CN102297811B - Method for detecting inter-laminar shear stress and strain of asphalt road - Google Patents
Method for detecting inter-laminar shear stress and strain of asphalt road Download PDFInfo
- Publication number
- CN102297811B CN102297811B CN 201110141429 CN201110141429A CN102297811B CN 102297811 B CN102297811 B CN 102297811B CN 201110141429 CN201110141429 CN 201110141429 CN 201110141429 A CN201110141429 A CN 201110141429A CN 102297811 B CN102297811 B CN 102297811B
- Authority
- CN
- China
- Prior art keywords
- strain
- quartzy
- strain transducer
- prefabricated section
- test
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
- Road Repair (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a method for detecting inter-laminar shear stress and strain of asphalt road. The method comprises the following steps: after two quartz strain sensors are installed in the middle of two prefabricated asphalt blocks, the two asphalt blocks are stuck integrally and embedded in a test road surface; by means of loading of a test vehicle, road surface response data is collected; and the inter-laminar shear stress and strain of the asphalt road surface can be analyzed. The inter-laminar shear stress and strain of the asphalt road surface can be analyzed accurately according to the test data obtained by utilizing the method; compared with the prior art, the method for detecting the inter-laminar shear stress and strain of the asphalt road disclosed by the invention has good measurement precision and good popularization and application value and accords with the practical road condition; and the method can be widely applied to the technical research of interior stress states and detection of the road under the action of traffic load.
Description
Technical field
The present invention relates to a kind of inner structure performance research field of asphalt roads, relate to a kind of detection method, more specifically is a kind of asphalt roads interlayer shear method for detecting stress and strain.
Background technology
Road inner structure dynamic response is the important component part of asphalt roads long-term behaviour monitoring.China also drops into substantial contribution, builds test site and facility, is used for the response of research road inner structure.For a long time, flexural tensile stress China mostly is road table flexure and brea bed to the research of bituminous pavement inner structure at the bottom of, and do not consider the impact of interlayer shear stress, in fact, the shear stress that road surface structare layer stands is excessive, will cause that bituminous pavement top bag occurs gathering around, pushes, the destruction such as slippage, rut and shear fracture.Yet, the detection method of shear stress strain between pair path layer is seldom arranged in the prior art.
Summary of the invention
For defective or deficiency that above-mentioned prior art exists, one object of the present invention is, a kind of detection method that detects the strain of bituminous pavement interlayer shear stress is provided.
In order to realize above-mentioned task, the present invention takes following technical solution to be achieved:
A kind of asphalt roads interlayer shear method for detecting stress and strain, it is characterized in that, the method is installed at least two quartzy strain transducers in the middle of two prefabricated pitch prefabricated sections, then two pitch prefabricated sections are sticked into one and be embedded in Surface of Trial Pavement, load dynamically for the pitch prefabricated section by test vehicle, gather the road surface response data by quartzy strain transducer, by charge amplifier connection data Acquisition Instrument, obtain test vehicle to the response data of road inside, be used for analyzing the strain of bituminous pavement interlayer shear stress.
Specifically may further comprise the steps:
The selection of a, strain transducer: for the characteristics of shear stress between path layer, select quartzy strain transducer, and quartzy strain transducer is drawn cable protection;
B, pitch prefabricated section are made: adopt the asphalt of the material source identical with the test section, identical grating to carry out the prefabricated section making, reserve in two prefabricated section relevant positions two quartzy strain transducer locational spaces are installed, the demoulding namely gets the pitch prefabricated section;
C, strain transducer are installed: grinding process is carried out on the pitch prefabricated section surface that contacts with quartzy strain transducer sensitive area that will make, requiring pretightning force to carry out sensor according to quartzy strain transducer fixes, then carries out two pitch prefabricated section seams fixed with epoxy resin;
D, test section make and are used for settling pitch prefabricated section pit: at the correct position excavation of test section and the pit of pitch prefabricated section formed objects, be used for settling the pitch prefabricated section;
E, the test of pitch prefabricated section are installed: the pitch prefabricated section that will install quartzy strain transducer is placed in the pit of test section, and the quartzy strain transducer cable of drawing is protected;
F, Test Data Collecting: quartzy strain transducer is drawn cable connect by charge amplifier and data collecting instrument, utilize test vehicle that dynamic load is carried out in the asphalt blocks position that quartzy strain transducer is housed, gather the road surface response data by quartzy strain transducer, be sent to data collecting instrument through the charge amplifier amplification, obtain test vehicle to the response data of road inside, be used for analyzing the strain of bituminous pavement interlayer shear stress.
