JPH06240981A - Accessible method in shield machine - Google Patents

Abstract

PURPOSE:To enable it to check the breaking of natural ground and the penetration of ground water to the minimum at the time of removal of an arrival wall and to make an amount of supplementary injection at the arrival of a shield machine and a propeller so as to be suppliable with a modicum. CONSTITUTION:Both outer and inner cylinder parts 1 and 2 are made up of capable of connecting and separating them with each other, and a cutter part 11 is installed in a front side of this inner cylinder part 2, using a shield machine and a propeller composed of making at least one piece of cutter spokes of this cutter part 11 extensible, and these outer and inner cylinder parts 1 and 2 are coupled as one body till this cutter part 11 is reached to an arrival wall 30. An extensible cutter spoke 15 is advanced forward in a state of being extended and, after the cutter part 11 is reached to the arrival wall 30, the extensible cutter spoke 15 is contracted. After these outer and inner cylinder parts 1 and 2 are separated from each other, the outer cylinder part 1 alone is advanced forward, and a front end face of the outer cylinder part 1 is reached to the arrival wall 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reaching a reaching wall in a shield machine.

[0002]

2. Description of the Related Art Conventionally, the method of reaching shield machines and propulsion machines has been to improve the ground in advance to reach the ground, to make the ground in the reaching area self-sustaining, and to reach that portion with a shield machine to reach the shaft. The method of installing the entrance shaft, removing the earth retaining part of the reaching part, and pushing it into the reaching shaft is adopted.

[0003]

However, the above-mentioned conventional technique has the following problems. (1) In the conventional shield machine and propulsion machine, since there is a large gap between the cutter bit and the excavator body, it takes time for the shield machine to enter the reaching shaft, and there is a risk of face collapse. (2) Upon arrival, a lot of supplemental injection for ground improvement is required.

The present invention has been proposed in view of the above points, and an object of the present invention is to minimize the collapse of the ground and the intrusion of groundwater at the time of removal of the reaching wall, and moreover, the shield machine. The present invention aims to provide a method for reaching a shield machine, in which a small amount of supplementary injection is not required when reaching a propulsion machine.

Another object of the present invention is to separate the inner cylinder part from the outer cylinder part after the shield machine or the propulsion machine arrives, and to collect and reuse the inner cylinder part including the cutter part and the driving part. It is intended to provide a possible reach method in a shield machine.

[0006]

In order to achieve the above object, the present invention is configured such that the outer cylinder portion 1 and the inner cylinder portion 2 can be connected to and separated from each other, and the cutter portion 11 is provided on the front side of the inner cylinder portion 2.
A shield machine or a propulsion machine is provided in which at least one of the cutas pork of the cutter portion 11 is expandable and contractable, and the outer cylinder portion 1 and the inner cylinder portion 2 are used until the cutter portion 11 reaches the arrival wall 30. While integrally connecting and, the expandable cutaway pork 15 is dug in a stretched state, after the cutter portion 11 reaches the reaching wall 30, the expandable cutaway pork 15 is reduced and the outer tubular portion 1 and After disconnecting the inner tubular portion 2, only the outer tubular portion 1 is propelled so that the front end face of the outer tubular portion 1 reaches the reaching wall 30.

[0007]

According to the present invention, the outer tubular portion 1 and the inner tubular portion 2 are configured to be connectable to and detachable from each other, and the cutter portion 11 is provided on the front side of the inner tubular portion 2, and at least the cutas pork of the cutter portion 11 is provided. A shield machine or propulsion machine, which is configured to be expandable and contractible, is used.

During excavation until the cutter portion 11 reaches the reaching wall 30, the outer cylinder portion 1 and the inner cylinder portion 2 are integrally connected, and the extendable cutas pork 15 is extended. To do.

Then, after the cutter portion 11 reaches the arrival wall 30, the expandable and contractible cutas pork 15 is contracted and the outer cylinder portion 1 and the inner cylinder portion 2 are separated from each other. After that, the outer tubular portion 1 is propelled so that the front end face of the outer tubular portion 1 reaches the reaching wall 30.

