JP6230058B2 - Structure, relative movement detection method and retaining wall collapse sign detection method - Google Patents

Description

  The present invention detects the relative movement of the second member with respect to the structure and the first member configured to detect the presence or absence of relative movement between the members constituting the structure or the breakage of the member constituting the structure. The present invention relates to a relative movement detection method.

  Patent Document 1 discloses a concrete piece fall prevention sheet. This concrete piece fall prevention sheet is configured as a translucent prepreg sheet, and the concrete piece is prevented from peeling off by sticking it to a cold joint part of a concrete structure such as a tunnel and curing it. can do. In addition, since this sheet is translucent, the concrete surface to which the sheet is attached can be visually confirmed, and the presence or absence of cracks and the progress of the crack can be confirmed directly with eyes.

  Also, lighting equipment and smoke exhausting equipment are provided inside the tunnel, and these are supported and fixed to anchor bolts planted on the concrete wall in the tunnel.

JP 2001-271596 A

  Although a method for preventing peeling of a concrete piece in a concrete structure has been proposed in the past, a method for effectively preventing the anchor bolt from coming off has not been proposed. In addition, the inspection of looseness and dropout of the anchor bolt has been carried out by close visual inspection and sound and palpation, and it has not been possible to detect them reliably and efficiently.

  On the other hand, there is a risk that the anchor bolts may come loose or fall out, leading to a serious accident. It is essential to ensure the safety of anchor bolts in order to ensure safety. The same was true for distortions and the like in simple structures.

  An object of the present invention is to provide a structure configured to detect relative movement of the second member relative to the first member constituting the structure, and to detect relative movement of the second member relative to the first member. It is to provide a movement detection method.

  Another object of the present invention is to provide a structure configured to be able to detect breakage of a structural member constituting the structure.

The structure of the present invention includes a second member and a fiber reinforced plastic member, and the second member is a bolt member implanted in the first member so as to protrude from the surface of the first member. , and a washer member mounted on said bolt member, said fiber-reinforced plastic member, said surface being integral with the surface and the washer member of the first member, the relative said first member second When two members move relative to, said by the fiber-reinforced plastic member is discolored by the stress generated in the fiber reinforced plastic member, detectable in is configured relative movement occurs of the second member relative to the first member and said that you are.

Further, the structure of the present invention includes a concrete wall as a first member constituting the structure, another wall member or a column member as a second member fixedly arranged at a predetermined position with respect to the first member, A fiber reinforced plastic member integrated with the surface of the concrete wall and the surface of the other wall material or column material, and when the other wall material or column material moves relative to the concrete wall, The fiber reinforced plastic member is discolored by a stress generated in the fiber reinforced plastic member, so that the relative movement of the other wall material or the column material relative to the concrete wall can be detected.

In addition, a detection circuit is further provided, and the detection circuit includes a lead wire integrated with the fiber reinforced plastic member, and a notification unit, and the lead wire extends from the surface of the concrete wall to the other wall material or disposed so as to extend over the surface of the pillar, the said other wall material or column material against the concrete wall is relatively moved, the lead wires are disconnected, broken the notification means of the lead wire Is notified.

The structure of the present invention includes a first member constituting the structure, a second member fixedly disposed at a predetermined position with respect to the first member, a first surface of the first member, and the second member. A fiber reinforced plastic member integrated with the second surface; and a detection circuit, wherein the detection circuit includes a lead wire integrated with the fiber reinforced plastic member; Is arranged so as to straddle the first surface from the first surface, and when the second member moves relative to the first member, the lead wire is disconnected, and the notification means is connected to the lead. A plurality of second members are provided, and a plurality of the fiber reinforced plastic members, the notification means, and the lead wires are provided corresponding to the plurality of second members, and the plurality of notifications are provided. Means are connected in parallel And wherein the door.

In addition, the detection circuit further includes another notification unit electrically connected to the lead wire, and the plurality of lead wires and the other notification unit are connected in series.

The structure of the present invention includes a first member, a second member, a fiber reinforced plastic member, and a detection circuit that constitute the structure, and the second member protrudes from the surface of the first member. And a washer member attached to the bolt member, and the fiber-reinforced plastic member is integrated with the surface of the first member and the surface of the washer member. The detection circuit includes a lead wire integrated with the fiber reinforced plastic member, and a notification unit, and the lead wire straddles the surface of the washer member from the surface of the first member. When the second member moves relative to the first member, the lead wire is disconnected, and the notification means notifies the disconnection of the lead wire.

The structure of the present invention includes a first member constituting the structure, a second member fixedly arranged at a predetermined position with respect to the first member, a first surface of the first member, and a second member of the second member. A fiber reinforced plastic member integrated with a surface; and a detection circuit, wherein the detection circuit includes a first lead wire and a second lead wire integrated with the fiber reinforced plastic member, and an informing means. The first lead wire and the second lead wire are disposed so as to straddle the first surface from the first surface, the second lead wire being thicker than the first lead wire, and the first member When the second member moves relative to the first lead wire and the second lead wire, stress is applied to the first lead wire, and the notification means disconnects the first lead wire. To the first lead wire and the second lead wire. Ri said second lead wire and said first lead wire and a large stress is applied, characterized in that the disconnection.

