JP7007124B2 - Deformity detection device - Google Patents

Description

The present invention relates to a deformation detection device that detects a change in the positional relationship between two regions such as a displacement generated in a structure or a ground.

As disclosed in Patent Document 1, it is known to arrange a device for measuring the behavior of the ground surface on a slope where landslides and slope failures are likely to occur. Patent Document 1 discloses a method in which reflectors are installed at a plurality of locations on a slope where fluctuations are expected, and the positions of the reflectors are measured by a high-precision electronic range-finding / goniometer.

On the other hand, Patent Document 2 discloses a dimming sheet and a dimming plate capable of switching the display of an incident light amount, a pattern, and the like by changing the polarization state or the phase state of the transmitted light.

Japanese Unexamined Patent Publication No. 5-71960 Japanese Unexamined Patent Publication No. 2016-224454

However, in the method of measuring by the electronic range-finding / goniometer disclosed in Patent Document 1, it cannot be confirmed that the deformation has occurred until the measurement and analysis are performed, and measures such as implementation of countermeasure construction and evacuation are taken. May be delayed.

Therefore, an object of the present invention is to provide a deformation detecting device capable of easily visually confirming a deformation generated in a structure or a ground.

In order to achieve the above object, the deformation detection device of the present invention is a deformation detection device that detects a change in the positional relationship between two regions, and has a first main body portion fixed to the first region. A second main body portion fixed to the second region and a detection unit in which a part of the first main body portion and a part of the second main body portion overlap each other are provided, and the detection unit is located between the two regions. It is characterized in that the display state changes depending on the positional relationship of.

Here, the detection unit can be configured to have a fine adjustment means for finely adjusting the overlapping state of the first main body and the second main body. Further, the detection unit may be provided with a stopper unit that limits fluctuations of a predetermined value or more.

Further, the detection unit can be configured such that the display state changes depending on the positional relationship in one direction in the overlapping planes. Further, the detection unit may have a configuration in which the display state changes depending on the positional relationship in any direction in the overlapping planes. Further, the detection unit may be configured such that the display state changes depending on the positional relationship in the overlapping out-of-plane directions.

In the deformation detection device of the present invention configured as described above, when a change in the positional relationship occurs between two regions sandwiching a crack or a crack, the display state of the detection unit changes from the initial state. Therefore, it is possible to easily visually confirm the deformation generated in the structure or the ground without performing a separate measurement such as surveying.

Further, if the detection unit has a fine adjustment means for finely adjusting the overlapping state of the first main body and the second main body, it can be easily set to the initial display state. Further, even after the deformation is detected, it is possible to reset by operating the fine adjustment means and detect the deformation again.

Further, if the detection unit has a stopper unit that limits fluctuations of a predetermined value or more, it is possible to prevent the fluctuations from becoming too large and becoming the same state as the display state when the fluctuations are small. ..

Then, with such a deformation detecting device, it is possible to detect a change in the positional relationship in one direction, a plurality of in-plane directions, or an out-of-plane direction.

It is a perspective view which showed the state which installed the deformation detection apparatus of embodiment of this invention. It is a figure explaining the structure of the deformation detection apparatus of embodiment of this invention, (a) is the perspective view which showed the disassembled state, (b) is the perspective view which showed the state at the time of installation, (c). ) Is a perspective view showing the state at the time of detecting the deformation. It is a figure which showed the slope where the deformation detection device of Example 1 was installed, (a) is the explanatory view when the crack occurred in the lower part of the slope, (b) is the case where the crack occurred in the upper part of the slope. It is explanatory drawing. It is a perspective view which showed the state which installed the deformation detection apparatus of Example 1. FIG. It is a figure explaining the structure of the deformation detection apparatus of Example 1, (a) is the perspective view which showed the disassembled state, (b) is the perspective view which showed the state at the time of installation, (c) is change. It is a perspective view which showed the state at the time of state detection. It is a perspective view explaining the process of installing the deformation detection apparatus of Example 1. FIG. It is a figure explaining the structure of the deformation detection apparatus of Example 2, (a) is the perspective view which showed the disassembled state, (b) is the perspective view which showed the state at the time of installation, (c) is change. It is a perspective view which showed the state at the time of state detection. It is a perspective view explaining the state which detected the displacement in another direction by the deformation detection apparatus of Example 2. FIG. It is a figure explaining the structure of the deformation detection apparatus of Example 3, (a) is the perspective view which showed the disassembled state, (b) is the perspective view which showed the state at the time of installation, (c) is change. It is a perspective view which showed the state at the time of state detection.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the deformation detection device 1 of the present embodiment is installed in the concrete structure C.

