JP2515651B2 - Method and device for exploring buried pipe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried pipe exploration method and device used for exploring the presence or absence of a buried pipe buried in soil.

[0002]

2. Description of the Related Art Prior to the construction of construction poles such as utility poles, it is necessary to investigate the presence of existing buried pipes such as gas pipes or water pipes.

Conventionally, in the exploration of the existing buried pipe, a probe rod is inserted into the soil and the presence or absence of the buried pipe is determined by the degree of resistance of the probe rod to approach.

[0004]

However, with such a probe method, it is difficult to insert deeply into the target ground, and even if the deep ground can be inserted into soft ground, the buried object There is a problem in that a lot of labor is required to confirm the above and pull out the probe rod. For this reason, it has been conventionally performed to reduce the insertion depth of the probe rod by performing a trial digging on the destination ground in advance, but this trial digging is usually performed by hand digging, which requires a great deal of labor. Not only that, but especially in case of step digging, it requires a wide area for excavation, and it is the current situation that it is impossible to carry out test digging in a narrow urban area.

The present invention has been made in view of the above circumstances, and in exploring a buried pipe for construction of a building, it does not require trial digging, the probe can be easily and quickly performed with a small amount of labor, and An object of the present invention is to provide a method and apparatus for exploring a buried pipe, which enables accurate confirmation of the buried object and facilitates this even when pulling out.

[0006]

Means for Solving the Problems In order to solve the above problems, the method for exploring a buried pipe according to the present invention is as follows.
A method is provided in which a bit is provided at the tip of the pipe, the fluid is jetted from the bit to excavate the soil, and the presence or absence of the buried pipe in the soil is investigated by the degree of penetration. It is an exploration method. 1) A work step in which compressed air is ejected from the bit 1 fixed to the tip of the inner pipe 2 inserted into the outer pipe 3 to make the soil around the bit 1 into a dust state and blow up to the ground. Here, the outer pipe 3 is
The inner circumference is round and the inner pipe 2 is inserted therethrough. The inner pipe 2 has a rectangular outer periphery, is longer than the outer pipe 3, and has a bit 1 fixed to the tip thereof. The bit 1 has an outer diameter larger than the outer diameter of the outer pipe 3, and a plurality of ejection holes 5 are formed in a diagonally upward and downward direction so that compressed air supplied from the ground through the inner pipe 2 can be supplied. It is capable of ejecting vertically and obliquely, and a screw portion 8 for inserting a small camera which is detachable from the upper end opening portion of the inner pipe 2 is provided at the tip portion thereof. 2) A work process of inserting the outer pipe 3 into the soil along with the excavation by the bit 1 in step 1. 3) Then, along with the digging by bit 1 of step 1,
Insert the inner pipe 2 inside the outer pipe 3
A work process in which it is inserted into the soil deeper than work process 1 while rotating and sliding vertically. 4) A work process in which the presence or absence of a buried pipe in the soil is searched by performing the work processes 1, 2 and 3 according to the degree of the ingress resistance of the bit 1 which is dug into the soil. 5) When a suspected buried pipe is found in the soil in work step 4, the screw part 8 is inserted with the bit 1 still inserted in the soil.
Open the inside of the inner pipe 2, insert a small camera from the upper opening of the inner pipe, and project it on the ground to check the buried object. In the buried pipe exploration device of the present invention, the inner pipe 2 longer than the outer pipe 3 is inserted into the circumference of the outer pipe 3, and the inner pipe 2 is inserted into the inner pipe 2 at the tip thereof. , A bit 1 having an outer diameter larger than the outer diameter of the outer pipe 3 is fixed, and a plurality of ejection holes 5 are bored in the bit 1 in a vertically diagonal direction,
A stopper 9 for restricting the vertical movement width of the inner pipe 2 inserted into the outer pipe 3 is attached to the inner pipe 2 above the outer pipe 3 so as to be vertically movable, and is fed into the inner pipe 2. The compressed air is ejected from the ejection holes 5 of the bit 1. In this apparatus, the outer pipe 3 has a round inner circumference and the inner pipe 2 has a round shape.
May have a rectangular outer periphery. Further, a screw portion 8 for inserting a small camera which is detachable from the upper end opening portion of the inner pipe 2 may be provided at the tip portion of the bit 1. Further, a movable handle 6 that is movable along the axial direction of the inner pipe 2 may be attached to the inner pipe 2, and a fixed handle 7 may be fixed to the upper end portion of the outer pipe 3.

[0007]

The method and apparatus for exploring the buried pipe of the present invention constructed as above will be described with reference to FIG. 1 corresponding to the embodiment.

The method for exploring the buried pipe according to the present invention is the ejection hole 5 of the bit 1 fixed to the tip of the pipe (inner pipe 2).
a to 5d (However, the ejection holes are not limited to these four)
When compressed air is ejected from the soil, the soil to which the compressed air hits attenuates the bonding force (adhesive force) between soil particles and makes the soil into a dust state. Therefore, a plurality of ejection holes for the bit 1 are provided in a vertically diagonal direction. As a result, the soil in the advancing direction of the bit 1 is made into a dust state, and the soil in the dust state is blown up while being blown to the ground.

More specifically, ejection holes 5a to 5d are provided obliquely in the vertical direction at a plurality of positions of the bit 1 fixed to the tip of an inner pipe 2 which can be inserted into the circumference of the outer pipe 3, and the ejection holes 5a to 5d are provided from the ground. Compressed air is supplied through the inner cavity 2a of the inner pipe 2, and the compressed air is ejected from the ejection holes 5a to 5d.
It is done by spraying from. The outer pipe 3 is suppressed in the soil by the lateral stress in the soil, and as a result, the entry into the soil is suppressed.
With the configuration in which the inner pipe 2 is inserted into the outer pipe 3 as described above, the inner pipe 2 is inserted into the outer pipe 3 at a deeper degree without receiving any stress from the soil. be able to.

Further, by making the outer circumference of the inner pipe 2 rectangular and the inner circumference of the outer pipe 3 round, when the inner pipe 2 is rotated and vertically slid in the outer pipe 3, The soil blown upward from the ejection holes 5a, 5b and entering the gap 3a between the inner pipe 2 and the outer pipe 3 can be scraped off by the four protrusions 2b of the inner pipe 2,
The inner pipe 2 is filled with the soil filled in the gap 3a.
Does not make it difficult to insert the outer pipe 3 because it is tightened in the outer pipe 3.

Further, since the outer diameter of the outer pipe 3 is smaller than the outer diameter of the bit 1, when the outer pipe 3 is first inserted into the soil, even if the outer pipe 3 is pushed down from above, this outer pipe 3 Since 3 hits the upper edge of the bit 1 and is prevented from entering below the upper end of the bit 1, the bit 1 serves as the head of the outer pipe 3 without hindering the action of jetting compressed air from the jet holes 5a to 5b. Can dig.
At this time, since the stopper 9 is attached to the inner pipe 2 above the outer pipe 3 so as to be movable up and down, the outer pipe 3 is restricted from rising by the stopper 9 and enters the soil as the bit 1 is dug. Further, if the mounting position of the stopper 9 is provided with a play so that the outer pipe 3 can move up and down between the bit 1 and the stopper 9 to some extent, the bit 1 can be moved when the bit 1 is dug.
The excavation work of the bit 1 can be facilitated by swinging itself in the vertical direction as well as in the left-right rotation direction.

The outer pipe 3 and the inner pipe 2 can be pushed down by the handles 6 and 7 which are fixed to each other. The outer pipe 3 is fixed to the upper end portion thereof and the inner pipe 2 is fixed thereto. Is movable along the axial direction of the inner pipe 2, and is particularly convenient for excavating the inner pipe 2 after the outer pipe 3 is inserted.

