Pavement crack double-layer reinforcement CRCP construction test method and construction method

Abstract

The invention discloses a pavement crack double-layer reinforcement CRCP construction test method and construction method.The pavement crack double-layer reinforcement CRCP construction test device comprises a supporting structure, a walking mechanism, a heating device, a cooling device and an infrared thermal imaging device, and the walking mechanism is connected with the supporting structure through a lifting mechanism; the output end of the heating device is arranged towards the road surface, and the output end of the cooling device is arranged towards the road surface. Debugging the test device and adjusting the height; screening a detection range and set properties; the test device heats a target road surface, the cooling device assists in keeping constant temperature or cooling, the infrared thermal imaging device photographs and / or photographs, and the infrared thermal imaging device quantifies temperature distribution data to form a distribution image; and analyzing and judging data, namely determining damage and defect positions and judging the fullness quality of a structural interface.

Description

Technical Field

[0001] The present invention relates to the technical field of pavement test equipment, in particular, to a pavement crack double-layer reinforcement CRCP construction test method. In addition, the present invention also relates to a construction method including the pavement crack double-layer reinforcement CRCP construction test method. Background Art

[0002] CRCP, also known as continuously reinforced concrete pavement, controls the location and spacing of cracks in the concrete pavement through continuous reinforcement, reduces the spacing and width of cracks, and limits the further development of cracks, thereby improving the integrity and durability of the pavement.

[0003] In the prior art, it is impossible to conduct rapid and effective testing on the construction quality of CRCP for pavement cracks during construction. Visual inspection or simple instrument testing relies on manual judgment, which has low accuracy and cannot guarantee the construction quality.

[0004] On the other hand, rapid testing and inspection of the impact of high and low temperature changes in daily life cannot guarantee its construction quality. The existing technology mainly conducts tests by creating large-scale flame combustion and then naturally cooling down the temperature, which is inefficient and poses a great safety hazard. Summary of the invention

[0005] The invention provides a pavement crack double-layer reinforcement CRCP construction test method and a construction method, so as to solve the technical problems that during the existing pavement crack CRCP construction, the construction quality cannot be tested and detected, the high and low temperature changes in daily life cannot be quickly tested and detected, and the construction quality cannot be guaranteed.

[0006] According to one aspect of the present invention, a double-layer reinforcement CRCP construction test method for pavement cracks is provided, which is applied to a double-layer reinforcement CRCP construction test device for pavement cracks. The test device includes a support structure, a walking mechanism, a heating device, a cooling device and an infrared thermal imaging device. The walking mechanism is connected to the support structure through a lifting mechanism. The output end of the heating device is arranged toward the pavement, and the output end of the cooling device is arranged toward the pavement. The test method includes:

[0007] S1. Target road cleaning;

[0008] S2. Test equipment debugging and height adjustment;

[0009] S3. Detection scope and proposed property screening;

[0010] S4. The target road surface is heated by the test device, and the cooling device is used to assist in constant temperature or cooling. The infrared thermal imaging device is used to take photos and / or video, and the infrared thermal imaging device is used to quantify the temperature distribution data to form a distribution image;

[0011] S5. Data analysis and judgment, including determining the location of damage and defects, and judging the fullness and quality of the structural interface.

[0012] As a further improvement of the above technical solution, step S1 includes:

[0013] The test time is determined based on the test environment factors and the orientation of the target road surface structure.

[0014] As a further improvement of the above technical solution, the lifting mechanism includes a mounting frame arranged on the supporting structure, a lifting leg slidably connected to one side of the mounting frame, and a telescopic push rod arranged in the mounting frame, the output end of the telescopic push rod is connected to the lifting leg, and the walking mechanism includes a moving wheel arranged at the bottom of the lifting leg; step S2 includes:

[0015] The height of the lifting legs is adjusted by controlling the telescopic push rod to adjust the height of the output end of the heating device from the ground, and the infrared thermal imaging device is adjusted so that the imaging area covers the target road surface.

