JPH10205262A - Edge-cutting earth-discharging method for earth and sand taken in drilling-bucket in earth drill construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to surely execute edge cutting by making use of constitution raising and lowering an edge cutting device, and repeating several times of raising and lowering operation in an edge cutting earth moving method of earth and sand taken in a drilling bucket. SOLUTION: Excavated earth and sand is successively taken in a drilling bucket 3 while successively driving the drilling bucket into the ground, and when earth and sand to be taken in the bucket reaches a specific volume, the first edge cutting operation is executed by pulling out an edge cutting device, and after the drilling bucket 3 is pulled out, the drilling bucket 3 is brought into contact with an earth discharge place such as ground, plate surface, etc., the second edge cutting operation is executed by lowering the edge cutting device. Then, the third edge cutting operation is executed by pulling up the edge cutting device. Then, the bottom cover the drilling bucket 3 is opened, and edge cut earth and sand taken in the drilling bucket is discharged to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth drilling method (hereinafter referred to as "the present method"), that is, an underground (ground) is excavated by using a rotary drilling bucket, and a reinforcing bar is provided in the excavation hole. Basket and ready-mixed concrete (hereinafter referred to as ready-mixed concrete)
TECHNICAL FIELD The present invention relates to a method for discharging earth and sand from a drilling bucket in a drilling bucket for constructing a concrete pile or the like by filling the soil.

[0002]

2. Description of the Related Art As is well known, a drilling bucket is an excavator according to the above-mentioned construction method, which is provided with an excavating blade and a bottom cover that can be freely opened and closed at the bottom, and removes soil while rotating the drilling bucket and the excavating blade. Excavation work and work of taking this excavated soil (excavated soil) into the drilling bucket from the opening of the bottom lid are repeatedly performed to excavate underground, and the drilling bucket is filled with excavated soil ( The earth and sand in this state are taken in as earth and sand.) After this pulling-out operation, the bottom lid of the drilling bucket pulled out to the ground is opened to discharge (discharge and remove) the filled in sediment. In this conventional method, when the sediment is attached to the inner peripheral surface of the drilling bucket,
There is a problem that it is not possible to remove the soil by simply opening the bottom cover.

[0003] As an apparatus for more reliably and smoothly discharging the earth, there is an apparatus for extruding excavated earth and sand in a drilling bucket for an earth drilling method proposed by the present applicant in Japanese Utility Model Application Laid-Open No. Hei 6-74689. The gist is that a rotatable discharging means (for example, a cutter) is provided in a drilling bucket, and an operating means (driving means) for operating (rotating) the discharging means is provided in the drilling bucket. There is disclosed a technique of rotating using a driving means and cutting off sediment taken in a drilling bucket.

[0004]

Problems to be Solved by the Invention
The idea of the issue is that the edge is cut using the operation of the cutter. However, it has been found that mere one edge cutting is not sufficient to reliably edge the sediment taken in on the inner peripheral surface of the drilling bucket due to soil properties, conditions, and the like. There is a problem that the earth is not discharged even if the ground is lifted and the bottom cover is opened.

[0005] In addition, the present invention is a configuration in which cutting is performed by utilizing the rotation of a cutter. Therefore, in a situation in which almost all of the sediment is taken in the drilling bucket, the rotation of the cutter is not necessarily guaranteed, and the problem that the cutter does not function as an edge cutter may be considered.

[0006]

According to the first aspect of the present invention, the edging of the sediment adhering to the inner peripheral surface of the drilling bucket is performed by using the edging means several times, and the edging is used. Thus, it is possible to surely discharge earth and sand taken in the drilling bucket.

That is, the drilling bucket is dug sequentially into the soil, and the excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken-in soil reaches a predetermined amount, the cutting means and the drilling bucket are pulled up. The drilling bucket is brought into contact with a ground discharging surface such as a ground surface, a plate surface, or the like, and the operation of the edging means performs edging of the sediment taken in the drilling bucket at least twice to cut off the sediment taken in the drilling bucket. Thereafter, the bottom cover of the drilling bucket is opened, and the cut-off sediment is discharged to the outside of the drilling bucket.

Another object of the present invention is to utilize a structure for raising and lowering the edge cutting means, and to repeatedly perform the upward and downward movements several times to reliably perform edge cutting.

