CN105527165A - Test method and test device for asphalt pavement crack load response relative displacement - Google Patents
Test method and test device for asphalt pavement crack load response relative displacement Download PDFInfo
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- CN105527165A CN105527165A CN201610072543.3A CN201610072543A CN105527165A CN 105527165 A CN105527165 A CN 105527165A CN 201610072543 A CN201610072543 A CN 201610072543A CN 105527165 A CN105527165 A CN 105527165A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0037—Generation of the force using mechanical means involving a rotating movement, e.g. gearing, cam, eccentric, or centrifuge effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a test method and a test device for asphalt pavement crack load response relative displacement. The test method comprises steps as follows: a, a reference part and a sensor positioning part are arranged on two sides of a to-be-tested crack, and a horizontal linear displacement sensor and a vertical linear displacement sensor are fixedly arranged on the sensor positioning part; b, a test vehicle is stopped in positions of the reference part and the sensor positioning part in Step a; c, the sensors are started, the test vehicle slowly runs forwards and passes by the sensor positioning part and the reference part sequentially, after the test vehicle runs for a proper distance, the sensors are turned off, and the test is finished. The test device comprises the reference part, the sensor positioning part, the horizontal linear displacement sensor, the vertical linear displacement sensor and a controller. Compared with the prior art, the test method and the test device have the advantages that horizontal and vertical relative displacement between two plates of the crack can be measured accurately, and the cause and the development degree of the crack are determined through displacement features.
Description
Technical field
The present invention relates to a kind of bituminous pavement detection method, specifically a kind of asphalt pavement crack load response relative displacement method of testing and proving installation.
Background technology
Crack is that the various disease in road surface is accelerated to produce, worsen the main inducing increased the weight of.Although Producing reason and performance are not quite similar.Undeniable, crack is that entering of water provides passage, accelerates the generation of the diseases such as purt slurry, hole, hole, deformation and check crack, has also had a strong impact on the stability of overlay after highway intermediate maintenance cover.Carrying out suitable handle measure at the different phase fracture of crack progressing, avoid it upwards to develop, is the key technical problem being related to bituminous pavement serviceable life.
In prior art, conventional fracture deflection testing generally adopts Falling Weight Deflectometer (FWD) to detect, and not only measuring accuracy is low, more well cannot differentiate the information such as the origin cause of formation in crack, developing stage, crack relative displacement.Although by the test pit research origin cause of formation in crack and development feasible, road pavement infringement is too huge, therefore study a kind of effectively, reliable, efficiently Crack Detection detection method be necessary.
Summary of the invention
Technical assignment of the present invention is for above-mentioned the deficiencies in the prior art, a kind of asphalt pavement crack load response relative displacement method of testing is provided, the method accurately can measure the horizontal and vertical relative displacement between the plate body of two, crack, is determined the origin cause of formation and the development degree in crack by the feature of displacement.
The further technical assignment of the present invention is to provide the asphalt pavement crack load response relative displacement proving installation realizing said method.
Technical assignment of the present invention realizes in the following manner: asphalt pavement crack load response relative displacement method of testing, comprises the following steps:
A, standard is set in the side in crack to be measured, at the opposite side in crack to be measured, sensor localization part is set, described sensor localization part is fixedly installed horizontal linearity displacement transducer and vertical linearity displacement transducer, horizontal linearity displacement sensor end is vertical with a certain vertical plane of keeper and contact, and vertical linearity displacement sensor end is vertical with the certain level face of keeper and contact;
B, the bogie of taking turns with rear axle bilateral 4 are for testing vehicle, and make testing vehicle be parked in standard described in step a and sensor localization part place, testing vehicle rear tread is suitable distance from crack, and wheel gap mid point, standard, sensor localization part are point-blank;
C, start sensor, and test carriage is slowly moved forward, successively through sensor localization part, standard, after vehicle to be tested rolls suitable distance away from, vehicle stops, and closure sensor, completes test.
