JPH06307178A - Excavation of ground - Google Patents

Abstract

PURPOSE:To make it possible to excavate the ground vertically for an excavation method of the ground by using a bucket. CONSTITUTION:A bucket 17 is rotated and is filled with excavated earth from a cutting edge of the bottom thereof, and in the case the bucket is filled with earth, it is pulled out to open the bottom for moving earth to excavate the ground, and in the case the bucket reaches the inclined hard soil, it is pulled out. The bucket 17 is replaced with a bucket 11 with a steel pipe inserting the bucket main body to the inside of the longer steel pipe equipped with bits to the lower end. The bucket 11 is rotated and is filled with earth pressed into the steel pipe while excavating the hard soil with the bits 13 on the front end of the steel pipe from a cutting edge of the bottom of the bucket main body, and in the case the bucket main body is filled with earth, the bucket is pulled out to open the bottom for moving earth, and after the hard soil is started, the bucket is replaced with the initial one to drive forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of excavating ground using a drilling bucket.

[0002]

2. Description of the Related Art Conventionally, an earth drill method has been known as a method of excavating the ground for drilling a place.

In this earth drilling method, a drilling bucket (hereinafter referred to as "bucket") is rotated to scrape the soil from the bottom edge, and when the soil fills the bucket, the bucket is pulled up from the excavation hole to open the bottom. Depending on the type of soil, there is a method of excavating with bare earth without protection of the hole wall, and a method of excavating the ground while maintaining the hole wall with muddy water such as bentonite or hydrostatic pressure. is there.

[0004]

Therefore, the bucket is
If the ground is ordinary soil such as a sand layer or a gravel layer, it is possible to excavate the ground vertically.

However, as shown in FIG. 7, when the soil to be excavated is a stratum in which the ordinary soil 3 is stacked on the hard soil 1 such as the inclined soil layer, the bucket 5 excavated from the ordinary soil 3 When the bucket reaches the hard ground 1, the bucket 5 flows in the lower direction along the inclination (the boundary between the hard ground 1 and the general soil 3), and when the excavation is continued in this state, the drill hole 7
There was a drawback that it would bend.

In the figure, 9 is a kelly bar connected to the bucket 5. By rotating the kerry bar 9, the bucket 5 is rotated, and by expanding and contracting the kerry bar 9, the bucket 5 is placed inside the excavation hole 7. Is designed to go up and down.

The present invention has been devised in view of such an actual situation, and when excavating the ground with a bucket, it is a case where the ground is a stratum in which general soil is piled up on the hard ground where the ground is inclined. Even so, it is an object to provide a ground excavation method capable of excavating the ground in the vertical direction.

[0008]

In order to achieve such an object, the method of excavating the ground according to the present invention is such that when the bucket is rotated to scrape the soil from the bottom blade, the soil is filled in the bucket. , The bucket is pulled up from the excavation hole, the bottom is opened, the soil is discharged and the ground is sequentially dug up, and when the bucket reaches the sloping hard ground, the bucket is pulled up, and this is a long length with many bits attached at the lower end. Replace with a steel pipe pipe bucket in which the bucket body is inserted into the steel pipe pipe, and rotate the steel pipe pipe bucket,
The hard ground is excavated with a bit at the tip of the steel pipe pipe, and the soil pressed into the steel pipe pipe is cut from the bottom edge of the bucket body.When the soil fills the bucket body, the bucket with the steel pipe pipe is pulled up and the bucket body After cutting the hard ground by repeating the process of opening the bottom and discharging the soil,
Replace the bucket with steel pipe with the original bucket,
The hard ground is dug with the bucket.

[0009]

According to the method of the present invention, first, the bucket is rotated to scrape the soil from the bottom blade, and when the soil is filled in the bucket, the bucket is pulled up from the excavation hole to open the bottom and discharge the soil. The general soil is sequentially dug.

Then, when the bucket reaches the sloping hard ground, the bucket is pulled up, and this is turned into a bucket with a steel pipe pipe in which the bucket body is inserted into a long steel pipe pipe with a large number of bits attached to the lower end. Replace, rotate the bucket with the steel pipe, excavate the hard ground with the bit at the tip of the steel pipe, and then squeeze the soil press-fit into the steel pipe from the blade opening at the bottom of the bucket body, and the soil is placed inside the bucket body. When it is filled, the process of pulling up the bucket with steel pipes to open the bottom of the bucket body and discharging the soil is repeated to cut the hard ground.

After the end of the slicing work, the bucket with the steel pipe is replaced with the original bucket and the hard ground is excavated, whereby vertical excavation holes are drilled from the general soil to the hard ground. The Rukoto.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The same parts as those in the conventional example shown in FIG. 7 are designated by the same reference numerals.

FIG. 1 shows a bucket with a steel pipe used in one embodiment of the method of the present invention. The bucket with a steel pipe 11 has a long steel pipe 15 having a large number of bits 13 at its lower end and the steel pipe. It is composed of a bucket body 17 inserted into the pipe 15.

