CN203745314U - Multi-angle torsional shear test device used for field interlayer shearing - Google Patents
Multi-angle torsional shear test device used for field interlayer shearing Download PDFInfo
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- CN203745314U CN203745314U CN201420066971.1U CN201420066971U CN203745314U CN 203745314 U CN203745314 U CN 203745314U CN 201420066971 U CN201420066971 U CN 201420066971U CN 203745314 U CN203745314 U CN 203745314U
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- pointer bar
- core cylinder
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- spot
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Abstract
The utility model discloses a multi-angle torsional shear test device used for field interlayer shearing, comprising a drilled core cylinder and a pointer rod, wherein the lower part of the drilled core cylinder is used for holding a drilled road surface core sample; the pointer rod is horizontally placed in a circular groove, two ends of the pointer rod are clamped on the side wall of the drilled core cylinder; a connecting rod is vertically fixed on the pointer rod, and the pointer rod is connected with the road surface core sample by the connecting rod; the center of the circular groove of the top surface of the drilled core cylinder is provided with a cylindrical through hole used for holding the connecting rod and communicated with the lower part of the drilled core cylinder. According to the utility model, in order to realize multi-angle rotary shearing, the top surface of the drilled core cylinder is provided with the groove used for placement of the pointer rod, the pointer rod is connected with the asphalt layer of a test piece and then load is applied to an ejector rod on a welding rod to achieve the purpose of rotating the asphalt layer. The multi-angle torsional shear test device is simple in structure, and simple and convenient to operate, and solves the problem that a sample core needs to be taken back to the room during rotary shear test on the road surface sample core.
Description
Technical field
The utility model belongs to the Performance Detection technical field of highway engineering bituminous pavement, particularly relates to a kind of multi-angle torsion shear apparatus for on-the-spot interlayer shear.
Background technology
Along with the development of road cause, China's road total kilometrage number constantly increases, and quality grade also improves constantly, and Asphalt Pavement Damage more and more comes into one's own.At the large bituminous pavement of some volume of traffic, especially at summer high temperature, more easily produce rut, gather around the diseases such as bag, passing, pavement strength is reduced.The generation of these diseases is not only because the impact of external environment factor also comprises the load force that comes from vehicle.And the direction of this power is not only perpendicular to road surface direction, also comprise the direction that is parallel to road surface direction and becomes various angles with road surface.The shearing action of road surface under tension, pressure and various angles thus.Cause road surface that various destruction easily occurs just because of the existence of these power.Evaluate the acting force of all angles for the impact of Pavement Performance so be necessary to propose a kind of method.
In view of current existing checkout equipment and method are all first to have drilled through core from scene, road surface, and then core is taken indoor, do again indoor rotational shear test, finally evaluate bituminous pavement bonding part anti-shear performance by laboratory test results, and all do not have a kind of equipment can directly do at the scene the rotational shear test of multi-angle always.
Utility model content
The purpose of this utility model is to address the above problem, and provides a kind of multi-angle for on-the-spot interlayer shear to turn round and has cut device, and this apparatus structure is simple, easy and simple to handle, has solved in the time that road pavement sample core does rotational shear test and sample core must have been taken back to indoor problem.
To achieve these goals, the technical scheme that the utility model adopts is: comprise that bottom is for holding brill core cylinder and the pointer bar of the road surface core drilling through; The end face that bores core cylinder offers circular groove, and pointer bar is placed horizontally in circular groove, and the two ends of pointer bar are stuck on the sidewall that bores core cylinder; The upper surface center of pointer bar is vertically fixed with welding bars, and the top of welding bars is fixed with the horizontally disposed push rod for driving pointer bar to rotate at groove; On the lower surface of pointer bar, be also vertically fixed with connecting link, pointer bar is connected with road surface core by connecting link; The center of boring the circular groove of core cylinder end face offers the through hole for holding connecting link and communicating with brill core cylinder bottom.
Described push rod one side is provided with sensor, on the signal output part of sensor, is connected with A/D converter, the output terminal of A/D converter with for deriving the computing machine of the load situation applying.
Described sensor comprises speed pickup and torque sensor.
On described pointer bar, be fixed with two connecting links.
The circular arc that rotate for convenience of pointer bar at the both ends of described pointer bar.
The described length of pointer bar is identical with the diameter of circular groove, and pointer bar is across the top of cylindrical hole.
