JPH0533327A - Ground cutting method and ground cutting device using wire saw - Google Patents

Abstract

(57) [Abstract] [Purpose] A ground cutting method using a wire saw that can prevent vertical tension and horizontal protrusion due to slack in the wire saw and can improve soil removal efficiency, and Provide a ground cutting device. [Composition] End guide holes are provided at both ends of the ground to be cut so as to extend substantially vertically downward, intermediate guide holes are provided between the end guide holes, and then end guide piles are erected in the end guide holes. After installing the intermediate guide piles in the intermediate guide holes, and then installing the pulleys on the upright end guide piles and intermediate guide piles so that the pulleys can move up and down, an endless wire saw is used to connect the pulleys. Then, the pulley is lowered along the guide pile while the wire saw is fed along the length direction by the wire saw driving means, and the ground is cut by the wire saw fed in the length direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground cutting method for cutting the ground by using a wire saw, and a ground cutting device using the wire saw for preferably carrying out the method.

[0002]

2. Description of the Related Art Conventionally, as a ground cutting method using a wire saw, as shown in FIG. 15, both ends of a ground E to be cut are provided with end guide holes 1 so as to extend substantially vertically downward and the ends thereof are cut. The end guide pile 2 is erected in the part guide hole 1, and then the pulley 3 is attached to the erected end guide pile 2.
, The endless wire saw 4 is wound so as to connect the pulleys 3 together, and then the wire saw 4 is guided by the wire saw driving means 5 while the wire saw 4 is fed in the longitudinal direction. A construction method is known in which the ground E is cut by the wire saw 4 which is fed along the length of the pile 2 and is fed in the lengthwise direction.

[0003]

However, the above-mentioned conventional ground cutting method using the wire saw has the following drawbacks.

That is, when the cutting groove M is long in plan view, the slack of the wire saw 4 causes a large vertical swelling, resulting in poor cutting efficiency and horizontal protrusion. The cutting groove M cannot be straightened,
There is a defect that a sheet or the like to be inserted does not enter the cutting groove M due to water stoppage. Further, there is a drawback that the discharging distance of the cut soil becomes long and the discharging efficiency becomes poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent vertical tension and swelling in the horizontal direction due to slack of a wire saw, and to improve soil discharging efficiency. It is an object of the present invention to provide a ground cutting method using a wire saw capable of achieving the above, and a ground cutting apparatus using the wire saw that is preferably used for carrying out the method.

[0006]

According to a first aspect of the present invention for achieving the above object, end guide holes are provided at both ends of the ground to be cut so as to extend substantially vertically downward, and the end guide holes are provided. An intermediate guide hole is provided between them, then an end guide pile is erected in the end guide hole, and an intermediate guide pile is erected in the intermediate guide hole, and then the erected end guide pile and the intermediate guide pile are installed. After the pulley is provided to be movable up and down, an endless wire saw is wound so as to connect the pulleys to each other, and then the wire saw is fed along the lengthwise direction by the wire saw driving means while the pulley is guided into the guide pile. It is characterized in that the ground is cut by the wire saw that is fed along the lengthwise direction by being lowered along.

In order to preferably carry out the above construction method, in the invention according to claim 2, the end guide piles are provided upright in the end guide holes provided at both ends of the ground to be cut and extending substantially vertically downward. In addition, an intermediate guide pile is erected in an intermediate guide hole provided between the end guide holes, and a pulley having a rotary shaft in a horizontal direction is vertically movable in the erected end guide pile and intermediate guide pile. It is characterized in that it is provided with a wire saw driving means for winding an endless wire saw so as to connect the pulleys to each other, and feeding the wire saw along the length direction thereof.

[0008]

[Operation] In addition to the guide piles at both ends of the ground to be cut, an intermediate guide pile is provided between them, and a pulley that descends along the intermediate guide piles is used to remove the wire saw located in the middle portion of the groove to be cut. Since the movement is regulated, it is possible to prevent vertical tension or swelling in the horizontal direction, which tends to occur due to loosening of the intermediate portion of the wire saw, and to cut the cutting groove straight and efficiently.

Further, in addition to the end guide holes at both ends, the intermediate guide holes existing between them can also be used for soil discharge, so that the soil discharge distance can be shortened and the soil discharge efficiency can be improved. Further, after the ground cutting, when inserting a waterproof material such as a sheet into the cutting groove, in addition to the guide piles at the end portions, intermediate guide piles existing between them can be used, so that the workability of inserting the sheet can be improved. Is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state where the ground E is cut by the ground cutting device according to the present invention. Reference numeral 1 in the figure
Numerals 0 and 10 are end guide holes provided at both ends of the ground E to be cut and extended substantially vertically downward, and 11, 11 are provided at equal intervals between the end guide holes 10 and substantially vertical. It is an intermediate guide hole that extends downward.

