JPH09296478A - Method and device for excavating curved ditch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce excavation resistance when a curved ditch is excavated by revolving a ditch excavation body. SOLUTION: In the excavation method, when a curved ditch is excavated by revolving a ditch excavation body 22, while it is being set in the ground, at least a part of the ground, with which a portion of the body 22 excluding excavation blades thereof makes contact, is destroyed beforehand by excavating a hole H. And in the ditch excavation device, a hole excavation means is connected to a supporting member such as a gate type frame 40 for supporting the body 22 to excavate the hole H by putting an excavation shaft 90 into the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a groove excavation body in which an endless body having an excavation blade on its surface is hung between upper and lower rotating bodies to continuously form a curved groove such as a corner groove. Method and device for excavating manually.

[0002]

2. Description of the Related Art In recent years, for the purpose of construction of water walls for land cancellation,
Development of technology for continuously excavating trenches in the ground is ongoing. An example of a conventional device for excavating such a groove will be described with reference to FIGS. 10 and 11A to 11C.

The base machine (traveling machine) 10 shown in the figure comprises a traveling body having a crawler 12 and the like, on which a revolving body 14 is mounted.
Is installed so that it can rotate. A columnar leader 16 extending vertically is supported on the revolving unit 14, and the leader 16 is supported from behind by a stay 18 extending from the revolving unit 14.

A pair of left and right rails 20 are fixed to the leader 16 along the rails 16, and a groove excavation body 22 is supported so as to be vertically movable along the rails 20. The trench excavation body 22 includes a plurality of vertically divided units 24, and the units 24 at the upper and lower ends are provided with the sprocket 2 respectively.
6, 28 are rotatably mounted, and an endless drilling chain 30 having a drilling blade 32 on its surface is hung between both sprockets 26, 28. The reader 1
An elevating drive shaft 34 that moves up and down with respect to the reader 16 is housed in the center of the rod 6, while the lower end of a rod 36 is fixed to the back of the groove excavation body 22. The upper end of the drive shaft 34 is connected via a connecting member 35, and the whole of the trench excavation body 22 is driven up and down by raising and lowering the lift drive shaft 34.

According to such a device, the trench excavation body 2 is
While the upper part of 2 is left and the other part is penetrated into the ground, the crawler 12 is driven while driving the excavation chain 30 by rotating the upper sprocket 26 by a motor (not shown).
11 to move the base machine 10 in a straight line to continuously excavate a linear groove 38 along the movement trajectory of the groove excavation body 22 associated with the traveling as shown in FIG. 11A. You can Further, when the wall 39 of the building has a corner portion as shown in FIG. 2B, as shown in FIG. 3C, the space between the crawler 12 and the wall 39 in a direction orthogonal to the traveling direction thereof is provided. If the groove excavation body 22 is rotated around the vertical axis by, for example, stopping the traveling of the base machine 10 with a margin left, and then revolving the revolving structure 14 from this state, the groove 38 having an arc-shaped corner portion is formed. It is possible to drill.

[0006]

The base machine 10 described above is to be solved.
When excavating the linear groove 38 by traveling, the portion of the groove excavation body 22 other than the excavation blade 32 is hardly pressed against the ground, but the groove excavation body 22 is swung to form the curved groove 38. When excavating a trench,
In, the portion inside the digging blade 32 is forcibly pressed against the ground. For example, when the trench excavation body 22 is driven to rotate around the point O as shown in FIG. 12, the unit 24 of the trench excavation body 22 is placed on the ground of the mesh areas A1 and A2 in FIG.
And the supporting member 21 thereof is pressed. Since these portions do not have an excavating blade, the excavation resistance increases remarkably when the portions hit the ground, and there is a possibility that the ground cannot be turned (that is, excavation impossible) when the ground is hard.

In view of such circumstances, it is an object of the present invention to provide a method and apparatus capable of satisfactorily continuously excavating a curved groove with a small excavation resistance.