The relative movement detection method of the present invention is a relative movement detection method for detecting the presence or absence of movement of the second member with respect to the first member constituting the structure, wherein the prepreg sheet is attached to the first surface of the first member and the second member. A step of laying over the second surface of the member, a step of passing a lead wire over the prepreg sheet so as to straddle the second surface from the first surface, and curing the prepreg sheet And obtaining a fiber reinforced plastic member integrated with the first member, the second member, and the lead wire, and the second member moves relative to the first member. The lead wire is disconnected, and the notification means notifies the disconnection of the lead wire .

The retaining wall collapse sign detection method according to the present invention uses a detection circuit to detect the retaining wall collapse sign in a road structure including a retaining wall and an asphalt road provided on the retaining wall. In the method, a fiber reinforced plastic member integrated with the road surface is provided on a road surface of the asphalt road, and the detection circuit includes a lead wire integrated with the fiber reinforced plastic member, An informing means for informing the disconnection, and when the road surface is cracked, the lead wire is disconnected, and the informing means notifies the disconnection of the lead wire, and based on the informing from the informing means, the retaining wall It is characterized by detecting signs of collapse.

According to structure creation of the present invention, when the second member relative to the first member moves relative, since fiber-reinforced plastic member is discolored by the stress generated in the fiber reinforced plastic member, a color state of the fiber-reinforced plastic Based on this, it is possible to know the relative movement of the second member relative to the first member. In addition, since the fiber reinforced plastic is configured to include a fibrous reinforcing material, even if relative movement of the second member occurs with respect to the first member, the degree of movement can be suppressed.

In addition, since the second member includes a bolt member and a washer member that is attached to the bolt member so as not to be slidable in the longitudinal direction, when the bolt member moves relative to the first member, the washer member is also integrated with the bolt member. Can be moved relative to each other. Further, since the surface of the washer member functions as the second surface, the relative movement of the bolt member with respect to the first member can be detected via the washer member.

Moreover, since the lead wire integrated with the fiber reinforced plastic member is arranged so as to straddle the first surface from the first surface, the lead wire is moved when the second member moves relative to the first member. Is disconnected, and when the lead wire is disconnected, the notifying means notifies this, so that the relative movement of the second member relative to the first member can be detected. In addition, as such a notification means, the light emission means etc. which light by receiving electric power supply from a power supply means via a lead wire etc. can be used, for example.

Moreover, since the some alerting | reporting means provided corresponding to the several 2nd member are connected in parallel, it can identify the disconnected lead wire easily.

In addition, since a plurality of lead wires and other informing means are connected in series, when any one of the lead wires is disconnected, the other informing means can be operated by always operating the other light emitting means. This will be notified, so that the occurrence of relative movement can be detected.

The fiber reinforced plastic member is integrated with the first surface of the first member and the second surface of the second member, and the lead wire is integrated with the fiber reinforced plastic member. When the second member moves relatively, the lead wire is disconnected, and the notifying means notifies this, so it is possible to detect the relative movement of the second member relative to the first member. In addition, since the fiber reinforced plastic member is configured to include a fibrous reinforcing material, even if relative movement of the second member occurs with respect to the first member, the degree of movement can be suppressed.

The perspective view which shows the structure which concerns on 1st Embodiment of this invention. II-II sectional view taken on the line in FIG. Sectional drawing explaining the formation method of the reinforced fiber plastic member in the structure shown in FIG. The top view which shows the structure which concerns on 2nd Embodiment of this invention. The figure explaining the identification method of the abnormal anchor bolt in the structure of FIG. The top view which shows the structure based on 3rd Embodiment of this invention. The top view which shows the structure based on 4th Embodiment of this invention. The top view which shows the structure based on 5th Embodiment of this invention. The perspective view which shows typically the structure which concerns on the modification of this invention. The perspective view which shows typically the structure which concerns on the other modification of this invention.

[First Embodiment]
Hereinafter, a structure according to a first embodiment of the present invention will be described with reference to the accompanying drawings. This structure is configured to be able to detect the relative movement of the second member with respect to the first member constituting the structure such as a tunnel or a bridge, for example. A concrete wall 2 shown in FIG. 1 is used as one member. The concrete wall 2 constitutes, for example, a tunnel wall.

  With reference to FIG.1 and FIG.2, the structure 1 which concerns on this embodiment is the concrete wall 2 mentioned above, and the anchor bolt (bolt member) 3 for supporting lighting equipment, a ventilator, etc. (not shown). A washer (washer member) 4, a transparent or translucent fiber reinforced plastic member (detecting means) 5, and a nut 6 screwed to the anchor bolt 3. The anchor bolt 3 is planted in the concrete wall 2 so that the tip portion protrudes from the concrete surface 21. The washer 4 is attached to the anchor bolt 3 so that the back surface 41 abuts against the concrete surface 21, and is not allowed to slide in the longitudinal direction of the anchor bolt 3. Therefore, when the anchor bolt 3 moves relative to the concrete wall 2 in the removal direction D, the washer 4 also moves relative to the anchor bolt 3 integrally.

