JP2001173391A - Gable formwork device for tunnel excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gable formwork device for a tunnel excavator capable of preventing water leakage to the inside of the tunnel without applying lining even though expansion cracks have occurred at the construction joints in concrete. SOLUTION: A peripheral wall of a tunnel is arranged at the predetermined intervals, a space between the inner formwork and the peripheral wall is closed with a ring-shaped gable formwork 18 at predetermined intervals, and a water expansion seal push-out device 31 is installed to the gable formwork 18 for pushing out a water expansion seal 30 to be interposed in a construction joint for concrete C. The water expansion seal push-out device 31 has a ring-shaped groove 18a drilled to the end face of the gable formwork and capable of inserting and retaining a ring-shaped water expansion seal 30, a ring-shaped plate 35 for pushing out and inserting a water expansive seal 30 which is inserted and retained in the ring-shaped groove 18a in the groove for inserting water expansion seal, and a plurality of water expansion seal push-out jacks 32 for moving forward and retreating the ring-shaped plate 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wife formwork apparatus for a tunnel excavator, and more particularly to an ECL (Excluded Concrete).
Lining) and a wife formwork apparatus for a tunnel excavator employing a lining method.

[0002]

2. Description of the Related Art A muddy shield excavator is well known as a tunnel excavator employing the above lining method. This is, while excavating the ground with a cutter head provided on the front part of the shielded excavator body having an outer cylindrical shape, covering the peripheral wall of the excavated tunnel with an inner form at a predetermined interval, and forming the inner form with the inner form. By arranging a reinforcing bar between the peripheral wall and the like,
Concrete is cast directly (cast in place) and lining is performed after curing and hardening.

In the above-mentioned muddy shield excavator, a ring-shaped formwork (device) for closing the space between the peripheral wall of the tunnel and the inner formwork is provided. The concrete is cast, and the inside and outside of the space can be slid in the front-rear direction (the longitudinal direction of the tunnel) by the expansion and contraction of the end form jack.

[0004]

However, in the above-mentioned lining method, inevitably,
There is a problem that a seam of concrete is generated and expansion cracks are generated in the portion as it is and water leaks in the pit. Therefore, in the related art, a secondary lining has been performed by providing a drainage portion on the inner surface of the concrete and spraying the fiber, or finishing the required inner surface.

[0005] For this reason, there has been a problem that the cost increases due to the secondary lining and the like, and that it also becomes a major factor of delay in the construction period.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned circumstances, and it is proposed that a tunnel excavator capable of preventing water leakage into a mine without performing secondary lining even if an expansion crack occurs at a joint of concrete. It is an object to provide a formwork device.

[0007]

According to the present invention, there is provided a wand form apparatus for a tunnel excavator which achieves the above object, covers a peripheral wall of a dug tunnel by a predetermined distance from an inner form,
In a tunnel excavator in which the space between the inner form and the peripheral wall is closed with a ring-shaped formwork, and concrete is directly poured into the space through the formwork,
A water expansion seal extrusion device for extruding a water expansion seal interposed at the joint of the concrete is assembled to the end form.

[0008] The above-mentioned water-swelling seal pushing device inserts a ring-shaped water-swelling seal into the end face of the end form.
A ring-shaped groove that can be held, and a water-expandable seal insertion groove formed on the concrete end face that is inserted into the ring-shaped groove so as to be able to advance and retreat, and is inserted and held in the ring-shaped groove in the water-expandable seal insertion groove. It has a ring-shaped plate for pushing out and inserting the formed water-expandable seal, and a plurality of jacks for moving the ring-shaped plate forward and backward.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wand formwork apparatus for a tunnel excavator according to the present invention.

[Embodiment] [Configuration] FIG. 1 shows an embodiment of the present invention, and is a cross-sectional view of a water expansion seal extruding apparatus for a wand mold, FIG. 2 is an operation state diagram, and FIG. The state diagram, FIG.
Side sectional view of a muddy shield excavator employing CL, FIG.
Fig. 6 is an overall layout view of the wife formwork device also viewed from the cutting blade side,
Fig. 7 is an overall layout view of the wife formwork device as viewed from the tail side, and Fig. 7 is an overall side sectional view of the wife formwork device.

