JPH08284585A - Shield excavator - Google Patents

Abstract

PURPOSE: To provide a shaft excavating device and an adit excavating device to excavate the adit continuously after the shaft is dug out up to specified depth, to from a cutter for the shaft in an arm shape and draw a rectangular locus by the front end of the cutter for the shaft and remove a wasteful excavat ing section by forming the excavating cross section of the shaft in a rectangular shape when the shaft is dug out at a place in limited width such as a road and to apply a shield excavator even to a road in narrow width. CONSTITUTION: When a motor 15 for driving a shaft body and a motor 18 for driving a cylindrical body are driven, the front ends of arm-shaped cutter 14 for a shaft draw rectangular sectional loci, a shield body 3 for the shaft is propelled up to specified depth, and a motor 77 for driving the shaft body and a motor 80 for driving the cylindrical body are driven. Segments are assembled by an erector device 85, a propelling jack 86 is driven, a shield body 86 for an adit is propelled in the horizontal direction, and the rectangular sectional adit 4 is excavated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine.

[0002]

2. Description of the Related Art Conventionally, when excavating an underground tunnel by a shield method, for example, a starting shaft and a reaching shaft (intermediate shaft) are excavated by using a shaft excavator.
After that, a shield machine is carried into the starting shaft and is excavated by starting from the starting shaft toward the reaching shaft.

When such a vertical shaft is excavated by using a dedicated excavator, a steel sheet pile or an underground continuous wall is used for excavation in order to stop water. By the way, according to the recent spherical shield construction method, without using an excavator dedicated to the shaft, a shield shaft excavator is used to excavate a shaft with a circular cross section from the ground to a predetermined depth from the beginning, and a spherical portion provided for the shield excavator. By bending the, it became possible to excavate the side shaft continuously to the vertical shaft.

As a result, it became possible to omit the steel sheet pile and the continuous underground wall which were required when using the excavator dedicated to the vertical shaft.

[0005]

By the way, a shaft is often excavated in a limited width portion such as a road. In the above spherical shield construction method, since the excavated section of the shaft is circular, the shaft is cut from the shoulder of the road. The vertical shaft may protrude, and in such a case, the shield machine cannot be used to excavate the vertical shaft at that location.

Further, the fact that the vertical excavation cross-section of the vertical shaft causes unnecessary excavation, and there is a problem that it takes a lot of time to treat the residual soil. Then, this invention aims at provision of the shield machine which can solve the said subject.

[0007]

Means for solving the problems in the present invention comprises a shaft excavating device for excavating a shaft and a shaft excavating device for excavating a shaft. The device is a rectangular shaft shield body, and is supported in the shaft shield body, and a through hole is formed along the axis of the shaft shield body at a position eccentric from the center of the shaft shield body by a predetermined amount. The formed first tubular body,
The shaft excavator is provided with a first shaft body rotatably supported in the through hole of the first tubular body, and an arm-shaped vertical shaft cutter attached to the tip of the first shaft body. A horizontal shaft shield main body having an axis in a direction perpendicular to the vertical axis of the vertical shaft shield main body, and a second cylinder supported in the horizontal shaft shield main body and having a through hole formed along the axial center thereof The cylindrical body, the second shaft body rotatably supported in the through hole of the second tubular body, and the horizontal shaft cutter attached to the tip of the second shaft body.

[0008]

In the above means for solving the problems, when the first tubular body and the first shaft body rotatably supported in the through hole of the first tubular body are rotated, the through hole is located from the center of the shaft shield body. Since it is provided in a position that is eccentric by a certain amount, the tip of the shaft cutter draws a rectangular trajectory, and the shaft is excavated in a rectangular cross section along the shape of the shield body for the shaft, and the shaft is excavated by the shaft excavator. After excavating to a predetermined depth, by rotating the second cylindrical body and the second shaft body rotatably supported in the through hole of the second cylindrical body, at the tip of the second shaft body. The attached horizontal shaft cutter is rotated and the horizontal shaft is excavated by the horizontal shaft excavator in a direction perpendicular to the vertical shaft.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the shield machine of the present invention will be described below with reference to FIGS. 1 to 6, in which a vertical shaft 1 for starting and a horizontal shaft 4 (tunnel) are excavated in a continuous operation. It was done like this.

That is, as shown in the overall sectional view of FIG. 1 and the bottom view of FIG. 2, the shield machine has a shaft 1
A shaft excavating device 2 for excavating a shaft is provided, and the shaft excavating device 2 is rotatably supported via a bearing 7 by a partition wall 5 and a ring girder 6 installed in a rectangular shaft shield body 3. A pair of first cylindrical bodies 8 are provided,
A through hole 11 is formed in the first tubular body 8 at a position eccentric from the center of the vertical shaft shield body 3 by a predetermined amount and along the axis 10 of the vertical shaft shield body 3.