The bucket body 17 is connected to the kerry bar 9 like the conventional bucket 5 shown in FIG. 7, and the rotation of the kerry bar 9 scrapes the soil from the bottom blade (not shown). The soil can be discharged by putting it in and opening the bottom 19. The bucket body 17 is bolted into the steel pipe 15.

A large number of bits 13 are welded to the inner peripheral surface of the lower end of the steel pipe pipe 15 in the same direction, and the upper and lower ends of the steel pipe pipe 15 are elongated so as to project vertically from the bucket body 11. It is set to various dimensions.

In the center of the upper end of the steel pipe 15,
A tubular kelly bar guide 21 is attached via a stay 23, and the kerry bar 9 is inserted through the kelly bar guide 21.

In addition, in FIG. 1, 25 is a bolt, and 27 is a pin for connecting the bucket body 17 to the kelly bar 9. Thus, one embodiment of the method of the present invention is carried out as follows using the bucket 11 with a steel pipe.

As shown in FIG. 2, as in the conventional case, first, the bucket 5 is rotated by the kelly bar 9 to scrape the soil from the bottom blade (not shown), and when the soil fills the bucket 5, The kelly bar 9 is retracted and the bucket 5 is drilled 7
The soil 5 is pulled up from the bottom, the bottom 5a is opened, the soil is discharged, and the general soil 3 is sequentially excavated vertically.

Then, when the excavation of the general soil 3 progresses and the bucket 5 reaches the sloping hard ground 1 as shown in FIG. 3,
After the bucket 5 is pulled up from the excavation hole 7 by retracting the kelly bar 9 and replaced with the bucket 11 with the steel pipe, the bucket 11 with the steel pipe is rotated by the kelly bar 9 and the excavation hole is formed as shown in FIG. If it is lowered to the hard ground 1 in 7, the bit 13 at the tip of the steel pipe 15 will excavate the hard ground 1 vertically.

Thus, as the hard ground 1 is excavated by the bit 13, the drilled soil (core) is formed in the steel pipe 15.
However, the soil press-fitted into the steel pipe pipe 15 is scraped off from the blade opening at the bottom of the bucket body 17, and when the soil fills the bucket body 17, the bucket 11 with the steel pipe pipe
Is lifted up from the excavation hole 7, the bottom 19 of the bucket body 17 is opened, and the soil is discharged, and the hard ground 1 is cut in the vertical direction as shown in FIG.

Then, in this way, the bucket 1 with the steel pipe
After finishing cutting the hard ground 1 according to No. 1, the bucket 11 with the steel pipe is pulled up and replaced with the original bucket 5, and the bucket 5 is cut along the cut hole 7'as shown in FIG. When the hard ground 1 is dug, the vertical excavation hole 7 is drilled from the general soil 3 to the hard ground 1.

As described above, according to the method of the present invention, the conventional bucket 5 can be used even when the soil is a stratum in which the general soil 3 is stacked on the hard soil 1 such as the inclined soil layer. The vertical excavation hole 7 from the general soil 3 to the hard ground 1 is used by properly using the bucket 11 with the steel pipe.
It became possible to excavate.

[0023]

As described above, according to the method of the present invention, even when the ground to be excavated is a stratum in which general soil is piled on a hard ground that is inclined, the conventional bucket and steel pipe By using different buckets, it became possible to excavate vertical drilling holes from ordinary soil to hard ground.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a bucket with a steel pipe used in an embodiment of the method of the present invention.

FIG. 2 is an explanatory diagram showing a conventional soil excavation process using a bucket.

FIG. 3 is an explanatory diagram showing a state in which the bucket reaches the hard ground.

FIG. 4 is an explanatory view showing a state in which the replaced bucket with a steel pipe is set in the excavation hole.

FIG. 5 is an explanatory view showing a cut state of hard ground by a bucket with a steel pipe.

FIG. 6 is an explanatory diagram showing a drilled state of the hard ground by the replaced bucket.

FIG. 7 is an explanatory view showing a drilled state of the hard ground by the conventional bucket.

[Explanation of symbols]

 1 Hard Ground 3 General Soil 5 Bucket 7 Drilling Hole 9 Keriver 11 Bucket with Steel Pipe 13 Bit 15 Steel Pipe 17 Bucket Main Body 19 Bottom 21 Kerryber Guide

Claims (1)

[Claims] 1. When the drilling bucket is rotated to scrape the soil from the bottom edge and when the soil is filled in the drilling bucket, the drilling bucket is pulled up from the drilling hole to open the bottom and discharge the soil to sequentially advance the ground. Then, when the drilling bucket reaches an inclined hard ground, the drilling bucket is pulled up, and the drilling bucket with steel pipe is inserted into a long steel pipe with many bits attached to the lower end. The drilling bucket with steel pipe is rotated, the hard ground is excavated with a bit at the tip of the steel pipe, and the soil press-fitted into the steel pipe is ground from the blade hole at the bottom of the drilling bucket body. When the bucket body is full, pull up the drilling bucket with steel pipes After cutting the hard ground by repeating the process of opening the bottom of the liling bucket body and discharging the soil,
A method of excavating the ground, characterized in that a drilling bucket with a steel pipe is replaced with an original drilling bucket, and the hard ground is excavated by the drilling bucket.