For example, a concrete structure C constructed of reinforced concrete, prestressed concrete, or the like may deteriorate due to the usage environment or long-term use, and crack C3 may occur.

There is no problem if the crack C3 has a narrow width such as a hair crack, but if it progresses due to a wide width or the like, it may affect the function and life of the structure. Therefore, by installing the deformation detection device 1 at the stage when the small crack C3 is found, it becomes possible to easily detect the subsequent deformation. Here, the deformation detection target is not limited to the concrete structure C, and may be a retaining wall of masonry or the like.

Then, one region sandwiching the crack C3 of the concrete structure C is referred to as a first region C1, and the other region is referred to as a second region C2. The deformation detection device 1 of the present embodiment has a first main body portion 11 fixed to the first region C1, a second main body portion 12 fixed to the second region C2, and a part of the first main body portion 11. It is mainly composed of a detection unit 13 in which a part of the second main body unit 12 and a part of the second main body unit 12 overlap each other.

In the deformation detection device 1 described in the present embodiment, changes in the positional relationship in one direction are detected. Here, it is decided to detect the expansion of the width of the crack C3, and the deformation detection device 1 is attached in a direction substantially orthogonal to the extension direction of the crack C3.

Subsequently, the detailed configuration of the deformation detection device 1 will be described with reference to FIG. 2. The first main body portion 11 is formed in a substantially rectangular shape in a plan view in which one direction is the longitudinal direction. The first main body portion 11 is formed of, for example, glass or a transparent resin material.

A hole 112 for fixing to the first region C1 of the concrete structure C is drilled in the vicinity of the end portion in the longitudinal direction of the first main body portion 11 by a fixing means such as a fixing screw 111. Further, slide grooves 113, 113 for slidably guiding the second main body portion 12 are extended in the longitudinal direction on both side edges in the lateral direction.

On the other hand, the second main body portion 12 is also formed in a substantially rectangular shape in a plan view in which one direction is the longitudinal direction. The second main body portion 12 is formed of, for example, glass or a transparent resin material.

Further, a hole 122 for fixing to the second region C2 of the concrete structure C is drilled in the vicinity of the end portion in the longitudinal direction of the second main body portion 12 by a fixing means such as a fixing screw 121.

Then, on the surface of the first main body portion 11, a first pattern 131 that becomes a detection unit 13 by being overlapped with the second main body portion 12 is provided. Here, the detection unit 13 is configured by superimposing the second pattern 132 provided on the second main body unit 12 on the first pattern 131.

The detection unit 13 has a configuration in which the display state changes depending on the positional relationship between the first pattern 131 and the second pattern 132. That is, the first pattern 131 and the second pattern 132 superposed on the first pattern 131 are each provided with a band shape, a pattern, a hole, or the like at regular intervals such as a striped pattern at intervals of 5 mm.

Here, when the second pattern 132 is provided on the transparent material, as shown in FIG. 2B, if the patterns of the second pattern 132 and the first pattern 131 overlap, the striped pattern is displayed. Become a state.

