Simulation device for detecting stress state of semi-rigid base pavement
By designing a simulation device that includes a temperature simulation chamber, a heating and cooling mechanism, and a load simulation device, the problem of inaccurate simulation in existing technologies has been solved. This enables precise stress state simulation of semi-rigid base pavement, allowing for the evaluation of its durability and crack resistance. This provides a scientific basis for pavement design, extends pavement life, and improves safety.
Patent Information
- Application Number
- CN202422738075.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-11
AI Technical Summary
Existing simulation devices cannot accurately simulate the pavement stress state under different load and temperature conditions, affecting the durability and anti-reflective cracking ability assessment of semi-rigid base pavements, and failing to provide a scientific basis for pavement design and construction.
A simulation device was designed, comprising a temperature simulation chamber, heating and cooling mechanisms, a traffic load simulation device, a multi-point thin-film pressure testing sensor, and a fiber optic strain gauge, to accurately simulate the road surface stress state under load and temperature conditions. The accuracy and reliability of the changes are verified by collecting data from the sensors.
It enables accurate assessment of the durability and anti-reflective cracking ability of semi-rigid base pavements, providing a scientific basis to extend pavement service life and improve traffic safety and economy.
Smart Images
Figure CN223500784U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road engineering technology, specifically to a simulation device for detecting the stress state of semi-rigid base pavement. Background Technology
[0002] Given the specific circumstances of my country's transportation industry and the design concept of strong base and thin surface, semi-rigid base asphalt pavement is the main form of expressways and national and provincial trunk roads in my country. However, this pavement form has drawbacks such as reflective cracking, the formation and expansion of which are closely related to load and temperature stress. The simulation device for stress state detection of semi-rigid base pavement focuses on the monitoring and evaluation of stress state of semi-rigid base pavement.
[0003] Existing simulation devices are not suitable for accurately simulating the stress state of pavement under different load and temperature conditions, which affects the evaluation of the durability and anti-reflective cracking ability of semi-rigid base pavement. They cannot achieve a more accurate simulation of the stress state of semi-rigid base pavement, and thus cannot provide a scientific basis for pavement design and construction. Utility Model Content
[0004] The purpose of this invention is to provide a simulation device for detecting the stress state of semi-rigid base pavement, so as to improve the simulation device's ability to accurately simulate the stress state of pavement under different load and temperature conditions, to evaluate the durability and anti-reflective cracking ability of semi-rigid base pavement, and to achieve a more accurate simulation of the stress state of semi-rigid base pavement, providing a scientific basis for pavement design and construction, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a simulation device for detecting the stress state of semi-rigid base pavement, comprising a main body of the simulation device, an internal temperature simulation chamber, a temperature simulation heating mechanism embedded in the left side of the main body of the simulation device, a temperature simulation cooling mechanism embedded in the right side of the main body of the simulation device, a testing platform installed at the bottom of the inner wall of the temperature simulation chamber, a bearing groove provided at the top of the testing platform, a first multi-point thin-film pressure test sensor embedded at the bottom of the inner wall of the bearing groove, a semi-rigid base pavement testing block provided inside the bearing groove and above the first multi-point thin-film pressure test sensor, a fiber optic strain gauge pre-embedded inside the semi-rigid base pavement testing block, a second multi-point thin-film pressure test sensor embedded at the top of the semi-rigid base pavement testing block, a traffic load simulation application device installed at the top of the inner wall of the temperature simulation chamber, a temperature sensor installed on the back side of the inner wall of the temperature simulation chamber and near the testing platform, and a controller installed at the front right side of the main body of the simulation device.
[0006] Preferably, an observation cabinet door is installed on the front of the main body of the simulation device, and a discharge valve pipe is installed inside the temperature simulation chamber through the top of the main body of the simulation device.
[0007] Preferably, multiple fans are embedded in the left side of the temperature simulation heating mechanism, multiple electric heating tubes are installed inside the temperature simulation heating mechanism, and a first electric louver is embedded in the right side of the temperature simulation heating mechanism.
[0008] Preferably, a heat sink is installed inside the temperature simulation refrigeration mechanism, a refrigeration plate is installed on the left side of the heat sink, multiple cooling fans are installed through the right side of the inner wall of the temperature simulation refrigeration mechanism, a mounting bracket is provided inside the temperature simulation refrigeration mechanism and on the left side of the refrigeration plate, multiple exhaust fans are embedded in the right side of the mounting bracket, and a second motorized louver is embedded in the left side of the temperature simulation refrigeration mechanism.
