CN112881214A - Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment - Google Patents
Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment Download PDFInfo
- Publication number
- CN112881214A CN112881214A CN202110049453.3A CN202110049453A CN112881214A CN 112881214 A CN112881214 A CN 112881214A CN 202110049453 A CN202110049453 A CN 202110049453A CN 112881214 A CN112881214 A CN 112881214A
- Authority
- CN
- China
- Prior art keywords
- mechanical loading
- test piece
- asphalt mixture
- servo hydraulic
- pressure environment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
- G01N2203/0007—Low frequencies up to 100 Hz
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a dynamic water pressure environment synchronous high-frequency mechanical loading test system, and belongs to the technical field of road engineering material performance tests. The system comprises a servo hydraulic power device, a hydrodynamic pressure environment generating device, a mechanical loading rod applying device, an asphalt mixture test piece mechanical testing device, an asphalt mixture test piece health preserving device and a water environment temperature control device. The invention adopts a control system to simultaneously drive two servo hydraulic actuators to load, the piston reciprocates along the vertical direction to form a dynamic water pressure environment, and the mechanical loading rod carries out synchronous mechanical loading on an asphalt mixture test piece, thereby considering the complex working conditions of coupling of multiple factors such as water, temperature, dynamic water pressure, vehicle load and the like, realizing the monitoring and evaluation of the whole process of the performance evolution of the material under the dynamic water pressure environment, and more truly simulating and quantitatively evaluating the specific influence of the dynamic water pressure environment caused by vehicle tires on the asphalt pavement.
Description
Technical Field
The invention relates to the technical field of road engineering material performance testing, in particular to a synchronous high-frequency mechanical loading test system for a hydrodynamic pressure environment.
Background
The service environment of the asphalt pavement is a complex natural environment which is completely exposed to coupling of multiple factors such as temperature, rainfall, vehicle load and the like. When a vehicle runs on an asphalt pavement with water accumulated on the surface, the asphalt film is caused to peel off from the aggregate surface due to a high-frequency positive-negative alternative dynamic water pressure environment generated by repeated extrusion and suction of tires, so that water damage is caused, the service quality of the asphalt pavement is reduced, and the service life is shortened. The typical asphalt pavement service environment is simulated by adopting a proper test device and a proper test method, and the water damage resistance of the material is further evaluated, which is an indispensable link in the design of the asphalt pavement material.
In the existing research aiming at the water damage of the asphalt mixture, a test piece is generally placed in a dynamic water pressure environment for curing, the deterioration of a material is accelerated, and the water damage resistance of the test piece is evaluated by comparing the material performance change difference before and after curing. The above conventional method mainly has two problems: (1) the traditional method is to compare the initial state of an asphalt mixture test piece with the final state after water damage, namely the performance comparison at two moments, and cannot evaluate the performance evolution rule of the material in the whole service period; (2) in the traditional method, an asphalt mixture test piece is singly placed in a dynamic water pressure environment for curing, and the mechanical load is not directly acted on the test piece, which is essentially different from the actual service working condition that an asphalt pavement directly bears the vehicle load. Therefore, in order to evaluate the service performance evolution process of the asphalt mixture material bearing the vehicle load in the water environment, it is necessary to bring the mechanical load into the water environment for synchronous loading. There are related researches to immerse a test piece in a static water environment for mechanical loading, but the hydrodynamic pressure effect simulated by the static immersion environment is very limited.
Therefore, in order to simulate the service environment of the hydrodynamic pressure generated by the vehicle tire acting on the asphalt pavement more truly and evaluate the whole-process performance evolution law of the asphalt mixture, it is necessary to develop a synchronous high-frequency mechanical loading test system which comprehensively considers the coupling of various environmental factors such as water, temperature and the hydrodynamic pressure, and provide a matched test method.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dynamic water pressure environment synchronous high-frequency mechanical loading test system which can simulate the dynamic water pressure environment generated by a vehicle tire acting on an asphalt pavement more truly and evaluate the whole process performance evolution rule of an asphalt mixture material.