That is, the drilling bucket is sequentially dug into the soil, and the excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken in reaches a predetermined amount, after the pulling-up operation of the edge cutting means and the edge cutting operation are performed, The drilling bucket is pulled up, the drilling bucket is brought into contact with a ground discharging place such as the ground, a plate surface, or the like, and the cutting operation of the sediment taken in the drilling bucket is performed by lowering the cutting means.
Subsequently, a margining operation of the sediment taken in the drilling bucket is performed by pulling up the margining means, and thereafter, a bottom cover of the drilling bucket is opened, and the margined sediment is discharged outside the drilling bucket. This is a method for cutting off earth and sand that is tackled inside a drilling bucket in the earth drilling method.

A third object of the present invention is to effectively use the conventional drilling bucket equipment for the edge cutting means and to operate the edge cutting means reliably and smoothly.

[0011] That is, a rod provided with edging means on a kelly bar of a drilling bucket, an attachment body attached to the rod and housed in the drilling bucket, and an edging plate inscribed in the drilling bucket provided on the mounting plate And a marginal earth removal method for sediment working in a drilling bucket in the earth drill method.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to FIGS.

A drilling bucket is suspended from a heavy equipment (not shown) via a rod connected to a kelly bar (not shown), and the suspended drilling bucket is suspended in a drill hole H (see FIG. 1).

The drilling bucket has a hole bottom H1 of the drilling hole H.
When you reach, rotate the drilling bucket,
The earth and sand excavated with the excavation blade (excavated earth and sand) is taken from the entrance,
Take in the drilling bucket (see FIG. 2).

When a predetermined amount (one example) of excavated earth and sand is taken into the drilling bucket, the drilling bucket is pulled up. That is, the edge cutting plate (short cylindrical iron plate) is moved by the lifting operation of the drilling bucket,
After cutting off the sediment taken in from the inner peripheral surface of the drilling bucket, it is pulled up to the ground (see Fig. 3).

After the drilling bucket is pulled up, the drilling bucket is landed on the ground at the discharging site, and the rod is lowered to again cut off the sediment taken in from the inner peripheral surface of the drilling bucket (FIG. 4). After performing the second trimming, the bottom lid is unlocked (either manual or automatic is possible), and the third trimming is performed by pulling up the drilling bucket (see FIG. 5). After this third trimming, the drilling bucket is lifted, the bottom cover is opened, and the soil is discharged (see FIG. 6). After the discharge is completed, the drilling bucket is lowered to the ground and the bottom cover is closed (see FIG. 7). As the last operation, the rod is lowered, the bottom lid is locked to the drilling bucket (see FIG. 8), and after being pulled up, it is inserted into the drilling hole (see FIG. 1).

Thereafter, the above operation is repeated. However, depending on various conditions such as soil and weather,
Be increased or decreased.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred example of an apparatus used in the method of the present invention will be described.

This apparatus comprises a rod 2 connected to a kelly bar 1, an upper plate 3a, a side plate 3b, and a bottom cover 3 which can be freely opened and closed.
c, an opening / closing rod 4, a locking device 5 released or locked by the opening / closing rod 4, and a drilling bucket 3 loosely fitted to the rod 2 comprising a pivot 6 of the bottom cover 3c.
And a rim plate 7 provided in the drilling bucket 3 and a mounting plate 8 provided on the rod 2 for supporting the rim plate 7 as main components.

The drilling bucket 3 is in contact with the hole bottom H1 of the excavation hole H (see FIG. 2), or the drilling bucket 3 is in contact with the ground GL (see FIG. 4).
In the restricted state, the rod 2 is inserted into the drilling bucket 3. When a load is applied, such as a state in which the excavated earth R is taken into the drilling bucket 3, the rod 2 is pulled out of the drilling bucket 3. That is, the rod 2 is provided in the drilling bucket 3 so as to be freely inserted and removed. Further, the edge cutting plate 7 can be freely moved up and down along the inner peripheral surface 3d of the drilling bucket 3 by utilizing the removability of the rod 2. By this raising and lowering, the adhesion between the taken-in sediment R1 and the inner peripheral surface 3d is released, that is, an edge trimming operation is performed (movements indicated by broken lines in FIGS. 3, 4, and 5).