While carrying out above-mentioned test, can detect surveyed crack road table temperature, and in addition record, do to facilitate the origin cause of formation, developing stage etc. of fracture to differentiate further.
The crack measuring point selected needs comparatively straight.
As preferably, standard is vertical with crack with the line of sensor localization part.
Described standard can be that any one can provide the component of at least one vertical plane and at least one surface level, as rectangular parallelepiped, text body etc., but in order to reach best technique effect, described standard is preferably made up of vertical plate, leveling board, the L-shaped vertical setting of vertical plate, leveling board, horizontal linearity displacement sensor end is vertical with the vertical plane of vertical plate and contact, the horizontal plane of vertical linearity displacement sensor end and leveling board and contacting.
As preferably, standard and the sensor localization part lower limb near side, crack is 1-3cm apart from crack vertical range, and optimum distance is 1cm.
Described testing vehicle can adopt the load-carrying vehicle such as twin shaft of the prior art, three axles, preferred twin shaft bogie.
When crack is transverse joint, testing vehicle travel direction is road travel direction.
As preferably, in step b, when testing initial, testing vehicle rear tread is from crack 10 ~ 30cm, and the best is 15cm; In step c, after vehicle to be tested rolls 2-5m away from the speed of 5km/h, vehicle stops, and closure sensor, completes test.
The horizontal linearity displacement transducer of controller and the sample frequency of vertical linearity displacement transducer are preferably 100Hz, and acquisition precision is 0.01mm.
In order to better realize above-mentioned method of testing, the asphalt pavement crack load response relative displacement proving installation of preferred following structure is tested.
Described asphalt pavement crack load response relative displacement proving installation by with the use of standard and sensing system form, described standard there are at least one vertical plane and at least one surface level, described sensing system is formed primarily of sensor localization part, horizontal linearity displacement transducer, vertical linearity displacement transducer and controller, horizontal linearity displacement transducer is horizontally fixed on sensor localization part front end, and its measuring junction extends to outside sensor localization part, contact with standard one vertical plane; Vertical linearity displacement transducer is vertically fixed on the outside of sensor localization part front end, and its measuring junction contacts with standard one surface level; Controller is fixed on sensor localization part rear end, and horizontal linearity displacement transducer, vertical linearity displacement transducer are all connected with controller by data line.
Vertical plane, the surface level of standard and sensor measurement end in contact are smooth, and sensor measurement end and vertical plane, in the middle part of surface level, prevent load action lower sensor from deviating from the interface of standard.
Sensor localization part bottom surface is provided with leg.
Asphalt pavement crack load response relative displacement method of testing of the present invention and proving installation compared with prior art have following outstanding beneficial effect:
(1) under harmless condition, accurately can measure the horizontal and vertical relative displacement between the plate body of two, crack, determined the origin cause of formation and the development degree in crack by the feature of displacement;
(2) method of testing is simple and reliable, can formulate provide Data support for crack maintenance program in medium-capital overhauling maintenance.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of asphalt pavement crack load response relative displacement proving installation of the present invention;
Accompanying drawing 2 is vertical views of proving installation shown in Fig. 1;
Accompanying drawing 3 is the former pavement structure figure of bituminous pavement in embodiment two;
Accompanying drawing 4 is data acquisition patterns of embodiment two proving installation.
Embodiment
Asphalt pavement crack load response relative displacement method of testing of the present invention and proving installation are described in detail below with specific embodiment with reference to Figure of description.
Embodiment one:
As shown in accompanying drawing 1,2, asphalt pavement crack load response relative displacement proving installation of the present invention is formed primarily of standard 1, sensor localization part 2, horizontal linearity displacement transducer 3, vertical linearity displacement transducer 4, controller 5 and support 6.Wherein, sensor localization part 2, horizontal linearity displacement transducer 3, vertical linearity displacement transducer 4 and controller 5 form sensing system.
Described standard 1 forms " L " shape component by vertical plate, leveling board, and vertical plate, leveling board are mutually vertical.Vertical plane inside standard 1, surface level are smooth, for sensor measurement end in contact.