The system comprises a servo hydraulic power device, a hydrodynamic pressure environment generating device, a mechanical loading rod applying device, an asphalt mixture test piece mechanical testing device, an asphalt mixture test piece curing device and a water environment temperature control device, wherein the devices are connected with one another according to the position relationship from top to bottom and from outside to inside and are fixed on a system frame; the servo hydraulic power device comprises a control and data acquisition system, a servo hydraulic station, a 1# servo hydraulic actuator and a 2# servo hydraulic actuator, wherein the control and data acquisition system is used for realizing the connection and control of the servo hydraulic station through a cable, and the servo hydraulic station is connected with the 1# servo hydraulic actuator and the 2# servo hydraulic actuator through an oil inlet guide pipe and an oil return guide pipe; the dynamic water pressure environment generating device is fixed on the upper portion of the left side of the system frame through a sealing gasket and a nut, the dynamic water pressure environment generating device comprises a piston, a piston sliding rail sleeve and a piston sleeve seat, the piston is arranged in the piston sliding rail sleeve, the piston sliding rail sleeve is installed on the piston sleeve seat, the bottom of the piston is in a groove shape, an air valve is arranged at the axis, and the No. 1 servo hydraulic actuator is connected with the piston through a bolt; the mechanical loading rod applying device is fixed on the upper part of the right side of the system frame through a sealing gasket and a nut, the mechanical loading rod applying device comprises a mechanical loading rod, a sealing ring and a sliding sleeve seat, the sealing ring is arranged between the mechanical loading rod and the sliding sleeve seat, and the mechanical loading rod is connected with a No. 2 servo hydraulic actuator through a bolt; the mechanical testing device for the asphalt mixture test piece is connected with the bottom of the system frame through a fixing nut, the mechanical testing device for the asphalt mixture test piece comprises a base, a guide rail, a mechanical loading pressure head, a mechanical loading support, a fixing clamp, a clamping clamp, a strain sensor and the asphalt mixture test piece, the mechanical loading support is fixed at the central position of the base through a bolt, the asphalt mixture test piece is placed between the mechanical loading pressure head and the mechanical loading support, the clamping clamp is adhered to the side wall of the asphalt mixture test piece through epoxy resin, a mechanical loading rod is directly contacted with the mechanical loading pressure head and applies mechanical load to the asphalt mixture test piece, monitoring the strain response condition of the material through a strain sensor fixed in a clamping fixture, wherein the clamping fixture is connected with a fixed fixture through a screw rod, the fixed fixture is clamped on a guide rail, and the guide rail is fixed on a base through a nut; the asphalt mixture test piece curing device is positioned at the bottom of the system frame, and directly bears the erosion curing of a dynamic water pressure environment by placing the asphalt mixture test piece on the support frame; the water environment temperature control device comprises a heater positioned in the system frame, and a water injection port, a water outlet and a water valve which are positioned on two sides of the bottom of the system frame, wherein the water injection port and the water blowing port are respectively provided with a water valve.
Wherein, the frame is externally provided with a heat-insulating layer.
The control and data acquisition system simultaneously carries out independent regulation and control on the 1# servo hydraulic actuator and the 2# servo hydraulic actuator, and synchronous or asynchronous driving of the piston and the mechanical loading rod is realized.
A temperature sensor and a water pressure sensor are fixed on the upper portion of the right side of the frame, and the temperature of the water environment inside the test system and the change condition of the pore water pressure are monitored respectively.
The diameter of the asphalt mixture test piece is 100mm, the height of the asphalt mixture test piece is 150mm, and the pre-pressing load applied to the asphalt mixture test piece through the mechanical loading rod is 50-200N.
The technical scheme of the invention has the following beneficial effects:
(1) the invention adopts a control and data acquisition system to simultaneously drive two servo hydraulic actuators to work, can realize synchronous mechanical loading on an asphalt mixture test piece while forming a running water pressure environment, really considers the complex working conditions of coupling of multiple factors such as water, temperature, running water pressure, vehicle load and the like, can realize high frequency with loading frequency at least reaching more than 10Hz in a direct action mode of the servo hydraulic actuators, and has the advantages of test simulation environment approximate to the actual working conditions and real and accurate test results.
