JP2828919B2 - Horizontal plate shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal slab shield machine, and more particularly, to an excavation part for laying a road or a railroad or the like which is horizontally excavated to construct a horizontal slab structure. Horizontal shield machine.

[0002]

2. Description of the Related Art An excavator is started horizontally in the ground, and excavates earth and sand to a horizontal side perpendicular to the direction of propulsion of the excavator. In addition, the technology of loading materials such as girders from the side of the excavator and building a horizontal plate-like structure was developed by the applicants of the present invention,
It has already been proposed (for example, Japanese open flat No. 8-53988
Gazette ).

[0003]

In the case where the construction site where the horizontal shaft is excavated to construct the horizontal plate-like structure is an embankment portion for laying a road or a railway, there is no groundwater. The excavation site is also self-sustaining.

However, the above-mentioned embankment has a shallow earth covering,
When the excavator has been suspended for a long time in the ground, when there is a large amount of rainfall, or when the surface of the ground collapses due to the impact of vibration caused by trains and vehicles passing over the embankment, the ground surface collapses Can be considered.

The present invention has been made in view of the above circumstances, and has as its object the case where an excavator has been stopped for a long time in the ground, the amount of rainfall is large, or It is an object of the present invention to provide a horizontal slab shield capable of holding a face and preventing collapse even when a vibration or the like occurs as a train or vehicle passes.

Another object of the present invention is to prevent collapse of the embankment on both sides in the horizontal direction perpendicular to the direction of excavation of the excavator, and to enable excavation with the excavation earth and sand filled in the front of the excavator body. To provide a simple horizontal plate-shaped shield machine.

[0007]

According to the present invention, a face protection plate 11 is provided at the front end of an excavator 1 so as to be pivotable about the center O of a drilling tool. The plate 11 is connected to a face protection plate turning drive unit attached to the excavator body 2.

Further, in order to achieve the above object, the present invention is such that earth retaining plates are attached to both sides of the excavator body 2 in a horizontal direction y perpendicular to the propulsion direction x of the excavator 1. In order to achieve the above object, the present invention
Means that the face protection plate 11 moves around the excavation tool.
It is formed in a substantially semicircular shape surrounding it. Also before
In order to achieve the above object, the present invention provides the above-mentioned claim 3.
A reinforcing plate in which the face protection plate 11 is attached in a string shape
It is reinforced by.

[0009]

According to the present invention, when the excavator 1 is stopped for a long time in the ground, when there is a large amount of rainfall, or when a train or a vehicle passes over the embankment, there is a possibility that the face will collapse and the ground surface will collapse. In some cases, the face protection plate rotation drive unit rotates the face protection plate 11 about the center O of the drilling tool as a center of rotation, and adjusts the face side opening portion of the drilling tool to a minimum.

Accordingly, when the excavator 1 is stopped for a long time in the ground or when the amount of rainfall is large, loosening of the face can be prevented, and the face can be completely held. When an impact is generated due to vibration or the like accompanying the passage of the face, the face can be protected, so that the face can be prevented from collapsing.

In the present invention, the embankment 25 is used by the excavator 1.
When excavating inside the tunnel and excavating the horizontal shaft 31, both sides of the embankment 25 are guarded by earth retaining plates attached to both sides of the excavator body 2 in the horizontal direction y orthogonal to the propulsion direction x. Further, a chamber 40 surrounded by a face protection plate 11 and earth retaining plates extending on both sides of the face protection plate 11 is formed at a front portion of the excavator main body 2, and the chamber 40 is filled with excavated earth and sand. It is possible to excavate.

This makes it possible to more reliably prevent the collapse of the embankment 25 on both sides and the collapse of the face during excavation of the horizontal shaft 31.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 show a first embodiment of the present invention. FIG. 1 is a plan view of an excavator, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a sectional view taken along line C-B of FIG.
FIG. 5 is a sectional view taken along line DD of FIG. 1, FIG. 6 is a sectional view taken along line EE of FIG. 1, and FIG. 7 is a state in which the face protection plate is swung about the center of the drilling tool as a rotation center. It is a vertical side view.

