JP2011220959A - Wall surface shape measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple device capable of measuring deformation of a wall surface.SOLUTION: A wall surface shape measuring device comprises: at least two guide-wires; a sensor base provided with as many through holes as the number of guide-wires; an anchor attached to lower ends of guide-wires; a lifting cable hanging down the sensor base; and a guide member loaded with sheaves to wind the guide-wires and the lifting cable. The sensor base is attached with a distance sensor.

Description

  The present invention relates to a wall surface shape measuring apparatus.

In the embankment where the divided panels are stacked vertically rather than the concrete retaining wall made of concrete, the entire embankment behaves flexibly, so it has excellent seismic resistance and is safe against many earthquakes so far. Have shown.
However, how much this earthquake resistance is quantitative has not yet been obtained.
In order to evaluate seismic resistance, it is necessary to analyze the measured data on how the reinforced soil responded to the generated ground motion and, as a result, how the reinforced soil wall deformed. It is caused by the fact that it did not come.
The reason why the field measurement has not been performed is that such a way of thinking has been unnecessary and the measurement itself was difficult.

JP 2008-45890 A.

The latter will be explained. In order to measure the planar deformation (unevenness) of the vertical reinforced soil wall, if the wall height is less than about 3 m, it can be easily performed visually with a downward swing and a ruler.
However, if the wall height is 3 m or more, it will not be possible to apply a ruler at any place.
Therefore, a transit or a three-dimensional light wave surveying instrument must be used. However, the transit and the light wave surveying instrument are complicated to handle and the equipment itself is expensive, so the measurement is not easy.
Furthermore, it is necessary to set a target on the wall surface to be measured, but such preparation before measurement is a difficult task. (Patent Document 1)
In addition, when measuring with these surveying instruments, there are many cases where there are obstacles such as trees on the front of the wall, or there are slopes on the front side of the wall and it is not possible to install a measuring instrument, which makes measurement extremely difficult. .

  In order to solve the above-described problems, the wall surface shape measuring apparatus of the present invention includes at least two guide wires, a sensor base having through holes as many as the number of guide wires, and an anchor attached to the lower end of the guide wire. The sensor base is composed of a lift cable for hanging the sensor base and a guide material on which a sheave for winding the guide wire or the lift cable is mounted, and the sensor base is a member for attaching a distance sensor.

Since the wall surface shape measuring apparatus of the present invention is as described above, the following effects can be obtained.
<1> It is extremely economical because anyone can measure with a simple device without using expensive and complicated equipment.
<2> Since the device is only hung from the upper end of the wall surface, the wall surface can be measured even if there are many vegetation on the front surface of the retaining wall or the scaffolding on the front surface of the retaining wall is bad.
<3> The operation of installing the target on the wall surface to be measured is unnecessary, and even an existing wall surface can be easily measured.

Explanatory drawing of the use condition of the wall surface shape measuring apparatus of this invention. Explanatory drawing of the Example of a sensor stand.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

<1> Overall configuration.
The wall surface shape measuring apparatus of the present invention is constituted by a guide wire 1, a lifting cable 2, a sensor base 3, an anchor, a drum for winding the guide wire 1 and the lifting cable 2, and the like.

<2> Guide material 4.
The guide material 4 that supports the entire apparatus uses a steel material such as H steel.
If this guide material 4 is attached to an automobile or other cart or mount via a rotating shaft, the guide material 4 can be projected into the air so as to turn the hands of the watch.
Or it can also comprise as a member extended in multiple steps like the tripod of a camera.

<3> Guide wire.
The guide wire 1 is a wire that serves as a guide for raising and lowering a distance sensor 5 described later.
Therefore, at least two guide wires 1 are required.
The two guide wires 1 are suspended along the wall surface through a sheave of a guide material 4 that extends horizontally from the upper end of the wall surface into the air.

<4> Wire anchor.
An integral wire anchor 6 is attached to the lower ends of the plurality of guide wires 1.
This is a weight body that gives the guide wire 1 a weight in the vertical direction.
A pin or the like is provided on the lower surface of the wire anchor 6 so as to project downward, and the pin 61 is digged into the ground to maintain the guide wire 1 in a vertical state.

<5> Sensor stand.
The sensor base 3 is a member on which a commercially available distance sensor 5 or the like is mounted or attached.
A part of the sensor base 3 is provided with through holes 31 in the vertical direction at the position corresponding to the position of the guide wire 1 by the number of the guide wires 1.
By passing the guide wire 1 through the through hole 31, the sensor base 3 can be raised and lowered while being guided by the guide wire 1.

<6> Lift cable.
The lifting cable 2 is attached to the sensor base 3.
The lifting cable 2 is a cable for hanging or lifting the sensor base 3 along the guide wire 1, but it can also serve as a signal line.
The signal sent by the signal line is the distance data measured by the distance sensor 5.
Further, the lifting cable 2 is provided with a scale so that the position of the suspended sensor base 3 can be seen.

<7> Sieves.
In order to suspend or lift the guide wire 1 and the lifting cable 2, a plurality of wire sheaves 73 and cable sheaves 74 corresponding to the number of guide wires 1 are attached to the guide material 4.
Via the sheaves 73 and 74, the direction of the guide wire 1 and the lifting cable 2 can be changed from horizontal to vertical.
Further, a cable drum 71 for the lifting cable 2 and a wire drum 72 for the guide wire are installed on the guide material 4 or in a close position.
The lift cable 2 can be wound by the rotation of the cable drum 71, and the guide wire 1 can be wound or wound by the rotation of the wire drum 72.

<8> Projection of guide material.
Next, a method for using the apparatus of the present invention will be described.
First, the guide material 4 is projected from the upper part of the wall surface into the air.
As described above, the guide member 4 is provided with the sheave 74 for the lifting cable 2 and the sheave 73 for the guide wire 1, and these are located in the air on the wall surface.

<9> Hanging the guide wire.
In the embodiment, there are two, but the guide wire 1 is suspended downward along the wall surface via the sheave 73.
Since the wire anchor 6 is fixed to the lower end of the guide wire 1, the weight of the wire anchor 6 serves as a weight for swinging down to give the guide wire 1 verticality.
When the anchor 6 reaches the ground surface below the wall surface, a waiting worker inserts and fixes the pin 61 on the lower surface of the anchor 6 into the ground.

<10> Attaching the sensor base.
Next, the lifting cable 2 is hung with the sensor base 3 and the distance sensor 5 attached to the tip.
When the sensor base 3 reaches below the wall surface, the lower worker inserts the guide wire 1 into the through hole 31 of the sensor base 3.
Since the through hole 31 of the sensor base 3 continues to the outer surface of the base via the groove 32, the through hole 31 can be passed through the groove 32 through the guide wire 1.
The reason for lowering the elevating cable 2 to the lower part of the wall surface is that when the elevating cable 2 wound around the cable drum 71 is stretched as it is, it is twisted and rotated in the returning direction, so that it is used after the twist is released. .

<11> Measurement.
When the above preparation is completed, the cable drum 71 on the wall surface is rotated to gradually wind up the lifting cable 2.
Then, the sensor base 3 rises in a state in which the direction in plan view is regulated by the two guide wires 1.
In the process, the distance to the wall surface is measured by the distance sensor 5 attached to the sensor base 3.
Thus, since the direction of the planar view of the distance sensor 5 is regulated by the guide wire 1, there is a slight wind and the distance sensor 5 is not shaken.
Further, since the position of the guide wire 1 drooping vertically can be accurately grasped by the position of the sheave 73 for the wire, it is possible to measure an accurate distance from the reference vertical line to the wall surface.
Since the position of the distance sensor 5 in the vertical direction can be known from the scale marked on the elevating cable 2, the position in the height direction measured while pulling up the distance sensor 5 can also be accurately grasped.

1: Guide wire 2: Lift cable 3: Sensor base 4: Guide material 5: Distance sensor 6: Wire anchor

Claims (1)

At least two guide wires;
A sensor base with through holes as many as the number of guide wires,
An anchor attached to the lower end of the guide wire;
Elevating cable for hanging the sensor base,
It consists of a guide material equipped with a sheave to wind a guide wire and a lifting cable,
The sensor base is a member for attaching a distance sensor,
Wall shape measuring device.

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