(2) According to the invention, the mechanical loading is directly carried out on the asphalt mixture in the dynamic water pressure environment, and the evolution rule of the performance parameters of the material in the whole test process can be monitored in real time through the obtained stress and strain data, so that the limitation that the traditional method can only evaluate the performance state of the material before and after water is kept is broken.
(3) The support frame is arranged to preserve the asphalt mixture test piece, so that the asphalt mixture test piece can be used as a comparison group for loading the test piece mechanically on one hand, and can be used for other test purposes such as monitoring of the water pressure evolution characteristic inside the test piece on the other hand, and therefore the test system has richer functions.
(4) The mechanical testing device for the asphalt mixture test piece is in a modular design, and the device and the disassembly can be completed outside a testing system, so that the testing operation process is more convenient and faster.
Drawings
FIG. 1 is a schematic structural diagram of a dynamic water pressure environment synchronous high-frequency mechanical loading test system of the present invention;
FIG. 2 is a top view of a mechanical loading test system for an asphalt mixture test piece in an embodiment of the invention.
Wherein: 1-a servo hydraulic station; 2-control and data acquisition system; 3-1# servo hydraulic actuator; 4-2# servo hydraulic actuator; 5-a frame; 6-insulating layer; 7-water outlet; 8-water injection port; 9-a water valve; 10-a piston sleeve seat; 11-a seal gasket; 12-a nut; 13-a piston; 14-a bolt; 15-piston slide rail sleeve; 16-a gas valve; 17-sliding sleeve seat; 18-a sealing ring; 19-a mechanical loading rod; 20-a base; 21-a guide rail; 22-bituminous mixture test piece; 23-mechanical loading support; 24-a mechanical loading ram; 25-a clamping fixture; 26-a strain sensor; 27-fixing the clamp; 28-screw rod; 29-a fixing nut; 30-a support frame; 31-a heater; 32-a temperature sensor; 33-water pressure sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a dynamic water pressure environment synchronous high-frequency mechanical loading test system.
As shown in fig. 1, the system comprises a servo hydraulic power device, a hydrodynamic pressure environment generating device, a mechanical loading rod applying device, an asphalt mixture test piece mechanical testing device, an asphalt mixture test piece curing device and a water environment temperature control device, wherein the devices are connected with each other and fixed on a system frame 5 from top to bottom and from outside to inside; the servo hydraulic power device comprises a control and data acquisition system 2, a servo hydraulic station 1, a No. 1 servo hydraulic actuator 3 and a No. 2 servo hydraulic actuator 4, wherein the control and data acquisition system 2 realizes connection and control of the servo hydraulic station 1 through a cable, and the servo hydraulic station 1 is connected with the No. 1 servo hydraulic actuator 3 and the No. 2 servo hydraulic actuator 4 through an oil inlet guide pipe and an oil return guide pipe; the hydrodynamic pressure environment generating device is fixed on the upper portion of the left side of the system frame 5 through a sealing gasket 11 and a nut 12, the hydrodynamic pressure environment generating device comprises a piston 13, a piston slide rail sleeve 15 and a piston sleeve seat 10, the piston 13 is arranged in the piston slide rail sleeve 15, the piston slide rail sleeve 15 is installed on the piston sleeve seat 10, the bottom of the piston 13 is in a groove shape, an air valve 16 is arranged at the axis, and the No. 1 servo hydraulic actuator 3 is connected with the piston 13 through a bolt 14; the mechanical loading rod applying device is fixed on the upper portion of the right side of the system frame 5 through a sealing gasket 11 and a nut 12, the mechanical loading rod applying device comprises a mechanical loading rod 19, a sealing ring 18 and a sliding sleeve seat 17, the sealing ring 18 is arranged between the mechanical loading rod 19 and the sliding sleeve seat 17, and the mechanical loading rod 19 is connected with the # 2 servo hydraulic actuator 4 through a bolt 14; the mechanical testing device for the asphalt mixture test piece is connected with the bottom of the system frame 5 through a fixing nut 29, and comprises a base 20, a guide rail 21, a mechanical loading pressure head 24, a mechanical loading support 23, a fixing clamp 27, a clamping clamp 25, a strain sensor 26 and the asphalt mixture test piece 22, wherein the mechanical loading support 23 is fixed at the central position of the base 20 through a bolt, the asphalt mixture test piece 22 is placed between the