Described sensor localization part 2 is tabular, and support 6 is fixed on sensor localization part 2 front end, and controller 5 is fixed on sensor localization part 2 rear end.Sensor localization part 2 bottom surface is fixed with leg 9.
Horizontal linearity displacement transducer 3 is horizontally fixed on sensor localization part 2 front end by screw rod 7, and its measuring junction extends to outside sensor localization part 2, faces perpendicular contact directly with the medial shaft of standard 1.Vertical linearity displacement transducer 4 is vertically fixed on the outside of sensor localization part 2 front end by bolt 8, and its measuring junction contacts with the horizontal plane inside standard 1.Horizontal linearity displacement transducer 3 is all connected with controller 5 by data line 10 with vertical linearity displacement transducer 4.
Controller 5 pairs of data are collected and by Bluetooth wireless transmission technology with mobile interchange equipment connection.Controller 5 can in establish charged lithium cells, to meet equipment power demands.
Described horizontal linearity displacement transducer 3, vertical linearity displacement transducer 4 all can adopt LVDT sensor.
Embodiment two:
The concrete implementation step of asphalt pavement crack load response relative displacement method of testing is as follows:
(1) select the road surface transverse joint 11 that straight, former pavement structure as shown in Figure 3;
(2) detect institute to survey crack road and show temperature 25 DEG C, and in addition record;
(3) one section that selects that this crack 11 is more straight, the standard 1 of proving installation described in embodiment one is fixed to side, crack 11 by seccotine, and standard 1 edge is 1cm far from crack 11 vertical range, and parallel with surveyed crack section;
(4) sensing system of proving installation is fixed on the opposite side in crack 11 by seccotine, makes sensor localization part 2 lower edge parallel with crack 11 and align with standard 1, lower edge is 1cm apart from crack 11 vertical range.Require that sensor localization part 2 is vertical with crack 11 with the line of standard 1, the measuring junction of horizontal linearity displacement transducer 3 is faced directly vertical with the medial shaft of standard 1 and contacts completely; The measuring junction of vertical linearity displacement transducer 4 is with the horizontal plane inside standard 1 and contact completely;
(5) testing vehicle adopts twin shaft, the bogie that rear axle bilateral 4 is taken turns.Test carriage should adopt the automobile of rear axle 10T standard axle load BZZ-l00, and wheel clearance is wanted to meet proving installation and freely passed through;
Standard axle load BZZ-l00 meets following requirement:
(6) test carriage rear tread is from 15cm position, crack, and wheel gap mid point, standard and sensing system are point-blank;
(7) start sensor, makes sensor reading make zero, and data acquisition unit frequency is defined as 100Hz;
(8) tester commands test carriage slowly to move forward, first through analyzer standard, afterwards through sensing system (if crack is transverse joint, then test carriage travel direction is direction of traffic), vehicle tyre is forbidden touching analyzer, and Vehicle Speed 5km/h, rolls away from after 3m until automobile, vehicle stops, and closes analyzer.
As shown in Figure 4, concrete data are as follows for data acquisition pattern:
Claims (10)
1. an asphalt pavement crack load response relative displacement method of testing, is characterized in that comprising the following steps:
A, standard is set in the side in crack to be measured, at the opposite side in crack to be measured, sensor localization part is set, described sensor localization part is fixedly installed horizontal linearity displacement transducer and vertical linearity displacement transducer, horizontal linearity displacement sensor end is vertical with a certain vertical plane of keeper and contact, and vertical linearity displacement sensor end is vertical with the certain level face of keeper and contact;
B, the bogie of taking turns with rear axle bilateral 4 are for testing vehicle, and make testing vehicle be parked in standard described in step a and sensor localization part place, testing vehicle rear tread is suitable distance from crack, and wheel gap mid point, standard, sensor localization part are point-blank;
C, start sensor, and test carriage is slowly moved forward, successively through sensor localization part, standard, after vehicle to be tested rolls suitable distance away from, vehicle stops, and closure sensor, completes test.
