CN102877401B - Method for detecting deformation of steel bar in continuous reinforced concrete pavement - Google Patents
Method for detecting deformation of steel bar in continuous reinforced concrete pavement Download PDFInfo
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- CN102877401B CN102877401B CN201210343707.3A CN201210343707A CN102877401B CN 102877401 B CN102877401 B CN 102877401B CN 201210343707 A CN201210343707 A CN 201210343707A CN 102877401 B CN102877401 B CN 102877401B
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- concrete pavement
- reinforcing bar
- steel bar
- reinforced concrete
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Abstract
The invention discloses a method for detecting the deformation of a steel bar in a continuous reinforced concrete pavement, which belongs to the field of road engineering tests. The method comprises the following steps of: mounting a special steel bar strain gauge at an appropriate position of the steel bar inside the concrete pavement according to a certain rule; and after data are acquired by a continuous automatic data acquisition system, analyzing the data to acquire the deformation condition of the steel bar in the concrete pavement. Compared with the prior art, the method for detecting the deformation of the steel bar in the continuous reinforced concrete pavement has the characteristics of data measurement accuracy, capability of well reflecting the actual deformation condition of the steel bar inside the continuous reinforced concrete pavement and the like, and is extremely high in popularization value and application value.
Description
Technical field
The present invention relates to highway construction test field, the detection method of specifically reinforcing bar distortion in a kind of continuous reinforced concrete pavement.
Background technology
Along with going deep into the Design of Continuous Reinforced Concrete Pavement research based on mechanics, pavement detection instrument become monitoring ground surface material Performance Decay and load effect under road structure response important tool.But well do not consider the installation position of sensor in prior art, the data of measurement can not well tally with the actual situation.Further, the acquisition mode of sensor signal is also all step, and discontinuous.
Summary of the invention
Technical assignment of the present invention is for above-mentioned the deficiencies in the prior art, provide a kind of DATA REASONING accurately, the detection method of reinforcing bar distortion in the continuous reinforced concrete pavement that better can reflect continuous reinforced concrete pavement inner reinforcing bar distortion actual conditions.
Technical assignment of the present invention realizes in the following manner: the detection method of reinforcing bar distortion in continuous reinforced concrete pavement, be characterized in the appropriate location special reinforced strain meter being installed on the inner reinforcing bar in rigid pavement with certain rule, after continuous automatic data acquisition system (ADAS) image data, analyzing and processing is carried out to obtain the deformation of reinforcing bar in rigid pavement to data: described reinforcing steel strain gauge is installed on the surface of reinforcing bar, and be connected with data collecting system by wire, sensor connector.
Described special reinforced strain meter is preferably installed on the longitudinal reinforcement upper surface below outer wheel trajectories line.
The position of described outer wheel trajectories line can be determined according to outer traffic lane line center line, and its defining method is the common practise of those skilled in the art.
Based on stress distribution feature and reappearance, near the intersection of longitudinal reinforcement and continuous two transverse reinforcements, preferably 13 special reinforced strain meters are installed,
Wherein, respectively 5 special reinforced strain meters are laid in an identical manner at continuous print two intersection points; 1 special reinforced strain meter is respectively laid, a middle mid point and the intermediate point of above-mentioned continuous two intersection points at continuous print three mid points.
Be laid in 5 special reinforced strain meters of the intersection point of longitudinal reinforcement and transverse reinforcement, 1 is laid in position of intersecting point, all the other 4 symmetric positions being laid in intersection point longitudinal separation intersection point a rice, 3a rice respectively, a=50mm.
In order to increase the accuracy of DATA REASONING, the sensitive grid direction of special reinforced strain meter is parallel to longitudinal reinforcement.
In continuous reinforced concrete pavement of the present invention, the detection method of reinforcing bar distortion compared with prior art has following outstanding beneficial effect:
(1) special reinforced strain meter needs reasonably to lay in position according to measurement, has adapted to reinforcement stresses characteristic distributions in road surface, has met the reproducible requirement of data acquisition, made survey data more accurately, more meet road surface actual conditions.As: the intensive at a certain distance laying strain meter of the longitudinal reinforcement at wheel trajectories line place and the intersection of transverse reinforcement outside;
(2) special reinforced strain meter Reasonable Arrangement in position, in conjunction with the use of continuous automated collection systems, can realize automatically gathering continuously of data.
Accompanying drawing explanation
Accompanying drawing 1 is the horizontal plane arrangement diagram of special reinforcing steel strain gauge in embodiment;
Accompanying drawing 2 is vertical plane arrangement diagrams of strain meter shown in Fig. 1;
Accompanying drawing 3 is continuous automated collection systems structural representations in embodiment.
Detailed description of the invention
Be described in detail below with the detection method of specific embodiment to reinforcing bar distortion in continuous reinforced concrete pavement of the present invention with reference to Figure of description.
Embodiment:
In continuous reinforced concrete pavement, the concrete implementation step of the detection method of reinforcing bar distortion is:
One, as shown in accompanying drawing 1,2, the position of the special reinforced strain meter of mark installment on the reinforcing bar on continuous reinforcement concrete test road.
Determine the longitudinal reinforcement 1 on the downside of outer wheel trajectories line according to outer traffic lane line center line, and mark 13 installation site b at the upper surface of longitudinal reinforcement 1.Wherein, longitudinal reinforcement 1 respectively marks an installation site b with the position of intersecting point of transverse reinforcement 3, transverse reinforcement 4; At the longitudinal reinforcement 1 position of intersecting point longitudinal separation a(a=50mm with transverse reinforcement 3, transverse reinforcement 4) position respectively mark an installation site b; At the longitudinal reinforcement 1 position of intersecting point longitudinal separation 3a(a=50mm with transverse reinforcement 3, transverse reinforcement 4) position respectively mark an installation site b; At position mark installation site b of longitudinal reinforcement 1 mid point between transverse reinforcement 2 and transverse reinforcement 3; At position mark installation site b of longitudinal reinforcement 1 mid point between transverse reinforcement 3 and transverse reinforcement 4; At position mark installation site b of longitudinal reinforcement 1 mid point between transverse reinforcement 4 and transverse reinforcement 5.
Special reinforced strain meter (the general strain meter that the accurate group of U.S.'s prestige generation produces, model: CEA-06-125UN-350) two, is installed
A, installed surface prepare
Before building pavement concrete, at the b place, installation site of assembling reinforcement, first get a plane with angle grinding machine, plane is as far as possible shallow, otherwise the intensity of reinforcing bar can be affected, then use sand paper plane to be polished smooth, finally use absolute ethyl alcohol and acetone to clean up.
B, special reinforced strain meter are installed
Use special rapid curing strain gage adhesive (auxiliary products of special reinforced strain meter) uniform application on installed surface, then reinforcing steel strain gauge is parallel to longitudinal reinforcement to paste, strain meter covers one deck polytetrafluoroethylene film, finally press with finger 3 minutes, strain meter surface.The sensitive grid direction of reinforcing steel strain gauge is parallel to longitudinal reinforcement.
C, special reinforced strain meter are protected
704 protecting glue are used to be covered in strain meter surface; after adhesive curing to be protected, use aluminium foil to carry out last one deck protection, topping plays the effect of mechanical protection and electromagnetic shielding; notice that topping area is as far as possible little, reduce the impact of strain meter installation site road pavement.When building pavement concrete, note avoiding vibrating spear to destroy reinforcing steel strain gauge.
Three, continuous automated collection systems image data is used
Automated collection systems is produced by Campbell scientific company of the U.S., be made up of data acquisition module (CR-1000), expansion module (AM16/32B RELAY MULTIPLEXER), power module (PS100) and sensor connector module (4WFBS350), be connected with above-mentioned special reinforced strain meter, round-the-clock automatic data collection (as shown in Figure 3).
Four, Data Analysis Services
After using LoggerNet software download data, utilize Excel software, data are processed and analyzes to obtain the distortion of reinforcing bar.
The design formulas of reinforcing bar distortion is as follows:
μStrain = 4x10
3*Vr/(GF(1-2*10
-3*Vr))
Wherein:
Vr = Vn-V0；
Vn: currency;
V0: initial value;
GF: gauge factor.
Claims (3)
1. the detection method of reinforcing bar distortion in continuous reinforced concrete pavement, it is characterized in that: the appropriate location special reinforced strain meter being installed on the inner reinforcing bar in rigid pavement with certain rule, after continuous automatic data acquisition system (ADAS) image data, analyzing and processing is carried out to obtain the deformation of reinforcing bar in rigid pavement to data:
Described reinforcing steel strain gauge is installed on the upper surface of reinforcing bar, and is connected with data collecting system by wire, sensor connector,
Near the intersection of longitudinal reinforcement and continuous two transverse reinforcements, 13 special reinforced strain meters are installed,
Wherein, respectively 5 special reinforced strain meters are laid in an identical manner at continuous print two intersection points; 1 special reinforced strain meter is respectively laid at continuous print three mid points,
Be laid in 5 special reinforced strain meters of the intersection point of longitudinal reinforcement and transverse reinforcement, 1 is laid in position of intersecting point, all the other 4 symmetric positions being laid in intersection point longitudinal separation intersection point a rice, 3a rice respectively, a=50mm.
2. the detection method of reinforcing bar distortion in continuous reinforced concrete pavement according to claim 1, is characterized in that: described special reinforced strain meter is installed on the longitudinal reinforcement upper surface below outer wheel trajectories line.
3. the detection method of reinforcing bar distortion in continuous reinforced concrete pavement according to claim 1, is characterized in that: the sensitive grid direction of special reinforced strain meter is parallel to longitudinal reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210343707.3A CN102877401B (en) | 2012-09-17 | 2012-09-17 | Method for detecting deformation of steel bar in continuous reinforced concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210343707.3A CN102877401B (en) | 2012-09-17 | 2012-09-17 | Method for detecting deformation of steel bar in continuous reinforced concrete pavement |
Publications (2)
| Publication Number | Publication Date |
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| CN102877401A CN102877401A (en) | 2013-01-16 |
| CN102877401B true CN102877401B (en) | 2015-02-04 |
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| CN201210343707.3A Expired - Fee Related CN102877401B (en) | 2012-09-17 | 2012-09-17 | Method for detecting deformation of steel bar in continuous reinforced concrete pavement |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102017006686A1 (en) * | 2016-09-12 | 2018-03-15 | Sew-Eurodrive Gmbh & Co Kg | System and method for operating a vehicle |
| WO2018046134A1 (en) * | 2016-09-12 | 2018-03-15 | Sew-Eurodrive Gmbh & Co. Kg | Method and system for position capture |
| CN106524989B (en) * | 2016-12-14 | 2022-09-02 | 上海建工一建集团有限公司 | Large-scale foundation pit support deformation automatic analysis system and data analysis method |
| CN110081845B (en) * | 2019-05-30 | 2020-05-08 | 福州大学 | Device for monitoring warping shape of three-dimensional comprehensive plate of cement pavement in early age and implementation method |
| CN114777642B (en) * | 2022-03-16 | 2023-07-28 | 交通运输部公路科学研究所 | Three-dimensional space position detection system for load transmission component of in-service concrete pavement slab |
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| CN101246157A (en) * | 2008-03-21 | 2008-08-20 | 山东省交通科学研究所 | Asphalt concrete pavement stress-strain detecting method and system |
| CN201173819Y (en) * | 2008-03-10 | 2008-12-31 | 陕西科技大学 | Road surface checking device |
| CN101696878A (en) * | 2009-10-23 | 2010-04-21 | 山东省交通科学研究所 | Method for detecting stress and strain of road surface |
| JP3161599U (en) * | 2010-05-23 | 2010-08-05 | 和男 足立 | Rebar fixing method improvement for tie bar holder. |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201173819Y (en) * | 2008-03-10 | 2008-12-31 | 陕西科技大学 | Road surface checking device |
| CN101246157A (en) * | 2008-03-21 | 2008-08-20 | 山东省交通科学研究所 | Asphalt concrete pavement stress-strain detecting method and system |
| CN101696878A (en) * | 2009-10-23 | 2010-04-21 | 山东省交通科学研究所 | Method for detecting stress and strain of road surface |
| JP3161599U (en) * | 2010-05-23 | 2010-08-05 | 和男 足立 | Rebar fixing method improvement for tie bar holder. |
Non-Patent Citations (1)
| Title |
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| 分布式光纤传感器用于桥梁和路面的健康监测;高俊启等;《防灾减灾工程学报》;20050330(第01期);参见第17页第4段-第18页第2段及图2、6、7 * |
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