JPH05239999A - Eliptical ring inversion device - Google Patents

Abstract

PURPOSE:To change the heading of a ring within a tunnel by installing a ring rotating means on a ring supporting means mounted on a moving table, and installing an inverting mechanism at a ring hanging/supporting means mounted on the table. CONSTITUTION:An existing eliptical ring 16B is held by the supporting part of a shaft supporting metal-piece 33 installed on a slide arch 41 through a ring rotating shaft 36. When the ring 16B is rotated round the axis of inversion CT, the ring 16B is rotated along with an inverting table 46, and locating is made so that the joining surface of the ring 16B is parallel with the joining surface 16Aa of an existing eliptical ring 16A. Then a supporting jack 45 for an inverting jack 42 is protruded and retreated in the directions of arrow C, D, and the inverted ring 16B is moved in the vertical direction. A slide jack 47 is protruded in the direction of arrow B, and a slide arch 41 is moved on a slide rail 49 toward the ring 16A. Further the arch 41 is moved, and the joining surface of the ring 16B is contacted with the joining surface 16Aa of the existing ring 16A, and joining takes place.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an elliptical ring reversal device used to construct an elliptical tunnel.

[0002]

2. Description of the Related Art Conventionally, when constructing a tunnel having an elliptical cross section, divided segments have been assembled into an elliptical ring within the tunnel. Recently, however, an elliptical ring with integrated segments has been used. A method of bringing it in and building it is proposed.

[0003]

However, in this case, when connecting the elliptical ring to the existing ring in the tunnel in which the elliptical ring is already constructed, it is necessary to change the direction so as to match the installed state of the existing ring. There is.

In view of the above circumstances, it is an object of the present invention to provide an elliptical ring reversing device which can change its direction so as to match the installed state of an existing ring.

[0005]

[Means for Solving the Problems] That is, the present invention has a support base (2B), and a movable base (41) is movably driven on the support base (2B) in a direction parallel to the tunnel construction direction. A ring support means (3) is provided on the movable table (41).
3a), and the ring supporting means (33a) is detachably provided with a ring rotating means (36) so that the elliptical ring (16) can rotate about the ring rotating means (36). A ring suspension support means (42) is provided on the movable table (41) so that an elliptical ring can be suspended and moved in the vertical direction, and an inversion mechanism (46) is suspended on the ring suspension support means (42). The elliptical ring in the state (16)
Is provided so as to be rotatable about a vertical axis (CT).

The numbers in parentheses are for convenience of showing the corresponding elements in the drawings, and the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

[0007]

With the above-mentioned structure, according to the present invention, the elliptical ring (16) is held in the horizontal direction by the ring supporting means (33a) through the ring rotating means (36). It acts as a rotating shaft. Further, by removing the ring rotating means (36) from the ring supporting means (33a), the elliptical ring (1
6) acts so as not to become an obstacle to the rotation around the vertical axis (CT). Furthermore, ring suspension support means (4
By hanging the elliptical ring (16) in 2),
It acts to move the elliptical ring (16) up and down. Further, by rotating the reversing mechanism (46) about the vertical axis (CT), the ring suspension supporting means (4)
An elliptical ring (16) suspended in 2) acts so as to rotate about a vertical axis (CT). Furthermore,
By driving and moving the movable table (41) in a direction parallel to the tunnel building direction, the elliptical ring (16) suspended by the ring suspension supporting means (42) moves in a direction parallel to the tunnel building direction. Acts like.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state where a horizontally long elliptical ring is attached to an elliptical ring reversing device which is an embodiment of the present invention and is about to be raised vertically.
The elliptical ring reversing device shown in FIG. 1 is used to raise the elliptical ring attached to the crane in a vertically long state and is suspended, and FIG. 3 shows the elliptical ring reversing device shown in FIG. FIG. 5 is a cross-sectional view showing a state where the suspended elliptical ring is rotated according to the tunnel cross-sectional shape, FIG. 4 is a cutaway perspective view showing the elliptical ring being loaded into the tunnel, and FIG. 1, a broken perspective view showing a state in which the suspended elliptical ring is rotated according to the tunnel cross-sectional shape by using the elliptical ring reversing device shown in FIG. 1 and then joined to the existing elliptical ring, FIG. , Figure 1
FIG. 7 is a cutaway plan view showing an embodiment of a tunnel excavating device equipped with the elliptical ring reversing device shown in FIG. 7, and FIG. 7 is a cutaway side view of the tunnel excavating device shown in FIG.

