JPH11107663A - Excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by excavating a ground by the high-pressure water of a high-pressure water supply flow path while pushing up excavated earth and sand upward by the compressed air in a compressed-air supply flow path. SOLUTION: The excavator A is composed of an excavating section 1, in which a high-pressure water feed pipe 27 and a compressed-air feed pipe 28 are juxtaposed, a hanging section 2, a high-pressure water supply section 3 and a compressed-air supply section 4. When soil and sand in a steel-pipe sheet pile connector, etc., are excavated, high-pressure water W is ejected from the high-pressure water injection nozzle 29 of the pipe 27, and compressed air (a) is ejected from the lower-end opening section 30 of the pipe 28. Vibrations are applied by a vibration-connecting body 5 and the excavating section 1 is lowered, soil and sand in an excavating space are excavated by high-pressure water W, and excavated materials are pushed up by compressed air (a). A compressed-air feed hose 12 is replaced with a mortar injection hose, and the inside of the excavating space is filled with mortar from the pipe 28. The excavating section 1 may also be formed in double pipes, in which the pipe 28 is disposed onto the outer circumference of the pipe 27. Accordingly, the efficiency of excavation and mortar injection works can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a drilling rig.

[0002]

2. Description of the Related Art Conventionally, for example, when a foundation is constructed, a number of steel pipe sheet piles are built adjacent to the ground to form a wall body in the ground, as shown in FIG. To
Each steel pipe sheet pile K is provided with a connecting body J which is substantially C-shaped in plan view and extends vertically along the steel pipe sheet pile K, and is connected to adjacent steel pipe sheet piles K, K, respectively. Body J, J
They are connected by engaging each other.

Then, the inside of the steel pipe sheet pile K and the inside of the connection body J are excavated by a boring machine, and thereafter, mortar is injected into the steel pipe sheet pile K and the inside of the connection body J, respectively.

[0004] At this time, the vertically long space in the connecting body J is divided into two vertically, because the adjacent connecting bodies J and J are engaged with each other. Since the excavation cross-sectional area is small, it is necessary to excavate with a boring rod. When a required excavation depth cannot be obtained, excavation is performed while adding a boring rod appropriately.

[0005]

However, in the above case, after the excavation work with the boring rod is completed,
The mortar pouring operation is started, but at this time, the extended boring rod cannot be pulled up at once, and it is pulled up to the extended portion to remove the upper boring rod. There is the complexity that it is necessary to repeat the work of removing the upper boring rod by pulling up to the extension part, and after completely pulling up the boring rod, inserting the mortar injection hose into the excavated vertical space, and then In addition, it was necessary to inject mortar through the mortar injection hose.

Also, the boring rod has a disadvantage in that the excavation speed is low and the excavation work efficiency is low.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a high-pressure water supply channel forming body for excavating underground by ejecting high-pressure water from a lower end opening of a high-pressure water supply channel, and a compressed air supply channel. And a compressed air supply flow path forming body that pushes up the excavated soil and the like by ejecting compressed air from a lower end opening of the excavating apparatus.

The present invention also has the following configuration.

[0009] The high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed in the shape of a pipe extending in the up-down direction and arranged side by side.

The high-pressure water supply channel forming member and the compressed air supply channel forming member are each formed in a pipe shape extending in the vertical direction, and the compressed air supply channel forming member is formed on the outer periphery of the high-pressure water supply channel forming member. To form an inner / outer double pipe structure in which a compressed air supply passage is formed between the inner peripheral surface of the compressed air supply passage forming member and the outer peripheral surface of the high pressure water supply passage forming member. thing.

The high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed of a nozzle forming part forming a tip part and a flexible hose-shaped supply part connected to the nozzle forming part. thing.

[0012] The nozzle forming portion of the high-pressure water supply flow path forming body has an excavation direction ejection hole for ejecting high-pressure water in the excavation direction,
A high-pressure water supply flow path is formed with a high-pressure water supply flow path, the high-pressure water supply flow path being configured to discharge high-pressure water in a radiation direction centered on the high-pressure water flow in the same direction as the high-pressure water supply.

[0013] In the nozzle forming portion of the compressed air supply flow path forming body, a radiation direction ejection hole for ejecting compressed air in a radial direction from the compressed air supply flow path is formed.

[0014] Either high-pressure water or compressed air is selectively supplied into a supply channel forming body having a nozzle forming portion formed at a tip end thereof, and can be ejected from a nozzle forming portion. In the radiation direction centering on the excavation direction, the drilling direction orifice with a constant depression angle, and in the radiation direction centering on the excavation direction and the excavation reverse orifice with a constant elevation angle Formed.