[0008]

As a means for solving the above-mentioned problems, the present invention provides a trench excavation body in which an endless body having a cutting blade on its surface is hung between upper and lower rotating bodies. In the method of excavating a curved groove by turning around the vertical axis while operating this groove excavation body,
When turning the groove excavation body, at least a part of the ground directly hit by a portion other than the excavation blade in the groove excavation body is collapsed in advance, and then the groove excavation body is turned to excavate the curved groove. To do.

According to this method, the turning resistance of the trench excavation body, that is, the excavation resistance is significantly reduced by the amount of turning of the trench excavation body after the soil in a predetermined area is destroyed in advance, and when the ground is relatively hard. Also enables good excavation of curved grooves.

Here, as a means for breaking the ground, a method of digging a hole by penetrating at least a part of the ground with an excavation shaft is effective.

The present invention also provides a groove excavation body, which is formed by hanging an endless body having a cutting blade on the surface between upper and lower rotating bodies.
And a supporting member for excavating the groove excavation body so as to be rotatable about a vertical axis and capable of moving up and down, and the vertical axis while operating the groove excavation body with the groove excavation body penetrating into the ground. In a curved groove excavating device which is configured to excavate a curved groove by turning around, a hole excavating means for excavating a hole in the ground by penetration of an excavating shaft is connected to the groove excavating support member. According to this device, it is possible to perform both ground breaking work and excavation work of a curved groove in the above area with a single device.

Here, the number of the excavating shafts is not particularly limited, but if the hole excavating means simultaneously penetrates a plurality of horizontally excavating shafts, the diameter of each excavating shaft can be kept small. Therefore, it becomes possible to perform a suitable drilling corresponding to the turning trajectory of the trench excavation body.

Further, by providing a penetration means for holding the excavation shaft and penetrating it into the ground, and a rotation support means for supporting the penetration means so as to be rotatable about a vertical axis,
By appropriately rotating the penetrating means to carry out the penetrating work of the excavating shaft at a plurality of positions, it is possible to drill a wider area.

As the groove excavating support member, there are provided a swivel support member which is swivelable about the vertical axis and supported so as to be able to move up and down, and a slide support member which slidably supports the swivel support member in the horizontal direction. It is preferable that the hole excavating means is connected to the slide support member. In this device, by sliding the swivel support member and the trench excavation body, and then directly swiveling the trench excavation body,
A straight groove and a curved groove can be continuously and smoothly excavated.

In this case, the hole excavating means can penetrate the excavation shaft into at least a part of the ground on which a portion other than the excavating blade of the groove excavating body directly hits when the excavating body sliding to a predetermined position turns. If it is connected to the slide support member so as to be movable between a penetration position and a retracted position further from the groove excavation body than the penetration position,
After the excavation shaft is penetrated at the penetration position, the hole excavation means is retracted to the retracted position to avoid the interference between the hole excavation means and the groove excavation body, thereby freely expanding the excavation area by the groove excavation body. You can

The groove excavation body, the groove excavation support member, and the hole excavation means may be directly installed on the ground.
If these are mounted on a traveling body that travels on the ground, the transportation becomes easy. Further, by running the traveling body while penetrating the groove excavation body into the ground, it becomes possible to freely excavate a straight groove having a desired length.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a preferred embodiment of the present invention will be described with reference to FIGS. In these drawings, the same elements as those shown in FIGS. 10 to 12 are designated by the same reference numerals and the description thereof will be given.

1 to 3, reference numeral 10 denotes a base machine equivalent to that conventionally used for shaft excavation and the like. This base machine 10 has a traveling body 13 provided with a crawler 12 and this traveling machine. The swing body 14 is provided on the body 13 so as to be swingable. The traveling body 13 and the swing body 14 support a gate-shaped frame (slide support member) 40 in an upright state.

The gate-shaped frame 40 is formed by connecting a horizontal upper beam 41 and a lower beam 42 with a plurality of columns 43.
The lower beam 42 is connected to the traveling body 13 via a bracket 45, and the upper beam 41 is connected to the revolving structure 14 via a stay 46.
Supported by the side.