[0016] As a further improvement of the above technical solution, step S3 includes:

[0017] The target road surface is inspected as a whole or at fixed points. If one or more of the following exists in the construction area: internal voids, loose areas, honeycombs, insufficient protective layer, exposed steel bars, and cracks, the target road surface is monitored at fixed points. Otherwise, the target road surface is inspected as a whole.

[0018] As a further improvement of the above technical solution, the cooling device includes a water tank arranged on the support structure and located above the heating device, a delivery pump arranged on the water tank, a delivery pipeline connected to the delivery pump, and a water distribution pipe connected to the delivery pipeline, the water distribution pipe is arranged at the bottom of the support structure and symmetrically arranged on both sides of the output end of the heating device, a plurality of nozzles are arranged on the water distribution pipe at a preset angle, the nozzle arrangement angle of the water distribution pipe arranged on the first side of the test device is inclined to the bottom of the second side of the test device, and the nozzle arrangement angle of the water distribution pipe arranged on the second side of the test device is inclined to the bottom of the first side of the test device, and step S4 also includes:

[0019] During the constant temperature test of the target road surface, the test device detects the road surface temperature. If the temperature is higher than the preset value, the cooling device starts to spray and cool the road surface until the road surface temperature is lower than the preset value and then stops;

[0020] During the temperature-varying test on the target road surface, the test device detects the road surface temperature. After the road surface temperature reaches a preset value and remains for a preset time, the cooling device starts to spray and cool the road surface.

[0021] As a further improvement of the above technical solution, an observation window is provided on one side of the water storage tank, and step S4 further includes:

[0022] Observe the water level in the water tank through the observation window. If the water level is lower than the preset height, refill the water tank.

[0023] As a further improvement of the above technical solution, step S4 further includes:

[0024] After completing the detection of the current area of ​​the target road surface, move the test device to the next area for testing.

[0025] As a further improvement of the above technical solution, step S4 further includes:

[0026] After completing the inspection of the current area of ​​the target road surface, the telescopic push rod is extended to raise the support structure. After moving the test device to the next area, the telescopic push rod is retracted to lower the support structure to a height of 50-60cm from the target road surface.

[0027] As a further improvement of the above technical solution, step S5 includes:

[0028] The damage and defect locations are determined based on the temperature difference areas in the temperature distribution, and the interface fullness quality is determined based on the heat accumulation formed in the gap part.

[0029] According to another aspect of the present invention, a construction method is also provided, which includes the above-mentioned pavement crack double-layer reinforcement CRCP construction test method.

[0030] The present invention has the following beneficial effects:

[0031] This test method uses a test device by design, which has a support structure as a support, and a lifting mechanism is set to connect the walking mechanism and the support structure, so that the test device can move on the target test road surface, and the height of the main body from the ground is adjusted according to the test requirements, and the road surface partitions are tested separately; before starting the test, the target road surface is cleaned to avoid affecting the test results; the height of the test device and the heating device from the ground is debugged to prepare for the test, the detection range and detection nature are determined according to the known road surface conditions at the construction site, the heating device of the test device is turned on to heat the target road surface, the detected heat accuracy is quantified by the infrared thermal imaging device, and the temperature distribution change data on the road surface are statistically formed into a distribution image, so as to analyze the internal defective parts of the road surface structure. It can test and detect the internal voids, loose areas, honeycombs and insufficient protective layers caused by leakage of formwork due to insufficient vibration, too dense steel mesh, improper selection of the maximum particle size of steel aggregate during construction, and even exposed steel bars and layered looseness from the surface to the inside under long-term corrosive media or freeze-thaw action, as well as cracks in concrete caused by internal and external forces. This test method is a non-contact measurement that does not affect the object being measured. Accurate data can be obtained without exploring the inside of the object being measured. The results are intuitive and greatly improve the efficiency of pavement detection. On the other hand, the cooling device can be used to quickly reduce the temperature or cooperate with the heating device to maintain a constant temperature, which not only improves the test effect and efficiency, but also can reflect the pavement quality after the high and low temperature difference of the pavement changes in the test.