As described above, according to the present invention, since the front end face of the outer tubular portion 1 is provided on the reaching wall 30, the collapse of the ground and the intrusion of groundwater can be suppressed to the minimum when the reaching wall is removed. it can. In addition, it becomes possible to provide supplemental injection on arrival with a small amount.

Further, in the present invention, the outer cylinder 1 and the inner cylinder 2 are joined again after the front end surface of the outer cylinder 1 is pressed against the reaching wall 30 and brought into close contact therewith. Then, the shield machine or the propulsion device is pushed into the reaching shaft, or the outer cylinder part 1 is pushed into the reaching shaft.

As a result, after the shield machine or the propulsion machine arrives, the inner cylinder part 2 including the cutter part 11 and the drive part can be completely recovered and reused.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a partial vertical cross-sectional view showing a state in which a cutter portion of a shield machine reaches a reaching wall, and FIG. 2 shows a shield on the reaching wall. It is a partial longitudinal cross-sectional view showing a state in which the outer cylinder portion is pressed after the machine arrives.

In the first embodiment shown in these drawings, an outer cylinder portion 1, an inner cylinder portion 2, a cutter portion 11 provided on the front side of the inner cylinder portion 2, and a drive device for the cutter portion 11. 21,
A horizontal shaft is excavated by using a shield machine provided with a shield jack 26 and an earth discharging device 29 so as to reach the reaching wall 30.

The outer cylinder portion 1 of the shield machine has a partition wall 3 and
It has a sliding part 5. The partition wall 3 is formed in a ring shape and is fixed to the inside of the outer tubular portion 1 near the front end portion. The sliding portion 5 is formed in a cylindrical shape having an inner diameter flush with the inner diameter of the partition wall 3, a front end portion fixed to the rear surface of the partition wall 3, and a rear end portion attached to the outer cylindrical portion 1 by a ring-shaped support member 7. It is fixed.

On the other hand, the inner cylindrical portion 2 has a partition wall 4 and a sliding portion 6.
And have. The partition wall 4 is the partition wall 3 of the outer cylinder part 1.
Is inscribed in a disk shape. The sliding portion 6 is
It is formed in a tubular shape that is inscribed in the sliding portion 5 of the outer tubular portion 1, is fixed to the rear surface of the partition wall 4, and is supported by a rib-shaped support member 8. A bearing 10 for the rotary shaft of the cutter 11 is attached to the center of the partition wall 4, and an inlet 28 for earth and sand is provided at the lower end.

The outer cylinder part 1 and the inner cylinder part 2 are slidable parts 5, 5.
6 are integrally coupled via a thrust transmission bolt 9 which is inserted and fastened in bolt through holes provided at intervals in the length direction of 6, and the thrust transmission bolt 9 is removed and separated to form a sliding portion. The outer tubular portion 1 is configured to be slidable with respect to the inner tubular portion 2 via 5, and 6.

The cutter portion 11 has a rotary shaft 12, a boss 13 provided at a front end portion of the rotary shaft 12, a fixed cutlass pork 14 and an expandable and contractable cuttus pork 15. The rotating shaft 12 is supported by a bearing 10 attached to the partition wall 4 of the inner cylindrical portion 2 and is connected to a driving device 21. The boss 13 is provided at the front end of the rotary shaft 12, and a central leading cutting bit 17 is provided on the front surface of the boss 13. The fixed Katta pork 1
A plurality of 4 are attached to the outer periphery of the boss 13 at intervals. In this embodiment, one expandable and contractible Kattus pork 15 is provided on the outer circumference of the boss 13 so that it can be expanded and contracted in the radial direction of the inner tube portion 2 via the Kattus spoke expansion and contraction jack 16 incorporated therein. It has become.
Bits 18 are provided on the outer surfaces of the fixed cutas pork 14 and the expandable cutas pork 15, respectively, and kneading blades 19 are provided on the inner surface, that is, the face facing the facet 20.