[0015] One of the high-pressure water, the compressed air, and the solidifying material is selectively supplied into the supply channel forming body, and can be ejected from the nozzle forming portion.

[0016] In the nozzle forming portion, a peripheral ejection hole is formed in a radiation direction centering on the excavation direction and substantially perpendicular to the excavation direction.

[0017]

Embodiments of the present invention will be described below.

That is, the excavator according to the present invention comprises a high-pressure water supply channel forming body for excavating underground by ejecting high-pressure water from a lower end opening of the high-pressure water supply channel, and a lower end of the compressed air supply channel. And a compressed air supply flow path forming body for ejecting compressed air from the opening to push up excavated earth and sand.

As described above, the excavation work can be efficiently performed by cooperating the high-pressure water and the compressed air, and the excavation work efficiency can be improved.

Moreover, after the excavation work is completed, the mortar is injected through the compressed air supply flow path and the high-pressure water supply flow path formation body and the compressed air supply flow path formation body are pulled up to thereby perform the mortar injection work. Can be performed, and the efficiency of the mortar injection operation can be improved.

Therefore, the excavating operation and the mortar pouring operation can be performed continuously and smoothly, so that the overall operation efficiency can be improved and the operation cost can be reduced.

The high-pressure water supply flow path forming body and the compressed air supply flow path forming body are formed side by side in the form of pipes extending vertically.

In this way, the excavating operation and the mortar pouring operation can be performed efficiently and continuously as described above even in a place where the cross-sectional area of the excavated portion is small.

Each of the high-pressure water supply channel forming member and the compressed air supply channel forming member is formed into a pipe extending in the vertical direction, and the compressed air supply channel forming member is formed on the outer periphery of the high-pressure water supply channel forming member. By piping the formed body, an inner and outer double pipe structure in which a compressed air supply flow path is formed between the inner peripheral surface of the compressed air supply flow path formed body and the outer peripheral surface of the high pressure water supply flow path formed body You can also.

Thus, in addition to the above effects, the excavated muddy soil and the like are efficiently transported upward by compressed air along the outer peripheral surface of the compressed air supply flow path forming body (air lift). The excavation work efficiency can be further improved.

The high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed of a nozzle forming section forming a front end, and a flexible hose-shaped supplying section connected to the nozzle forming section. It can also be formed.

In this way, even when the excavation depth is deep (for example, 20 m or more), the excavating operation and the mortar pouring operation can be continuously performed without extending the supply portion by forming the supply portion to be long. Can be performed, and the excavation work efficiency can be further improved.

At this time, since the supply section is formed in a flexible hose shape, the supply section may be wound up and stored compactly on a reel, for example, or may be sequentially pulled out from the reel to efficiently perform excavation work and mortar. An injection operation can be performed.

Further, in this case, there is no need for a large-sized working machine for raising the high-pressure water supply flow path forming body and the compressed air supply flow path forming body to a high position. As a result, restrictions on working conditions and the like are reduced. And work costs can be reduced.

The nozzle forming portion of the high-pressure water supply flow path forming body has an excavation direction ejection hole for ejecting high pressure water in the excavation direction, and a fixed radiation direction centered on the excavation direction ejection hole. A high-pressure water supply flow passage is formed with a high-pressure water supply flow path and a high-pressure water supply flow path that discharges high-pressure water in the high-pressure water flow in the high-water direction.

In this manner, the propulsion force in the excavation direction is obtained by the high-pressure water jetted from the excavation reverse jet hole,
From this point as well, the excavation work capability can be improved.

Further, there is no need for a separate working machine for raising the high-pressure water / compressed air supply flow path forming body to a high position or a working machine for pressing in the direction of excavation. Restrictions can be reduced, and work costs can be reduced.

In the nozzle forming portion of the compressed air supply flow path forming body, a radiation direction ejection hole for ejecting compressed air in the radiation direction from the compressed air supply flow path is formed.

In this way, the transfer effect (air lift effect) of the excavated muddy soil and the like by the compressed air can be enhanced, and the excavation work efficiency can be improved from this point as well.

Further, the excavator according to the present invention selectively supplies one of high-pressure water and compressed air to a supply channel forming body having a nozzle forming portion formed at a tip end thereof. In addition to being able to eject more, the nozzle forming portion has a radiation direction centered on the excavation direction, and an excavation direction ejection hole forming a constant elevation angle, and a radiation direction centered on the excavation direction, and a constant It forms an excavation reverse direction orifice that forms an elevation angle.

