CN105445121A - Field detection equipment for shear resistance strength of asphalt mixture - Google Patents
Field detection equipment for shear resistance strength of asphalt mixture Download PDFInfo
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- CN105445121A CN105445121A CN201510005134.7A CN201510005134A CN105445121A CN 105445121 A CN105445121 A CN 105445121A CN 201510005134 A CN201510005134 A CN 201510005134A CN 105445121 A CN105445121 A CN 105445121A
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Abstract
The invention discloses field detection equipment for shear resistance strength of an asphalt mixture. The field detection equipment comprises a counter force frame, a pressure device, a pressure sensor, a displacement sensor, a pressing head, a standard plane platform and a data acquisition device, wherein the pressure device is connected with the counter force frame; the pressure sensor is simultaneously connected with the pressure device and the pressing head; the displacement sensor is fixed on the pressing head and is in contact with the standard plane platform; and the data acquisition device is used for acquiring a pressure signal of the pressure sensor and a displacement signal of the displacement sensor. The field detection equipment for the shear resistance strength of the asphalt mixture, provided by the invention, can realize field on-site and real-time measurement; a rod surface is sheared and damaged on site and a stressed state is a confined stressed state and is completely the same as the state that the road surface is sheared and stressed at a high temperature, so that the stressed state of the road surface can be really and accurately reflected, a measured result has a relatively high value and the measurement accuracy is improved.
Description
Technical field
The present invention relates to road surface field of measuring technique, particularly a kind of asphalt shear strength field detecting device.
Background technology
Along with the quick growth of national economy, rapidly, up to now, the highway total kilometrage be open to the traffic exceedes 20000km, and wherein major part is bituminous pavement in the high-grade highway construction development of China.But along with highway mileage grows with each passing day, due to the surge of the volume of traffic and vehicular load, the raising of overloaded vehicle and average speed, having there is new trend in the destruction of bituminous pavement, causes huge economic loss to country and society.
Asphalt is a kind of typical viscous-elastic material, and its intensity and stiffness modulus reduce along with the rising of temperature.The rut that bituminous pavement occurs, passing, gather around the diseases such as bag, is at temperature and traffic loading acting in conjunction, caused by the anti-shear ability deficiency of asphalt.In the traffic of China's highway, multiaxis, solid axle carry, high wheel load feature is obvious, and ubiquity overloading, causes un-uniformly distributed will produce larger shear stress in concrete surface thus.Before this, the anti-shearing index of material do not considered in the design process by asphalt, and this may be that the basic reason that large area is damaged appears in road surface.
At present, shear resistance for asphaltic road-mix surface course is measured, general employing uniaxial penetration Experimental Method in Laboratory, namely a sample is obtained, then measured by pressure head pressurization, but during sample pressurized in this metering system, under being in the condition without sidewise restraint, different from road surface actual loading process, measure inaccurate.
Therefore, how providing a kind of asphalt shear strength field detecting device, to improve measurement accuracy, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of asphalt shear strength field detecting device, to improve measurement accuracy.
For solving the problems of the technologies described above, the invention provides following scheme:
A kind of asphalt shear strength field detecting device, comprise reaction frame, pressure apparatus, pressure transducer, displacement transducer, pressure head, reference plane platform and data collector, wherein, described pressure apparatus is connected with described reaction frame, described pressure transducer is connected with described pressure apparatus and described pressure head simultaneously, institute's displacement sensors to be fixed on described pressure head and to contact with described reference plane platform, and described data collector collects the pressure signal of described pressure transducer and the displacement signal of institute's displacement sensors.
Preferably, above-mentioned pressure apparatus is hydraulic means, and described pressure apparatus comprises hydraulic cylinder, and described hydraulic cylinder is vertically set on the bottom surface of described reaction frame.
Preferably, above-mentioned pressure apparatus is Non-follow control.
Preferably, upper displacement sensors is fixed on described pressure head by clamping device.
Preferably, above-mentioned pressure head is of a size of Φ 42mm × 50mm or Φ 28.5mm × 50mm.
Preferably, the material of above-mentioned pressure head is Q235 stainless steel.
Preferably, the Rockwell's hardness of above-mentioned pressure head is 10 ~ 30.
Preferably, the lower surface of above-mentioned pressure head is smooth, and its upper surface is connected with described pressure transducer by screw thread.
Preferably, said reference planar table contacts with road surface and fixes, and described pressure head passes from the center of described reference plane platform.