  As the washer 4, for example, a plain washer or a spring washer (both not shown) that engages with the thread groove of the anchor bolt 3 can be used. Alternatively, a washer member (not shown) having an outer washer and a plurality of divided inner washers can be used. In this case, a divided inner is formed on both the inner peripheral surface of the outer washer and the screw groove of the anchor bolt 3. By engaging the washer, the outer washer and the divided inner washer are integrated, and the sliding movement with respect to the anchor bolt 3 can be disabled.

  The fiber reinforced plastic member 5 covers the surface 42 of the washer 4 and the region around the washer 4 of the concrete surface 21 and is formed integrally therewith. That is, the fiber reinforced plastic member 5 is formed larger than the surface area of the washer 4 and is disposed from the surface 42 of the washer 4 to the concrete surface 21 of the concrete wall 2. An opening 51 through which the anchor bolt 3 is inserted is formed in the central region of the fiber reinforced plastic member 5 so that the fiber reinforced plastic member 51 and the anchor bolt 3 are not in direct contact with each other. With this configuration, it is avoided that the fiber reinforced plastic member 5 is interposed between the nut 6 screwed to the anchor bolt 3 and the washer 4.

  The fiber reinforced plastic member 5 is formed by curing a prepreg sheet. The prepreg sheet refers to a fiber reinforced plastic molding material obtained by impregnating a fibrous reinforcing material such as glass cloth or carbon fiber with a photocurable or thermosetting resin. In the present embodiment, a transparent or translucent prepreg sheet using a glass cloth (glass fiber mat) and a visible light curable resin is used (for example, see JP-A-2001-271596). The fiber reinforced plastic member 5 obtained by curing such a prepreg sheet has a general property that the color changes to milky white when stress is applied due to the characteristics of the resin contained therein.

  The anchor bolt 3 is firmly fixed to the concrete wall 2, but if the anchor bolt 3 is loosened due to various factors such as deterioration of the concrete wall 2 over time or occurrence of an earthquake, the anchor bolt 3 is fixed to the concrete wall 2. Relative movement in the removal direction D At this time, since the washer 4 and the anchor bolt 3 are also relatively moved together, a stress is applied to the fiber reinforced plastic member 5 integrated with both the washer 4 and the concrete wall 2, and as a result, the fiber reinforced plastic. The member 5 changes color to milky white. In particular, since such an anchor bolt 3 is normally fixedly supported by a heavy object such as a lighting fixture, a large load is always applied to the anchor bolt 3, and when the anchor bolt 3 is loosened, a fiber reinforced plastic is used. Sufficient stress is generated to discolor the member 5.

  Therefore, by visually confirming the color state of the fiber reinforced plastic member 5, it is possible to easily detect the occurrence of loosening (relative movement / abnormality) of the anchor bolt 3. Further, even if the anchor bolt 3 moves relative to the concrete wall 2 and then returns to the original position, the color state of the fiber reinforced plastic member 5 that has been discolored once does not return to its original state. Even when the anchor bolt 3 returns to the normal position with respect to the concrete wall 2, it is possible to detect whether or not the anchor bolt 3 has loosened by confirming whether or not the color of the fiber reinforced plastic member 5 has changed. In addition, since the fiber reinforced plastic member 5 is configured to include a fibrous reinforcing material, the anchor bolt 3 can be supported even when an abnormality such as loosening occurs in the anchor bolt 3. 3 can be prevented from falling off immediately. Furthermore, the color change of the fiber reinforced plastic member 5 occurs when the anchor bolt 3 moves relative to the concrete wall 2, but when the anchor bolt 3 and the concrete wall 2 move together, that is, together with the anchor bolt 3. When the entire concrete wall 2 is shaken, the color change of the fiber reinforced plastic member 5 does not occur, so that the occurrence of erroneous detection can be avoided.

  Such a fiber reinforced plastic member 5 is installed as follows. First, the washer 4 is attached to the anchor bolt 3 previously planted in the concrete wall 2 as described above. Next, as shown in FIG. 3A, the tip of the anchor bolt 3 is covered with a protective cap 7. At this time, the base end of the protective cap 7 is kept in contact with the surface 42 of the washer 4. Next, the protective cap 7 is inserted into the opening 81 of the prepreg sheet 8 prepared in advance, and the surface 42 of the washer 4 and a part of the concrete surface 21 are covered with the prepreg sheet 8 as shown in FIG. . As the prepreg sheet 8, a transparent or translucent sheet using a glass cloth and a visible light curable resin as described above is used. Then, the prepreg sheet 8 is cured by irradiating visible light while pressing the prepreg sheet 8 against the concrete surface 21 and the surface 42 of the washer 4 using a pasting device (not shown). Thereby, the fiber reinforced plastic member 5 integrated with the concrete surface 21 and the surface 42 of the washer 4 is obtained. Thereafter, the protective cap 7 is removed, and the nut 6 is screwed onto the anchor bolt 3.