In this manner, high-pressure water is supplied into the supply channel forming body, and high-pressure water is jetted from the jetting hole in the excavation direction of the nozzle forming portion, so that excavation work can be performed.

At this time, high-pressure water is also ejected from the ejection holes in the direction opposite to the excavation direction of the nozzle forming section, so that the nozzle forming section can be propelled in the excavation direction, and the excavation work efficiency can be improved.

After the excavation of a predetermined depth is completed, compressed air is supplied into the supply flow path forming body, and compressed air is ejected from the excavation direction ejection hole and the excavation reverse direction ejection hole of the nozzle forming portion. Accordingly, the excavated muddy soil and the like can be transferred upward (air lift) and discharged.

Here, since the high-pressure water and the compressed air are selectively supplied to one supply passage forming body, the supply passage forming body can be inserted into a narrow space. Thus, the range of application in excavation work can be expanded.

Further, any one of high-pressure water, compressed air, and solidified material is selectively supplied into the supply channel forming body,
It can also be possible to eject from the nozzle forming part.

In this way, after the excavated soil and the like are transferred and discharged by the compressed air, the solidified material is supplied into the supply channel forming body, and the excavation direction ejection hole and the excavation reverse direction ejection hole of the nozzle forming portion are supplied. The solidified material is ejected to fill and solidify the solidified material in the excavation hole, so that the water stopping effect can be secured.

Accordingly, the above-described excavation work → transfer work of excavated earth and sand → filling and solidification work of the solidified material can be continuously and efficiently performed.

Further, the nozzle forming portion may be formed with a peripheral ejection hole in a radiation direction centering on the excavation direction and substantially perpendicular to the excavation direction.

In this manner, high-pressure water, compressed air, and solidified material can be ejected from the peripheral ejection holes, and the above-described excavation work → transfer work of excavated earth and sand → filling / solidifying work of the solidified material can be further performed. It can be performed more efficiently.

[0045]

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

A shown in FIG. 1 is an excavating apparatus according to the present invention. The excavating apparatus A includes an excavating section 1, a suspending section 2 for suspending the excavating section 1, and a suspending section 2 for suspending the excavating section 1. A high-pressure water supply unit 3 for supplying high-pressure water to the inserted excavation unit 1;
And a compressed air supply unit 4 for supplying compressed air to the excavation unit 1 in parallel.

The suspension unit 2 is connected to the upper end of the excavation unit 1 to apply vibration to the excavation unit 1, and a control unit 6 for controlling the vibration / connection unit 5. When,
And a generator 7 for supplying electricity to the vibration / connection body 5.

The high-pressure water supply unit 3 has a submersible pump 8
, A water tank 9 and a pressure pump 10, and the excavation unit 1 is connected to the pressure pump 10 via a high-pressure water supply hose 11.

The compressed air supply section 4 has a built-in compressor (not shown), and the excavating section 1 is connected to the compressor via a compressed air supply hose 12.

The excavating section 1 includes a connecting plate 20 detachably connected to the vibration / connecting body 5, a high-pressure water supply pipe 27 as a high-pressure water supply flow path forming body extending in the vertical direction, and a vertical extending The upper ends of the compressed air supply pipes 28 as the compressed air supply flow path forming bodies to be fixed are fixed, and the hose connectors 23 and 24 are provided at the upper ends of the pipes 27 and 28, respectively.
The high pressure water supply hose 11 and the compressed air supply hose
12 is detachably connected.

A high-pressure water jet nozzle 29 is attached to the lowermost end of the high-pressure water supply pipe 27.

The high-pressure water supply pipe 27 and the compressed air supply pipe 28 are juxtaposed, and the high-pressure water ejection pipe attached to the lower end of the high-pressure water supply pipe 27 is located at the lower end opening 30 of the compressed air supply pipe 28. The nozzle 29 is located below.

Thus, the submersible pump 8 → water tank 9 →
Pressure pump 10 → High pressure water supply hose 11 → High pressure water supply pipe
27 → High-pressure water w can be jetted from the high-pressure water jet nozzle 29.

Also, a compressor → compressed air supply hose
12 → Connected pipe 22 for compressed air → Compressed air supply pipe 28 →
The compressed air “a” can be ejected from the lower end opening 30.

In this embodiment, the excavator A configured as described above excavates earth and sand in the joint J of the steel pipe sheet piles K shown in FIGS. 1 and 2 and places mortar in the joint J. It can be filled.

That is, as shown in FIG. 2, the first joints J, J buried underground in a mutually connected state have the first
-The second and third vertical spaces S1, S2, S3 are formed, and each vertical space S1, S2, S3 is filled with earth and sand. First, the soil and the like in the first vertical space S1 are removed. When excavating, the excavation unit 1 is suspended above the first vertically long space S1, and the high-pressure water jet nozzle 29 attached to the lowermost end of the high-pressure water supply pipe 27 of the excavation unit 1
Injects more high-pressure water w and compressed air supply pipe
While the compressed air “a” is blown out from the lower end opening 30 of the pipe 28, the pipes 27 and 28 are lowered while applying vibration to the pipes 27 and 28 by the vibration / connecting body 5.

In this way, the high-pressure water w jetted from the high-pressure water jet nozzle 29 excavates the soil and the like in the first vertically long space S1, and the excavated muddy soil and the like are moved upward by the compressed air a. It can be pushed up and excavated efficiently.

At this time, all the soil and the like in the first vertically long space S1 are pushed upward along the peripheral surface of the connecting body J by the compressed air a and are discharged to the outside. The inside of the space S1 is excavated over the entire cross section.

A mortar injection hose (not shown) is connected to the compressed air supply pipe 28 instead of the compressed air supply hose 12.
And while the mortar is being injected from the same mortar injection hose into the compressed air supply pipe 28 → the lower end opening 30 → the first vertical space S1, the excavation portion 1 is gradually pulled up, and the mortar is drawn into the first vertical space S1. Fill mortar.

Subsequently, the second vertically long space S2 and the third vertically long space S3
Excavation work and mortar pouring work are similarly performed.

The digging operation and the mortar pouring operation can be performed by increasing the number of the excavating parts 1 so that the first and second digging operations are performed.
-The third vertically long spaces S1, S2, and S3 can be simultaneously performed in parallel.

The length of the high-pressure water supply pipe 27 and the length of the compressed air supply pipe 28 can be appropriately set according to the depth of each of the vertically long spaces S1, S2, S3, and the pipes 27, 28 can be added. By doing so, the excavation work and the mortar injection work can be performed efficiently to a desired depth.

The outer diameters of the high-pressure water supply pipe 27 and the compressed air supply pipe 28 are the first, second, and third vertically long spaces S1, S2, S3.
Can be set as appropriate in accordance with the cross-sectional area and the excavation efficiency.

FIGS. 3 and 4 show a digging section 1 as a second embodiment.
An inner and outer double pipe in which a compressed air supply pipe 28 is provided on the outer periphery of the inner pipe and an air supply passage 31 is formed between the inner peripheral face of the compressed air supply pipe 28 and the outer peripheral face of the high-pressure water supply pipe 27 It has a structure. 32 is a high-pressure water supply channel, 33 is a spacer, 34,3
5 is a pipe connection bracket, and 36 is a suspension wire.

As described above, high-pressure water is jetted from the high-pressure water jet nozzle 29 attached to the lower end of the high-pressure water supply pipe 27 to excavate earth and sand, and compressed air is supplied from the lower end opening 30 of the compressed air supply pipe 28. , And the excavated muddy soil and the like are smoothly pushed upward along the outer peripheral surface of the compressed air supply pipe 28 and the peripheral surface of the connecting body J, so that the excavation work can be performed efficiently. Like that.

FIG. 5 shows a digging section 1 and a hanging section 2 as a second embodiment.

First, the hanging section 2 will be described. The hanging section 2 is provided with a high-pressure water supply hose reel 42 and a handrail body 43 on a lower frame 41 of a base 40, and directly above the reel 42. Arrange the upper frame 44 at the position via the post 45,
A compressed air supply hose reel 46 and a winch 47 are mounted on the upper frame 44, and the reel
A control panel 48 for controlling the driving of the winches 47 is provided.

At the lower frame 41 located immediately below the high-pressure water supply hose reel 42, a positioning body 49 for fitting and positioning in the steel pipe sheet pile K is vertically provided.

The excavating part 1 is, as shown in FIGS. 5 and 6,
A high-pressure water supply channel forming member 50, a compressed air supply channel forming member 51, and a pulling wire 52 are provided.

As shown in FIGS. 6 to 9, both forming bodies 50 and 51 are formed with tubular nozzle forming parts 53 and 5 forming the front end.
4 and flexible hoses 55 and 56 as supply units connected to the respective nozzle forming units 53 and 54, and nozzles for supplying compressed air to the outer periphery of the nozzle forming unit 53 for supplying high-pressure water. The forming section 54 is provided with an inner / outer double pipe structure in which a compressed air supply flow path 57 between the peripheral surfaces of the nozzle forming sections 53 and 54 is formed. 58 is a high-pressure water supply channel.

The nozzle forming section 53 of the high-pressure water supply channel forming body 50
A nozzle portion 59 is attached to the lower end of the nozzle portion.
In the excavation direction, high pressure water is ejected in the direction of excavation.
And, in the radiation direction centered on the excavation direction orifice 60, and four excavation reverse direction orifices 61, 61, 61, 61 for ejecting high-pressure water in the excavation direction forming a constant elevation angle θ, It is formed so as to communicate with the high-pressure water supply channel 58. Reference numeral 63 denotes a wire connection bracket, to which the tip of the pulling wire 52 is connected.

The nozzle forming portion 54 of the compressed air supply channel forming member 51 has four radial ejection holes 6 for ejecting compressed air from the lower part of the compressed air supply channel 57 in the radiation direction.
2, 62, 62, 62 are formed.

The high-pressure water supply hose 55 has a base end wound around the high-pressure water supply hose reel 42, a base end connected to the high-pressure water supply hose 11, and a compressed air supply hose.
56, the base end side is wound around the compressed air supply hose reel 46, and the base end is connected to the compressed air supply hose 12,
The pulling wire 52 is wound around the winch 47 on the base end side.

Reference numeral 64 denotes a lower hose guide roller which is mounted on the lower frame 41 so that the slide position can be adjusted in the front-rear direction.
Is an upper hose guide roller attached to the upper frame 44.

In this way, the nozzle forming sections 53 and 54 are
For example, by arranging in the first vertically long space S1 and ejecting high-pressure water from the ejection holes 60 and 61 of the nozzle portion 59 and ejecting compressed air from the radiation direction ejection holes 62, the excavation direction ejection holes 60 The extruded high-pressure water excavates earth and sand, and the nozzle forming sections 53 and 54 receive propulsion in the excavation direction by propulsion in the excavation direction by propulsion in the excavation direction by high-pressure water jetted from the excavation reverse jet holes 61 Moreover, the excavated earth and sand becomes muddy and is pushed upward by the compressed air ejected from the radial ejection holes 62, so that the entire first longitudinal space S1 is smoothly and reliably excavated. Is done.

At this time, the drive of the reels 42 and 46 and the winch 47 is synchronized by the control panel 48 so that each hose
55, 56 and the pulling wire 52 are sequentially fed out, and each hose 5
From 5,56, high pressure water and compressed air can be continuously supplied.

Therefore, when the excavation depth is deep, for example, 20
Even in excavation of m or more, if the length of each of the hoses 55 and 56 is sufficiently ensured, excavation work can be performed continuously without additional work.

After completion of the excavation, the mortar is injected into the compressed air supply channel 57 through the hose 56, and the mortar is ejected from the radial ejection holes 62.
By unwinding 55, 56 and the pulling wire 52, the first
The vertical space S1 can be filled with mortar.

Further, when changing the vertical space to be excavated, as shown in FIG. 5, by adjusting the slide position of the lower hose guide roller 64, the excavation work can be performed without changing the posture of the hanging portion 2. Can be started.

Also, as shown by the chain line in FIG. 5, the vertical space to be excavated can be changed by turning the hanging portion 2 180 degrees around the positioning body 49 fitted to the steel pipe sheet pile K. You.

As described above, in the present embodiment, the excavation work of a plurality of vertical holes can be sequentially performed only by installing the hanging portion 2 once, so that the installation work time of the hanging portion 2 is reduced. This also improves the overall work efficiency.

Also, a plurality of excavating parts 1 can be provided in the hanging part 2 to simultaneously perform excavating work in a plurality of vertically long spaces.

FIG. 10 shows a digging section 1 and a hanging section 2 as a third embodiment.

First, the hanging section 2 will be described. The hanging section 2 is provided with a supply hose reel 70 and a handrail body 43 on a lower frame 41 of a base 40, and is provided at a position immediately above the reel 70. An upper frame 44 is arranged via a support 45, a winch 47 is placed on the upper frame 44, and a handrail 43
Has a control panel that controls the drive of the reel 70 and winch 47
48 are provided.

A positioning body 49 for fitting and positioning the steel pipe sheet pile K in the lower frame 41 located immediately below the supply hose reel 70 is provided vertically.

As shown in FIGS. 10 and 11, the excavating section 1 includes a supply flow path forming body 71 and a pulling wire 52.

