JP2576963B2 - Tunnel restoration method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel restoration method used for restoring a tunnel to be restored, such as an aged water tunnel.

[0002]

2. Description of the Related Art Conventionally, in a canal tunnel or the like that has been affected by a disaster or has been aged for many years (hereinafter referred to as an aged tunnel), lining concrete has peeled off or collapsed in an uncovered construction part. Has occurred. In order to recover such an aging tunnel, the lining of the aging tunnel must be demolished and excavated to create a new tunnel with a larger diameter than the aging tunnel. The building was constructed by spraying new concrete on the inner surface and casting it.

[0003]

However, by demolishing the lining of the aging tunnel or placing new concrete, the aging tunnel is kept until the concrete solidifies and a new tunnel is constructed. In addition to the construction of a new tunnel, in addition to the construction of a new tunnel, the construction of the alternative tunnel will prolong the construction of the tunnel if it is not convenient and it is very inconvenient. In addition, it leads to mass consumption of materials and energy, which is not preferable. Demolishing the lining of the aged tunnel or excavating the tunnel excessively also causes a long construction of a new tunnel and a large consumption of materials and energy. In addition, the diameter of the waterway tunnel was small, and the restoration work was performed in a narrow space, resulting in poor work efficiency.

In view of the above circumstances, an object of the present invention is to provide a tunnel restoration method capable of efficiently constructing a new tunnel while using a waterway tunnel to be restored.

[0005]

That is, the present invention provides a first step of stopping the discharge into the waterway tunnel in the waterway tunnel to be restored (85), and an annular shape corresponding to the cross-sectional shape of the waterway tunnel. Oval ring (7
6, 76A, 76B) into the waterway tunnel and build along the waterway tunnel into a part of the entire length of the waterway tunnel, and a third step of resuming discharge into the waterway tunnel These first, second and third steps are sequentially repeated to extend over the entire length of the waterway tunnel,
The elliptical ring is configured to be built in the waterway tunnel.

[0006] The numbers in parentheses and the like are for convenience showing the corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0007]

According to the above-described structure, the present invention has an effect that the elliptical ring (76, 76A, 76B) is formed in an annular shape so that the elliptical ring can be built only by inverting and joining in the waterway tunnel. I do. Also, it works so that water can flow immediately after the oval ring is built. Further, by repeatedly stopping the discharge to the tunnel (85) to be restored and resuming the discharge, it works to secure the working time in the waterway tunnel. Further, the oval rings (76, 76A, 76B) are formed in an annular shape corresponding to the cross-sectional shape of the waterway tunnel (85) to be restored, so that a decrease in water flow capacity of the tunnel after restoration is minimized. It works to be able to.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cutaway perspective view of a transport reversing device applied to the present invention, and FIG. 2 is a perspective view showing the movement of the transport reversing device shown in FIG. 1. FIG. It is a figure showing the place where it was made to stand upright in a portrait state. (B) is a figure which shows the place where the upright elliptical ring was rotated so as to match the laying state of the existing elliptical ring. FIG. 3 is a plan view of the reversing device of the transport reversing device shown in FIG. 1, and FIG.
3 is a side view of the reversing device shown in FIG. 3, FIG. 5 is a front view of the reversing device shown in FIG. 3, FIG. 6 is a schematic diagram of an upright rotation mechanism of the reversing device shown in FIG. FIG. 8 is a detailed view of a fitting portion where the carriage of the transport reversing device shown in FIG. 1 fits into the reversing device. FIG. 8 shows the laying of the laying elliptic ring carried by the transport reversing device shown in FIG. It is a figure which shows the procedure of reverse joining so that it may match a state, (a) is
It is a figure which shows the place where the elliptical ring for installation was mounted in the conveyance reversing device. (B) is a figure which shows the place where the laying elliptical ring in a horizontal state was set up in the vertical state.
(C) is a figure which shows the place where the upright elliptical ring was rotated so as to match the laying state of the existing elliptical ring. (D) is a figure which shows the place where the elliptical ring for installation was joined to the existing elliptical ring. FIG. 9 is a cross-sectional view showing a place where a drain is provided outside the tunnel, and FIG.
It is sectional drawing which shows the shape of the end surface of an elliptical ring, (a)
FIG. 2 is a sectional view of an end face of the elliptical ring shown in FIG. 1.
(B) is sectional drawing which shows the end surface of another shape.