The dome type crane 40 according to the present invention is, as shown in FIG. 6, a rear trunk 2 of a tunnel excavation device 1 which will be described later.
As shown in FIG. 1, two linear slide rails 49, 49 provided on both sides of the rear trunk side wall are provided in parallel with each other inside the side wall portion of B, and the dome type crane 40 constructs a tunnel. Stretches in a direction parallel to the direction (perpendicular to the paper),
They are arranged in a line in the horizontal direction (left-right direction in the figure).
An arch-shaped slide arch 41 made of a steel plate or the like is provided on the slide rails 49, 49 so as to be movable parallel to the construction direction (the direction perpendicular to the paper surface).
At both ends of the sliding arch 41, the sliding portions 41a, 41
a is provided in contact with the slide rails 49, 49. The sliding portion 41a of the slide arch 41 is provided with a shaft support fitting 33 made of a steel plate or the like, and the support fitting 33 is provided with a support portion 33a made of a circular hole. The support portion 33a is provided so as to penetrate the shaft support fitting 33, and the ring rotation shaft 36 is detachably provided on the support portion 33a. The elliptical ring 16B for laying can be attached to the ring rotation shaft 36 via a ring raising jig 35 described later,
The elliptical ring 16B for laying is the ring rotating shaft 36
It is possible to rotate in the directions of arrows P and Q about the raising axis WT of the. In addition, the sliding portion 41 of the slide arch 41
As shown in FIG. 2, a pair of cylindrical rollers 48 are provided in each a, and each pair of cylindrical rollers 48 rotates on a slide rail 49, and each sliding portion 41a has a hydraulic jack or the like. The slide jack 47 composed of the
It is pivotally attached so as to project and retract in the B direction). The other end of the slide jack 47 is pivotally attached to the rear body 2 </ b> B such that the protruding / retracting direction of the slide jack 47 is parallel to the slide rail 49. Further, as shown in FIG. 1, a fixing hole 41b is provided at the top of the slide arch 41 so as to penetrate from the inner surface 41c of the slide arch 41 to the outside (direction of arrow C). A female screw adapted to the screw pitch of the support pin 43 described later is provided.

Further, as shown in FIG. 3, the dome type crane 40 is provided with a reversing jack 42 which is detachably provided on the slide arch 41. That is, the reversing jack 42
A support pin 43 made of a rod-shaped member is provided at both ends by threading, and a threaded portion (upper side in the figure) at one end of the support pin 43 is screwed into a fixing hole 41b of the slide arch 41. .. In addition, the support pin 43 has a reverse table 4
6 is provided so as to pass through the center of the reversing table 46 in the vertical direction in the figure, and the reversing table 4 having a semi-cylindrical shape.
6, the support portion 46b has an inner surface 16c of the elliptical ring 16.
It is provided in a shape having a cross section that is substantially similar to the shape. In the reversing table 46, the bearing portion 46a is in the horizontal direction (arrows R and S directions) with the center of the support pin 43 as the reversing axis CT.
It is rotatably provided on the lower side of the bearing portion 46a of the reversing table 46 in the drawing. It is provided so that 43 passes through. The support jack 45 is provided so as to project and retract in the vertical direction (directions of arrows C and D). Below the support jack 45 in the drawing, a fixed nut 44 such as a nut is provided with a reversing table 46 and a support jack 45. It is provided by being screwed onto the support pin 43 so as not to fall off from the support pin 43. That is, the support pin 43 is screwed into the fixing hole 41b of the slide arch 41, and the support pin 43 is provided with the reversing table 46, the support jack 45, and the fixing nut 44 in this order in the downward direction in the drawing.

By the way, the elliptical ring 16B for installation is
As shown in FIG. 4, the carrier is mounted on the carrier vehicle 52 and carried in. As shown in FIG. 1, the ring raising jack 34 including an air mat type jack is detached from the mounting surface 52 a of the carrier vehicle 52 as shown in FIG. 1. It is provided freely. The other surface of the ring raising jack 34 is in contact with the outer surface 16Bd of the laying elliptical ring 16B, and the ring raising jack 34 is provided so as to project and retreat in the vertical direction (directions of arrows C and D). That is, the laying elliptical ring 16B is mounted on the carrier truck 52 and carried in so as to be placed on the ring raising jack 34.