In short, when starting the detection of the crack C3, as shown in FIG. 1, the first main body portion 11 is arranged so as to cross the crack C3 and is fixed to the first region C1 with the fixing screw 111. Subsequently, the second main body portion 12 is inserted into the slide grooves 113 and 113 of the first main body portion 11, and the second main body portion 12 is set to the second region by the fixing screw 121 at a position where the display state of the detection unit 13 becomes a striped pattern. Fix it to C2.

After that, the width of the crack C3 widens, and as shown in FIG. 2C, the second main body portion 12 slides 5 mm in the longitudinal direction, and the positional relationship between the second pattern 132 and the first pattern 131 changes. Then, the striped pattern of the first pattern 131 in the lower layer is fitted between the striped patterns of the second pattern 132, and the display state is such that the entire surface of the detection unit 13 is filled. That is, the display can be switched by changing the polarization state and the phase state of the transmitted light of the second pattern 132 and the first pattern 131 like the slide type dimming glass.

In addition, even if the displacement does not reach 5 mm and the display state does not look like the entire surface is filled, the display state changes if there is a displacement from the initial state, so deformation can be detected and stripes can be detected. Displacement can also be measured by measuring the overlapping width of patterns with a scale or the like.

The display state of the detection unit 13 as described above is only an example, and characters and marks such as "danger" and "need attention" can be displayed. Further, even if the second main body and the first main body are made of a material having low opacity or low translucency such as a metal plate, the first pattern and the second pattern are, for example, holes scattered in a dot shape. If so, different display states can be created depending on the positional relationship between the first pattern and the second pattern.

Next, the operation of the deformation detection device 1 of the present embodiment will be described.

In the deformation detection device 1 of the present embodiment configured in this way, when the positional relationship changes between the two regions (C1, C2) sandwiching the crack C3 of the concrete structure C, the detection unit 13 The display state changes from, for example, the initial striped pattern to black.

Therefore, the deformation of the crack C3 generated in the concrete structure C can be visually confirmed quickly and easily without separately performing a measurement such as a survey.

Further, since the display state of the detection unit 13 changes, even a person who does not have specialized knowledge can confirm the change. For example, by attaching a sign such as "Please contact me when the display state of the detection unit 13 of the deformation detection device 1 turns black", it is possible to respond quickly to the deformation. become.

Further, since the change in the detection unit 13 is a change in the display state that can be visually confirmed, it is possible to detect the change even if the change is away from the place where the change detection device 1 is installed. Further, when the detection unit 13 is in a direction that is difficult for the administrator to see, a mirror can be installed to reflect the detection unit 13 so that the display state of the detection unit 13 can be easily seen.

Further, if the deformation detection device 1 detects only the displacement in one direction, it is possible to detect only the displacement component in the direction in which the change is desired to be known, such as the width of the crack C3.

Hereinafter, a deformation detection device 2 having a form different from the deformation detection device 1 described in the above embodiment will be described with reference to FIGS. 3 to 6. The same or equivalent parts as those described in the above-described embodiment will be described using the same terms or the same reference numerals.

FIG. 3 is a diagram showing slopes S in which the deformation detection device 2 of the first embodiment is installed at a plurality of locations. This slope S is a slope where slope collapse may occur, and the slope measurement system 3 is installed from the upper part of the slope to the lower part of the slope with a portion where cracks may occur.

In this slope measurement system 3, a fixed pile 33 is installed at a place where the fluctuation of the upper part of the slope does not occur, and a moving pile 34 is installed at a place where the movement occurs when a crack occurs at the lower part of the slope. It is connected by an inverse line 31.

One end of the Invar wire 31 is fixed to the head of the fixed pile 33, and a weight 341 is attached to the other end so that a constant tension acts on the Invar wire 31 so that the Invar wire 31 hangs from the head of the moving pile 34. deep. With such a connecting structure, even if the position of the moving pile 34 moves, only the Invar line 31 is extended, and the position of the Invar line 31 to which the first main body portion 21 described later is fixed does not change. become.