Although not shown, a method of individually rotating the edge cutting plate 7 or a method of performing the operation simultaneously with the elevating operation can be adopted. In addition, the edging plate 7 is an example of the edging operation, and other edging means such as an edging device and a mechanism exhibiting a similar function are also included in the scope of the present invention.

[0022]

According to the first aspect of the present invention, when the drilling bucket is sequentially dug into the soil and the excavated earth and sand is taken into the drilling bucket, the pulling-up operation and the cutting operation of the cutting means of the drilling bucket are performed. After that, it is configured to abut on the earth discharging place, perform at least two edge cutting operations by lowering and pulling up the edge cutting means, and then open the bottom cover to discharge the edged taken-in earth and sand. Utilizing these several times of cutting, reliable and smooth cutting of the sediment taken in on the inner peripheral surface of the drilling bucket can be achieved, and using this trimming, reliably taking out the sediment taken in the drilling bucket. And the like.

According to a second aspect of the present invention, at least three edge cutting operations, that is, edge cutting by raising, lowering and raising the drilling bucket are performed, and the close contact between the inner peripheral surface of the drilling bucket and the sediment taken in is released. Then, the bottom cover is opened to discharge the soil. Therefore, by raising and lowering the edge cutting means, the edge can be achieved with a reliable and simple operation, and by repeating this raising and lowering several times,
It has the effect of achieving more reliable edge cutting. Further, repeating this ascending and descending several times is a normal operation, and there is no occurrence of trouble due to malfunction.

According to a third aspect of the present invention, there is provided a method in which a rod is connected to a kelly bar, and an edge plate in a drilling bucket is operated by using a pulling up and lowering (elevating) operation of the rod. Therefore, the present invention has an effect that an efficient earth removal operation can be performed irrespective of substantially the same operation as the conventional method, or that the present invention can be implemented by effectively using the conventional device.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a state in which a suspended drilling bucket is suspended in a digging hole and suspended in a heavy equipment.

FIG. 2 shows a drilling bucket reaching the bottom of a borehole,
It is a schematic diagram of the state which takes in the earth and sand dug up by the excavation blade from the entrance into the drilling bucket.

FIG. 3 is a schematic diagram showing a state in which excavated earth and sand is taken into a drilling bucket, and the edge is cut by an edge plate by a lifting operation of the drilling bucket.

FIG. 4 shows a state in which after the drilling bucket is pulled up, the drilling bucket lands on the ground at the earth discharging place, and the rod is lowered to again cut off the sediment captured on the inner peripheral surface of the drilling bucket. FIG.

FIG. 5 is a schematic diagram showing a state where a third edge cutting is performed by pulling up a drilling bucket;

FIG. 6 is a schematic view showing a state where a drilling bucket is lifted up after a third edge trimming is performed, a bottom cover is opened, and soil is discharged.

FIG. 7 is a schematic view showing a state in which discharge has been completed.

FIG. 8 is a schematic diagram showing a state in which a drilling bucket is lowered to the ground and a bottom cover is closed after completion of discharging.

FIG. 9 is a schematic cross-sectional view of a state in which an edge plate of a drilling bucket is pulled up.

FIG. 10 is a schematic cross-sectional view of a state in which an edge plate of a drilling bucket is lowered.

FIG. 11 is a perspective view of a trim plate.

FIG. 12 is a schematic cross-sectional view illustrating a relationship between a drilling bucket and an edge plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Kelly bar 2 Rod 3 Drilling bucket 3a Upper plate 3b Side plate 3c Bottom cover 3d Inner peripheral surface 4 Opening / closing rod 5 Locking device 6 Pivot part 7 Edge cutting plate 8 Mounting plate H Drilling hole H1 Hole bottom GL Ground R Drilling soil R1 Taking in sand

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[Procedure amendment]

[Submission date] January 29, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Edge cutting dumping method of drilling bucket uptake sediment in the earth drill method [Title of the Invention]

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth drilling method (hereinafter referred to as "the present method"), that is, an underground (ground) is excavated by using a rotary drilling bucket, and a reinforcing bar is provided in the excavation hole. Basket and ready-mixed concrete (hereinafter referred to as ready-mixed concrete)
About drilling bucket uptake sand edge cutting soil removing method in drilling bucket for constructing a concrete pile or the like by filling.