[0009] Preferably, the controller is equipped with a display screen, multiple control buttons, and an alarm, and the controller is electrically connected to a temperature simulation heating mechanism, a temperature simulation cooling mechanism, a traffic load simulation application device, a first multi-point thin-film pressure test sensor, a second multi-point thin-film pressure test sensor, a fiber optic strain gauge, and a temperature sensor.
[0010] Preferably, the traffic load simulation application device includes an actuator fixedly connected to the top of the inner wall of the temperature simulation chamber. A telescopic frame is installed at the bottom of the actuator, and a mounting base is installed at the bottom of the telescopic frame. A dual-axis motor is installed inside the mounting base. Load rollers are rotatably connected to the two output ends of the dual-axis motor through the two sides of the mounting base. A pressure sensor and a displacement sensor are sequentially embedded at the bottom of the mounting base.
[0011] Beneficial Effects: This invention addresses the problem that existing simulation devices are inconvenient for accurately simulating pavement stress states under different load and temperature conditions, thus affecting the evaluation of the durability and anti-reflective cracking ability of semi-rigid base pavements. Furthermore, they fail to accurately simulate the stress state of semi-rigid base pavements, hindering the provision of scientific basis for pavement design and construction. This invention addresses this issue by incorporating a temperature simulation chamber with a temperature sensor, a temperature simulation heating mechanism, and a temperature simulation cooling mechanism. This facilitates precise temperature control to simulate the required temperature conditions, allowing for comparison of changes in pavement structural stress states under different temperature environments. The accuracy and reliability of pavement stress state changes under temperature variations are verified through actual collected temperature data. The traffic load simulation application device sets different load conditions, including load magnitude and application time, based on actual traffic conditions and pavement design standards. These load conditions simulate the impact of different traffic flows and vehicle types on semi-rigid base pavement test blocks. Meanwhile, the fiber optic strain gauge installed inside the semi-rigid base pavement testing block is used to visually detect the stress and strain development inside the pavement structure. The first and second multi-point thin-film pressure testing sensors, characterized by high precision, high reliability, and rapid response, accurately reflect the pressure state inside the pavement structure. This facilitates real-time monitoring and analysis of pressure changes within the pavement structure, enabling timely detection of pavement defects and the implementation of corresponding maintenance measures. This extends the pavement's service life and improves the safety and economy of transportation. Furthermore, by simulating the pavement stress state under different load and temperature conditions, the durability and anti-reflective cracking ability of the semi-rigid base pavement can be evaluated. This invention is not only simple in structure but also accurately simulates the pavement stress state under different load and temperature conditions to evaluate the durability and anti-reflective cracking ability of the semi-rigid base pavement, providing a more accurate simulation of the stress state of the semi-rigid base pavement and offering a scientific basis for pavement design and construction. It is highly practical. Attached Figure Description
[0012] Figure 1 This is a three-dimensional view of the present invention.
[0013] Figure 2 This is the overall front view of this utility model.
[0014] Figure 3 This is a schematic diagram of the overall internal structure of this utility model from the front view.
[0015] Figure 4 This is a schematic diagram of the traffic load simulation application device in this utility model.
[0016] Figure 5 This is a schematic diagram of a partially disassembled structure in this utility model.
[0017] Figure Descriptions: 1. Main body of the simulation device; 11. Temperature simulation chamber; 111. Observation cabinet door; 112. Discharge valve pipe; 2. Temperature simulation heating mechanism; 21. Fan; 22. Electric heating tube; 23. First electric louver; 3. Temperature simulation cooling mechanism; 31. Heat sink; 32. Cooling plate; 33. Cooling fan; 34. Mounting frame; 35. Exhaust fan; 36. Second electric louver; 4. Controller; 5. Testing table; 51. Bearing groove; 6. Traffic load simulation application device; 61. Actuator; 62. Telescopic frame; 63. Mounting base; 64. Dual-axis motor; 65. Load roller; 66. Pressure sensor; 67. Displacement sensor; 7. First multi-point thin-film pressure test sensor; 8. Semi-rigid base pavement test block; 9. Second multi-point thin-film pressure test sensor; 10. Fiber optic strain gauge; 100. Temperature sensor. Detailed Implementation
[0018] Please see Figure 1-5 This utility model discloses a simulation device for detecting the stress state of semi-rigid base pavement, comprising a simulation device body 1, a temperature simulation chamber 11 inside the simulation device body 1, an observation cabinet door 111 installed on the front of the simulation device body 1, a discharge valve pipe 112 installed inside the temperature simulation chamber 11 through the top of the simulation device body 1, a temperature simulation heating mechanism 2 installed inside the temperature simulation chamber 11 on the left side of the simulation device body 1, a temperature simulation cooling mechanism 3 installed inside the temperature simulation chamber 11 on the right side of the simulation device body 1, and a controller 4 installed on the front right side of the simulation device body 1.