An end guide pile 14 and an intermediate guide pile 15 are provided upright in the end guide hole 10 and the intermediate guide hole 11, respectively. Pulleys 16 are provided on the end guide piles 14 and the intermediate guide piles 15 which are erected so as to be able to move up and down, and the pulleys 16 and the pulleys 17 and 1 arranged above the end guide holes 10 and 10.
An endless wire saw 18 is wound so as to connect the seven. Then, the wire saw 18 is fed along the length direction by the wire saw driving means 19 arranged on the ground E.

Next, each component of the ground cutting device will be described in detail. As shown in FIGS. 1, 5 and 9, the end guide hole 10 has an H-shaped bottom whose root is solidified with a mortar 20. The end guide pile 14 made of steel is erected, and the pulley 1 is housed in the end guide pile 14 via a pulley box 21.
6 is provided to be able to move up and down.

Flat plates 22 are attached to the upper and lower portions of both sides of the pulley box 21 so as to project laterally, and a flat plate 24 is attached to the rear face via connecting plates 23.
Are attached so as to be parallel to the flat plates 22 ... When this pulley box 21 is fitted into one of the grooves 14a of the H-shaped steel forming the end guide pile 14, the flat plate 22 on the front surface is welded to the side portion of the end guide pile 14 to form the angle steel 25. And the flat plate 24 on the back surface
Is the web 14b and the flange 14 of the end guide pile 14.
By engaging with c, it is prevented from coming off from the groove 14a while maintaining a predetermined posture. A shaft 27 extends horizontally and is mounted between the left and right side portions of the pulley box 21, and the pulley 1 is attached to the shaft 27.
6 is rotatably supported.

One end of a wire 31 is attached to the top plate 29 of the pulley box 21 via a shackle 30, and the other end of the wire 31 is arranged above the end guide pile 14 as shown in FIG. It is wound around a winch 32. Further, one end of a wire 35 is attached to the bottom plate 33 of the pulley box 21 via a shackle similarly to the top plate, and the other end of the wire 35 is a shaft welded to the lower end of the end guide pile 14. After being wound around a pulley 37 supported by 36, it passes through the groove 14d on the other side of the end guide pile 14 and exits upward to be wound around the winch 32. That is, when the winch 32 is driven, the wires 31 and 35 are pulled and relaxed,
The pulley box 21 can be adjusted up and down along the end guide pile 14.

Further, the ascending / descending distance of the pulley box 21 can be measured based on the signal emitted from the encoder 38 mounted on the wire 31 or 35. The depth of the pulley box 21 detected by the encoder 38 is input to a microcomputer (not shown) to adjust the vertical movement of the pulley box 21, and a design depth obtained from this depth and a preset cutting speed input to the microcomputer in advance. Is compared with each other, and a predetermined signal is issued from the microcomputer according to the comparison value to automatically drive the winch 32.

The pulley 16 mounted on the end guide pile 14 so as to be able to move up and down is composed of a ring 40 fitted on the shaft 27 and an outer pulley body 41, as shown in FIGS. Many ball bearings in between 4
2, the hard rubber layer 42 for cushioning the wire saw 18 and the pulley body 41 is provided on the surface of the groove 41a on the outer periphery of the pulley body 41.

On the other hand, as shown in FIGS. 2 and 10, an intermediate guide pile 15 is also provided upright in the intermediate guide hole 11 in a state where the bottom portion is solidified by the mortar 20. In the intermediate guide pile 15, two grooved steels 43, 43 are provided in the groove portions 4 of each other.
3a and 43a are arranged so as to face each other, and a gap for inserting the wire saw 18 therebetween is provided therebetween. The two channel steels 43, 43 are held at a predetermined distance by bolting the upper and lower flanges to each other via a connecting plate 44 as shown in FIG. 4B. Further, the pulley 16 is provided in a groove portion formed in the center of the intermediate guide pile 15 so as to be able to move up and down via a pulley box 45.

Flat plates 47, 47 are mounted on both sides of the pulley box 45 in parallel with each other with a pair of connecting plates 46, ... And this pulley box 45 is the intermediate guide pile 15
When fitted into the central groove portion 43 of the flat plate 47, the outer surface of the flat plate 47 is engaged with the inner surface of the web 43b of the grooved steel that constitutes the intermediate guide pile 15, and the left and right ends of the flat plate 47 are made of the grooved steel. By engaging with the inner surface of the flange 43c, a predetermined posture is maintained and it does not come out of the groove.