Further, by providing the screw portion 8 for inserting and removing a small camera from the upper end opening of the inner pipe 2 at the tip portion of the bit 1, the screw portion 8 can be inserted with the bit 1 still inserted in the soil. Is opened, and a small camera, for example, a small fiber cable camera 33 connected to a Faber cable is inserted from the upper end opening of the inner pipe 2, and the outside condition of the tip of the bit 1 is displayed on the CRT 34 on the ground. As a result, it is possible to accurately confirm the buried object that prevents the bit 1 from entering.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a partially cutaway front view of a buried pipe exploration apparatus according to the present invention, and FIG. 1 (b) is a sectional view taken along the line A--A in FIG. 1 (a).
FIG. 1C is a sectional view taken along the line, and FIG. 1C is a plan view of the handle for the inner pipe of the apparatus shown in FIG. Figure 2 (a) is Figure 1
2 is an enlarged front view of the bit shown in (a), and FIG. 2 (b) is shown in FIG.
FIG. 2A is an enlarged side view seen from the right direction orthogonal to FIG. 2A, and FIG. 2C is a sectional view taken along line BB of FIG. 2A. FIG.
(a)-(f) is a figure which shows the buried pipe exploration method using the apparatus shown in FIG.1 (a).

As shown in FIG. 1 (b), an inner pipe 2 having a rectangular cross section, which is formed to be longer than the outer pipe 3, is moved vertically and horizontally in the circumference of the outer pipe 3 having a round cross section. The ridgelines of the four protruding portions 2b of the inner pipe 2 which are inserted as much as possible are in sliding contact with the inner peripheral surface of the outer pipe 3 as shown in FIG. 1 (b). However, the stopper 9 is detachably attached to the inner pipe 2 at a position above the outer pipe 3,
The upward movement of the inner pipe 2 inserted therein is restricted.

This stopper 9 is a stopper body 9a.
Insert the inner pipe 2 into the inner cavity of the stopper body 9
The screw 9b is screwed from the outside of the a, and the screw 9a is screwed and detached, so that the screw is attached to the inner pipe 2,
The inner pipe 2 can be fixed and moved in the vertical direction, and the vertical movement width of the inner pipe 2 can be adjusted depending on the mounting position on the inner pipe 2.

A bit 1 is fixed to the tip of the inner pipe 2. Bit 1 is the inner lumen 2 of the inner pipe 2.
It has a through hole 1a communicating with a and has a round cross section with an outer diameter larger than the outer diameter of the outer pipe 3 and a tip portion formed in a curved shape. Therefore, as a result of the lower end of the outer pipe 3 hitting the upper edge of the bit 1 and being restricted from descending,
The vertical movement width of the outer pipe 3 is restricted by the bit 1 on the lower side and by the stopper 9 on the upper side.

Within bit 1, as shown in FIG. 2 (a),
A screw portion 8 for inserting a small camera having a screw groove 8b provided on the inner periphery of the through hole 1a is formed, and the screw portion 8 has a screw 8
a is removably screwed, whereby the tip of the through hole 1a of the bit 1 is closed. Further, two ejection holes 5 are provided from the lower part of the through hole 1a to the left and right obliquely upward.
a and 5b are penetrated, and two ejection holes 5c and 5d are penetrated from the upper part of the through hole 1a to the left and right diagonally orthogonal to the position where the ejection holes 5a and 5b are formed. The through hole 1a is in a ventilation state with the outside through the ejection holes 5a to 5d. However, the position and number of the ejection holes to be formed are not limited to this, and can be appropriately determined.

As shown in FIG. 1 (a), since the cap 11 is screwed onto the upper end of the inner pipe 2, if the cap 11 is removed, the screw of the bit 1 is screwed from the upper end opening of the inner pipe 2. The part 8 is penetrated.

Further, a T-shaped tube 12 having a hose attaching / detaching portion 12a for feeding compressed air on the side is connected to the upper end of the inner pipe 2, and a hose attaching / detaching portion 12a is interposed by a compressor provided outside. The compressed air is sent to the inner cavity of the inner pipe 2 and ejected from the ejection holes 5a to 5d of the bit 1.

The inner pipe 2 has the inner pipe 2
A movable handle 6 that is movable along the axial direction is attached. As shown in FIG. 1 (c), the holding portion 6a of the movable handle 6 of the inner pipe 2 is fitted with the inner pipe 2 at the center of the fitting portion 66 formed by facing the half-divided urethane rubber, and the handle 6 A wire 65 is connected to a hooking portion 64 and a hooking portion 67 of the handle 6 on the opposite side in the vicinity of a base end portion of a buckle 61 that is rotatably supported by a supporting shaft 62 on a connecting rod 63 of the steering wheel 6. When the buckle 61 is tilted toward the handle 6 side with the support shaft 62 as the center, the wire 65 can tighten the inner pipe 2 through the fitting portion 66 to fix the inner pipe 2. It can be moved to the upper and lower positions of the inner pipe 2. A fixed handle 7 is fixed to the upper end of the outer pipe 3 by welding or the like via a holding portion 7a. next,
A method of exploring a buried pipe using the above device will be described with reference to FIGS. First, connect the hose attaching / detaching portion 12a of the inner pipe 2 and the compressor 25 to the hose 2
2, the compressed air supplied from the compressor 25 is sent to the inner bore 1a of the bit 1 through the inner bore 2a of the inner pipe 2, and each ejection hole 5a having a diameter smaller than that of the inner bore 1a.
It is made to jet up and down diagonally from ~ 5d. At this time, the spray holes 5c, 5d directed obliquely downward make the soil 15b in the forward direction of the bit 1 in a dust state, and the spray holes 5a, 5b directed obliquely upward make this dust soil the excavation hole 14a. It digs in the depth direction while blowing up to the ground through a gap 15a formed between the outer pipe 3 and the outer pipe 3. At this time, the dust soil ejected upward from the ejection holes 5a, 5b enters the gap 3a between the inner pipe 2 and the outer pipe 3, but the outer circumference of the inner pipe 2 is rectangular and the inner circumference of the outer pipe 3 is When the inner pipe 2 is rotated and vertically slid inside the outer pipe 3, the soil that has entered the gap 3a is
As a result, the inner pipe 2 is tightened in the outer pipe 3 by the soil clogged in the gap 3a, which makes it difficult to insert it. Further, in the present invention, both the inner pipe 2 and the outer pipe 3 may be formed as square pipes, or the inner pipe 2 may be formed as a round pipe and the outer pipe 3 may be formed as a square pipe. By doing so, the projections on the four sides of the outer pipe 3 are formed in the excavation hole 1
It has an effect of cutting off the peripheral surface of 4a, and the efficiency of excavation work can be improved. In addition, in actual excavation,
A cap-shaped mud splash prevention tool 23 on the ground 14 at the destination
Is placed and the outer pipe 3 is inserted into the hole formed in the center of the mud splash prevention tool 23, the dust soil 15c ejected upward through the gap 15a becomes the mud splash prevention tool 23.
The excavation work can be carried out cleanly.

As shown in FIG. 3 (a), the handle 7 of the outer pipe 3 is pushed down while ejecting the compressed air from the ejection holes 5a to 5d of the bit 1, as shown in FIG. 3 (b). First, the outer pipe 3 is dug deep into the ground 14. At this time, the outer pipe 3 can be swung in the up-down direction and the left-right rotation direction within the allowable range of the play widths 50a and 50b provided above and below the outer pipe 3, and the stress from the periphery of the excavation hole 14a can be reduced. .

Next, as shown in FIG. 3 (c), when the handle 6 of the inner pipe 2 is pushed down while the outer pipe 3 is still inserted in the ground 14, the inner pipe 2 is
It is possible to dig without receiving any stress from the surrounding soil.

Here, as shown in FIG. 3 (d), when the intrusion of the bit 1 is blocked by some buried object during the excavation, the supply of the compressed air is temporarily stopped, and then the upper end portion of the inner pipe 2 is stopped. The cap 11 is removed and opened, and the screw 8a at the tip of the bit 1 is removed by a long driver 31 inserted from this opening.

Then, the small fiber cable camera 33 connected to the Faber cable 32 is inserted up to the vicinity of the buried object, and the outside condition of the tip of the bit 1 is checked by the CRT on the ground.
It is possible to accurately confirm whether or not the buried object that blocks the entry of the bit 1 is the buried pipe 30 by displaying it on 34. At this time, if compressed air is further sent while the camera 33 is inspecting, the camera 3 is opened at the opening of the screw portion 8.
This compressed air is jetted outward from the gap around the periphery of the buried object 3 to blow off the surface of the buried object. Or cap 2
By supplying fresh water from the opening 1 and flowing out from the opening of the screw portion 8, the surface of the buried object can be washed away.
If this buried object is the buried pipe 30, it is not possible to construct a building pillar, so the excavation hole 14a is backfilled and another place is searched by the same method as described above.

[0027]

As described above, according to the present invention, when exploring a buried pipe for building pillar construction, the ejection item 5a of the bit 1 provided at the tip of the pipe (inner pipe 2) is used.
Due to the action of compressed air ejected from 5d, the target soil can be easily dug. Also, since the outer diameter of the outer pipe is smaller than the outer diameter of the bit, the bit can be lowered by pushing down the outer pipe, and
The outer pipe can be inserted into the soil without disturbing the jetting action of the compressed air.

If the inner pipe 2 is inserted into the outer pipe 3 and digs forward, the inner pipe 2 is in the outer pipe 3 previously inserted into the soil and is subject to stress from the surrounding soil. Without it, so deep,
It is possible to dig quickly and easily.

In such excavation work, as long as compressed air is jetted from the bit 1, the excavation work of the outer pipe 3 is performed only by pushing down the handle 7.
Further, the excavation work of the inner pipe 2 can be performed only by pushing down the handle 6 of the inner pipe 2, so that the labor and the work personnel can be reduced.

Further, by making the outer circumference of the inner pipe 2 rectangular and the inner circumference of the outer pipe 3 round, the gap between the inner pipe 2 and the outer pipe 3 is caused by the vertical movement and rotation of the inner pipe 2. Since the dust soil that has entered the inner pipe 3a can be shaved off by the four protruding portions 2b of the inner pipe 2, the inner pipe 2 is not tightened in the outer pipe 3 and it is difficult to insert it.

Further, if the tip of the bit 1 is formed to have a curved projection, the bit 1 can be easily excavated and damage to the buried pipe 1 can be avoided. Further, by providing a screw portion 8 for inserting and removing a small camera from the upper end opening portion of the inner pipe 2 at the tip end portion of the bit 1, it is possible to accurately confirm the embedded object while the bit 1 is inserted in the soil. It can be carried out.

Therefore, the method and apparatus for exploring the buried object of the present invention do not require trial digging, can easily and quickly perform the probe with a small labor, and can accurately confirm the buried object. It can be done easily. In addition, the buried pipe exploration device of the present invention is not only used for exploring the buried pipe, but also when used for general works that require drilling holes in the soil, such as gas pipe work, water pipe work, etc. The effect of the present invention can be enjoyed as it is, and it can be used as an excellent drilling device for a drilled hole.

[Brief description of drawings]

FIG. 1 (a) is a partially cutaway front view of a buried pipe exploration apparatus according to the present invention, and FIG. 1 (b) is a sectional view taken along the line AA of FIG. 1 (a). (c) is a plan view of a handle for an inner pipe of the device shown in FIG. 1 (a).

2 (a) is an enlarged front view of the bit shown in FIG. 1 (a), and FIG. 2 (b) is an enlarged side view of FIG. 2 (a) as seen from the right direction orthogonal thereto. Yes, Fig. 2 (c) is BB of Fig. 2 (a).
It is a line sectional view.

3 (a) to 3 (f) are diagrams showing a buried pipe exploration method using the apparatus shown in FIG. 1 (a).

[Description of sign]

1 ... Bit, 2 ... Inner pipe, 2b ... Projection part, 3 ...
Outer pipe, 5a to 5d ... Jet holes, 6 ... Inner pipe handle, 7 ... Outer pipe handle, 8 ...
Screw part, 9 ... Stopper. 14 ... soil, 14a ... excavation hole.

Claims (5)

(57) [Claims] 1. A method in which a bit is provided at the tip of a pipe, a fluid is jetted from the bit to excavate the soil, and the presence or absence of a buried pipe in the soil is investigated by the degree of penetration has the following working steps: Method for exploring buried pipes. 1) A work step in which compressed air is ejected from the bit 1 fixed to the tip of the inner pipe 2 inserted into the outer pipe 3 to make the soil around the bit 1 into a dust state and blow up to the ground. Here, the outer pipe 3 has a round inner periphery, and the inner pipe 2
Is inserted. The inner pipe 2 has a rectangular outer periphery, is longer than the outer pipe 3, and has a bit 1 fixed to the tip thereof. The bit 1 has an outer diameter larger than the outer diameter of the outer pipe 3, and a plurality of ejection holes 5 are formed in a diagonally upward and downward direction so that compressed air supplied from the ground through the inner pipe 2 can be supplied. It is possible to eject in a diagonal direction up and down, and further, the inner pipe 2
A screw part 8 for inserting and removing a small camera is provided from the upper end opening of the. 2) A work process of inserting the outer pipe 3 into the soil along with the excavation by the bit 1 in step 1. 3) Then, along with the digging by bit 1 of step 1,
Insert the inner pipe 2 inside the outer pipe 3
A work process in which it is inserted into the soil deeper than work process 1 while rotating and sliding vertically. 4) A work process in which the presence or absence of a buried pipe in the soil is searched by performing the work processes 1, 2 and 3 according to the degree of the ingress resistance of the bit 1 which is dug into the soil. 5) When a suspected buried pipe is found in the soil in work step 4, the screw part 8 is inserted with the bit 1 still inserted in the soil.
Open the inside of the inner pipe 2, insert a small camera from the upper opening of the inner pipe, and project it on the ground to check the buried object. 2. An inner pipe 2 longer than the outer pipe 3 is inserted into the circumference of the outer pipe 3, and the inner pipe 2 is inserted into the tip of the inner pipe 2 so that the outer diameter is the outer pipe. A bit 1 having a diameter larger than the outer diameter of 3 is fixed, and a plurality of ejection holes 5 are formed in the bit 1 in diagonally upward and downward directions, and a vertical movement width of the inner pipe 2 inserted into the outer pipe 3. A stopper 9 for regulating the above is attached to the inner pipe 2 above the outer pipe 3 so as to be movable up and down, and the compressed air fed into the inner pipe 2 is ejected from the plurality of ejection holes 5 of the bit 1. A buried pipe exploration device characterized in that 3. The outer pipe 3 has a round inner circumference,
The buried pipe exploration device according to claim 2, wherein the inner pipe 2 has a square outer periphery. 4. The buried pipe exploration according to claim 2, wherein a screw portion 8 for inserting and removing a small camera is provided at a tip end portion of the bit 1 from an upper end opening portion of the inner pipe 2. apparatus. 5. A movable handle 6 that is movable along the axial direction of the inner pipe 2 is attached to the inner pipe 2, and a fixed handle 7 is fixed to the upper end of the outer pipe 3. The buried pipe exploration device according to claim 2.