mechanical loading pressure head 24 and the mechanical loading support 23, the clamping clamp 25 is adhered to the side wall of the asphalt mixture test piece 22 through epoxy resin, the mechanical loading rod 19 is directly contacted with the mechanical loading pressure head 24 and applies mechanical load to the asphalt mixture test piece 22, the strain response condition of the material is monitored through the strain sensor 26 fixed inside the clamping clamp 25, as shown in figure 2, the clamping clamp 25 is connected with the fixing clamp 27 through a screw 28, the fixing clamp 27 is clamped on the guide rail 21, and the guide rail 21 is fixed on the base 20 through a nut; the asphalt mixture test piece curing device is positioned at the bottom of the system frame 5, and directly bears the erosion curing of the dynamic water pressure environment by placing the asphalt mixture test piece 22 on the support frame 30; the water environment temperature control device comprises a heater 31 positioned inside the system frame 5, and a water injection port 8, a water outlet 7 and a water valve 9 which are positioned on two sides of the bottom of the system frame 5, wherein the water injection port 8 and the water blowing port 7 are respectively provided with the water valve 9.
Wherein, the frame 5 is externally provided with an insulating layer 6.
The control and data acquisition system 2 simultaneously and independently regulates and controls the No. 1 servo hydraulic actuator 3 and the No. 2 servo hydraulic actuator 4, and realizes synchronous or asynchronous driving of the piston 13 and the mechanical loading rod 19.
A temperature sensor 32 and a water pressure sensor 33 are fixed on the upper portion of the right side of the frame 5, and the temperature of the water environment inside the test system and the change condition of the pore water pressure are monitored respectively.
In the specific implementation process, the test steps are as follows:
(1) adhering the clamping fixture 25 to the surface of the cylindrical asphalt mixture test piece 22 by using epoxy resin, and mounting a strain sensor 26; placing the asphalt mixture test piece 22 between a mechanical loading support 23 and a mechanical loading pressure head 24, and then connecting and fixing a clamping fixture 25 and a fixing fixture 27 with each other through a screw 28; meanwhile, another asphalt mixture test piece 22 is placed on the support frame 30, and dynamic water pressure environment health preservation is carried out to be used as a control group; adjusting the mechanical loading rod 19 to be in contact with the mechanical loading pressure head 24, and applying and maintaining a certain load for pre-pressing;
(2) closing the water valve 9 at the water outlet 7, respectively opening the water valve 9 at the water injection port 8 and the air valve 16 at the piston 13, and continuously injecting water with preset test temperature into the test system through the water injection port 8, wherein air in the test system is gradually discharged at the air valve 16 of the piston 13; when water overflows from the air valve 16 at the piston 13, closing the air valve 16;
(3) the piston 13 is driven to slowly move up and down by adjusting the No. 1 servo hydraulic actuator 3, then the piston 13 is stopped at the balance position, the air valve 16 is opened until water overflows, at the moment, the air in the test system is exhausted, and the air valve 16 and the water valve 9 at the water injection port 8 are closed in sequence;
(4) the regulation control system 2 drives the 1# servo hydraulic actuator 3 and the 2# servo hydraulic actuator 4 to be loaded simultaneously by controlling the servo hydraulic station 1; by controlling the amplitude and frequency of the reciprocating motion of the piston 13 along the vertical direction, the dynamic water pressure environment with different magnitudes can be simulated; by controlling the magnitude and frequency of the load applied by the mechanical loading rod 19, the traffic load application of different working conditions on the asphalt mixture test piece 22 can be simulated; the temperature sensor 32 and the water pressure sensor 33 respectively monitor the temperature and water pressure change conditions of the water environment in real time, and the strain sensor 26 monitors the strain response condition of the asphalt mixture test piece 22 in the mechanical loading process;
(5) monitoring the stress and strain response conditions of the synchronous mechanical loading of the asphalt mixture test piece 22 in the dynamic water pressure environment in real time through the data acquisition system 2; after the test is finished, the water valve 9 at the water outlet 7 is opened, the test piece 22 can be taken out after water is drained, and meanwhile data analysis is carried out.