In the first embodiment shown in these figures, an excavator 1 includes a flat and box-shaped excavator main body 2. A bulkhead 3 and an excavator 4
a, 4b, body-side outer cylinders 9, 9 and face protection plate 1
1, a discharge port 18, 18, and a manhole 19 are provided. In addition, earth retaining plates 20, 20 are attached from the front end to the rear end of the excavator body 2. A plurality of propulsion jacks 21 are provided in the front half of the excavator main body 2, and an in-machine inspection port 22 is provided substantially in the middle of the excavator main body 2.
Further, a material insertion portion 23 such as a girder material is formed on the rear half side inside the excavator body 2. A backfill material injecting means (not shown) is attached from the inside of the excavator body 2 to the outside rear side, and a tail seal 24 is provided at the rear end of the excavator body 2. ing.

The partition 3 is formed in a concave arc shape in the direction of excavation of the excavator 1 indicated by an arrow x in FIGS. 1 and 2 and is fixed to the front end of the excavator main body 2.

As shown in FIGS. 2, 4 and 5, two excavating tools 4a and 4b are arranged in parallel. The excavating tools 4a and 4b include shafts 5a and 5b and screws 6a and 6b. The shafts 5a and 5b are, as shown in FIGS.
It is supported rotatably. Further, the shaft 5
a, 5b are connected to the excavator driving motors 10a, 10b. Then, the excavator driving motors 10a, 10b
Are the excavator side inner cylinder 13, fitted to the main body side outer cylinder 9, 9,
13 and is driven synchronously with the drilling tools 4a,
4b can be synchronously rotated in the directions indicated by arrows a and b in FIG. A number of bits 7 are provided on the outer circumference of the screws 6a and 6b.

The outer cylinders 9 on the main body side are fixed to both sides of the excavator main body 2 in a horizontal direction y perpendicular to the excavation direction x.

As shown in FIGS. 2 and 7, the face protection plate 11 is formed in a substantially semicircular shape surrounding the excavating tools 4a and 4b, and is reinforced by a reinforcing plate 12 attached in a chord shape. ing. In addition, face protection plate 1
Numeral 1 is provided so as to be able to turn together with the excavators 4a and 4b around the center O of the excavators 4a and 4b as a center of rotation. Further, both ends of the face protection plate 11 in the horizontal direction y orthogonal to the excavation direction x are integrally connected to the excavator side inner cylinders 13 fitted to the main body outer cylinders 9.
The face protection plate 11 is provided between the outer cylinders 9, 9 on the main body side and the inner cylinders 13, 13 on the digging tool side.
It is connected to the face protection plate turning drive units 14, 14.

The excavator / face protection plate turning drive units 14 and 14 include motors 15 and 15 attached to the outer cylinders 9 and 9 and pinions 16 and 16 connected thereto.
And gears 17, 17 attached to the excavation-side inner cylinders 13, 13 and meshed with the pinions 16, 16. The excavator / face protection plate turning drive units 14 and 14 are synchronously driven in the same direction, and the excavators 4a and 4b and the face protection plate 11 are rotated together with the center O of the excavators 4a and 4b as the rotation center. Is to be turned.

The discharge ports 18, 18 are shown in FIGS.
As shown in the figure, the excavated soil is formed at the lower part on the back side of the outer cylinders 9 on the main body side, and is provided to discharge both sides of the excavated earth and sand in the horizontal direction y orthogonal to the propulsion direction x.

As shown in FIG. 2, the manhole 19 is formed so as to be able to pass through the bulkhead 3 from the inside of the excavator body 2 and enter a space surrounded by the face protection plate 11 and its reinforcing plate 12.

The retaining plates 20, 20 are shown in FIGS.
As can be seen from FIG. 6, the excavator body 2 is vertically fixed on both sides in the horizontal direction y perpendicular to the propulsion direction x, and prevents collapse of the embankment 25 during excavation in the horizontal shaft. Further, the retaining plates 20, 20 extend to the front of the excavator main body 2, and at the front of the excavator main body 2,
A chamber 40 is formed which is surrounded by the extended portions of the earth retaining plates 20 and 20 and the face protection plate 11, so that the chamber 40 can be filled with excavated earth and sand (not shown). I have.