As shown in FIG. 4, a cutter head 3 is rotatably mounted on a bulkhead 2 in front of a cylindrical skin plate 1a of an excavator body 1 by an intermediate support method. A large number of cutter bits (not shown) are mounted on the front surface of the cutter head 3, and an appropriate number of copy cutters 4 are mounted on an outer peripheral portion of the cutter head 3 via a jack 5 so as to be able to expand and contract (appear). A ring gear 6 is fixed to a rear portion of the cutter head 3.

A cutter turning motor 7 as cutter head driving means is attached to the partition 2, and a driving gear 8 of the cutter turning motor 7 meshes with the ring gear 6. Accordingly, when the cutter swing motor 7 is operated to rotate the drive gear 8, the cutter head 3 is rotated via the ring gear 6.

An appropriate number of agitators 11 are provided in a chamber chamber 10 defined by the cutter head 3 and the partition wall 2, and each can be turned by an electric motor 12. In the chamber 10, outlets and inlets of a sludge pipe 13 and a sludge pipe 14 connected to and connected to a feeding and discharging apparatus behind the tunnel are opened.

A large number of shield jacks 16 are arranged in the ring-shaped reinforcing portion 15 on the rear side of the skin plate 1a at predetermined intervals in the circumferential direction, and a plurality of wife form jacks 17 are provided (FIG. 5). Inside, 24 symmetrical members are arranged. As shown in FIGS. 5 and 6, the end of the piston rod of the wand form jack 17 is pin-connected to a wand form 18 described below, which is disposed in the space between the inner form 19 and the skin plate 1a.

A support member 20 is attached to the ring-shaped reinforcing portion 15, and an inner mold 1 assembled with an erector 21 for assembling the inner mold 19 on the support member 20.
9 is provided with a shape holding device 22 for holding a perfect circle (shape). In FIG. 4, reference numeral 23 denotes a feeder device for the inner mold 19, 2
Reference numeral 4 denotes a demolding device, and reference numeral 40 denotes a pipe for placing concrete.

As shown in FIG. 7, the wand formwork 18 includes the skin plate 1a (peripheral wall of the tunnel) and the inner formwork 19.
And a ring-shaped member for closing the space, and an outer peripheral surface of which is fitted with a wand form seal 25 for slidingly (elastically) in contact with the inner peripheral surface of the skin plate 1a and stopping (sealing) the water. Be mounted.

Further, an inner form 19 is provided on the inner peripheral surface of the wife form 18.
A stainless gasket 26 as a plate-like packing for sliding (elastic) contact with the outer peripheral surface of the member to perform water sealing (sealing) of the portion is mounted, and a stainless steel gasket pushing-up device 27 as a gasket pushing-up device (symmetrical in FIG. 5). The stainless steel packing 26 is pushed up when necessary by the twelve stainless steel packing push-up jacks 28).

A concrete pouring hole 29 (see FIG. 5 and FIG. 6, sixteen equally spaced locations) penetrates the inside of the formwork 18 and hardened concrete. A water-expandable seal push-out device 31 (1 symmetrically arranged in FIG. 6) for extruding a water-expandable seal (expands when containing water and exerts a sealing effect) 30 on the joint surface of
A dead concrete extruder 33 (see FIG. 6 symmetrically arranged 16 dead concretes) for extruding (peeling) dead concrete adhered to the end face of the end form 18 with two water expansion seal extrusion jacks 32. (See the extrusion jack 34).