Rails 47 and 48 are fixed to the upper surface of the upper beam 41 and the lower surface of the lower beam 42 along the beams 41 and 42, and sliders 50 and 52 are slidably mounted on the rails 47 and 48, respectively. Installed. Each slider 50, 5
2, leader holding rings 58 and 56 are fixed to the leader holding rings 58 and 56, respectively, and the leader 16 is supported by the leader holding rings 58 and 56 with the cylindrical leader (turning support member) 16 penetrating the leader holding rings 58 and 56. It is held so that it can rotate and cannot move up and down. Further, on the upper beam 41, a slide cylinder 54 is fixed along the same,
The slider 55 of the slide cylinder 54 and the slider 50 are connected to each other, and the operation of the slide cylinder 54 causes the leader 16 and the upper and lower sliders 50, 52 to move.
Are designed to slide together.

As shown in FIGS. 4 and 5, on the slider 50, head-side end portions of a pair of left and right hydraulic cylinders 64 are mounted so as to be rotatable around a vertical pin 62. On the other hand, a pair of left and right brackets 66 are provided so as to project from the outer peripheral surface of the leader 16.
The ends of the rods 65 of the hydraulic cylinders 64 are connected to 6 so as to be rotatable about pins 68 in the vertical direction. Therefore, one of the hydraulic cylinders 64 extends and the other contracts, whereby the leader 16 is driven to rotate about its central axis.

A pair of left and right rails 20 are fixed to the reader 16 along the rails 20.
A groove excavation body 22 is supported so as to be slidable along (i.e., vertically movable).

More specifically, the trench excavation body 22 includes a rotary drive device 23 and a plurality of split-type units 24 shown in FIG. 11, and the rotary drive device 23 is slidable on the rail 20. The units 24 are vertically stacked and interconnected to form a frame extending in the vertical direction as a whole. The upper sprocket 26 is connected to the output shaft of the rotary drive device 23, and the lower sprocket 2 is attached to the unit 24 at the lowermost end.
8 is rotatably mounted, and both sprockets 2
An endless drilling chain 30 having a drilling blade 32 on its surface is hung between 6 and 28. Like the unit 24, the excavation chain 30 can be divided into a large number in the longitudinal direction.

A bracket 7 is provided on the top of the leader 16.
The top sheaves 72 and 74 are rotatably supported via 0, and the sheave 76 is rotatably attached to the top of the rotary drive device 23. Then, the wire pulled out from the winch 73 mounted on the revolving structure 14 is connected to the top sheave 7
It is properly wound around 2, 74, 76, and the winch 7
By the operation of 3, the whole trench excavation body 22 is vertically driven along the leader 16.

Further, a rotating frame 80 is connected to a side end portion (left end portion in FIG. 1) of the gate frame 40 via a hinge 78 so as to be rotatable about a vertical axis.
As shown in FIG. 6, a leader holding ring 82 is fixed to the turning end of the turning frame 80, and the leader 84 rotates around its own axis in a state where a cylindrical leader 84 penetrates the leader holding ring 82. It is rotatably held at.

A pair of left and right rails 86 extending vertically is fixed to the leader 84, and an excavation shaft drive device 88 is supported so as to be able to move up and down along the rails 86. This excavation shaft drive device 88 holds a plurality of (three in the illustrated example) excavation shafts 90 aligned in the horizontal direction, and has a built-in motor for simultaneously rotating and driving these excavation shafts 90. An auger head 92 is provided at the lower end of each excavation shaft 90.

A sheave 94 is provided on the top of the excavation shaft drive device 88.
However, a top sheave 96 is rotatably attached to the top of the leader 84, and a wire 98 drawn from a winch (not shown) mounted on the revolving structure 14 is attached to the sheave 9 described above.
4 and 96 are appropriately wound, and the excavation shaft drive device 88 is appropriately moved up and down with the operation of the winch. Then, while the respective excavation shafts 90 are rotationally driven by the excavation shaft drive device 88, the excavation shaft 90 and the excavation shaft drive device 88 are integrally lowered, so that the three circular holes H are partially formed in the ground. The holes are drilled in an overlapping manner.