[0002]

2. Description of the Related Art As is well known, a drilling bucket is an excavator according to the above-mentioned construction method, which is provided with an excavating blade and a bottom cover that can be freely opened and closed at the bottom, and removes soil while rotating the drilling bucket and the excavating blade. Excavation work and work of taking this excavated soil (excavated soil) into the drilling bucket from the opening of the bottom lid are repeatedly performed to excavate underground, and the drilling bucket is filled with excavated soil ( The earth and sand in this state are taken in as earth and sand.) After this pulling-out operation, the bottom lid of the drilling bucket pulled out to the ground is opened to discharge (discharge and remove) the filled in sediment. In this conventional method, when the sediment is attached to the inner peripheral surface of the drilling bucket,
There is a problem that it is not possible to remove the soil by simply opening the bottom cover.

[0003] As an apparatus for more reliably and smoothly discharging the earth, there is an apparatus for extruding excavated earth and sand in a drilling bucket for an earth drilling method proposed by the present applicant in Japanese Utility Model Application Laid-Open No. Hei 6-74689. The gist is that a rotatable discharging means (for example, a cutter) is provided in a drilling bucket, and an operating means (driving means) for operating (rotating) the discharging means is provided in the drilling bucket. It rotated by using the driving means, the drilling bucket capture
Technology for divorce only sediment has been disclosed.

[0004]

Problems to be Solved by the Invention
The idea of the issue is that the edge is cut using the operation of the cutter. However, it has been found that mere one edge cutting is not sufficient to reliably edge the sediment taken in on the inner peripheral surface of the drilling bucket due to soil properties, conditions, and the like. There is a problem that the earth is not discharged even if the ground is lifted and the bottom cover is opened.

[0005] In addition, the present invention is a configuration in which cutting is performed by utilizing the rotation of a cutter. Therefore, in a situation in which almost all of the sediment is taken in the drilling bucket, the rotation of the cutter is not necessarily guaranteed, and the problem that the cutter does not function as an edge cutter may be considered.

[0006]

According to the first aspect of the present invention, the edging of the sediment adhering to the inner peripheral surface of the drilling bucket is performed by using the edging means several times, and the edging is used. Thus, it is possible to surely discharge earth and sand taken in the drilling bucket.

That is, the drilling bucket is dug sequentially into the soil, and the excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken-in soil reaches a predetermined amount, the cutting means and the drilling bucket are pulled up. The drilling bucket is brought into contact with a ground discharging surface such as a ground surface, a plate surface, or the like, and the operation of the edging means performs edging of the sediment taken in the drilling bucket at least twice to cut off the sediment taken in the drilling bucket. Thereafter, by opening the bottom lid of the drilling bucket, the edge cutting has been uptake sediment is edge cutting dumping method of drilling bucket uptake soil in ground drilling method, characterized in that the earth removal outside the drilling bucket.

Another object of the present invention is to utilize a structure for raising and lowering the edge cutting means, and to repeatedly perform the upward and downward movements several times to reliably perform edge cutting.

That is, the drilling bucket is sequentially dug into the soil, and the excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken in reaches a predetermined amount, after the pulling-up operation of the edge cutting means and the edge cutting operation are performed, The drilling bucket is pulled up, the drilling bucket is brought into contact with a ground discharging place such as the ground, a plate surface, or the like, and the cutting operation of the sediment taken in the drilling bucket is performed by lowering the cutting means.
Subsequently, a margining operation of the sediment taken in the drilling bucket is performed by pulling up the margining means, and thereafter, a bottom cover of the drilling bucket is opened, and the margined sediment is discharged outside the drilling bucket. which is the edge cutting dumping method of drilling bucket uptake soil in ground drilling method according to claim.

A third object of the present invention is to effectively use the conventional drilling bucket equipment for the edge cutting means and to operate the edge cutting means reliably and smoothly.

[0011] That is, a rod provided with edging means on a kelly bar of a drilling bucket, an attachment body attached to the rod and housed in the drilling bucket, and an edging plate inscribed in the drilling bucket provided on the mounting plate When, in a divorce dumping method of drilling bucket uptake soil in ground drilling method configured.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to FIGS.