The water expansion seal pushing device 31 is shown in FIG.
As shown in FIG. 1, the ring-shaped groove 1 is formed in the end surface of the end mold 18 and can receive and insert the ring-shaped water-expandable seal 30.
8a and a ring-shaped water expansion seal insertion groove Ca which is inserted into the ring-shaped groove 18a so as to be able to advance and retreat (slidably in the longitudinal direction of the tunnel) and into the end face (joining surface) of the concrete C.
And the water expansion seal 30 inserted and held in the ring-shaped groove 18a in the water expansion seal insertion groove Ca.
A ring-shaped plate 35 for pushing out and inserting, and twelve water-swelling seal push-out jacks 32 for moving the ring-shaped plate 35 forward and backward through a connecting rod 36.

In the illustrated example, each of the connecting rods 36 is slidably inserted into a guide hole 18b communicating with the ring-shaped groove 18a. The head of the extrusion jack 32 is supported laterally via a bracket 37 on the rear end surface of the end form 18. In the figure, reference numeral 38 denotes a seal member.

[Operation / Effect] With this configuration, the cutter swing motor 7 is operated to rotate the cutter head 3, and at the same time, the shield jack 16 is extended while muddy water is sent from the mud feed pipe 13 into the chamber chamber 10. When the excavator body 1 is propelled (advanced), a large number of cutter bits (and copy cutters 4) mounted on the cutter head 3 excavate the ground in front. The excavated earth and sand is discharged from the chamber chamber 10 to the outside by a mud pipe 14.

At this time, the propulsion reaction force of the excavator body 1 is applied to the inner mold 19 to which the tip of the piston rod of the shield jack 16 contacts, and the concrete C which has been cast and cured and hardened.
And frictional force. Also, with this excavation, the inner mold 19 is assembled at the forefront position by returning the pieces at the last position in turn by the demolding device 24 and the feeder device 23.

Further, with the excavation, the skin plate 1
Concrete C is passed through the concrete casting pipe 40 from the concrete casting opening 29 of the end mold 18 into the space between the inner mold 19 and the space a.

At this time, in this embodiment, prior to the splicing of the concrete C, a water-swelling seal 30 is inserted so that the water-swelling seal 30 is attached to the end face (splicing face) of the concrete C being cast and cured. The use groove Ca is formed.

That is, as shown in FIG. 2, after the end form jack 18 is advanced by the extension of the end form jack 17 until the end form 18 comes into contact with the end face of the concrete C, all the water expansion seal pushing jacks 32 are unillustrated hydraulically. By extending the ring-shaped plate 35 while being simultaneously extended by the control device and inserted into the ring-shaped groove 18a, a groove Ca for inserting a water expansion seal is formed on the end face of the concrete C. FIG. 2 shows a state after the formation.

Next, as shown in FIG. 3, with the wand mold 18 removed from the space by the contraction of the wand mold jack 17, all the water expansion seal pushing jacks 32 are slightly shrunk to form the ring. The water expansion seal 30 is inserted and held in the ring-shaped groove 18a in front of the plate 35 from the inside of the machine.

After that, after the wife formwork 18 is advanced by the extension of the wife form jack 17 until it comes into contact with the end face of the concrete C, all the water expansion seal push-out jacks 32 are simultaneously extended to obtain a ring shape. The water expansion seal 30 inserted and held in the groove 18a is pushed out by the ring-shaped plate 35 and is mounted in the water expansion seal insertion groove Ca. FIG. 3 shows a state before and after mounting.

Thereafter, as the excavation proceeds, concrete C is spliced into the space.
0 is interposed. Thereby, even if an expansion-contraction crack occurs at the joint, water leakage into the machine is prevented by the sealing action of the water expansion seal 30.

As described above, in this embodiment, water leakage into the mine can be prevented without performing secondary lining, so that cost increase and construction period delay are avoided.

In this embodiment, the tunnel excavator of the present invention is described as a muddy shield excavator. However, the present invention may be applied to an earth pressure type shield excavator or to a tunnel boring machine for excavating rock. You can also. In addition, it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0031]

As described above in detail, the wife formwork apparatus of the tunnel excavator according to claim 1 of the present invention covers the excavated tunnel peripheral wall with the inner formwork at a predetermined interval, In a tunnel excavator, a space between the inner form and the peripheral wall is closed with a ring-shaped form, and concrete is directly driven into the space through the form. In addition, a water expansion seal extruding device for extruding a water expansion seal to be interposed at the joint of the concrete is characterized in that it is interposed. Even if a telescopic crack occurs at the joint, it is possible to prevent water leakage into the mine without applying a secondary lining, thereby avoiding an increase in cost and a delay in the construction period.

