CN109060381B - Rut testing device and rut testing method for single-point type large-scale pavement acceleration loading system - Google Patents
Rut testing device and rut testing method for single-point type large-scale pavement acceleration loading system Download PDFInfo
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- CN109060381B CN109060381B CN201810988925.XA CN201810988925A CN109060381B CN 109060381 B CN109060381 B CN 109060381B CN 201810988925 A CN201810988925 A CN 201810988925A CN 109060381 B CN109060381 B CN 109060381B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/013—Wheels
Abstract
The invention discloses a track testing device and a track testing method for a single-point large-scale road surface acceleration loading system, which belong to road surface test equipment, and the invention aims to solve the technical problem of combining the advantages of two acceleration loading devices, so that the acceleration loading can be realized in a real sense, and a roadbed and road surface performance model required by the field of road engineering research can be obtained, and adopts the following technical scheme: the structure of the device comprises an actuator, standard wheels and double-sided racks, wherein the double-sided racks are vertically arranged, the actuator is arranged above the double-sided racks, a transmission device is arranged on the double-sided racks, the standard wheels are arranged on the transmission device, and the transmission device is used for realizing the relative and opposite movement of the standard wheels on two sides. The invention also discloses a rut test method for the single-point large-scale pavement acceleration loading system.
Description
Technical Field
The invention relates to pavement test equipment, in particular to a track test device and a track test method for a single-point large-scale pavement acceleration loading system.
Background
The road surface accelerated loading test is an international advanced roadbed and road surface test verification research means. Among the existing acceleration loading devices in China, most of the acceleration loading devices are acceleration loading devices for simulating standard wheel loads, and the acceleration loading devices have the advantages of being capable of truly simulating the effect of vehicle loads on a road surface structure, and have the disadvantages of being low in loading speed, complex in mechanical mode and mainly based on experience in performance models. Therefore, the single-point type large-scale pavement acceleration loading system test system overcomes the defects, realizes high loading speed and simple mechanical mode, is easy to realize long-term performance verification of different pavement structures, and forms a pavement structure performance model closely related to mechanical indexes. However, the existing single-point type large-scale pavement acceleration loading system test system applies repeated pulse load to the road surface by adopting a round load plate, so that the process of generating ruts by rolling the road surface by standard wheels cannot be simulated, and the loading time required by the ruts generated by the pavement is far less than the loading test required by pavement structural performance verification, so that the advantages of combining two acceleration loading devices can be realized, the actual acceleration loading can be realized, and the roadbed pavement performance model required by the field of road engineering research can be obtained, and is the technical problem which needs to be solved in the prior art.
Disclosure of Invention
The invention aims to provide a track testing device and a track testing method for a single-point large-scale road surface acceleration loading system, which are used for solving the problem of how to combine the advantages of two acceleration loading devices, so that the acceleration loading in the true sense can be realized, and the roadbed and road surface performance model required by the field of road engineering research can be obtained.
The technical task of the invention is realized in the following way that the rut testing device for the single-point large-scale road surface acceleration loading system comprises an actuator, standard wheels and double-sided racks, wherein the double-sided racks are vertically arranged, the actuator is arranged above the double-sided racks, a transmission device is arranged on the double-sided racks, the standard wheels are arranged on the transmission device, and the transmission device is used for realizing synchronous relative and opposite movement of the standard wheels at two sides.
Preferably, the transmission device comprises a first wheel moving device and a second wheel moving device, and the first wheel moving device and the second wheel moving device are respectively arranged at two sides of the double-sided rack;
the wheel moving device I comprises a double-gear I and a single-sided rack, the double-gear I comprises a large gear I and a small gear I, the large gear I is meshed with one side of the double-sided rack, and the small gear I is meshed with the single-sided rack; the lower side of the single-sided rack is provided with a wheel bracket, a standard wheel is arranged on the wheel bracket through a wheel shaft, a return spring is arranged on the wheel shaft, the return spring adopts a torsion spring, and the torsion spring is sleeved on the wheel shaft.