As shown in FIG. 1, the transport reversing device 20 applied to the present invention comprises a first transport vehicle 21A and a second transport vehicle 21B, and a reversing device 30. That is, the first and second transport carts 21A and 21B have block-shaped main bodies 22A and 22B, respectively.
Traveling wheels 23 that can travel on the ground or the like are provided at the lower four corners of A and 22B so as to support the main bodies 22A and 22B. The traveling wheels 23 are provided in such a manner that at least a pair of traveling wheels 23 of the front wheels or the rear wheels of the traveling wheels 23 can be rotationally driven by a driving device (not shown). That is, the first and second transport carts 21A and 21B are
On the invert 85b of the aging tunnel 85 described later,
The vehicle can run on the inner surface 76d of an elliptical ring 76 built inside the tunnel 85 in a self-propelled manner.

In addition, above the main bodies 22A and 22B,
As shown in FIG. 1, centering jacks 50A and 50B each composed of a hydraulic jack or the like are provided so as to protrude and retreat in the vertical direction (the directions of arrows K and L), and the rods of the centering jacks 50A and 50B are provided. Rams 52A and 52B are provided at the tips of 51A and 51B, respectively. Each ram 52A, 52B has a bracket 25A,
25B, and each bracket 25A, 25B
Are provided on the first and second carriages 21A, 21B sides (arrows A, B) facing the crank arms 26A, 26B, respectively.
Direction) and the crank arms 26A,
6B is arranged in such a manner that it cannot come into contact with the vehicle such as intersection, collision and the like.
The coupling part 26 which is one end of the crank arms 26A, 26B
Ac and 26Bc are provided so that the crank arms 26A and 26B can swing in directions indicated by arrows C and D, respectively.
5B, while the crank arms 26A,
As shown in FIG. 7, wedge-shaped fitting portions 26Aa and 26Ba are formed at the other end of 26B. Fitting part 26A
7a and 26Ba are provided with fixing holes 26Ab and 26Bb so as to penetrate the fitting portions 26Aa and 26Ba from the tapered surface to the tapered surface in the vertical direction in FIG.

On the other hand, as shown in FIG. 1, the reversing device 30 comprises a standing device 30A and a supporting device 30B. That is, the upright device 30A has stepped column-shaped inverted support arms 31A and 31B, and the inverted support arms 31A and 31B are provided with a cylindrical rotating drum 32 that points the rotating drum 32 in the directions of arrows R and S. It is provided so that it can rotate. That is, as shown in FIG. 6, both ends of the rotating drum 32 are supported by reversing support arms 31A and 31B via bearings 33A and 33B.
Can rotate in the directions of arrows R and S about a vertical standing axis CT1 (that is, an axis in the directions of arrows E and F) that is perpendicular to the tunnel construction direction, that is, the traveling direction (the directions of arrows A and B). The rotary drum 32 is provided with a rotation transmission hole 32a formed by cutting a spline or the like so as to be aligned with the upright axis CT1, and one of the reversing support arms 31A is rotatably driven by a hydraulic motor or the like. An upright motor 35 is provided on the mounting surface 31Ac so that the rotation axis is aligned with the upright axis CT1. The upright motor 35 is engaged with a rotation transmission hole 32 a of the rotary drum 32 via a gear 36. The maximum width X of the upright device 30A is, as shown in FIG.
The maximum width X is a length of a line segment connecting both ends of the reversing support arms 31A and 31B diagonally, and the maximum width X is smaller than the inner diameter D1 on the short axis side of the elliptical ring 76 shown in FIG. Is set to