As shown in FIGS. 11 to 14, the supply flow path forming body 71 includes a tubular nozzle forming section 72 forming a front end, and a flexible nozzle serving as a supply section connected to the nozzle forming section 72. Sex hose 73. 74 is a supply channel.

At the lower end of the nozzle forming section 72 of the supply flow path forming body 71, a nozzle section 75 is attached.
In the radiation direction centered on the excavation direction, and four excavation direction ejection holes 76, 76, 76, 76 forming a certain depression angle θ1, and in the radiation direction centered on the same excavation direction and a certain elevation angle θ
2) Four excavation reverse vents 77, 77, 77, 77 and four surrounding vents 78, 78, 78, 78 in the radiation direction centered on the excavation direction and orthogonal to the excavation direction Are formed to communicate with the supply flow path 74.

As shown in FIG. 10, the hose 73 is wound around a supply hose reel 70 at the base end, connected to a supply hose 79 at the base end, and connected to the supply hose 79 by the pressure pump 10 and the compressor 80. A solidified material pumping section 81 for pumping a solidified material such as mortar is connected in parallel via connecting hoses 82, 83, 84, respectively, and each connecting hose 82, 83, 84 has an on-off valve 85, 8 respectively.
6, 87, and selectively open one of the on-off valves 85, 86, 87 to supply one of high-pressure water, compressed air, and solidified material to the supply hose 79. It can be supplied. In addition, the pulling wire 52 has a winch 47 at the base end.
It is wound around.

Next, the excavation work procedure will be specifically described.

The nozzle forming section 74 is disposed, for example, in the first vertically long space S 1, and high-pressure water is jetted from each of the jet holes 76, 77, 78 of the nozzle section 75, so that the excavation direction jet hole 76 and the surrounding jet are formed. The high-pressure water spouted from the hole 78 excavates earth and sand below and around, and the high-pressure water spouted from the excavation reverse direction ejection hole 77 causes the nozzle forming unit 72 to receive a propulsive force in the excavation direction and propelled. The first vertical space S1 is smoothly and reliably excavated over the entire surface.

At this time, the supply hose reel 70 and the winch 47
Is synchronized by the control panel 48, so that the hose 73 and the pulling wire 52 are sequentially fed out, so that the high-pressure water can be continuously supplied from the hose 73.

Therefore, when the excavation depth is deep, for example, 20
Even in excavation of m or more, if the length of the hose 73 is sufficiently ensured, excavation work can be performed continuously without additional work.

[0094] Compressed air is supplied into the supply flow path 74 through the hose 73, and compressed air is ejected from the ejection holes 76, 77, 78, thereby pushing up muddy excavated soil and the like. From the first vertically long space S1.

The vertical space to be excavated is changed by moving the nozzle forming section 72 onto the third vertically long space S3.

In this case, as shown in FIG. 10, by adjusting the slide position of the lower hose guide roller 64,
The nozzle forming section 72 can be moved without changing the posture of the hanging section 2.

Regarding the third vertically long space S3,
Work.

At this time, when the compressed air is supplied into the third vertically long space S3, not only the excavated soil and the like in the third vertically long space S3 but also the excavated sand and the like in the first and second vertically long spaces S1 and S2. It is pushed up and discharged.

[0099] By injecting a solidifying material such as mortar into the supply flow path 74 through the hose 73, and by ejecting the solidifying material from the ejection holes 76, 77, 78, the hose 73 is pulled up, so that the first vertically elongated shape is obtained. The space S1 is filled with the solidified material. At this time, the second
The solidified material also flows into the vertically long space S2.

The injection of the mortar is stopped, the hose 73 is inserted into the third vertically long space S3, and the hose 73 is pulled up while the solidified material is ejected from the lowermost position. The solidified material is filled in the vertical space S2.

In this way, in the first, second, and third vertically long spaces S1, S2, and S3, excavation work → transfer work of excavated earth and sand → filling and solidification of solidified material is continuously and efficiently performed. Can be.

[0102]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, a high-pressure water supply channel forming body for excavating underground by ejecting high-pressure water from a lower end opening of a high-pressure water supply channel, and a lower end opening of a compressed air supply channel Compressed air supply flow path forming body that pushes up the excavated earth and sand etc. by ejecting compressed air from the part and pushing it up, so that high-pressure water and compressed air cooperate to efficiently excavate And the efficiency of excavation work can be improved.

Further, after the excavation work is completed, the mortar injection work is performed by pulling up the high pressure water supply flow path forming body and the compressed air supply flow path forming body while pouring the mortar through the compressed air supply flow path. Can be performed, and the efficiency of the mortar injection operation can be improved.

Therefore, the excavating operation and the mortar pouring operation can be performed continuously and smoothly, so that the overall operation efficiency can be improved and the operation cost can be reduced.

According to the second aspect of the present invention, since the high-pressure water supply flow path forming body and the compressed air supply flow path forming body are formed side by side in the form of pipes extending in the vertical direction, respectively, The excavation work and the mortar pouring work can be performed continuously and smoothly efficiently even in a place where the cross-sectional area of the portion is small.

According to the third aspect of the present invention, the high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed in a pipe shape extending in the up-down direction, and the high-pressure water supply flow path forming body is formed. A compressed air supply flow path forming body is piped around the outer periphery, and a compressed air supply flow path is formed between the inner peripheral surface of the compressed air supply flow path forming body and the outer peripheral surface of the high-pressure water supply flow path forming body. Due to the inner / outer double pipe structure, in addition to the above effects, excavated muddy water and other soil can be moved upward by compressed air along the outer peripheral surface of the compressed air supply channel forming body. Transfer (air lift) can be performed well, and the excavation work efficiency can be further improved.

According to the fourth aspect of the present invention, the high-pressure water supply flow path forming body and the compressed air supply flow path forming body each have a nozzle forming part forming a tip end, and a flexible member connected to the nozzle forming part. Because it is formed from a hose-shaped supply part, even when the excavation depth is deep (for example, 20 m or more),
By forming the supply portion to be long, the excavation operation and the mortar injection operation can be continuously performed without adding, and the excavation operation efficiency can be further improved.

At this time, since the supply portion is formed in a flexible hose shape, it can be wound up and stored compactly on a reel, for example, and can be pulled out from the reel sequentially to efficiently perform excavation work and mortar. An injection operation can be performed.

Further, in this case, there is no need for a large-sized working machine for pulling up the high-pressure water supply flow path forming body and the compressed air supply flow path forming body to a high position. And work costs can be reduced.

[0111] According to the fifth aspect of the present invention, the nozzle forming portion of the high-pressure water supply flow path forming body has a digging direction jet hole for jetting high pressure water in the digging direction, and a radiation centered on the digging direction jet hole. And the high-pressure water supply channel, which is connected to the high-pressure water supply flow path. Propelling force in the direction of excavation is obtained by the high-pressure water thus produced, and the excavation work capability can be improved from this point as well.

Further, there is no need for a separate working machine for raising the high pressure water / compressed air supply flow path forming body to a high position or a working machine for pressing in the direction of excavation. Restrictions can be reduced, and work costs can be reduced.

According to the sixth aspect of the present invention, since the radial direction ejection hole for ejecting the compressed air in the radial direction from the compressed air supply passage is formed in the nozzle forming portion of the compressed air supply passage forming body. In addition, the transfer effect (air lift effect) of the excavated muddy soil and the like by the compressed air can be enhanced, and the excavation work efficiency can be improved from this point as well.

According to the seventh aspect of the present invention, one of high-pressure water and compressed air is selectively supplied to the supply channel forming body having the nozzle forming portion formed at the tip portion, and the nozzle forming portion supplies the high-pressure water or the compressed air selectively. In addition to being capable of jetting, the nozzle forming part has a drilling direction orifice with a constant depression angle in the radiation direction centering on the drilling direction, and a constant elevation angle in the radiation direction centering on the drilling direction. The excavation work is performed by supplying high-pressure water into the supply flow path forming body and ejecting high-pressure water from the excavation direction ejection hole of the nozzle forming portion because the excavation reverse direction ejection hole that forms be able to.

At this time, high-pressure water is also ejected from the expulsion hole in the nozzle forming section in the direction opposite to the excavation, so that the nozzle forming section can be propelled in the excavating direction, and the excavating work efficiency can be improved.

After excavation of a predetermined depth is completed, compressed air is supplied into the supply flow path forming body, and compressed air is ejected from the excavation direction ejection hole and the excavation reverse direction ejection hole of the nozzle forming portion. Accordingly, the excavated muddy soil and the like can be transferred upward (air lift) and discharged.

Here, since the high-pressure water and the compressed air are selectively supplied to one supply passage forming body, the supply passage forming body can be inserted into a narrow space. Thus, the applicable range of the excavation work can be expanded.

According to the present invention, any one of the high-pressure water, the compressed air, and the solidifying material is selectively supplied into the supply channel forming body, and can be ejected from the nozzle forming portion. Therefore, after transferring and discharging the excavated earth and sand by the compressed air, the solidified material is supplied into the supply channel forming body, and the solidified material is ejected from the excavation direction ejection hole and the excavation reverse direction ejection hole of the nozzle forming portion. As a result, the solidification material can be filled and solidified in the excavation hole to secure the water stopping effect.

Therefore, the above-mentioned excavation work → transfer work of excavated earth and sand → filling and solidification of the solidified material can be continuously and efficiently performed.

According to the ninth aspect of the present invention, the nozzle forming portion has a radiation direction centering on the excavation direction, and
Since the peripheral discharge hole is formed substantially perpendicular to the excavation direction, high-pressure water, compressed air, and solidified material can be discharged from the peripheral discharge hole, and the above-described excavation work → transfer work of excavated earth and sand, etc. → The work of filling and solidifying the solidified material can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an excavator according to the present invention.

FIG. 2 is an explanatory plan view showing an excavation work state.

FIG. 3 is an explanatory side view of a digging section as a second embodiment.

FIG. 4 is a sectional view taken along line II of FIG. 3;

FIG. 5 is an explanatory side view of a hanging section and a digging section as a second embodiment.

FIG. 6 is an explanatory cross-sectional side view of a digging section.

FIG. 7 is a sectional view taken along line II-II of FIG. 6;

FIG. 8 is a sectional view taken along the line III-III of FIG. 6;

FIG. 9 is a sectional view taken along line IV-IV of FIG. 6;

FIG. 10 is an explanatory side view of a hanging section and a digging section as a third embodiment.

FIG. 11 is an explanatory cross-sectional side view of a digging portion.

FIG. 12 is a sectional view taken along line VV of FIG. 11;

FIG. 13 is a sectional view taken along line VI-VI of FIG. 11;

FIG. 14 is a view taken in the direction of arrow VII in FIG. 11;

[Explanation of symbols]

 A Drilling equipment 1 Drilling part 2 Hanging part 3 High pressure water supply part 4 Compressed air supply part

Claims (9)

[Claims] 1. A high-pressure water supply channel forming body for digging underground by ejecting high-pressure water from a lower end opening of a high-pressure water supply channel;
An excavator comprising: a compressed air supply flow path forming body that ejects compressed air from a lower end opening of the compressed air supply flow path and pushes up excavated earth and sand. 2. The excavator according to claim 1, wherein the high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed in the shape of a pipe extending in a vertical direction, and are arranged side by side. 3. The high-pressure water supply flow path forming body and the compressed air supply flow path forming body are each formed in a pipe shape extending in the vertical direction, and the compressed air supply flow path formation is formed on the outer periphery of the high-pressure water supply flow path forming body. By piping the formed body, an inner and outer double pipe structure in which a compressed air supply flow path is formed between the inner peripheral surface of the compressed air supply flow path formed body and the outer peripheral surface of the high pressure water supply flow path formed body The excavator according to claim 1, wherein the excavator is made. 4. The high-pressure water supply flow path forming body and the compressed air supply flow path forming body each include a nozzle forming section forming a front end, and a flexible hose-shaped supply section connected to the nozzle forming section. The excavator according to claim 1, wherein the excavator is formed. 5. A nozzle forming portion of the high-pressure water supply flow path forming body, wherein a drilling direction jet hole for jetting high pressure water in a drilling direction, a radiation direction centered on the drilling direction jet hole, and a fixed direction. The excavator according to claim 4, wherein the excavation reverse-direction ejection hole for ejecting high-pressure water in the excavation reverse direction at an elevation angle is formed so as to communicate with the high-pressure water supply flow path. 6. The nozzle forming portion of the compressed air supply flow path forming body, wherein a radiation direction ejection hole for ejecting compressed air in a radiation direction from the compressed air supply flow path is formed. Drilling rig. 7. A high-pressure water or a compressed air is selectively supplied into a supply flow path forming body having a nozzle forming section formed at a front end thereof, so that it can be ejected from a nozzle forming section. In the forming part, a drilling direction vent hole with a constant depression angle in the radiation direction centering on the drilling direction, and a drilling reverse direction vent hole with a constant elevation angle in the radiation direction centering on the drilling direction A drilling rig characterized by forming: 8. The method according to claim 1, wherein any one of high-pressure water, compressed air, and solidifying material is selectively supplied into the supply channel forming body, and can be ejected from the nozzle forming portion. 7
Drilling rig as described. 9. The excavator according to claim 7, wherein the nozzle forming portion is formed with a peripheral ejection hole in a radiation direction centering on the excavation direction and substantially perpendicular to the excavation direction. .