[0019] Specifically, multiple fans 21 are embedded on the left side of the temperature simulation heating mechanism 2, multiple electric heating tubes 22 are installed inside the temperature simulation heating mechanism 2, and a first electric louver 23 is embedded on the right side of the temperature simulation heating mechanism 2. A heat sink 31 is installed inside the temperature simulation cooling mechanism 3, a cooling plate 32 is installed on the left side of the heat sink 31, multiple cooling fans 33 are installed through the right side of the inner wall of the temperature simulation cooling mechanism 3, a mounting bracket 34 is set inside the temperature simulation cooling mechanism 3 and to the left of the cooling plate 32, multiple exhaust fans 35 are embedded on the right side of the mounting bracket 34, and a second electric louver 36 is embedded on the left side of the temperature simulation cooling mechanism 3. A temperature sensor 100 is installed on the back of the inner wall of the temperature simulation cavity 11 and on the side close to the detection platform 5. By setting up a temperature simulation cavity 11 with a temperature sensor 100, a temperature simulation heating mechanism 2, and a temperature simulation cooling mechanism 3, it is convenient to accurately control the temperature to simulate the required temperature conditions, thereby facilitating the comparison and simulation of the changes in the stress state of the road structure under different temperature environments. The accuracy and reliability of the data on the changes in the stress state of the road under temperature changes can be verified by the actual collected temperature data.
[0020] A testing platform 5 is installed at the bottom of the inner wall of the temperature simulation chamber 11. A bearing groove 51 is provided at the top of the testing platform 5. A first multi-point thin-film pressure test sensor 7 is embedded at the bottom of the inner wall of the bearing groove 51. A semi-rigid base road surface testing block 8 is provided inside the bearing groove 51 and above the first multi-point thin-film pressure test sensor 7. A fiber optic strain gauge 10 is pre-embedded inside the semi-rigid base road surface testing block 8. A second multi-point thin-film pressure test sensor 9 is embedded at the top of the semi-rigid base road surface testing block 8. A traffic load simulation application device 6 is installed at the top of the inner wall of the temperature simulation chamber 11. The traffic load simulation application device 6 includes an actuator 61 fixedly connected to the top of the inner wall of the temperature simulation chamber 11. A telescopic frame 62 is installed at the bottom of the actuator 61, and a mounting base 63 is installed at the bottom of the telescopic frame 62. A dual-axis motor 64 is installed inside the mounting base 63. Load rollers 65 are rotatably connected to the two output ends of the dual-axis motor 64 through the two sides of the mounting base 63. A pressure sensor 66 and a displacement sensor 67 are sequentially embedded at the bottom of the mounting base 63. The controller 4 is equipped with a display screen, multiple control buttons, and an alarm. The controller 4 is connected to the temperature simulation heating mechanism 2 and the temperature simulation cooling mechanism 2. The device 3, traffic load simulation application device 6, first multi-point thin-film pressure test sensor 7, second multi-point thin-film pressure test sensor 9, fiber optic strain gauge 10, and temperature sensor 100 are electrically connected. The traffic load simulation application device 6 sets different load conditions, including load magnitude and load duration, according to actual traffic conditions and road design standards. These load conditions can simulate the impact of different traffic flows and vehicle types on the semi-rigid base pavement test block 8. Simultaneously, the fiber optic strain gauge 10 installed within the semi-rigid base pavement test block 8 is used to visually detect the stress and strain development within the pavement structure. The first and second multi-point thin-film pressure test sensors 7 and 9, with their high precision, high reliability, and rapid response, can accurately reflect the pressure state within the pavement structure. This facilitates real-time monitoring and analysis of pressure changes within the pavement structure, enabling timely detection of pavement defects and implementation of corresponding maintenance measures. This extends the service life of the pavement and improves the safety and economy of transportation. Ultimately, by simulating the pavement stress state under different load and temperature conditions, the durability and anti-reflective cracking ability of the semi-rigid base pavement can be evaluated.
