JP2018072154A - Surface abnormality sensing device and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface abnormality sensing device capable of surely detecting collapse of an inclined surface with a simple structure and an installation method thereof.SOLUTION: A pile 11 for detection of a surface abnormality sensing device 10 comprises: a hollow pile part 20 which is driven into an inclined surface; and a detection part 30 provided in the pile part 20. The detection part 30 comprises: a contact part 31 formed of a metal rod which contacts an inner wall surface 21s of the pile part 20 and conducts the inner wall surface; and a support part 32 for supporting the contact part 31 in a state of extending in a vertical direction F1. When a surface layer of the inclined surface is collapsed, moved and the pile part 20 is inclined, the contact part 31 which is supported in an extending state in the vertical direction F1 by the support part 32 and becomes a second electrode part contacts the pile part 20 which becomes a first electrode part. Therefore, slight movement of the surface layer of the inclined surface can be detected. Collapse of the inclined surface can be detected in advance.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surface layer abnormality sensing device for sensing collapse of a range including a surface layer of an inclined surface and a method for installing the device.

An inclinometer is known as a device that senses that it has tilted.
For example, the “inclination angle detection device” described in Patent Document 1 has a pendulum suspended from an upper plate of a box, a fine wire attached at the upper end to the pendulum, and suspended from the bottom hole of the box, and a lower end of the fine wire. When the pendulum tilts, the thin line moves the striker to close the switch and issue an alarm.

  In addition, the “tilt vibration sensor, tilt vibration sensing device, and portable alarm device” described in Patent Document 2 has a conductive electrode made of a highly elastic stainless steel wire, which is lowered on a fixed electrode made of a copper cylinder. A movable electrode consisting of a conductive ball weight is fixed to the lower end of the member in conduction with the conductive member, and when tilted, the movable electricity contacts the fixed electrode and detects tilt (vibration). .

  It is described that the inclination angle detection device described in Patent Document 1 is suitable for a deck crane. It is described that the tilt vibration sensor described in Patent Document 2 can be applied to an alarm device that is mainly carried by a fire brigade member, a rescue team member, a mountain climber, a construction worker, a guard, and the like while being fixed to a belt.

  A device described in Patent Document 3 is known as a device for detecting the surface layer collapse of an inclined surface. The landslide detection device described in Patent Document 3 includes an inclination detection sensor for detecting an inclination state of a pile portion driven into the ground, a lower electrode body composed of a conical electrode with a recessed central portion, and a lower electrode body And an upper electrode body facing each other, and a ball member provided between them, and the ball member detects an inclined state by energizing the outer periphery of the upper electrode body and the lower electrode body. That's it.

Japanese Utility Model Publication No. 48-8294 Japanese Patent Laid-Open No. 11-6732 JP 2009-63304 A

The inclination detection sensor in the landslide detection device described in Patent Document 3 can be the one described in Patent Document 1 or the one described in Patent Document 2, and various inclinometers can be applied. Seem.
However, the landslide detection device described in Patent Document 3 includes a tilt detection sensor mounted on a pile portion that is driven into the ground, and thus has a large number of parts and is complicated to assemble.

  Accordingly, an object of the present invention is to provide a surface layer abnormality sensing device that can reliably detect the collapse of an inclined surface and a method for installing the same, although it has a simple structure.

  The surface layer abnormality detection device of the present invention includes a hollow pile portion that is a first electrode portion driven into an inclined surface, and a detection portion provided inside the pile portion, and the detection portion is provided on the pile portion. A contact portion serving as a second electrode portion that comes into contact with and communicates with an inner wall surface, and a support portion that supports the contact portion in a state of extending in the vertical direction.

  According to the surface layer abnormality sensing device of the present invention, when the hollow pile portion to be driven into the inclined surface is inclined, the contact portion supported in a state of being extended in the vertical direction by the support portion is brought into contact to be conducted. Therefore, by setting the pile portion as the first electrode portion and the contact portion as the second electrode portion, the inclined surface is shifted depending on whether the first electrode portion and the second electrode portion are in a short-circuited state or an open state. It is possible to sense that the part is inclined. Since the pile part which the contact part used as a 2nd electrode part contacts also serves as a 1st electrode part, it can be set as a simple structure and can be produced easily.

  The support portion may include a spherical portion from which the contact portion protrudes downward, and a sphere carrier portion that rotatably supports an arc surface of the spherical portion. Since the spherical support portion rotatably supports the spherical portion that protrudes the contact portion downward, the contact portion can be brought into contact with the pile portion when the pile portion is inclined.

  The said pile part shall be provided with the pile main body which is formed in a cylinder shape, and the upper and lower ends are an open state, and the cover part which covers an upper end. By making the pile body cylindrical with the upper and lower ends open, even if the peripheral wall of the vertical hole collapses when embedding the pile body along the vertical hole formed in the inclined surface, the pile body can be A drilling machine can be inserted and the collapsed soil can be discharged through the pile body.

  The opening edge part of the lower end of the said pile part can be formed so that a pipe | tube thickness may become thin gradually as it goes to a lower end. When embedding the pile portion, the lower end of the pile portion can be smoothly embedded in the inclined surface.

  When a notification device is transmitted that wirelessly communicates a notification that the pile portion is tilted when contact between the pile portion and the contact portion is detected, the supervisor is located at a remote location from the inclined surface. However, it is possible to recognize the collapse of the inclined surface.

  Even if the surface layer abnormality sensing device of the present invention is installed in a remote mountainous area where power distribution cannot be obtained by a power company when power is supplied from a power supply device by solar power generation, the notification device is installed. Since the notification device can obtain power from a power supply device using solar power generation, the observer can monitor the inclined surface.

  The method for installing the surface layer abnormality sensing device of the present invention comprises the steps of excavating a vertical hole in the vertical direction on the inclined surface and the step of embedding the pile portion along the vertical hole when constructing the surface layer abnormality detection device of the present invention. It is characterized by including.

  According to the installation method of the surface layer abnormality detection device of the present invention, the pile main body can be embedded straight without being disturbed by pebbles or the like by embedding the pile main body along the vertical hole excavated along the vertical direction. Since it can, verticality can be secured.

When embedding the pile portion along the vertical hole, if the peripheral wall surface of the vertical hole collapses, a cylindrical shape is formed, and a drilling machine is inserted into the pile body with the upper and lower ends open, and the collapsed soil is excavated. And the process of repairing the surrounding wall surface of the said vertical hole can be included.
Since the upper and lower ends of the pile body are formed in an open cylindrical shape, the drilling machine can be inserted into the pile body and the vertical hole whose peripheral wall surface has collapsed can be repaired. The pile body can be continued without being pulled out, and the verticality of the pile body can be secured.

  According to the surface layer abnormality sensing device of the present invention, the pile portion that contacts the contact portion that becomes the second electrode portion also serves as the first electrode portion, so that the collapse of the inclined surface can be reliably detected, and the simple structure Can be easily manufactured.

It is a figure for demonstrating the structure of the surface layer abnormality detection apparatus which concerns on embodiment of this invention. It is sectional drawing of the pile for a detection of the surface layer abnormality detection apparatus shown in FIG. It is an upper part expanded sectional view of the pile for detection shown in FIG. It is a lower part expanded sectional view of the pile for detection shown in FIG. (A)-(C) are the figures for demonstrating each process of the installation method of the pile for a detection in the surface layer abnormality detection apparatus shown in FIG. (A)-(C) are the figures for demonstrating a process when the surrounding wall surface of a vertical hole collapses, when installing the pile for a detection in the surface layer abnormality detection apparatus shown in FIG. It is sectional drawing of the state in which the pile for detection of the surface layer abnormality detection apparatus shown in FIG. 1 inclined.

A surface abnormality sensing device according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the surface layer abnormality sensing device 10 senses the movement when the surface layer of the inclined surface is displaced or the surface layer or the deep layer is collapsed.
In the present embodiment, the surface layer abnormality sensing device 10 is disposed on an inclined surface on which a steel tower over which a transmission / distribution line is installed is installed. Since the surface layer abnormality detection device 10 can detect a slight movement of the surface layer of the inclined surface, it can detect that the steel tower may collapse before the surface layer collapse, and can take a precaution.

The surface layer abnormality detection device 10 includes a detection pile 11 including a hollow pile portion 20 that is a first electrode portion driven into an inclined surface, and a detection portion 30 provided inside the pile portion 20.
The pile portion 20 includes a pile body 21 embedded in the inclined surface and a lid portion 22 covering the upper end 21t of the pile body 21.

The pile body 21 is formed in a cylindrical shape (cylindrical shape) having the same tube diameter from the upper end 21t to the lower end 21b, and the upper end 21t and the lower end 21b are in an open state. The pile body 21 can be a steel pipe. For example, the pile main body 21 having an outer diameter of about 50 mm to 70 mm and a length of about 1 m to 3 m can be used. A wiring L2 is connected to the pile body 21.
As shown in FIG. 3, the pile main body 21 is formed so that the pipe thickness of the opening edge portion 21m gradually becomes thinner toward the lower end 21b. In the present embodiment, the outer peripheral surface side of the opening edge portion 21m is cut to form an inclined surface in which the outer peripheral surface side is inclined toward the center.

  As shown in FIG. 2, the cover part 22 is formed in the cylinder shape in which the ceiling surface was formed. Since the inner diameter of the lid portion 22 is formed to be substantially the same as the outer diameter of the pile body 21, the lid portion 22 can be covered with the pile body 21 with almost no gap.

The detection unit 30 includes a contact unit 31 serving as a second electrode unit that comes into contact with the inner wall surface 21s of the pile unit 20 and a support unit 32 that supports the contact unit 31 in a state of extending in the vertical direction F1. Yes.
The contact portion 31 is formed of a conductive metal rod. In the present embodiment, the contact portion 31 is made of an aluminum rod having a length of about 0.5 m to 1 m and high corrosion resistance.
A wiring L1 is connected to the upper part 31u of the contact part 31.

The support portion 32 is provided on the upper end 21 t of the pile body 21. The support portion 32 includes a spherical portion 321 from which the contact portion 31 protrudes downward, and a sphere support portion 322 that rotatably supports the arc surface of the spherical portion 321.
The spherical portion 321 is penetrated by the contact portion 31. The spherical surface portion 321 may be made of metal or resin. In the present embodiment, the spherical surface portion 321 is a sphere, but the lower half that bulges downward may be a spherical hemisphere.
The ball carrier 322 is covered with the lid 22 in a state where the ball carrier 322 is attached to the upper end 21 t of the pile body 21. The sphere carrier 322 includes a circular carrier plate 3221 that carries the spherical surface portion 321 and a standing wall 3222 that supports the carrier plate 3221. The sphere carrier 322 is formed of an insulator.

A through hole 3221 a for supporting the spherical surface 321 and inserting the contact portion 31 is formed in the support plate 3221 at the center portion serving as the axial position of the pile portion 20.
In the through hole 3221a, the peripheral wall surface is formed as an upward inclined surface so that the opening area gradually increases as it goes upward.
The standing wall portion 3222 is formed in a cylindrical shape and extends upward from the upper end of the pile body 21. As for the standing wall part 3222, the outer peripheral end surface 3221b of the supporting plate 3221 is connected to the inner wall surface 3222a. In the standing wall portion 3222, an annular notch portion 3222 c is formed in order to fit the lower portion 3222 b from the upper end 21 t of the pile body 21.

As shown in FIG. 4, the surface abnormality sensing device 10 includes a wiring L2 from the pile portion 20 (pile main body 21) that functions as the first electrode and a wiring L1 from the contact portion 31 that functions as the second electrode. A notification device 40 to be connected is provided.
The notification device 40 has a function of transmitting a notification that the pile portion 20 is tilted by wireless communication when detecting a short circuit state between the wiring L1 and the wiring L2.
This notification can be SMS (short message service) to the mobile phone T or a voice message to the telephone line. The notification may be an e-mail to the Internet.

The power supply of the notification device 40 is connected to the power supply device 50.
The power supply device 50 includes a photovoltaic power generation panel 51, a charge / discharge control device 52, an inverter 53, and a storage battery 54.
Although the size of the solar power generation panel 51 can be selected as appropriate, a small size of about 25 cm square shape is used in the present embodiment.
The charge / discharge control device 52 receives electric power from the solar power generation panel 51 and outputs the electric power to the inverter 53, supplies a charging current to the storage battery 54, or from the storage battery 54 when the electric power from the solar power generation panel 51 is insufficient. Or a current output to the inverter 53.
The inverter 53 has a function of converting the direct current from the charge / discharge control device 52 into alternating current and outputting the alternating current to the notification device 40.

The operation and use state of the surface abnormality sensing device 10 according to the embodiment of the present invention configured as described above will be described with reference to the drawings.
As shown in FIG. 5A, first, a vertical hole S1 having a slightly smaller diameter than the pile body 21 is excavated in the inclined surface S. This vertical hole S1 is a deep hole so that the upper part of the pile main body 21 comes out on the ground.
And as shown in FIG.5 (B), the position of the lower end 21b of the pile main body 21 is aligned with the hole edge of this vertical hole S1, and the upper end 21t of the pile main body 21 is struck with a hammer etc., A pile along the vertical hole S1 The main body 21 is embedded.

If there is no vertical hole S1, when embedding the pile main body 21 in the vertical direction F1, there is a pebble on the surface layer forming the inclined surface S, and if the lower end 21b of the pile main body 21 comes into contact with this pebble, it will be bent and embedded. The verticality cannot be secured.
However, by embedding the pile main body 21 along the vertical hole S1 excavated along the vertical direction F1, the pile main body 21 can be embedded straight without being disturbed by pebbles or the like, thus ensuring verticality. be able to.

Since the pile main body 21 is formed so that the pipe thickness of the opening edge 21m gradually decreases toward the lower end 21b, the pile main body 21 can be dug while cutting the peripheral wall surface of the vertical hole S1 by the lower end 21b of the pile main body 21. Therefore, it can be embedded smoothly.
Moreover, since the inclined surface of the opening edge portion 21m is formed by cutting the outer peripheral surface side, the processing is easier than cutting the inner peripheral surface side.

If the pile main body 21 is embedded straight in the inclined surface S, as shown in FIG. 5 (C), the spherical portion 321 to which the contact portion 31 is attached is disposed after the ball support portion 322 is disposed at the upper end 21t of the pile main body 21. The contact portion 31 is inserted through the through hole 3221a of the carrier plate 3221.
And if the cover part 22 is covered on the pile main body 21, installation of the pile 11 for a detection is completion.

As shown in FIG. 6 (A), when the embedding of the pile main body 21 is advanced, the peripheral wall surface S2 of the vertical hole S1 may collapse in the middle, and the vertical hole S1 may be filled with soil.
At that time, a drilling machine called a core drill D is inserted from the opening at the upper end 21t of the pile body 21 toward the opening at the lower end 21b. Then, the collapsed soil is excavated by the core drill D to repair the vertical hole S1 in which the peripheral wall surface S2 has collapsed.
If the collapsed soil is scraped, the upper end 21t of the pile main body 21 is hit with a hammer or the like, and the pile main body 21 is embedded along the vertical hole S1.
5C, as shown in FIG. 6C, if the contact portion 31 is arranged together with the spherical surface portion 321 and the cover portion 22 is covered, the detection pile 11 is installed. Can be completed.

  In this way, the upper end 21t and the lower end 21b of the pile body 21 are formed in an open cylindrical shape, so that the core drill D is inserted into the pile body 21 and the vertical hole S1 in which the peripheral wall surface S2 has collapsed is repaired. Therefore, the embedding work of the pile main body 21 can be continued without pulling out the pile main body 21, and the verticality of the pile main body 21 can be ensured.

  As shown in FIG. 1, in the initial state where the pile portion 20 is driven in the inclined surface S along the vertical direction F <b> 1, the contact portion 31 also hangs down along the vertical direction F <b> 1. 21 is in a non-contact state.

For example, it is assumed that a surface layer collapse or a deep layer collapse occurs on the inclined surface S. Then, the detection pile 11 is inclined with respect to the vertical direction F1, as shown in FIG.
Although the pile part 20 inclines with the inclined surface S, since the support part 32 supports the contact part 31 in the state which suspended the contact part 31 to the perpendicular direction F1, the original attitude | position is maintained.
This state will be described in more detail. As the pile portion 20 is inclined, the standing wall portion 3222 and the supporting plate 3221 are inclined, but the spherical surface portion 321 is formed on the supporting plate 3221, and the peripheral wall surface is inclined upward so that the opening area gradually increases toward the upper side. It is carried in a through hole 3221a formed on the surface. Therefore, due to the weight of the contact portion 31, the spherical portion 321 rotates in the through hole 3221a while being supported by the through hole 3221a in a state where the contact portion 31 extends in the vertical direction F1. By doing so, the contact part 31 is maintained in the initial posture of hanging along the vertical direction F1.

In the state where the contact portion 31 extends in the vertical direction F <b> 1, the initial posture is maintained and the pile portion 20 is inclined, so the contact portion 31 contacts the inner wall surface 21 s of the pile portion 20.
By this contact, the wiring L1 from the pile main body 21 and the wiring L2 from the contact portion 31 are short-circuited.
In the notification device 40 shown in FIG. 4, it is detected that the wiring L1 and the wiring L2 are short-circuited, and the inclined surface S is collapsed by the SMS to the mobile phone T through the base station of the mobile phone company. Be notified. By this notification, the monitor can recognize the collapse of the inclined surface S even if the observer is located at a remote location from the inclined surface S.

The notification device 40 is operated by the power supply from the power supply device 50. In the power supply device 50, the photovoltaic power generation panel 51 outputs electric power generated by receiving sunlight to the inverter 53. Further, the charge / discharge control device 52 generates a stable charging current to charge the storage battery 54. When the power generated by the solar power generation panel 51 is insufficient to operate the notification device 40, the current from the storage battery 54 is output to the inverter 53.
In the inverter 53, the direct current from the charge / discharge control device 52 is converted into alternating current and supplied to the notification device 40.

  As described above, since the power supply device 50 is operated by photovoltaic power generation by the photovoltaic power generation panel 51, the surface layer abnormality sensing device 10 is installed in a remote mountainous area where power distribution cannot be obtained by the power company. However, the inclined surface S can be monitored by the surface layer abnormality sensing device 10.

As described above, according to the surface layer abnormality sensing device 10 according to the present embodiment, when the hollow pile portion 20 driven into the inclined surface S is inclined, the contact supported by the support portion 32 in a state of extending in the vertical direction F1. The part 31 conducts by contacting the pile main body 21 of the pile part 20.
Therefore, by setting the pile main body 21 as the first electrode portion and the contact portion 31 as the second electrode portion, the inclined surface S depends on whether the first electrode portion and the second electrode portion are in a short-circuited state or an open state. It is possible to detect the displacement and the inclination of the pile portion 20. When the pile portion 20 also serves as the first electrode portion, a simple structure can be obtained and the first electrode portion can be easily manufactured. Therefore, although the pile 11 for detection of the surface layer abnormality detection apparatus 10 is a simple structure, it can detect collapse of the inclined surface S reliably.

  Moreover, since the pile main body 21 which functions as a 1st electrode part can be lengthened according to the embedding depth, the contact part 31 can also be lengthened according to the length of the pile main body 21. FIG. Therefore, by increasing the length of the contact portion 31, if the pipe diameter of the pile body 21 is the same, the sensitivity to inclination can be increased as compared with the case where the length of the contact portion 31 is short.

  According to the present invention, since the collapse of the inclined surface can be detected, it is suitable for the slope affected by the collapse. In particular, if the product of the present invention is placed on an inclined surface on which a steel tower with an overhead transmission / distribution line is installed, the movement of the surface layer can be detected before the surface layer of the inclined surface collapses and the steel tower collapses. Ideal for steel tower protection.

DESCRIPTION OF SYMBOLS 10 Surface layer abnormality detection apparatus 11 Pile for detection 20 Pile part 21 Pile main body 21s Inner wall surface 21t Upper end 21b Lower end 21m Opening edge part 22 Lid part 30 Detection part 31 Contact part 31u Upper part 32 Support part 321 Spherical part 322 Sphere support part 3221 Supporting plate 3221a Through-hole 3221b Outer peripheral end surface 3222 Standing wall portion 3222a Inner wall surface 3222b Lower portion 3222c Notch 40 Notification device 50 Power supply device 51 Photovoltaic panel 52 Charge / discharge control device 53 Inverter 54 Storage battery F1 Axis direction S Inclined surface S1 Vertical hole S2 mobile phone

Claims (8)

A hollow pile portion that is the first electrode portion driven into the inclined surface, and a detection portion provided inside the pile portion,
The detection unit includes a contact part serving as a second electrode part that comes into contact with the inner wall surface of the pile part and a support part that supports the contact part in a state of extending in the vertical direction. .   2. The surface layer abnormality sensing device according to claim 1, wherein the support portion includes a spherical surface portion in which the contact portion protrudes downward, and a sphere carrier portion that rotatably supports an arc surface of the spherical portion.   The surface layer abnormality sensing device according to claim 1, wherein the pile portion is formed in a cylindrical shape, and includes a pile body whose upper and lower ends are open and a lid portion that covers the upper end.   The surface layer abnormality sensing device according to claim 3, wherein the opening edge portion at the lower end of the pile portion is formed so that the tube thickness gradually decreases toward the lower end.   The surface layer abnormality detection according to any one of claims 1 to 4, further comprising a notification device that transmits a notification that the pile portion is tilted by wireless communication when contact between the pile portion and the contact portion is detected. apparatus.   The surface layer abnormality detection device according to claim 5, wherein the notification device is supplied with power from a power supply device using solar power generation. When constructing the surface abnormality sensing device according to any one of claims 1 to 6,
Drilling a vertical hole in the vertical direction on the inclined surface;
A method of installing a surface layer abnormality sensing device including a step of embedding the pile portion along the vertical hole.   When embedding the pile portion along the vertical hole, if the peripheral wall surface of the vertical hole collapses, a cylindrical shape is formed, and a drilling machine is inserted into the pile body with the upper and lower ends open, and the collapsed soil is excavated. And the installation method of the surface layer abnormality detection apparatus of Claim 7 including the process of repairing the surrounding wall surface of the said vertical hole.

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