The asphalt shear strength field detecting device that the invention described above provides, comprise reaction frame, pressure apparatus, pressure transducer, displacement transducer, pressure head, reference plane platform and data collector, wherein, described pressure apparatus is connected with described reaction frame, described pressure transducer is connected with described pressure apparatus and described pressure head simultaneously, institute's displacement sensors to be fixed on described pressure head and to contact with described reference plane platform, and described data collector collects the pressure signal of described pressure transducer and the displacement signal of institute's displacement sensors.During use, by asphalt shear strength field detecting device provided by the present invention is fixed on in-site measurement car, load is provided by in-site measurement car, then pressure is provided by reaction frame and pressure apparatus, adjustment ram position, pressure head and measurement point are aligned, then pressure is applied by pressure transducer to pressure head, pressure head press-in road surface also produces displacement, displacement transducer with reference field platform for benchmark carries out displacement measurement, simultaneously the displacement signal of the data collector pressure signal and institute's displacement sensors of collecting described pressure transducer is gone forward side by side row relax, draw pressure-deformation figure, when stress value reduces to 90 percent of maximum stress point, measure and stop, get and destroy the shear strength of extreme point intensity as asphaltic road-mix surface course.Asphalt shear strength field detecting device provided by the present invention can realize scene and measure in real time on the spot, road pavement shear failure at the scene, stress limits stress for there being side, at high temperature to shear stressed state completely the same with road surface, therefore, it is possible to react the stress on road surface more truly, accurately, measurement result is worth higher, improves measurement accuracy.
Accompanying drawing explanation
The structural representation of the asphalt shear strength field detecting device that Fig. 1 provides for the embodiment of the present invention.
In upper Fig. 1:
Reaction frame 1, pressure apparatus 2, pressure transducer 3, displacement transducer 4, pressure head 5, reference field platform 6, transacter 7.
Embodiment
In order to make those skilled in the art understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, the structural representation of the asphalt shear strength field detecting device that Fig. 1 provides for the embodiment of the present invention.
The asphalt shear strength field detecting device that the embodiment of the present invention provides, comprise reaction frame 1, pressure apparatus 2, pressure transducer 3, displacement transducer 4, pressure head 5, reference plane platform 6 and data collector 7, wherein, pressure apparatus 2 is connected with reaction frame 1, pressure transducer 2 is connected with pressure apparatus 2 and pressure head 5 simultaneously, displacement transducer 4 to be fixed on pressure head 5 and to contact with reference plane platform 6, and data collector 7 collects the pressure signal of pressure transducer 3 and the displacement signal of displacement transducer 4.During use, be fixed on in-site measurement car by the asphalt shear strength field detecting device that the embodiment of the present invention is provided, load is provided by in-site measurement car, then pressure is provided by reaction frame 1 and pressure apparatus 2, adjustment pressure head 5 position, pressure head 5 and measurement point are aligned, then pressure is applied by pressure transducer 3 to pressure head 5, pressure head 5 is pressed into road surface and produces displacement, displacement transducer 4 with reference field platform 6 for benchmark carries out displacement measurement, simultaneously the displacement signal of data collector 7 pressure signal and displacement transducer 4 of collecting pressure transducer 3 is gone forward side by side row relax, draw pressure-deformation figure, when stress value reduces to 90 percent of maximum stress point, measure and stop, get and destroy the shear strength of extreme point intensity as asphaltic road-mix surface course.The asphalt shear strength field detecting device that the embodiment of the present invention provides can realize scene and measure in real time on the spot, road pavement shear failure at the scene, stress limits stress for there being side, at high temperature to shear stressed state completely the same with road surface, therefore, it is possible to react the stress on road surface more truly, accurately, improve measurement accuracy.
Concrete, in use, equipment is placed in Surface of Trial Pavement, and adjusts pressure head 5 position, make pressure head 5 and measurement point centering.Coarse adjustment reaction frame 1 position, makes itself and in-site measurement car rear bumper distance be about 1mm, and then finely tune reaction frame 1 position, make itself and in-site measurement car bumper contact, until contact reading is close to 0.05KN, contact may not exceed 0.05KN.Starting pressure device 2 loads, record pressure and displacement, and when stress value reduces to 90 percent of maximum stress point, test stops.Get and destroy the shear strength of extreme point intensity as compound.
The asphalt shear strength field detecting device that the embodiment of the present invention provides can support the use with large-scale inspection vehicle, detect road surface shear strength at the scene, test condition is consistent with the real conditions on road surface, the performance that can reflect road surface the most truly of test findings, and easy to carry, the accessory such as temperature control box, counterweight that need not be extra can be tested, certainly, also can add counterweight with the use of, counterweight can be provided by in-site measurement car.
In order to optimize such scheme further, pressure apparatus 2 is hydraulic means, and pressure apparatus 2 comprises hydraulic cylinder, and hydraulic cylinder is vertically set on the bottom surface of reaction frame 1.Compact conformation, and better can apply pressure, and the trial load of 6t-10t can be provided at the scene, during the table temperature 40 DEG C-60 DEG C of road, pressure head 5 can injection road surface 2cm-3cm, with indoor uniaxial penetration test of the prior art, the loading speed 1mm/min of load, requires that loading speed is identical, can form effective contrast.
In order to optimize such scheme further, pressure apparatus 2 is Non-follow control, and do not have control lag, control accuracy is high, and it is convenient to control.
In order to optimize such scheme further, displacement transducer 4 is fixed on pressure head 5 by clamping device.Be convenient for changing, and, can according to the position of actual conditions adjusted position displacement sensor 4.
In order to optimize such scheme further, pressure head 5 is of a size of Φ 42mm × 50mm or Φ 28.5mm × 50mm, and meanwhile, the material of pressure head 5 can adopt Q235 stainless steel, and its Rockwell's hardness can be 10 ~ 30, and measurement effect is better.