Asphalt roads inter-laminar stress strain detecting method of the present invention compared with prior art has following outstanding beneficial effect:
(1) adopt the quartz type strain transducer, by suitable installation method, can test accurately the shear stress between the road interior layer, this sensor has high natural frequency, is fit to very much the measurement of dynamic strain under the high-speed motion load.
(2) making of the indoor asphalt prefabricated section uncertainty that can effectively reduce the site operation factor causes adverse effect to the accuracy of measurement of sensor.
(3) adopt the asphalt of the material source identical with the test section, identical grating to make the pitch prefabricated section, can overcome the impact that test findings and road actual conditions there are differences, improve accuracy of detection.
(4) the fast face of the pitch that contacts with the sensor sensing face adopts the method for polishing to process, and has avoided the coarse impact on sensor test of asphalt surface, has improved accuracy of detection.
(5) adopt two asphalt blocks sensor installations, seam is fixed with epoxy resin, can effectively simulate the layer structure of actual bituminous pavement, and make things convenient for the installation of sensor.
Description of drawings
Fig. 1 is the test unit figure of asphalt roads interlayer shear method for detecting stress and strain of the present invention;
Fig. 2 is the mounting arrangements vertical view of strain transducer in the pitch prefabricated section among the present invention;
Fig. 3 is the mounting arrangements side view of strain transducer in the pitch prefabricated section among the present invention;
Fig. 4 is that the actual road test medium pitch piece of asphalt roads interlayer shear method for detecting stress and strain of the present invention is arranged and test road location figure;
Mark among the figure represents respectively: 1, the first quartz type strain transducer; 2, the second quartz type strain transducer; 3, pitch prefabricated section A; 4, pitch prefabricated section B.
The present invention is described in further detail below in conjunction with embodiment that accompanying drawing and inventor provide.
Embodiment
With reference to Fig. 1～Fig. 4, with specific embodiment bituminous pavement interlayer shear stress strain detecting method of the present invention is described in detail below.
Adopt quartzy strain transducer, charge amplifier, data collecting instrument and associated cable composition data acquisition system, quartzy strain transducer is connected with charge amplifier by cable, and charge amplifier is converted to voltage signal with charge signal and is transferred to data collecting instrument and gathers storage.Present embodiment is selected the high-speed data acquisition instrument.
Quartzy strain transducer is installed in two pitch prefabricated section centre positions, the pitch prefabricated section is installed in the test section and the test section becomes one, roll across with certain speed of a motor vehicle tire above the pitch prefabricated section that strain transducer is housed by test vehicle, get final product the acquisition test vehicle to the response data of road inside.Can study size and the characteristic of bituminous pavement interlayer shear stress strain under the respective external load by the response data that collects, for research asphalt roads inner structure provides foundation in the characteristic under the load.
Quartzy strain transducer is sensor of the prior art, and its design feature is fit to the strain of test shear stress, selects Kistler9232A.
Concrete detection method:
(1) make the first pitch prefabricated section A and the second pitch prefabricated section B: two pitch prefabricated sections adopt the material source identical with Experiment Road, the asphalt of identical grating, by compaction moulding in the situation of simulated field construction property, and reserve the position that 2 quartzy strain transducers are installed.
(2) quartzy strain transducer is installed: the second pitch prefabricated section B that will make carries out grinding process with the surface that quartzy strain transducer sensitive area contacts, require pretightning force that the first quartzy strain transducer 1 and the second quartzy strain transducer 2 are fixed according to sensor, then the first pitch prefabricated section A is covered and be equipped with on the second pitch prefabricated section B of two quartzy strain transducers, with epoxy resin the first prefabricated section A and the second pitch prefabricated section B seam are carried out fixedly, see accompanying drawing 2 and accompanying drawing 3.
(3) test section settles pitch prefabricated section pit to make: at the pit of correct position excavation in test section with bonding pitch prefabricated section formed objects, be used for settling the pitch prefabricated section.
(4) be placed in the pit of the middle test section of step (3) installing two quartzy strain transducers and bonding pitch prefabricated section in the step (2).
(5) connect data acquisition system (DAS) according to accompanying drawing 1, test vehicle crosses the pitch prefabricated section that quartzy strain transducer is housed with certain speed it is loaded, and accompanying drawing 4 is seen in the response of test pitch prefabricated section internal dynamic.In the test findings, the first quartzy strain transducer 1 data measured size deducts the second quartzy strain transducer 2 data measureds size, be asphalt roads interlaminar shearing strain size under corresponding vehicle load, can obtain asphalt roads interlayer shear stress intensity under corresponding vehicle load by conversion.
Claims (3)
1. asphalt roads interlayer shear method for detecting stress and strain, it is characterized in that, the method is installed two quartzy strain transducers in the middle of two prefabricated pitch prefabricated sections, then two pitch prefabricated sections are sticked into one and be embedded in Surface of Trial Pavement, load dynamically for the pitch prefabricated section by test vehicle, gather the road surface response data by quartzy strain transducer, by charge amplifier connection data Acquisition Instrument, obtain test vehicle to the response data of road inside, be used for analyzing the strain of bituminous pavement interlayer shear stress;
Specifically may further comprise the steps:
The selection of a, strain transducer: for the characteristics of shear stress between path layer, select quartzy strain transducer, and quartzy strain transducer is drawn cable protection;
B, pitch prefabricated section are made: adopt the asphalt of the material source identical with the test section, identical grating to carry out the prefabricated section making, reserve the locational space that two quartzy strain transducers are installed in two prefabricated section relevant positions, the demoulding namely gets the pitch prefabricated section;
C, strain transducer are installed: grinding process is carried out on the pitch prefabricated section surface that contacts with quartzy strain transducer sensitive area that will make, requiring pretightning force to carry out sensor according to quartzy strain transducer fixes, then carries out two pitch prefabricated section seams fixed with epoxy resin;
D, test section make and are used for settling pitch prefabricated section pit: at the correct position excavation of test section and the pit of pitch prefabricated section formed objects, be used for settling the pitch prefabricated section;
E, the test of pitch prefabricated section are installed: the pitch prefabricated section that will install quartzy strain transducer is placed in the pit of test section, and the quartzy strain transducer cable of drawing is protected;
F, Test Data Collecting: quartzy strain transducer is drawn cable connect by charge amplifier and data collecting instrument, utilize test vehicle that dynamic load is carried out in the asphalt blocks position that quartzy strain transducer is housed, gather the road surface response data by quartzy strain transducer, be sent to data collecting instrument through the charge amplifier amplification, obtain test vehicle to the response data of road inside, be used for analyzing the strain of bituminous pavement interlayer shear stress.
2. the method for claim 1 is characterized in that, described quartzy strain transducer is selected Kistler9232A.