That is, a penetrating means is constituted by the leader 84 and the excavation shaft drive device 88, and the leader 84 and the excavation shaft drive device 88 are rotatably supported by the pivot frame 80 and the leader holding ring 82. A rotation support member is configured.

The head side end of the hydraulic cylinder 100 is rotatably connected to the rotary frame 80 via a pin 101, and the rod tip of the hydraulic cylinder 100 is connected to the pin 1.
It is connected to the outer peripheral surface of the leader 84 via 02, and the leader 84, the excavation axis drive device 88, and the entire excavation axis 90 are integrally rotated by the expansion and contraction operation of the hydraulic cylinder 100. .

On the back surface of the upper beam 41 of the portal frame 40, the head side end of the hydraulic cylinder 104 is provided with the pin 10.
This hydraulic cylinder 10 is rotatably connected via
The tip of the rod 4 is rotatably connected to the rotating frame 80 via a pin 106, and the hydraulic cylinder 104
The operation of the rotating frame 80 itself causes the hinge 78 to move.
It is designed to be rotated about a fulcrum.

In front of the upper beam 41 (downward in FIG. 6)
While the protrusion 110 is provided on the rotating frame 80, the hook 11 having a shape engageable with the protrusion 110 is provided on the rotating frame 80.
2 is rotatably mounted around the pin 111, and the head side end of the hydraulic cylinder 114 is rotatably connected to the rotary frame 80 via the pin 113. The tip of the rod of this hydraulic cylinder 114 is pin 116.
The hook 112 is rotatably connected to the hook 112. The hook 112 is engaged with the protrusion 110 by the expansion and contraction operation of the hydraulic cylinder 114 to rotate the frame 8.
It is possible to switch between a locked state in which the position 0 is fixed (solid line in FIG. 6) and an unlocked state in which the hook 112 and the projection 110 are disengaged from each other to rotatably release the rotating frame 80. There is.

Next, a continuous trench excavation method using this device will be described.

1) Penetration work of trench excavation body 22 Before excavation of a trench, the trench excavation body 22 is previously penetrated into the ground. As the procedure, first, the revolving structure 14 is moved to the traveling structure 13.
The rotation drive device 23 of the leader 16 and the trench excavation body 22 is slid to a position farthest from the rotation frame 80 while being rotated 90 degrees with respect to the traveling direction of.

Next, the unit 24 at the upper end and the unit 24 at the lower end are directly connected to each other, and the short excavation chain 30 is hung between the upper and lower sprockets 26 and 28 attached to the unit 24 and mounted on the leader 16. Then, while the excavation chain 30 is driven by the operation of the rotary drive device 23, the entire trench excavation body 22 is lowered and penetrates into the ground. After the penetration, the trench excavation body 22 is pulled up to the ground again, and a new unit 24 is interposed between the upper and lower units 24 this time.
Correspondingly, the excavation chain 30 is also extended and lengthened so that the excavation chain 30 can be hung between the sprockets 26 and 28 in the same manner as the first penetration, and then 2 Perform the second penetration operation.

Thereafter, the penetration operation similar to the above is repeated while the units 24 are sequentially interrupted, so that the trench excavation body 22 having a sufficient vertical dimension is finally penetrated into the ground leaving the upper portion thereof. You can

Incidentally, the rotating frame 80 has a structure as shown in FIGS.
6, the solid line position of FIG. 6, that is, the position where the leader 84 is located at the foremost position is rotated, and the protrusion 110 and the hook 112 are engaged and locked. Further, the reader 84 is rotated to an angular position where the respective excavating shafts 90 are located at the frontmost position (that is, an angular position where the excavating shafts 90 are arranged in a direction parallel to the traveling direction of the base machine 10).

2) Excavation work for the straight part of the groove 38 (No. 1) The groove excavation body 22 is penetrated as described above to form the excavation chain 30.
The base machine 10 is made to travel while driving. Thereby, as shown in FIGS. 1 and 2, the linear groove 38 can be continuously excavated in the same direction as the traveling direction. This base machine 10 is driven by the base machine 10
Stop when the point reaches a point slightly before the predetermined corner.

