JP6071844B2 - Confirmation device for confirming displacement of wall and confirmation method thereof - Google Patents

Description

  The present invention relates to a confirmation device capable of confirming displacement of a wall that partitions a first region and a second region in a structure.

  In a structure installed in the soil such as a tunnel, the wall may be displaced by the movement of a natural mountain after a wall separating the soil and the space is installed. When this displacement becomes large, the wall of the structure may be cracked or cracked, and may collapse. Therefore, when constructing a structure such as the tunnel, in order to ensure accurate excavation and work safety, the displacement of the wall separating the soil and the space in the structure, that is, the internal space in the structure. It is necessary to grasp the displacement.

  As a method for measuring the internal displacement in the structure, a plurality of measurement points are provided in the same cross section at a plurality of cross sections at positions away from the laser light source installed at the reference position, and the distance between the measurement points is highly accurate. Some are measured by a light wave distance measuring and angle measuring machine (hereinafter referred to as an optical measuring instrument) (see Patent Document 1).

JP-A-5-99670 JP 9-318352 A

  In the measurement method described in Patent Document 1, by collimating the measurement points with the optical measuring instrument, the position data of the collimated measurement points is captured in a three-dimensional coordinate system, and the distance between the measurement points and the The amount of displacement of the wall surface of the structure is obtained.

  Further, as a method for measuring the internal displacement different from the measurement method described in Patent Document 1, a plurality of transmission targets are provided in the same cross section at a plurality of cross sections at positions away from the laser light source installed at the reference position. There is a thing (refer patent document 2).

  In the measurement method described in Patent Document 2, a grid composed of horizontal rules and vertical rules is formed on the transmission target. And the said transmission target is attached to the wall surface of the said structure so that the optical axis of a laser beam may pass the initial position. When measuring the inner space displacement of the structure, the displacement of the position where the optical axis of the laser beam in the grid intersects the initial position of the transmission target is visually confirmed, and the amount of displacement of the wall surface of the structure is determined. Looking for.

  In the invention described in Patent Document 1 and Patent Document 2, a measurement person who measures the inner space displacement measures the inner space displacement, and then the measurement result obtained by the measurement is obtained in the structure. It is necessary to make a judgment based on the management standard value determined by the safety standard corresponding to the displacement amount of the wall surface, and then to transmit the displacement state of the wall in the structure to an operator working in the structure. is there. Therefore, there is a time lag from the measurement of the internal air displacement until the displacement state of the wall determined based on the management reference value obtained from the measurement result of the internal air displacement is transmitted to the operator.

  As a result, during the construction work of the structure, for example, the work until the information (caution, evacuation instruction, etc.) related to safety is transmitted to the worker after detecting the displacement of the wall that is judged to be dangerous. The worker is engaged in work on the site without knowing the dangerous situation, and there is a possibility that the safety of the worker is lowered.

  The present invention has been made in view of the above problems, and can confirm the displacement of the wall that partitions the soil and the space, and can provide safety information corresponding to the displacement state of the wall to the operator. It is an object of the present invention to provide a confirmation device for confirming wall displacement and a confirmation method thereof.

In order to solve the above-mentioned problem, the first region side of the wall that partitions the first region and the second region by receiving laser light irradiated in the direction set from the reference position in the first aspect of the present invention A confirmation device attached to the wall for confirming displacement from the second region side to a plurality of light receiving regions provided according to a distance from the wall, and a light receiving region receiving the laser light Display means for displaying information corresponding to the displacement of the wall in response to the detection signal, a plurality of light receivers for detecting wall displacement are arranged in each light receiving region, the display means And a plurality of display units respectively corresponding to detection signals from the respective light receiving regions, and each display unit displays the information when the laser beam is received by any one light receiver in the corresponding light receiving region. It is characterized by
Further, the confirmation device for confirming the displacement of the wall separating the first region and the second region by receiving the laser beam irradiated in the direction set from the reference position in the first aspect of the present invention is the wall. And a display means for displaying information corresponding to the displacement of the wall according to a detection signal from the light receiving area receiving the laser beam, and a plurality of light receiving areas provided according to the distance from the wall It is characterized by providing.

  According to this aspect, in any of the plurality of light receiving areas provided according to the distance from the wall in the confirmation device attached to the wall, the laser beam irradiated in the direction set from the reference position When light is received, information on safety corresponding to the displacement of the wall can be displayed on the display means in accordance with a detection signal from the light receiving region that has received the laser beam. In this aspect, for example, by receiving laser light from the reference position continuously or at an extremely short time interval in any one of the light receiving regions, information on safety corresponding to the displacement of the wall is displayed on the display means. You can continue. As a result, a worker working in the vicinity of the wall can know the current displacement of the wall without relying on a person in charge of measuring the internal displacement, and can continue working in a safe environment. .

  The confirmation device for confirming the displacement of the wall according to the second aspect of the present invention is characterized in that, in the first aspect, the display means displays information corresponding to the displacement of the wall according to the manner of light emission.

  According to this aspect, since the safety-related information corresponding to the displacement of the wall is displayed on the display means by way of light emission, a plurality of workers working in the vicinity of the wall can visually recognize the displacement state of the wall. Can inform about. As a result, information related to the safety can be shared among workers, and the response to the displacement of the wall can be speeded up. Therefore, the safety of the work environment in the vicinity of the wall can be improved.

  In addition, the light emission method in this aspect is not only lighting, blinking, and extinguishing of one light, but light emission, blinking, extinction of different colors in a plurality of lights, and the color of light emitted by one lamp such as an LED lamp. It may be anything that visually alerts the operator with light, including changing the color to a plurality of colors or blinking.

  The confirmation apparatus for confirming the displacement of the wall according to the third aspect of the present invention is the confirmation apparatus according to the first aspect, wherein the display means displays information corresponding to the displacement of the wall by at least one of a character, a symbol, and a figure. It is characterized by.

  According to this aspect, since information related to safety corresponding to the displacement of the wall is displayed on the display means by at least one of the character, the symbol, and the graphic, a plurality of workers working in the vicinity of the wall, It is possible to inform about the displacement state of the wall and to give an instruction corresponding to the displacement state. As a result, the response to the displacement of the wall can be speeded up, and the safety of the work environment in the vicinity of the wall can be improved.

  The confirmation apparatus for confirming the displacement of the wall according to the fourth aspect of the present invention is characterized in that, in the first aspect, the display means displays information corresponding to the displacement of the wall by sound.

  According to this aspect, since the information related to the safety corresponding to the displacement of the wall is displayed on the display means by sound, the safety relating to the safety corresponding to the displacement of the wall is heard by a plurality of workers working in the vicinity of the wall. Information can be delivered and the information can be made known. As a result, the safety of the work environment in the vicinity of the wall can be improved.

  The confirmation apparatus for confirming wall displacement according to the fifth aspect of the present invention is the size according to the set distance for detecting wall displacement in each light receiving region in any one of the first to fourth aspects. A plurality of optical receivers are arranged.

  According to this aspect, a plurality of light receivers having a size corresponding to the set distance for detecting wall displacement are arranged in each light receiving region. For example, a safety standard regarding the displacement of the wall is set according to the situation of the natural ground where the wall is installed, and a set distance for detecting the displacement of the wall is set based on the safety standard. Therefore, the wall displacement corresponding to the set distance can be detected by arranging a light receiver having a size corresponding to each set distance in the light receiving region. In addition, since the size of the light receiver can be set to a size corresponding to the set distance, the number of the light receivers arranged in the light receiving region can be set to an optimum number, and the cost can be reduced. Can do.

