JPH02269231A - Excavating method for curved groove - Google Patents

Abstract

PURPOSE:To easily excavate a curved groove by rotating a earth drill bucket fitted to the arm of a hydraulic shovel, moving the arm downward to excavate a vertical hole, and continuing multiple vertical holes. CONSTITUTION:An earth drill bucket 20 fitted with a rotary driving device 18 is rotatably fitted at the tip of the arm 10 of a hydraulic shovel 4. The bucket 20 is kept vertical, a hydraulic motor is rotated, the arm is moved downward, the bucket 20 is thrust into the ground, and a circular vertical hole 30 is excavated. An upper rotary body 5 is rotated as necessary, a lower running body 6 is laterally moved, the excavation of the vertical hole 30 is repeated, and multiple vertical holes are continued to form a curved groove 3. Even when an existing buried pipe or a surface obstacle exists, the narrow and deep curved groove 3 for burying a pipe can be easily excavated.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a curved trench excavation method used when constructing underground structures such as storage pipes for electric wires, telephone lines, etc., gas pipes, water and sewage pipes, etc. , More specifically, when there are various obstacles such as manholes and telephone poles, 5.
Including the case where a straight groove is formed in a part. ) regarding the direction of drilling.

(Prior Art) As shown in FIGS. 12 and 13, in order to bury, for example, electric wires or telephone line accommodation pipes (PVC pipes or steel pipes) in the sidewalk 1 adjacent to the roadway 2, a hydraulic excavator 4 ( The hydraulic cylinder label 4 has an upper revolving body 5 installed on the lower traveling body 6 via a revolving mount M, a boom 8 which is raised and lowered by a boom cylinder 9 is attached to the upper revolving body 5, and a boom 8 is attached to the tip of the boom 8. The arm l can be rotated freely by the bucket cylinder 11.
Attach the bucket cylinder 1 to the tip of the arm 10.
2 and link 13, and a bucket t5 is attached so as to be rotated via link J4. ) to excavate the groove 3, the expansion and contraction of the boom cylinder 9 and the arm cylinder 11
The arm 10 is moved horizontally by extending the
Then, the bucket cylinder 12 is extended and the bucket 15 is rotated to perform excavation. Arrow R indicates the trajectory of the bucket toe 16 during this excavation work, and when this trajectory R is viewed from above, it draws a straight line. become.

(Problem to be Solved by the Invention) As described above, when excavating the trench 3 with the hydraulic excavator 4 equipped with the conventional excavating bucket 15, the toe 16 of the bucket 15 should draw a straight line when viewed from above. Therefore, when excavating a narrow and deep trench, even if you try to excavate a curved trench 3 as shown in the figure to avoid obstructions 24 such as manholes and telephone poles on the sidewalk 1, or existing underground piping, it will not be possible to excavate. It was possible. If an attempt is made to excavate a curved groove 3 using the hydraulic excavator 4, the bucket 15 will scrape off the sides of the groove 3, resulting in a wide groove, an increase in the amount of excavation, and poor vertical accuracy. There was a risk of damaging existing buried pipes, and there was also the problem of poor depth accuracy.

For this reason, workers have to enter underground trenches and perform manual excavation work, which requires a great deal of effort and time.
In addition, there was a problem in that it was accompanied by operational hazards.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a method for excavating a curved groove, which has advantages such as being able to easily and efficiently excavate a curved groove with good vertical and depth accuracy.

(Means for Solving the Problems) In order to achieve this object, the method for excavating a curved trench according to the present invention is such that an earth drill bucket having a rotational drive device is attached to the arm of a working machine, and the bucket is rotated by the rotational drive device. At the same time, the arm is moved downward to excavate a vertical hole, and a plurality of vertical holes are assembled to form a curved groove. The present invention includes a method of forming a curved groove having a width larger than the diameter of the vertical hole by excavating a plurality of vertical holes in the width direction of the groove.