Further, as shown in FIG. 2, an inversion hole 18 is provided at one end of the laying elliptical ring 16B in the major axis direction so as to penetrate from the inner surface 16Bc of the laying elliptical ring 16B to the outside. The reversing hole 18 is provided at the top (in the direction of arrow C) of the laying elliptical ring 16B in the upper part of the drawing. The short axis direction of the elliptical ring 16B for installation (arrow A,
(B direction) On both sides, raised holes 17, 17 are provided so as to penetrate from the inner surface 16Bc of the laying elliptical ring 16B to the outside, and the raising holes 17, 17 are the center of gravity GC of the laying elliptical ring 16B. It is provided on the line segment that passes through. Further, the raising holes 17 and 17 are provided with female threads that match the screw pitch of a jig fixing pin 37, which will be described later. Furthermore, the laying elliptical ring 16B has a ring raising jig 35 on the X-shaped side surface. Is provided. The ring raising jig 35 includes bases 35a, 35a made of steel plate or the like.
Is provided, and the bases 35a, 35a are provided with a horizontally long portion (arrow C, arrow C,) of the inner surface 16Bc of the laying elliptical ring 16B.
They are provided so as to contact each other in the D direction). Also,
The base 35a is provided with a hole through which the jig stop pin 37 made of a bolt or the like passes, so as to pass through the base 35a, and one base 35a has cylindrical columns 35b and 35b. Are provided from both ends (vertical direction in the figure) toward the center of gravity GC of the elliptical ring 16B for installation. That is, the bases 35a on both the left and right sides in the figure,
Struts 35b, 35b, 35b, 35b extending from 35a
Are provided so as to form an X-shaped side surface with the center of gravity GC as a virtual intersection. Also, the columns 35b, 35b, 35
At a virtual intersection, which is the other end of b and 35b, a sliding portion 35c formed of a cylindrical bearing or the like is provided with the rotation axis in the direction perpendicular to the paper surface, and the sliding portion 35c has a cylindrical shape. The ring rotation shaft 36 is detachably provided. The ring rotation shaft 36 is extendable and fixable in the axial direction of the ring rotation shaft 36, and is rotatably provided with the direction perpendicular to the plane of the drawing as a rotation axis, and between the columns 35b and 35b as shown in FIG. A reinforcing member 35d made of a steel rod or the like is provided. That is, the ring raising jig 35 with respect to the laying elliptical ring 16B is such that the bases 35a, 35a of the ring raising jig 35 are in contact with the inner surface 16Bc of the horizontally long portion of the laying elliptical ring 16B. ,
The jig fixing pins 37 and 37 are screwed into the raising holes 17 and 17 of the laying elliptical ring 16B while sandwiching 35a. Then, the sliding portion 35 is attached to the center of gravity GC of the laying elliptical ring 16B.
Since the center of c is located, when the ring rotation shaft 36 is inserted into the sliding portion 35c, the laying elliptical ring 16B rotates about the center of gravity GC.

By the way, a tunnel excavation device 1 equipped with a dome type crane 40 according to the present invention has a shell-shaped outer shell 2 as shown in FIGS. 6 and 7.
The outer shell 2 is composed of a front body 2A and a rear body 2B which are connected to each other so as to be able to move back and forth in the excavation direction, that is, the directions of arrows A and B. That is, as shown in FIG. 7, a relay cylinder 2C is formed at the front end of the rear body 2B so as to enter the rear end of the front body 2A, and the rear body 2B is formed along the inner circumference thereof. A plurality of outer shell jacks 2D are provided. Then, by pushing and driving the outer shell jack 2D, the rear body 2B can move forward in the direction of the arrow A by the pitch of the outer shell jack 2D so as to take a reaction force to the constructed tunnel 25. Also, an invert 25b is provided below the front body 2A and the rear body 2B.
However, the rock mass is formed by exposing the ground 20 to the ground, and the invert 25b is continuously formed in the form of extending from the face 20a toward the rear of the tunnel, that is, from the arrow A direction to the arrow B direction. ing. The front body 2A is formed in a bottomless shape so as to open toward the invert 25b, and the rear body 2B is formed with a bottom portion 2B ₁ on the lower side so as to be shielded from the invert 25b. ing. Outer shell legs 3 are provided on the left and right inner side surfaces of the front body 2A and the rear body 2B,
The outer shell jacks 3 provided on the rear torso 2B are arranged at the bottom of the rear torso 2B so that they can be raised and lowered so as to project downward from the lower end portions of the front torso 2A and the rear torso 2B. It penetrates 2B ₁ . Each outer shell leg 3 is supported by the invert 25b, and a leg jack 3A is mounted on the outer shell leg 3 to move the front torso 2A and the rear torso 2B up and down.
That is, it is provided so as to be movably supported in the directions of arrows C and D.