  The confirmation device for confirming the displacement of the wall according to the sixth aspect of the present invention is the confirmation device according to any one of the first to fifth aspects, wherein graduations are provided at regular intervals along the direction in which the plurality of light receiving regions are provided. It is characterized by being.

  According to this aspect, since the graduations are provided at regular intervals along the direction in which the plurality of light receiving regions are provided, the position at which the laser beam is first received after the confirmation device is attached to the wall is the origin. Then, when the wall is displaced, the distance between the position where the laser beam is received and the origin is read, so that the operator can easily confirm the amount of displacement of the wall. In addition, the measurer of the internal air displacement can easily confirm the displacement amount of the wall without hindering the operator's work. As a result, it is possible to grasp the amount of displacement of the wall even during precise measurement of the inner space displacement in the wall, and if there is a change in the displacement of the wall, it is possible to deal with it quickly. The safety of the work environment in the vicinity of the wall can be improved.

  The confirmation device for confirming the displacement of the wall according to the seventh aspect of the present invention is the attachment according to any one of the first to sixth aspects, wherein the plurality of light receiving areas and the display means are detachably attached to the wall. Means are provided.

  According to this aspect, since the attachment means for detachably attaching the plurality of light receiving regions and the display means to the wall is provided, fluctuations in natural ground in the vicinity of the wall to which the confirmation device is attached are reduced, When it is no longer necessary to confirm the displacement of the wall, the confirmation device can be removed from the wall and reattached to another position to confirm the displacement of the wall at the other position. Can be used. Therefore, cost reduction can be achieved. Further, when the confirmation device becomes an obstacle during the work of the tunnel, it can be removed once and reattached when the obstacle does not become an obstacle, and the displacement can be confirmed continuously.

According to an eighth aspect of the present invention, there is provided a method for confirming displacement of a wall that partitions a first region and a second region by receiving laser light emitted from a reference position, from a laser irradiation device provided at the reference position. A step of irradiating a laser beam in a set direction; and receiving the laser beam in a light receiving region of a confirmation device according to any one of the first to seventh embodiments attached to the wall; And a step of displaying information corresponding to the displacement of the wall on the display means based on a detection signal from a light receiving region that has received light.
According to this aspect, the effect in the 1st aspect to the 7th aspect can be obtained.

  In the structure installed in the soil in a predetermined direction from the reference position in the ninth aspect of the present invention, the first region and the second region in the cross section of the structure at a position away from the reference position in the predetermined direction In the method of confirming the displacement of the wall that partitions the region, a plurality of first displacement confirmation parts are arranged along a predetermined direction from the reference position, and between the adjacent first displacement confirmation parts, A plurality of second displacement confirmation parts are arranged, and at least three confirmation devices according to any one of the first aspect to the seventh aspect are attached to the wall of the second displacement confirmation part; A step of irradiating laser light in a set direction from a laser irradiation device provided at a reference position, and a detection signal from the light receiving region that receives the laser light in the light receiving region of each confirmation device. Based on, characterized in that it comprises the step of displaying information corresponding to the displacement of the wall on the display unit.

  According to this aspect, the second displacement confirmation unit confirms the displacement of the wall, and displays on the display means whether or not the current wall state is safe according to the displacement state of the wall. To do. Accordingly, it can be confirmed that the wall state is safe in the second displacement confirmation unit.

  According to a tenth aspect of the present invention, there is provided a method for confirming a displacement of a wall according to the ninth aspect, wherein the first displacement confirmation unit disposed at a position farthest from the reference position in the predetermined direction. When the new first displacement confirmation unit and the second displacement confirmation unit are arranged on the side opposite to the reference position, the distance from the reference position is closest to the predetermined direction. A step of removing a plurality of second displacement confirmation parts arranged between the first displacement confirmation part and a first displacement confirmation part adjacent on the side opposite to the reference position is provided. .

  According to this aspect, for example, when a structure in the soil advances to a position where the tip position of the structure is further away from the reference position, there is a change in natural ground in a newly excavated portion. Since it is large, it is necessary to constantly check the displacement of the wall. On the other hand, the wall displacement at a position close to the reference position becomes smaller when the natural ground settles down, so the frequency of confirmation can be reduced. Therefore, the second displacement confirmation unit to which the confirmation device is attached can be rearranged in the structure in accordance with the construction status of the structure. As a result, the displacement of the wall can be confirmed with a smaller number of confirmation devices than in the case where the confirmation devices are not rearranged in the structure, and the cost can be reduced.

The schematic diagram which shows arrangement | positioning of the 1st displacement confirmation part and 2nd displacement confirmation part in the structure in the soil in the 1st Example of this invention. (A) is a schematic diagram which shows the measurement point in a 1st displacement confirmation part, (B) is a schematic diagram which shows the measurement point in a 2nd displacement confirmation part. The schematic diagram which shows the measurement of the internal space displacement in the 1st displacement confirmation part in the structure in the soil in the 1st Example of this invention. The schematic diagram of the confirmation apparatus provided in the 2nd displacement confirmation part in the 1st Example. (A) is a figure which shows the arrangement | sequence state of the light receiver when the setting distance for displacement confirmation is small in the light reception area | region in a confirmation apparatus, (B) is the setting distance for displacement confirmation in the light reception area | region in a confirmation apparatus. The figure which shows the arrangement | positioning condition of the light receiver in the case of being large. (A) is the front view in one aspect of the attachment means of the confirmation apparatus which concerns on 1st Example, (B) is the side view in one aspect of the attachment means of the confirmation apparatus which concerns on 1st Example. The flowchart which shows the corresponding | compatible flow when confirming the displacement of a wall in the confirmation apparatus which concerns on a 1st Example. (A) is a front view in the other aspect of the attachment means of the confirmation apparatus which concerns on 1st Example, (B) is the side view in the other aspect of the attachment means of the confirmation apparatus which concerns on 1st Example. The schematic diagram at the time of detecting the displacement in a Z-axis direction in the confirmation apparatus which concerns on a 2nd Example. The schematic diagram at the time of detecting the displacement in a YZ-axis direction in the confirmation apparatus which concerns on a 2nd Example. The schematic diagram which shows arrangement | positioning of the confirmation apparatus which confirms the displacement of the wall in the structure in the soil which concerns on a 3rd Example. The schematic diagram which shows arrangement | positioning of the confirmation apparatus which confirms the displacement of the wall in the structure based on a 4th Example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure in each Example, the same code | symbol is attached | subjected and it demonstrates only in the first Example, The description of the structure is abbreviate | omitted in a subsequent Example.

  With reference to FIG. 1 thru | or FIG. 7, the confirmation apparatus which confirms the displacement of the wall which partitions off the 1st area | region and 2nd area | region which concerns on a 1st Example is demonstrated. Referring to FIG. 1, a tunnel 10 in an excavation state as an example of a structure in the soil according to the first embodiment is shown.