More specifically, the present invention relates to a method of excavating a one-curve trench by repeating the process of excavating the next vertical hole so as to partially overlap the vertical hole, or from an island or from an existing vertical hole. A construction method in which a vertical hole is excavated by the same operation as above at a location separated by a distance shorter than the diameter, and the process of repeating the process of excavating a vertical hole between these vertical holes by the same operation as above, or , Drill a vertical hole by the same operation as described above, overlapping the -0 part with the existing vertical hole or at a separate location, and drill between these vertical holes by moving horizontally while rotating an earth drill bucket equipped with a sight cutter. This includes construction methods that involve repeated processes.

(Example) The details of the present invention will be explained below with reference to the drawings. FIG. 1 is a plan view showing a state in which a curved groove 3 is being excavated according to the present invention, FIGS. 1 to 3, which are side views showing an example of the earth drill bucket used in the present invention, the same reference numerals as in FIGS. 12 and 13 indicate the same components or parts.

In this embodiment, as shown in FIGS. 1 and 2, an earth drill bucket 20 with a rotary drive device is rotatably attached to the tip of the arm IO of the hydraulic excavator 4. That is, as shown in Fig. 3, the earth drill bucket (hereinafter referred to as bucket) is attached using the bracket 17
A rotary drive device 18 for the bucket 20 consisting of a hydraulic motor 19 is attached to the case of the rotary drive device 18, and a bearing 27 is attached to the case of the rotary drive device 18.
2. The bucket 20 is rotatably attached to the arm 10 via a pin 25, and the bracket 17 is rotatably connected to the arm 10 via the link 13. By being connected by the bin 26, the bucket 20 is mounted so as to rotate around the bin 25 as the bucket cylinder 12 expands and contracts. At the bottom opening of the bucket 20 (bottom M21
The bottom 1i2L is attached so as to be openable and closable around a hinge 22, and includes a locking mechanism 28 for maintaining the bottom 1i2L in a closed state and a lever 23 for releasing the lock. The bottom cover 21 has an excavating claw 33 and an earth and sand introduction part 34.

In this way, the earth drill bucket 20 with the rotary drive device 18 is attached to the tip of the arm 10 of the hydraulic excavator 4,
As shown in FIG. 1, the operation of the lower traveling body 6 moves the excavator body in the direction indicated by the arrow, and the operation of the swinging device 7 causes the upper rotating body 5 to rotate as shown by the arrow l, thereby moving the bucket 20. Then, by operating the boom cylinder 9 and arm cylinder 11 shown in FIG. 2, the bucket 20 is positioned at a small distance from the ground. Accordingly, the swing device 7 and the arm cylinder 11 are operated to accurately set the position of the bucket 20, and the bucket 20 is immediately set again using the bucket cylinder 12. In this way, the bucket 20 is set on the ground. is shown in FIG. 2(A).

Next, as shown in FIG. 2(B), the hydraulic motor 19 is started to rotate the bucket 20, and at the same time, the boom cylinder 9 is contracted to move the arm 10 downward, and the bucket 20 is rotated.
By pushing into the ground, a vertical circular vertical hole 30 is excavated. The vertical hole 30 is formed by repeating the excavation and soil removal using the bucket 20 a necessary number of times depending on the depth of the trench 3 to be excavated. - As an example, groove 3 has a width of 60 CIl and a depth of 2-.

In the present invention, the one-curve groove 3 is formed by repeating the excavation of such vertical holes 30 and making the vertical holes 30 continuous, but there are various modes of continuity.

In the example of FIG. 4 (plan view), the vertical holes 30 are arranged as a, b, c,
This is a construction method in which the curved groove 3 is excavated as a whole by excavating in the order of d, --- while always partially overlapping the existing vertical hole 30 (indicated by X).

In the example of FIG. 5 (plan view), first, as shown by solid lines a and b, the vertical hole 30 is separated by a distance smaller than the diameter of the vertical hole 30 (the distance may be negative, that is, -linear). ) After excavating 2, excavate the part between them as shown by e, then c,
This method forms a curved line 93 as a whole by excavating in f, d, g... In this case, first drill the vertical holes b, c, d, etc. shown by the solid lines, and then drill the vertical holes e, f, g, etc. (or...
..., excavation may be performed in the order of f, e).

In the example of FIG. 6 (plan view) and FIG. 7 (longitudinal cross-sectional view), the vertical hole 30 is viewed from the above distance (in this case, the inclusion may be negative, and l>D may also be satisfied). A sight cutter 31 is installed between the vertical holes 30 on the side of the bucket 20.
and a bucket 20 provided with an opening 32 for introducing excavated soil.
This is a construction method in which the vertical holes 30 are made continuous by moving the vertical holes 30 horizontally as shown by the arrow S (see FIG. 8). In this case, if the depth of the vertical hole 30 is deeper than the height of the bucket 20, the bucket 20 is moved horizontally once, then excavated vertically as shown by arrow t, and then horizontally as shown by arrow U. When implementing this construction method, which involves moving horizontally twice or more, as in the case of Fig. 5, vertical holes a, b, and c are
, d... and then laterally moving the bucket 20 to excavate the area between the vertical holes a and b.
, and excavate the space between them by moving the bucket 20 laterally, then excavating the vertical hole C, and then excavating from the vertical hole C to C by moving the bucket 20 laterally, and then proceeding in the same manner. There is.

When excavating by moving the bucket 20 laterally, a spiral cutter extending from the top to the bottom of the bucket 20 may be used as the side cutter, instead of a plate-shaped side cutter as shown in FIG. good.

In addition, after excavating the trench 3 by the method shown in Figs. 4 and 5, the trench 3 was excavated by the method shown in Figs. 6 and 7.
The groove 3 may be removed from the wall surface by eliminating unevenness on the wall surface.
When cleaning soil that has fallen to the bottom of a bucket, a bucket with a smooth bottom or lid may be used.

The width of the curved groove excavated in each of the above embodiments is preferably 4.
The depth is approximately 0 cm to 100 cm and the depth Is is approximately 2.5 m.

In each of the above embodiments, an example is shown in which a curved groove with a width corresponding to the diameter of the bucket 20 is formed, but as shown in FIG. , it is possible to excavate a groove 3A twice the width of the vertical hole 30. In this case, the order of drilling is to drill vertical holes in columns a, b, c, d, e, m in the longitudinal direction of the groove, then f, g, h, i, j---n (or n-=j
,i.

There is a method of drilling vertical holes in adjacent columns in the order of h, gt f). Also, for each column, a, C, e
...M is excavated, then a vertical hole is made between them, d...(
Or...d, b) and then f, h, j---
After digging -n (or n-1j, h, f), g,
There is a method to excavate with i... (or...i, g). Others a, g, c, j.

After excavating in a zigzag manner as e..., f, b, h, d...
・(or...d, h, b, f) etc.

FIG. 10 shows an example in which a groove 3B having a width larger than the diameter of the vertical hole 30 and smaller than twice the diameter of the vertical hole 30 is formed by forming two vertical holes 3o overlapping in the groove width direction,
In this case as well, the groove 3B is excavated by excavating the vertical hole 30 in any of the sequences shown in FIG.

The curved groove according to the present invention not only has a width of two vertical holes or less than two vertical holes, but also has two or more vertical holes drilled in the groove width direction, so that a groove with a width of more than twice the diameter of the vertical hole can be formed. Excavation is possible.

FIG. 11 is an example of this, and shows an example in which a curved groove 3C having a width more than three times the diameter of the vertical hole 30 is excavated by partially overlapping the vertical holes in each row of A to D. In this case as well, various drilling orders can be considered; for example, multiple vertical holes in row A can be drilled in succession, or one can be drilled one after the other, followed by drilling in between, and then B, C, and D. The same method is used to excavate each row in the same way, or to use continuous or skip-by-one vertical hole drilling as described above for rows A and D, which determine the trench width. A, B, or C.

Possible methods include a method of excavating each longitudinal groove in the D row in the width direction or obliquely to the groove width direction, and a method of excavating in a zigzag pattern. In addition, in FIG. 11, after excavating the vertical holes 30 in rows A and D, the groove 3C can also be excavated by moving the bucket 20 horizontally using the side cutter 31 to excavate the part between them. .