3) Preliminary Drilling Work The excavation shaft drive device 88 is operated to rotate and drive the respective excavation shafts 90 at the same time. In this state, the excavation shaft drive device 88 and the excavation shaft 90 are lowered to place the excavation shaft 90 on the ground. Penetrate at the same time. As a result, at the end of the trench 38 that is currently being excavated,
Three circular holes H that overlap each other will be drilled. After that, the excavation shaft 90 is once pulled up, and the leader 84 is rotated in the clockwise direction when viewed from above, whereby the angular position as shown in FIG.
Is positioned at an angular position such that the hole is located to the left of the hole H, and then the excavation shaft 90 is simultaneously penetrated again. This allows
A new hole H will be additionally drilled following the hole H.

4) Excavation shaft retracting work After the excavation shaft 90 is pulled up, the protrusion 110 and the hook 1
The cylinder 12 is disengaged and unlocked, and the hydraulic cylinder 104 is contracted to rotate the rotating frame 80 to the position shown in FIG. This work is for avoiding interference between the groove excavation body 22, the leader 84, and the excavation shaft 90 during the next groove excavation work.

5) Straight section excavation work of the groove 38 (Part 2) While the excavation chain 30 of the groove excavation body 22 is driven, the slide cylinder 54 is operated to move the sliders 50 and 52, the leader 16 and the groove excavation body 22. Slide in the direction toward the hole H together. As a result, the straight portion of the groove 38 is extended and excavated. Then, the slide drive is stopped at the position where the slider 55 of the slide cylinder 54 reaches the end (the position in FIG. 9).

6) Excavation work of the corner portion (curved portion) of the groove 38 While the excavation chain 30 of the groove excavation body 22 is driven,
By expanding and contracting the hydraulic cylinder 64, the leader 16 and the trench excavation body 22 are integrally rotated in the clockwise direction in FIG. 9. As a result, a curved (substantially arcuate) corner groove corresponding to the trajectory of the groove excavation body 22 is excavated.

Here, conventionally, as described above, the trench excavation body 2 is used.
In 2, the portion other than the digging blade 32 (unit 24, etc.) is directly pressed against the ground, so the digging resistance is very high,
Especially when the ground is hard, there is a possibility that the excavation may not be possible. However, in the method shown in this embodiment, when the groove excavation body 22 is turned, at least a part of the ground hit by a portion other than the excavation blade 32 is reached. By setting the position of the leader 84 so as to excavate the hole H, the passage resistance of the excavating blade 32 can be eliminated at the position where the hole H has been drilled, and the ground around the hole H can also be eliminated. It can be easily collapsed, and the passage resistance of the trench excavation body 22, that is, the excavation resistance can be greatly reduced as a whole.

Note that such reduction of excavation resistance can be realized by breaking at least a part of the region in advance, and in addition to the drilling using the auger head 92 as described above, a ground drill and various other types. It is possible to use the machine for drilling. Further, it is not always necessary to remove the soil in order to destroy the ground in the above area, and it is possible to reduce the excavation resistance simply by disturbing the soil in the ground.

When carrying out the method of the present invention, the drilling machine and the groove excavating machine may be separately prepared. For example, the base machine 10 is omitted, the leader 16 is directly installed at a predetermined position, a dedicated drilling machine is used to drill a predetermined area, and then the groove excavation body 22 is rotated about the leader 16. You may make it excavate a curved ditch. However, as shown in each of the drawings, if both the groove excavation means and the hole excavation means are mounted and integrated in one base machine 10, the equipment can be simplified and the running of the base machine 10 can be performed. Thus, it is possible to easily carry the groove excavating means and the hole excavating means, and further, there is an advantage that the base machine 10 travels while penetrating the groove excavating body 22 to freely excavate a linear groove having a desired length.