[0032] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 1 ;

[0035] Figure 2 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 2 ;

[0036] Figure 3 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 3 .

[0037] Legend:

[0038] 1. Mounting base; 2. Controller; 3. Heater; 4. Mounting bracket; 5. Water tank; 6. Delivery pump; 7. Delivery pipeline; 8. Water distribution pipe; 9. Nozzle; 10. Push-pull handle; 11. Observation window; 12. Fixing parts; 13. Mounting frame; 14. Mounting slot; 15. Telescopic push rod; 16. Lifting bracket; 17. Lifting legs; 18. Moving wheels; 19. Guide protrusions. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0040] Figure 1 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 1 ; Figure 2 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 2 ; Figure 3 The schematic diagram of the construction device structure of the preferred embodiment of the present invention is Figure 3 .

[0041] like Figures 1 to 3 As shown, the double-layer reinforcement CRCP construction test method for pavement cracks of this embodiment is applied to the double-layer reinforcement CRCP construction test device for pavement cracks. The test device includes a support structure, a walking mechanism, a heating device, a cooling device and an infrared thermal imaging device. The walking mechanism is connected to the support structure through a lifting mechanism. The output end of the heating device is arranged toward the pavement, and the output end of the cooling device is arranged toward the pavement. The test method includes:

[0042] S1. Target road cleaning;

[0043] S2. Test equipment debugging and height adjustment;

[0044] S3. Detection scope and proposed property screening;

[0045] S4. The target road surface is heated by the test device, and the cooling device is used to assist in constant temperature or cooling. The infrared thermal imaging device is used to take photos and / or video, and the infrared thermal imaging device is used to quantify the temperature distribution data to form a distribution image;

[0046] S5. Data analysis and judgment, including determining the location of damage and defects, and judging the fullness and quality of the structural interface.

[0047] Among them, the infrared thermal imaging device is realized based on the infrared thermal imager of the prior art; the infrared thermal imager is a detection device that calculates the temperature value. In the process of heat flow propagation formed on the target road surface to be measured, due to the different thermal conductivity between the defective part and the normal part inside the road surface, according to the heat conduction equation theory, it can be known that this difference will cause the temperature of the defective part and the intact part on the building surface to be different; the detected heat accuracy is quantified by the infrared thermal imager, and the temperature distribution change data of the road surface is statistically formed into a distribution image. Since the defective position and the normal position have significant light and dark differences on the image, the position of the defective part inside the road surface structure can be analyzed; the heating device includes a resistive heater 3 and a controller 2 electrically connected to the resistive heater 3;

[0048] It can be understood that the test method uses a test device by design, which has a supporting structure as a support, and a lifting mechanism is set to connect the walking mechanism and the supporting structure, so that the test device can move on the target test road surface, and the height of the main body from the ground is adjusted according to the test requirements, and the road surface partitions are tested separately; before starting the test, the target road surface is cleaned to avoid affecting the test results; the height of the test device and the heating device from the ground is debugged to prepare for the test, the detection range and detection nature are determined according to the known conditions of the road surface at the construction site, the heating device of the test device is turned on to heat the target road surface, the detected heat accuracy is quantified by the infrared thermal imaging device, and the temperature distribution change data on the road surface are statistically formed into a distribution image, so as to analyze the internal defects of the road surface structure. The location of the part can be tested for internal voids, loose areas, honeycombs and insufficient protective layers, even exposed steel bars and long-term corrosive media or layered looseness from the surface to the inside under the action of freeze-thaw, as well as cracks in the concrete caused by internal and external forces, such as leakage of formwork caused by insufficient vibration, too dense steel mesh, improper selection of the maximum particle size of steel aggregate during construction. This test method is a non-contact measurement that does not affect the object being measured. Accurate data can be obtained without exploring the inside of the object being measured. The results are intuitive and greatly improve the efficiency of pavement detection. On the other hand, the cooling device can be further used to quickly reduce the temperature or cooperate with the heating device to maintain a constant temperature, which not only improves the test effect and test efficiency, but also can reflect the pavement quality after the high and low temperature difference of the pavement changes in the test.

