Model test device for performance test of soil base pavement of pavement-free airport
By using 3D printing technology and sensor systems to simulate aircraft landing, the problem of insufficient test data for airport runway pavement performance has been solved, providing accurate performance evaluation and maintenance support, thereby improving the overall quality of airport runways and flight safety.
Patent Information
- Application Number
- CN202423127432.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing technologies lack accurate data for testing airport runway pavement performance, leading to improper material selection, difficulty in controlling construction parameters, and blind maintenance work, which affects pavement quality and flight safety.
Using 3D printing technology to simulate aircraft landing trajectories, combined with a sensor system including earth pressure cells, resistive strain gauges, and laser displacement gauges, the system simulates aircraft loads and environmental factors under different conditions, providing accurate performance test data.
By simulating the aircraft landing process, accurate pavement performance data can be obtained to support airport runway design, construction, and maintenance, thereby improving pavement quality and flight safety.
Smart Images
Figure CN223664411U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing instruments, and in particular to a test device for testing the performance of unpaved airport subgrade pavement. Background Technology
[0002] With the rapid development of the global aviation industry, the demand for airport construction is constantly increasing. As one of the core facilities of an airport, the quality and safety of the runway are of paramount importance. Excellent runway performance not only improves airport operational efficiency but also directly affects aircraft takeoff and landing safety. In runway construction, the pavement performance of the subgrade is a key factor. It bears the impact pressure generated by aircraft takeoff and landing, playing a fundamental supporting role in the overall runway structure. Insufficient stability of the subgrade pavement can lead to problems such as cracks, depressions, and damage on the runway surface, thus affecting normal aircraft takeoff and landing, and even causing safety accidents. Therefore, strengthening the pavement performance testing of the subgrade is particularly urgent.
[0003] However, currently, research on airport runway pavement performance testing in China remains relatively limited. Furthermore, conducting airport runway pavement performance testing faces numerous thorny challenges. In-situ testing not only consumes significant human, financial, and material resources, but also poses a considerable safety hazard to pilots during the testing process. Consequently, there is a severe lack of accurate data and in-depth research from the testing phase throughout the entire process of airport runway development, from design to construction and subsequent maintenance.
[0004] The lack of such crucial data can leave airport runways without reliable test data to support their construction, making it difficult to effectively guarantee pavement quality. For example, in the selection of pavement materials, the lack of relevant test data to clarify the performance of different materials under various actual working conditions may lead to the selection of materials unsuitable for the airport's environment and operational requirements, thus affecting important performance indicators such as pavement durability and skid resistance. Regarding the determination of construction techniques, without test data as a reference, construction units cannot accurately grasp the optimal control range of key construction parameters such as compaction and smoothness, which undoubtedly creates hidden dangers for pavement construction quality. In the later maintenance phase, the lack of preliminary test data to predict and analyze pavement aging and wear will make maintenance work blind and untargeted, failing to prevent and effectively repair potential pavement problems in a timely manner, ultimately affecting the normal use of the airport runway and flight safety.
[0005] Therefore, it is particularly urgent to develop a comprehensive and scientific model testing device and method for airport runway pavement performance. Model testing has many irreplaceable advantages. It can simulate the working conditions of real airport runways to a certain extent, and obtain key data on pavement performance at a relatively low cost and with low risk through methods such as similarity ratios.
[0006] Unlike large-scale field tests, model tests allow for precise parameter adjustments and observations under controlled laboratory conditions. For example, they enable accurate control of simulated aircraft loads, testing of the pavement performance of different soil materials, replacement of track surface resistance materials, and monitoring of environmental factors such as temperature and humidity changes. This allows for in-depth research into the mechanisms by which these factors affect pavement structure and performance. This approach avoids the potential disruption to normal flight operations and pilot safety concerns associated with testing on actual airport runways, while providing invaluable reference data for airport runway design, construction, and maintenance. Utility Model Content
[0007] The purpose of this invention is to provide a test model for evaluating the performance of unpaved airport pavement. This device utilizes 3D printing technology to simulate the landing trajectories of different aircraft types and controls their landing speed, thereby reproducing the real-world landing scenario of an aircraft on an unpaved pavement. This allows for the examination of the impact of aircraft takeoff and landing on the unpaved pavement, which is of great significance for verifying the pavement's operational performance, improving the overall quality of airport runways, and ensuring flight safety.