A shaft (not shown) extends horizontally and is mounted between the left and right sides of the pulley box 45, and the pulley 16 is rotatably supported on the shaft 24. The structure of the pulley 16 is the end guide pile 14 described above.
The same as those provided in.

One end of a wire 54 is attached to the top plate 52 of the pulley box 45 via a shackle 53, and the other end of the wire 54 is wound around a winch arranged above the intermediate guide pile 15. (Not shown).
Further, one end of a wire 60 is attached to the bottom plate of the pulley box 45 via a shackle (both not shown), and the other end of the wire 60 has an intermediate guide pile 15
After being wound around a pulley 62 attached to the lower end of the intermediate guide pile 15, it passes through the groove portion of the intermediate guide pile 15 and exits upward to be wound around a winch.

The pulley 62 is the intermediate guide pile 15
A shaft 64 extends horizontally in a horizontal direction at the lower end of the connecting plate 63 passed over the left and right channel steels constituting the above and is fixed by welding, and is rotatably attached to the shaft 64. A notch 65 is provided in the center of the connecting plate 63 to avoid interference with the pulley 62.

Then, the pulley box 45 drives the winch provided above the intermediate guide pile based on a signal sent from the computer, similarly to the pulley box 21, whereby the wires 54, 60 are driven.
Is operated by pulling and loosening, and is adjusted up and down. Further, the ascending / descending distance of the pulley box 45 is measured based on a signal emitted from an encoder mounted on the wire 54 or 60. The pulley 62, which is attached to the intermediate guide pile 15 so as to be able to move up and down, has a structure as shown in FIGS. 11 and 12, like the pulley.

When the pulley 16 descends along the end guide piles 14 or the intermediate guide piles 15, the required length of the wire saw 18 is changed. A wire saw adjusting means for adjusting the length of the wire saw is attached to the (not shown).

Next, a ground cutting method using the ground cutting device will be described.

First, as shown in FIG. 3, the ground E to be cut is used.
The end guide holes 10 are formed so as to extend substantially vertically downward at both ends of the
Is excavated, and the intermediate guide hole 11 is excavated between the end guide holes 10.

Then, as shown in FIGS. 4 (a) and 4 (b), the end guide pile 1 is lifted by a lifting means such as a crane.
4 and the intermediate guide pile 15 are lifted, and the guide piles 14 and 15 are inserted into the end guide hole 10 and the intermediate guide hole 11, respectively. At this time, the intermediate guide pile 15
The upper and lower end portions of the channel steel 43 constituting the intermediate guide pile 15 are connected to each other with a connecting plate 44 at an appropriate distance. This is to prevent rattling of the channel steels 43, 43 during insertion and after installation.

After installation, as shown in FIG. 5, a pipe 70 for mortar injection is inserted into the end guide hole 10 and the intermediate guide hole 11. Then, mortar is injected from the tip of the pipe to replace muddy water at the bottom of the guide holes with mortar, and the lower ends of the end guide piles and the intermediate guide piles are firmly fixed to the bottoms of the guide holes.

Then, the pulley boxes 21, 4 are respectively attached to the end guide piles 14 and the intermediate guide piles 15 which are erected.
Insert 5.

Specifically, as shown in FIG. 9, the pulley 1
The pulley box 21 incorporating 6 is inserted into one groove of the H-section steel by engaging the flat plate 21 with the angle steel 25 and the flat plate 24 with the web of the H-section steel forming the end guide. To do. On the other hand, similarly for the intermediate guide pile 15, the pulley box 45 in which the pulley 16 is incorporated is similarly used for the double channel steel 4 which constitutes the intermediate guide pile 15.
It is inserted in the groove portion formed between 3, 43. At this time, the upper connecting plate 44 connecting the two channel steels 43, 43 shown in FIG. 5 is temporarily removed by using bolts.

Then, as shown in FIG. 6, the pulley 1 is provided above the end guide piles 14 and the intermediate guide piles 15.
Install 7 and winch 32. The pulleys and the like are attached by using a tripod mount 72 assembled near the guide holes 10 and 11, as shown in the figure.

Next, the pulley 1 provided as described above
An endless wire saw 18 is wound so as to connect 7, the winch 32, and the wire driving means 19 arranged near the guide hole.

Next, as shown in FIGS. 8 and 9, the upper ends of the end guide piles 14 and the intermediate guide piles 15 are connected by bolts with H-shaped steel 73 horizontally lying down. As a result, it is possible to prevent the guide piles 14 and 15 from rattling or shifting. In addition, the guide piles 14 and 15
When it is predicted that the length will be large and the backlash and displacement will be large, the H-section steel 73 may be installed on both sides of the guide piles 14 and 15.