  The tunnel 10 is constructed in the X-axis direction, which is a predetermined direction in FIG. 1, and is dug in the + X-axis direction. The tunnel 10 is provided with a first displacement confirmation unit S1-1 at a position separated from the reference position X0 (see FIG. 1) by a distance L0. Further, in the present embodiment, the first displacement confirmation unit S1-2 is disposed at a position away from the first displacement confirmation unit S1-1 by the distance L1 in the + X-axis direction, and from the first displacement confirmation unit S1-2. A first displacement confirmation unit S1-3 is disposed at a position separated by a distance L1 in the + X-axis direction. That is, in the present embodiment, a plurality of first displacement confirmation sections S1-1, S1-2, S1-3,... S1-n are arranged in the tunnel 10 with the distance L1 as an interval.

  In addition, a plurality of second displacement confirmation units S2-n are disposed between the adjacent first displacement confirmation units S1-n and the first displacement confirmation units S1-n + 1. For example, in FIG. 1, second displacement confirmation units S2-1, S2-2, and S2-3 are provided between the first displacement confirmation unit S1-2 and the first displacement confirmation unit S1-3. Yes. In the present embodiment, the intervals between the second displacement confirmation units S2-1, S2-2, and S2-3 are set to be the distance L2. In addition, a plurality of second displacement confirmation units S2-n are provided between the first displacement confirmation units S1-1, S1-2, S1-3,. As arranged, second displacement confirmation units S2-1, S2-2, S2-3,... S2-n are arranged in order from the side closer to the tunnel reference position X0.

  Further, as shown in FIG. 2A, a wall 16 is provided in the tunnel 10 to partition the soil 12 as the “first region” and the space 14 as the “second region”. In the tunnel 10 at the position where the first displacement confirmation portions S1-1, S1-2, S1-3,... S1-n are provided, at least a plurality of measurement points 18 (18a, 18b, 18c) are provided. , 18d, 18e). In this embodiment, five measurement points 18a, 18b, 18c, 18d, and 18e are provided. As an example, a target (not shown) configured as a light reflecting portion is arranged at each measurement point 18a, 18b, 18c, 18d, 18e.

  As shown in FIG. 3, the person in charge of measuring the displacement inside the tunnel 10 installs the light wave range finder 20 in the tunnel 10 as necessary, and each first displacement confirmation unit S1-1, S1. -2, S1-3,..., Ranging and measuring angles with targets (not shown) arranged at measurement points 18 (18a, 18b, 18c, 18d, 18e) at S1-n as targets The displacement amount and displacement state of the wall 16 in the first displacement confirmation units S1-1, S1-2, S1-3,... S1-n are confirmed.

  In the present embodiment, the displacement confirmation using the light wave range finder 20 in the first displacement confirmation sections S1-1, S1-2, S1-3,... S1-n depends on the state of the displacement. Therefore, the tunnel work will be interrupted at a frequency determined in such a way as to avoid interruption of the work.

<<<< first embodiment >>
Next, referring again to FIG. 1, a total station 22 as a “laser irradiation device” capable of sequentially irradiating laser light in a plurality of set directions is provided in the vicinity of the top end of the tunnel 10 at the reference position X0. Yes. In the present embodiment, the total station 22 is configured to irradiate laser light in a plurality of preset directions on the + X axis direction side in FIG. Further, in the present embodiment, the total station 22 is set so as to repeatedly switch in a plurality of preset directions and irradiate laser light in order. The total station 22 (laser irradiation device) may be used for displacement measurement of the first displacement confirmation units S1-1, S1-2, S1-3,... It may have a function that can also be operated remotely.

  Referring to FIG. 2B, at least a plurality of measurement points 26 (26a, 26b) are present on the wall 16 in the second displacement confirmation sections S2-1, S2-2, S2-3,. 26c). In the present embodiment, three measurement points 26a, 26b, and 26c are provided.

  A confirmation device 28 for confirming the displacement of the wall 16 that partitions the soil 12 and the space 14 is attached to the three measurement points 26a, 26b, and 26c. As shown in FIG. 4, as an example, a confirmation device 28 is attached to the position of the measurement point 26b in the second displacement confirmation unit S2-n.

  The confirmation device 28 includes a device main body 28 a and attachment means 34. In addition, the apparatus main body 28 a includes a plurality of light receiving regions 30 provided according to the distance from the wall 16, display means 32, and a scale 40. The light receiving region 30 and the display means 32 are attached to the wall surface 16 a of the wall 16 via the attachment means 34. The confirmation device 28 extends from the wall surface 16a of the wall 16 along the direction of displacement of the wall 16 (arrow in FIG. 4). The attachment means 34 will be described after the light receiving area 30 and the display means 32 are described.

  In the present embodiment, the light receiving region 30 includes four light receiving regions 30a, 30b, 30c, and 30d. The light receiving region 30a is disposed at a position farthest from the wall 16 in a state where the confirmation device 28 is attached to the wall 16, and is disposed so as to approach the wall 16 in the order of the light receiving regions 30b, 30c, and 30d. In the present embodiment, the light receiving regions 30a, 30b, 30c, and 30d are each configured as a region of length L3 in the direction of displacement of the wall 16 (arrow in FIG. 4).

  In each of the light receiving regions 30a, 30b, 30c, and 30d, a plurality of light receivers 38 are arranged along the direction of displacement of the wall 16 (arrows in FIG. 4).

  In the present embodiment, the display means 32 includes a plurality of display units 36. In the present embodiment, the display means 32 includes four display units 36a, 36b, 36c, and 36d. In the present embodiment, the display units 36a, 36b, 36c, and 36d are configured as LED light emitting units. Each display part 36a, 36b, 36c, 36d is comprised so that it may each correspond to light reception area | region 30a, 30b, 30c, 30d.

  Specifically, when the laser beam from the total station 22 is irradiated to the light receivers 38 arranged in the light receiving region of the light receiving region 30a, a detection signal is emitted from the light receiver 38 on which the laser light is incident. And based on this detection signal, it is comprised so that the display part 36a of the display means 32 corresponding to the light reception area | region 30a in which the incident light receiver 38 is arrange | positioned may light. The display unit 36b is turned on when entering the light receiving region 30b, the display unit 36c is turned on when entering the light receiving region 30c, and the display unit 36d is turned on when entering the light receiving region 30d.

  In the present embodiment, the display units 36a, 36b, 36c, and 36d are lit and lit in blue as a normal system in a safe state, for example, based on safety standards to be described later, and the display unit 36b needs attention. In a state of caution, light is emitted and lit in green, and the display unit 36c is lit and illuminated in yellow as a state of caution. The display unit 36d is in a state that requires strict attention. As a strict caution system, it is configured to emit and light red.

  Further, scales 40 are provided at regular intervals along each light receiving region 30a, 30b, 30c, 30d, that is, along the direction of displacement of the wall 16 (arrow in FIG. 4).

  Next, the attachment means 34 will be described with reference to FIGS. 5 (A) and 5 (B). The attaching means 34 includes a holding part 42, a position adjusting mechanism 44, and a wall surface attaching part 46. The holding unit 42 holds an end portion (end portion on the + Y axis direction side in FIG. 5) of the apparatus main body 28 a in which the light receiving region 30 is provided in the confirmation device 28. The holding unit 42 detachably holds the apparatus main body 28a, and the attachment means 34 is configured to be replaceable with respect to the apparatus main body 28a.

  The position adjustment mechanism 44 includes a handle portion 48 and a screw 50. The screw 50 is formed with a male screw. The handle portion 48 is formed with a female screw that meshes with the male screw of the screw 50. That is, the handle portion 48 and the screw 50 are configured as a feed screw mechanism. Therefore, when the handle portion 48 is rotated with respect to the screw 50, the positional relationship between the handle portion 48 and the screw 50 changes, and the position of the apparatus main body 28a can be adjusted.

  Moreover, the wall surface attaching part 46 is comprised as a magnet in a present Example. Therefore, it can attach to the steel supporter 52 which comprises a part of wall 16 of the tunnel 10 so that attachment or detachment is possible.

  With this configuration, when the fluctuation of the natural ground in the vicinity of the wall 16 to which the confirmation device 28 is attached is settled and it is no longer necessary to confirm the displacement of the wall 16, the confirmation device 28 is removed from the wall and placed again at another position. Since the displacement of the wall 16 at the other position can be confirmed by attaching, the confirmation device 28 can be reused. Therefore, cost reduction can be achieved.

  Next, confirmation of the displacement of the wall 16 in the confirmation device 28 will be described with reference to FIG. 4 again. As shown in FIG. 4, the light receiver disposed at the position farthest from the wall 16 in the light receiving region 30a is denoted by reference numeral 38a. The black circle light receiver denoted by reference numeral 38a is in a state of receiving the laser light from the total station 22.

  This state is the initial state of the confirmation state in the confirmation device 28 attached to the wall 16. When the confirmation device 28 is attached to the wall 16, the distance from the wall 16 of the device main body 28a is the position adjusting mechanism of the attachment means 34 so that the laser beam from the total station 22 is incident on the light receiver denoted by reference numeral 38a. 44.

  Next, when the wall 16 of the tunnel 10 is displaced in the Y-axis direction in FIG. 4 due to the pressure from the soil 12 or the natural ground, the confirmation device 28 is also displaced in the Y-axis direction along with the displacement of the wall 16 in the −Y-axis direction. Specifically, when the wall 16 of the tunnel 10 is displaced in the −Y axis direction, the confirmation device 28 is also displaced in the −Y axis direction.

  Here, since the laser beam from the total station 22 is irradiated in the set direction, the light receiving region 30 is displaced in the −Y-axis direction with respect to the laser beam. Specifically, as the light receiving region 30 is displaced with respect to the laser light from the total station 22, the light receiving device 38 that receives the laser light changes from the light receiving device 38a in the light receiving region 30a to the light receiving device 38b and the light receiving region 30c in the light receiving region 30b. The light receiver 38c in FIG. 5 and the light receiver 38d in the light receiving region 30d are sequentially switched.

  As a result, the display unit 36a that has been lit while the laser beam from the total station 22 is incident on the light receiving region 30a is displaced relative to the light receiver 38b in the light receiving region 30b. Turns off. Next, the laser light from the total station 22 enters the light receiver 38b in the light receiving region 30b, so that the display unit 36b is turned on. That is, when the light receiving regions 30a, 30b, 30c, and 30d are displaced with respect to the laser light from the total station 22, the lighting states are switched in the order of the display units 36a, 36b, 36c, and 36d.

  Therefore, in this embodiment, the display unit 36 of the display unit 32 of the confirmation device 28 is switched in the order of blue, green, yellow, and red according to the displacement of the wall 16. A plurality of workers who work can be visually notified of the displacement state of the wall 16. As a result, information regarding safety can be shared between workers, and the response to the displacement of the wall 16 can be speeded up. Therefore, the safety of the work environment in the vicinity of the wall 16 can be improved.

  Further, since the graduations 40 are provided at regular intervals along the light receiving areas 30a, 30b, 30c, and 30d, the position of the graduations 40 corresponding to the light receivers 38a is set as the origin, and the laser beam is displaced by the displacement of the rear wall 16. When the light receiving device that receives light is switched from the light receiving device 38a to any one of the light receiving devices 38b, 38c, and 38d, the position set as the origin on the scale 40 and any of the light receiving devices 38b, 38c, and 38d that receive the laser light. The distance from the corresponding position on the scale 40 can be easily read. That is, the displacement amount in the wall 16 can be easily confirmed.

  Further, a measurer of the internal air displacement in the tunnel 10 can easily confirm the amount of displacement of the wall 16 without hindering the work of the worker working near the wall 16. As a result, the amount of displacement of the wall 16 can be grasped even during the precise measurement of the internal displacement of the wall 16 in the first displacement confirmation unit S1-n. Therefore, the safety of the work environment in the vicinity of the wall 16 can be improved.

  Next, the set distance L3 for detecting the displacement of the wall 16 in the light receiving region 30 will be described with reference to FIGS. 6 (A), 6 (B) and Table 1. FIG.

  Here, D3-a to C1-a shown on the vertical axis of Table 1 are standards set according to the hardness of the ground of the ground where the tunnel 10 is installed. Levels 1 to 3 shown on the horizontal axis are safety standards corresponding to the amount of displacement of the wall 16 in the tunnel 10. Specifically, level 1 indicates a normal system, level 2 indicates a caution system, and level 3 indicates a caution system. The numbers in Table 1 indicate the displacement amount (mm) of the wall 16.

  Further, taking D3-a as an example, when the wall 16 is displaced, the level of displacement of the wall 16 is between 0 mm and 19 mm, which is level 1 (normal regime), and the amount of displacement of the wall 16 is from 19 mm to 38 mm. Level 2 (attention system) between the two, level 3 (attention system) when the displacement of the wall 16 is between 38 mm and 56 mm, and strict attention system as level 4 when the displacement of the wall 16 exceeds 56 mm It is set to become. Further, the displacement amount between the levels in D3-a is set to 19 mm, and this 19 mm is set as a set distance for changing the level.

  In other words, in the tunnel 10 installed in the ground of D3-a, the warning posture is raised by one level when displaced by 19 mm or more between each level based on safety standards. Therefore, in this tunnel 10, the length L3 of the light receiving regions in the light receiving regions 30a, 30b, 30c, and 30d corresponding to level 1 to level 4 is set to 19 mm.

  And the setting distance based on the safety standard in the tunnel 10 installed in the natural ground corresponding to D2-a, D1-a, C2-a, C1-a is 15 mm, 9 mm, 4 mm, and 4 mm, respectively. The lengths L3 of the light receiving areas in the light receiving areas 30a, 30b, 30c, and 30d are set to 15 mm, 9 mm, 4 mm, and 4 mm, respectively, corresponding to the set distance.

  Therefore, in the confirmation device 28, the set distance, that is, the value of the length L3 of each light receiving region 30 is set according to the hardness of the ground of the ground where the tunnel 10 is installed. That is, the length L3 in each light receiving region 30 is set to a different distance depending on the hardness of the ground of the tunnel 10 to be installed. The set distance is merely an example, and the set distance is a value set in consideration of various conditions in addition to the hardness of the ground of the ground where the tunnel 10 is installed.

  FIG. 6A shows an arrangement of the light receivers 38e when the set distance (L3) is set to 19 mm as an example. FIG. 6B shows an arrangement of the light receivers 38f when the set distance (L3) is set to 4 mm as an example. Here, the size of the light receivers 38 arranged in the light receiving region 30 in the confirmation device 28 can be set to a size corresponding to each set distance (L3).

  That is, the size of the light receiver 38e that can be arranged in the light receiving region 30 in FIG. 6A is set with an upper limit of 19 mm. Accordingly, in FIG. 6A, the size of the light receiver is 19 mm, and the light receivers 38 having a size smaller than 19 mm are arranged in a line in the displacement direction of the wall 16 (Y-axis direction in FIG. 6A). It is also possible to use a plurality of rows in the displacement direction of the wall 16 (Y-axis direction in FIG. 6A).

In FIG. 6B, the size of the light receiver 38f that can be arranged in the light receiving region 30 is set with an upper limit of 4 mm, and a light receiver 38 having a small size can be used within this range. Good. In this embodiment, the light receiver 38 is configured as a photodiode.

  That is, by arranging the light receivers 38 having a size corresponding to each set distance (L3) in the light receiving region 30, the displacement of the wall 16 corresponding to the set distance (L3) can be detected. In addition, since the size of the light receiver 38 can be set according to the set distance (L3), the number of the light receivers 38 arranged in the light receiving region 30 can be set to an optimum number, and the cost can be reduced. Can be planned.

  Next, a method for confirming the displacement of the wall 16 using the confirmation device 28 in the first embodiment will be described with reference to FIG.

  As shown in FIG. 1 and FIG. 4, in the state where the confirmation device 28 is attached to each of the measurement points 26a, 26b and 26c of the wall 16 in the second displacement confirmation unit S2-n, the reference position X0 ( Laser light is emitted from a total station 22 arranged in a predetermined direction along the excavation direction of the tunnel 10 (the + X axis direction in FIG. 1) from the total station 22 arranged in FIG.

  In the present embodiment, the set direction of the laser beam of the total station 22 does not indicate only one direction, but the displacement can be confirmed by the confirmation device 28 in each second displacement confirmation unit S2-n. A plurality of directions are set as follows. That is, the total station 22 irradiates the laser beam by sequentially switching a plurality of setting directions. In addition, since the laser irradiation interval in each confirmation device 28 can be shortened by shortening the irradiation switching time in a plurality of setting directions of the laser light in the total station 22, the single confirmation device 28 always receives the laser light. By continuing to confirm the displacement of the wall 16, it is possible to obtain substantially the same effect.

  Next, in step S2, when the laser beam from the total station 22 is received in the light receiving region 30 of the confirmation device 28, step S3 or step S5 is selected depending on whether or not the light receiving region 30 is the level 1 light receiving region 30a. When the received light receiving area 30 is the level 1 light receiving area 30a, in step 3, information corresponding to the normal system is displayed on the display unit 36 as level 1. In the present embodiment, the display unit 36a is lit in blue to notify a nearby worker that the displacement state of the wall 16 is the normal system.

  As Step 4, since the displacement state of the wall 16 is a normal system, laser light is emitted from the total station 22 at regular intervals, and the confirmation device 28 in each second displacement confirmation unit S2-n performs timed measurement. . If the displacement of the wall 16 does not exceed the set distance (L3) of level 1, steps S1 to S4 are repeated.

  In step S2, when the laser light from the total station 22 is received in the light receiving region 30 of the confirmation device 28, if the light receiving region 30 is not the level 1 light receiving region 30a, step S5 is selected. In step S5, step S6 or step S10 is selected based on whether or not the light receiving region 30 is the level 2 light receiving region 30b.

  If the received light receiving region 30 is the level 2 light receiving region 30b, information corresponding to the attention system is displayed on the display unit 36 as level 2 in step S6. In the present embodiment, the display unit 36b is lit in green, and informs a nearby worker that the displacement state of the wall 16 is a caution system.

  Next, as step S7, the number of scheduled measurements in the total station 22 and the confirmation device 28 is increased to enhance the measurement frequency. Furthermore, in step S8, the person in charge of measuring the internal displacement of the tunnel 10 as a site inspection uses the light wave distance measuring device 20 as shown in FIG. 3 for the first displacement confirmation units S1-1, S1-2, S1-. 3. Check displacement of wall 16 at S1-n. Further, in step 9, not only the display means 32 of the confirmation device 28 but also the on-site manager or the like reinforces attention to the worker about the displacement state of the wall 16. Then, it returns to step 1 and confirms the displacement of the wall 16 again.

  In step S5, when the laser light from the total station 22 is received in the light receiving region 30 of the confirmation device 28, if the light receiving region 30 is not the level 2 light receiving region 30b, step S10 is selected. In step S10, step S11 or step S14 is selected based on whether or not the light receiving region 30 is the level 3 light receiving region 30c.

  When the received light receiving region 30 is the level 3 light receiving region 30c, information corresponding to the system requiring attention is displayed on the display unit 36 as level 3 in step S11. In the present embodiment, the display unit 36c lights up in yellow, and informs a nearby worker that the displacement state of the wall 16 is a system requiring attention.

  Next, as step S12, the number of scheduled measurements in the total station 22 and the confirmation device 28 is increased to enhance the measurement frequency. Furthermore, a countermeasure work is performed in step S13 to suppress the displacement of the wall 16. In the present embodiment, as an example, at least one countermeasure against an additional lock bolt and a leg bolt is implemented. Then, it returns to step 1 and confirms the displacement of the wall 16 again.

  In step S10, when the laser light from the total station 22 is received in the light receiving region 30 of the confirmation device 28, if the light receiving region 30 is not the level 3 light receiving region 30c, step S14 is selected. If the received light receiving region 30 is the level 4 light receiving region 30d, information corresponding to the strict alert system is displayed on the display unit 36 as level 4 in step S14. In the present embodiment, the display unit 36d is lit red, and informs a nearby worker that the displacement state of the wall 16 is a strict alert system.

  Next, the construction of the tunnel 10 is stopped as step S15. Then, in step S16, the direction and amount of displacement are confirmed based on the information displayed on the display means 32 of at least three confirmation devices 28, and the inside of the tunnel 10 is confirmed based on these information and the information obtained in step S8. The deformation factor / trend of the wall 16 is analyzed. In step S17, the reinforcement of the tunnel 10 is examined, and in step S18, the examined reinforcement is performed in the tunnel 10. In the present embodiment, inversion early merger is performed as an example. Then, it returns to step 1 and confirms the displacement of the wall 16 again.

  In summary, the confirmation device 28 attached to the wall 16 is set from the reference position X0 in any of the plurality of light receiving regions 30a, 30b, 30c, 30d provided according to the distance from the wall 16. When the laser beam irradiated in the direction is received, any one of the level 1 to level 4 information relating to the safety corresponding to the displacement of the wall 16 is displayed according to the detection signal from the light receiving region 30 that has received the laser beam. 32 can be displayed. In addition, for example, by receiving laser light from the reference position X0 continuously or at an extremely short time interval in any one of the light receiving regions 30a, 30b, 30c, and 30d, the display unit 32 is related to safety corresponding to the displacement of the wall 16. You can continue to display information. As a result, a worker working in the vicinity of the wall 16 can know the current displacement state of the wall 16 without depending on a person in charge of measuring the internal displacement, and can continue working in a safe environment. .

  Further, by irradiating laser light from the total station 22 continuously or at an extremely short time interval, it is possible to promptly display a change in the level of displacement of the wall 16 on the display means 32. As a result, the person in charge of the internal air displacement can reconfirm the displacement in the wall 16 where the change has occurred without taking time from the display of the level change. Since the step of suppressing the displacement of the wall 16 can be performed based on the reconfirmed information on the displacement state of the wall 16, it can be quickly suppressed after detecting the change in the displacement of the wall 16. The safety of the work environment in the vicinity of 16 can be improved.

  In this embodiment, the second displacement confirmation unit S2-n confirms the displacement of the wall 16 and displays whether the current state of the wall 16 is safe according to the displacement state of the wall 16. Display on the means 32.

  Further, referring to FIG. 1 again, the tip of the tunnel 10 is excavated as the construction progresses, and the tunnel 10 moves away from the reference position X0 along the + X axis direction from the reference position X0. Therefore, until the tunnel 10 is completed, a new first displacement confirmation unit S1-n and a new second displacement confirmation unit S2-n are arranged in a direction away from the reference position X0. Here, in the newly excavated part, since the fluctuation of the natural ground is large, the first displacement confirmation unit S1-n and the second displacement confirmation unit S2-n newly disposed measure the displacement of the wall. Must be done frequently.

  On the other hand, in the portion of the tunnel 10 on the side close to the reference position X0, the stress of the natural ground acting on the wall 16 is relieved as time elapses after the excavation, and the natural ground is stabilized. The force acting on the tunnel wall 16 on the side close to X0 decreases, and the displacement of the wall 16 decreases. Therefore, the frequency of the displacement confirmation of the wall 16 in the second displacement confirmation unit S2-n on the side closer to the reference position X0 can be reduced.

Further, when it is considered that the displacement of the wall 16 on the side close to the reference position X0 has greatly decreased and almost no displacement has occurred, for example, the second displacement confirmation units S2-1 and S2- on the side close to the reference position X0. 2 and S2-3 can be removed from the wall 16 and attached to a plurality of second displacement confirmation sections S2-n newly disposed at the tip of the tunnel 10 and rearranged. . As a result, the displacement of the wall 16 can be confirmed with a smaller number of confirmation devices 28 than in the case where the confirmation devices 28 are not rearranged in the tunnel 10, and the cost can be reduced.

<<< Modification of the first embodiment >>>
(1) In the present embodiment, the light receiving region 30 is configured to correspond to four levels, but instead of this configuration, a plurality of light receiving regions may be provided to correspond to many levels. Good. In this case, also in the display means 32, the number of the display parts 36 may be increased so as to correspond to the increased light receiving area.
(2) In the present embodiment, the display unit 36 is configured as an LED light emitting unit. However, the display unit 36 may be configured by a rotating lamp, a light, or the like. You may comprise so that it may emit light.

(3) In this embodiment, the light receiver 38 is configured as a photodiode, but instead of this configuration, a combination of a photodiode and a condensing lens, an optical fiber, or the like may be used. That is, the light receiver 38 in the present embodiment may be configured so that it can detect the reception of the laser light when the laser light from the total station 22 is received.
(4) In the present embodiment, the display means 32 is configured to display information related to safety corresponding to the displacement of the wall 16 depending on how the display section 36 emits light. Instead of this structure, the display means 32 is a character, Information corresponding to the displacement of the wall may be displayed by at least one of a symbol and a graphic, and information corresponding to the displacement of the wall may be displayed by sound.

  When the display unit 32 displays information corresponding to the displacement of the wall by at least one of a character, a symbol, and a figure, a plurality of workers working in the vicinity of the wall 16 can be notified of the displacement state of the wall 16. In addition, an instruction corresponding to the displacement state of the wall 16 can be given. As a result, the response to the displacement of the wall 16 can be speeded up, so that the safety of the work environment in the vicinity of the wall 16 can be improved.

  In addition, when the display unit 32 displays information corresponding to the displacement of the wall by sound, information on safety corresponding to the displacement of the wall 16 can be delivered to the hearing of a plurality of workers working in the vicinity of the wall 16. , The information can be made known. As a result, the safety of the work environment in the vicinity of the wall 16 can be improved.

(5) In the present embodiment, the attachment means 34 is configured to be detachably attached to the steel support 52, and the wall surface attachment portion 46 is configured as a magnet. However, instead of this configuration, FIG. 8 (A) and FIG. As shown in B), it may be configured to be driven and attached to shotcrete 54 blown to the wall 16 of the tunnel. In this configuration, an anchor 56 is provided on the attachment means 34 instead of the wall surface attachment portion 46.
(6) In this embodiment, at least one countermeasure for the lock bolt and the leg bolt is implemented in the level 3 caution system. Instead of this configuration, the lock is increased in the level 2 caution system. It is good also as a structure by which at least 1 countermeasure of a volt | bolt and a leg volt | bolt is implemented. Further, in this embodiment, the measures for suppressing the displacement of the wall 16 of the tunnel 10 are increased and the lock bolt, the leg bolt and the invert early merger are combined. However, methods other than these methods are used to suppress the displacement of the wall 16 of the tunnel 10. It may be a countermeasure.

(7) In the present embodiment, the interval between the first displacement confirmation units S1-1, S1-2, S1-3,... S1-n is set as a constant distance L1, but instead of this configuration. The distances between the first displacement confirmation sections may be different distances. Similarly, the distances between the second displacement confirmation units S2-1, S2-2, S2-3,... S2-n may be different distances instead of the constant distance L2.
(8) Further, in this embodiment, the confirmation device 28 includes three measurement points 26a and 26b on the wall 16 in the second displacement confirmation units S2-1, S2-2, S2-3,. 26c, that is, a configuration in which the confirmation device 28 is attached to the floor surface portion of the tunnel 10, instead of this configuration.
(9) In the present embodiment, the second displacement confirmation unit S2 corresponds to the displacement of the wall 16 in the second displacement confirmation units S2-1, S2-2, S2-3,... S2-n. -1, S2-2, S2-3,... S2-n, a target (not shown) configured as a light reflecting unit is installed, and first displacement confirmation units S1-1, S1-2, S1 are installed. -3,... S1-n may be configured to carry out a step of confirming the displacement of the wall 16 in detail.
(10) Further, in this embodiment, the confirmation device 28 is provided at the zenith portion of the wall 16 in the second displacement confirmation portions S2-1, S2-2, S2-3,. 4, that is, the sinking of the tunnel 10 can be confirmed based on the height in the Z-axis direction at the reference position X0 of the tunnel 10.

<<< second embodiment >>>
With reference to FIG.9 and FIG.10, the confirmation apparatus which concerns on a 2nd Example is demonstrated. When the tip of the tunnel 10 is separated from the reference position X0 (see FIG. 1) by excavation in the tunnel 10, the tip of the tunnel 10 may be displaced in the Z-axis direction in FIG. That is, when the height in the Z-axis direction at the reference position X0 of the tunnel 10 is taken as 0 reference, the tip of the tunnel 10 may sink in the −Z-axis direction. In this embodiment, in addition to the displacement of the wall of the tunnel 10, the confirmation device 70 also confirms the settlement of the tunnel 10.

  Referring to FIGS. 9 and 10, a confirmation apparatus 70 according to the second embodiment is shown. In contrast to the configuration in which the confirmation device 28 according to the first embodiment confirms the state of displacement in a predetermined direction (Y-axis direction in the example of FIG. 4), the confirmation device 70 according to the second embodiment has a plurality of directions. This is different from the first embodiment in that the displacement state in the Y-axis direction, the Z-axis direction, and the YZ-axis direction in FIGS. 9 and 10 can be confirmed.

  The confirmation device 70 in this embodiment is also attached to and detached from the three measurement points 26a, 26b, and 26c provided on the wall 16 in the second displacement confirmation units S2-1, S2-2, S2-3,. It is attached as possible. As shown in FIG. 9, the confirmation apparatus 70 is attached to the position of the measurement point 26b of the wall 16 in 2nd displacement confirmation part S2-n as an example.

  The confirmation device 70 includes a device main body 70a and attachment means 34. The apparatus main body 70a includes a plurality of light receiving areas 72a, 72b, 72c, 72d, a display means 32, and scales 40, 40. The light receiving area 72 and the display means 32 are attached to the wall surface 16 a of the wall 16 via the attachment means 34. In this embodiment, the confirmation device 70 is set so that the length in the Y-axis direction and the length in the Z-axis direction in FIGS. 9 and 10 are the same. It should be noted that the length in the Y-axis direction and the length in the Z-axis direction in the confirmation device 70 can be set as appropriate. For example, the length in the Z-axis direction can be set to double the length in the Y-axis direction. Is possible.

  In the confirmation device 70, the light receiving region 72 a includes a plurality of light receivers 38. In the present embodiment, the light receiving region 72a is formed in a square shape. That is, the same number of light receivers 38 are attached to the light receiving region 72a in the Y-axis direction and the Z-axis direction in FIGS. Next, in the present embodiment, the light receiving regions 72b, 72c, 72d are each formed in a crank shape. 9 and 10, the light receiving area 72a is adjacent to the light receiving area 72b in the + Y axis direction and the + Z axis direction, the light receiving area 72b is adjacent to the light receiving area 72c in the + Y axis direction and the + Z axis direction, and the light receiving area 72c is It is adjacent to the light receiving region 72d in the + Y axis direction and the + Z axis direction.

  Also in this embodiment, the light receiving regions 72a, 72b, 72c, 72d in the confirmation device 70 confirm the displacement of the wall 16, and thus the wall 16 in the displacement direction of the wall 16 (Y-axis direction in FIGS. 9 and 10). It arrange | positions based on the said safety standard according to the distance from.

  Also in the present embodiment, the light receiving areas 72a, 72b, 72c, 72d correspond to the display sections 36a, 36b, 36c, 36d, and when the laser light from the total station 22 is received by the light receiving area 72a, the display section 36a. When the laser light from the total station 22 is received in the light receiving area 72b, the display section 36b is turned on. When the laser light from the total station 22 is received in the light receiving area 72c, the display section 36c is turned on. When the laser beam from the total station 22 is received at 72d, the display unit 36d is turned on.

  Further, in the present embodiment, the scales 40 are arranged not only to extend in the Y-axis direction in FIG. 9 in the apparatus main body 70a but also to extend in the Z-axis direction in FIG. That is, in this embodiment, not only the displacement amount in the Y-axis direction but also the displacement amount in the Z-axis direction can be confirmed.

  Next, confirmation of displacement in the Z-axis direction in the confirmation device 70 will be described with reference to FIG. Note that the confirmation of the displacement in the Y-axis direction in the confirmation device 70 is the same as in the first embodiment, and therefore the description thereof is omitted.

  In FIG. 9, a confirmation device 70 is attached to the wall 16 and a light receiver that first receives laser light from the total station 22 is a light receiver 38g. When the height in the Z-axis direction at the reference position X0 in the tunnel 10 is defined as 0 reference, when the second displacement confirmation unit S2-n to which the confirmation device 70 is attached is displaced in the -Z-axis direction, the confirmation device 70 is also combined. Displacement in the -Z-axis direction. On the other hand, since the laser beam from the total station 22 moves relative to the confirmation device 70, it moves in the + Z-axis direction.

  As a result, the light receivers that receive the laser light from the total station 22 change to a light receiver 38g, a light receiver 38h, a light receiver 38i, and a light receiver 38j in accordance with the amount of displacement in the −Z-axis direction. Therefore, the confirmation device 70 can confirm the displacement in the Z-axis direction in the light receiving areas 72a, 72b, 72c, and 72d, and can display information based on the safety standard on the corresponding display units 36a, 36b, 36c, and 36d. .

  In the tunnel 10, the displacement of the wall 16 and the settlement of the tunnel 10 in the −Z axis direction may occur simultaneously. Confirmation of displacement in the YZ-axis direction in the confirmation device 70 in this case will be described with reference to FIG. Also in FIG. 10, the confirmation device 70 is attached to the wall 16, and the light receiver that first receives the laser light from the total station 22 is referred to as a light receiver 38g.

  When the wall 16 is displaced in the -Y-axis direction, the confirmation device 70 is also displaced in the -Y-axis direction, and the second displacement confirmation unit S2-n provided with the confirmation device 70 is moved in the Z-axis direction at the reference position X0 of the tunnel 10. When the height is set to 0 reference, the confirmation device 70 is also displaced in the −Z-axis direction when displaced in the −Z-axis direction. Therefore, the displacement in the −Y axis direction and the displacement in the −Z axis direction are combined, and the confirmation device 70 is displaced in the −YZ axis direction. On the other hand, since the laser beam from the total station 22 moves relative to the confirmation device 70, it moves in the YZ axis direction.

  That is, the light receivers that receive the laser light from the total station 22 change to the light receivers 38g, 38k, 38m, and 38n according to the amount of displacement in the YZ axis direction. Therefore, the confirmation device 70 can confirm the displacement in the Z-axis direction in the light receiving areas 72a, 72b, 72c, and 72d, and can display information based on the safety standard on the corresponding display units 36a, 36b, 36c, and 36d. .

  Therefore, the confirmation device 70 according to the present embodiment can confirm the displacement of the wall 16 and the settlement of the tunnel 10, that is, the two-dimensional displacement in the light receiving region 72. In addition, the display unit 32 can present information based on the safety standard to the worker about the displacement of the wall 16 obtained in the light receiving region 72 and the occurrence of subsidence in the tunnel 10.

<<< Third embodiment >>>
With reference to FIG. 11, a confirmation device for confirming displacement of a wall separating the soil as the “first region” and the space as the “second region” according to the third embodiment will be described. Referring to FIG. 11, a vertical shaft 60 in an excavation state as an example of a structure in the soil in the third embodiment is shown, and a retaining wall 62 is shown as a wall that partitions the soil and the space. Yes. The first embodiment is different from the first embodiment in that the first embodiment confirms the displacement of the wall in the vertical shaft, whereas the first embodiment confirms the displacement of the wall in the horizontal shaft.

  In FIG. 11, earth retaining walls 62, 62 extending from the vertical shaft entrance toward the ground are provided. A plurality of beam members 64 are provided between the earth retaining wall 62 and the earth retaining wall 62 at a position appropriately spaced from the ground. The beam members 64 support the retaining wall 62 against the stress that the retaining wall 62 receives from the natural ground. Then, as the vertical shaft 60 is deepened by excavating in the −Z-axis direction in FIG. 11, the cut beam material 64 is newly arranged with an appropriate distance in the −Z-axis direction, and the displacement due to the stress of the retaining wall 62 is changed. Suppress.

  In the present embodiment, a plurality of confirmation devices 28 are provided on the earth retaining wall 62 at an appropriate distance from the vertical shaft entrance to the excavation tip of the vertical shaft. The confirmation device 28 extends along the displacement direction of the retaining wall 62, that is, the Y-axis direction in FIG.