More preferably, the second wheel moving device comprises a second double gear and a single-sided rack, the second double gear comprises a second large gear and a second small gear, and the second small gear and the first small gear are arranged in a staggered manner; the second large gear is meshed with one side of the double-sided rack, and the second small gear is meshed with the single-sided rack; the lower side of the single-sided rack is provided with a wheel bracket, a standard wheel is arranged on the wheel bracket through a wheel shaft, a return spring is arranged on the wheel shaft, the return spring adopts a torsion spring, and the torsion spring is sleeved on the wheel shaft.
Preferably, the stroke to standard wheel stroke ratio of the actuator is 1:10.
preferably, the standard wheels adopt single-axle double-wheel sets of the truck.
More preferably, the wheel bracket is in an inverted U shape, the inverted U-shaped wheel bracket comprises a transverse strut I, a vertical strut I and a vertical strut II which are arranged at two ends of the transverse strut I, a wheel shaft is arranged between the vertical strut I and the vertical strut II, and the wheel shaft is respectively connected with the vertical strut I and the vertical strut II in a rotating way; the two standard wheels are arranged on the wheel axle at intervals.
Preferably, the standard wheels adopt double-axle double-wheel sets of the truck.
More preferably, the wheel bracket is in an inverted-Chinese-character-shan shape, and comprises a cross brace II, a vertical brace III and a vertical brace IV which are arranged at two ends of the cross brace II, a vertical brace V is arranged between the vertical brace III and the vertical brace IV, and the vertical brace V is arranged on the cross brace II and is positioned in the middle of the cross brace II; the two wheel axles are respectively arranged between the third vertical support and the fifth vertical support and between the fourth vertical support and the fifth vertical support, and are respectively in rotary connection with the third vertical support, the fourth vertical support and the fifth vertical support; the two standard wheels are respectively arranged on the two wheel axles.
The method is characterized in that the single-point type large-scale road surface acceleration loading system is used as a load control unit, and the motion of an actuator perpendicular to the road surface direction in the loading process is converted into the reverse rolling of two groups of standard wheels on a road surface through a double-sided rack and a transmission device; and in the unloading process, the two groups of standard wheels are automatically reset in opposite directions by adopting a reset spring, so that the two groups of standard wheels are rolled back and forth on the road surface, and the vertical deformation of the road surface, namely the track depth of the road surface, corresponding to the number of times of rolling back and forth is automatically acquired by a deformation test system, wherein the deformation test system adopts a deformation test system commonly used for detecting the track of the road surface in the prior art.
Preferably, the accuracy of the sensor in the deformation test system is 0.001mm; the standard wheels adopt a single-axle double-wheel set or a double-axle double-wheel set of the truck.
Compared with the prior art, the rut testing device and method for the single-point large-scale pavement acceleration loading system have the following advantages:
(1) The invention solves the technical problems that the traditional single-point type large-scale road surface acceleration loading system can only quickly simulate structural damage of the road surface under the action of vertical load, but cannot simulate track depth change of the road surface under the action of reciprocating rolling of standard wheels, realizes the aim that the single-point type large-scale road surface acceleration loading system can simulate structural damage of the road surface under the action of vertical load and simulate track depth change of the road surface under the action of reciprocating rolling of standard wheels, further digs the potential of the traditional acceleration loading system, and has good popularization and application values;
(2) The invention combines the advantages that the acceleration loading device for simulating the standard wheel load can truly simulate the action of the vehicle load on the road surface structure and the advantages that the single-point large-scale road surface acceleration loading system has high loading speed and simple mechanical mode, and is easy to realize long-term performance verification of different road surface structures, and the change condition of the road surface rut under the reciprocating rolling action of the standard wheel can be simulated in the road surface rut simulation process, thereby greatly shortening the research period and saving a large amount of scientific research expenses;
(3) The invention adopts the double-sided rack and the wheel moving device to convert the vertical motion of the actuator into the reverse rolling of the standard wheel on the road surface;
(4) The invention installs the return spring on the wheel axle, and can automatically reset the standard wheels in opposite directions in the unloading process of the actuator.