As shown in FIGS. 3 and 4, support holes 31Aa and 31Ba, which are wedge-shaped holes, are provided in the inverted support arms 31A and 31B, respectively, so as to penetrate in the directions of arrows A and B in the drawings. Support holes 31Aa, 31A
Ba is a fitting portion 26Aa, 26Ba of each of the crank arms 26A, 26B of the first and second carriages 21A, 21B.
Are the insertion holes 31Aaaa, 3 of the support holes 31Aa, 31Ba.
It is formed in a form that can be fitted from 1Baa. Further, as shown in FIG. 5, the reversing support arms 31A and 31B have
The fixing holes 31Ab and 31Bb respectively correspond to the support holes 31A.
a, 31Ba are provided so as to penetrate in the vertical direction in the figure, and the fixing holes 31Ab, 31Bb are provided when the fitting portions 26Aa, 26Ba of the crank arms 26A, 26B are fitted into the support holes 31Aa, 31Ba. The fixing hole 26A
b, 26Bb. Further, on the outer peripheral surfaces of the reversing support arms 31A and 31B, FIG.
As shown in FIG. 5 and FIG.
9 is an insertion hole 31Aaaa of the support hole 31Aa, 31Ba,
When the 31Baa are arranged alternately, they are provided vertically above (in the direction of arrow C).

Accordingly, in order to connect the upright device 30A to the first and second transport vehicles 21A and 21B, as shown in FIGS. 1, 4 and 5, the first and second transport vehicles 21A and 21B are connected.
The upright device 30A is arranged between the crank arms 26A and 26B of B. The support holes 31A of the reversing support arms 31A and 31B located at both ends of the erecting device 30A.
a, 31Ba are fitted with the fitting portions 26Aa, 26Ba of the crank arms 26A, 26B, respectively.
6Ba fixing holes 26Ab, 26Bb and reversal support arm 3
The fixing holes 31Ab and 31Bb of 1A and 31B are fitted so as to communicate with each other. Further, the fixing pins 27, 27 are connected to the fixing holes 31Ab, 31Bb and the fixing holes 26Ab, 26B.
b, the reversing support arms 31A, 31B are inserted into the first and second transport carts 21A, 21B.
Fixed against. Therefore, the reversing support arm 31
With the A, 31B fixed, the upright motor 35 is driven to rotate in the directions of the arrows R, S, so that the rotating drum 3
2 rotates in the directions of arrows R and S.

A supporting device 30B is provided on the rotating drum 32 of the upright device 30A along a reversing axis CT2 orthogonal to the upright axis CT1. That is, the erecting device 3
As shown in FIGS. 3 and 4, a rod-shaped projecting arm 37 constituting the support device 30B
A and 37B are provided so as to extend along the reversing axis CT2 (in the horizontal direction in the figure) with the rotary drum 32 interposed therebetween, and one end of the projecting arm 37A is formed of a hydraulic jack or the like. The support jack 41 is provided so as to protrude and retreat in a direction along the reversing axis CT2 (directions of arrows G and H). The stroke L4 at which the support jack 41 can protrude and retreat is set so as to change the elliptical ring support length D2 corresponding to the inner diameter of the elliptical ring 76 on the long axis side. A ram 43 is provided at the tip of the rod 42 of the support jack 41. The ram 43 is provided with a disc-shaped reversing table 46A via a bearing 49A about the reversing axis CT2 in the directions of arrows P and Q. It is provided so that it can rotate. The reversing table 46A is provided with a joining surface 46Aa substantially matching the curved surface of the inner surface 76d of the elliptical ring 76.
Of the elliptical ring 76 has a convex fitting pin 47A which can be fitted into the grout hole 76c of the elliptical ring 76.
2 is provided in such a manner that the axis is coincident.

