JPH0696853B2 - Ditch rig - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trench excavating device for excavating a deep trench for water shielding in a relatively hard ground.

[0002]

A wall-shaped deep groove is excavated in the ground, and a wall constituent material such as concrete is filled in the groove or a water impermeable membrane material made of a synthetic resin is hung to open the underground wall. Construction is well known in the art, but the creation of the groove in this conventional example is
Most of them are excavating tools that extend vertically into the ground from the excavator body installed on the ground, so the excavation groove length per operation is relatively short, and the groove width is often relatively wide, long. Moreover, it was difficult to create a narrow groove.

By the way, it is known that a string-like tension member having a plurality of earth and sand cutting tools attached thereto is horizontally moved between a pair of suspension frames to form a long and deep groove (Japanese Patent Publication No. S59-59). No. 20820), the excavator according to this known example is rather suitable for excavating relatively soft ground, and is not suitable for excavating relatively hard ground.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a groove excavating apparatus suitable for forming a long groove having a narrow width on a relatively hard ground. It is in.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The first structural feature of the trench excavation device of the present invention is a pair of cylindrical frame members, a guide girder installed between the cylindrical frame members, and a guide girder guided by the guide girder. And a drilling tool that is forcibly reciprocated horizontally in a horizontal direction. The body of the drilling tool is made of a highly rigid plate-like body, and a large number of fixed drilling blades are attached along the lower end edge thereof. The structural feature of the second trench excavation device of the present invention is that a pair of cylindrical frame bodies, a guide girder installed between the cylindrical frame bodies, and a horizontal direction guided by the guide girders. The excavator is forcibly reciprocated, and the main body of the excavator is made of a highly rigid plate-like member, and a downward groove extending in the lengthwise direction is formed in the lower part of the excavator, and both side walls of the groove are formed. A large number of fixed excavating blades are provided along the lower edge, and the fixed excavating blades are provided with cutting edges at appropriate intervals in the length direction of the groove portion. In that a plurality of automatic circular cutter which rotates protrudes from the lower edge are attached.
Further, as a preferred embodiment of the second groove excavating device, a large number of second fixed excavating blades are provided in a portion of the groove portion of the body of the excavating tool excluding the automatic circular cutter attachment portion.
The cutting edge of the fixed excavating blade is located between the cutting edge of the fixed excavating blade on the lower edge of the body of the excavator and the downward projecting cutting edge of the automatic circular cutter. Some are divided and some are provided with automatic circular cutters on the outside of both side walls of the groove.

A basic feature of the groove excavator of the present invention is that the excavator has a large number of fixed excavating blades mounted along the lower edge of a main body made of a highly rigid plate. Is to reciprocate horizontally to excavate the ground like a saw, and according to the groove excavator of the present invention, it is possible to reliably form a long and narrow groove even on a relatively hard ground. And it can excavate efficiently.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 5 which are explanatory views of a first trench excavation device of the present invention, 1 is a cylindrical frame body, 2 is a bridge between a pair of cylindrical frame bodies 1 and 1. The guide girders 3 and 3 represent the excavator guided by the guide girder 2 and forcibly reciprocated in the horizontal direction.

The guide girder 2 is provided with a downwardly directed groove portion 4 into which the upper portion of the main body of the excavator 3 is inserted and which is guided horizontally.
A large number of rollers 5 are attached near the bottom of the groove 4.

The main body of the excavator 3 is a plate-shaped body having high rigidity, and a large number of fixed excavating blades 6 are attached to the lower end edge thereof.

The excavator 3 is moved by an appropriate drive device 7 built in the cylindrical frame bodies 1, 1, but in the case of the figure, the drive device 7 is used.
The excavator 3 is alternately pulled by the wire 9 wound around the drum 8, which is a part of the above, to horizontally reciprocate.

The cylindrical frames 1 and 1 are inserted into two vertical holes separated from each other on the planned groove excavation line, and a downward force is applied by the support rods 10 attached to the respective cylindrical frames 1, The excavator 3 is horizontally reciprocated to sequentially excavate the groove downward. At this time, the force acting on the support rod 10 is adjusted to adjust the ground pressure of the fixed excavating blade 6. The efficiency of trench excavation can be improved.

The vertical hole into which the cylindrical frame 1 is inserted may be excavated up to a predetermined depth in advance, but a swivel excavating blade (not shown) for excavating the vertical hole is attached below the cylindrical frame 1. The vertical hole excavation and the trench excavation may be performed concurrently.

In the treatment of the excavated soil generated during the excavation of the above-mentioned trench, muddy water is ejected near the fixed excavating blade 6 through the pipe line 11 in the main body of the excavating tool 3 to insert the excavated earth and sand into the tubular frame 1. The air-lift type earth-discharging pipe 12 provided in the cylindrical frame 1 is discharged to the ground.

Next, the second aspect of the present invention will be described with reference to FIGS.
The groove excavator will be described, but the description of the portions common to the first groove excavator described above will be omitted.

In FIGS. 6 to 8, 13 is an excavator, which has a downwardly extending groove 14 formed in the lower portion of its main body and extending along the lower edges of both side walls 15, 15. A large number of fixed excavating blades 16 and 16 are provided, and an automatic circular cutter 18 driven by a small motor 17 is mounted in the groove portion 14.

Although only one automatic circular cutter 18 is shown in FIG. 6, a plurality of automatic circular cutters 18 are provided at appropriate intervals in the lengthwise direction of the excavator 13, and these automatic circular cutters 18 have their cutting edges. The fixed excavating blades 16 and 16 project downward and rotate.

Reference numeral 19 is a block attached to the portion of the groove 14 excluding the automatic circular cutter attachment portion,
A large number of second fixed excavating blades 20 are provided on the lower edge thereof, and the cutting edge of the second fixed excavating blade 20 is the fixed excavating blade 1.
It is located in the middle of the blade edge of No. 6 and the downward protruding edge of the automatic circular cutter 18.

When the second fixed excavating blade 20 is not provided, first, the central portion of the groove is excavated by the automatic rotary cutter 18, and then both sides thereof are excavated by the fixed excavating blades 16, 16, so that the groove excavation is performed in two stages. In contrast to what is done, the second fixed drilling blade 20
9, the excavation of the groove 21 is carried out in three steps from the central part to the lateral part in sequence as shown in FIG. 9, so that the excavation of the groove in the solid ground can be performed more effectively.

When the second fixed excavating blade 20 is not provided, it is necessary to make the thickness of the automatic circular cutter 18 close to the width of the groove 14 so that the unexcavated portion does not occur.

In the above-mentioned second trench excavation device, as shown in FIG.
As shown in, the automatic circular cutter 18 of the groove portion 14 may be divided into a plurality (two in the case of the drawing) in the width direction to improve the cutting efficiency on the hard ground.
As shown in FIG. 11, automatic circular cutters 18 'and 18' are also provided on the outer sides of both side walls 15 and 15 of the groove portion 14 to improve cutting efficiency and to finish the groove excavation wall surface more accurately. May be.

[0021]

EFFECTS OF THE INVENTION Since the groove excavating device of the present invention is as described above, it is possible to quickly and reliably excavate a long groove having a narrow width even in a relatively hard ground. And, in particular, in the second groove excavating device, since the automatic circular cutter is provided outside the fixed excavating blade, excavation of a groove having a predetermined width is further facilitated.

[Brief description of drawings]

FIG. 1 is a side view of a first trench excavation device of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG.

FIG. 4 is a partially enlarged view of FIG.

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is a partial side view of the second trench excavation device of the present invention.

7 is a cross-sectional view taken along the line DD of FIG.

8 is a sectional view taken along line EE of FIG.

9 is a cross-sectional view showing an aspect of excavation of a groove by the groove excavating device shown in FIG.

10 is a cross-sectional view corresponding to FIG. 7 when the automatic circular cutter is divided into two in the width direction.

FIG. 11 is a cross-sectional view of the same when an automatic circular cutter is provided on the outside of both side walls of the groove.

[Explanation of symbols]

1: Cylindrical frame, 2: Guide girder, 3: Excavator, 4: Groove,
5: Roller, 6: Fixed excavating blade, 7: Driving device, 8: Drum, 9: Wire, 10: Support rod, 11: Pipe line, 12: Exhaust pipe, 13: Excavator, 14: Groove part, 15: Side wall , 16:
Fixed drilling blade, 17: small motor, 18, 18 ': automatic circular cutter, 19: block, 20: second fixed drilling blade,
21: groove.

Claims (5)

[Claims] 1. A pair of cylindrical frame bodies, a guide girder installed between these cylindrical frame bodies, and an excavator that is guided by the guide girders and forcibly reciprocates horizontally. A groove excavating device, wherein a main body of the excavating tool is made of a highly rigid plate-like body, and a large number of fixed excavating blades are attached along a lower end edge thereof. 2. A pair of cylindrical frame bodies, a guide girder installed between these cylindrical frame bodies, and an excavator that is guided by the guide girders and forcibly reciprocates horizontally. The main body of the excavator is made of a highly rigid plate-like body, and a downward groove extending in the lengthwise direction is formed in the lower part thereof, and a large number of fixed excavating blades are provided along the lower edges of both side walls of the groove. A plurality of automatic circular cutters are attached to the groove portion at appropriate intervals in the lengthwise direction so that the blade edge protrudes below the blade edge of the fixed excavating blade and rotates. 3. A large number of second fixed drilling blades are provided in a portion of a groove portion of a body of the drilling tool excluding an automatic circular cutter attachment portion, and a cutting edge of the second fixed drilling blade is provided at a lower edge of a body of the drilling tool. The groove excavating device according to claim 2, wherein the groove excavating device is located between the blade edge of the fixed excavating blade and the downward projecting blade edge of the automatic circular cutter. 4. The groove excavator according to claim 2, wherein the automatic circular cutter of the groove is divided into a plurality of pieces in the width direction. 5. The groove excavating device according to claim 2, wherein automatic circular cutters are also provided on the outer sides of both side walls of the groove.