[0021] In summary, this invention not only has a simple structure, but also evaluates the durability and anti-reflective cracking ability of semi-rigid base pavement by accurately simulating the stress state of the pavement under different load and temperature conditions. This allows for a more accurate simulation of the stress state of semi-rigid base pavement, providing a scientific basis for pavement design and construction, and is therefore very practical.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A simulation device for detecting the stress state of semi-rigid base pavement, comprising a main body of the simulation device (1), characterized in that... The simulation device body (1) has a temperature simulation chamber (11) inside. A temperature simulation heating mechanism (2) is installed inside the temperature simulation chamber (11) on the left side of the simulation device body (1), and a temperature simulation cooling mechanism (3) is installed inside the temperature simulation chamber (11) on the right side of the simulation device body (1). A detection platform (5) is installed at the bottom of the inner wall of the temperature simulation chamber (11), and a bearing groove (51) is provided at the top of the detection platform (5). A first multi-point thin film pressure test sensor (7) is embedded at the bottom of the inner wall of the bearing groove (51). The bearing groove (51) is located inside and within the... A semi-rigid base road surface detection block (8) is provided on the top of the first multi-point thin film pressure test sensor (7). A fiber optic strain gauge (10) is pre-embedded inside the semi-rigid base road surface detection block (8). A second multi-point thin film pressure test sensor (9) is embedded on the top of the semi-rigid base road surface detection block (8). A traffic load simulation application device (6) is installed on the top of the inner wall of the temperature simulation cavity (11). A temperature sensor (100) is installed on the back side of the inner wall of the temperature simulation cavity (11) and on the side close to the test platform (5). A controller (4) is installed on the right front edge of the main body (1) of the simulation device.
2. The simulation device for detecting the stress state of semi-rigid base pavement according to claim 1, characterized in that: The front of the main body (1) of the simulation device is equipped with an observation cabinet door (111), and the top of the main body (1) of the simulation device is equipped with a discharge valve pipe (112) that runs through the temperature simulation chamber (11).
3. The simulation device for detecting the stress state of semi-rigid base pavement according to claim 1, characterized in that: Multiple fans (21) are embedded on the left side of the temperature simulation heating mechanism (2), multiple electric heating tubes (22) are installed inside the temperature simulation heating mechanism (2), and a first electric louver (23) is embedded on the right side of the temperature simulation heating mechanism (2).
4. The simulation device for detecting the stress state of semi-rigid base pavement according to claim 1, characterized in that: The temperature simulation refrigeration mechanism (3) is equipped with a heat sink (31) inside. A cooling plate (32) is installed on the left side of the heat sink (31). Multiple cooling fans (33) are installed through the right side of the inner wall of the temperature simulation refrigeration mechanism (3). An installation frame (34) is provided inside the temperature simulation refrigeration mechanism (3) and on the left side of the cooling plate (32). Multiple exhaust fans (35) are embedded in the right side of the installation frame (34). A second electric louver (36) is embedded in the left side of the temperature simulation refrigeration mechanism (3).
5. The simulation device for detecting the stress state of semi-rigid base pavement according to claim 1, characterized in that: The controller (4) is equipped with a display screen, multiple control buttons, and an alarm. The controller (4) is electrically connected to the temperature simulation heating mechanism (2), the temperature simulation cooling mechanism (3), the traffic load simulation application device (6), the first multi-point thin film pressure test sensor (7), the second multi-point thin film pressure test sensor (9), the fiber optic strain gauge (10), and the temperature sensor (100).
6. The simulation device for detecting the stress state of semi-rigid base pavement according to claim 1, characterized in that: The traffic load simulation application device (6) includes an actuator (61) fixedly connected to the top of the inner wall of the temperature simulation chamber (11). A telescopic frame (62) is installed at the bottom of the actuator (61). A mounting base (63) is installed at the bottom of the telescopic frame (62). A dual-axis motor (64) is installed inside the mounting base (63). Load rollers (65) are rotatably connected to the two output ends of the dual-axis motor (64) through the two sides of the mounting base (63). A pressure sensor (66) and a displacement sensor (67) are sequentially embedded at the bottom of the mounting base (63).