A drilling bucket is suspended from a heavy equipment (not shown) via a rod connected to a kelly bar (not shown), and the suspended drilling bucket is suspended in a drill hole H (see FIG. 1).

The drilling bucket has a hole bottom H1 of the drilling hole H.
When you reach, rotate the drilling bucket,
The earth and sand excavated with the excavation blade (excavated earth and sand) is taken from the entrance,
Take in the drilling bucket (see FIG. 2).

If a predetermined amount (one example) of excavated earth and sand is taken into the drilling bucket, the drilling bucket is pulled up. That is, the edge cutting plate (short cylindrical iron plate) is moved by the pulling-up operation of the drilling bucket, and is pulled up to the ground after cutting off the taken-in earth and sand adhered to the inner peripheral surface of the drilling bucket (see FIG. 3).

After the drilling bucket is pulled up, the drilling bucket is landed on the ground at the discharging site, and the rod is lowered to again cut off the sediment taken in from the inner peripheral surface of the drilling bucket (FIG. 4). After performing the second trimming, the bottom lid is unlocked (either manual or automatic is possible), and the third trimming is performed by pulling up the drilling bucket (see FIG. 5). After this third trimming, the drilling bucket is lifted, the bottom cover is opened, and the soil is discharged (see FIG. 6). After the discharge is completed, the drilling bucket is lowered to the ground and the bottom cover is closed (see FIG. 7). As the last operation, the rod is lowered, the bottom lid is locked to the drilling bucket (see FIG. 8), and after being pulled up, it is inserted into the drilling hole (see FIG. 1).

Thereafter, the above operation is repeated. However, depending on various conditions such as soil and weather,
Be increased or decreased.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred example of an apparatus used in the method of the present invention will be described.

This apparatus comprises a rod 2 connected to a kelly bar 1, an upper plate 3a, a side plate 3b, and a bottom cover 3 which can be freely opened and closed.
c, an opening / closing rod 4, a locking device 5 released or locked by the opening / closing rod 4, and a drilling bucket 3 loosely fitted to the rod 2 comprising a pivot 6 of the bottom cover 3c.
And a rim plate 7 provided in the drilling bucket 3 and a mounting plate 8 provided on the rod 2 for supporting the rim plate 7 as main components.

The drilling bucket 3 is in contact with the hole bottom H1 of the excavation hole H (see FIG. 2), or the drilling bucket 3 is in contact with the ground GL (see FIG. 4).
In the restricted state, the rod 2 is inserted into the drilling bucket 3. When a load is applied, such as a state in which the excavated earth R is taken into the drilling bucket 3, the rod 2 is pulled out of the drilling bucket 3. That is, the rod 2 is provided in the drilling bucket 3 so as to be freely inserted and removed. Further, the edge cutting plate 7 can be freely moved up and down along the inner peripheral surface 3d of the drilling bucket 3 by utilizing the removability of the rod 2. By this raising and lowering, the adhesion between the taken-in sediment R1 and the inner peripheral surface 3d is released, that is, an edge trimming operation is performed (movements indicated by broken lines in FIGS. 3, 4, and 5).

Although not shown, a method of individually rotating the edge cutting plate 7 or a method of performing the operation simultaneously with the elevating operation can be adopted. In addition, the edging plate 7 is an example of the edging operation, and other edging means such as an edging device and a mechanism exhibiting a similar function are also included in the scope of the present invention.

[0022]

According to the first aspect of the present invention, when the drilling bucket is sequentially dug into the soil and the excavated earth and sand is taken into the drilling bucket, the pulling-up operation and the cutting operation of the cutting means of the drilling bucket are performed. After that, it is configured to abut on the earth discharging place, perform at least two edge cutting operations by lowering and pulling up the edge cutting means, and then open the bottom cover to discharge the edged taken-in earth and sand. Utilizing these several times of cutting, reliable and smooth cutting of the sediment taken in on the inner peripheral surface of the drilling bucket can be achieved, and using this trimming, reliably taking out the sediment taken in the drilling bucket. And the like.