[0008] To achieve the above objectives, this utility model provides a test device for a performance testing model of an unpaved airport subgrade pavement, including a prefabricated aircraft landing track with a slope at one end. A subgrade model test chamber is provided below the prefabricated aircraft landing track, and a first performance testing unit is provided inside the subgrade model test chamber. A first support is provided on the prefabricated aircraft landing track on one side of the slope, and a first slide rail is provided on the first support. A camera mounting bracket is provided on one side of the first slide rail, and a first protrusion is provided on the camera mounting bracket, with the first protrusion located inside the first slide rail.
[0009] Preferably, the prefabricated aircraft landing track includes a horizontal section and a ramp section.
[0010] Preferably, the first slide rail is located in the horizontal section, and the ramp and the first support are also located in the horizontal section.
[0011] Preferably, a second support is provided below the ramp section of the prefabricated aircraft landing track.
[0012] Preferably, the first performance testing unit is provided with at least one earth pressure cell, and at least one resistance strain gauge is provided on one or both sides of the earth pressure cell.
[0013] Preferably, the first bracket is located above the prefabricated aircraft landing track, and at least one laser displacement meter is provided on the first bracket. The camera mounting bracket is provided with a ramp section for the camera to face the prefabricated aircraft landing track.
[0014] Preferably, an aircraft model is set on the prefabricated aircraft landing track.
[0015] Preferably, the prefabricated aircraft landing track is provided with second slide rails on both sides, and the soil model test box is provided with second protrusions on both sides, with the second protrusions located inside the second slide rails.
[0016] Therefore, the technical effects of this utility model using the above-mentioned unpaved airport subgrade pavement performance testing model are as follows:
[0017] By simulating the actual aircraft landing process, this device can reproduce the stress conditions of unpaved airport pavement, thus providing reliable experimental data support for the performance evaluation of pavement materials.
[0018] Secondly, the various sensor systems and data acquisition systems in the device, such as earth pressure cells, resistance strain gauges, laser displacement gauges, and cameras, can comprehensively capture and analyze the stress, strain, displacement, cracks, and other states of the pavement, providing a scientific basis for pavement strength and stability.
[0019] Furthermore, this device can simulate different landing conditions by changing the surface resistance material, further enhancing the flexibility and applicability of the experiment. By comparing the changes in the CBR bearing ratio of a dirt runway before and after load impact, the test results provide a reference for pavement maintenance and repair decisions. Ultimately, through these integrated measurement and analysis methods, this invention provides accurate data and technical support for airport runway pavement performance testing and optimization. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a test model for testing the performance of unpaved airport subgrade pavement according to this utility model;
[0021] Figure 2 This is a partial schematic diagram of the test box of the test model device for testing the performance of unpaved airport subgrade pavement according to this utility model;
[0022] Figure 3 This is a partial schematic diagram of the first support of the test device for testing the performance of an unpaved airport subgrade pavement according to the present invention.
[0023] 1. 3D printed airplane model; 2. Prefabricated airplane landing track; 3. Second support; 4. Soil model test chamber; 5. Slope; 6. Soil pressure cell; 7. Resistance strain gauge; 8. First slide rail; 9. First support; 10. Laser displacement gauge; 11. Second slide rail; 12. Camera mount. Detailed Implementation
[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0025] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
[0026] Example 1
[0027] like Figure 1-3 As shown, a test device for testing the performance of unpaved airport subgrade pavement includes a prefabricated aircraft landing track 2, which includes a horizontal section and a ramp section, and a 3D printed aircraft model 1 is set on the prefabricated aircraft landing track 2.
[0028] The landing process of an aircraft is simulated by using a prefabricated track. The landing speed of the 3D printed aircraft model 1 is controlled by laying surface resistance material on the prefabricated aircraft landing track 2, so as to realize the function of simulating the real landing situation. The landing time of the aircraft can also be changed by changing the surface resistance material to change the friction coefficient.
[0029] A ramp 5 is provided at one end of the prefabricated aircraft landing track 2 to prevent the 3D printed aircraft model 1 from slipping. A soil model test chamber 4 is provided below the prefabricated aircraft landing track 2 to evaluate the performance of the pavement material under load. Second slide rails 11 are provided on both sides of the prefabricated aircraft landing track 2. Second protrusions are provided on both sides of the soil model test chamber 4, and the second protrusions are located inside the second slide rails 11.
[0030] The soil model test chamber 4 contains a first performance testing unit. A first support 9 is mounted on one side of the slope 5 onto a prefabricated aircraft landing track 2. A first slide rail 8 is mounted on the first support 9, and a camera mount 12 is mounted on one side of the first slide rail 8. The camera mount 12 has a first protrusion located within the first slide rail 8, thus enabling the camera to move left and right on the first support 9.
[0031] The first slide rail 8 is located in the horizontal section, and the ramp 5 and the first support 9 are also located in the horizontal section.