[0049] In this embodiment, step S1 includes:

[0050] The test time shall be determined based on the test environmental factors and the orientation of the target road surface structure; the environmental factors include weather, wind speed, ambient temperature, etc. The test shall be carried out in the absence of rain and with a wind speed of ≤ Level 3.

[0051] In this embodiment, the lifting mechanism includes a mounting frame 13 provided on the supporting structure, a lifting leg 17 slidably connected to one side of the mounting frame 13, and a telescopic push rod 15 provided in the mounting frame 13, wherein the output end of the telescopic push rod 15 is connected to the lifting leg 17, and the walking mechanism includes a moving wheel 18 provided at the bottom of the lifting leg 17; step S2 includes:

[0052] The height of the lifting legs 17 is adjusted by controlling the telescopic push rod 15 to adjust the height of the output end of the heating device from the ground, and the infrared thermal imaging device is adjusted so that the imaging area covers the target road surface.

[0053] In this embodiment, step S3 includes:

[0054] The target road surface is inspected as a whole or at a fixed point. If one or more of the following exists in the construction area: internal voids, loose areas, honeycombs, insufficient protective layer, exposed steel bars, cracks, etc., the target road surface is monitored at a fixed point. Otherwise, the target road surface is inspected as a whole.

[0055] The road surface can be inspected as a whole and put into use with the test device. If it is known that there are problems in the construction process of a certain area of ​​the road surface, such as internal voids, loose areas, honeycombs and insufficient protective layers, or even exposed steel bars caused by insufficient vibration, too dense steel mesh but improper selection of the maximum aggregate particle size, or cracks formed due to internal and external forces in the concrete, and the depth of the cracks needs to be detected, directional and fixed-point inspection can be carried out.

[0056] In this embodiment, the telescopic push rod 15 is arranged in the mounting frame 13, and a mounting groove 14 matching the stroke of the telescopic push rod 15 is opened on one side of the mounting frame 13, and the output end of the telescopic push rod 15 extends out of the mounting groove 14; the lifting leg 17 is arranged on the side of the mounting frame 13 where the mounting groove 14 is opened, and a lifting bracket 16 connected to the output end of the telescopic push rod 15 is provided on the lifting leg 17; the telescopic push rod 15 is protected by the mounting frame 13; a clamping structure for cooperating with the side wall of the lifting leg 17 is provided on one side of the supporting structure, and a sliding groove is opened on the inner wall of the clamping structure, and a strip-shaped guide protrusion 19 for cooperating with the sliding groove is formed on the side wall of the lifting leg 17, and the clamping structure is clamped on both sides of the lifting leg 17, and the direction in which the sliding groove is opened is the moving direction of the lifting leg 17. During the lifting process, the guide protrusion 19 moves along the sliding groove, and the operation is more stable.