In short, the side on which the fixed pile 33 is installed is the first region S1 with the cracked portions (S3 and S4) sandwiched between them, and by fixing to the Invar wire 31, the fixed pile 33 is fixed to the first region S1. On the other hand, the side where the moving pile 34 is installed is the second area S2.

Then, a plurality of wooden piles 32, ... Are installed between the fixed pile 33 and the moving pile 34 at intervals along the Invar line 31 so that the section where the deformation occurs can be detected. The deformation detection device 2 of the first embodiment is used to detect the deformation at the position of the wooden pile 32. If it is sufficient to detect the deformation at one place, only the fixed pile 33 and the moving pile 34 may be installed, and the deformation detecting device 2 may be attached to the head of the moving pile 34.

FIG. 4 shows a state in which the deformation detection device 2 is attached to the head of the wooden pile 32. As shown in FIG. 5, the deformation detection device 2 has a rectangular plate-shaped first main body portion 21, a rectangular plate-shaped second main body portion 22 longer than the first main body portion 21, and a second main body portion 22. It is mainly composed of a storage case 24 for accommodating the above, and a detection unit 23 in which a part of the first main body portion 21 and a part of the second main body portion 22 overlap each other.

As shown in FIG. 5A, the first main body portion 21 is suspended from the Invar wire 31 connected to the first region S1. In the center of the first main body portion 21, a striped pattern serving as the first pattern 231 is provided. Here, both ends of the first main body portion 21 in the longitudinal direction are referred to as end portions 211 and 211.

The second main body portion 22 is provided with a striped pattern forming the second pattern 232 in the center, and stopper portions 27, 27 protruding upward are provided on the ridges at both ends in the longitudinal direction.

Further, a fixing screw 25 for fixing to the wooden pile 32 is attached to the center of the bottom surface of the storage case 24. Guide grooves 241,241 are extended in the longitudinal direction on both side edges of the storage case 24 in the lateral direction.

The second main body 22 is slidably fitted into the guide grooves 241,241 of the storage case 24. In short, the second main body 22 is attached to the wooden pile 32 side together with the storage case 24, but the relative positional relationship between the second main body 22 and the storage case 24 in the longitudinal direction is the second main body 22. Can be fine-tuned by sliding the.

Specifically, as shown in FIG. 6, the accommodating case 24 is placed on the upper end surface of the wooden pile 32, and the accommodating case 24 is fixed to the head of the wooden pile 32 by screwing the fixing screw 25.

At this time, the first main body portion 21 fixed to the Invar wire 31 is arranged above the accommodation case 24. Therefore, the second main body portion 22 housed in the storage case 24 is slid and moved so that the first pattern 231 and the second pattern 232 are aligned so that the detection unit 23 is in the initial display state.

When the detection unit 23 is in the initial display state due to the alignment, the adjusting screw 261 is screwed into the hole 262 that is formed in the side wall of the housing case 24 and penetrates toward the inner space. When the tip of the adjusting screw 261 hits the side surface of the second main body portion 22, the position of the second main body portion 22 can be fixed to the accommodating case 24. That is, the fine adjustment means 26 is configured by the adjusting screw 261 and the hole 262 drilled in the housing case 24.

Here, when the second pattern 232 is provided on the transparent material, as shown in FIG. 5B, the patterns of the second pattern 232 and the first pattern 231 overlap each other to display a striped pattern. ..

Then, when a crack portion (S3, S4) is generated on the slope S and the wooden pile 32 moves, the second main body portion 22 moves in the longitudinal direction together with the storage case 24 as shown in FIG. 5 (c). The positional relationship between the second pattern 232 and the first pattern 231 will change.

The change in the positional relationship between the second pattern 232 and the first pattern 231 is such that when the striped pattern of the lower second pattern 232 is fitted between the striped patterns of the first pattern 231, the detection unit 23 It is possible to visually detect the deformation by displaying the entire surface as if it were filled.

However, when the deformation becomes larger than this, the patterns of the second pattern 232 and the first pattern 231 overlap again, and the display state of the same striped pattern as the initial state is obtained.