According to the mode, the invention can be better realized, the control system 2 is adopted to simultaneously drive the two servo hydraulic actuators 3 and 4 to load, the piston 13 reciprocates along the vertical direction to form a dynamic water pressure environment, the mechanical loading rod 19 carries out synchronous mechanical loading on the asphalt mixture test piece 22, the complex working conditions of coupling of multiple factors such as water, temperature, dynamic water pressure, vehicle load and the like are really considered, the monitoring and evaluation of the whole performance evolution process of the material in the dynamic water pressure environment are realized, and the specific influence of the dynamic water pressure environment caused by vehicle tires on the asphalt pavement is more truly simulated and quantitatively evaluated. The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention (for example, the larger stroke of the piston 13 can obtain a larger hydrodynamic pressure), and therefore, all the modifications of the specimen size and the cyclic mechanical load applying mode according to the present invention are covered by the scope of the present invention as claimed in the appended claims.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a synchronous high frequency mechanics loading test system of hydrodynamic pressure environment which characterized in that: the system comprises a servo hydraulic power device, a hydrodynamic pressure environment generating device, a mechanical loading rod applying device, an asphalt mixture test piece mechanical testing device, an asphalt mixture test piece curing device and a water environment temperature control device, wherein the devices are connected with one another and fixed on a system frame (5) according to the position relationship from top to bottom and from outside to inside; the servo hydraulic power device comprises a control and data acquisition system (2), a servo hydraulic station (1), a 1# servo hydraulic actuator (3) and a 2# servo hydraulic actuator (4), wherein the control and data acquisition system (2) realizes connection and control of the servo hydraulic station (1) through a cable, and the servo hydraulic station (1) is connected with the 1# servo hydraulic actuator (3) and the 2# servo hydraulic actuator (4) through an oil inlet guide pipe and an oil return guide pipe; the hydrodynamic pressure environment generating device is fixed on the upper portion of the left side of a system frame (5) through a sealing gasket (11) and a nut (12), the hydrodynamic pressure environment generating device comprises a piston (13), a piston sliding rail sleeve (15) and a piston sleeve seat (10), the piston (13) is arranged in the piston sliding rail sleeve (15), the piston sliding rail sleeve (15) is installed on the piston sleeve seat (10), the bottom of the piston (13) is in a groove shape, an air valve (16) is arranged at the axis, and a No. 1 servo hydraulic actuator (3) is connected with the piston (13) through a bolt (14); the mechanical loading rod applying device is fixed to the upper portion of the right side of the system frame (5) through a sealing gasket (11) and a nut (12), the mechanical loading rod applying device comprises a mechanical loading rod (19), a sealing ring (18) and a sliding sleeve seat (17), the sealing ring (18) is arranged between the mechanical loading rod (19) and the sliding sleeve seat (17), and the mechanical loading rod (19) is connected with a 2# servo hydraulic actuator (4) through a bolt (14); the mechanical testing device for the asphalt mixture test piece is connected with the bottom of a system frame (5) through a fixing nut (29), and comprises a base (20), a guide rail (21), a mechanical loading pressure head (24), a mechanical loading support (23), a fixing clamp (27), a clamping clamp (25), a strain sensor (26) and the asphalt mixture test piece (22), wherein the mechanical loading support (23) is fixed at the central position of the base (20) through a bolt, the asphalt mixture test piece (22) is placed between the mechanical loading pressure head (24) and the mechanical loading support (23) and is adhered to the side wall of the asphalt mixture test piece (22) through the clamping clamp (25) by epoxy resin, the mechanical loading rod (19) is directly contacted with the mechanical loading pressure head (24) and applies mechanical load to the asphalt mixture test piece (22), and the strain response condition of the material is monitored through the strain sensor (26) fixed inside the clamping clamp (25) The clamping fixture (25) is connected with a fixing fixture (27) through a screw rod (28), the fixing fixture (27) is clamped on the guide rail (21), and the guide rail (21) is fixed on the base (20) through a nut; the asphalt mixture test piece curing device is positioned at the bottom of the system frame (5), and the asphalt mixture test piece (22) is placed on the support frame (30) to directly bear the erosion curing of the dynamic water pressure environment; the water environment temperature control device comprises a heater (31) positioned inside a system frame (5), and a water injection port (8), a water outlet (7) and a water valve (9) which are positioned on two sides of the bottom of the system frame (5), wherein the water injection port (8) and the water blowing port (7) are respectively provided with the water valve (9).