Therefore, the invention has the characteristics of reasonable design, simple structure, easy processing, small volume, convenient use, multiple purposes, and the like, thereby having good popularization and use values.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a single-point large-scale road surface acceleration loading system rut testing device;
FIG. 2 is a schematic diagram of the structure of the first double gear in FIG. 1;
FIG. 3 is a schematic diagram of a second double gear in FIG. 1;
FIG. 4 is a schematic structural view of embodiment 2;
fig. 5 is a schematic structural view of embodiment 3;
fig. 6 is a graph of rut depth versus number of passes.
In the figure: 1. the device comprises an actuator, 2, a double-sided rack, 3, a double-gear I, 3-1, a large gear I, 3-2, a small gear I, 4, a single-sided rack, 5, a standard wheel, 6, a wheel bracket, 7, a wheel axle, 8, a return spring, 9, a cross brace I, 10, a vertical brace I, 11, a vertical brace II, 12, a cross brace II, 13, a vertical brace III, 14, a vertical brace IV, 15, a vertical brace V, 16, a double-gear II, 16-1, a large gear II, 16-2 and a small gear II.
Detailed Description
The rut testing device and method for the single-point large-scale road surface acceleration loading system of the present invention will be described in detail below with reference to the accompanying drawings and specific examples.
Example 1:
as shown in figures 1 and 2, the rut testing device for the single-point large-scale road surface acceleration loading system structurally comprises an actuator 1, standard wheels 5 and double-sided racks 2, wherein the double-sided racks 2 are vertically arranged, the actuator 1 is arranged above the double-sided racks 2, a transmission device is arranged on the double-sided racks 2, the standard wheels 5 are arranged on the transmission device, and the transmission device is used for realizing synchronous relative and opposite movement of the standard wheels 5 at two sides. The transmission device comprises a first wheel moving device and a second wheel moving device, and the first wheel moving device and the second wheel moving device are respectively arranged at two sides of the double-sided rack 2; the wheel moving device I comprises a double gear I3 and a single-sided rack 4, wherein the double gear I3 comprises a large gear I3-1 and a small gear I3-2, the large gear I3-1 is meshed with one side tooth of the double-sided rack 2, and the small gear I3-2 is meshed with the single-sided rack 4; the lower side of the single-sided rack 4 is provided with a wheel bracket 6, and the standard wheel 5 is arranged on the wheel bracket 6 through a wheel shaft 7. The wheel moving device II comprises a double gear II 16 and a single-sided rack 4, wherein the double gear II 16 comprises a large gear II 16-1 and a small gear II 16-2, and the small gear II 16-2 and the small gear I3-2 are arranged in a staggered manner; the second large gear 16-1 is meshed with one side of the double-sided rack 2, and the second small gear 16-2 is meshed with the single-sided rack 4; the lower side surface of the single-sided rack 4 is provided with a wheel bracket 6, a standard wheel 5 is arranged on the wheel bracket 6 through a wheel shaft 7, a return spring 8 is arranged on the wheel shaft 7, the return spring 8 adopts a torsion spring, and the torsion spring is sleeved on the wheel shaft 7. The stroke to standard wheel stroke ratio of the actuator 1 is 1:10.
example 2:
the standard wheel 5 in example 1 employs a single axle twin wheel set for a cargo vehicle. As shown in fig. 3, the wheel bracket 6 is in an inverted U shape, the inverted U-shaped wheel bracket 6 comprises a transverse strut I9, a vertical strut I10 and a vertical strut II 11 which are arranged at two ends of the transverse strut I9, a wheel shaft 7 is arranged between the vertical strut I10 and the vertical strut II 11, and the wheel shaft 7 is respectively connected with the vertical strut I10 and the vertical strut II 11 in a rotating way; two standard wheels 5 are mounted on the wheel axle 7 at intervals. The wheel bracket 6 is of an integrated structure, the wheel shaft 7 is rotatably arranged on the wheel bracket 6, and the standard wheel 5 is rotatably arranged on the wheel shaft 7.
Example 3:
the difference between this embodiment and embodiment 2 is only that the standard wheel 5 of embodiment 1 is a dual axle dual wheel set of a truck. As shown in fig. 4, the wheel bracket 6 is in an inverted-Chinese-character-shan shape, the inverted-Chinese-shan-shaped wheel bracket 6 comprises a transverse brace two 12, a vertical brace three 13 and a vertical brace four 14 which are arranged at two ends of the transverse brace two 12, a vertical brace five 15 is arranged between the vertical brace three 13 and the vertical brace four 14, and the vertical brace five 15 is arranged on the transverse brace two 12 and positioned in the middle of the transverse brace two 12; the two wheel axles 7 are arranged, the two wheel axles 7 are respectively arranged between the third vertical support 13 and the fifth vertical support 15 and between the fourth vertical support 14 and the fifth vertical support 15, and the wheel axles 7 are respectively in rotary connection with the third vertical support 13, the fourth vertical support 14 and the fifth vertical support 15; the two standard wheels 5 are respectively mounted on two wheel axles 7. The wheel bracket 6 is of an integrated structure, two wheel shafts 7 are respectively and rotatably arranged on the wheel bracket 6, and two standard wheels 5 are respectively and rotatably arranged on the two wheel shafts 7.
Example 4:
the invention relates to a rut test method for a single-point large-scale road surface acceleration loading system, which takes the single-point large-scale road surface acceleration loading system as a load control unit, and converts the motion of an actuator 1 perpendicular to the road surface direction in the loading process into the reverse rolling of two groups of standard wheels 5 on a road surface through a double-sided rack 2 and a transmission device; and in the unloading process, the two groups of standard wheels 5 are automatically reset in opposite directions by adopting a reset spring 8, so that the two groups of standard wheels 5 are rolled back and forth on the road surface, and the road surface vertical deformation corresponding to the reciprocating rolling times, namely the road surface rut depth, is automatically acquired by a deformation testing system. Wherein, the stroke of actuator 1 is 1 with standard wheel 5 stroke ratio: 10. the accuracy of the sensor in the deformation test system is 0.001mm; the standard wheels 5 adopt a single-axle double-wheel set or a double-axle double-wheel set of the cargo vehicle.
Example 5:
the rut test of the single-point large-scale pavement acceleration loading test research of the pavement structure of the heavy-load traffic highway is carried out in the highway maintenance key laboratory of a certain traffic transport department in Shandong province, and the test process is as follows:
(a) Rolling wheels: the double-sided rack 2 and the transmission device convert the motion of the actuator 1 perpendicular to the road surface direction in the loading process into the reverse rolling of the two standard wheels 5 on the road surface by taking the actuator 1 as the central shaft;
(b) Wheel reset: the torsion spring is arranged on the wheel shaft 7, and automatically resets the two standard wheels 5 in opposite directions in the unloading process of the actuator 1;
(c) Pavement rut measurement: in the process of reciprocating rolling of the two standard wheels 5 formed in the process of loading and unloading the actuator 1, the deformation test system automatically collects the vertical deformation of the road surface after each rolling, namely the track depth of the road surface, as shown in fig. 5;
(d) Load value and frequency control: the load and frequency of the standard wheel 5 perpendicular to the road surface is controlled by the actuator 1 of the loading system.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; the present invention will be described in detail with reference to the foregoing embodiments as soon as possible, and it will be understood by those skilled in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (2)
1. The rut testing device for the single-point type large-scale road surface acceleration loading system is characterized by comprising an actuator, standard wheels and double-sided racks, wherein the double-sided racks are vertically arranged, the actuator is arranged above the double-sided racks, a transmission device is arranged on the double-sided racks, the standard wheels are arranged on the transmission device, and the transmission device is used for realizing the relative and opposite movement of the standard wheels on two sides;
the transmission device comprises a first wheel moving device and a second wheel moving device, and the first wheel moving device and the second wheel moving device are respectively arranged on two sides of the double-sided rack;
the wheel moving device I comprises a double-gear I and a single-sided rack, the double-gear I comprises a large gear I and a small gear I, the large gear I is meshed with one side of the double-sided rack, and the small gear I is meshed with the single-sided rack; the lower side surface of the single-sided rack is provided with a wheel bracket, a standard wheel is arranged on the wheel bracket through a wheel shaft, and a reset spring is arranged on the wheel shaft;
the second wheel moving device comprises a second double gear and a single-sided rack, the second double gear comprises a second large gear and a second small gear, and the second small gear and the first small gear are arranged in a staggered manner; the second large gear is meshed with one side of the double-sided rack, and the second small gear is meshed with the single-sided rack; the lower side surface of the single-sided rack is provided with a wheel bracket, a standard wheel is arranged on the wheel bracket through a wheel shaft, and a reset spring is arranged on the wheel shaft;
the return spring adopts a torsion spring, the torsion spring is arranged on the wheel axle, and the two standard wheels are automatically reset in opposite directions in the unloading process of the actuator;
the stroke of the actuator and the stroke ratio of the standard wheel are 1:10;
the standard wheels adopt single-axle double-wheel sets of the truck; the wheel support is in an inverted U shape, the inverted U-shaped wheel support comprises a transverse strut I and a vertical strut II which are arranged at two ends of the transverse strut I, a wheel shaft is arranged between the vertical strut I and the vertical strut II, and the wheel shaft is respectively connected with the vertical strut I and the vertical strut II in a rotating way; the two standard wheels are arranged on the wheel axle at intervals;
or alternatively, the first and second heat exchangers may be,
the standard wheels adopt double-shaft double-wheel sets of a truck; the wheel bracket is in an inverted-Chinese-character-shan shape and comprises a transverse brace II, a vertical brace III and a vertical brace IV which are arranged at two ends of the transverse brace II, a vertical brace V is arranged between the vertical brace III and the vertical brace IV, and the vertical brace V is arranged on the transverse brace II and is positioned in the middle of the transverse brace II; the two wheel axles are respectively arranged between the third vertical support and the fifth vertical support and between the fourth vertical support and the fifth vertical support, and are respectively in rotary connection with the third vertical support, the fourth vertical support and the fifth vertical support; the two standard wheels are respectively arranged on the two wheel axles.
2. The rut testing method of the rut testing device for the single-point large-scale pavement acceleration loading system is characterized in that the single-point large-scale pavement acceleration loading system is used as a load control unit, and motion of an actuator perpendicular to the pavement direction in the loading process is converted into reverse rolling of two groups of standard wheels on a pavement surface through a double-sided rack and a transmission device; in the unloading process, two groups of standard wheels are automatically reset in opposite directions by adopting a reset spring, so that the two groups of standard wheels are rolled back and forth on a road surface, and the vertical deformation of the road surface, namely the track depth of the road surface, of corresponding times of rolling back and forth is automatically acquired by a deformation testing system;
the accuracy of the sensor in the deformation test system is 0.001mm; the standard wheels adopt a single-axle double-wheel set or a double-axle double-wheel set of the truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988925.XA CN109060381B (en) | 2018-08-28 | 2018-08-28 | Rut testing device and rut testing method for single-point type large-scale pavement acceleration loading system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810988925.XA CN109060381B (en) | 2018-08-28 | 2018-08-28 | Rut testing device and rut testing method for single-point type large-scale pavement acceleration loading system |
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| CN109060381B true CN109060381B (en) | 2024-04-02 |
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