Therefore, when the display state is such that the entire surface of the detection unit 23 is filled, the end portion 211 of the first main body portion 21 comes into contact with the stopper portion 27 of the second main body portion 22, and the second main body portion 22 is further seconded. The relative displacement between the pattern 232 and the first pattern 231 is prevented from occurring. In short, by providing a stopper portion 27 that limits fluctuations of a predetermined value or more, the display state is prevented from returning.

FIG. 3 is a diagram for explaining the display state of the detection unit 23 of the deformation detection device 2 due to the difference in the deformation generation section. FIG. 3A shows a case where a crack portion S3 is generated in the lower part of the slope. At this time, the display state of the deformation detection device 2 at one location below the crack portion S3 becomes “black”, and the crack portion The display state of the two deformation detection devices 2 and 2 above S3 remains the "striped pattern" in the initial state. That is, since the first main body 21 fixed to the Invar wire 31 does not move even if a crack occurs, only the second main body 22 fixed to the wooden pile 32 below the crack portion S3 that moves due to the crack is displaced. Then, the display of the detection unit 23 becomes "black" (see FIG. 6).

On the other hand, FIG. 3B shows a case where a crack portion S4 is generated in the upper part of the slope. At this time, the display states of all the three deformation detection devices 2, 2 and 2 below the crack portion S4 are displayed. It becomes "black".

By installing a plurality of deformation detection devices 2, ... At intervals between the fixed pile 33 and the moving pile 34 in this way, the section where the deformation occurs on the slope S can be accurately and quickly performed. You will be able to grasp it.

Further, if the detection unit 23 has the fine adjustment means 26 for finely adjusting the overlapping state of the first main body portion 21 and the second main body portion 22, it can be easily set to the initial display state. Become.

That is, it is difficult to accurately align the wooden pile 32 driven into the ground with the first main body portion 21 suspended from the Invar line 31 above the wooden pile 32. However, if the relative positional relationship between the first pattern 231 and the second pattern 232 deviates even a little, the initial display state changes, and there is a risk of misidentification even though no deformation has occurred.

On the other hand, the overlapping state of the first main body 21 and the second main body 22 is finely adjusted only by sliding the second main body 22 in the storage case 24 fixed to the head of the wooden pile 32. If possible, the deformation detection device 2 can be efficiently installed. Further, even when the deformation is detected once and then reset to detect the subsequent deformation again, it can be easily performed by operating the fine adjustment means 26.

Further, if the detection unit 23 has a stopper unit 27 that limits fluctuations of a predetermined value or more, the fluctuations become too large, and the state is similar to the display state when the fluctuations are small, resulting in deformation. You can prevent it from being overlooked.

Since the other configurations and actions and effects of Example 1 are substantially the same as those of the above-described embodiment or other examples, the description thereof will be omitted.

Hereinafter, the deformation detection device 4 having a form different from the deformation detection devices 1 and 2 described in the above-described embodiment and the first embodiment will be described with reference to FIGS. 7 and 8. The same or equivalent parts as those described in the above-described embodiment or other Example 1 will be described using the same terms or the same reference numerals.

In the first embodiment and the first embodiment, the change in the positional relationship in one direction in the plane where the first main body portion 11 (21) and the second main body portion 12 (22) overlap is detected. Then, a deformation detecting device 4 capable of detecting a change in a positional relationship in a plurality of directions in a plane will be described.

As shown in FIG. 7, the deformation detection device 4 includes a first main body portion 41, a second main body portion 42 provided with a second pattern 432 wider than the first pattern 431 of the first main body portion 41, and a second main body portion 42. 1 Mainly composed of a detection unit 43 in which the first pattern 431 of the main body portion 41 and the second pattern 432 of the second main body portion 42 overlap each other.

The first main body portion 41 is a communication narrower than those connecting the first pattern 431 having a substantially square plan view, the wide end portion 411 fixed to the first region, and the first pattern 431 and the end portion 411. It is composed of a part 413.