Next, the pulley 16 is lowered along the guide piles 14 and 15 while the wire saw 18 is driven along the lengthwise direction by the wire saw driving means 19 so that the pulley 16 is lowered together with the pulley 16. The ground E is cut by the wire saw 18.

The feeding speed of the wire saw 18 by the wire saw driving means 19 varies depending on the diameter of the wire saw 18 or the soil material forming the ground E, but is within a range that does not hinder the durability of the wire saw 18. Set to an appropriate value within. If the feed speed of the wire saw 18 is determined, the pulley boxes 21, 45
The descent rate of is also determined.

The pulley 16 is lowered by driving the winch 32 connected to the wires 35 and 60 extending from the pulley boxes 21 and 45 supporting the pulley 16. Specifically, by pulling the wires 35 and 60 extending from the bottom plate of the pulley box by the winch 32, the pulley 16 is lowered together with the pulley boxes 21 and 45.

The descending speed of the pulley 16 is entered in the computer in advance, and the pulley 16 is descended accordingly. Specifically, the wires 31, 35, 54,
The depth of the pulley 16 calculated from the encoder 38 attached to 60 is determined, and it is judged whether or not this value is the same as a preset value. If different, the pulley 1
Adjust the feed rate of 6. As a result, the descending speed of the pulley 16 is automatically adjusted. The load applied to the winch 32 for lowering the pulley 16 or the wire 3 for lowering the pulley boxes 21, 45.
The tensions applied to 5, 60 may be measured, and when they exceed a predetermined range, control may be performed such that the descending speed of the pulley 16 is slowed or stopped.

As described above, not only the pulleys 16 located at both ends of the ground E to be cut, but also the pulleys 16 located in the middle are lowered along the intermediate guide piles 15 and are lowered along the intermediate guide piles 15. Since the movement of the wire saw 18 can be regulated by the pulley 16 that operates, the vertical tension and horizontal protrusions caused by the slack of the wire saw 18 that occurs when cutting with the guide piles 15 at both ends only. Can be prevented.

In addition to the both end guide holes 10 and 10, the intermediate guide holes 11 and 11 existing between them can be used for earth unloading, so that the earth unloading distance can be shortened and the earth unloading efficiency can be improved.

After cutting, if necessary, the cutting groove M
Insert the waterproof sheet S etc. For inserting the waterproof sheet S, the one shown in FIGS. 13 and 14 is used.

That is, reference numeral 80 is a pin box which is fitted in the groove of the end guide pile 14 or the intermediate guide pile 15 so as to be able to move up and down. (Not shown) is provided to prevent rattling when the guide piles 14 and 15 are moved up and down.

Further, one end of a wire 83 is attached to the top plate 81 of the pin box 80 via a shackle 82, and the other end of the wire 83 is wound around the winch 32 shown in FIG. Also, the pulley box 8
No. 0 bottom plate 35, wire 86 through shackle 85
Is attached to one end of the wire 86, and the other end of the wire 86 is wound around a pulley 88 supported by a shaft 87 welded to the lower end of the end guide pile 14 or the intermediate guide pile 15, , 15 and is wound around the winch 32.

A U-shaped connecting plate 90 is attached to the upper front plate of the pin box 80, and a pin 91 is loosely secured to the connecting plate 90 at its lower end by a wire 92. A locking means 9 such as a wire is attached to the pin 91 locked to the connecting plate 90.
The lower end of the seat S is locked by 4. Sheet S
A reinforcing ring 95 is attached to a portion locked by the locking means 94 so that the tension from the locking means 94 is not directly applied to the sheet S.

Further, one end of a wire 95 is connected to the head of the pin 91, and the other end of the wire 95 is a guide when the pin box 80 is lowered along the guide piles 14 and 15. It is left behind at the top of the hole.

When the sheet S is inserted by the above-mentioned device, the pin box 80 having the lower end of the sheet S locked is moved to the winch 3
By driving the wire 2, the wire is lowered along the guide piles 14 and 15 via the wire 86. Thus, as the pin box 80 descends, the lower end of the sheet S is pulled down and inserted into the cutting groove of the ground E. Then, when the sheet S reaches the lower end, the wire 95 is strongly pulled upward, and the lock 92 at the lower end of the pin 91 is released to pull it upward. Then, the winch 32 is driven to drive the wire 8
Only the pin box 80 is pulled up via 3.
By the above operation, the sheet S can be inserted into the cutting groove of the ground E.

The shapes and dimensions of the constituent members shown in the above embodiment are merely examples, and can be variously changed according to design requirements.

For example, although two intermediate guide holes 11 are provided in the figure, an appropriate number may be provided depending on the length of the groove to be cut. However, if the length is too long, the cutting resistance applied to the wire saw 18 becomes large, and therefore, it is limited to a range that does not hinder the wire saw 18 and the wire saw driving means 19.

Further, in this embodiment, the dedicated pin box 80 for inserting the sheet is used, but the pin box function may be provided to the pulley boxes 21 and 45. That is, when the connection plate 90 shown in FIG. 14 is attached to the pulley boxes 21 and 45 and the sheet S is inserted, the insertion work may be performed using the connection plate 90 attached to the pulley boxes 21 and 45.

The means for lowering the pulley 16 is not limited to the one using the wires 35, 60, etc., but a chain or the like may be used.

[0049]

As described above, according to the present invention, in addition to the guide piles at both ends of the ground to be cut, intermediate guide piles are provided between them, and the pulleys descending along the intermediate guide piles are used. Since the movement of the wire saw can be regulated, it is possible to prevent vertical tension and horizontal protrusions due to the looseness of the wire saw existing between the guide piles on both ends, making the groove straight and efficient. Can be cut well.

Further, in addition to the guide holes at both ends, the intermediate guide holes existing between them can be used for soil discharge, so that the soil discharge distance can be shortened and the soil discharge efficiency can be improved.

Furthermore, since the intermediate guide hole and the intermediate guide pile erected there can be used when the sheet is inserted into the cutting place after the ground cutting, and the groove is cut straight, The work of inserting the sheet becomes easy, and the efficiency can be further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a state in which ground is cut by the method of the present invention.

FIG. 2 is a plan view illustrating a state in which ground is cut by the method of the present invention.

FIG. 3 is a cross-sectional view showing the procedure of the method of the present invention.

FIG. 4 is a perspective view illustrating a built-in state of an end guide pile and an intermediate guide pile.

FIG. 5 is a cross-sectional view illustrating a state of injecting mortar for consolidation of a guide pile.

FIG. 6 is a perspective view for explaining the arrangement of devices existing in the upper part of the end guide pile and in the vicinity thereof.

FIG. 7 is a perspective view illustrating prevention of displacement of the upper portion of the end guide pile during groove cutting.

FIG. 8 is a perspective view illustrating prevention of displacement of the upper portion of the intermediate guide pile during groove cutting.

FIG. 9 is a perspective view showing the details of an end guide pile and a pulley box inserted therein.

FIG. 10 is a perspective view showing details of an intermediate guide pile and a pulley box inserted therein.

FIG. 11 is a side view of the pulley.

FIG. 12 is a sectional view of a pulley.

FIG. 13 is a cross-sectional view illustrating a construction method when inserting a sheet into a cutting groove of the ground.

FIG. 14 is a perspective view showing details of a main part when a seat is inserted.

FIG. 15 is a cross-sectional view illustrating a ground cutting method using a conventional wire saw.

[Explanation of symbols]

10 End guide hole 11 Intermediate guide hole 14 End guide pile 15 Intermediate guide pile 16 pulley 17 pulley 18 wire saw 19 Wire saw driving means 21 pulley box 31 wire 35 wire 38 encoder 45 pulley box 54 wire 60 wires E ground

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Juichi Ise             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation

Claims (2)

[Claims] 1. An end guide hole is provided at both ends of the ground to be cut so as to extend substantially vertically downward, an intermediate guide hole is provided between the end guide holes, and then an end guide pile is provided in the end guide hole. And the intermediate guide piles are erected in the intermediate guide holes, and then the end guide piles and the intermediate guide piles that have been erected are provided with pulleys that can be moved up and down, and endlessly connected to connect the pulleys. By winding the wire saw of, then while feeding the wire saw along the length direction by the wire saw driving means, by lowering the pulley along the guide pile,
A ground cutting method using a wire saw, wherein the ground is cut by the wire saw fed in the length direction. 2. An end guide pile is erected in an end guide hole extending substantially vertically downward at both ends of the ground to be cut, and an intermediate guide hole provided between the end guide holes. An intermediate guide pile is erected, and a pulley having a horizontal rotation axis is provided on the vertically erected end guide pile and intermediate guide pile so as to be able to move up and down, and an endless wire saw is wound so as to connect the pulleys. A ground cutting device using the wire saw, further comprising wire saw driving means for feeding the wire saw along the length direction thereof.