3. the method for claim 1 is characterized in that, described data collecting instrument is selected the high-speed data acquisition instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110141429 CN102297811B (en) | 2011-05-27 | 2011-05-27 | Method for detecting inter-laminar shear stress and strain of asphalt road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110141429 CN102297811B (en) | 2011-05-27 | 2011-05-27 | Method for detecting inter-laminar shear stress and strain of asphalt road |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297811A CN102297811A (en) | 2011-12-28 |
| CN102297811B true CN102297811B (en) | 2013-01-02 |
Family
ID=45358378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110141429 Expired - Fee Related CN102297811B (en) | 2011-05-27 | 2011-05-27 | Method for detecting inter-laminar shear stress and strain of asphalt road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297811B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075940B (en) * | 2013-03-29 | 2016-12-28 | 深圳市海洋王照明工程有限公司 | Spring cable test device |
| CN103335752A (en) * | 2013-06-20 | 2013-10-02 | 中山市拓维电子科技有限公司 | Remotely and dynamically surveying system and method for road pre-buried shear stress |
| CN104215365B (en) * | 2014-09-03 | 2017-01-25 | 哈尔滨工业大学 | Pavement structure layer internal shearing stress testing sensor and embedding technology and application thereof |
| CN105571509B (en) * | 2016-02-26 | 2018-06-12 | 长安大学 | A kind of sensor for being used to detect pavement structure complex stress condition |
| CN106680113B (en) * | 2017-01-17 | 2019-03-15 | 武汉理工大学 | Using the method for interlayer shear experimental evaluation road surface aging conditions |
| CN108426662A (en) * | 2018-03-12 | 2018-08-21 | 榆林学院 | A kind of road surface internal shearing stress measurement method |
| CN108507713A (en) * | 2018-04-02 | 2018-09-07 | 江苏中路工程检测有限公司 | A kind of stress detection device for road surface |
| CN109696399A (en) * | 2019-01-28 | 2019-04-30 | 华南理工大学 | It is a kind of for testing the experimental provision of bituminous pavement interlayer adhesive property |
| CN113376361B (en) * | 2021-05-21 | 2023-10-20 | 浙江大学 | Internal stress test method for driving asphalt cement to recover and heal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464239A (en) * | 2009-01-09 | 2009-06-24 | 长安大学 | Interlayer shear strength detecting instrument for asphalt pavement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6868738B2 (en) * | 2002-07-31 | 2005-03-22 | Troxler Electronic Laboratories, Inc. | Method and apparatus for determining the angle of gyration and/or the pressure in a gyratory compactor |
-
2011
- 2011-05-27 CN CN 201110141429 patent/CN102297811B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464239A (en) * | 2009-01-09 | 2009-06-24 | 长安大学 | Interlayer shear strength detecting instrument for asphalt pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102297811A (en) | 2011-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102297811B (en) | Method for detecting inter-laminar shear stress and strain of asphalt road | |
| Alavi et al. | Continuous health monitoring of pavement systems using smart sensing technology | |
| CN100547401C (en) | Test instrument for shrinking and deforming of road surface material | |
| CN102278947B (en) | Packaged FBG (Fiber Bragg Grating) sensor for strain and crack test of bituminous concrete road surface | |
| CN105442437B (en) | The shock insulation rubber bearing that a kind of working parameters can be monitored and be recognized | |
| TW201035416A (en) | Method for evaluating bridge safety with vibration measurement | |
| CN103335752A (en) | Remotely and dynamically surveying system and method for road pre-buried shear stress | |
| CN101246157A (en) | Asphalt concrete pavement stress-strain detecting method and system | |
| CN102243066A (en) | Hybrid-range FBG (fiber bragg grating) strain and crack sensor for concrete material package | |
| CN112630033B (en) | Buried road structure change monitoring device | |
| CN103674201A (en) | Piezoelectric intelligent road vehicle dynamic weighing apparatus | |
| CN102877401B (en) | Method for detecting deformation of steel bar in continuous reinforced concrete pavement | |
| CN107014528B (en) | Wheel-rail force online monitoring system, monitoring method and static calibration method | |
| CN102409705A (en) | System for monitoring and pre-warning pile foundation damage in real time | |
| Loulizi et al. | Data collection and management of the instrumented smart road flexible pavement sections | |
| CN104215365B (en) | Pavement structure layer internal shearing stress testing sensor and embedding technology and application thereof | |
| CN202814797U (en) | Testing device for uniaxial compressive modulus of elasticity | |
| Kunzler et al. | Fiber grating traffic monitoring systems | |
| CN202041182U (en) | Mixed range fibre Bragg grating (FBG) stress and crack sensor packaged by concrete material | |
| Ren et al. | Comparative evaluation of asphalt pavement dynamic response with different bases under moving vehicular loading | |
| CN203551067U (en) | Piezoelectric intelligent road-vehicle dynamic weighing device | |
| CN201355286Y (en) | Surface array dynamic stress sensor | |
| CN205157356U (en) | Steady basic unit's compactness spot test device of formula of dropping hammer water | |
| CN201555846U (en) | Vibration sensing device used for detecting highway roadbed | |
| Bhalla et al. | A COST-EFFECTIVE APPROACH FOR TRAFFIC MONITORING USING PIEZO-TRANSDUCERS. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20130102 Termination date: 20150527 |
|
| EXPY | Termination of patent right or utility model |