A plurality of the propulsion jacks 21 are provided in the upper and lower portions of the inside of the excavator main body 2, for example, two by two. The propulsion jacks 21 take a reaction force on the girder member 27 inserted closest to the propulsion jack. , The entire excavator 1 is propelled.

As can be seen from FIG. 3, the in-machine inspection port 22 is formed so that an operator can enter the excavator main body 2 and inspect it from a direction orthogonal to the propulsion direction x in the excavator main body 2. I have.

As shown in FIG. 3, the material insertion portion 23 is formed so that a material such as a girder material can be inserted from a horizontal direction orthogonal to the propulsion direction x in the rear half of the excavator body 2. .

The backfill injection means guides the backfill injection material from the front half of the excavator body 2 to a rear portion outside the excavator body 2, and inserts the backfill injection material into the horizontal shaft 31. It is provided so that it can be injected into the gap between the arranged beam members 27.

As can be seen from FIGS. 1 to 3, the tail seal 24 is provided at the rear end of the excavator main body 2 so as to prevent penetration of the backfill injection material into the excavator main body 2. It has become.

Next, FIG. 8 is a plan view showing a process of excavating the horizontal shaft by the excavator according to the first embodiment and constructing a horizontal plate-like structure, and FIG. 9 is FF of FIG. FIG. 10 is a sectional view taken along line GG of FIG.

8 to 10 and FIG.
FIG. 7 to FIG. 7 illustrate a construction example of excavating a horizontal shaft using the excavator 1 according to the first embodiment of the present invention to construct a horizontal plate-shaped structure.

First, an embankment to be processed in this construction example is an embankment 25 as shown in FIG. 9, and on this embankment 25, as shown in FIGS.
26 are laid.

Therefore, as shown in FIG. 8, the train passing load on the tracks 26, 26 is received by the girders 27 which are long in the horizontal direction y orthogonal to the propulsion direction x of the excavator 1. Then, in order to secure a work space for inserting the girder material 27, as shown in FIGS. 8 and 9, steel sheet piles 28, 28 are cast on the slope portion of the embankment 25, and the outside of the steel sheet piles 28, 28 is formed. Remove the embankment.

Then, the conventional construction method under the tracks 26, 26,
For example, excavation is performed using a pipe loop or the like to form a starting pit of the excavator 1. Further, as shown in FIG.
Pillow posts 29, 29 are buried on the outside of
Guide rails 30, 30 are laid on 9, 29.

Next, the excavator 1 is inserted into the starting pit, and the excavator 1 is set on the guide rails 30, 30. Subsequently, the girder material 27 is inserted into the material insertion portion 23 formed on the rear half of the excavator body 2 from the side of the excavator body 2.

The steel sheet piles 28, 28 are cut off at the lower part of the excavator 1 by the excavating length and removed.

Then, the excavator driving motors 10a and 10b in the excavator 1 are driven to rotate the excavators 4a and 4b to excavate the embankment 25, and the excavated earth and sand are discharged into the discharge ports 18 and
The steel sheet piles 28, 28 are discharged from the excavator 18 to both sides of the excavator body 2 and simultaneously excavated in the horizontal shaft 31, and are removed after cutting. At this time, collapse on both sides of the embankment 25 is prevented by the retaining plates 20, 20 attached to the excavator body 2. Moreover, the excavation is performed while the excavated earth is filled in the chamber 40 surrounded by the portion of the earth retaining plates 20, 20 extending forward of the excavator body 2 and the face protection plate 11, thereby preventing collapse of the face. I do.

As described above, after a predetermined amount of embankment 25 has been excavated and the steel sheet piles 28, 28 have been cut and removed, the propulsion jacks 21 of the excavator 1 are simultaneously extended, and the girder 27 is pushed backward. The excavator 1 is propelled by taking a reaction force to these girder members 27. At this time, the girder material 2 extruded
Since a gap is formed between the guide rails 7 and the guide rails 30, a plate or the like is inserted into the gap to stabilize the gap. In the gap between the excavated shaft 31 and the girder material 27, the excavator body 2
The backfill material is injected by the backfill material injecting means attached to the device to fill the gap. The tail seal 24 prevents the backfill material from entering the excavator body 2. Further, as shown in FIG. 8, an earth retaining material 32 such as a sandbag is provided on the upper part of the girder material 27 to prevent the collapse of the embankment 25.
After the excavator 1 is propelled, the propulsion jack 21 is reduced.

As described above, cutting of the steel sheet piles 28, 28,
By repeatedly removing, inserting the girder material 27, and excavating work in the embankment 25, the tracks 26, 26 in the embankment 25 are formed.
The horizontal shaft 31 is excavated below the slab, and the horizontal plate-shaped structure 33 made of the girder members 27 can be safely and efficiently constructed.

Further, even when the embankment 25 is used as a road, the horizontal plate-like structure 33 can be built by the same operation as described above.

For example, when the excavator 1 is stopped for a long time in the embankment 25, when there is a large amount of rainfall, or when the vibration is severe due to the passage of a train or a vehicle, the face is collapsed and the ground surface is depressed. If there is a possibility that the face protection plate 11 will be operated, the face protection plate 11 is controlled as follows.

That is, the motors 15, 15 of the excavator and face protection plate turning drive units 14, 14 shown in FIG. 1 are synchronously driven in the same direction, and the excavator is driven via the pinions 16, 16 and the gears 17, 17. The side inner cylinders 13 and 13 are rotated. Thereby, the face protection plate 11 and the digging tool 4a,
4b pivots from the position shown in FIG. 2 around the center O of the excavating tools 4a and 4b as shown in FIG.

Therefore, when there is a possibility that the ground surface of the embankment 25 will be depressed, the excavation tools 4a and 4b are adjusted to a minimum at the face side and the excavator 1 is stopped for a long time in the embankment 25. When the amount of rainfall is large, the face can be prevented from being loosened, the face can be completely held, and the face can be protected from shocks such as vibrations caused by passing of trains and vehicles.

8 to 10, reference numerals 34, 34 denote boundaries.

Next, FIG. 11 shows a second embodiment of the present invention, and is a central longitudinal sectional view taken along the propulsion direction of the excavator.

In the second embodiment, the arc of the partition 35 attached to the front end of the excavator body 2 is formed deeper than a semicircle, and two excavators 4a, 4b is stored. This makes it possible to suppress the collapse of the face during excavation.

Further, earth retaining plates 36 attached to both sides of the excavator main body 2 in the horizontal direction y orthogonal to the propulsion direction x extend to the front and lower sides of the excavator main body 2 and are formed in a vast shape. Have been. Thereby, the earth retaining effect of the embankment 25 can be further enhanced as compared with the earth retaining plate 20 of the first embodiment.

Other configurations and operations of the second embodiment are the same as those of the first embodiment.

FIG. 12 shows a third embodiment of the present invention, and is a longitudinal sectional view taken along a center line of the excavator cut along a propulsion direction.

In the third embodiment, one excavator 37 having a large diameter is provided.

The other structure of the third embodiment is the same as that of the second embodiment, and the operation is the same.

In addition to the second and third embodiments, the excavator in the present invention is not limited to the one having the shaft shown in the first embodiment and the screw provided with the bit. May be provided.

The excavating tool may be mounted so as to be movable in the horizontal direction as needed, and when the bit is bitten by a gravel or a block, the excavating tool may be moved to excavate the gravel or the block. In the embodiment for moving the digging tool, the means for moving the digging tool is, for example, a double casing for the digging tool drive unit, and is moved by a hydraulic jack or the like.

Further, as another embodiment of the digging tool / face protection plate turning drive unit, the digging tool side inner cylinder 13 is gripped by a hydraulic chuck and rotated by a jack fixed to the excavator body 2 side. Is also good. Further, a sprocket wheel is provided on the excavating tool side inner cylinder 13, a chain is hung on the sprocket wheel, each end of the chain is individually connected to a jack, and the chain is pulled by the jack. The side inner cylinder 13 may be rotated.

[0054]

As described above, according to the first aspect of the present invention,
In the described invention, a face protection plate 11 is installed at the front end of the excavator 1 so that the face protection plate 11 can be turned around the center O of the excavator, and the face protection plate 11 is attached to the excavator body 2 and turned. Connected to the drive,
If the face collapses and the ground surface may collapse,
Face protection plate 1
When the excavator 1 is turned around the center O of the excavator as a center of rotation, the face side open portion of the excavator is adjusted to a minimum, and the excavator 1 is stopped for a long time in the embankment 25, or when the rainfall is large,
The face can be prevented from being loosened, the face can be completely held, and the face can be protected from shocks such as vibrations caused by the passage of trains and vehicles, and the face can be prevented from collapsing.

Further, in the invention according to claim 2 of the present invention,
Since the retaining plate is attached to both sides of the excavator body 2 in the horizontal direction y perpendicular to the propulsion direction x of the excavator 1, the excavator in the embankment 25 when excavating the horizontal shaft 31 in the embankment 25. 1 has an effect of guarding both sides in the horizontal direction y perpendicular to the propulsion direction x, and has the effect of reliably preventing the collapse of the embankment 25 on both sides. A chamber 4 surrounded by a portion extending forward of 2 and a retaining plate 11.
Since the digging can be performed while the excavated earth and sand are filled in the area 0, there is an effect that the collapse of the face can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of an excavator, showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a view taken in the direction of arrows CC in FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is a view as seen from the direction of arrows EE in FIG. 1;

FIG. 7 is a longitudinal sectional side view showing a state in which the face protection plate is turned around the center of the drilling tool as a rotation center.

FIG. 8 is a plan view showing a process of excavating a horizontal shaft by the excavator of the first embodiment and constructing a horizontal plate-like structure.

FIG. 9 is a sectional view taken along line FF of FIG. 8;

FIG. 10 is a sectional view taken along line GG of FIG. 8;

FIG. 11 shows a second embodiment of the present invention, and is a central longitudinal sectional view of the excavator cut along the propulsion direction.

FIG. 12 shows a third embodiment of the present invention, and is a central longitudinal sectional view in which an excavator is cut along a propulsion direction.

[Explanation of symbols]

 Reference Signs List 1 excavator x direction of excavator propulsion y horizontal direction perpendicular to propulsion direction 2 excavator main body 3 partition 4a, 4b excavator O center of excavator 9 body side outer cylinder 10a, 10b excavator drive motor 11 face protection plate 13 Excavating tool side inner cylinder 14 Excavating tool / face protection plate turning drive unit 18 Discharge port 20 Earth retaining plate 21 Propulsion jack 23 Material insertion unit 24 Tail seal 25 Embankment 26 Track 27 Beam member 31 Horizontal shaft 33 Horizontal plate-shaped structure 35 Partition wall 36 Earth retaining plate 37 Drilling tool 40 Chamber formed at the front of the excavator body

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masami Inoue 1-424 Shinkawa, Chuo-ku, Tokyo Inside Taiho Construction Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/06 302

Claims (4)

(57) [Claims] 1. An excavator 1 is started horizontally in the ground,
The excavator 1 excavates the horizontal shaft 31 while discharging the excavated earth and sand to the side in the horizontal direction y orthogonal to the propulsion direction x of the excavator 1, and inserts the material from the side of the excavator 1 into the space behind the excavator 1 Then, in the horizontal plate-shaped shield machine for assembling and building the horizontal plate-shaped structure 33, the face protection plate 11 is installed at the front end of the excavator 1 so as to be pivotable about the center O of the drilling tool as a center of rotation. A horizontal plate-shaped shield machine characterized in that the protection plate 11 is connected to a face protection plate turning drive unit attached to the excavator body 2. 2. The horizontal slab shield machine according to claim 1, wherein earth retaining plates are attached to both sides of the excavator main body 2 in a horizontal direction y perpendicular to the propulsion direction x of the excavator 1. 3. The cutting protection plate 11 is provided with
And a substantially semicircular shape surrounding the tool.
Is a horizontal plate-shaped shield machine described in 2. 4. The face protection plate 11 is chord-shaped.
4. The reinforcing member as set forth in claim 3, wherein the reinforcing plate is reinforced.
Horizontal plate shield machine.