  In the present embodiment, the total station 22 is disposed outside the retaining wall 62 in the vicinity of the vertical shaft entrance, and is disposed on the foundation structure 66 that is not affected by the displacement of the retaining wall 62. Further, in this embodiment, since the total station 22 is disposed outside the vertical shaft entrance, a region where the laser beam cannot be irradiated in the vertical shaft 60 is generated in one total station 22.

  For this reason, in this embodiment, the two total stations 22 are provided at positions facing each other at the vertical shaft entrance. Each total station 22 irradiates a laser beam in a set direction or a set position on the earth retaining wall 62 located on the opposite total station 22 side. The laser light is received by the light receiving region 30 of the confirmation device 28 provided on the retaining wall 62, and information related to safety is displayed on the display means 32 in accordance with the displacement of the retaining wall 62.

  Also in the present embodiment, since the information about safety is displayed on the display means 32 in each confirmation device 28, the safety of the working environment in the shaft 60 can be improved.

<<<< Modification of the third embodiment >>>>
(1) In this embodiment, two total stations 22 are provided. However, the total station 22 is provided above the vertical shaft entrance (in the + Z axis direction in FIG. 11) in the vicinity of the central portion of the vertical shaft 60. It is good also as a structure which confirms the displacement of the earth retaining wall 62 in all the confirmation apparatuses 28 in the vertical shaft 60 with one total station 22. FIG.
(2) In the present embodiment, the confirmation device 28 is disposed in the vertical shaft 60. However, instead of this structure, the confirmation device 70 according to the second embodiment may be disposed.

<<< Fourth embodiment >>>
A fourth embodiment will be described with reference to FIG. In the fourth embodiment, the confirmation device 28 is provided on the wall of a building 68 such as a building. Specifically, the confirmation device 28 is attached to the building 68 so as to confirm the displacement of the wall separating the inside of the building as the “first region” and the outside of the building as the “second region”. Yes.

  In the present embodiment, the light receiving region 30 of the confirmation device receives the laser light irradiated in the direction set from the total station 22 installed outside the building 68, and the displacement of the wall is displayed on the display means 32. It is configured as follows.

<<<< Modification Example of Fourth Embodiment >>>>
(1) In this embodiment, the confirmation device 28 is attached to a building 68 such as a building, but instead of this structure, it may be attached to a bridge or a steel tower.
(2) In this embodiment, the confirmation device 28 is attached to the building 68 such as a building. However, instead of this structure, the confirmation device 70 according to the second embodiment may be attached.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

10 tunnels, 12 underground, 14 spaces, 16 walls, 16a wall surfaces,
18, 18a, 18b, 18c, 18d, 18e, 26, 26a, 26b, 26c Measurement point, 20 Lightwave distance measuring device, 22 Total station, 28, 70 Confirmation device,
28a, 70a apparatus main body, 30, 30a, 30b, 30c, 30d, 72, 72a, 72b, 72c, 72d light receiving area, 32 display means, 34 mounting means,
36, 36a, 36b, 36c, 36d display section,
38, 38a, 38b, 38c, 38d, 38e, 38f, 38g, 38h, 38i, 38j, 38k, 38m, 38n Receiver, 40 scale, 42 holding section, 44 position adjustment mechanism, 46 wall mounting section, 48 handle section , 50 screws, 52 steel support,
54 shotcrete, 56 anchors, 60 shafts, 62 retaining walls, 64 beams, 66 foundation structures, 68 buildings, L0, L1, L2 distances, L3 set distances,
S1-1, S1-2, S1-3, S1-n first displacement confirmation unit,
S2-1, S2-2, S2-3, S2-n Second displacement confirmation unit, X0 reference position

Claims (11)

By receiving a laser beam emitted in a direction determined by the reference position, to check the displacement to the second region side from the first region side of the wall separating the first region and the second region, the wall A confirmation device attached to the
A plurality of light receiving regions provided according to the distance from the wall;
Display means for displaying information corresponding to the displacement of the wall in response to a detection signal from the light receiving region that has received the laser beam;
Equipped with a,
In each light receiving region, a plurality of light receivers for detecting wall displacement are arranged,
The display means includes a plurality of display units respectively corresponding to detection signals from the respective light receiving regions,
Each display unit displays the information when the laser beam is received by any one light receiver in the corresponding light receiving region.
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claim 1,
A plurality of the light receiving regions are provided in a first direction and a second direction that intersects the first direction;
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claim 1 or Claim 2 ,
The display means displays information corresponding to the displacement of the wall according to the manner of light emission.
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claim 1 or Claim 2 ,
The display means displays information corresponding to the displacement of the wall by at least one of a character, a symbol, and a graphic;
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claim 1 or Claim 2 ,
The display means displays information corresponding to the displacement of the wall by sound;
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claims 1-5,
The light receiver is a size corresponding to the set distance, or a size smaller than the set distance.
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claims 1-6,
Scales at regular intervals are provided along the direction in which the plurality of light receiving regions are provided,
The confirmation apparatus which confirms the displacement of the wall characterized by this. In the confirmation apparatus which confirms the displacement of the wall of Claim 1-7,
An attachment means for detachably attaching the plurality of light receiving areas and the display means to the wall;
The confirmation apparatus which confirms the displacement of the wall characterized by this. A method of confirming the displacement from the first region side to the second region side of the wall that partitions the first region and the second region by receiving laser light emitted from a reference position,
Irradiating a laser beam in a direction set from a laser irradiation device provided at a reference position;
Receiving the laser beam in the light receiving region of the confirmation device according to any one of claims 1 to 8 attached to the wall, based on a detection signal from the light receiving region that has received the laser light, Displaying information corresponding to the displacement of the wall on the display means;
Comprising
A method for confirming the displacement of a wall that partitions the first region and the second region. Wherein from the group reference position of the wall separating the first region and the second region in the cross section of the structure at a position spaced in the predetermined direction in the structure to be installed in the ground toward the reference position in a predetermined direction A method for confirming displacement from a first region side to the second region side ,
A plurality of first displacement confirmation units that measure the displacement of the wall by a light wave range finder that can be arranged at the reference position or a position shifted from the reference position in a predetermined direction along the predetermined direction from the reference position. A plurality of second displacement confirmation units are arranged between the adjacent first displacement confirmation units,
At least three confirmation devices according to any one of claims 1 to 7 are attached to the wall of the second displacement confirmation unit,
Irradiating a laser beam in a direction set from a laser irradiation device provided at a reference position;
Receiving the laser beam in the light receiving region of each confirmation device, and displaying information corresponding to the displacement of the wall on the display unit based on a detection signal from the light receiving region receiving the laser beam;
Comprising
A method for confirming the displacement of a wall characterized by that. The confirmation method according to claim 10 ,
A plurality of first displacement confirmation portions arranged at positions closest to the reference position in the predetermined direction and a plurality of first displacement confirmation portions adjacent on the opposite side of the reference position. The confirmation device attached to the wall in the second displacement confirmation unit is removed from the wall, and the first displacement confirmation unit disposed at a position farthest from the reference position in the predetermined direction. A new first displacement confirmation unit and a second displacement confirmation unit are disposed on the side opposite to the reference position, and the removed confirmation device is attached to the wall of the newly disposed second displacement confirmation unit. Comprising the steps,
A method for confirming the displacement of a wall characterized by that.

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