JP2000213929A - Structure remote monitoring device - Google Patents

Abstract

(57) [Problem] To provide a structure remote monitoring device capable of monitoring the state of a structure at a disaster site that is difficult to approach in a remote place where damage is not caused. A limit displacement sensor (20) is provided at a joint portion of each bridge girder (11) of a bridge (10) to detect when the relative displacement amount of each adjacent bridge girder (11) reaches a predetermined amount. The sensors 20 are connected to a relay station 40 via a communication cable 30. Further, the relay station 40 and a remote monitoring device 50 are connected via a communication network 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bridge, a viaduct, and the like.
The present invention relates to a structure monitoring device that monitors a relative displacement of a unit structure in a remote place in a structure constructed by combining unit structures.

[0002]

2. Description of the Related Art In the event that a bridge or viaduct is damaged during an earthquake or other disaster and it is difficult to approach the site of the disaster, it is possible to directly observe the sky from an airplane or helicopter or analyze the captured images. The damage situation is being grasped.

[0003]

However, it is impossible to cover the entire affected area by using an image observed or photographed from above using an airplane or a helicopter at the time of a disaster. There is a problem that it is difficult to grasp the delicate damage situation, such as the fact that it is possible to confirm the grave damage such as the drop of the bridge girder, but not to the fall of the bridge girder but the passage is impossible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an object of monitoring a structure at a disaster site that is difficult to approach in a remote place where damage is not caused. The purpose is to provide.

[0005]

According to the present invention, there is provided a remote monitoring apparatus for a structure, comprising: a bridge constructed by continuous arrangement of bridge girders; At each joint portion of the unit structure where relative displacement is expected, limit displacement detecting means for detecting when a relative displacement amount of an adjacent unit structure reaches a predetermined predetermined amount is disposed, respectively. A relay unit disposed near the object, connected to the limit displacement detection unit of each joint part, collectively collects those signals, and connected to the communication unit, and connected to the relay unit via the communication unit. And a remote monitoring means capable of confirming a signal of each of the limit displacement detecting means at a remote place.

The above-mentioned structure is a bridge in which bridge girders are continuously arranged, and the limit displacement detecting means comprises a sensor cable to be energized is stretched between adjacent bridge girders, and a relative displacement of the bridge girders is provided. When the amount reaches a predetermined amount, the bridge bridge is cut off and becomes unable to conduct electricity, so that a relative displacement of the adjacent bridge girder equal to or more than a predetermined amount is detected.

Further, the limit displacement detecting means includes a pair of energized sensor cables arranged between the adjacent bridge girders in an X shape substantially in parallel with the plate surface of the floor slab, and intersecting with the plate surface of the floor slab. The two sensor cables are cut off due to a relative displacement of a predetermined amount or more in the direction in which the current flows, and the power is not supplied.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a conceptual configuration diagram of a bridge remote monitoring apparatus in which one example of a structure remote monitoring apparatus according to the present invention is applied to a bridge, and FIG. FIG.
(B) is a plan view thereof.

The illustrated bridge 10 is constructed by supporting both ends of each bridge girder 11... (11A, 11B, 11C, 11D) as unit constituent members on a pier 12 via a bearing 13. … Is an I-shaped steel girder 11a
Is an I-shaped girder bridge on which the RC slab 11b is supported.

At the joints of the bridge girders 11, there are provided limit displacement sensors 20 (20A, 20A) as limit displacement detecting means.
B, 20C), and each limit displacement sensor 20
Are connected via a communication cable 30 to a relay station 40 as relay means, and the relay station 40 and a monitoring device 50 as remote monitoring means are connected via a communication network 60.

The limit displacement sensor 20 is shown in FIG.
A pair of sensor cables 21A and 21B is stretched between main beams 11a of adjacent bridge beams 11A and 11B, as shown in a plan view which is an enlarged view of an X portion of FIG. , 21B are energized to detect whether or not the power is supplied.

The sensor cables 21A and 21B are connected to the main girder 1
The ends are fixed to the lower surface of the upper flange 1a, respectively, and are arranged in an X-shape (that is, an X-shape when viewed from the plane side) in a plane parallel to the plate surface of the floor slab 11b. When the sensor cables 21A and 21B are energized and both sensor cables 21A and 21B are cut off, the energization is disabled and the signal changes. The length of the sensor cables 21A and 21B is
4A and 4B, a relative vertical step amount on the upper surface of the upper surface of the floor slab 11a is a predetermined amount that makes it difficult for the vehicle to pass as shown in a plan view in FIG. 4A and a front view in FIG. It is set to be disconnected when the above is reached.

The limit displacement sensor 20 constructed as described above
When the adjacent bridge girders 11A and 11B are relatively displaced in the vertical direction, which is the direction intersecting with the plate surface of the floor slab 11a, and a step that makes it difficult for the vehicle to pass through occurs, as shown in FIG. Both 21A and 21B are cut off and the current cannot be supplied, thereby detecting that the relative vertical difference between the bridge girders 11A and 11B has exceeded a predetermined amount. On the other hand, when the adjacent bridge girders 11A and 11B are relatively displaced in a horizontal direction which is a direction parallel to the plate surface of the floor slab 11a, as shown in a plan view in FIG. 5A and a front view in FIG. The sensor cable 21A on the side where the fixed portion is separated is cut off by a predetermined amount of relative displacement, but the other sensor cable 21B on the loose side is not cut off, so that power cannot be supplied and the signal does not change.

That is, only when the relative height difference between the upper surfaces of the adjacent bridge girders 11A and 11B in the vertical direction is equal to or greater than a predetermined height that makes it difficult for the vehicle to pass, the signal is changed and detected. It is something that has become. The power supply to the cable sensors 21A and 21B may be performed at predetermined time intervals or may be performed only when necessary according to a command from the relay station 40.

The relay station 40 is constituted by a computer provided with an emergency power supply, and reads the detection information (whether or not power is supplied) from each of the limit displacement sensors 20 and stores it in a storage device. In addition, it is connected to a communication network 60 such as the Internet via a telephone line, for example. The connection to the communication network 60 can be appropriately changed, for example, by using satellite communication without using a telephone line.

The monitoring device 50 is constituted by a computer having a display device, is connected to a communication network 60, and can read information held by the relay station 40.

According to the bridge remote monitoring device 50 configured as described above, even when it is difficult to approach the site when a disaster such as an earthquake occurs, the monitoring device 50 relays the data via the communication network 60. Connect to bureau 40, and each bridge girder 1
It is possible to confirm whether or not the step at the joint portion of 1... Is of such a degree as to allow the vehicle to pass. That is, it is possible to grasp the state of the bridge in a remote place where damage is not possible.

The limit displacement detecting means is not limited to the above structure, but may be any device capable of detecting a predetermined amount of relative displacement between adjacent unit structural members (bridge girders 11A and 11B), and can be changed as appropriate. . Further, it is needless to say that the present invention is applicable not only to bridges but also to other structures.

[0020]

As described above, according to the bridge remote monitoring apparatus of the present invention, in a structure constructed by combining unit structures, such as a bridge in which bridge girders are continuously arranged, a relative structure is obtained. At each joint portion of the unit structure where displacement is expected, limit displacement detecting means for detecting when the relative displacement amount of the adjacent unit structure reaches a predetermined predetermined amount is arranged, and in the vicinity of the structure, It is arranged and connected to the limit displacement detecting means of each joint part, collects those signals collectively, and is a relay means connected to the communication means, and connected to the relay means via the communication means and connected to each other at a remote place. And remote monitoring means capable of confirming the signal of the limit displacement detecting means, whereby the remote monitoring means is connected to the relay means via the communication means to detect each joint portion by the limit displacement detecting means. Confirm information Rukoto in, can be a unit structure in the joint portion to grasp whether or not the relative displacement above a predetermined amount. Therefore, even in the event of a disaster such as an earthquake that cannot be approached to the site, detailed information can be obtained at a remote location where damage is not possible without relying on images.