  In the present embodiment, the anchor bolt 3 and the washer 4 constitute a second member, and the surface 42 of the washer 4 constitutes a second surface.

  As described above, according to the structure 1 according to the present embodiment, when the anchor bolt 3 moves relative to the concrete wall 2 together with the washer 4, stress is applied to the fiber reinforced plastic member 5, and the fiber reinforced plastic member 5 is discolored. To do. Therefore, the inspector can confirm whether or not an abnormality has occurred in the anchor bolt 3 based on the color state of the fiber-reinforced plastic member 5 without using conventional proximity visual inspection, hammering sound, or palpation.

[Second Embodiment]
Next, the structure concerning 2nd Embodiment of this invention is demonstrated. In addition, the substantially same member as the thing in 1st Embodiment mentioned above is attached | subjected the same reference number, and the description is abbreviate | omitted.

  Referring to FIG. 4, structure 101 according to the present embodiment includes a plurality of anchor bolts 3 (three in the example of FIG. 4) planted on concrete wall 2, and each of the plurality of anchor bolts 3. The plurality of washers 4, the plurality of fiber reinforced plastic members 5, and the plurality of nuts 6 are provided. The structure 101 further includes a detection circuit 9, and the detection circuit 9 includes a plurality (three in the example of FIG. 4) of circuit portions 10 corresponding to the plurality of fiber reinforced plastic members 5, respectively. In the following, the left side in FIG. 4 is defined as the upstream side (one end side), and the right side is defined as the downstream side (the other end side).

  Each circuit unit 10 includes a first detection lead L1 and a second detection lead L2 integrated with the fiber reinforced plastic member 5. The first lead wire L1 for detection and the second lead wire L2 for detection are arranged across the fiber reinforced plastic member 5 so that both end portions extend from both ends of the fiber reinforced plastic member 5, and The intermediate portion is disposed so as to straddle over the concrete surface 21 and the surface 42 of the washer 4. A fine lead wire is used as the first lead wire L1 for detection, and the first lead wire L1 is configured to be disconnected even with a relatively small stress. On the other hand, a lead wire having a diameter larger than that of the first lead wire for detection L1 is used for the second lead wire for detection L2. ing.

  Each circuit unit 10 includes a first terminal block 11 and a second terminal twelfth. In the circuit portion 10A on the most upstream side, the upstream end portion of the first detection lead wire L1 is electrically connected to the first connection lead wire L3 via the first terminal block 11, and the second detection lead wire The upstream end of L2 is electrically connected to the second connecting lead L4 via the second terminal block 12. In the most downstream circuit portion 10C, the downstream end portion of the first detection lead L1 is electrically connected to the third connection lead L5 via the second terminal block 12 to detect the second detection lead L5. The downstream end of the lead wire L2 is electrically connected to the connection fourth lead wire L6 via the second terminal block 12. Between the two adjacent circuit portions 10 and 10, the second terminal block 12 and the first terminal block 11 are electrically connected by a pair of connecting lead wires L7 and L8, and as a result, the detection first lead wire L1. , L1 and the detection second lead wires L2 and L2 are electrically connected via connecting lead wires L7 and L8.

  Further, each circuit unit 10 includes a pilot lamp as a pair of notification means provided between the first lead wire L1 for detection and the second lead wire L2 for detection on the upstream side and the downstream side of the fiber reinforced plastic member 5. (Light emitting means) PL and PL are provided, and a monitoring pilot lamp MP is provided in the first connecting lead L3. That is, all the pilot lamps PL are connected in parallel, and all the first detection lead wires L1 and the monitoring pilot lamps MP are arranged in series. In the following description, these pilot lamps PL are particularly referred to as pilot lamps PLa, PLb, PLc, PLd, PLe, and PLf in order from the upstream side.

  Here, the upstream end portions of the connecting first lead wire L3 and the connecting second lead wire L4 are respectively “A” and “A ′”, and the connecting third lead wire L5 and the connecting fourth lead wire L6 are connected to each other. When the downstream end portions are “B” and “B ′”, respectively, when a voltage is applied between A and B using a power supply means (not shown), the monitoring pilot lamp MP is turned on. When a voltage is applied between A and A ', all pilot lamps PL are lit, and even when a voltage is applied between B and B', all pilot lamps PL are lit. Therefore, normally, a voltage is applied between A and B, and the monitoring pilot lamp MP is always lit.

  In such a configuration, when any of the anchor bolts 3 moves relative to the concrete wall 2, stress is applied to the corresponding fiber reinforced plastic member 5 as described above, and the fiber reinforced plastic member 5 is discolored. Further, when stress is applied to the fiber reinforced plastic member 5 in this way, the stress is similarly applied to the first detection lead L1 integrated with the fiber reinforced plastic member 5, and the first detection lead L1 is disconnected. To do. When one of the detection first lead wires L1 is disconnected in this way, the monitoring pilot lamp MP is extinguished, and the monitoring person breaks the detection first lead wire L1, that is, the anchor bolt 3 is loosened (abnormal). Can know.

  However, it is not possible to specify which anchor bolt 3 has loosened only by turning off the monitoring pilot lamp MP. Therefore, when the monitoring pilot lamp MP is turned off, the anchor bolt 3 in question is specified as follows.

  First, a voltage is applied between A and A '. As a result, only the pilot lamp PLa is turned on, and if the downstream pilot lamps PLb to PLf are not turned on, an abnormality has occurred in the anchor bolt 3 on the most upstream side, that is, the circuit part 10A on the most upstream side. It can be seen that the first lead wire L1 for detection in FIG. Next, a voltage is applied between B and B '. As a result, if the pilot lamp PLa is not lit and all the pilot lamps PLb to PLf on the downstream side are lit, it can be understood that the anchor bolt 3 in question is only the most upstream anchor bolt 3.

  As a result of applying a voltage between A and A ′, only the pilot lamp PLf is lit, and if any of the upstream pilot lamps PLa to PLe is not lit, the problematic anchor bolt is the most downstream side. The anchor bolt 3 can be identified.

  On the other hand, as a result of applying a voltage between A and A ′, only the pilot lamp PLa is turned on, and then when only a pilot lamp PLf is turned on as a result of applying a voltage between BB and B ′, the most upstream anchor Although it can be determined that there is an abnormality in the bolt 3 and the anchor bolt 3 on the most downstream side, it cannot be determined whether or not an abnormality has occurred in the anchor bolt 3 located in the middle. In this case, as shown in FIG. 5, in place of the disconnected detection first lead L1 (in the example of FIG. 5, the most upstream detection first lead L1), a separately prepared alternative lead Ls Is connected to the first and second terminal blocks 11 and 12 and a voltage is applied again between A and A ′. As a result, if the pilot lamps PLc to PLe are lit, it means that there is no abnormality in the anchor bolt 3 located in the middle. If the pilot lamps PLd, PLe are not lit, the anchor bolt 3 located in the middle is abnormal. Means there is.

  Therefore, when the occurrence of an abnormality in the anchor bolt 3 is detected in this way, it is possible to immediately identify the anchor bolt 3 in which an abnormality has occurred and repair or replace it. Alternatively, since the fiber reinforced plastic member 5 is transparent or translucent, the state of the first lead wire L1 for detection and the second lead wire L2 for detection can be visually confirmed through the fiber reinforced plastic member 5 and is broken. It can be confirmed whether only the first lead wire L1 for detection is present or both the first lead wire L1 for detection and the second lead wire L2 for detection. Therefore, for example, when only the first lead L1 for detection is disconnected, the follow-up observation is strengthened while paying attention to the abnormality of the anchor bolt 3, and the second lead L2 for detection is also disconnected. If it is, measures corresponding to the degree of abnormality can be taken, such as repairing / replacement of the anchor bolt 3 immediately. Furthermore, the state of occurrence of cracks in the concrete wall 2 that supports the anchor bolt 3 can also be confirmed through the fiber reinforced plastic member 5.

  The first and second lead wires L1, L2 for detection described above are integrated with the fiber reinforced plastic member 5 as follows. That is, as described above, after the prepreg sheet 8 (FIG. 3A) is disposed in contact with the surface 42 and the concrete surface 21 of the washer 4, the first lead wire L1 for detection and the second lead L2 for detection are placed. The prepreg sheet 8 is arranged so as to lie over it. Thereafter, by curing the prepreg sheet 8, the fiber reinforced plastic member 5 integrated with the first detection lead L1 and the second detection lead L2 is obtained.

  Thus, according to the present embodiment, the occurrence of an abnormality in the anchor bolt 3 based on the lighting state of the monitoring pilot lamp MP without visually confirming whether the individual fiber reinforced plastic members 5 are discolored or not. The presence or absence of can be detected. Therefore, even if it is difficult to visually check the anchor bolt 3 on a daily basis, such as an anchor bolt attached to a ceiling portion of a highway tunnel, for example, the abnormality of the anchor bolt 3 can be easily detected. Occurrence can be detected.

  In addition, since the anchor bolt in which an abnormality has occurred can be identified based on the lighting state of the detection pilot lamp PL when a voltage is applied between A-A 'and B-B', for example, a large number of long-distance Even when the anchor bolts are arranged, it is possible to easily identify the abnormal anchor bolt.

  The strength of the first lead L1 for detection is set to be smaller than the strength of the fiber reinforced plastic member 5, and is more than the peel strength between the fiber reinforced plastic member 5, the concrete surface 21, and the surface 42 of the washer 4. Set it small. Thereby, the abnormality of the anchor bolt 3 can be detected before the anchor bolt 3 completely falls out of the concrete wall 2.