According to a second aspect of the present invention, at least three edge cutting operations, that is, edge cutting by raising, lowering and raising the drilling bucket are performed, and the close contact between the inner peripheral surface of the drilling bucket and the sediment taken in is released. Then, the bottom cover is opened to discharge the soil. Therefore, by raising and lowering the edge cutting means, the edge can be achieved with a reliable and simple operation, and by repeating this raising and lowering several times,
It has the effect of achieving more reliable edge cutting. Further, repeating this ascending and descending several times is a normal operation, and there is no occurrence of trouble due to malfunction.

According to a third aspect of the present invention, there is provided a method in which a rod is connected to a kelly bar, and an edge plate in a drilling bucket is operated by using a pulling up and lowering (elevating) operation of the rod. Therefore, the present invention has an effect that an efficient earth removal operation can be performed irrespective of substantially the same operation as the conventional method, or that the present invention can be implemented by effectively using the conventional device.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a state in which a suspended drilling bucket is suspended in a digging hole and suspended in a heavy equipment.

FIG. 2 shows a drilling bucket reaching the bottom of a borehole,
It is a schematic diagram of the state which takes in the earth and sand dug up by the excavation blade from the entrance into the drilling bucket.

Fig. 3 Excavated earth and sand is taken into the drilling bucket,
It is a schematic diagram in the state where the edge was cut by the edge plate by the pulling operation of the drilling bucket.

FIG. 4 shows a state in which after the drilling bucket is pulled up, the drilling bucket lands on the ground at the earth discharging place, and the rod is lowered to again cut off the sediment captured on the inner peripheral surface of the drilling bucket. FIG.

FIG. 5 is a schematic diagram showing a state where a third edge cutting is performed by pulling up a drilling bucket;

FIG. 6 is a schematic view showing a state where a drilling bucket is lifted up after a third edge trimming is performed, a bottom cover is opened, and soil is discharged.

FIG. 7 is a schematic view showing a state in which discharge has been completed.

FIG. 8 is a schematic diagram showing a state in which a drilling bucket is lowered to the ground and a bottom cover is closed after completion of discharging.

FIG. 9 is a schematic cross-sectional view of a state in which an edge plate of a drilling bucket is pulled up.

FIG. 10 is a schematic cross-sectional view of a state in which an edge plate of a drilling bucket is lowered.

FIG. 11 is a perspective view of a trim plate.

FIG. 12 is a schematic cross-sectional view illustrating a relationship between a drilling bucket and an edge plate.

[Description of Signs] 1 Kelly bar 2 Rod 3 Drilling bucket 3a Upper plate 3b Side plate 3c Bottom cover 3d Inner peripheral surface 4 Opening / closing rod 5 Locking device 6 Pivot support 7 Edge cutting plate 8 Mounting plate H Drilling hole H1 Hole bottom GL Ground R Drilling earth and sand R1 Uptake earth and sand

Claims (3)

[Claims] The drilling bucket is dug into the soil sequentially, and the excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken in becomes a predetermined amount, the cutting means and the drilling bucket are pulled up, The drilling bucket is brought into contact with a ground discharging surface such as a ground surface, a plate surface, or the like, and the operation of the edging means performs edging of the sediment taken in the drilling bucket at least twice to cut off the sediment taken in the drilling bucket. Thereafter, the bottom cover of the drilling bucket is opened, and the cut-off captured earth and sand is discharged to the outside of the drilling bucket. 2. A drilling bucket is dug into the soil sequentially, and excavated earth and sand is sequentially taken into the drilling bucket. When the amount of the taken in becomes a predetermined amount, after the pulling-up operation and the cutting operation of the cutting means are performed, The drilling bucket is pulled up, the drilling bucket is brought into contact with an earth discharging place such as the ground, a plate surface, or the like, and the cutting operation of the sediment taken in the drilling bucket is performed by lowering the cutting means. The earth drilling method according to claim 1, further comprising performing a margining operation of the sediment taken in the drilling bucket, thereafter, opening a bottom cover of the drilling bucket and discharging the trimmed captured sediment outside the drilling bucket. Drilling buckets Efforts to remove earth and sand. 3. A rod provided on the kelly bar of a drilling bucket, wherein the rimping means is mounted on the rod and is mounted on the drilling bucket, and a rim which is inscribed in the drilling bucket provided on the mounting body. 3. The method of claim 1 or 2, wherein the earth drilling method comprises the steps of: