CN213779705U - Fixing clamp for testing crack resistance of composite pavement structure - Google Patents
Fixing clamp for testing crack resistance of composite pavement structure Download PDFInfo
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- CN213779705U CN213779705U CN202022082654.7U CN202022082654U CN213779705U CN 213779705 U CN213779705 U CN 213779705U CN 202022082654 U CN202022082654 U CN 202022082654U CN 213779705 U CN213779705 U CN 213779705U
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Abstract
The utility model discloses a mounting fixture for testing composite pavement structure crack resistance performance experiment can fix the test piece to be tested on universal tester accurately, the mounting fixture includes fixed part and connecting portion, threaded connection between fixed part and the connecting portion, the fixed part includes fixed frame, fixed frame is last to be provided with two stand platforms, the height of two stand platforms is adjustable, and two stand platforms keep on the same horizontal plane all the time, the both ends of the test piece to be tested are fixed respectively on two stand platforms; the connecting part is of a rivet structure, a connecting hole is formed in a rivet rod of the rivet structure and used for being connected with a universal testing machine, and a plurality of mounting holes are formed in a rivet cap of the rivet structure and used for fixedly mounting the fixing frame.
Description
Technical Field
The utility model relates to a supplementary experimental apparatus of test composite pavement structure crack resistance ability specifically is a mounting fixture for testing composite pavement structure crack resistance ability experiment.
Background
At present, the main form of the high-grade highway pavement structure in China is the asphalt pavement with a semi-rigid base course, but with the use of a large amount of semi-rigid base course asphalt pavements, the problem of cracks is increasingly prominent, and the structure becomes the main defect of the pavement with the structure. In order to inhibit cracking of an asphalt surface course caused by cracking of a semi-rigid base course, a commonly used treatment method is to use facilities such as geotextile, geogrid, special metal mesh and the like between the base course and the surface course as an anti-reflection crack interlayer after cracks of the semi-rigid base course appear, and meanwhile, along with the development of domestic construction technology, a stress absorbing layer is also increasingly applied between the surface course and the base course and between an old road surface and a new road surface to inhibit the expansion of the cracks.
At present, no special equipment is used for testing the crack resistance of a lower sealing layer of a composite pavement structure, and a rut tester and a universal testing machine (generally adopting a three-point loading mode) are commonly used for testing the crack resistance. However, there are disadvantages to using both of these devices for testing: the anti-crack performance of the wheel is detected by using a rutting tester, the crack expansion condition is difficult to observe, and the axle load and the running speed of the wheel cannot be easily changed; although the universal testing machine can clearly observe the expansion condition of the crack and set different frequency parameters, the to-be-tested piece cannot be well fixed on the universal testing machine, so that the test result is influenced, and the accuracy of the test result cannot be ensured. Therefore, it is very important to design a fixing clamp which has a simple structure and can well fix the to-be-tested piece on the universal testing machine.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned problem that can not be fine will await measuring the test piece fixing in using universal tester to carry out the experiment of anti crack performance test to composite pavement structure provides a mounting fixture, this mounting fixture simple structure, easy operation, and efficient, can extensively be used for in the detection experiment of all kinds of composite pavement structure crack resistance ability.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a mounting fixture for testing composite pavement structure anti-crack performance experiment for to await measuring the test piece and fix on universal tester, mounting fixture includes fixed part and connecting portion, threaded connection between fixed part and the connecting portion, wherein:
the fixed part comprises a fixed frame, two support platforms are fixedly arranged on the fixed frame, the heights of the two support platforms can be adjusted, the two support platforms are always kept on the same horizontal plane, and two ends of the piece to be tested are respectively fixed on the two support platforms;
the connecting part is of a rivet structure, a connecting hole is formed in a rivet rod of the rivet structure and used for being connected with a universal testing machine, and a plurality of mounting holes are formed in a rivet cap of the rivet structure and used for fixedly mounting the fixing frame.
Furthermore, the fixed frame comprises a fixed platform, a front baffle and a rear baffle, a plurality of through holes corresponding to the mounting holes are formed in the center of the lower surface of the fixed platform, and the fixed part is detachably connected to the connecting part through fastening bolts inserted between the through holes and the mounting holes; the front baffle and the rear baffle are respectively vertically arranged on the front side and the rear side of the fixed platform and are fixedly connected to the fixed platform through bolts at the left end and the right end.
Furthermore, every the support platform comprises four support columns fixed on the fixed platform and a support platform arranged on the four support columns, wherein an external thread is arranged on the outer surface of each support column, an adjusting nut is sleeved on the external thread, and an internal thread matched with the external thread is arranged in a hole connected with the support columns on the support platform.
Furthermore, a bulge is arranged in the middle of the top of the supporting platform and corresponds to a depression formed in the bottom of the to-be-tested piece, and the to-be-tested piece is fixed on the support platform by inserting the bulge into the depression.
In addition, one side that supporting platform faced preceding baffle is equipped with and is used for observing whether the level bubble of waiting to test the piece level.
The utility model has the advantages that:
the utility model relates to a mounting fixture for testing anti performance experiment of splitting of composite pavement structure can fix the test piece that awaits measuring on universal tester accurately, combines the strainometer, both can the loading parameter of accurate control experiment, can accurately observe fissured expansion condition simultaneously. This anchor clamps has specifically designed fixed part and connecting portion two parts, connects the test piece that awaits measuring on universal tester after fixed through the arch on two support platforms, can guarantee to await measuring the test piece not hard up in the experiment, has firm in connection's characteristics. And simultaneously, the height-adjustable of two supporting stands is convenient for observe the height of adjusting two supporting stands through the air level, has further guaranteed the accuracy of experimental result, in addition, the utility model discloses a be detachably threaded connection between its fixed part of mounting fixture and the connecting portion, between connecting portion and the universal tester, have the installation and dismantle convenient advantage, it is efficient when using, but wide application in all kinds of composite pavement structure crack resistance's detection experiment.
Drawings
Fig. 1 is a perspective view of the fixing clip of the present invention.
Fig. 2 is a side view of the fixing clamp of the present invention.
Fig. 3 is a schematic structural view of the fixing clamp seat stand of the present invention.
Fig. 4 is an elevation view of the rivet structure of the present invention.
Fig. 5 is a top view of the rivet structure of the present invention.
Shown in the figure:
1-a fixed frame, 11-a fixed platform, 12-a front baffle, 13-a rear baffle, 2-a support platform, 21-a support column, 22-a support platform, 3-a connecting hole, 4-a mounting hole, 5-a bolt, 6-an adjusting nut, 7-a bulge, 8-a level bubble, 9-a piece to be tested, 91-an upper structure of the piece to be tested, 92-a sealing layer part, 93-a lower structure of the piece to be tested, and 94-a prefabricated micro crack.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment provides a mounting fixture for testing anti-crack performance experiment of composite pavement structure, and its structure is shown in fig. 1-2, and including two parts from top to bottom, the upper portion is the fixed part that is used for fixed test piece 9 waiting, and the lower part is the connecting portion that is used for being connected with universal tester, adopt bolted connection between fixed part and the connecting portion, wherein:
the fixed part comprises a fixed frame 1, two support platforms 2 are symmetrically and fixedly arranged on the fixed frame 1, the heights of the two support platforms 2 are adjustable, the two support platforms 2 are always kept on the same horizontal plane, and two ends of the piece to be tested 9 are respectively fixed on the two support platforms 2.
Specifically, the fixing frame 1 includes a fixing platform 11, a front baffle 12 and a rear baffle 13, the center of the lower surface of the fixing platform 11 is provided with a plurality of through holes corresponding to the mounting holes 4, and the fixing part is detachably connected to the connecting part through fastening bolts inserted between the through holes and the mounting holes 4; the front baffle plate 12 and the rear baffle plate 13 are respectively vertically arranged at the front side and the rear side of the fixed platform 11 and are fixedly connected to the fixed platform 11 through bolts 6 at the left end and the right end.
Specifically, as shown in fig. 3, every the support platform 2 is by fixing four support columns 21 on the fixed platform 11 are in with the setting support platform 22 on four support columns 21 constitutes, every the surface of support column 21 is equipped with the external screw thread, adjusting nut 7 is established to the cover on the external screw thread, be equipped with in the hole of being connected with support column 21 on the support platform 22 with external screw thread matched with internal thread, when using, will the top of support column 21 is inserted in support platform 22's the hole, it is right through rotatory adjusting nut 7 the height of support platform 2 is finely tuned, and is in through setting up whether the test piece 9 is waited to observe to test the level of bubble 8 of one side of support platform 22 towards preceding baffle 12.
More specifically, the middle of the top of the supporting platform 22 is provided with a protrusion 8, the to-be-tested piece 9 is divided into an upper structure 91, a sealing structure 92 and a lower structure 93, the bottoms of the two sides of the lower structure 93 are provided with recesses, a micro-crack 94 is prefabricated in the center of the lower structure 93, the protrusion 8 corresponds to the recess formed in the bottom of the lower structure 93, and when the to-be-tested piece is used, the protrusions 8 on the two support stands 2 are simultaneously inserted into the recesses, so that the to-be-tested piece is fixed on the support stands 2 and is adjusted to be horizontal.
Specifically, as shown in fig. 4-5, the connecting portion is of a rivet structure, a connecting hole 3 is formed in a rivet rod of the rivet structure and used for being connected with a universal testing machine, and a plurality of mounting holes 4 are formed in a rivet cap of the rivet structure and used for fixedly mounting the fixing frame 1. Further preferably, the mounting holes 4 are circumferentially arranged.
The fixing jig of this embodiment is provided, before use, with the front barrier 12 removed first, and then the rivet portion of the rivet structure is fixed through the mounting hole 4 and the fixing portion, then the test piece is fixed on a universal testing machine through a connecting hole 3 on a rivet rod of a rivet structure, then two ends of the manufactured test piece 9 to be tested are placed on two support stands 2, the test piece 9 to be tested is fixed on the support stands 2 through a bulge 7, meanwhile, the pressure head of the universal testing machine is adjusted to be close to the piece to be tested 9, the pressure head is right opposite to the prefabricated microcrack 94 of the piece to be tested 9, in the process, the adjusting nut 6 is used for adjusting the to-be-tested piece 9 to a proper height, then the level bubble 8 is observed, whether the test piece is horizontal or not is judged, finally the front baffle 12 is installed again, the strain gauge is attached to the position right above the prefabricated microcrack 94 on the to-be-tested piece 9, the experiment parameters are input, and the experiment is carried out.
The above-mentioned embodiment is fixed the fixed part of anchor clamps on universal machine through the rivet structure, it guarantees to have two parts of measures to the fixed of test piece, at first, fix the fixed frame on universal machine, secondly, be used for fixing the support platform of test piece, the height of support platform can be adjusted through fine setting adjusting nut, adjust suitable height to guarantee the test piece, can accurately fix the test piece that awaits measuring on universal machine, combine the strain gauge, the loading parameter that both can accurate control experiment, simultaneously can the cracked extension condition of accurate observation.
The parts not described in the specification are prior art or common general knowledge. The present embodiment is only used for illustrating the present invention, and is not used to limit the scope of the present invention, and modifications such as equivalent replacement made by those skilled in the art to the present invention are all considered to fall within the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides a mounting fixture for testing anti crack performance experiment of composite pavement structure for will await measuring piece (9) and fix on universal tester, its characterized in that: the mounting fixture includes fixed part and connecting portion, threaded connection between fixed part and the connecting portion, wherein:
the fixed part comprises a fixed frame (1), two support platforms (2) are fixedly arranged on the fixed frame (1), the heights of the two support platforms (2) can be adjusted, the two support platforms (2) are always kept on the same horizontal plane, and two ends of the piece to be tested (9) are respectively fixed on the two support platforms (2);
the connecting part is of a rivet structure, a connecting hole (3) is formed in a rivet rod of the rivet structure and used for being connected with a universal testing machine, and a plurality of mounting holes (4) are formed in a rivet cap of the rivet structure and used for fixedly mounting the fixed frame (1).
2. The fixing clamp for the test of the crack resistance of the composite pavement structure according to claim 1, is characterized in that: the fixing frame (1) comprises a fixing platform (11), a front baffle plate (12) and a rear baffle plate (13), a plurality of through holes corresponding to the mounting holes (4) are formed in the center of the lower surface of the fixing platform (11), and the fixing part is detachably connected to the connecting part through fastening bolts inserted between the through holes and the mounting holes (4); the front baffle (12) and the rear baffle (13) are respectively vertically arranged on the front side and the rear side of the fixed platform (11) and are fixedly connected to the fixed platform (11) through bolts (5) at the left end and the right end.
3. The fixing clamp for the test of the crack resistance of the composite pavement structure according to the claim 2 is characterized in that: every the support platform (2) is by fixing four spinal branch daggers (21) on fixed platform (11) are in with setting up supporting platform (22) on four spinal branch daggers (21) are constituteed, every the surface of supporting column (21) is equipped with the external screw thread, adjusting nut (6) are established to the cover on the external screw thread, supporting platform (22) go up be connected with supporting column (21) in the hole be equipped with external screw thread matched with internal thread.
4. The fixing clamp for the test of the crack resistance of the composite pavement structure according to the claim 3 is characterized in that: the middle of the top of the supporting platform (22) is provided with a bulge (7), the bulge (7) corresponds to a depression formed in the bottom of a to-be-tested piece (9), and the to-be-tested piece (9) is fixed on the support platform (2) by inserting the bulge (7) into the depression.
5. The fixing clamp for the test of the crack resistance of the composite pavement structure according to claim 4 is characterized in that: one side of the supporting platform (22) facing the front baffle (12) is provided with a level bubble (8) for observing whether the piece to be tested (9) is horizontal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022082654.7U CN213779705U (en) | 2020-09-21 | 2020-09-21 | Fixing clamp for testing crack resistance of composite pavement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022082654.7U CN213779705U (en) | 2020-09-21 | 2020-09-21 | Fixing clamp for testing crack resistance of composite pavement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213779705U true CN213779705U (en) | 2021-07-23 |
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ID=76905629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022082654.7U Active CN213779705U (en) | 2020-09-21 | 2020-09-21 | Fixing clamp for testing crack resistance of composite pavement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213779705U (en) |
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2020
- 2020-09-21 CN CN202022082654.7U patent/CN213779705U/en active Active
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