavement structure is evaluated by the number of fatigue loads at which the bottom steel plate of the steel bridge deck pavement structure specimen shows obvious abnormal high temperature.

[0040] Therefore, the utility model adopts the above-mentioned steel bridge deck pavement structure waterproof test device considering fatigue load, which has simple structure and principle, clear test results, and can well evaluate the waterproof performance of the steel bridge deck pavement structure. In addition, the utility model proposes for the first time a test method for the waterproof performance of the steel bridge deck pavement structure under fatigue load, and innovatively uses high-temperature water vapor medium to cause abnormal temperature at the bottom of the steel bridge deck to judge the failure of the waterproof performance of the steel bridge deck pavement structure.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A waterproof testing device for steel bridge deck pavement structure considering fatigue load, characterized in that: It includes a loading and placing platform, a high-temperature steam preparation system, a fatigue load loading system and a cooling system. An infrared temperature detection device connected to the cooling system is installed at the bottom of the loading and placing platform. Overflow systems are connected to both sides of the loading and placing platform. A steel bridge deck pavement structure and a steel plate are mounted on the loading and placing platform. The high-temperature steam preparation system and the fatigue load loading system are located above the steel bridge deck pavement structure and the steel plate and are connected in sequence.

2. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 1 is characterized in that: The high-temperature steam preparation system includes a water tank, a pipeline and a water vapor box, wherein the water tank, the pipeline and the water vapor box are connected in sequence, a heating resistance wire is installed in the water tank, a valve is installed on the pipeline, and a plurality of water vapor holes arranged equidistantly are evenly arranged at the bottom of the water vapor box.

3. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 1 is characterized in that: The fatigue load loading system comprises a loading wheel, which is fixedly mounted on the bottom of a slider device, the slider device is sleeved on a slide rail, the top of the slider device is connected to a pressurizing device, and the pressurizing device is connected to a power traction device.

4. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 3 is characterized in that: A plurality of infrared thermal imaging devices arranged evenly and equidistantly are installed inside the infrared temperature detection device.

5. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 4 is characterized in that: The pressurizing device, the power traction device and the infrared thermal imaging device are all electrically connected to a microcomputer.

6. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 1, characterized in that: The cooling system comprises a cold air preparation machine, and the cold air preparation machine is connected to the infrared temperature detection device through a cold air pipeline.

7. The waterproof testing device for steel bridge deck pavement structure considering fatigue load according to claim 1 is characterized by: The overflow system comprises an overflow water tank, the top of the overflow water tank is connected with an overflow water pipe, and the overflow water pipe extends to the loading and placing platform.

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