(Effect of the invention) The construction method of claim 1 is a construction method in which a vertical hole is excavated by pushing and rotating an earth drill bucket, and a curved groove is formed by a collection of the vertical holes, and the vertical hole cannot be excavated vertically. Narrow and deep trenches for burying pipes where possible, there is no risk of scraping the walls of the existing trench by excavation, there is no risk of destroying buried pipes whose buried locations are known, and where there are obstacles on the ground surface. It becomes possible to easily excavate curved trenches. Further, since the present invention utilizes the power of a working machine, it is possible to excavate a trench efficiently, and since there is no need for a worker to enter the trench, the danger of the work is reduced.

In addition, a mark indicating the depth of the bucket should be provided on the bucket of the work equipment, rotary drive device case, bucket mounting bracket or arm, etc., and the depth of the bucket should be set by means such as aligning the mark with the ground surface. By doing so, the excavation depth can be set accurately and depth accuracy is improved.

The method of claim 2 forms a curved groove with a width larger than the diameter of the vertical hole by excavating a plurality of vertical holes in the width direction of the groove. It becomes possible to excavate trenches.

According to the construction methods of claims 3 and 4, effects similar to those described in claim 1 can be obtained.

According to the method of claim 5, in addition to the above-mentioned effects, it is possible to excavate curved grooves with smoothed wall surfaces.

[Brief explanation of drawings]

Figure 1 is a plan view showing one embodiment of the present invention, Figure 2 (A)
, (B) is a side view showing the bucket set state and excavation state, FIG. 3 is a side view showing an example of the earth drill bucket used in the present invention, and FIGS. 4 to 6 are detailed explanations of the present invention, respectively. Plan of the vertical hole, No. 7
The figure is a longitudinal sectional view showing a part of Fig. 6, Fig. 8 is a side view showing a bucket suitable for carrying out the construction method shown in Figs. 6 and 7, and Figs. 9 to 11 are FIG. 12 is a plan view showing another embodiment of the construction method according to the present invention, FIG. 12 is a plan view showing the conventional construction method, and FIG. 13 is a side sectional view thereof. Curved groove applicant Meguro Tsushin Construction Co., Ltd. and one other agent Patent attorney Masami Akimoto and one other person Figure 3: Curved groove 4: Hydraulic excavator 10: Arm 20: Earth drill bucket 24: Obstacle 30: Vertical hole Diagram 2 Fig. 3a Fig. 4 Fig. 5 Fig. 3: Curved groove 30: Vertical hole Fig. 6 Fig. 9 Fig. 10 Fig. 3B9 Curved groove 4: Hydraulic excavator 10: Arm 20: Earth drill hacket 24, Obstacle 30: Vertical hole

Claims (1)

[Claims] 1. An earth drill bucket having a rotary drive device is attached to an arm of a working machine, and the rotary drive device rotates the bucket and at the same time moves the arm downward to drill a vertical hole. A curved groove excavation method characterized by forming a curved groove by assembling a plurality of grooves. 2. The method for excavating a curved groove according to claim 1, characterized in that a curved groove having a width larger than the diameter of the vertical hole is formed by excavating a plurality of vertical holes in the width direction of the groove. 3. Attach an earth drill bucket with a rotary drive device to the arm of the working machine, and simultaneously rotate the bucket with the rotary drive device and simultaneously move the arm downward to drill a vertical hole so that it partially overlaps the vertical hole. A curved groove excavation method characterized in that a curved groove is excavated by repeating the process of excavating a vertical hole by the same operation as described above. 4. Attach an earth drill bucket with a rotary drive device to the arm of the working machine, rotate the bucket by the rotary drive device, and at the same time move the arm downward to drill a vertical hole, and drill a vertical hole a distance shorter than the diameter of the vertical hole. A curved groove is excavated by repeating the process of drilling vertical holes in separate locations or partially overlapping locations using the same actions as above, and between these vertical holes, drilling vertical holes using the same actions as above. A curved trench excavation method characterized by: 5. Attach an earth drill bucket with a rotational drive device to the arm of the working machine, rotate the bucket by the rotational drive device, and at the same time move the arm downward to drill a vertical hole, partially overlap the vertical hole, or A curved groove can be created by repeating the process of drilling vertical holes in separate locations using the same operation as described above, and then moving the earth drill bucket equipped with a side cutter laterally while rotating to drill between these vertical holes. A curved trench excavation method characterized by excavation.