The bottom surface opening of described brill core cylinder, and on the circumference of opening, be provided with some equally distributed teeth, the crown end of these teeth surrounds the circle for drilling through cylindrical road surface core.
Described welding bars is fixedly connected with pointer bar and push rod by the mode of welding.
Compared with prior art, the utlity model has following beneficial effect:
The utility model is sheared for realizing multi-angle rotary, offers the groove for put pointer bar at the end face that bores core cylinder, links together by the brea bed of pointer bar and test specimen, then reaches brea bed by the push rod load application on welding bars and rotates object.The utility model apparatus structure is simple, easy and simple to handle, has solved in the time that road pavement sample core does rotational shear test and sample core must have been taken back to indoor problem.
Further, the utility model is external speed pickup and torque sensor on push rod, then derives the load situation applying with A/D converter and computing machine.So just can measure the anti-shear performance of bonding part.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present utility model;
Fig. 2 is the cut-open view that the utility model bores core cylinder;
Fig. 3 is the vertical view that the utility model bores core cylinder;
Fig. 4 is the structural representation that bores core cylinder lower surface.
Wherein, 1 for boring core cylinder; 2 is connecting link; 3 is pointer bar; 4 is welding bars; 5 is push rod; 6 is sensor; 7 is A/D converter; 8 is computing machine; 9 is circular groove; 10 is cylindrical hole.
Embodiment
Now by reference to the accompanying drawings the utility model is further described, but the utility model is not limited only to following embodiment.
Referring to Fig. 1, the utility model comprises that bottom is for holding brill core cylinder 1 and the pointer bar 3 of the road surface core drilling through; Bore the bottom surface opening of core cylinder 1, and on the circumference of opening, be provided with some equally distributed teeth 10, the crown end of these teeth 10 surrounds the circle for drilling through cylindrical road surface core.The end face that bores core cylinder 1 offers circular groove 9, and pointer bar 3 is placed horizontally in circular groove 9, and the two ends of pointer bar 3 are stuck on the sidewall that bores core cylinder 1; On the lower surface of pointer bar 3, be also vertically fixed with connecting link 2.The circular arc that rotate for convenience of pointer bar 3 at the both ends of pointer bar 3.The length of pointer bar 3 is identical with the diameter of circular groove 9, and pointer bar 3 is across the top of cylindrical hole.The upper surface center of pointer bar 3 is vertically fixed with welding bars 4, and the top of welding bars 4 is fixed with the horizontally disposed push rod 5 for driving pointer bar 3 to rotate at groove 9; Welding bars 4 is fixedly connected with pointer bar 3 and push rod 5 by the mode of welding.Push rod 5 one sides are provided with sensor 6, and sensor 6 comprises speed pickup and torque sensor.On the signal output part of sensor 6, be connected with A/D converter 7, the output terminal of A/D converter 7 with for deriving the computing machine 8 of the load situation applying.Pointer bar 3 is connected with road surface core by connecting link 2; The center of boring the circular groove 9 of core cylinder 1 end face offers the cylindrical hole 10 for holding connecting link 2 and communicating with brill core cylinder 1 bottom.
The utility model is made up of brill core cylinder 1, connecting link, pointer bar 3, welding bars 4, push rod 5, sensor 6 (comprising speed pickup and torque sensor), A/D converter 7, computing machine 8.
Wherein, boring core cylinder 1 lower surface has tooth, as shown in Figure 4.Like this in order to squeeze into more easily road surface, and tooth is more large closeer time, and the major part of the core drilling through all concentrates in the part that the crown end of tooth surrounds.Boring the part of core cylinder 1 more than ground is center drilling, as shown in Figure 2, the part that in Fig. 2, core exists is under ground portion, and the part above of under ground portion all belongs to aerial part, in Fig. 2, aerial part is offered porose, pointer bar 3 is with regard to frame on hole, and the two ends of pointer bar 3 ride over both sides, hole and bore between the part of core cylinder 1 more than the plane of living in of hole.Relation between them is as Fig. 2 and Fig. 3.By can be clearly seen that in Fig. 2 more than the residing plane in hole, some barrel, in order to facilitate pointer bar 3 to rotate, and pointer bar 3 two ends are circular, its length is exactly to bore the diameter of core cylinder inner tube wall.In sum, pointer bar 3 can only rotate, can not move up and down, and can rotate along the inwall that bores core cylinder 1 fine.
In addition, pointer bar 3 aperture that symmetrical two connecting links are all opened on drilled core cylinder 1 below surrounds, as shown in Figure 3.So just pointer bar and test specimen can be linked together, and in their motion time, can not have influence on and bore core cylinder 1.
In use, synchronously rotate by drive road surface, the right-hand member termination core that turns push rod 5, and the tooth that bores core cylinder bottom can make core space around become large, so power that need not be very large just can make push rod 5 drive pointer bar 3 and test specimen to rotate, the turning round of any angle cut can.And push rod 5 and pointer bar be parallel bar, so the angle that push rod 5 turns over is exactly the angle that test specimen rotates.Then push rod 5 left ends are provided with sensor 6 (speed probe and torque sensor), the tach signal that the push rod collecting 5 is applied and torque signal convert electric signal to and are defeated by A/D converter 7, and A/D converter 7 is converted to digital signal by the pulse electrical signal of input and is transported in computing machine 8 by wire.
Claims (8)
1. for a multi-angle torsion shear apparatus for on-the-spot interlayer shear, it is characterized in that: comprise that bottom is for holding brill core cylinder (1) and the pointer bar (3) of the road surface core drilling through; The end face that bores core cylinder (1) offers circular groove (9), and pointer bar (3) is placed horizontally in circular groove (9), and the two ends of pointer bar (3) are stuck on the sidewall that bores core cylinder (1); The upper surface center of pointer bar (3) is vertically fixed with welding bars (4), and the top of welding bars (4) is fixed with the horizontally disposed push rod (5) for driving pointer bar (3) to rotate at groove (9); On the lower surface of pointer bar (3), be also vertically fixed with connecting link (2), pointer bar (3) is connected with road surface core by connecting link (2); The center of boring the circular groove (9) of core cylinder (1) end face offers the through hole (10) for holding connecting link (2) and communicating with brill core cylinder (1) bottom.
2. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, it is characterized in that: described push rod (5) one sides are provided with sensor (6), on the signal output part of sensor (6), be connected with A/D converter (7), the output terminal of A/D converter (7) with for deriving the computing machine (8) of the load situation applying.
3. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 2, is characterized in that: described sensor (6) comprises speed pickup and torque sensor.
4. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, is characterized in that: on described pointer bar (3), be fixed with two connecting links.
5. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, is characterized in that: the circular arc that rotate for convenience of pointer bar (3) at the both ends of described pointer bar (3).
6. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, is characterized in that: the length of described pointer bar (3) is identical with the diameter of circular groove (9), and pointer bar (3) is across the top of cylindrical hole.
7. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, it is characterized in that: the bottom surface opening of described brill core cylinder (1), and on the circumference of opening, be provided with some equally distributed teeth (10), the crown end of these teeth (10) surrounds the circle for drilling through cylindrical road surface core.
8. the multi-angle torsion shear apparatus for on-the-spot interlayer shear according to claim 1, is characterized in that: described welding bars (4) is fixedly connected with pointer bar (3) and push rod (5) by the mode of welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066971.1U CN203745314U (en) | 2014-02-14 | 2014-02-14 | Multi-angle torsional shear test device used for field interlayer shearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066971.1U CN203745314U (en) | 2014-02-14 | 2014-02-14 | Multi-angle torsional shear test device used for field interlayer shearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745314U true CN203745314U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420066971.1U Expired - Fee Related CN203745314U (en) | 2014-02-14 | 2014-02-14 | Multi-angle torsional shear test device used for field interlayer shearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745314U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005229A1 (en) | 2015-07-09 | 2017-01-12 | Czech Technical University In Prague, Faculty Of Civil Engineering, Department Of Road Structures | Device for measuring shear properties of asphalt mixtures |
| CN108279155A (en) * | 2018-01-29 | 2018-07-13 | 东北大学 | A kind of multidirectional loading structure surface intensity measurement device and application method |
-
2014
- 2014-02-14 CN CN201420066971.1U patent/CN203745314U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005229A1 (en) | 2015-07-09 | 2017-01-12 | Czech Technical University In Prague, Faculty Of Civil Engineering, Department Of Road Structures | Device for measuring shear properties of asphalt mixtures |
| CN108279155A (en) * | 2018-01-29 | 2018-07-13 | 东北大学 | A kind of multidirectional loading structure surface intensity measurement device and application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |