JPH09257527A - Landslide measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a landslide measuring device with the simple structure at a low cost, which can measure the movement of the ground forecasting the generation of landslide and which can immediately generate an alarm at the time of danger. SOLUTION: A pointer mark 13 is fitted to at least one measuring wire 12, which can moved through inside of a measuring box main body 10, and a scale display unit 14 is arranged along the measuring wire 12 so as to obtain the displaced variable of the movement of the mark 13 inside of the measuring box main body 10. One end of the measuring wire 12 is connected to one end of a detecting wire 15, of which the other end is fixed to the ground 1 forecasting the generation of landslide. The other end of the measuring wire 12 is connected to one end of a delivery wire 17 stretched by the tensile force at the other end thereof on the ground 3, in which the generation of landslide is not forecasted. Furthermore, the measuring box main body 10 can be observed from outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landslide measuring device, and in particular, at a work site where a ground is excavated and a predetermined structure is constructed, a landslide caused on an unstable slope can be found early and can be quickly provided. The present invention relates to a device that can be suitably used as a landslide measuring device that can cope with the situation.

[0002]

2. Description of the Related Art In order to detect signs of landslides at an early stage,
Conventionally, a landslide measuring device as illustrated in FIG. 6 has been used. This landslide measuring device is installed on a bar body 2 driven into the shoulder of a slope 8 which is the ground surface 1 in which the occurrence of landslide is predicted in the direction shown by the arrow 9, and on the ground surface 3 where the occurrence of landslide is not predicted. A landslide meter 4, a drum 5 provided inside the landslide meter 4, which also functions as a recorder, and a rod 2 at one end.
And one end of the steel strip 6 which is connected to the other end and is wound around the drum 5 which also serves as a recording device and which is applied with a predetermined tensile force.

When an abnormality occurs due to landslide on the surface 1 where landslide is predicted to occur, the rod 2 driven into the surface 1 moves, the steel strip 6 is fed out from the drum 5 which also serves as a recorder, and the amount of feeding out. Is measured and the amount of feeding is recorded together with the date and time when the abnormality occurred.

[0004]

In the conventional landslide measuring device as described above, the structure of the drum that also serves as the recorder is complicated, and it is inevitable that the drum is expensive. Therefore, the number of installed landslide measuring devices is restricted from the viewpoint of installation cost, and a sufficient landslide observation system is not established, which is a safety problem.

An object of the present invention is to provide a landslide measuring device having a simple structure and a low cost, which is capable of measuring the movement of the surface of the earth where the occurrence of a landslide is predicted and issuing an alarm immediately when a dangerous situation occurs. is there.

[0006]

The present invention is a landslide measuring device, which has the following structure in order to solve the above-mentioned technical problems. That is, the present invention provides a measurement box body, at least one movable measurement wire portion that passes through the measurement box body, a pointer mark attached to the measurement wire portion, and the inside of the measurement box body. At one end of the measurement wire portion that is configured with a scale display portion arranged along the measurement wire portion to obtain the displacement amount of the mark attached to the measurement wire portion, and that passes through the inside of the measurement box body. , Is connected to the other end of the detection wire part whose one end is fixed to the ground surface where the occurrence of landslide is predicted, and the other end of the measurement wire part is fed out while applying tensile force to one end on the ground surface where the occurrence of landslide is not predicted It is connected to the other end of a possible feeding wire portion so that the inside of the measurement box body can be seen at least from the outside. That.

The detecting wire portion, the measuring wire portion and the payout wire portion are preferably formed of steel strips. However, instead of steel strip, if the material has a small expansion coefficient and is not easily affected by temperature, the wire should be formed from an appropriate material such as non-ferrous metal material or synthetic resin reinforced with glass fiber or carbon fiber. You can also Further, in order to apply a pulling force to the payout wire portion, it is preferable to use a weight because the structure is simple, but in addition, a winding drum of the wire portion, a tension coil spring, or the like can be used as appropriate. .

Further, the detecting wire portion, the measuring wire portion, and the feeding wire portion are formed of a single continuous steel strip. Further, a part or all of the upper part of the measurement box body is a lid that can be opened and closed.

At least a part of the upper portion of the measuring box body is formed of a transparent plate through which the inside can be seen. Furthermore, the measuring box body is further provided with a detection unit for generating an electric signal according to a predetermined displacement amount of the measurement wire unit, and an alarm is issued by the electric signal generated by the detection unit. Characterize.

In the detection section, it is preferable to detect a predetermined amount of mutation in the measurement wire section by a limit switch. However, it is also possible to use a photoelectric switch or a proximity switch. In addition to the case where the alarm unit is directly energized as an electric signal, it is also possible to cause the detection unit to output a radio wave of a specific frequency, and the alarm unit can receive the radio wave and issue an alarm. As the alarm, an appropriate one such as lighting a red lamp or ringing a siren or a buzzer can be used.

According to the landslide measuring device of the present invention, when a landslide occurs, the watcher reads the indicator mark attached to the detection wire portion and the scale display portion arranged along the measurement wire portion, and the previous measurement value is obtained. By comparing with
You can easily understand the occurrence state of landslides.

Further, if an electric signal is generated from the detection unit according to the amount of displacement of the measurement wire unit and an alarm is issued by this electric signal, the occurrence of landslide can be quickly notified to the operator, and an accident Occurrence is reliably prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The landslide measuring device of the present invention will be described below in more detail with reference to the embodiments shown in the drawings. 1 and 2 schematically show a landslide measuring device according to an embodiment of the present invention. That is, the measurement box 1 is placed on the table 7 provided on the surface 3 where landslide is not expected to occur.
0 is placed. This measurement box 10 is shown in FIG.
A measurement box body 10 as shown in FIG. 4, and an openable / closable lid 1 attached to the upper portion of the measurement box body 10.
0a and 0a. A glass plate 11 is attached to the lid 10a so that the inside of the measurement box body 10 can be seen through from the outside.

FIG. 3 shows a case where two measuring wire portions 12 which are steel strips are inserted into the measuring box body 10, and each measuring wire portion 12 moves inside the measuring box body 10. Is able to.
The measuring wire portion 12 is provided with a mark 13 for a pointer. In the present embodiment, the wire 13 having an appropriate length is held between the measurement wire portions 12 to form the pointer mark 13.

Further, in the measuring box body 10, in order to obtain the moving displacement amount of the pointer mark 13 attached to the measuring wire portion 12 as described above, each measuring wire portion 1
A scale display unit 14 is arranged along the line 2. In addition,
The scale display unit 14 can use a ready-made scale. In this embodiment, a tape measure is used.

As shown in FIG. 2, the measuring wire portion 12 is provided at the tips of two rods 2 which are erected on the ground surface 1 (shoulder of the slope 8 in this embodiment) where landslide is predicted to occur. It is connected to the detection wire portion 15 having one end fixed. Two measurement wire parts 12 connected to the detection wire part 15
Passes through the common measurement box body 10 via a plurality of guide rollers 22 provided on the ground surface.

Further, the other end of the measuring wire portion 12 is connected to the feeding wire portion 17 to which a pulling force is applied on the ground surface 3 where the occurrence of landslide is not expected, and the measuring wire portion 12, the detection wire portion 15, and the feeding wire portion. 17 is formed by one continuous steel strip.

A weight 16 is attached to the open end of each pay-out wire portion 17, and is supported by a pulley 20 erected on the ground surface 3 where landslide is not expected to occur, and a pulling force is applied thereto.

Further, a limit switch 18 as a detector for emitting an electric signal according to a predetermined displacement amount of the measuring wire portion 12 is installed in the measuring box body 10 in correspondence with each measuring wire portion 12. Measuring wire part 12
Has a protrusion 21 attached at a predetermined position. The protrusion 21 hits the limit switch 18 when the measurement wire portion 12 reaches a predetermined displacement amount, and closes the contact of the circuit, as illustrated in FIG. As described above, an alarm is issued by blinking a red lamp 23 as an alarm generating device.

Next, the operation of the landslide measuring device according to this embodiment will be described. As shown in FIGS. 1 and 2,
A plurality of rods 2 are erected on the ground surface 1, where shoulders of the slope 8 are predicted to occur. One end of the detection wire portion 15 is fixed to the rod body 2. A guide roller 22 provided with the measurement wire portion 12 connected to the detection wire portion 15 on the ground surface
Then, the measurement box main body 10 as shown in FIG. Measurement wire part 1 which passed measurement box 10
The weight 16 is attached to the pay-out wire portion 17 connected to 2. A pulling force is applied to the pay-out wire portion 17 so that the pay-out wire portion 17 can be paid out.

When a landslide occurs, the rod 2 moves and the detection wire portion 15 moves. At that time, the payout wire part 17 is paid out, and the measurement wire part 12 moves to the left side in the drawings as shown by an arrow A in FIGS. The amount of movement of the measuring wire portion 12 is clearly shown by the pointer mark 13 and the scale display portion 14.

That is, the measurement box body 10 is regularly
The landslide condition can be clearly understood by measuring and measuring each time, and recording the measured value each time, and comparing the measured value of this time with the recorded value of the previous time. With this observation result, we can increase the frequency of observation of places where there is a danger of large-scale landslides,
Alternatively, take measures to prevent landslides, such as immediately stopping the work.

As shown in FIG. 3, when the measurement wire portion 12 is provided with a protrusion 21 and further a limit switch 18 is provided as a detection portion, the protrusion 21 is the limit switch 1.
8 is tapped to close the contacts of the circuit, an alarm is issued from the alarm generator 23, and the work is immediately stopped to prevent an accident from occurring.

In the above-mentioned embodiment, the example in which the number of measurement wire portions is two has been described, but the number of measurement wire portions is not limited, and a large number of measurement pieces can be measured in one measurement box body. You can also pass the wire part.

[0025]

As described above, the landslide measuring device of the present invention has one end connected to the detection wire portion whose one end is fixed to the ground surface where the occurrence of landslide is predicted, and the other end is the ground surface where the landslide is not predicted. At least one measurement wire part connected to a payout wire part that can be drawn out while giving a pulling force to one end is inserted through the measurement box body so that it can pass through, and a pointer mark attached to the measurement wire part, Despite the simple structure of providing a scale display section arranged along the measurement wire section, the amount of displacement of the measurement wire section due to the occurrence of a landslide can be easily known from the outside, and Prices have fallen sharply.

Therefore, it becomes possible to observe the surface of the earth where landslides are predicted to occur without omission and at low cost. Moreover, since one measurement box can pass multiple measurement wire parts, it is only necessary to prepare a small number of measurement box bodies in comparison with the number of measurement points, and the installation of a landslide measuring device. Became much easier.

In addition, an alarm can be generated by an electric signal generated by a detection unit that generates an electric signal according to a predetermined displacement amount of the measuring wire unit, so that landslide can be dealt with urgently. became.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an embodiment of a landslide measuring device according to the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a front view of a measurement box used in this embodiment.

4 is a side view of the measurement box of FIG.

FIG. 5 shows an example of a circuit for generating an electric signal for issuing an alarm.

FIG. 6 is a side view showing an outline of a conventional landslide measuring device.

[Explanation of symbols]

 1 Landslide is predicted but ground is not predicted 3 Landslide is not predicted 10 Measurement box body 10a Measurement box body lid 11 Transparent plate 12 Measurement wire section 13 Indicator mark 14 Scale indicator section 15 Detection wire section 17 Feeding wire section 18 Detection section 23 Alarm generator

Claims (5)

[Claims] 1. A measuring box body, at least one movable measuring wire portion passing through the measuring box body, a pointer mark attached to the measuring wire portion, and It is composed of a scale display section arranged along the measurement wire section in order to obtain a displacement amount of the mark attached to the measurement wire section, and one end of the measurement wire section passing through the measurement box body is , Connect one end to the other end of the detection wire part where one end is fixed to the surface where landslide is expected to occur, and the other end of the measurement wire part can be extended while applying tensile force to one end on the surface where landslide is not expected to occur A ground wire connected to the other end of the feeding wire part so that the inside of the measurement box body can be seen at least from the outside. Ri measuring device. 2. The landslide measuring device according to claim 1, wherein the detection wire portion, the measurement wire portion, and the payout wire portion are formed of one continuous steel strip. 3. The landslide measuring device according to claim 1, wherein a part or all of an upper portion of the measurement box body is a lid that can be opened and closed. 4. The landslide measuring device according to claim 1, wherein at least a part of an upper portion of the measuring box body is formed of a transparent plate that allows the inside to be seen through. 5. The measuring box body is further provided with a detecting section for generating an electric signal according to a predetermined displacement amount of the measuring wire section, and an alarm is issued by the electric signal generated by the detecting section. The landslide measuring device according to claim 1, 2, 3, or 4.