CN102877401A - 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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- CN102877401A CN102877401A CN2012103437073A CN201210343707A CN102877401A CN 102877401 A CN102877401 A CN 102877401A CN 2012103437073 A CN2012103437073 A CN 2012103437073A CN 201210343707 A CN201210343707 A CN 201210343707A CN 102877401 A CN102877401 A CN 102877401A
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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, specifically the detection method of reinforcing bar distortion in a kind of continuous reinforced concrete pavement.
Background technology
Along with to based on the going deep into of the Design of Continuous Reinforced Concrete Pavement research of mechanics, the pavement detection instrument has become the important tool of road structure response under monitoring ground surface material Performance Decay and the load.Yet, the not good installation position of considering sensor in the prior art, the data of measurement can not well tally with the actual situation.And the acquisition mode of sensor signal also all is step, is not continous way.
Summary of the invention
Technical assignment of the present invention is for above-mentioned the deficiencies in the prior art, and the detection method that a kind of DATA REASONING is accurate, can better reflect the interior reinforcing bar distortion of continuous reinforced concrete pavement of the inner reinforcing bar distortion of continuous reinforced concrete pavement actual conditions is provided.
Technical assignment of the present invention is realized in the following manner: the detection method of reinforcing bar distortion in the continuous reinforced concrete pavement, be characterized in special reinforced strain meter is installed on certain rule the appropriate location of the inner reinforcing bar in rigid pavement, after continuous automatic data acquisition system (ADAS) image data, data are carried out analyzing and processing to obtain the deformation of reinforcing bar in the rigid pavement: described reinforcing steel strain gauge is installed on the surface of reinforcing bar, and is connected with data collecting system by wire, sensor connector.
Described special reinforced strain meter preferably is installed on the longitudinal reinforcement upper surface below the outer wheel trajectories line.
The position of described outer wheel trajectories line can determine that it determines that method is those skilled in the art's common practise according to outer traffic lane line center line.
Based on stress distribution characteristics and reappearance, near the intersection of longitudinal reinforcement and continuous two transverse reinforcements, 13 special reinforced strain meters are installed preferably,
Wherein, respectively lay in an identical manner 5 special reinforced strain meters at two continuous intersection points; Respectively lay 1 special reinforced strain meter at three continuous mid points, a middle intermediate point that mid point is above-mentioned continuous two intersection points.
Be laid in 5 special reinforced strain meters of intersection point of longitudinal reinforcement and transverse reinforcement, 1 is laid in position of intersecting point, all the other 4 symmetric positions that are laid in respectively intersection point longitudinal separation intersection point a rice, 3a rice, 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.
The detection method of reinforcing bar distortion compared with prior art has following outstanding beneficial effect in the continuous reinforced concrete pavement of the present invention:
(1) special reinforced strain meter is reasonably laid in position according to measuring needs, has adapted to reinforcement stresses characteristic distributions in the road surface, has satisfied the reproducible requirement of data acquisition, make survey data more accurate, more meet the road surface actual conditions.As: the intensive at a certain distance laying strain meter of the intersection of the longitudinal reinforcement at wheel trajectories line place and transverse reinforcement outside;
(2) special reinforced strain meter Reasonable Arrangement in position in conjunction with the continuously use of automated collection systems, can be realized automatically gathering continuously of data.
Description of drawings
Accompanying drawing 1 is the horizontal plane arrangement diagram of special-purpose reinforcing steel strain gauge among the embodiment;
Accompanying drawing 2 is vertical plane arrangement diagrams of strain meter shown in Figure 1;
Accompanying drawing 3 is continuous automated collection systems structural representations among the embodiment.
The specific embodiment
Explain below the detection method of reinforcing bar distortion in the continuous reinforced concrete pavement of the present invention being done with specific embodiment with reference to Figure of description.
Embodiment:
The implementation step of the detection method of reinforcing bar distortion is in the continuous reinforced concrete pavement:
One, 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 of outer wheel trajectories line downside according to outer traffic lane line center line, and at 13 installation site b of upper surface mark of longitudinal reinforcement 1.Wherein, installation site b of each mark of position of intersecting point of longitudinal reinforcement 1 and 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) installation site b of each mark of position; At the longitudinal reinforcement 1 position of intersecting point longitudinal separation 3a(a=50mm with transverse reinforcement 3, transverse reinforcement 4) installation site b of each mark of position; Installation site b of position mark at longitudinal reinforcement 1 mid point between transverse reinforcement 2 and transverse reinforcement 3; Installation site b of position mark at longitudinal reinforcement 1 mid point between transverse reinforcement 3 and transverse reinforcement 4; Installation site b of position mark at longitudinal reinforcement 1 mid point between transverse reinforcement 4 and transverse reinforcement 5.
Two, special reinforced strain meter (the general strain meter that the accurate group of U.S.'s prestige generation produces, model: CEA-06-125UN-350) are installed
A, installed surface are prepared
Before building pavement concrete, at b place, the installation site of assembling reinforcement, get a plane with the angle grinding machine first, the plane is as far as possible shallow, otherwise can affect the intensity of reinforcing bar, then use sand paper that the plane is polished smooth, use at last absolute ethyl alcohol and acetone to clean up.
B, special reinforced strain meter are installed
Use special-purpose rapid curing strain gage adhesive (auxiliary products of special reinforced strain meter) evenly to spread upon on the installed surface, then reinforcing steel strain gauge being parallel to longitudinal reinforcement pastes, cover one deck polytetrafluoroethylene film on the strain meter, compressive strain meter surface 3 minutes at last press...withes one's finger.The sensitive grid direction of reinforcing steel strain gauge is parallel to longitudinal reinforcement.
C, the protection of special reinforced strain meter
Use 704 protection glue to be covered in the strain meter surface; after the 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 the 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, use continuous automated collection systems image data
Automated collection systems is produced by U.S. Campbell scientific company, formed by data acquisition module (CR-1000), expansion module (AM16/32B RELAY MULTIPLEXER), power module (PS100) and sensor connector module (4WFBS350), be connected round-the-clock automatic data collection (as shown in Figure 3) with above-mentioned special reinforced strain meter.
Four, data analysis is processed
After using the LoggerNet software download data, utilize Excel software, data are processed and analyzed 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 (5)
1. the detection method that reinforcing bar is out of shape in the continuous reinforced concrete pavement, it is characterized in that: the appropriate location that special reinforced strain meter is installed on the inner reinforcing bar in rigid pavement with certain rule, after continuous automatic data acquisition system (ADAS) image data, data are carried out analyzing and processing to obtain the deformation of reinforcing bar in the rigid pavement:
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.
2. the detection method that reinforcing bar is out of shape in the continuous reinforced concrete pavement according to claim 1, it is characterized in that: described special reinforced strain meter is installed on the longitudinal reinforcement upper surface below the outer wheel trajectories line.
3. the detection method that reinforcing bar is out of shape in the continuous reinforced concrete pavement according to claim 1 is characterized in that: near the intersection of longitudinal reinforcement and continuous two transverse reinforcements, 13 special reinforced strain meters are installed,
Wherein, respectively lay in an identical manner 5 special reinforced strain meters at two continuous intersection points;
Respectively lay 1 special reinforced strain meter at three continuous mid points.
4. the detection method that reinforcing bar is out of shape in the continuous reinforced concrete pavement according to claim 3, it is characterized in that: be laid in 5 special reinforced strain meters of intersection point of longitudinal reinforcement and transverse reinforcement, 1 is laid in position of intersecting point, all the other 4 symmetric positions that are laid in respectively intersection point longitudinal separation intersection point a rice, 3a rice, a=50mm.
5. the detection method that reinforcing bar is out of shape in the continuous reinforced concrete pavement according to claim 1, it is characterized in that: the sensitive grid direction of special reinforced strain meter is parallel to longitudinal reinforcement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210343707.3A CN102877401B (en) | 2012-09-17 | 2012-09-17 | Method for detecting deformation of steel bar in continuous reinforced concrete pavement |
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| CN201210343707.3A CN102877401B (en) | 2012-09-17 | 2012-09-17 | Method for detecting deformation of steel bar in continuous reinforced concrete pavement |
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| CN102877401A true CN102877401A (en) | 2013-01-16 |
| CN102877401B CN102877401B (en) | 2015-02-04 |
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| CN109564431A (en) * | 2016-09-12 | 2019-04-02 | 索尤若驱动有限及两合公司 | For guiding the system and method for vehicle |
| CN109661630A (en) * | 2016-09-12 | 2019-04-19 | 索尤若驱动有限及两合公司 | Method and system for position sensing |
| CN110081845A (en) * | 2019-05-30 | 2019-08-02 | 福州大学 | Cement pavement morning age three-dimensional full panel warped shapes monitoring device and implementation method |
| CN114777642A (en) * | 2022-03-16 | 2022-07-22 | 交通运输部公路科学研究所 | In-service concrete pavement slab passes three-dimensional space position detecting system of lotus component |
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| CN110081845A (en) * | 2019-05-30 | 2019-08-02 | 福州大学 | Cement pavement morning age three-dimensional full panel warped shapes monitoring device and implementation 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 |
| CN114777642A (en) * | 2022-03-16 | 2022-07-22 | 交通运输部公路科学研究所 | In-service concrete pavement slab passes three-dimensional space position detecting system of lotus component |
| 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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| CN102877401B (en) | 2015-02-04 |
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