That is, the first main body portion 41 has a shape confined at the position of the connecting portion 413. Further, the end portion 411 is perforated with a hole 412 for screwing the fixing screw 414.

On the other hand, the second main body portion 42 is formed in a rectangular shape in a plan view. The second main body portion 42 is provided along the outer peripheral edge of the second pattern 432, which is substantially square in plan view, the end portion 421 provided integrally with the second pattern 432 fixed to the second region, and the second pattern 432. It is composed of a stopper wall 44 that serves as a stopper portion.

The end 421 is perforated with a hole 422 for screwing the fixing screw 424. Further, the stopper wall 44 is provided with an opening 423 for passing the communication portion 413 of the first main body portion 41.

That is, the stopper wall 44 is formed in a substantially C-shape in a plan view, and is orthogonal to the first-direction wall 441, 441 that is orthogonal to the longitudinal direction of the deformation detection device 4 (the direction in which the ends 411 and 421 face each other) and the second wall that is orthogonal to the first-direction wall 441, 441. It is equipped with two-way walls 442 and 442.

The length of the connecting portion 413 is formed so that the first pattern 431 can come into contact with the first direction wall 441 facing the opening 423. On the other hand, the gap between the opening 423 and the connecting portion 413 is set to a width that allows the first pattern 431 to come into contact with the second direction wall 442.

With the deformation detection device 4 configured in this way, it is possible to detect changes in the positional relationship in at least two directions in the plane. FIG. 7B shows the initial display state of the checkered pattern of the detection unit 43 in which the first pattern 431 is arranged in the center of the second pattern 432.

Then, as shown in FIG. 7 (c), when the deformation detection device 4 is displaced in the longitudinal direction (direction parallel to the second direction wall 442), the display state of the detection unit 43 changes to display black. Will be. The movement in this direction stops at the position where the first pattern 431 contacts the first direction wall 441.

On the other hand, as shown in FIG. 8, even when the deformation detection device 4 is displaced in the lateral direction (direction parallel to the first direction wall 441), the display state of the detection unit 43 changes and is black. Will be displayed. The movement in this direction stops at the position where the first pattern 431 contacts the second direction wall 442.

Further, even when a deformation occurs in the plane in a direction other than the two orthogonal directions described above, the display state of the detection unit 43 changes from the checkered pattern in the initial state, so that the deformation has occurred. Can be easily grasped.

Since the other configurations and actions and effects of the second embodiment are substantially the same as those of the above-described embodiment or other embodiments, the description thereof will be omitted.

Hereinafter, the deformation detection device 5 having a form different from the deformation detection devices 1, 2 and 4 described in the above-described embodiment and Examples 1 and 2 will be described with reference to FIG. 9. The same or equivalent parts as those described in the above-described embodiment or other Examples 1 and 2 will be described using the same terms or the same reference numerals.

In the third embodiment, similarly to the deformation detection device 4 of the second embodiment, the deformation detection device 5 capable of detecting changes in the positional relationship in a plurality of directions in the plane will be described. The main difference between the two is the configuration of the stopper portion 54.

As shown in FIGS. 9A and 9B, the deformation detection device 5 is provided with a first main body 51 and a second pattern 532 wider than the first pattern 531 of the first main body 51. The main body 52 is mainly composed of a detection unit 53 in which the first pattern 531 of the first main body 51 and the second pattern 532 of the second main body 52 overlap each other.

The first main body portion 51 is formed in a rectangular shape in a plan view. The first main body portion 52 is composed of a first pattern 531 having a substantially square plan view, an end portion 511 fixed to the first region, and a connecting portion 513 connecting the first pattern 531 and the end portion 511. .. Further, the end portion 511 is perforated with a hole 512 for screwing the fixing screw 514.

