CN204139038U - A kind of detection system being applicable to backman beam method test road surface rebound deflection - Google Patents
A kind of detection system being applicable to backman beam method test road surface rebound deflection Download PDFInfo
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- CN204139038U CN204139038U CN201420362006.9U CN201420362006U CN204139038U CN 204139038 U CN204139038 U CN 204139038U CN 201420362006 U CN201420362006 U CN 201420362006U CN 204139038 U CN204139038 U CN 204139038U
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Abstract
The utility model belongs to Pavement Performance valuator device technical field, specifically, relates to a kind of detection system being applicable to backman beam method test road surface rebound deflection.This detection system comprises deflection testing car, backman beam, fulcrum, dial gage, dial framework; Described backman beam is fixed on road surface by fulcrum, and backman beam is divided into forearm and postbrachium two parts by fulcrum, and deflection testing car is corresponding to forearm side, and postbrachium tail end connects dial gage; Described dial gage is fixed on road surface by support; Described deflection testing car is that two rear axle eight takes turns lorry.Compared with prior art, it is load wagon that two rear axles eight that a kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model have employed three axles take turns lorry, and specification relevant parameter, make it more be tending towards standardization.The standard vehicle that this inspection vehicle can be used as roadbed, pavement deflection detects, can be applied in roadbed, road surface final acceptance of construction and maintenance better.
Description
Technical field
The utility model belongs to Pavement Performance valuator device technical field, specifically, relates to a kind of detection system being applicable to backman beam method test road surface rebound deflection.
Background technology
Flexible pavement can produce vertical deformation under load action, and after load action, distortion can recover, and the part deflection that can recover is exactly flexure.Deflection value is exactly the bulk strength reflecting each level in road surface on the whole, and the intensity of roadbed generally reflects by the modulus of resilience.If deflection value is excessive, its distortion is also larger, and each layer in road surface also just easily breaks.Deflection value is excessive, the material property of the general and each layer in road surface of its reason, thickness, and globality (whether knot tying), degree of compaction etc. are relevant, also relevant with weather conditions, and rainy season can be bigger than normal.Flexure, as an important characteristic index of roadbed, road surface supporting capacity, plays vital effect in road construction, design and examination.
At present, the method for testing of domestic and international pavement deflection mainly contains backman beam method, autodeflectometer method, Falling Weight Deflectometer method.Backman beam method is applicable to the rebound deflection value measuring roadbed, flexible pavement.At present, backman beam method measures road surface subgrade resilient flexure and mainly adopts mechanical displacement test device method.Mechanical displacement test device generally uses the mechanical displacement meter of dial gage to measure road surface subgrade resilient deflection value by backman beam.The method is easy to install and use, and reading is directly perceived, will use inspection vehicle in its measuring process.Regulation in China " highway subgrade road surface on-the-spot test code JTG E60-2008 ", when roadbed, road surface carry out the detection of flexure amount, test vehicle should meet " standard vehicle " parameter.But the vehicle output that current China meets " standard vehicle " parameter reduces increasingly, and the phenomenon of not " standard " appears in standard vehicle when causing roadbed, pavement deflection to measure.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of detection system being applicable to backman beam method test road surface rebound deflection.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model comprises deflection testing car 2, backman beam 3, fulcrum 4, dial gage 5, dial framework 6; Described backman beam 3 is fixed on road surface 1 by fulcrum 4, and backman beam 3 is divided into forearm 31 and postbrachium 32 two parts by fulcrum 4, and deflection testing car 2 correspondence is in forearm 31 side, and postbrachium 32 tail end connects dial gage 5; Described dial gage 5 is fixed on road surface 1 by support 6; Described deflection testing car 2 is that two rear axle eight takes turns lorry.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, two rear axle standard axle loads of described deflection testing car 2 are 200 ± 1kN, two rear axle wheelbase 1350mm.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, every rear flank wheel load of described deflection testing car 2 is 50 ± 0.5kN.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, the inflation pressure of tire of described deflection testing car 2 is 1.20 ± 0.05MPa, and single-wheel pressure transmission face diameter of equivalent circle is 18.15 ± 0.5cm.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, rear front axle 7 and the rear axle 8 load-carrying difference of described deflection testing car 2 are less than 2kN.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, described deflection testing car 2 is provided with four flexure measuring points altogether, wherein two flexure measuring points are located between the wheel gap of rear axle 8, and another two are located at inside the wheel of rear axle 8.
A kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model, it is 3-5cm that described two flexure measuring points of taking turns between gap are positioned at along direction of traffic forward travel distance; Described two flexure measuring point distance tire inside edge distances of taking turns inner side are 3-5cm.
Compared with prior art, it is load wagon that two rear axles eight that a kind of detection system being applicable to backman beam method test road surface rebound deflection described in the utility model have employed three axles take turns lorry, and specification relevant parameter, make it more be tending towards standardization.The standard vehicle that this inspection vehicle can be used as roadbed, pavement deflection detects, can be applied in roadbed, road surface final acceptance of construction and maintenance better.
Accompanying drawing explanation
Fig. 1: detection system structural representation;
Fig. 2: the two rear axle schematic diagram of deflection testing car, the direction of arrow is direction of traffic;
Road surface-1, deflection testing car-2, backman beam-3, forearm-31, postbrachium-32, fulcrum-4, dial gage-5, dial framework-6, rear front axle-7, rear rear axle-8.
Detailed description of the invention
Below in conjunction with specific embodiment, the detection system being applicable to backman beam method test road surface rebound deflection described in the utility model is described further, but protection domain of the present utility model is not limited to this.
Embodiment 1
The detection system of the backman beam method that the is applicable to test road surface rebound deflection of the utility model design, described detection system comprises deflection testing car 2, backman beam 3, fulcrum 4, dial gage 5, dial framework 6; Described backman beam 3 is fixed on road surface 1 by fulcrum 4, and backman beam 3 is divided into forearm 31 and postbrachium 32 two parts by fulcrum 4, and deflection testing car 2 correspondence is in forearm 31 side, and postbrachium 32 tail end connects dial gage 5; Described dial gage 5 is fixed on road surface 1 by support 6; Described deflection testing car 2 is that two rear axle eight takes turns lorry; Two rear axle standard axle loads of described deflection testing car 2 are 200kN, two rear axle wheelbase 1350mm; Every rear flank wheel load of described deflection testing car 2 is 50kN; The inflation pressure of tire of described deflection testing car 2 is 1.20MPa, and single-wheel pressure transmission face diameter of equivalent circle is 18.15cm; Rear front axle 7 and the rear axle 8 load-carrying difference of described deflection testing car 2 are 1kN; Described deflection testing car 2 is provided with four flexure measuring points altogether, has inside two and wheel and have two between the wheel gap of rear axle 8; It is 4cm that described two flexure measuring points of taking turns between gap are positioned at along direction of traffic forward travel distance; Described two flexure measuring point distance tire inside edge distances of taking turns inner side are 4cm.
In use, operating procedure is specific as follows: 1) check and keep measuring with the vehicle condition of two rear axle car and braking ability good, pressure of tire conforms with the regulations the blowing pressure; 2) load in automobile recessing, weighbridge weighs rear axle gross mass, and ensures 20t; Cargo location in adjustment automobile recessing, ensures the harmony that two rear axle front axle and rear axle axle carry, and makes two rear axle rear axle load be 1kN with two rear axle front axle load difference; In running car and mensuration process, axle must not weigh and changed, and in recessing, goods relative position must not change; 3) on smooth, smooth hard surfacing, tire-contact area is measured, accurately to 0.1cm2; 4) on the wheel path in road surface running vehicle track, arrange measuring point, and mark with on white oil paint or drawing with coloured chalk; 5) 5.4m Benkleman beam deflectometer is adopted to measure; Benkelman beams deflectometer gauge head being placed on 1#, 2#, 3#, 4# measuring point, and dial gage being installed on the analyzing rod of benkelman beams deflectometer, and dial gage is returned to zero, checking that back to zero stablized by dial gage by gently detaining benkelman beams deflectometer; 6) 5.4m Benkleman beam deflectometer is adopted to carry out a point deformation correction to the Benkleman beam deflectometer in step 5 in addition; 7) mensuration person blows a whistle to issue an order and commands automobile slowly to advance, and the speed that automobile advances is preferably about 5km/h; When dial gage indicator forwards maximum value to, dial gage initial reading L1, L3 in rapid read step 5, step 6; Roll away from after the flexure radius of influence until automobile, dial gage end readout L2, L4 again in read step 5, step 6; 8) flexure amount is calculated.
Compared with prior art, be described in the utility modelly a kind ofly applicable to two rear axles eight that detection system that backman beam method surveys road surface rebound deflection have employed three axles to take turns lorry be load wagon, and specification relevant parameter, make it more be tending towards standardization.The standard vehicle that this inspection vehicle can be used as roadbed, pavement deflection detects, can be applied in roadbed, road surface final acceptance of construction and maintenance better.
Claims (7)
1. one kind is applicable to the detection system of backman beam method test road surface rebound deflection, it is characterized in that, described detection system comprises deflection testing car (2), backman beam (3), fulcrum (4), dial gage (5), dial framework (6); Described backman beam (3) is fixed on road surface (1) by fulcrum (4), backman beam (3) is divided into forearm (31) and postbrachium (32) two parts by fulcrum (4), deflection testing car (2) is corresponding to forearm (31) side, and postbrachium (32) tail end connects dial gage (5); Described dial gage (5) is fixed on road surface (1) by support (6); Described deflection testing car (2) is that two rear axle eight takes turns lorry.
2. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 1, it is characterized in that, two rear axle standard axle loads of described deflection testing car (2) are 200 ± 1kN, two rear axle wheelbase 1350mm.
3. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 1, is characterized in that, every rear flank wheel load of described deflection testing car (2) is 50 ± 0.5kN.
4. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 1, it is characterized in that, the inflation pressure of tire of described deflection testing car (2) is 1.20 ± 0.05MPa, and single-wheel pressure transmission face diameter of equivalent circle is 18.15 ± 0.5cm.
5. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 1, it is characterized in that, rear front axle (7) and rear axle (8) the load-carrying difference of described deflection testing car (2) are less than 2kN.
6. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 1, it is characterized in that, described deflection testing car (2) is provided with four flexure measuring points altogether, wherein two flexure measuring points are located between the wheel gap of rear axle (8), and another two are located at inside the wheel of rear axle (8).
7. a kind of detection system being applicable to backman beam method test road surface rebound deflection according to claim 6, it is characterized in that, it is 3-5cm that described two flexure measuring points of taking turns between gap are positioned at along direction of traffic forward travel distance; Described two flexure measuring point distance tire inside edge distances of taking turns inner side are 3-5cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362006.9U CN204139038U (en) | 2014-07-01 | 2014-07-01 | A kind of detection system being applicable to backman beam method test road surface rebound deflection |
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| CN201420362006.9U CN204139038U (en) | 2014-07-01 | 2014-07-01 | A kind of detection system being applicable to backman beam method test road surface rebound deflection |
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| CN204139038U true CN204139038U (en) | 2015-02-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806695A (en) * | 2016-03-01 | 2016-07-27 | 中铁城市规划设计研究院有限公司 | Viscoelasticity springback deformation based pavement detection equipment |
| CN106368203A (en) * | 2016-11-02 | 2017-02-01 | 山西省交通科学研究院 | Method for detecting deflection of Benkelman beam of roadbed based on double-rear-axle heavy duty truck |
| CN106522189A (en) * | 2016-11-02 | 2017-03-22 | 山西省交通科学研究院 | Roadbed Beckman beam deflection detecting method based on wheel inner side measuring point |
| CN108301296A (en) * | 2018-04-11 | 2018-07-20 | 江苏恒达工程检测有限公司 | Pavement deflection automatic detection device based on backman beam method |
| CN114753219A (en) * | 2022-04-08 | 2022-07-15 | 广州市市政工程设计研究总院有限公司 | Road springback and deflection detection device based on Beckman beam method and use method |
-
2014
- 2014-07-01 CN CN201420362006.9U patent/CN204139038U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806695A (en) * | 2016-03-01 | 2016-07-27 | 中铁城市规划设计研究院有限公司 | Viscoelasticity springback deformation based pavement detection equipment |
| CN106368203A (en) * | 2016-11-02 | 2017-02-01 | 山西省交通科学研究院 | Method for detecting deflection of Benkelman beam of roadbed based on double-rear-axle heavy duty truck |
| CN106522189A (en) * | 2016-11-02 | 2017-03-22 | 山西省交通科学研究院 | Roadbed Beckman beam deflection detecting method based on wheel inner side measuring point |
| CN108301296A (en) * | 2018-04-11 | 2018-07-20 | 江苏恒达工程检测有限公司 | Pavement deflection automatic detection device based on backman beam method |
| CN108301296B (en) * | 2018-04-11 | 2023-09-29 | 江苏恒达工程检测有限公司 | Automatic pavement deflection detection device based on Beckman beam method |
| CN114753219A (en) * | 2022-04-08 | 2022-07-15 | 广州市市政工程设计研究总院有限公司 | Road springback and deflection detection device based on Beckman beam method and use method |
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Granted publication date: 20150204 Termination date: 20190701 |
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