[0032] A second support 3 is installed below the ramp section of the prefabricated aircraft landing track 2.
[0033] The first performance testing unit is equipped with at least one earth pressure cell 6. The earth pressure cell 6 and the resistance strain gauge 7 are embedded inside the soil pavement. The earth pressure cell 6 is embedded at the four corners and the middle of the model box to measure the earth pressure distribution of the pavement under different loads in real time and provide accurate data support. The resistance strain gauge 7 is embedded on the left and right of the central earth pressure cell 6 to capture and analyze the strain changes of the pavement material.
[0034] The first support 9 is located above the prefabricated aircraft landing track 2. The first support 9 is a movable support. At least one laser displacement meter 10 is installed on the first support 9. In this embodiment, six laser displacement meters 10 and a camera that can move on the support are installed to form a sliding rail system, which has the function of comprehensively recording pavement settlement and surface cracks after a collision.
[0035] A camera is also installed on one side of the first support 9, facing the ramp section of the prefabricated aircraft landing track 2. A laser displacement meter 10 is used to test the settlement after the aircraft impact, and a photography system that can move with the slide rail to various parts of the model box can be preset to record the damage and crack state of the subgrade pavement after being affected by impact load, and analyzed by software such as PCAS.
[0036] The above settings enable this device to measure and record the stress, strain, temperature, humidity, displacement, crack condition, and CBR bearing ratio of the subgrade pavement.
[0037] Working principle: First, the model box is filled with soil, and when the soil is half full (this can be adjusted as needed), the earth pressure cell 6 and the resistance strain gauge 7 are installed. After the soil filling is completed, a camera is installed on the first support 9 of the model box, and all sensors and recording instruments are tested and calibrated. After this stage is completed, the California Bearing Ratio (CBR) test is performed on the soil track.
[0038] After testing, the 3D-printed aircraft model 1 was placed at the starting point of the prefabricated track. The gliding time and speed of the 3D-printed aircraft model 1 were controlled by laying specific resistance materials on the track surface. The 3D-printed aircraft model 1 glided on the track, eventually sliding off the track and onto the dirt runway until the model came to a complete stop.
[0039] After the 3D printing of the aircraft model 1 was completed, the model was removed and data recording began. Sensor readings were then converted from the earth pressure cell 6 into earth pressure values. Strain data of the soil runway was acquired using a resistance strain gauge 7, and readings from the laser displacement gauge 10 were recorded. Cracks and damage on the soil surface were photographed to provide a basis for subsequent PCAS crack analysis. Finally, the CBR bearing ratio test was performed again on the damaged soil to analyze the differences in values before and after the test.
[0040] Therefore, this utility model employs the aforementioned test model device for testing the performance of unpaved airport pavement, which can use 3D printing technology to simulate the landing trajectories of different aircraft types and control their landing speed, thereby reproducing the real-world scenario of an aircraft landing on an unpaved pavement. This allows for the examination of the impact of aircraft takeoff and landing on the unpaved pavement, which is of great significance for verifying the pavement's operational performance, improving the overall quality of airport runways, and ensuring flight safety.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.
Claims
1. A test model for testing the performance of unpaved airport subgrade pavement, characterized in that, The system includes a prefabricated aircraft landing track, one end of which is sloped. A soil model test chamber is installed below the prefabricated aircraft landing track. A first performance testing unit is installed inside the soil model test chamber. A first support is installed on the prefabricated aircraft landing track on one side of the slope. A first slide rail is installed on the first support. A camera mounting bracket is installed on one side of the first slide rail. A first protrusion is installed on the camera mounting bracket, and the first protrusion is located inside the first slide rail.
2. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, The prefabricated aircraft landing track includes a horizontal section and a ramp section.
3. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, The first slide rail is located in the horizontal section, and the ramp and the first support are also located in the horizontal section.
4. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, A second support is installed below the ramp section of the prefabricated aircraft landing track.
5. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, The first performance testing unit is equipped with at least one earth pressure cell, and at least one resistance strain gauge is provided on one or both sides of the earth pressure cell.
6. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, The first support is located above the prefabricated aircraft landing track, and at least one laser displacement meter is installed on the first support. The camera mount is provided with a ramp section for the camera to face the prefabricated aircraft landing track.
7. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, An airplane model is set on the prefabricated aircraft landing track.
8. The test model device for testing the performance of unpaved airport subgrade pavement according to claim 1, characterized in that, The prefabricated aircraft landing track is provided with second slide rails on both sides, and the soil model test box is provided with second protrusions on both sides, with the second protrusions located inside the second slide rails.