A first shaft body 13 is rotatably supported through a through hole 11 of each of the first cylindrical bodies 8 via a bearing 12, and an arm-shaped vertical shaft is provided at the tip of each of the first shaft bodies 13. A cutter 14 is attached.

At the rear portion of the ring girder 6, the first shaft 1
A shaft body driving motor 15 for rotating 3 is mounted via a mounting member 9, and an output shaft of the shaft body driving motor 15 and a rear portion of the first shaft body 13 are a driving gear 16a and a driven gear 17a. Are connected via.

A tubular body driving motor 18 for rotating the first tubular body 8 is attached to the rear portion of the ring girder 6 via an attaching member 9, and the output of the tubular body driving motor 18 is set. The shaft and the rear portion of the first tubular body 8 are provided with a drive gear 16
b and the driven gear 17b are connected.

It should be noted that each mounting motor 9 has a drive motor 1 attached thereto.
A rotary joint (for example, a slip ring or a hydraulic rotary joint) for supplying power or pressure oil to 5, 18 2
0 is provided.

A muddy water slurry pipe 2 penetratingly supported by a partition wall 5 and a ring girder 6 is provided between both first cylindrical bodies 8.
1 is attached, and mud-sending pipes 22 are penetratingly supported at both side ends of the partition wall 5 and the ring girder 6.

By the way, as shown in FIG. 2, the skin plate 23 forming the outer peripheral portion of the shaft shield body 3 has a curved surface portion 26 along the rotation loci of the cutter heads 24 and 25.
And an overhanging surface portion 30 that connects the vicinity of the apex (bulging portion) 27 of one side and the vicinity of the apex (bulging portion) 28 of the other side by bulging outward and slightly outward of the rotation locus, respectively. ing.

Three fixed cutters 31 projecting to the vicinity of the cutter heads 24 and 25 are attached to the front of the overhanging surface portion 30 by bolts or welding, respectively.
The fixed cutter 31 is configured to excavate an unexcavable portion where the cutter heads 24 and 25 cannot excavate the vertical shaft 1.

As shown in the plan views of FIGS. 1 and 3, an erector device 39 for assembling the segment 32 is provided at the rear portion of the vertical shaft shield body 3, and the erector device 39 holds the segment 32. And a turning movement device 34 for moving the segment holding device 33 to a predetermined position. The turning movement device 34 includes the segment holding device 33.
Moving device 48 for moving the wall toward the wall of the shaft 1
And a turning device 40 for turning the segment holding device 33 around a vertical axis along the axis 10 of the shaft shield body 3.

The moving device 48 includes a pair of support members 35 protruding inside the vertical shaft shield body 3, a pair of guide rails 36 extending to the support members 35, and a guide groove 36a of the guide rail 36. The passed moving plate body 37, a sliding jack 38 for sliding the moving plate body 37 along the guide groove 36a, and a pair of mountings mounted on the upper surface of an annular revolving body 49 described later at every 180 °. Body 50,
Pushing jack 51 supported by each mounting body 50
And a support body 53 for supporting the base 52 of the segment holding device 33 by abutting on the tip end portion of each pushing jack 51.
The adjustment jack 59 is attached to the attachment piece 50a provided on the upper portion of the attachment body 50 through a pin and has a tip end portion connected to the support body 53 through a pin.

As shown in the enlarged sectional view of FIG. 4, the swivel device 40 includes an outer annular member 43 provided on a moving plate 37 via a mounting plate 41, and an inner annular member 43 inside the outer annular member 43. An inner annular member 46 that is rotatably attached via a bearing 45 and has a gear 46a formed on its inner peripheral surface, and a movable plate 3
7, a turning motor 47 whose output shaft is meshed with a gear 46a of an inner annular member 46 via a drive gear 47a.
And an annular revolving structure 49 having a rectangular cross section, which is attached to the upper surface of the inner annular member 46 via an attaching member 49a.

The segment holding device 33 includes a support 5
The base 5 slidably mounted in the guide groove 53a of No. 3
2, a guide shaft 52a that penetrates through the base 52 and guides the base 52 along the front surface of the support body 53, and protrudes toward the inner surface side of the shield body at the upper and lower ends of the base 52. The front end portion is inserted into the pair of upper and lower projecting pieces 55a and the lower projecting piece 55a, and the base end portion is the upper projecting piece 55a.
5a attached to the vertical movement jack 56, a lifting plate 57 that moves up and down along the front surface of the base 52 by driving the vertical movement jack 56, and a plurality of support jacks mounted on the front surface of the lifting plate 57. 58 and a segment support piece 60 that is mounted between the support jacks 58 and is attached to the front surface of the elevating plate 57.