On the other hand, as shown in FIGS. 3 and 4, at the end of the other protruding arm 37B located on the opposite side of the rotary drum 32, a reversible motor 45 composed of a hydraulic motor or the like is rotatably driven. The rotating shaft 45a of the reversing motor 45 is provided so as to coincide with the reversing axis CT2. The reversing motor 45 is provided with a disk-shaped reversing table 46B around the reversing axis CT2 via bearings 49B. It is provided so that it can rotate in the direction. Further, a rotation shaft 45a of a reversing motor 45 is connected to the reversing table 46B, and the reversing table 46B rotates in the directions of arrows P and Q about the reversing axis CT2 by rotating the reversing motor 45. The joining surface 46Ba is provided on the reversing table 46B so as to substantially coincide with the curved surface of the inner surface 76d of the elliptical ring 76. The grout of the elliptical ring 76 is provided at the center of the joining surface 46Ba of the reversing table 46. A convex fitting pin 47B that can be fitted into the hole 76c is provided in such a manner that its axis coincides with the inversion axis CT2.

As an example of an aging tunnel to which the method for restoring an aging tunnel according to the present invention is applied, an aging tunnel 85 is shown in FIG. 1 and FIG. , B, an aging tunnel 85 that has been excavated and lined is constructed. 9, an invert 85b is formed below (in the direction of arrow D), and an arch 85a is formed in the upper part (in the direction of arrow C), as shown in FIG. Have been. These arches 85a and inverts 85b
Are continuously formed in such a manner that the surface of the lining, such as concrete, is exposed and extends from the direction of arrow A to the direction of arrow B.

As shown in FIGS. 1 and 9, the elliptical ring 76 used in the restoration method of the aging tunnel according to the present invention is configured such that the conventionally divided segment is replaced with the horseshoe-shaped cross-section of the aging tunnel 85. In a corresponding form, it is formed integrally into a ring. That is, it is formed in an elliptical shape so that the height inside the aging tunnel 85 corresponds to the length of the long axis and the width inside the aging tunnel 85 corresponds to the length of the short axis. In addition, a semicircular groove-shaped concave portion shown in FIG. 10A is provided on one end surface 76 a serving as a joining surface of the elliptical ring 76 over the entire circumference of the elliptical ring 76. The other end surface 76b serving as a joining surface is provided with a convex portion having a semicircular cross section so as to be able to engage with the concave portion over the entire circumference of the elliptical ring 76. Therefore, as shown in FIG. 10A, the elliptical rings 76 are joined so that the concave portions and the convex portions provided on the end surfaces 76a and 76b are engaged with each other. Since the concave and convex portions provided on the end surfaces 76a and 76b only need to be able to engage with each other, they may be formed in a trapezoidal cross-sectional shape as shown in FIG. In this specification, the term “ellipse” means not a strict “ellipse” in the mathematical sense, but a “slim-shaped circle” that is not a “perfect circle”. Of course, it also includes the exact "ellipse" in the mathematical sense.

Since the transport device 20, the aging tunnel 85, and the elliptical ring 76 applied to the present invention have the above-described configurations, a new lining is built in the aging tunnel 85 using the transport device 20. When carrying out and restoring, the transportation device 2
At 0, the elliptical ring 76 is carried into the aging tunnel 85 and built. Therefore, first, in a material storage outside the aging tunnel 85, the laying elliptical ring 76B to be laid is loaded on the transport reversing device 20 in a horizontally long state. That is, the traveling wheel 23 of the transport reversing device 20 is driven to rotate and travels on the ground to the vicinity of the material storage outside the aging tunnel 85, and is moved on the ground. After moving to the side of 76B, the reversing device 30 of the transport reversing device 20 shown in FIG.
A and 21B are separated from the crank arms 26A and 26B. At this time, the centering jacks 50A, 50B of the first and second transport vehicles 21A, 21B are retracted downward (in the direction of the arrow L). As shown in FIG. 5, the reversing device 30 includes a wire 81 on the eye plates 39, 39 of the reversing device 30.
81, etc., and is moved and placed near the laying elliptical ring 76B to be carried in which is placed horizontally by a crane or the like. Then, the wire 81 is removed from one of the eye plates 39, and the wire 81 is again hung on the eye plate 39 through the laying elliptical ring 76B to be carried in. The crane is used to gradually lift the reversing device 30 by a crane. The reversing axis CT2 of the reversing device 30 is aligned with the long axis of the laying elliptical ring 76B.

