JPS6217652A - Ultrasonic transmission apparatus - Google Patents

Abstract

PURPOSE:To make it possible to similarly inspect the pit and tunnel excavated in the ground and to dispense with complicated work, by transmitting an ultrasonic wave toward a rock bed in such a state that the hole of a transmitter is contacted with a wall surface under pressure. CONSTITUTION:An apparatus 2 is arranged in a tunnel 1 in such a state that the main body parts 2a, 2b thereof were united and a constant gap S is formed between a transmitter 6 and the ceiling surface of the tunnel 1. When high pressure water is supplied to the apparatus 2 by the operation of a pump 3, water flows in the lower parts of jacks 7, 10 to raise pistons 9, 12 and the main body part 2b is raised against the action forces of the compression springs 16, 20 of uniting members 30, 31 by the rising of said pistons 9, 12 and a gap S is formed between the main body parts 2a, 2b and the top part of a transmitter 6 is impinged to the ceiling surface of the tunnel 1. When the transmitter 6 is operated in this state, an ultrasonic wave advances through a rock bed 1a and is detected by a receiver and analyzed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sound wave transmitting device, particularly an ultrasonic transmitting device capable of performing a detection operation by pressing the transmitter against an object to be detected such as rock with great force. It is related to.

<Conventional technology> In order to detect the state of destruction and strain in rock beneath the earth, ultrasonic waves are transmitted toward the rock that is the object of examination, and the sound waves (hereinafter referred to as sound waves) that have passed through the rock are detected. A device for determining the condition of the rock mass has been proposed. In conventional types of such sound wave transmitting devices, water is filled in a vertical hole polled underground, the transmitting device is suspended in the vertical hole, and the transmitter is operated under this condition. 0 The transmitted ultrasonic waves travel through water, reach the bedrock, and proceed within the bedrock. This is captured and analyzed by the receiver.

<Problems to be solved by the invention> However, in such conventional ultrasonic transmitting devices, water is present between the transmitter and the rock, which causes severe energy attenuation. In order to receive reasonably reliable sound waves, the power of the transmitter must be increased, which requires a large amount of energy. Furthermore, since the hole needs to be filled with water, the holes in which the ultrasonic transmitter can be installed have been limited to vertical holes.

The present invention was made in view of these conventional problems, and its purpose is to eliminate the need to fill water in order to transmit ultrasonic waves, and therefore to allow installation even in sideways or upwardly facing holes. An object of the present invention is to provide an ultrasonic transmitting device capable of transmitting ultrasonic waves.

Means for Solving the Problems〉 In order to achieve the above object, the present invention provides a main body with a first and a second main body.
The main body is divided into two parts, and a transmitter is attached to one of the main parts.
Further, a disassembling member that acts in a direction to separate the main body parts, and a member for combining the open main body parts on the contrary, are disposed between the two main body parts, and the disassembly member is installed in the inspection hole, and The gist of the ultrasonic transmitting device is such that a main body portion to which a transmitter is attached is separated from the other main body portion by the operation of a dismantling member, and the transmitter is brought into pressure contact with the inner wall of a hole.

The dismantling member includes, for example, a jack operated by fluid supply, and the combining member includes, for example, an elastic member such as a spring interposed between the two main body portions.

<Operation> Excavation and formation of holes extending vertically, horizontally, or diagonally into the ground.
An ultrasonic transmitter is placed in this hole.

Then, by operating a dismantling device such as a jack in the hole, the two main body parts are disassembled, that is, separated from each other.

The open body portions are gradually pushed apart by the operation of the dismantling device, and eventually the transmitter attached to one of the body portions abuts against the inner wall of the hole. When the demolition member is then activated, the transmitter is pressed against the inner wall of the hole with a predetermined pressure, so when the transmitter is activated under this condition, the ultrasonic waves are directly transmitted from the wall of the hole into the rock. These are received and the received sound waves are analyzed to obtain predetermined data.

<Example> 1 to 5 are diagrams showing one embodiment of the present invention.

The ultrasonic transmitting device (hereinafter simply referred to as the ultrasonic device) 2 according to this embodiment uses a rod 4 in a horizontal hole 1 as shown in FIG. 1, or in a hole drilled vertically or diagonally. Pushed in and placed. One end of a water pressure hose 5 is connected to the ultrasonic device 2, and a water pressure pump 3 is connected to the other end to supply high pressure water (oil or other fluid may be used) to the ultrasonic device 2. It looks like this. As shown in FIGS. 2 and 3, the ultrasonic device 2 has a generally cylindrical external structure, and includes a first main body portion 2a lying on the ground within the horizontal hole 1, and a first main body portion 2a lying on the ground within the horizontal hole 1. It has a structure that complements the first main body part 2a and a second main body part that is combined with the first main body part 2a as a basic component. A transmitter 6 is embedded and fixed in the second main body portion 2b with its head projecting outward. Also the first and second
Between the main body parts 2a and 2b, there are holes 24.25 and 26.27 facing each other on both sides centering on the transmitter 6 mounting part.
are drilled in pairs, and jacks 7 and 10 as dismantling members are accommodated in these holes, respectively.

The jacks 7 and 10 operate in synchronization with each other and lift the second body part 2b upward relative to the first body part 2a, and are used to lift the pistons 9 and 12 and the O-rings 8 and 1, respectively.
Consists of 1. The jack 7.10 has a first main body part 2a.
from the hydraulic hose connection part 28 provided at the end of the first
A waterway 3 that extends into the main body 2a and branches off in the middle.
2, and high pressure water is supplied from a water pressure pump 3.

On the other hand, between the first and second main body parts 2a and 2b,
As in the case of Jacket 7.10 above, the main body portion 2a is open on both sides centering on the transmitter 6 mounting area.

A screw through hole 22.2 extends vertically through 2b in FIG.
3 is formed. These screw through holes 22.23 communicate at their lower ends with downwardly open housing holes 21.29 formed in the first main body portion 2a, and each screw through hole 22.23
Bolts 13, 17 reaching the receiving holes 21, 29 are inserted in each case so as to be able to move in a thrust direction. Each bolt 13
．． Nuts 14.18 are respectively tightened at the tips of the nuts 17, washers 15.19 are installed above these nuts 14.18, and washers 15.1
9 and the ceiling surface of the accommodation holes 21 and 29 is a washer 15.
．． 19 to push the bolt 13.17 downward. A compression spring 16, 20 is inserted in each case. and bolt 13.17 and nut 1 mentioned above.
4, 18, washers 15, 19 and compression springs 16, 20
This biases the second body part 2b towards the first body part 2a and forms a joining member 30.31 which joins the open body parts 2a, 2b together.

As shown in FIGS. 2 and 3, the ultrasonic device 2 having such a configuration is initially installed in the horizontal hole 1 with the first body portion 2a and the second body portion 2b combined. Ru. Therefore, a certain gap S is formed between the transmitter 6 and the ceiling surface of the horizontal hole 1.

When high-pressure water is supplied to the ultrasonic device by operating the water pressure pump 3 under this condition, the high-pressure water flows into the lower part of the jack 7.10 through the water channel in the first main body portion 2a, and the pistons 9, 12 to rise. As a result, the second main body portion 2b
is lifted against the force of the compression springs 16, 20 of the combined member 30, 31, and as shown in FIGS. vessel 6
The top of the hole hits the ceiling of horizontal hole 1 (Kai is the wall).

By operating the pistons 9 and 12 slightly more, the transmitter 6 is brought into contact with the ceiling surface of the horizontal hole 1 with a predetermined pressure. At this time, the compression spring 16.20 is in its most compressed state. When the transmitter 6 is turned on and activated with the transmitter 6 in pressure contact with the wall of the horizontal hole 1, an ultrasonic wave is emitted, and this ultrasonic wave is directly transmitted from the wall of the horizontal hole 1 to the bedrock 1a. It travels through bedrock 1a.

These emitted ultrasound waves are detected by a receiver and
It is analyzed according to a predetermined method. This receiver may be built into the ultrasonic device 2, or may be configured separately from the ultrasonic device 2, and after the hydration is completed, the water pressure pump 3 can be depressurized. The second main body portion 2b is pulled down by the restoring force of the compression springs 16 and 20, and is combined with the first main body portion 2a.

Note that in the above embodiment, a jack 7.10 is used as a dismantling member for separating the second main body part 2b from the first main body part 2a, and a spring device is used for the joining member 30.31. However, the configuration is not necessarily limited to this, and various member devices can be used as necessary.

<Effects of the Invention> As explained above, according to the present invention, the device itself has a two-part structure, and an ultrasonic transmitter is attached to the main body part which can be freely disassembled and combined. Because the ultrasonic waves are transmitted toward the rock while being pressed against the wall, inspections can be performed in both vertical and horizontal underground holes, without the need for the complicated work of filling the holes with water. This makes it possible to conduct bedrock surveys that do not require Further, various effects such as being able to reduce the output of the ultrasonic transmitter and lowering costs can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view schematically showing the usage state of the ultrasonic transmitter according to an embodiment of the present invention, and Fig. 2 is a side view schematically showing the state of the ultrasonic transmitter before operation. FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2 showing the state of the ultrasonic transmitter before operation, and FIG. Similar cross section,
FIG. 5 is a sectional view similar to FIG. 3 showing the state of the ultrasonic transmitter during operation. 1. Horizontal hole, 2. Ultrasonic transmitter, 2a. First main body portion, 2b. Second main body portion, 3. Water pressure pump, 5.
・Water pressure hose, 6.・Transmitter, 7゜10.・Jacket (
Dismantled parts), 30.31... Combined parts.

Claims (1)

[Claims] a first main body part, a second main body part that is configured separately from the first main body part and is combined with the first main body part, and a transmitter attached to either of the two main body parts. , a dismantling member loaded between the first body part and the second body part to separate the two body parts from each other; and a dismantling member interposed between the first body part and the second body part, It consists of a joining member that acts in the direction of joining both main body parts, and is installed in a hole for inspection,
An ultrasonic transmitting device characterized in that a main body portion to which a transmitter is attached is separated from the other main body portion by the operation of a disassembly member, and the transmitter is operated with the transmitter in pressure contact with the inner wall of the hole.