According to a second aspect of the present invention, there is provided a wand form device for a tunnel excavator, wherein the water expansion seal extruding device is capable of inserting and holding a ring-shaped water expansion seal drilled at an end surface of the wand form end. A ring-shaped groove, and water inserted into the ring-shaped groove so as to be able to advance and retreat so as to form a water-swelling seal insertion groove in the concrete end face, and water inserted and retained in the ring-shaped groove in the water-swelling seal insertion groove. It has a ring-shaped plate for pushing out and inserting the expansion seal, and a plurality of jacks for moving the ring-shaped plate forward and backward. Forming the expansion seal insertion groove and reliably extruding and inserting the water expansion seal into the water expansion seal insertion groove,
The same operation and effect as those of the first aspect can be obtained by a reliable device having a simple structure.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an apparatus for extruding a water expansion seal of a wife formwork according to an embodiment of the present invention.

FIG. 2 is an operation state diagram.

FIG. 3 is a diagram showing a different operation state.

FIG. 4 is a side sectional view of a muddy shield excavator employing the same ECL.

FIG. 5 is an overall layout view of the wife formwork device, also viewed from the cutting blade side.

FIG. 6 is an overall layout view of the wife formwork device as viewed from the tail side.

FIG. 7 is an overall side sectional view of the wife form device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excavator main body 1a Skin plate 2 Partition wall 3 Cutter head 4 Copy cutter 5 Jack 6 Ring gear 7 Cutter turning motor 8 Drive gear 10 Chamber room 11 Agitator 12 Electric motor 13 Mud feeding pipe 14 Drainage pipe 15 Ring-shaped reinforcement part 16 Shield Jack 17 Wife form jack 18 Wife form 18a Ring groove 18b Guide hole 19 Inner form 20 Support member 21 Electa 22 Shape holding member 23 Feeder device 24 Demolding device 25 Wife form seal 26 Stainless steel packing 27 Stainless steel packing push-up Device 28 Stainless steel packing push-up jack 29 Concrete casting port 30 Water expansion seal 31 Water expansion seal extrusion device 32 Water expansion seal extrusion jack 33 Dead concrete extrusion device 34 Dead concrete extrusion jack 5 ring plate 36 connecting rod 37 the bracket 38 seal member 40 concrete 設用 pipe C concrete Ca water swelling seal insertion groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Yamada 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Inside the Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Hiroyuki Kawaguchi 1-chome, Shibaura, Minato-ku, Tokyo No. 2-3 Shimizu Corporation (72) Inventor Toshimitsu Aso 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Maho Watanabe 1-2-3, Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Kazuo Miyazawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Shinichi Nishimura 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D055 BB01 DA03 GC08 GC10 KB14

Claims (2)

[Claims] 1. An excavated tunnel wall is covered with an inner mold at a predetermined interval, and a space between the inner mold and the peripheral wall is closed with a ring-shaped end form. In a tunnel excavator in which concrete is directly poured into the space, a water expansion seal extrusion device for extruding a water expansion seal interposed at the joint of the concrete was assembled to the end form. A wife formwork device for a tunnel excavator. 2. The water-swelling seal pushing device includes a ring-shaped groove formed in an end face of the end mold frame and capable of inserting and holding a ring-shaped water-swelling seal, and is inserted into the ring-shaped groove so as to be able to advance and retreat. A ring-shaped plate for extruding and inserting a water-expandable seal inserted and held in the ring-shaped groove into the water-expandable seal-inserting groove, and 2. The wife formwork device for a tunnel excavator according to claim 1, comprising a plurality of jacks for moving the slab forward and backward.