At the front end portion of the front body 2A, a front bearing sheet pile 5 for temporarily supporting the arch portion of the face 20a is provided.
A plurality of them are provided along the inner circumference of the above so as to project and retract by hydraulic jacks or the like in the directions of arrows A and B, and an excavator 6 is installed inside the front body 2A. The excavator 6 has a machine body 6a, and as shown in FIG. 7, a hydraulic unit 6 for operating and driving the excavator 6 is provided at the rear of the machine body 6a.
1, a control panel 62, etc. are built in. To the rear of the machine body 6a, a toggle jack 13 is appropriately selected and provided in a form corresponding to the weight to be supported and pressed. A known slide shoe mechanism 7 for propelling the machine body 6a in the direction of arrow A is provided at the bottom of the machine body 6a. The slide shoe mechanism 7 is composed of a fixed shoe 7A, a drive shoe 7B, a slide jack 7C, and the like. Has been done. The fixed shoe 7A is formed in a ski shape so as to support the machine body 6a, and the fixed shoe 7A has an arrow A with respect to the machine body 6a.
It is connected so that it does not move in the B direction. Further, the drive shoe 7B is formed in a ski shape like the fixed shoe 7A, and the drive shoe 7B is configured to be able to move in advance in the arrow A direction with respect to the machine body 6a via the slide jack 7C. There is. A cutter head 9 is provided at the front end of the machine body 6a.
Is provided so as to be swingable in the directions of arrows C and D and the directions of arrows E and F in FIG. Has a cutting blade 9a having a truncated cone shape capable of crushing and excavating rocks such as the ground 20. As shown in FIG. 7, a screw blade 9c is provided on the outer periphery of the cutter head shaft portion 9b so as to convey the shear, that is, the rock of the cutting face 20a crushed by the cutting blade 9a to the rear in the arrow B direction. In addition, a gathering ring 10 for slip recovery is provided behind the screw blade 9c so as to be attached to the base portion of the cutter head shaft portion 9b. The scrap collected by the gathering 10 is transferred to the conveyor 11 provided on the side of the machine body 6a.
Further, it is conveyed to the rear through the, and is carried out of the tunnel 25 by a suitable shearing conveying means.

By the way, on the upper part of the machine body 6a, two canopy jacks 12, 12 arranged in the directions of arrows A and B are arranged.
However, the cylinders 12a are mounted in a lined manner, and the front body 2 is attached to the upper portion of each canopy jack 12.
A canopy 12b formed in the shape of a kamaboko along the inner peripheral surface of the canopy portion of A has arrows C and D through a cylinder 12a.
It is provided so that it can be moved and driven in the vertical direction, which is the direction. Further, as shown in FIG. 6, side jacks 15 and 15 are provided on both sides of the machine body 6a in the directions of arrows E and F, respectively.
It is mounted in such a manner that a is supported on the inner surface of the front body 2A, that is, the machine body 6a and the front body 2A are connected to the inner circumferential direction of the tunnel through the canopy jacks 12 and 12 and the side jacks 15 and 15. It is configured so that it can be joined and separated.