[0057] In this embodiment, the cooling device includes a water tank 5 arranged on the supporting structure and located above the heating device, a delivery pump 6 arranged on the water tank 5, a delivery pipeline 7 connected to the delivery pump 6, and a water distribution pipe 8 connected to the delivery pipeline 7. The water distribution pipe 8 is connected to the bottom of the supporting structure through a fixing member 12 and is symmetrically arranged on both sides of the output end of the heating device. A plurality of nozzles 9 are arranged at a preset angle on the water distribution pipe 8. The nozzle 9 of the water distribution pipe 8 arranged on the first side of the test device is arranged at an angle inclined to the bottom of the second side of the test device. The water distribution pipe 8 arranged on the second side of the test device is arranged at a predetermined angle. The nozzle 9 of 8 is arranged at an angle inclined to the lower side of the first side of the test device, so that the spray evenly covers the test area of ​​the target road surface to achieve uniform cooling; the supporting structure includes a mounting base 1 and a mounting bracket 4 arranged on the mounting base 1, a heating device and a lifting mechanism are respectively arranged on the mounting base 1, a heater 3 is located on the lower surface of the mounting base 1, and the heater 3 is arranged on its upper surface, and a water storage tank 5 is arranged on the mounting bracket 4, so that the heating device and the water storage tank 5 are separated to avoid the heating device from affecting the water storage tank 5, thereby ensuring the spray water temperature, avoiding affecting the cooling effect, and improving efficiency;

[0058] Step S4 also includes:

[0059] During the constant temperature test of the target road surface, the test device detects the road surface temperature. If the temperature is higher than the preset value, the cooling device starts to spray and cool the road surface until the road surface temperature is lower than the preset value and then stops; during the heating process, the road surface environment temperature is kept constant at 10°C to 55°C. If the temperature is too high, it can be cooled by the cooling device. The water in the water storage tank 5 is extracted by the delivery pump 6 through the delivery pipeline 7 to the nozzle 9 of the water distribution pipe 8, and is evenly sprayed on the target road surface during the test to cool it;

[0060] During the temperature-varying test on the target road surface, the test device detects the road surface temperature. After the road surface temperature reaches a preset value and remains for a preset time, the cooling device starts to spray and cool the road surface.

[0061] In this embodiment, an observation window 11 is provided on one side of the water storage tank 5, and step S4 further includes:

[0062] The water level in the water tank 5 is observed through the observation window 11. If the water level is lower than the preset height, the water tank 5 is replenished with water. The water volume in the water tank 5 is observed by setting the observation window 11, and water is replenished in time for subsequent tests. In some embodiments, a liquid level switch can also be set in the water tank 5, and when the water level is lower than the preset height, a water replenishment signal is sent out to remind the water replenishment.

[0063] In this embodiment, step S4 further includes:

[0064] After completing the test of the current area of ​​the target road surface, move the test device to the next area for testing;

[0065] A push-pull handle 10 is provided on one side of the test device so as to push the test device to move based on the moving wheels 18;

[0066] Specifically, after completing the inspection of the current area of ​​the target road surface, the telescopic push rod 15 is extended to raise the supporting structure. After moving the test device to the next area, the telescopic push rod 15 is retracted to lower the supporting structure to a height of 50-60 cm from the target road surface, so as to avoid possible obstacles on the road surface during movement and avoid damage to structures such as the heating device. After moving into place, the lifting mechanism is adjusted to place the heating device at a more suitable height for testing.

[0067] In this embodiment, step S5 includes:

[0068] The damage and defect locations are determined based on the temperature difference area in the temperature distribution, and the interface fullness quality is determined based on the heat accumulation formed in the gap part; specifically,

[0069] Among them, the variable temperature test can be carried out after the constant temperature test is completed. The constant temperature test of the current area of ​​the target road surface is completed by the test device. After the road surface quality is determined by the infrared thermal imager, the cooling device is started to spray the road surface for rapid cooling. The infrared thermal imager reflects the road surface quality and changes after the high and low temperature difference, and characterizes the road surface quality after the high and low temperature difference changes.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer reinforcement CRCP construction test method for pavement cracks, characterized in that: A double-layer reinforcement CRCP construction test device for pavement cracks is provided, the test device comprising a support structure, a walking mechanism, a heating device, a cooling device and an infrared thermal imaging device, the walking mechanism is connected to the support structure through a lifting mechanism, the output end of the heating device is arranged toward the pavement, and the output end of the cooling device is arranged toward the pavement, and the test method comprises: S1. Target road cleaning; S2. Test equipment debugging and height adjustment; S3. Detection scope and proposed property screening; S4. The target road surface is heated by the test device, and the cooling device is used to assist in constant temperature or cooling. The infrared thermal imaging device is used to take photos and / or video, and the infrared thermal imaging device is used to quantify the temperature distribution data to form a distribution image; S5. Data analysis and judgment, including determining the location of damage and defects, and judging the fullness and quality of the structural interface.

2. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 1 is characterized in that: Step S1 includes: The test time is determined based on the test environment factors and the orientation of the target road surface structure.

3. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 1 is characterized in that: The lifting mechanism comprises a mounting frame (13) arranged on the supporting structure, a lifting leg (17) slidably connected to one side of the mounting frame (13), and a telescopic push rod (15) arranged in the mounting frame (13), wherein the output end of the telescopic push rod (15) is connected to the lifting leg (17), and the walking mechanism comprises a moving wheel (18) arranged at the bottom of the lifting leg (17); step S2 comprises: The height of the lifting legs (17) is adjusted by controlling the telescopic push rod (15) to adjust the height of the output end of the heating device from the ground, and the infrared thermal imaging device is adjusted so that the imaging area covers the target road surface.

4. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 1 is characterized in that: Step S3 includes: The target road surface is inspected as a whole or at fixed points. If one or more of the following exists in the construction area: internal voids, loose areas, honeycombs, insufficient protective layer, exposed steel bars, and cracks, the target road surface is monitored at fixed points. Otherwise, the target road surface is inspected as a whole.

5. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 1 is characterized in that: The cooling device comprises a water tank (5) arranged on the supporting structure and located above the heating device, a delivery pump (6) arranged on the water tank (5), a delivery pipeline (7) connected to the delivery pump (6), and a water distribution pipe (8) connected to the delivery pipeline (7); the water distribution pipe (8) is arranged at the bottom of the supporting structure and symmetrically arranged on both sides of the output end of the heating device; a plurality of nozzles (9) are arranged on the water distribution pipe (8) at a preset angle; the nozzle (9) of the water distribution pipe (8) arranged on the first side of the test device is arranged at an angle inclined to the bottom of the second side of the test device; and the nozzle (9) of the water distribution pipe (8) arranged on the second side of the test device is arranged at an angle inclined to the bottom of the first side of the test device. Step S4 also comprises: During the constant temperature test of the target road surface, the test device detects the road surface temperature. If the temperature is higher than the preset value, the cooling device starts to spray and cool the road surface until the road surface temperature is lower than the preset value and then stops; During the temperature-varying test on the target road surface, the test device detects the road surface temperature. After the road surface temperature reaches a preset value and remains for a preset time, the cooling device starts to spray and cool the road surface.

6. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 5 is characterized in that: An observation window (11) is provided on one side of the water storage tank (5), and step S4 further comprises: The water level in the water storage tank (5) is observed through the observation window (11), and if the water level is lower than a preset height, the water storage tank (5) is replenished with water.

7. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 3 is characterized in that: Step S4 also includes: After completing the detection of the current area of ​​the target road surface, move the test device to the next area for testing.

8. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 7 is characterized in that: Step S4 also includes: After completing the detection of the current area of ​​the target road surface, the telescopic push rod (15) is extended to raise the support structure, and after moving the test device to the next area, the telescopic push rod (15) is retracted to lower the support structure to a height of 50-60 cm from the target road surface.

9. The double-layer reinforcement CRCP construction test method for pavement cracks according to claim 7 is characterized in that: Step S5 includes: The damage and defect locations are determined based on the temperature difference areas in the temperature distribution, and the interface fullness quality is determined based on the heat accumulation formed in the gaps.

10. A construction method, characterized in that: The invention relates to a double-layer reinforcement CRCP construction test method for pavement cracks as described in any one of claims 1 to 9.

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