2. asphalt pavement crack load response relative displacement method of testing according to claim 1, it is characterized in that, standard is vertical with crack with the line of sensor localization part.
3. asphalt pavement crack load response relative displacement method of testing according to claim 1 and 2, it is characterized in that, described standard is made up of vertical plate, leveling board, the L-shaped vertical setting of vertical plate, leveling board, horizontal linearity displacement sensor end is vertical with the vertical plane of vertical plate and contact, the horizontal plane of vertical linearity displacement sensor end and leveling board and contacting.
4. asphalt pavement crack load response relative displacement method of testing according to claim 3, is characterized in that, standard and the sensor localization part lower limb near side, crack is 1-3cm apart from crack vertical range.
5. asphalt pavement crack load response relative displacement method of testing according to claim 1, it is characterized in that, described testing vehicle is twin shaft bogie.
6. asphalt pavement crack load response relative displacement method of testing according to claim 1, is characterized in that, when crack is transverse joint, testing vehicle travel direction is road travel direction.
7. asphalt pavement crack load response relative displacement method of testing according to claim 1, it is characterized in that, in step b, when testing initial, testing vehicle rear tread is from crack 10 ~ 30cm;
In step c, after vehicle to be tested rolls 2-5m away from the speed of 5km/h, vehicle stops, and closure sensor, completes test.
8. asphalt pavement crack load response relative displacement proving installation, is characterized in that: by with the use of standard and sensing system form,
Described standard there are at least one vertical plane and at least one surface level,
Described sensing system is formed primarily of sensor localization part, horizontal linearity displacement transducer, vertical linearity displacement transducer and controller, horizontal linearity displacement transducer is horizontally fixed on sensor localization part front end, and its measuring junction extends to outside sensor localization part, contact with standard one vertical plane; Vertical linearity displacement transducer is vertically fixed on the outside of sensor localization part front end, and its measuring junction contacts with standard one surface level; Controller is fixed on sensor localization part rear end, and horizontal linearity displacement transducer, vertical linearity displacement transducer are all connected with controller by data line.
9. asphalt pavement crack load response relative displacement proving installation according to claim 8, it is characterized in that, sensor localization part bottom surface is provided with leg.
10. asphalt pavement crack load response relative displacement proving installation according to claim 8 or claim 9, it is characterized in that, described standard is made up of vertical plate, leveling board, the L-shaped vertical setting of vertical plate, leveling board, horizontal linearity displacement sensor end is vertical with the vertical plane of vertical plate and contact, the horizontal plane of vertical linearity displacement sensor end and leveling board and contacting.
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| CN201610072543.3A CN105527165B (en) | 2016-02-02 | 2016-02-02 | A kind of asphalt pavement crack load response relative displacement test method and test device |
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| CN201610072543.3A CN105527165B (en) | 2016-02-02 | 2016-02-02 | A kind of asphalt pavement crack load response relative displacement test method and test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644336A (en) * | 2016-11-02 | 2017-05-10 | 西安建筑科技大学 | Ground fracture-crossing experimental system and method for frame structure |
| CN108952208A (en) * | 2018-09-25 | 2018-12-07 | 深圳市志纵四海科技有限公司 | Object crack fix tool |
| CN109804232A (en) * | 2016-12-30 | 2019-05-24 | 同济大学 | A kind of asphalt pavement crack development degree detection method based on infrared thermal imagery map analysis |
| CN110702014A (en) * | 2019-11-26 | 2020-01-17 | 苏交科集团股份有限公司 | Crack monitoring device and method for road slope |
| CN110749296A (en) * | 2019-10-25 | 2020-02-04 | 杭州同圣土工材料有限公司 | Crack three-direction relative displacement measuring device with sensor and measuring method thereof |
| CN112213391A (en) * | 2020-10-15 | 2021-01-12 | 山东省交通科学研究院 | Nondestructive excitation inspection device for anchor rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002296159A (en) * | 2001-03-30 | 2002-10-09 | Matsumura Gumi Corp | Test apparatus for loading flat plate and recording medium |
| CN202330192U (en) * | 2011-11-24 | 2012-07-11 | 长安大学 | Test device capable of simulating actual road surface cracks through reflection cracks |
| CN203462390U (en) * | 2013-09-13 | 2014-03-05 | 江苏苏科畅联科技有限公司 | Multi-point falling weight type deflection detecting vehicle |
| CN104458398A (en) * | 2014-11-25 | 2015-03-25 | 中交第二公路勘察设计研究院有限公司 | Semi-rigid base asphalt pavement reflection crack testing device |
| CN104915480A (en) * | 2015-05-22 | 2015-09-16 | 山东省交通科学研究院 | Determination method for semi-rigid base bituminous pavement crack damage state |
| CN205426670U (en) * | 2016-02-02 | 2016-08-03 | 山东省交通科学研究院 | Bituminous paving crack load response relative displacement tester |
-
2016
- 2016-02-02 CN CN201610072543.3A patent/CN105527165B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002296159A (en) * | 2001-03-30 | 2002-10-09 | Matsumura Gumi Corp | Test apparatus for loading flat plate and recording medium |
| CN202330192U (en) * | 2011-11-24 | 2012-07-11 | 长安大学 | Test device capable of simulating actual road surface cracks through reflection cracks |
| CN203462390U (en) * | 2013-09-13 | 2014-03-05 | 江苏苏科畅联科技有限公司 | Multi-point falling weight type deflection detecting vehicle |
| CN104458398A (en) * | 2014-11-25 | 2015-03-25 | 中交第二公路勘察设计研究院有限公司 | Semi-rigid base asphalt pavement reflection crack testing device |
| CN104915480A (en) * | 2015-05-22 | 2015-09-16 | 山东省交通科学研究院 | Determination method for semi-rigid base bituminous pavement crack damage state |
| CN205426670U (en) * | 2016-02-02 | 2016-08-03 | 山东省交通科学研究院 | Bituminous paving crack load response relative displacement tester |
Non-Patent Citations (3)
| Title |
|---|
| 杨绍平，闫宗平: "《地质灾害防治技术》", 30 June 2015, 中国水利水电出版社 * |
| 程培峰，徐永丽: "《现代公路养护管理技术》", 31 July 2008, 东北林业大学出版社 * |
| 钱寅泉，周正茂，葛玮明，袁桂芳，韩光强2: "基于相对位移法的铰缝破损程度检测", 《公路交通科技》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644336A (en) * | 2016-11-02 | 2017-05-10 | 西安建筑科技大学 | Ground fracture-crossing experimental system and method for frame structure |
| CN106644336B (en) * | 2016-11-02 | 2019-02-22 | 西安建筑科技大学 | A kind of frame structure crosses over ground fissure experimental system and method |
| CN109804232A (en) * | 2016-12-30 | 2019-05-24 | 同济大学 | A kind of asphalt pavement crack development degree detection method based on infrared thermal imagery map analysis |
| CN108952208A (en) * | 2018-09-25 | 2018-12-07 | 深圳市志纵四海科技有限公司 | Object crack fix tool |
| CN108952208B (en) * | 2018-09-25 | 2024-03-26 | 深圳市志纵四海科技有限公司 | Object crack repairing tool |
| CN110749296A (en) * | 2019-10-25 | 2020-02-04 | 杭州同圣土工材料有限公司 | Crack three-direction relative displacement measuring device with sensor and measuring method thereof |
| CN110702014A (en) * | 2019-11-26 | 2020-01-17 | 苏交科集团股份有限公司 | Crack monitoring device and method for road slope |
| CN110702014B (en) * | 2019-11-26 | 2021-04-06 | 苏交科集团股份有限公司 | Crack monitoring device and method for road slope |
| CN112213391A (en) * | 2020-10-15 | 2021-01-12 | 山东省交通科学研究院 | Nondestructive excitation inspection device for anchor rod |
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