A plurality of propulsion jacks 6 for pushing the assembled segment 32 into a predetermined position on the rear portion of the vertical shaft shield body 3 to propel the vertical shaft shield body 3.
2 are arranged via a support plate 61.

FIG. 3 shows that the segment 3 is formed on the rear wall of the shaft 1.
2 shows the case of assembling 2, and in this case, the segment 32 to be assembled is supported by the support piece 60 of the segment holding device 33, the vertical movement jack 56 is driven to adjust the position of the segment 32 in the height direction, and The segment 3 in which the sliding jack 38, the pushing jack 51, and the adjusting jack 59 of the moving device 48 are extended and held by moving the supporting body 53 to a predetermined position along the guide groove 53a.
2 is pushed toward the rear wall of the vertical shaft shield body 3, and the support jack 58 is driven to press the segment 32 against the rear wall of the vertical shaft shield body 3.

FIG. 5 shows a plan view of assembling the segment 32 in the corner portion of the vertical shaft 1. The segment 32 to be assembled is supported by the support piece 60, and the vertical movement jack 56 is driven to raise the height of the segment 32. The position is adjusted in the vertical direction, the base 52 is moved toward the corner along the guide groove 53a of the support 53, and the sliding jack 38, the pushing jack 51, and the adjusting jack 59 of the moving device 48 are moved.
Is extended and pushed toward the rear wall of the vertical shaft shield body 3, and the support jack 58 is driven to press the segment 32 against the corner portion of the vertical shaft shield body 3.

When assembling the segments 32 on the left and right side walls of the vertical shaft 1, the turning motor 47 of the turning device 40 is driven to turn the annular turning body 49 by 90 °, and the segments 32 are assembled in the same manner as described above.

When assembling the segment 32 on the rear wall of the vertical shaft 1, the turning motor 47 of the turning device 40 is driven to further turn the annular turning body 49 by 90 °, and the segment 32 is assembled in the same manner as described above.

By the way, in the vertical shaft excavating device 2, the shaft driving motor 15 and the cylindrical body driving motor 18 are driven so that the tip of the vertical shaft cutter 14 has a rectangular shape and a central portion of its side. The locus bulges outward, and the corners are rounded.

In this way, while the vertical shaft cutter 14 is being rotated, the segment holding device 33 is used to
2, the propulsion jack 62 is driven to propel the vertical shaft shield body 3 in the vertical direction.

Further, the shield machine of the present invention is provided with a horizontal shaft 4
A shaft digging device 65 for excavating a shaft is provided, and the shaft digging device 65 includes a drive motor 1 for the shaft digging device 2.
A rectangular horizontal shaft shield main body 68 is provided which is guided along partition plates 66 arranged behind 5 and 18 and has an axial center 67 in a direction perpendicular to the axial center 10 of the vertical shaft shield main body 3. A second tubular body 73 rotatably supported by a partition 70 and a ring girder 71 via a bearing 72 is provided in the shield main body 68 for a horizontal shaft.

The second tubular body 73 is provided at a position eccentric from the center of the horizontal shaft shield main body 68 by a predetermined amount.
Through hole 74 along axis 67 of shield body 68 for side shaft
The second shaft body 76 is rotatably supported through the through hole 74 via the bearing 75.
An arm-shaped horizontal shaft cutter 77 is attached to the tip of 6.

A shaft drive motor 77 for rotating the second shaft 76 is attached to the rear portion of the second cylindrical body 73.
8, the output shaft of the shaft drive motor 77 and the rear part of the second shaft 76 are connected via a drive gear 77a and a driven gear 76a.

Further, a tubular body driving motor 80 for rotating the second tubular body 73 is attached to the rear portion of the ring girder 71 via a mounting member 78. The output shaft and the rear portion of the second tubular body 73 are connected via a drive gear 80a and a driven gear 73a.

The mounting member 78 includes a drive motor 7
A rotary joint (eg, slip ring or hydraulic rotary joint) for supplying power or pressure oil to 7, 80
1 is provided.

A muddy water slurry pipe 82 is attached to the partition wall 70 and the ring girder 77, and a mud feed pipe 83 is penetratingly supported at both ends of the partition wall 70 and the ring girder 71.

Behind the main shaft shield body 68, an erector device 85 for assembling segments and a propulsion jack 86 are assembled.
The entrance packing 87 is attached to the support plate 61 and the partition plate 66 of the vertical shaft excavating device 2 so as to come into contact with the outer peripheral surface of the horizontal shaft shield main body 68.

After propelling the shaft shield body 3 to a predetermined depth as described above, the shaft drive motor 77 and the tubular body drive motor 80 are driven to drive the shaft shield body 68. In the lateral direction, and when the horizontal shaft shield main body 68 comes out of the vertical shaft shield main body 3, the segments are assembled by the erector device 85, and the propulsion jack 86 is driven to further propel the horizontal shaft shield main body 68 in the horizontal direction. Then, the horizontal shaft 4 having a rectangular cross section is excavated.

As described above, according to the embodiment of the present invention, the vertical shaft excavating device 2 for excavating the vertical shaft 1 and the horizontal shaft excavating device 65 for excavating the horizontal shaft 4 are provided. To excavate the shaft 1 to a predetermined depth, then
Since the side shaft excavating device 65 is driven to excavate the side shaft 4, the shaft 1 and the side shaft 4 can be continuously excavated.

Then, for example, when excavating the vertical shaft 1 in a place having a limited width such as a road, in the spherical shield construction method,
As shown in FIG. 6, the excavated section of the shaft becomes circular, and the shaft 1 protrudes from the shoulder of the road, making it impossible to use the shield machine, but according to the embodiment of the present invention. The shaft cutter 14 of the shaft excavator 2 is formed in the shape of an arm, and the tip of the shaft cutter 14 draws a rectangular trajectory, so the excavated cross section of the shaft 1 is rectangular,
Compared to the case where the excavation cross section is circular, there is no unnecessary excavation (shaded area in the figure), and it can be applied to narrow roads.

Further, since the unnecessary excavated portion is minimized when excavating the vertical shaft 1, the amount of excavated soil can be minimized, and therefore the labor required for the residual soil treatment can be reduced.

[0040]

As is apparent from the above description, the present invention is provided with a shaft excavating device for excavating a shaft and a shaft excavating device for excavating a shaft. After driving and excavating the shaft to a predetermined depth, by continuously excavating the shaft, it is not necessary to re-install the shield machine for excavating the shaft after excavating the shaft,
Therefore, the construction period can be shortened.

Further, a rectangular shaft shield body is provided,
By forming the vertical shaft cutter in the shape of an arm that rotates around an axis that is eccentric to the shaft center of the vertical shaft shield body by a predetermined amount, it is possible to make the vertical cross section of the vertical shaft a rectangular cross section. The useless excavation part is eliminated as compared with the case, and it can be sufficiently applied to a narrow road.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a shield machine showing an embodiment of the present invention.

FIG. 2 is a bottom view of the same.

FIG. 3 is a plan view of the erector device and the turning movement device portion.

FIG. 4 is a partially enlarged sectional view of the turning movement device.

FIG. 5 is a plan view of assembling the segment in the corner portion.

FIG. 6 is a plan view showing a comparison between a cross-sectional shape of a vertical shaft excavated by a conventional shield machine and a shape of a vertical shaft excavated by the shield machine of the present invention.

[Explanation of symbols]

 1 Shaft 2 Shaft excavator 3 Shaft shield body 4 Side shaft 8 First tubular body 13 First shaft body 14 Vertical shaft cutter 15 Shaft body driving motor 18 Cylinder body driving motor 24 Cutter head 25 Cutter head 26 Curved Surface part 30 Overhanging surface part 31 Fixed cutter 32 Segment 33 Segment holding device 34 Turning movement device 36 Guide rail 37 Moving plate body 39 Elector device 40 Turning device 48 Moving device 58 Support jack 62 Propulsion jack 65 Digging device 68 For horizontal mining Shield body 73 Second cylindrical body 77 Side pit cutter 85 Electa device

Claims (1)

[Claims] 1. A shaft excavating device for excavating a shaft,
A shaft shaft excavating device for excavating a shaft is provided, wherein the shaft shaft excavating device is supported in the rectangular shaft shaft shield body and the shaft shaft shield body, and only a predetermined amount from the center of the shaft shaft shield body. At an eccentric position, a first cylindrical body having a through hole formed along the axis of the shaft shield main body, and a first shaft body rotatably supported through the through hole of the first cylindrical body, An arm-shaped shaft shaft cutter attached to the tip of the first shaft body, and the shaft shaft excavating device has a shaft shaft shield body having a shaft center in a direction perpendicular to the shaft shaft of the shaft shaft shield body. A second cylindrical body supported in the shaft main body and having a through hole formed along its axis, and a second cylindrical body rotatably supported in the through hole of the second cylindrical body. It is equipped with a shaft and a horizontal shaft cutter attached to the tip of this second shaft. The shield machine and butterflies.