Further, the structure is a bridge in which bridge girders are continuously arranged, and the limit displacement detecting means is such that a sensor cable to be energized is stretched between adjacent bridge girders and the relative displacement amount of the bridge girders is determined. By detecting the relative displacement of the adjacent bridge girder by a predetermined amount or more by cutting off when the amount reaches the fixed amount and making it impossible to conduct electricity, it is possible to detect the relative displacement at the joint part of the bridge girder with a simple configuration Can be.

Further, the limit displacement detecting means is provided with a pair of energized sensor cables arranged between the adjacent bridge girders in an X-shape substantially parallel to the plate surface of the floor slab, and in a direction intersecting with the plate surface of the floor slab. Since the two sensor cables are cut off due to a relative displacement of a predetermined amount or more and become incapable of energization, and this is detected, the direction of displacement detection can be given. That is, it detects sensitively the level difference caused by the relative displacement in the direction intersecting the slab of the floor slab at the joint portion that interferes with the traffic of the vehicle, but does not detect the relative displacement in the horizontal direction that does not hinder the traffic of the vehicle. It can be set to be insensitive.

[Brief description of the drawings]

FIG. 1 is a conceptual configuration diagram of a bridge remote monitoring device in which one configuration example of a structure remote monitoring device according to the present invention is applied to a bridge.

FIG. 2A is a sectional view taken along line AA of FIG. 1, and FIG. 2B is a plan view thereof.

3A and 3B show a limit displacement sensor, FIG. 3A is a plan view showing an enlarged view of a portion X in FIG. 2, and FIG. 3B is a front view thereof.

FIG. 4 shows a state where the floor slab is relatively displaced in the vertical direction,
(A) is a plan view and (B) is a front view.

FIG. 5 shows a state in which the floor slab is relatively displaced in the horizontal direction,
(A) is a plan view and (B) is a front view.

[Explanation of symbols]

 Reference Signs List 10 bridge 11 bridge girder (unit structure) 11b floor slab 20 limit displacement sensor (limit displacement detection means) 20A, 20B sensor cable 30 communication cable 40 relay station (relay means) 50 monitoring device (remote monitoring means) 60 communication network

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F063 AA04 AA28 BA14 BD03 BD09 CA03 CA40 DA02 DA04 DC08 DD06 FA08 KA02 NA01 NA02 NA06 ZA01 2F069 AA04 AA06 AA12 AA68 BB40 DD03 DD17 GG01 GG06 GG66 HH30 MM04 QQ03 A5BB11 DD02 DD20 EE02 EE10 EE17 EE18 FF01 FF03 FF04 FF14 FF16 FF19 FF23 GG09 GG18 GG23 GG30 GG31 GG37 GG70

Claims (4)

[Claims] In a structure constructed by combining unit structures, at each joint portion of the unit structure where relative displacement is expected,
Limit displacement detecting means for detecting when the relative displacement amount of the adjacent unit structure reaches a predetermined amount is provided, and the limit displacement detecting means for each joint portion is disposed near the structure. A relay unit connected to collectively collect those signals and connected to the communication unit, and connected to the relay unit via the communication unit to check the signals of the limit displacement detection units at a remote location. A remote monitoring device for a structure, comprising: 2. The bridge according to claim 1, wherein the bridge girder is a bridge in which bridge girders are continuously arranged, and the limit displacement detecting means detects when the relative displacement of the adjacent bridge girders reaches a predetermined amount. The structure remote monitoring apparatus according to claim 1, wherein the structure is configured as follows. 3. The limit displacement detection means, wherein a sensor cable to be energized is stretched between the adjacent floor slabs, and cuts off when a relative displacement amount of the bridge girder reaches a predetermined amount to disable the energization. The structure remote monitoring apparatus according to claim 2, wherein the apparatus is configured to detect a relative displacement of the adjacent bridge girder by a predetermined amount or more. 4. The limit displacement detecting means includes a pair of energized sensor cables disposed between the adjacent bridge girders in an X-shape substantially parallel to the plate surface of the floor slab, and intersecting with the plate surface of the floor slab. 4. The structure remote monitoring device according to claim 3, wherein both sensor cables are cut off due to a relative displacement of a predetermined amount or more in a direction in which the current flows, and the sensor cable is cut off to detect the current. .