[Third Embodiment]
Next, a structure 201 according to a third embodiment of the present invention will be described with reference to FIG. The structure according to the present embodiment is substantially the same as the structure 101 according to the second embodiment described above. However, in the detection circuit 209 included in the structure 201, the connection second lead wire L4 is also connected to the monitoring pilot. The difference is that a lamp MP ′ is provided. As described above, since the second lead wire for detection L2 has a larger diameter than the first lead wire for detection L1, only a small amount of stress breaks only the first lead wire for detection L1 and is larger. When the stress is generated, in addition to the first detection lead L1, the second detection lead L2 is also disconnected. Normally, the monitoring pilot lamp MP is always turned on by applying a voltage between AA ′, and when the monitoring pilot lamp MP is turned off, the voltage is applied between BB ′. As a result, when the monitoring pilot lamp MP ′ is lit, it is possible to detect that only one of the detection first lead wires L1 is disconnected, that is, that a slight abnormality has occurred in any of the anchor bolts 3, In this case, what is necessary is just to strengthen follow-up observation, paying attention to the abnormality of the anchor bolt 3. On the other hand, if the monitoring pilot lamp MP ′ is not lit, a stress has been generated in the fiber reinforced plastic member 5 so as to break the second lead L2 for detection, that is, a serious abnormality has occurred in the anchor bolt 3. In this case, the anchor bolt 3 may be immediately repaired / replaced, and measures according to the degree of abnormality can be taken.

  In addition, in order to be able to detect abnormality of the anchor bolt 3 before the anchor bolt 3 completely falls out of the concrete wall 2, the strength of the first lead wire L1 for detection and the strength of the second lead wire L2 for detection are both fibers. The strength is set smaller than the strength of the reinforced plastic member 5, and is set smaller than the peel strength between the fiber reinforced plastic member 5, the concrete surface 21 and the surface 42 of the washer 4.

[Fourth Embodiment]
Next, a structure according to a fourth embodiment of the present invention will be described with reference to FIG. A structure 301 illustrated in FIG. 7 has substantially the same configuration as the structure 101 according to the second embodiment described above, but differs in that a detection circuit 309 is provided instead of the detection circuit 9. The detection circuit 309 includes a first detection lead L1 that is installed across a plurality of fiber reinforced plastic members 5, and a monitoring pilot lamp MP provided on the detection lead L1. ing. In the structure 301 configured in this manner, a voltage is applied between A and B so that the monitoring pilot lamp MP is always turned on, and when the monitoring pilot lamp MP is turned off, there is a visual problem. The anchor bolt 3 may be specified. With such a configuration, the configuration of the detection circuit 309 can be simplified, and the detection circuit 309 can be easily installed. Note that this configuration can be suitably applied to cases where it is easy to identify the anchor bolt 3 that causes a problem without depending on the pilot lamp PL, such as when the number of anchor bolts 3 is small.

[Fifth Embodiment]
Next, a structure according to a fifth embodiment of the present invention will be described with reference to FIG. The structure 401 shown in FIG. 8 includes a retaining wall W1, a retaining wall W2 installed adjacent to the retaining wall W1, a pair of surfaces provided on the surface W11 of the retaining wall W1 and the surface W21 of the retaining wall W2. Fiber reinforced plastic members 5 and 5 and a detection circuit 409 are provided. The detection circuit 409 spans between the pair of fiber reinforced plastic members 5, 5, the detection first lead L 1 integrated with the pair of fiber reinforced plastic members 5, 5, and the detection circuit And a monitoring pilot lamp MP provided on the first lead wire L1.

  In this configuration, when the retaining wall W2 moves relative to the retaining wall W1, the first detection lead wire installed so as to be spanned between the pair of fiber reinforced plastic members 5 and 5. L1 is disconnected, and the monitoring pilot lamp MP is turned off. The first lead L1 for detection may be spanned between the fiber reinforced plastic members 5 and 5 with a slight looseness (for example, about 3 cm). If comprised in this way, the 1st lead wire L1 for a detection will disconnect only when the relative movement of the retaining wall W2 with respect to the retaining wall W1 exceeds the allowance.

  Here, the fiber reinforced plastic members 5 and 5 function as a fixing means for fixing the first lead wire L1 for detection to the retaining walls W1 and W2. However, the fixing means is not limited to the fiber reinforced plastic members 5 and 5. It is also possible to use other members such as anchor bolts.

  The structure according to the embodiment of the present invention has been described above with reference to the accompanying drawings. However, the present invention is not limited to the embodiment, and various modifications and corrections can be made without departing from the scope of the present invention. It is.

  For example, in the first to fourth embodiments, the generation of distortion in the anchor bolt 3 planted on the concrete wall 2 as the first member has been described as an example. However, the present invention is limited to such a form. Instead, it may display (detect) the occurrence of misalignment of other wall materials and pillar materials arranged at predetermined positions with respect to the first member such as the concrete wall 2. Also in such a case, as shown in FIGS. 9A and 9B, from the surfaces J21 and J21 ′ of the first members J and J ′ to other members K and K ′ (other wall materials and columns). The fiber reinforced plastic member 5 may be disposed over the surfaces K22, K22 ′ of the material.

  In the second and third embodiments, a fine lead wire is used for the detection first lead wire L1, and the lead wire having a larger diameter than the detection first lead wire L1 is used for the detection second lead wire L2. However, depending on the required detection accuracy, fine lead wires may be used for both the first detection lead L1 and the second detection lead L2, or the first detection lead L1 and A large-diameter lead wire may be used for both of the detection second lead wires L2. Also, the strength (thickness) of each lead wire can be variously selected in accordance with individual situations.

  Further, in the first and second embodiments, the monitoring pilot lamps MP and MP ′ are installed only in the first connecting lead L3 and / or the second connecting lead L4. However, instead of this, In addition, monitoring pilot lamps MP and MP ′ may be installed on the third connecting lead L5, the fourth connecting lead L6, and / or the connecting lead wires L7 and L8.

  In the second and third embodiments described above, the case where the detection circuits 9 and 209 include the three circuit units 10 corresponding to the three anchor bolts 3 has been described as an example, but one, two, Alternatively, the number of circuit portions 10 may be one, two, or four or more in correspondence with four or more anchor bolts 3. Similarly, in the fourth embodiment described above, the number of anchor bolts 3 is not limited to three.

  Furthermore, the structure in the present invention is not limited to the above-described tunnels and retaining walls, and includes various concrete structures such as bridges, high-rise buildings, dams, steel structures, steel structures, earth structures, etc. The fiber reinforced plastic member 5 and / or the detection circuit 9 (209, 309, 409) may be provided so as to be bridged from the falling bridge prevention device to the pier and / or the bridge.

  Moreover, although the structure in each said embodiment was comprised so that detection of generation | occurrence | production of the relative movement of the other member with respect to the member which comprises a structure was comprised, you may be comprised so that detection of collapse of a structure, etc. can be detected. For example, the road structure 501 shown in FIG. 10 includes a retaining wall W3 provided on a slope and an asphalt road (structural member) R provided on the upper portion of the retaining wall W3. The asphalt road R is a drain side ditch DR. Is divided into a sidewalk portion R1 and a roadway portion R2. In such a road structure 501, there is a possibility that the retaining wall W3 collapses. However, when the retaining wall W3 collapses, usually a part of the asphalt road R provided on the upper side also collapses together with the retaining wall W3. . Also, as a sign of such collapse, the road surface is cracked. Therefore, the fiber reinforced plastic member 5 is provided integrally with the road surface at a plurality of locations on the road surface, and the detection circuit 209 as described above is provided.

  In the road structure 501 configured as described above, when a relatively large crack is generated on the road surface of the asphalt road R as a sign of collapse, the first lead L1 for detection and the detection are detected via the fiber reinforced plastic member 5. Stress is applied to the second lead wire L2, and the first lead wire L1 for detection and / or the second lead wire L2 for detection is disconnected. As a result, the monitoring pilot lamp MP and / or MP ′ is turned off, and an abnormality in the road structure 501 (a road surface breakage, a sign of collapse of the retaining wall W3) can be detected. In the example shown in FIG. 10, it goes without saying that the detection circuit 9 or the detection circuit 309 can be used instead of the detection circuit 209.

  It is also possible to provide only the fiber reinforced plastic member 5 at a plurality of locations on the road surface and omit the detection circuit. In this case, what is necessary is just to confirm the color state of the fiber reinforced plastic member 5 visually.

  In each of the above embodiments, the fiber reinforced plastic member 5 and the detection circuit 9 (209, 309, 409) constitute a detection system.

  In the above embodiment, the light emitting means (pilot lamp PL, monitoring pilot) is used as a notification means for notifying the disconnection of the first lead wire L1 for detection and / or the second lead wire L2 for detection (hereinafter simply referred to as “lead wire”). The lamp MP, MP ′) is used to notify the disconnection of the lead wire by turning off the light emitting means when the lead wire is disconnected. However, the light emitting means is always turned off and the lead wire is disconnected ( When the power supply via the lead wire is interrupted), the light emitting means is turned on to notify the disconnection of the lead wire. Further, the notifying means is not limited to the light emitting means, and may be, for example, a sound generating means for generating a notification sound when the lead wire is disconnected, or a signal notifying the disconnection of the lead wire when the lead wire is disconnected. May be a transmission means for transmitting to the reception means such as a portable terminal or a server terminal. By using the transmission means as the notification means, the administrator can know the occurrence of an abnormality in the structure while in a remote place.

1, 101, 201, 301, 401, 501 Structure 2 Concrete wall (first member)
3 anchor bolt 5 fiber reinforced plastic member 6 washer 7 protective cap 8 prepreg sheet 9, 209, 309, 409 detection circuit 10 circuit part 21 concrete surface L1 first lead wire L2 for detection second lead wire PL for detection pilot lamp MP, MP 'monitoring pilot lamp

Claims (9)

A first member constituting the structure;
A second member;
A fiber reinforced plastic member,
The second member includes a bolt member implanted in the first member so as to protrude from the surface of the first member, and a washer member attached to the bolt member,
The fiber reinforced plastic member is integrated with the surface of the first member and the surface of the washer member ,
When the second member is moved relative to the first member, the fiber-reinforced plastic member is discolored by a stress generated in the fiber-reinforced plastic member, so that the second member is relative to the first member. A structure characterized in that it can detect the occurrence of movement. And concrete wall as the first member constituting the structure,
The other wall material or column material as the second member that is fixedly disposed at a predetermined position relative to the first member,
A fiber reinforced plastic member integrated with the surface of the concrete wall and the surface of the other wall material or pillar material ,
When the other wall material or column material against the concrete wall is relatively moved, by the fiber-reinforced plastic member is discolored by the stress generated in the fiber reinforced plastic member, said other wall with respect to the concrete wall A structure that is configured to detect relative movement of a material or a column . A detection circuit, the detection circuit including a lead wire integrated with the fiber reinforced plastic member, and a notification unit; the lead wire from the surface of the concrete wall to the other wall material or pillar material; Arranged so as to straddle the surface of
When the other wall material or column material moves relative to the concrete wall, the lead wire is disconnected, according to claim 2 wherein said informing means is characterized by notifying the disconnection of the lead wire Structure. A first member constituting the structure;
A second member fixedly disposed at a predetermined position with respect to the first member;
A fiber reinforced plastic member integrated with the first surface of the first member and the second surface of the second member;
A detection circuit,
The detection circuit includes a lead wire integrated with the fiber reinforced plastic member, and an informing means,
The lead wire is disposed so as to straddle the second surface from the first surface,
When the second member moves relative to the first member, the lead wire is disconnected, and the notification means notifies the disconnection of the lead wire ,
A plurality of the second members are provided, a plurality of the fiber reinforced plastic members, the notification means, and the lead wires are provided corresponding to the plurality of second members, and the plurality of notification means are connected in parallel. structure, characterized in that there.   The detection circuit further includes another notification means electrically connected to the lead wire, and the plurality of lead wires and the other notification means are connected in series. The structure described. A first member constituting the structure;
A second member;
A fiber reinforced plastic member;
A detection circuit,
The second member includes a bolt member implanted in the first member so as to protrude from the surface of the first member, and a washer member attached to the bolt member,
The fiber reinforced plastic member is integrated with the surface of the first member and the surface of the washer member,
The detection circuit includes a lead wire integrated with the fiber reinforced plastic member, and an informing means,
The lead wire is disposed so as to straddle the surface of the washer member from the surface of the first member ,
When the second member moves relative to the first member, the lead wire is disconnected, and the notification means notifies the disconnection of the lead wire. A first member constituting the structure;
A second member fixedly disposed at a predetermined position with respect to the first member;
A fiber reinforced plastic member integrated with the first surface of the first member and the second surface of the second member;
A detection circuit,
The detection circuit includes a first lead wire and a second lead wire integrated with the fiber reinforced plastic member, and an informing means,
The first lead wire and the second lead wire are arranged so as to straddle the second surface from the first surface,
The second lead wire is thicker than the first lead wire,
When the second member moves relative to the first member and stress is applied to the first lead wire and the second lead wire, the first lead wire is disconnected, and the notifying means is configured to transmit the first lead wire . Notify the lead wire breakage ,
A structure in which the first lead wire and the second lead wire are disconnected when a greater stress is applied to the first lead wire and the second lead wire .   A relative movement detection method for detecting the presence or absence of movement of the second member relative to the first member constituting the structure,
  Arranging the prepreg sheet so as to straddle the first surface of the first member and the second surface of the second member;
  A step of rolling a lead wire on the prepreg sheet so as to straddle the second surface from the first surface;
  Curing the prepreg sheet to obtain a fiber reinforced plastic member integrated with the first member, the second member, and the lead wire,
  When the second member moves relative to the first member, the lead wire is disconnected, and the notification means notifies the disconnection of the lead wire. A method of detecting a sign of collapse of the retaining wall in a road building comprising a retaining wall and an asphalt road provided on the upper part of the retaining wall using a detection circuit,
The road surface of the asphalt road is provided with a fiber reinforced plastic member integrated with the road surface ,
The detection circuit includes a lead wire integrated with the fiber reinforced plastic member, and an informing means for informing the disconnection of the lead wire ,
Retaining said notifying means the lead wire and cracked the road is disconnected notifies the disconnection of the lead wire, and detecting a collapse sign of the retaining wall on the basis of the notification from the notification means Wall fall sign detection method .

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