2. The dynamic water pressure environment synchronous high-frequency mechanical loading test system according to claim 1, characterized in that: and a heat-insulating layer (6) is arranged outside the frame (5).
3. The dynamic water pressure environment synchronous high-frequency mechanical loading test system according to claim 1, characterized in that: the control and data acquisition system (2) simultaneously independently regulates and controls the 1# servo hydraulic actuator (3) and the 2# servo hydraulic actuator (4), and realizes synchronous or asynchronous driving of the piston (13) and the mechanical loading rod (19).
4. The dynamic water pressure environment synchronous high-frequency mechanical loading test system according to claim 1, characterized in that: and a temperature sensor (32) and a water pressure sensor (33) are fixed on the upper part of the right side of the frame (5) and are used for respectively monitoring the temperature of the water environment in the test system and the change condition of the pore water pressure.
5. The dynamic water pressure environment synchronous high-frequency mechanical loading test system according to claim 1, characterized in that: the diameter of the asphalt mixture test piece (22) is 100mm, the height of the asphalt mixture test piece is 150mm, and the pre-pressing load applied to the asphalt mixture test piece (22) through the mechanical loading rod (19) is 50-200N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110049453.3A CN112881214B (en) | 2021-01-14 | 2021-01-14 | Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110049453.3A CN112881214B (en) | 2021-01-14 | 2021-01-14 | Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112881214A true CN112881214A (en) | 2021-06-01 |
| CN112881214B CN112881214B (en) | 2022-02-11 |
Family
ID=76049108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110049453.3A Active CN112881214B (en) | 2021-01-14 | 2021-01-14 | Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112881214B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106610363A (en) * | 2017-02-27 | 2017-05-03 | 北京科技大学 | Multifunctional asphalt mixture dynamic water scouring test device and test method |
| CN106959253A (en) * | 2017-05-27 | 2017-07-18 | 长安大学 | A kind of asphalt moves water salt corrosion test device and test method |
| WO2017121357A1 (en) * | 2016-01-13 | 2017-07-20 | 长沙理工大学 | Asphalt pavement pore water pressure simulation test device and method |
| CN107063884A (en) * | 2016-12-15 | 2017-08-18 | 东南大学 | A kind of lower experimental provision and test method for evaluating porous asphalt pavement high-temperature behavior of multi- scenarios method effect |
| CN107748134A (en) * | 2017-11-30 | 2018-03-02 | 北京科技大学 | A kind of asphalt mixture hydrodynamic pressure choice and creation of healthy environment system and test method |
| CN108333051A (en) * | 2018-01-16 | 2018-07-27 | 长安大学 | A kind of dynamic water coincidence load test instrument of load- |
| CN109932260A (en) * | 2019-03-19 | 2019-06-25 | 北京科技大学 | A kind of the wheel tracking test system and test method of asphalt mixture hydrodynamic pressure environment |
| CN209215082U (en) * | 2018-09-13 | 2019-08-06 | 兰州理工大学 | A kind of simulating vehicle load moves the experimental rig of water scouring effect |
| CN110108587A (en) * | 2019-05-16 | 2019-08-09 | 哈尔滨工业大学 | A kind of multidirectional dynamic water washout test device of asphalt and test method |
-
2021
- 2021-01-14 CN CN202110049453.3A patent/CN112881214B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017121357A1 (en) * | 2016-01-13 | 2017-07-20 | 长沙理工大学 | Asphalt pavement pore water pressure simulation test device and method |
| CN107063884A (en) * | 2016-12-15 | 2017-08-18 | 东南大学 | A kind of lower experimental provision and test method for evaluating porous asphalt pavement high-temperature behavior of multi- scenarios method effect |