The drive device 21 includes a frame 22 fixed to the rear surface side of the partition wall 4 of the inner cylinder portion 2, and the frame 22.
The motor 23 supported by the motor 23, the pinion 24 connected to the motor 23, and the gear 25 attached to the rotary shaft 12 and meshed with the pinion 24.

The shield jack 26 is installed on the inner side of the outer cylinder part 1 and applies a reaction force to the segment 27 assembled in the rear of the shield machine to support the support member 7 of the sliding part 5 of the outer cylinder part 1. It is supposed to be pushed.

The earth unloading device 29 is installed inside the inner cylinder portion 2, and takes in the excavated earth and sand through the earth and sand inlet 28 provided in the partition wall 4 of the inner cylinder portion 2 and conveys it to the rear of the shield machine. It is supposed to do.

Next, an arrival method performed by using the shield machine will be described.

First, until reaching the reaching wall 30, as shown in FIG.
As shown in FIG. 2, the outer tubular portion 1 and the inner tubular portion 2 are connected to the sliding portions 5, 6
It is inserted into the bolt through hole provided in the and is integrally connected by the tightened thrust transmission bolt 9. In addition, the expandable Kattus pork 15 provided on the boss 13 of the cutter unit 11 is extended via the Cutas pork expansion / contraction jack 16 according to the outer diameter of the outer cylinder unit 1.

In this state, the motor 23 of the drive unit 21 is driven, and the rotary shaft 1 is driven through the pinion 24 and the gear 25.
Rotate 2. As a result, the boss 13 of the cutter unit 11
A central leading cutting bit 17 provided on the front surface of the ground excavates the ground ahead of the other bits 18, and subsequently the boss 13
Bit 1 on fixed cutas pork 14 and stretchable cutas pork 15 attached to the outer circumference of
8 excavates the ground around the central leading cutting bit 17.

If necessary, a mud making material such as bentonite is injected into the excavated earth and sand, and then the face chamber 20.
It is taken in by and is agitated by the mixing blades 19 provided on the fixed cutas pork 14 and the expandable cutas pork 15, and the excavated earth and sand and the mud material are kneaded, and the plasticity is sufficient to hold down the face. Sediment with fluidity is made. Further, the excavated earth and sand is taken into the earth discharging device 29 through the inlet 28 provided in the partition wall 4 of the inner tubular portion 2 and conveyed to the rear of the shield machine.

During the aforementioned excavation, a segment 27 is built behind the shield machine. Then, the shield jack 26 installed on the inner side of the outer tubular portion 1 is extended, a reaction force is applied to the segment 27, and the supporting member 7 of the sliding portion 5 of the outer tubular portion 1 is pushed. In this state, as described above, the sliding portions 5 and 6 of the outer tubular portion 1 and the inner tubular portion 2 are coupled to each other through the thrust transmission bolts 9, so that the sliding portion 5 of the outer tubular portion 1 is By pushing the support member 7, the outer tubular portion 1 and the inner tubular portion 2 are integrally propelled, and by repeating the above operation,
The central leading cutting bit 17 of the cutter portion 11 contacts the reaching wall 30.

When the central leading cutting bit 17 of the cutter portion 11 reaches the reaching wall 30, the thrust transmission bolt 9 is removed and the outer cylinder portion 1 and the inner cylinder portion 2 are separated. Also, the expandable Kattus pork 15 is contracted by the Cutas pork expansion jack 16 so that it does not hit the expandable Kattus pork 15 when the outer cylinder part 1 is pushed out.

Then, the shield jack 26 is extended, and the reaction force is applied to the segment 27 at this time as well, and the outer cylinder 1
The support member 7 of the sliding portion 5 is pushed. In this state, the outer tubular portion 1 and the inner tubular portion 2 are separated from each other, and the central leading cutting bit 17 of the cutter portion 11 provided on the inner tubular portion 2 is attached to the reaching wall 3
Since it is in contact with 0, only the outer tubular portion 1 is pushed forward, and as shown in FIG.
Will be installed in.

After that, the outer cylinder portion 1 and the inner cylinder portion 2 are again joined together by the thrust transmission bolts 9 via the sliding portions 5 and 6, and the shield jack 26 is extended to extend the outer cylinder portion 1 and the inner cylinder. The part 2 is pushed together into the reaching shaft, or only the outer cylinder part 1 is pushed into the reaching shaft.

As described above, in this first embodiment, the front end face of the outer cylinder portion 1 of the shield machine is provided on the reaching wall 30 so as to prevent collapse of the ground and intrusion of groundwater when the reaching wall is removed. It can be reached safely with a minimum.

Further, when the shield machine arrives, supplementary injection for ground improvement can be suppressed to a small amount, which can be economically achieved.

Further, after the shield machine arrives, the inner cylinder portion 2 including the cutter portion 11 and the driving device 21 as the driving portion can be completely recovered and reused in the reaching shaft. Also, when there is no working space in the reaching shaft, only the inner cylinder part can be pulled out to the starting side and reused.

Next, FIGS. 3 and 4 show a second embodiment of the present invention. FIG. 3 is a partial longitudinal sectional view showing a state where the cutter portion of the propulsion machine reaches the reaching wall. FIG. 6 is a partial vertical cross-sectional view showing a state in which the outer cylinder portion is pushed in after the propulsion device reaches the reaching wall.

In the second embodiment shown in these figures, the fume pipe 31 is installed behind the set of the outer cylinder portion 1 and the inner cylinder portion 2. An outer shell portion 32 is attached to the front end portion of the fume pipe 31, and an original push jack or an intermediate push jack (neither is shown) or the like is provided on the rear side.
An inner shell portion 33 is arranged across the inside of the outer shell portion 32 and the inside of the inner tubular portion 2. The inner shell 33 and the inner cylinder 2
A direction correction jack 41 is provided between them. An intermediate cylinder 42 is fixed to the front end of the outer shell 32 in the direction of the outer cylinder 1.

The outer shell 32 includes an outer shell 34 fixed to the outside of the front end of the fume tube 31, and a front end plate 36 formed in a ring shape and fixed to the inner circumference of the front end of the outer shell 34. , A rear end plate 37 formed in the same ring shape and fixed to the inner circumference of the outer casing 34 by abutting on the front end surface of the fume tube 31, and a front end plate 36 and a rear end formed in a tubular shape. Outer shell sliding part 3 fixed according to the inner diameter between the plates 37
8 and.

The inner shell portion 33 is formed in a tubular shape so as to be inscribed in the outer shell sliding portion 38 and in a tubular shape so as to be inscribed in the sliding portion 6 of the inner tubular portion 2. And inner shell sliding portion 39
And an inner casing 35 connected to the.

The outer shell portion 32 and the inner shell portion 33 are inserted into bolt through holes provided at intervals in the lengthwise direction of the outer shell sliding portion 38 and the inner shell sliding portion 39 and fastened to each other for fastening. The thrust transmission bolts 40 are integrally connected via the transmission bolts 40, and the thrust transmission bolts 40 are removed to separate the inner portion 33.
The outer shell 32 can be slid forward relative to the outer shell 32.

The direction correcting jack 41 has an inner shell 33.
It is attached over the inside of the inner shell 35 and the inside of the sliding portion 6 of the inner cylinder 2.

The intermediate cylinder 42 is formed to have a smaller diameter than the outer diameter of the outer cylinder part 1, is connected to the outer shell part 32 side, and extends in the direction of the outer cylinder part 1, but is fixed to the outer cylinder part 1. Not been done. A portion 1'protruding toward the outer shell portion 32 side of the outer tubular portion 1
A seal member 43 is provided in the circumferential space between the intermediate cylinders 42.

The other structure of the second embodiment is the same as that of the first embodiment.

Next, an arrival method performed by using the propulsion device of the second embodiment will be described.

Until the propulsion machine reaches the arrival wall 30, as shown in FIG. 3, the outer cylinder portion 1 and the inner cylinder portion 2 are connected to the sliding portions 5, 5.
The thrust transmission bolts 9 are inserted into the bolt through holes provided in 6 and fastened together to be integrally joined, and the fume pipe 3
The outer shell portion 32 and the inner shell portion 33 of No. 1 are integrally coupled by inserting and fastening the thrust transmission bolts 40 into the bolt through holes provided in the outer shell sliding portion 38 and the inner shell sliding portion 39. In addition, the cutter part 11 has an expandable and contractible cutlet pork 1
5 by means of the Kattaspoke expansion and contraction jack 16
And the outer cylinder 34 is expanded according to the outer diameter of the outer cylinder 34.

In this state, as in the first embodiment, the rotary shaft 12 is rotated by the drive device 21, and the central leading cutting bit 17 of the cutter portion 11 and the fixed cutlass pork 14 are provided.
And the ground 18 is excavated by the bit 18 provided on the expandable Kattus pork 15, and then the excavated earth and sand in the face chamber 20 by the mixing blades 19 provided on the fixed Cutas pork 14 and the expandable Kattus pork 15. And knead the mud making material. Further, the excavated earth and sand is taken into the earth discharging device 29 through the inlet 28 provided in the partition wall 4 of the inner cylindrical portion 2 and conveyed to the rear of the propulsion device.

When the propulsion direction is corrected during excavation, in this embodiment, the direction correction jack 41 is shortened when the direction is corrected upward, and the direction correction jack 41 is extended when the direction is corrected downward.

Then, the fume pipe 31 is pushed by the source push jack or the middle push jack, and the propulsion device is pushed until the central leading cutting bit 17 of the cutter portion 11 abuts on the reaching wall 30.

After the center leading cutting bit 17 of the cutter portion 11 reaches the reaching wall 30, the thrust transmission bolt 9 connecting the sliding portions 5 and 6 of the outer tubular portion 1 and the inner tubular portion 2 is removed to remove it from the outside. The tubular portion 1 and the inner tubular portion 2 are separated. Further, the thrust transmission bolt 40 connecting the outer shell sliding portion 38 of the outer shell portion 32 and the inner shell sliding portion 39 of the inner shell portion 33 is removed to separate the outer shell portion 32 and the inner shell portion 33. Further, the expandable Kattus pork 15 of the cutter unit 11 is reduced by the Cutas pork expansion / contraction jack 16 so as not to hit the expandable Kattus pork 15 when the outer cylinder unit 1 is pushed out.

After that, when the fume pipe 31 is pushed by the original push jack or the middle push jack, only the outer cylinder part 1 is pushed out through the outer shell part 32 and the intermediate cylinder 42.
As shown in, the front end surface of the outer tubular portion 1 is pressed against the reaching wall 30 and is provided in a standing manner.

After the front end surface of the outer cylinder portion 1 is provided on the reaching wall 30, the sliding portions 5 and 6 of the outer cylinder portion 1 and the inner cylinder portion 2 are again connected by the thrust transmission bolts 9 to form the outer shell portion 32. The outer shell sliding portion 38 and the inner shell sliding portion 39 of the inner shell portion 33 are connected by a thrust transmission bolt 40, and the reaching portion is removed from the inside of the reaching shaft, and the fume pipe 31 is fed by a source push jack or an intermediate push jack. Press to push the propulsion unit into the reaching shaft, or push the outer cylinder into the reaching shaft.

Also in this second embodiment, since the front end face of the outer cylinder portion 1 of the propulsion unit is provided on the reaching wall 30, the collapse of the ground and the intrusion of groundwater are minimized when the reaching wall is removed. It can be suppressed and safely reached.

In addition, supplementary injection for ground improvement can be suppressed to a small amount at the time of arrival, and it can be economically achieved.

Further, when the inner cylinder portion 2 including the cutter portion 11 and the drive device 21 and the inner shell portion 33 are completely recovered in the arrival shaft after the arrival of the propulsion device, or there is no working space on the arrival shaft side. It is also possible to pull out the inner cylinder part to the starting side and reuse it.

In both the first and second embodiments, a box-extracting part is formed in the side wall of the reaching shaft, which is slightly larger than the outer diameter of the shield machine or the propulsion machine, and the outer cylinder part 1 is pushed into it. If it is reached, it will be possible to reach it even more safely.

In addition, in both the first and second embodiments, not only one of the cut-and-spokes can be expanded and contracted, but a shield machine and a propulsion machine in which all the cut-and-spokes can be expanded and contracted can also be used. Good.

[0054]

As described above, according to the present invention, the outer cylinder portion 1 and the inner cylinder portion 2 are configured to be connectable to and separable from each other, and the cutter portion 11 is provided on the front side of the inner cylinder portion 2. 11
Using a shield machine or a propulsion machine in which at least one of the cutass porks of FIG.
Until it reaches 0, the outer cylinder part 1 and the inner cylinder part 2 are integrally joined, and the expandable cutas pork 15 is dug in a stretched state, and after the cutter part 11 reaches the arrival wall 30, The expandable Kattus pork 15 is contracted, and the outer cylinder part 1 and the inner cylinder part 2 are separated, and then only the outer cylinder part 1 is propelled so that the front end face of the outer cylinder part 1 reaches the reaching wall 30. Therefore, it is possible to minimize the collapse of the ground and the intrusion of groundwater when the reaching wall is removed, and therefore, it has the effect that it can be safely reached.In addition, a small amount of supplementary injection when the shield machine or propulsion machine arrives. Since it is sufficient, there is an effect that can be economically reached.

Further, in the present invention, after a machine such as a shield machine or a propulsion machine has reached the inside of the shaft on the arrival side, the inner cylinder part including the drive part together with the Kattus spoke 15 can be separated from the outer cylinder part. The inner cylinder side can be recovered to the starting vertical shaft side through the completed mine and reused, the equipment can be effectively reused, and waste can be eliminated.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view showing a first embodiment of the present invention and showing a state when a cutter portion of a shield machine reaches a reaching wall.

FIG. 2 is a partial vertical cross-sectional view showing a state in which the outer cylinder portion is pushed in after the cutter portion of the shield machine reaches the reaching wall in the first embodiment.

FIG. 3 is a partial vertical cross-sectional view showing a second embodiment of the present invention and showing a state when the cutter portion of the propulsion machine reaches the reaching wall.

FIG. 4 is a partial vertical cross-sectional view showing a state in which the outer cylinder portion and the outer shell portion are pushed in after the cutter portion of the propulsion device reaches the reaching wall in the second embodiment.

[Explanation of symbols]

 1 outer cylinder part 2 inner cylinder part 3,4 partition wall 5,6 sliding part 9 thrust transmission bolt 11 cutter part 12 rotating shaft 13 boss 14 fixed Kattus spoke 15 expandable Kattus spoke 16 cutter spoke telescopic jack 17 center precutting Bit 18 Bit 21 Drive device 26 Shield jack 27 Segment 29 Soil removal device 30 Reaching wall 31 Fume tube 32 Outer shell portion 33 Inner shell portion 34 Outer shell tube 35 Inner shell tube 38 Outer shell sliding portion 39 Inner shell sliding portion 40 Thrust transmission bolt 42 Intermediate tube

Claims (1)

[Claims] 1. An outer cylinder part 1 and an inner cylinder part 2 are configured to be connectable to and separable from each other, and a cutter part 1 is provided on the front side of the inner cylinder part 2.
1 is used, and at least one of the cut-and-spokes of the cutter unit 11 is configured to be expandable / contractible by using a shield machine or a propulsion device, and the outer cylinder unit 1 and the inner cylinder unit are used until the cutter unit 11 reaches the reaching wall 30. When the cutter portion 11 reaches the reaching wall 30, the expandable cutaway pork 15 is contracted while the elastic cuttable pork 15 is contracted while the two are integrally connected to each other and the expandable cutaway pork 15 is extended. And the inner cylinder portion 2 are separated from each other, and then only the outer cylinder portion 1 is propelled so that the front end surface of the outer cylinder portion 1 reaches the arrival wall 30.