Now, as shown in FIG. 7, the rear body 2B
A plurality of elliptic ring-shaped elliptical rings 16 that have been lined up by the erector 30 are connected to the rear of the so as to line up in the directions of arrows A and B without a gap.
Between 6 and 16, a water stop plate, a fastening bolt and the like are appropriately constructed in such a manner that the plurality of connected elliptical rings 16 are densely integrated. The elliptical ring 16 that has already been lined up by the erector 30 and is structurally integrated is the most distal portion in the construction direction, that is, the existing elliptical ring 16A that is constructed on the left side in the figure is inside the rear torso 2B. It is arranged so as to enter from the rear (right side in the figure). In order to join the already constructed existing elliptical ring 16A and a newly constructed elliptical ring 16B to the lower end portion in the arrow A direction of the already constructed already elliptical ring 16A arranged at the most distal end portion. The segment support means 29 is provided so as to be fixed to the bottom portion 2B ₁ . The backfill layer 21 is formed on the outer side in the circumferential direction of the elliptical ring 16 in such a manner that the ground 20 is excavated in a horseshoe-shaped cross section so that a gap is formed between the rock 20 and the elliptical ring 16 having the oval cross section. The backfill layer 21 is filled with mortar 22 and the like via the grout pump 23 and the like. Therefore, assuming that the lining has been completed by the hardening of the mortar 22, the tunnel 25 that has already been lined is connected to the rear of the rear body 2B. Moreover, between the outer shell 2 and the natural ground 20 in such a manner that the overburden is unavoidably formed in the natural ground 20 excavated by the excavator 6 between the lining tunnel 25 and the face 20a. To the temporary void 2
1'is generated, and the temporary void 21 'is filled with the primary backing material 26 such as sand and foam polystyrene beads.

Since the present invention has the above configuration,
When constructing a tunnel, first, the rock excavation device 1 is used to excavate rocky ground 20. That is, the receiving sheet pile 5
Thus, the rock of the face 20a is supported so as not to fall, and the leg jack 3A is projected to push the outer shell 2 through the outer shell leg 3 in the direction of arrow C to support the natural ground 20. Further, the canopy jack 12 is pressed and loaded, and the ram 12c is pushed out in the direction of the arrow C to push the canopy 12b against the canopy portion of the front body 2A. Further, the side jacks 15 and 15 are loaded under pressure to the rams 15c and 15c.
Is pushed out in the directions of arrows E and F to integrate the machine body 6a with the front body 2A. Then, the fuselage 6a has a front body 2A.
Since it is supported by the surface pressure of the entire peripheral surface of the machine body 6, the machine body 6a is firmly fixed and supported so as not to move in the front body 2A sufficiently against excavation resistance and vibration generated in the cutter head 9. It In this way, when the machine body 6a is firmly supported by the front body 2A, the rock is crushed by driving the excavator 6 so that the cutting blade 9A abuts on the cutting face 20a, and the cutter head 9 is moved to the arrows C and D. , E, F by rotating while swinging, the excavation machine 6 is advanced in the direction of arrow A by the excavation stroke of the excavator 6 so that the excavation cross-section has a horseshoe shape. At the same time as or before the face 20a is excavated, the primary backing material 26 is pressure-fed into the temporary gap 21 '.
It is filled in such a manner that it is injected from the portion of the arch 25a through 7 with an appropriate pressure. As a result, the primary backing material 26 allows the deformation of the natural ground 20 to some extent while preventing skin from falling off from the overburdened portion, and also exerts a stress acting outward from the outer shell 2 along the outer peripheral surface. , 2 through the primary backing material 26
It plays the role of supporting 0 dispersedly.

Next, the drive shoe 7B is driven by driving the slide jack 7C under the pressure load condition of the canopy jacks 12, 12 and the side jacks 15, 15.
The machine body 6a is preceded by a moving stroke in the direction of arrow A. Then, the pressure of the leg jack 3A is released, the outer shell leg 3 is contracted, and the outer shell leg 3 is inverted 25.
The canopy jacks 12 and 1 are lifted from b.
2 is released from the pressure to lower the front body 2A together with the canopies 12b and 12b in the direction of arrow D with the canopy portion of the front body 2A separated from the primary backing material 26. In this way, front body 2A
The machine body 6a carrying and supporting is moved in the direction of arrow A in such a manner that the fixed shoe 7A follows the drive shoe 7B that precedes the moving stroke. Next, when the front torso 2A and the fuselage 6a move forward, the rear torso 2B is left behind without advancing, and the relay torso 2C exits from the rear end of the front torso 2A in a state of retreating from the front torso 2A. ing. Then the face 2a
Is moved forward, and when the ground 20 of the newly cut open portion is appropriately stabilized, by driving the outer shell jack 2D, the rear trunk 2B is moved in the direction of arrow A by the drive stroke of the outer shell jack 2D. Let

In this way, when the rear body 2B is advanced in the excavation direction by the driving stroke of the outer shell jack 2D, the existing elliptic ring located at the most distal end of the constructed elliptical ring 16, that is, the end portion in the direction of arrow A. A gap is formed between the ring 16A and the rear end of the rear body 2B, that is, between the end portions in the arrow B direction, by the amount of advance of the rear body 2B. Therefore, as the rear torso 2B moves forward,
Alternatively, as shown in FIG. 4, the elliptical ring 16B for installation is mounted on the carrier truck 52 in a horizontally elongated state from the outside of the tunnel 25 as shown in FIG. It travels on the rail 51 laid on the vehicle and is brought into the rear body 2B. At the time of carrying-in, as shown in FIG.
It is placed on the ring raising jack 32 provided on the second mounting surface 52a. At this time, by retracting the ring raising jack 32 in the direction of the arrow D, the laying elliptical ring 16B is not brought into contact with the inner surface 16c of the built-in elliptical ring 16 of the tunnel 25. Make sure that it does not interfere with the loading of the ring 16B. Further, although the ring-raising jig 16 is mounted on the laid elliptical ring 16B (indicated by a solid line in FIG. 1) which is horizontally long, the jig 35 has a ring-raising jig 35 on the inner surface 16Bc of the laterally long portion of the ring. The bases 35a, 35a are mounted so that they are in contact with each other. Then, the base 35 of the ring raising jig 35
a and 35a are sandwiched by the jig fixing pins 37 and 37 from the inside of the laying elliptical ring 16B, the jig fixing pin 37
Is screwed into the raising holes 17, 17 of the laying elliptical ring 16B, so that the laying elliptical ring 1B is laid on the laying elliptical ring 16B in which the ring raising jig 35 is laid horizontally.
It is provided so that the center of the sliding portion 35c is located at the center of gravity GC of 6B.

Next, the carrier truck 52 equipped with the laying elliptical ring 16B is attached to the dome type crane 40.
The slide arch 41 is stopped in front of the dome type crane 40 so as to be positioned within the movable range of the slide arch 41. And FIG.
As shown in FIG. 5, the ring rotation shaft 36 is extended and inserted into the sliding portion 35C of the ring raising jig 35, and then the ring raising jack 32 is projected in the direction of arrow C to lay down the oval ring 16B for installation in the horizontally long state. Is moved in the direction of arrow C. The rotation axis of the ring rotation shaft 36 is set to the support portion 33a of the shaft support fitting 33 of the slide arch 41.
Match the height of the rotation axis (direction of arrow C). Next, as shown in FIG. 2, the slide jack 47 of the dome type crane 40 is appropriately projected and retracted in the directions of the arrows A and B, and the slide arch 41 is moved on the slide rail 49. Shaft support bracket 3
3, the ring rotating shaft 36 of the ring raising jack 32 is aligned with the supporting portion 33a of the shaft 3 and the shaft 3
6 is further extended and inserted into the support portion 33a. As a result, the laying elliptical ring 16B is supported by the support portion 33a of the shaft support fitting 33 of the dome crane 40. Further, as shown in FIG. 1, in the reversing jack 42 of the dome type crane 40, the support pin 43 screwed into the fixing hole 41b of the slide arch 41 is loosened and removed, and the oval ring 16B for installation is vertically elongated. Make sure you don't get in the way when you wake it up. Next, when the insertion of the ring rotation shaft 36 into the support portion 33a of the shaft support fitting 33 is completed, the ring raising jack 32 is moved to the direction indicated by the arrow D.
The outer surface 16 of the elliptical ring 16B for laying
The contact between Bd and the ring raising jack 32 is released. Then, since the laying elliptical ring 16B can be separated from the carrier truck 52, the carrier truck 52 is moved at least from the inside of the rear body 2B after the separation, and the temporary rail 50 in the rear body 2B is removed to remove the laying ellipse. Be careful not to obstruct the work of reversing the mold ring 16B. Next, in this state, as shown in FIG. 1, the laying elliptical ring 16B is rotated in the direction of arrow P about the ring rotation shaft 36 by hand or the like. Then, the state shown by the alternate long and short dash line in FIG. 1 is obtained.

Next, as shown in FIG. 2, the reversing hole 18 located at the top of the elliptical ring 16B for laying is reversed.
The slide arch 41 is held so as to be positioned in the upper direction in the figure with the penetrating direction of which is oriented in the vertical direction (arrow C and D directions).
Positioning is performed so that the penetration direction of the fixing hole 41b located at the top of the above-mentioned is aligned with the penetration direction of the reversing hole 18 located at the top of the installation elliptical ring 16B. Next, the fixing hole 41b
After the positioning of the reversing hole 18 is completed, the reversing jack 42 that has been removed is attached to the slide arch 41.
That is, the support pin 43 of the reversing jack 42 is inserted into the reversing hole 18 from the inner surface 16Bc side of the laying elliptical ring 16B and screwed into the fixing hole 41b of the slide arch 41. At this time, the support pin 43 is screwed in until the reversal table 46 of the reversal jack 42 contacts the inner surface 16Bc of the laying elliptical ring 16B. Next, when the attachment of the reversing jack 42 is completed, the ring rotating shaft 36 is contracted to attach the ring rotating shaft 36 from the support portion 33a of the shaft support fitting 33 of the slide arch 41 to the ring raising jig 35 of the elliptical ring 16B for installation. The rotating shaft 36 is removed. As a result, the laying elliptical ring 16B is supported by the reversing jack 42 of the dome type crane 40. Further, the pins 37, 37 are removed, and the ring raising jig 35 attached to the laying elliptical ring 16B is removed.

Next, as shown in FIG. 3, the laying elliptical ring 16B is rotated in the arrow S direction (or the arrow R direction) about the reversal axis CT, whereby Since it rotates in the arrow S direction (or arrow R direction) together with the reversing table 46 via the bearing portion 46a, by appropriately rotating it, the joint surface 16Bb of the laying elliptical ring 16B becomes as shown in FIG. , And is positioned so as to be parallel to the joint surface 16Aa of the existing elliptical ring 16A. Next, when the positioning is completed, in that state, as shown in FIG.
By projecting and retracting the support jacks 45 in the directions of arrows C and D, the inverted installation elliptical ring 16B is moved in the vertical direction (directions of arrows C and D). Therefore, the support jack 45 is appropriately projected and retracted to vertically position the inverted installation elliptical ring 16B with respect to the installation ring 16A. Then, when the vertical positioning of the laying elliptical ring 16B is completed, in that state, the slide jack 47 is projected in the direction of the arrow B as shown in FIG. The slide arch 41 to which the supported reversing jack 42 is attached is moved in the arrow B direction on the slide rail 49 toward the existing elliptical ring 16A. Therefore, by appropriately projecting the slide jack 47, the slide arch 41 is moved in the direction of the existing elliptical ring 16A, and the joining surface 1 of the laying elliptical ring 16B.
6Bb is bonded to the bonding surface 16Aa of the existing elliptical ring 16A. This completes the work of joining the laying elliptical ring 16B to the existing elliptical ring 16A. When the joining work is completed, the support jack 45 is removed from the slide arch 41, and the arch 41 is retracted in the arrow direction. As described above, by using the dome type crane 40, when the laying elliptical ring 16B is connected to the existing elliptical ring 16A in the constructed tunnel 25, the laying elliptical ring 16B is in a horizontally long loading state. It can be raised from portrait to portrait. In addition, the laid elliptical ring 16B that is vertically elongated can be inverted and joined so as to match the laid state of the existing elliptical ring 16A. Also,
Since the elliptical ring 16 is already formed in the shape of an ellipse, it is not necessary to assemble the segment pieces divided in the circumferential direction of the tunnel into an annular shape. The elliptical rings 16 and 16 can be easily connected only by aligning the end faces of the existing elliptical rings 16A that have been set up.

Thus, the cutting face 20 is cut by the cutter head 9.
While advancing a, the front body 2A and the rear body 2B are sequentially advanced, and at the same time, the injection and filling work of the primary backing material 26 and the mortar 22 and the standing work of the elliptical ring 16 are sequentially repeated under appropriate steps. By doing so, it becomes possible to complete the lining construction at the same time as the excavation work in the outer shell 2 without having to separately assemble a steel support and a formwork for secondary winding concrete in the tunnel 25. Therefore, it goes without saying that the construction time required for constructing the tunnel 25 is short, and the excavation work is performed under the condition that the outer shell 2 always secures the stability of the ground 20 of the face 20a, and By the fact that the primary backfilling work is performed at the same time as the excavation,
The internal stress of the ground material 20 to be cut open is not disturbed. Therefore, the tunnel 25 constructed as described above
Can secure the safety during construction and can exhibit a stable structural state even after the construction.

[0024]

As described above, according to the present invention, the rear body 2
A support base such as B is provided, and a movable base such as a slide arch 41 is provided on the support base so as to be movable and driven in a direction parallel to the tunnel building direction. The movable base is provided with support portions 33a, 33.
A ring supporting means such as a is provided, and the ring supporting means is
A ring rotating means such as a ring rotating shaft 36 is detachably provided so that the elliptical ring 16 can rotate about the ring rotating means, and a ring suspension supporting means such as a reversing jack 42 is attached to the moving table. An oval ring is provided so that it can be suspended and moved in the vertical direction, and the ring suspension support means is
A reversing mechanism such as a reversing table 46 is provided so that the elliptical ring 16 in a suspended state can be rotatably supported around a vertical axis such as a reversing axis CT.

With the above structure, the elliptical ring 16 can be rotated about the horizontal axis by holding the elliptical ring 16 by the ring supporting means via the ring rotating means, so that the tunnel can rotate. The laying elliptical ring 16B carried in can be raised in a vertically long state. Also, after raising the elliptical ring 16, by removing the ring rotating means from the ring supporting means,
The oval ring 16 can be inverted as it does not interfere with the rotation of the oval ring 16 about the vertical axis. Further, since the elliptical ring 16 can be moved in the vertical direction by suspending the elliptical ring 16 with the ring suspension supporting means, it is possible to move the elliptical ring 16B carried into the tunnel and supported by the ring suspension supporting means. Vertical positioning is possible. Further, by rotating the reversing mechanism about the vertical axis, the elliptical ring 16 suspended by the ring suspension supporting means can be rotated about the vertical axis. The laying elliptical ring 16B supported by the supporting means can be oriented in the tunnel building direction. Further, by driving and moving the movable table in a direction parallel to the tunnel building direction, the elliptical ring 16 suspended by the ring suspension supporting means moves in a direction parallel to the tunnel building direction, so that it is carried into the tunnel. The installed elliptical ring 16B is replaced with the existing elliptical ring 16B.
Can be joined to A.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a horizontally long elliptical ring is attached to an elliptical ring reversing device according to an embodiment of the present invention and is about to be raised vertically.

FIG. 2 is a cutaway side view showing a state in which the elliptical ring reversing device shown in FIG. 1 is used to raise the elliptical ring in a vertically long state and suspend it.

FIG. 3 is a cross-sectional view showing a state where the suspended elliptical ring is rotated according to the tunnel cross-sectional shape by using the elliptical ring reversing device shown in FIG. 1.

FIG. 4 is a cutaway perspective view showing a state where an elliptical ring is mounted and being carried into a tunnel.

FIG. 5 shows a state where the suspended elliptical ring is rotated according to the tunnel cross-sectional shape by using the elliptical ring reversing device shown in FIG. 1 and then joined to the existing elliptical ring. FIG.

6 is a cutaway plan view showing an embodiment of a tunnel excavation device equipped with the elliptical ring inversion device shown in FIG. 1. FIG.

7 is a cutaway side view of the tunnel boring device shown in FIG. 6;

[Explanation of symbols]

 2B: Support base (rear body) 16: Elliptical ring 33a: Ring support means (support portion) 36: Ring rotation means (ring rotation shaft) 41: Moving base (slide arch) 42: Ring suspension Lower support means (reversal jack) 46 …… Reversal mechanism (reversal table) 52 …… Carriage (transportation carriage) CT …… Vertical axis (reversal axis)

Claims (1)

[Claims] 1. A support base is provided, a movable base is provided on the support base so as to be movable and driven in a direction parallel to a tunnel building direction, a ring support means is provided on the movable base, and the ring support means is provided. The ring rotating means is detachably provided so that the elliptical ring can rotate about the ring rotating means, and the ring suspension supporting means is vertically movable on the moving base so that the elliptical ring can be suspended and moved. An elliptic ring reversing device, wherein the ring suspension supporting means is provided with a reversing mechanism so that the elliptical ring in a suspended state can be supported rotatably about a vertical axis.