If the elliptical ring 76B for laying can be lifted so that the long axis of the elliptical ring 76B substantially coincides with the reversing axis CT2 of the reversing device 30, this state is maintained, and as shown in FIG. Is inserted into the grout hole 76Bc of the laying elliptical ring 76B, and the joining surface 46Ba of the reversing table 46B is brought into contact with the inner surface 76Bd of the laying elliptical ring 76B. After the insertion of the insertion pin 47B, the support jack 41 is protruded in the direction of arrow G to the elliptical ring support length D2, and the insertion pin 47A is inserted into the grout hole 76Bc of the laying elliptical ring 76B. Is brought into contact with the inner surface 76Bd of the laying elliptical ring 76B. Further, by projecting the support jack 41 in the direction of arrow G,
The joining surfaces 46Aa of the reversing tables 46A, 46B at both ends,
While the 46Ba is in contact with the inner surface 76Bd of the laying elliptical ring 76B, the reversing device 30 is stretched and fixed. At this time, the center CTR of the laying elliptical ring 76B
And the upright axis CT1 of the reversing device 30 match. In addition,
Joining surfaces 46Aa, 46B of reversing tables 46A, 46B
a is formed into a curved surface so as to be able to abut against the inner surface 76Bd of the laying elliptical ring 76B with less backlash.
A rubber sheet, a resin sheet, urethane, or the like may be attached to 6Aa, 46Ba.

After inserting these insertion pins 47A and 47B, the elliptical ring 7 for laying together with the reversing device 30 by a crane is used.
6B is further lifted, and the first and second carriages 21 are lifted.
A and 21B move between the crank arms 26A and 26B. And, the reversing support arm 31A of the reversing device 30,
The fitting portions 26Aa, 26B of the crank arms 26A, 26B are inserted into the support holes 31Aa, 31Ba of the base 31B, respectively.
Insert Ba. Further, the reversing support arms 31A, 31B
Fixing holes 31Ab and 31Bb of the crank arm 26
The reversing device 30 is fixed to the first and second carriages 21A and 21B by inserting the fixing pins 27 and 27 so as to penetrate the fixing holes 26Ab and 26Bb of A and 26B.
At this time, the crank arm 26A is fixed to the rotating drum 32 by a hydraulic or the like of the upright motor 35 so that the crank arms 26a and 26B do not hang down on the upright axis CT1. The crank arm 26B is fixed to the rotating drum 32 by an appropriate fixing means such as a detent pin. After the fixation, the eye plate 3 of the reversing device 30
The wires 81, 81 are removed from 9, 39, and the traveling wheels 23 of the transport reversing device 20 are rotationally driven to travel on the ground, and the horizontally long laying elliptical ring 76B is carried into the aging tunnel 85.

In the aging tunnel 85, the elliptical ring 76B for laying by the transport reversing device 20 is used.
Prior to the transportation into the aging tunnel 85, the discharge of water or the like flowing through the aging tunnel 85 is stopped, and the water is discharged from the aging tunnel 85 so as not to hinder the restoration work.