| CN106610363A (en) * | 2017-02-27 | 2017-05-03 | 北京科技大学 | Multifunctional asphalt mixture dynamic water scouring test device and test method |
| CN106959253A (en) * | 2017-05-27 | 2017-07-18 | 长安大学 | A kind of asphalt moves water salt corrosion test device and test method |
| CN107748134A (en) * | 2017-11-30 | 2018-03-02 | 北京科技大学 | A kind of asphalt mixture hydrodynamic pressure choice and creation of healthy environment system and test method |
| CN108333051A (en) * | 2018-01-16 | 2018-07-27 | 长安大学 | A kind of dynamic water coincidence load test instrument of load- |
| CN209215082U (en) * | 2018-09-13 | 2019-08-06 | 兰州理工大学 | A kind of simulating vehicle load moves the experimental rig of water scouring effect |
| CN109932260A (en) * | 2019-03-19 | 2019-06-25 | 北京科技大学 | A kind of the wheel tracking test system and test method of asphalt mixture hydrodynamic pressure environment |
| CN110108587A (en) * | 2019-05-16 | 2019-08-09 | 哈尔滨工业大学 | A kind of multidirectional dynamic water washout test device of asphalt and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112881214B (en) | 2022-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106610363B (en) | Multifunctional asphalt mixture running water scouring test device and test method | |
| CN107515150B (en) | Comprehensive test experimental device for mechanical properties of marine pipeline | |
| CN107389479B (en) | Multi-factor coupling test device and method for asphalt mixture | |
| CN109115593B (en) | Marine climate environment-tension, compression and bending load coupling test equipment and test method | |
| CN109163986B (en) | Marine climate environment-torsion load coupling test device and test method | |
| CN108519291B (en) | High-temperature stretching-fatigue mechanical property tester and method based on electric cylinder driving | |
| CN105445168A (en) | Simulation test device and method for pore water pressure of asphalt pavement | |
| CN112881215A (en) | Synchronous high-frequency mechanical loading test method for hydrodynamic pressure environment | |
| CN104990671A (en) | Device for researching sealing performance of flanges in vibration environment | |
| CN112881214B (en) | Synchronous high-frequency mechanical loading test system for hydrodynamic pressure environment | |
| CN114608962B (en) | Uniaxial compression resistance tester | |
| CN112834207B (en) | Valve pressure test diagnostic device | |
| CN112098231A (en) | Large triaxial mechanical test device and test method for simulating freeze-thaw cycle coarse-grained soil | |
| CN205404143U (en) | Hydraulic system components and parts reliability test device containing environment field | |
| CN210347362U (en) | Compensator constant pressure fatigue testing machine | |
| CN115493925B (en) | Bridge suspension cable tension-torsion corrosion fatigue coupling test device and test method | |
| CN213091384U (en) | Large triaxial mechanical test device for simulating freeze-thaw cycle coarse-grained soil | |
| CN113790964A (en) | Stress aging test device and method for high polymer material | |
| CN109029845B (en) | Testing device and testing method for sealing performance of hollow bolt | |
| CN217466137U (en) | Device for verifying sealing performance of oil cylinder piston | |
| CN110658049B (en) | Ice shearing binding force measuring device and method without freezing confining pressure | |
| CN205374244U (en) | Asphalt pavement pore water pressure simulation testing device | |
| CN108760535B (en) | Rock-soil material high-speed shearing test device and test method thereof | |
| CN105424467B (en) | Multi-axis hydrostatic experiment loading unit and method based on twin shaft testing machine | |
| CN220064058U (en) | Concrete underwater repair simulation test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |