JP4223675B2 - Diagnosis method of bridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the diagnosis how the bridge.
[0002]
[Prior art]
In order to diagnose the deterioration state of bridge girder such as piers built in harbors and rivers, visual diagnosis and consultation from small ships have been performed. However, since this diagnosis is performed on a rocking ship, the accuracy is not sufficient and the working time is limited by the tide level. Therefore, as shown in FIG. 10, visual diagnosis and percussion in which a scaffold 25 is installed on the pedestal 24 are performed.
[0003]
[Problems to be solved by the invention]
However, the above diagnostic methods have the following problems.
(1) It was necessary to install a scaffold over the entire surface of the target bridge, which was a large financial burden.
(2) There was a restriction of working time due to the tide level during the installation, operation and dismantling of the scaffolding.
(3) In visual diagnosis and percussion, it was impossible to accurately diagnose fine cracks, their depth, and internal voids.
(4) Since the work was done by humans, the daily work volume was limited.
[0004]
The present invention has been made in view of the above problems, its object is not constrained like the tide, short time, and to provide a diagnostic how bridges a wide range of diagnostic can accurately It is.
[0005]
In order to solve the above problems, the bridge diagnosis method is to fasten and fix the split fixing ring to the lower pier of the bridge girder in the bridge, and to construct a guide member along the length direction of the bridge girder over these fixed rings. The diagnostic device is installed on the guide member, and the diagnostic device is configured by a drive wheel installed on one of the arms at the four corners of the carriage of the diagnostic device and a driven wheel installed on the other arm. The back surface of the bridge girder is heated by irradiation of light from the heating / illuminating device of the diagnostic device, and the heated back surface of the bridge girder is photographed with an infrared camera and a video camera. The bridge is intended to include rivers, lakes, pier is laid in the sea that, or highly crosslinked.
[0006]
The diagnostic device heats the back surface of the bridge girder by irradiating light while traveling along the guide member, images the temperature difference with an infrared camera, and diagnoses the degraded portion from the temperature distribution. Also, the back of the heated bridge girder is photographed with a video camera, and used as diagnostic data by the infrared camera. That is, a quick and accurate diagnosis can be easily performed by performing the temperature diagnosis and the visual diagnosis at the same time. Diagnosis of deterioration of jetty or viaduct built in rivers, lakes, seas, etc. can be performed quickly and accurately.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a bridge diagnosis method and apparatus according to the present invention will be described below with reference to the drawings. There are two embodiments of the bridge diagnosis method. In each embodiment, the same components are described with the same reference numerals, and only different components are described with different reference numerals.
[0008]
1 to 4 show a bridge diagnosis method according to the first embodiment, which is intended for a pier. The pier 1 is configured by installing a reinforced concrete bridge girder 3 on the head of a circular (or square) pedestal 2.
[0009]
In order to diagnose the deterioration of the pier 1, the guide member 4 is installed on the pedestal 2 of the bridge girder 3 to be diagnosed first. The guide member 4 is a rail, a wire rope, or the like, is laid between fixed metal fittings 5 installed at predetermined intervals in the length direction, and an intermediate portion is supported by a support metal fitting 6 of the pedestal 2. The fixing metal 5 is made of channel steel (or a similar steel material), and is installed on a support metal 6 provided on the pedestal 2 facing in the lateral direction.
[0010]
Next, the diagnostic device 7 is installed on the guide member 4. As shown in FIG. 2, the diagnostic device 7 includes a carriage 8, an infrared camera 9, a video camera 10, a heating / illuminating device 11, and a power source 12 installed on the carriage 8.
[0011]
The carriage 8 is suspended from the guide member 4 by the arms 14 installed at the four corners of the pedestal 13, and the wire 16 of the winding roller 15 in the fixing bracket 5 is bound to the hook 13 a protruding from the front and rear of the pedestal 13. ing. These winding rollers 15 are driven by remote control, and when one winding roller 15 winds the wire 16, the other winding roller 15 sends out the wire 16, and this is repeated alternately. As a result, the carriage 8 travels on the guide member 4. The winding roller 15 can also be installed on the bridge girder 3 using a pulley. Further, the cart 8 can be driven by installing a driving unit.
[0012]
In addition, the heating / illuminating device 11 is provided with a floodlight 17 that also serves as an illumination, and the floodlight 17 irradiates the back surface of the bridge girder 3a. The infrared camera 9 photographs a temperature difference of the bridge girder back surface 3a heated by the heating / illuminating device 11, and diagnoses a deteriorated portion such as a crack or a gap by the temperature distribution. Furthermore, the video camera 10 is a so-called CCD camera and photographs the bridge girder back surface 3a.
[0013]
The diagnostic device 7 installed on the guide member 4 as described above is irradiated with light from the projector 17 on the bridge girder back surface 3a while being run by the winding roller 15 by remote control. If the bridge girder back surface 3a heated by this light is photographed by the infrared camera 9 and the video camera 10, the temperature distribution due to the temperature difference generated in the cracked or voided part can be grasped and the cracked part can be visually observed. Then, a deteriorated portion of the bridge girder back surface 3a is diagnosed by using materials obtained by photographing with the infrared camera 9 and the video camera 10.
[0014]
After diagnosing a predetermined portion of the bridge girder back surface 3a by such a method, the guide member 4 is removed, and this is installed on the other pier 3 and diagnosed by the same method as described above. In addition, if the guide member 4 is installed over the entire length of the bridge girder back surface 3a to be diagnosed, the diagnosis can be performed without removing the guide member 4.
[0015]
5 to 9 show a bridge diagnosis method according to the second embodiment. First , as shown in FIG. 5 and FIG. 6, the split fixing ring 18 is fastened to the pedestal 2 below the bridge girder 3 , and the guide member 4 along the length direction of the bridge girder 3 is installed on the fixed ring. A diagnostic device 19 is installed on the guide member 4.
[0016]
As shown in FIGS. 8 and 9, the diagnostic device 19 includes a pulley 20 provided on an arm 14 of a pedestal 13, one of these pulleys 20 being a drive wheel 22 driven by a drive motor 21, and the other side being a driven wheel. 23. Thus, the diagnostic device 19 has the same configuration as the diagnostic device 7 of the first embodiment except that the arm 14 is provided with the pulley 20.
[0017]
Then, the diagnostic device 19 travels on the guide member 4 by driving the driving wheel 22 by remote control, diagnoses the deteriorated portion of the bridge girder back surface 3a by the same method as described above, and removes and installs the guide member 4 in the same manner as described above. The entire length of the bridge girder back surface 3a is diagnosed by repeating. In the same manner as described above, if the guide member 4 is installed over the entire length of the bridge girder back surface 3a to be diagnosed, the diagnosis can be performed without removing the guide member 4.
[0018]
In the above embodiment, the jetty is used as a target, but a viaduct on land can be diagnosed by the same method.
[0019]
【The invention's effect】
Diagnosis of the deterioration state of a pier or viaduct built in a port or the like can be performed quickly and accurately by temperature diagnosis and visual diagnosis.
[0020]
Diagnosis of the deterioration state of a pier or viaduct built in a harbor or the like can be performed with an automatic diagnosis device.
[0021]
Since it is possible to diagnose the deterioration state of a pier or viaduct built in a port without using a scaffold, it is possible to omit the installation / dismantling of the scaffold and shorten the diagnosis period.
[Brief description of the drawings]
FIG. 1 is a perspective view of a bridge diagnosis method according to a first embodiment.
FIG. 2 is a perspective view of a diagnostic apparatus.
FIG. 3 is a cross-sectional view of the bridge diagnosis method according to the first embodiment;
FIG. 4 is a cross-sectional view of the bridge diagnosis method according to the first embodiment;
FIG. 5 is a perspective view of a bridge diagnosis method according to a second embodiment;
FIG. 6 is a cross-sectional view of a bridge diagnosis method according to a second embodiment.
FIG. 7 is a cross-sectional view of a bridge diagnosis method according to a second embodiment.
8A is a front view of a drive wheel, and FIG. 8B is a side view thereof.
9A is a front view of a driven wheel, and FIG. 9B is a side view thereof.
FIG. 10 is a perspective view of a conventional bridge diagnosis method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pier 2, 24 Pedestal 3 Bridge girder 3a Bridge girder back surface 4 Guide member 5 Fixing bracket 6 Support bracket 7, 19 Diagnosis device 8 Cart 9 Infrared camera 10 Video camera 11 Heating / illumination device 12 Power supply 13 Base 13a Hook 14 Arm 15 Winding Roller 16 Wire 17 Floodlight 18 Fixed ring 20 Pulley 21 Drive motor 22 Drive wheel 23 Driven wheel 25 Scaffold

Claims (2)

A fixed ring split into two is fixed to the lower pier of the bridge girder in the bridge, a guide member is installed along the length direction of the bridge girder over these fixed rings, a diagnostic device is installed on the guide member, and the diagnostic device The diagnostic device travels on the guide member by the driving wheel installed on one of the arms at the four corners of the carriage and the driven wheel installed on the other arm, and the heating / illuminating device of the diagnostic device A method for diagnosing a bridge, comprising heating the back surface of the bridge girder by light irradiation and photographing the heated back surface of the bridge girder with an infrared camera and a video camera.   The bridge diagnosis method according to claim 1, wherein the bridge is a river, a lake, a pier built in the sea, or a viaduct.

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