Further, if the groove excavation body 22 is configured to be slidable by using the portal frame 40 and the like, the groove excavation body 22 is continuously slid and swung to form a straight groove and a curved groove. The advantage of continuous and smooth excavation is obtained. In particular, if the excavating shaft 90 and its penetrating means can be retracted from a predetermined penetrating position by rotating the rotating frame 80 or the like as described above, the excavating shaft can be kept stationary with the base machine 10. 90 etc. and trench excavation body 22
There is an advantage that the groove excavation body region can be freely expanded by the groove excavation body 22 while reliably avoiding the interference.

When the above-mentioned excavating shafts 90 are used, the number thereof is not particularly limited, and a single excavating shaft 90 may be used, or two or four or more excavating shafts 90 may be simultaneously penetrated. However, if the hole excavating means that simultaneously penetrates a plurality of excavation shafts 90 is used as described above, the diameter of each excavation shaft 90 can be suppressed to a small value, and a hole can be drilled in an area suitable for the turning trajectory of the groove excavation body 22. There is.

Further, as in the above embodiment, the reader 8
If the excavation shaft 90 and its penetrating means can be rotated around the vertical axis by using 4, etc., the excavation shaft 90 can be penetrated at a plurality of positions by this rotation, so that a wider range of holes can be drilled. Is obtained.

In the present invention, the means for turning the groove excavation body is not particularly limited, and the groove excavation body 22 may be turned by turning the turning body 14 in the base machine 10, for example.

[0049]

As described above, according to the present invention, when the groove excavation body is swung to excavate a curved groove, when the groove excavation body is swiveled in advance, other than the excavating blade in the groove excavation body. Since at least a part of the ground that directly hits the part is collapsed, it is possible to significantly reduce the turning resistance of the above-mentioned trench excavation body, that is, the excavation resistance, and even when the ground is relatively hard. It has the effect of excavating a curved ditch.

Further, according to the present invention, an endless body having an excavating blade on the surface is hung between upper and lower rotating bodies, and a groove excavating body,
And a supporting member for excavating the groove excavation body so as to be rotatable about a vertical axis and capable of moving up and down, and the vertical axis while operating the groove excavation body with the groove excavation body penetrating into the ground. In a continuous groove excavating device which is configured to excavate a curved groove by turning around, the groove excavating support member is connected with a hole excavating means for excavating a hole in the ground by penetration of an excavating shaft. With one device, both ground breaking work and excavation work of a curved groove in the above area can be performed, and the facility can be simplified.

Here, if the hole excavating means simultaneously penetrates a plurality of horizontal excavating shafts, the diameter of each excavating shaft is kept small and the swirl trajectory of the trench excavating body is well accommodated. The effect that suitable drilling is possible is obtained.

Further, according to the present invention, there is provided a penetrating means for holding the excavating shaft and penetrating it into the ground, and a rotation supporting means for rotatably supporting the penetrating means around the vertical axis. By appropriately rotating the penetrating means to carry out the penetrating work of the excavating shaft at a plurality of positions, it is possible to obtain the effect of drilling a wider area.

Further, as the groove excavating support member, there are provided a swivel support member which can swivel around the vertical axis and can be moved up and down, and a slide support member which slidably supports the swivel support member in the horizontal direction. According to the present invention, in which the hole excavating means is connected to the slide support member, the swivel support member and the groove excavation body are slid, and then the groove excavation body is swung so that a straight groove and a curved groove are formed. It is possible to obtain the effect of continuously and smoothly excavating.

In this case, the hole excavating means can penetrate the excavation shaft into at least a part of the ground on which the portion other than the excavating blade of the groove excavating body directly hits when the groove excavating body slid to a predetermined position turns. If it is connected to the slide support member so as to be movable between a penetration position and a retracted position further from the groove excavation body than the penetration position,
After the excavation shaft is penetrated at the penetration position, the hole excavation means is retracted to the retracted position to avoid the interference between the hole excavation means and the groove excavation body, thereby freely expanding the excavation area by the groove excavation body. The effect that can be obtained is obtained.

Further, by mounting the groove excavation body, the groove excavation support member, and the hole excavation means on a traveling body that travels on the ground, in addition to facilitating their transportation, the groove excavation body is also grounded. By running the traveling body while penetrating inside, a straight groove having a desired length can be freely excavated.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional plan view showing a state where a linear groove is excavated by running a base machine according to an embodiment of the present invention.

FIG. 2 is a front view showing the excavated state.

FIG. 3 is a side view of the groove excavation device in the above embodiment.

FIG. 4 is a side view showing a rotation means of a groove excavation leader in the groove excavation device.

FIG. 5 is a plan view of the rotating means.

FIG. 6 is a partial cross-sectional plan view showing a hole excavating means and its peripheral structure in the groove excavating device.

FIG. 7 is a partial cross-sectional plan view showing a state in which the leader for hole excavation is swung in the above embodiment.

FIG. 8 is a partial cross-sectional plan view showing a state in which the hole excavating means is retracted in the above embodiment.

FIG. 9 is a partial cross-sectional plan view showing how the groove excavation body is further slid and swung in the above-described embodiment.

FIG. 10 is an overall front view showing an example of a conventional curved groove excavating device.

11 (a), (b) and (c) are schematic plan views showing a conventional method for excavating a curved groove.

FIG. 12 is a plan view showing a region in which a portion other than the excavating blade is pressed against the ground when the trench excavation body is turned in the above method.

[Explanation of symbols]

 13 traveling body 16 leader (swivel support member) 22 groove excavation body 26, 28 sprocket (rotating body) 30 excavation chain (endless body) 32 excavation blade 40 portal frame (slide support member) 80 rotating frame (rotating support) Member configuration) 82 Leader holding ring (configuration of rotation support member) 88 Excavation shaft drive device 90 Excavation shaft

Claims (8)

[Claims] 1. An endless body having a digging blade on the surface is hung between upper and lower rotating bodies to penetrate a trench excavation body into the ground,
In a method of excavating a curved groove by turning around the vertical axis while operating the groove excavation body, at least the ground on which a portion other than the excavation blade of the groove excavation body directly hits when the groove excavation body is turned. A method for excavating a curved groove, characterized in that the curved excavation body is turned to excavate the curved groove after a part of the curved excavation body is disintegrated. 2. The method for excavating a curved groove according to claim 1, wherein when the groove excavation body is turned, the excavation shaft penetrates into at least a part of the ground directly contacted by a portion other than the excavation blade of the groove excavation body. A method for excavating a curved groove, which comprises excavating a hole by drilling. 3. A groove excavation body in which an endless body having an excavation blade on its surface is hung between upper and lower rotating bodies, and excavation for supporting the groove excavation body so as to be rotatable about a vertical axis and capable of moving up and down. For excavating a curved groove by rotating the groove excavated body around the vertical axis while operating the groove excavated body in a state where the groove excavated body penetrates into the ground. In the above-mentioned groove excavating support member, a hole excavating device for excavating a hole in the ground by penetrating an excavating shaft is connected. 4. The curved groove excavating device according to claim 3, wherein the hole excavating means simultaneously penetrates a plurality of horizontal excavating shafts. 5. The curved groove excavating device according to claim 3 or 4, wherein as the hole excavating means, a penetrating means for holding the excavating shaft and penetrating it into the ground, and the penetrating means around a vertical axis. A curved groove excavating device, comprising: 6. The curved groove excavating device according to claim 3, wherein the groove excavating body is supported as the groove excavating support member so as to be rotatable about the vertical axis and movable up and down. An excavation device for a curved groove, comprising: a swivel support member; and a slide support member that slidably supports the swivel support member in a horizontal direction, and the hole excavation means is connected to the slide support member. 7. The excavation device for a curved groove according to claim 6, wherein when the groove excavating body that has slid to a predetermined position by the hole excavating means turns, a portion of the groove excavating body other than the excavating blade directly hits. Characterized in that it is coupled to the slide support member so as to be movable between a penetration position where the excavation shaft can penetrate into at least a part of the ground and a retracted position further from the groove excavation body than the penetration position. Excavation equipment for curved ditch. 8. The curved groove excavating device according to claim 2, wherein the groove excavating body, the groove excavating support member, and the hole excavating means are mounted on a traveling body that travels on the ground. An excavation device for curved ditch characterized by.