On the other hand, the second main body portion 52 is formed into a rectangular shape in a plan view. The second main body portion 52 is composed of a second pattern 532 having a substantially square plan view, an end portion 521 integrally provided with the second pattern 432 fixed to the second region, and a stopper portion 54. Here, the end portion 521 is perforated with a hole 522 for screwing the fixing screw 524.

The stopper portion 54 is composed of a columnar protrusion 541 that protrudes upward in the center of the second pattern 532 and a circular hole portion 542 that is circularly drilled in the center of the first pattern 531.

With the deformation detection device 5 configured in this way, it is possible to detect changes in the positional relationship in any direction in the plane. FIG. 9B shows the initial display state of the checkered pattern of the detection unit 53 in which the first pattern 531 is arranged in the center of the second pattern 532.

Then, as shown in FIG. 9C, when the deformation detection device 5 is displaced, for example, in the longitudinal direction (the direction in which the ends 511, 521 are separated from each other), the display state of the detection unit 53 changes to black. Will be displayed. The movement in this direction stops at a position where the inner surface of the circular hole portion 542 comes into contact with the protrusion 541.

That is, in the deformation detection device 5, the display state of the detection unit 53 changes and the deformation is detected regardless of the displacement in any direction in the plane where the first main body portion 51 and the second main body portion 52 overlap. Displacement. Then, the relative movement stops at the position where the inner surface of the circular hole portion 542 comes into contact with the protrusion 541.

By providing the stopper portion 54 having a simple structure of the protrusion portion 541 and the circular hole portion 542 in this way, even if the detection unit 53 tries to fluctuate by a predetermined value or more in any direction in the plane, it is more than that. The relative displacement is limited and it is possible to prevent the deformation from being overlooked.

Since the other configurations and actions and effects of Example 3 are substantially the same as those of the above-described embodiment or other examples, the description thereof will be omitted.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments and examples, and the design changes to the extent that the gist of the present invention is not deviated. Is included in the present invention.

For example, in the above-described embodiments and embodiments, a case where a change in the positional relationship in a plane in which a part of the first main body portion and a part of the second main body portion overlap is detected by a change in the display state of the detection unit will be described. However, it is not limited to this. For example, when a detection unit is provided in which a part of the first main body portion and a part of the second main body portion are overlapped with each other, the second main body portion is tilted with respect to the first main body portion and displacement in the out-of-plane direction occurs. Even so, since the display state of the detection unit changes, it is possible to detect a deformation called tilt.

C Concrete structure C1 1st area (1st area)
C2 2nd area (2nd area)
1 Deformity detection device 11 1st main body 12 2nd main body 13 Detection S slope S1 1st area (1st area)
S2 2nd area (2nd area)
2 Deformity detection device 21 1st main body 22 2nd main body 23 Detection unit 26 Fine adjustment means 27 Stopper 4 Deformity detection device 41 1st main body 42 2nd main body 43 Detection unit 44 Stopper wall (stopper part)
5 Deformity detection device 51 1st main body 52 2nd main body 53 Detection 54 Stopper

Claims (2)

It is a deformation detection device that detects changes in the positional relationship between the two areas of the upper slope and the lower slope.
The fixed pile installed on the upper part of the slope and the moving pile installed on the lower part of the slope are connected by an Invar line that does not change the position even if the moving pile moves.
A plurality of first main body portions fixed to the area of the upper part of the slope by being fixed to the Invar line,
A pile installed between the fixed pile and the moving pile, or a plurality of second main body portions fixed to the area of the lower part of the slope by being fixed to the moving pile.
A plurality of detection units formed by overlapping a part of the first main body portion and a part of the second main body portion are provided.
The detection unit is a stopper unit that changes the display state by changing the positional relationship in one direction in the overlapping planes according to the positional relationship between the two regions , and limits the fluctuation by a predetermined value or more in the one direction. A deformation detection device characterized in that the return of the display state is prevented by having the . The deformation detection device according to claim 1, wherein the detection unit includes a fine adjustment means for finely adjusting the overlapping state of the first main body and the second main body.

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