In order to optimize such scheme further, the lower surface of pressure head 5 is smooth, and its upper surface is connected with pressure transducer 3 by screw thread, and facilitate the replacing of pressure head 5, measurement effect is better.
In order to optimize such scheme further, reference plane platform 6 contacts with road surface and fixes, and pressure head 5 passes from the center of reference plane platform 6, improves measuring accuracy.
Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (9)
1. an asphalt shear strength field detecting device, it is characterized in that, comprise reaction frame, pressure apparatus, pressure transducer, displacement transducer, pressure head, reference plane platform and data collector, wherein, described pressure apparatus is connected with described reaction frame, described pressure transducer is connected with described pressure apparatus and described pressure head simultaneously, institute's displacement sensors to be fixed on described pressure head and to contact with described reference plane platform, and described data collector collects the pressure signal of described pressure transducer and the displacement signal of institute's displacement sensors.
2. asphalt shear strength field detecting device according to claim 1, is characterized in that, described pressure apparatus is hydraulic means, and described pressure apparatus comprises hydraulic cylinder, and described hydraulic cylinder is vertically set on the bottom surface of described reaction frame.
3. asphalt shear strength field detecting device according to claim 2, is characterized in that, described pressure apparatus is Non-follow control.
4. asphalt shear strength field detecting device according to claim 1, is characterized in that, institute's displacement sensors is fixed on described pressure head by clamping device.
5. asphalt shear strength field detecting device according to claim 1, is characterized in that, described pressure head is of a size of Φ 42mm × 50mm or Φ 28.5mm × 50mm.
6. asphalt shear strength field detecting device according to claim 1, is characterized in that, the material of described pressure head is Q235 stainless steel.
7. asphalt shear strength field detecting device according to claim 1, is characterized in that, the Rockwell's hardness of described pressure head is 10 ~ 30.
8. asphalt shear strength field detecting device according to claim 1, it is characterized in that, the lower surface of described pressure head is smooth, and its upper surface is connected with described pressure transducer by screw thread.
9. asphalt shear strength field detecting device according to claim 1, is characterized in that, described reference plane platform contacts with road surface and fixes, and described pressure head passes from the center of described reference plane platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510005134.7A CN105445121A (en) | 2015-01-06 | 2015-01-06 | Field detection equipment for shear resistance strength of asphalt mixture |
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| CN201510005134.7A CN105445121A (en) | 2015-01-06 | 2015-01-06 | Field detection equipment for shear resistance strength of asphalt mixture |
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| CN105445121A true CN105445121A (en) | 2016-03-30 |
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| CN201510005134.7A Pending CN105445121A (en) | 2015-01-06 | 2015-01-06 | Field detection equipment for shear resistance strength of asphalt mixture |
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Cited By (5)
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| CN106894316A (en) * | 2017-02-28 | 2017-06-27 | 武汉理工大学 | A kind of method based on fiber-optic grating sensor detection asphalt pavement structure destruction |
| CN107290220A (en) * | 2017-08-01 | 2017-10-24 | 山东省建筑科学研究院 | A kind of portable steel strength detection impression instrument and its method of testing |
| CN107870220A (en) * | 2017-09-21 | 2018-04-03 | 杭州东方雨虹建筑材料有限公司 | The test device and method of testing of asphalt adhesive spill-out |
| CN109085069A (en) * | 2018-07-19 | 2018-12-25 | 中铁隧道股份有限公司 | Tunnel surrounding structural face shear strength test data acquisition device and test method |
| CN114971364A (en) * | 2022-06-14 | 2022-08-30 | 苏交科集团股份有限公司 | Risk assessment method and system for container stacking place |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106894316A (en) * | 2017-02-28 | 2017-06-27 | 武汉理工大学 | A kind of method based on fiber-optic grating sensor detection asphalt pavement structure destruction |
| CN107290220A (en) * | 2017-08-01 | 2017-10-24 | 山东省建筑科学研究院 | A kind of portable steel strength detection impression instrument and its method of testing |
| CN107290220B (en) * | 2017-08-01 | 2024-03-15 | 山东建研检测检验科技有限公司 | Portable steel strength detection imprint instrument and test method thereof |
| CN107870220A (en) * | 2017-09-21 | 2018-04-03 | 杭州东方雨虹建筑材料有限公司 | The test device and method of testing of asphalt adhesive spill-out |
| CN107870220B (en) * | 2017-09-21 | 2021-03-26 | 杭州东方雨虹建筑材料有限公司 | Asphalt mastic overflowing amount testing device and testing method |
| CN109085069A (en) * | 2018-07-19 | 2018-12-25 | 中铁隧道股份有限公司 | Tunnel surrounding structural face shear strength test data acquisition device and test method |
| CN114971364A (en) * | 2022-06-14 | 2022-08-30 | 苏交科集团股份有限公司 | Risk assessment method and system for container stacking place |
| CN114971364B (en) * | 2022-06-14 | 2022-12-09 | 苏交科集团股份有限公司 | Risk assessment method and system for container stacking place |
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Application publication date: 20160330 |