Therefore, when the discharge into the aging tunnel 85 is stopped and the drainage in the aging tunnel 85 is completed, the traveling wheels 23 of the transport reversing device 20 are driven to rotate and run on the ground. As shown in (a), the laying elliptical ring 76B in a horizontally long state is carried into the aging tunnel 85. Next, after the laying elliptical ring 76B in the horizontally long state is transported by the transport reversing device 20 to a substantially central portion in the aging tunnel 85, the laying is performed according to the procedure shown in FIGS. Oval ring 76B for existing oval ring 76
Join to A. First, in the aging tunnel 85, prior to or in parallel with loading of the laying oval ring 76B in the horizontally long state into the aging tunnel 85 by the transport reversing device 20, as shown in FIG. Oval ring 7
A ramp 90 having a triangular cross section is installed so as to smoothly connect a step between the 6A and the invert 85b of the aging tunnel 85. In this way, when the transport reversing device 20 carries in the horizontally long laying elliptical ring 76B to the place where the inclined road stand 90 is installed, the first transporting cart 21A of the transport reversing device 20 is then drawn. As shown in FIG. 8 (b), it is positioned and stopped so as to be located within the inner surface 75d of the new tunnel 75 formed by the elliptical ring 76 already erected.

Next, the first carriage 21A is moved to the tunnel 75.
8B, the loading centering jack 50B of the second transporting vehicle 21B of the transport reversing device 20 (or the loading centering of the first transporting vehicle 21A, if necessary), as shown in FIG. The jack 50 </ b> A may be used together with the crank arm 2.
6A and 26B are moved in the up and down direction (directions of arrows C and D), so that the laying elliptical ring 76B in the horizontally long state is the center CTR of the laying elliptical ring 76B and the construction direction of the tunnel 75 to be newly constructed. A rough rough centering (hereinafter referred to as a center CTR of the laying elliptical ring 76B and a center CTT in the construction direction of the tunnel 75 to be newly constructed) is performed so that the center CTT substantially coincides with the center CTT (in the directions of arrows A and B). Is referred to as “centering”), and the crank arms 26A and 26B are fixed at the rough centering position.

Next, after the crank arms 26A and 26B are fixed at the rough centering position, the upright motor 35 of the reversing device 30 of the transport reversing device 20 is rotated to rotate the rotating drum 32.
8 is rotated by 90 ° in the direction of arrow S to obtain FIG.
(B) As shown in FIG.
6B is rotated 90 ° in the direction of arrow S around the upright axis CT1, so that the laying elliptical ring 76B is in a vertically elongated state (FIG. 8).
(B) as indicated by the two-dot chain line). At this time, if necessary, the centering jacks 50A and 50B of the transport reversing device 20 are appropriately protruded and retracted so that the crank arm 2
6A and 26B are moved in the vertical direction (the directions of arrows C and D) to interfere with the arch 85a and the invert 85b of the aging tunnel 85 when the laying elliptical ring 76B rises from the horizontal state to the vertical state. Avoid. The laying elliptical ring 76B is arranged such that the reversing motor 45 of the reversing device 30 is positioned above (upward in the figure),
The elliptical ring 7 for laying is formed in such a manner that the reversing table 46B connected to the
6B is supported.

Next, the laying elliptical ring 76 in the horizontally long state is laid.
When B has been raised upright, the reversing motor 45 of the reversing device 30 is driven to rotate the reversing table 46B by 90 ° in the direction of arrow Q as shown in FIG. 8C. As a result, the laying elliptical ring 76B in the vertically long state is such that the inner diameter D1 on the minor axis side of the elliptical ring 76B is the reversing device 30.
Is larger than the maximum width X of the erecting device 30A, and the reversing shaft C is formed by sandwiching the reversing device 30 and the crank arms 26A, 26B between the inner surfaces 76Bd of the laying elliptical rings 76B.
It can rotate 90 ° in the direction of arrow Q around T2.
That is, the laying elliptical ring 76B fits the laying state of the existing elliptical ring 76A, that is, as shown in FIG. 8C, the end face 76Bb of the laying elliptical ring 76B.
And the end surface 76Aa of the existing elliptical ring 76A is inverted.

Next, the laying elliptical ring 76 in the vertically long state is installed.
8B, the loading centering jacks 50A and 50B of the transport reversing device 20 are protruded and retracted in the vertical direction (arrows K and L directions) as shown in FIG. By moving 26B in the up and down direction (directions of arrows C and D), the inverted elliptical ring 76B in the vertically elongated state is accurately centered, and the crank arms 26A and 26B are fixed at the centering position. I do. Also, the ramp 90 is removed so that the end surface 76Bb of the laying elliptical ring 76B can be joined to the end surface 76Aa of the existing elliptical ring 76A.

Next, when the ramp 90 is removed, as shown in FIG. 8D, the wheels 23 of the first and second transporters 21A and 21B of the transport reversing device 20 are driven to rotate rearward (arrows). (B direction), and the end face 76Bb of the laying elliptical ring 76B is joined to the end face 76Aa of the existing elliptical ring 76A. And the existing elliptical ring 76A
Inner surface 76Ad and the inner surface 76 of the laying elliptical ring 76B
Bd, a rectangular plate-like backing plate 78 is connected to each of the elliptical rings 76A and 76B by fastening bolts or the like so as to straddle these elliptical rings 76A and 76B.
Is connected via a plate 78 to prevent the built-in elliptical ring 76 from falling over.

By the way, these laying elliptical rings 76
B and the existing elliptical ring 76A are, as shown in FIG. 10 (a), a convex portion having a semicircular cross-sectional shape provided over the entire circumference of the end surface 76Bb of the laying elliptical ring 76B, and the existing elliptical ring 76A. Are joined in such a manner as to engage with semicircular groove-shaped recesses provided over the entire circumference of the end face 76Aa of the end face 76Aa. It is securely joined without causing water leakage and enhancing the water stopping effect. Note that these end faces 7
The concave and convex portions provided in 6a and 76b are, as described above,
As long as they can be engaged with each other, they may be formed in a trapezoidal cross-sectional shape as shown in FIG.

In this way, the transport reversing device 20, which has carried in the laying elliptical ring 76B in the horizontally long state from outside the aging tunnel 85, rotates the upright motor 35 of the reversing device 30 to rotate the horizontally long state. The laying elliptical ring 76B can be erected vertically. Further, by rotating the reversing motor 45, the laying elliptical ring 76B standing upright in the vertically long state can be reversed so as to match the laying state of the existing elliptical ring 76A. Further, the loading centering jack 5 of the transport reversing device 20
The laying elliptical ring 76B is centered by protruding and retracting the 0A and 50B appropriately in the vertical direction (arrows K and L directions) and swinging the crank arms 26A and 26B in the vertical direction (arrows C and D directions). be able to. Therefore, since the loading and the reverse joining work including the centering of the elliptical ring can be performed by one device, the elliptical ring can be efficiently inverted and joined even in a narrow space such as a tunnel having a small inner diameter. be able to.

Next, when the laying elliptical ring 76B has been joined to the existing elliptical ring 76A, as shown in FIG. 9, the space between the bottom of the outer surface 76Be of the laying elliptical ring 76B and the invert 85b is adjusted. Support block 7
7 and 77 are inserted and properly supported so that the laying elliptical ring 76B does not fall down. In this way, after joining the laying elliptical ring 76B to the existing elliptical ring 76A, attaching the abutment plate 78 and the support bases 77 and 77 to the laying elliptical ring 76B to prevent falling and dropping,
The transport reversing device 20 is removed from the laying elliptical ring 76B.

That is, the transport reversing device 20 retreats the support jack 41 of the reversing device 30 shown in FIG. 2 (b) so as to be shorter than the elliptical ring support length D2 in the direction of arrow H, and pushes the fitting pin 47A. Withdrawing from the grout hole 76Bc of the laying elliptical ring 76B and pulling out the fitting pin 47B from the grout hole 76Bc of the laying elliptical ring 76B.
As a result, the laying elliptical ring 76B is released from being restrained by the transport reversing device 20, and the laying elliptical ring 76B and the transport reversing device 20 are separated. Then, the upright motor 35 of the reversing device 30 of the transport reversing device 20 is driven to rotate, and the rotating drum 32 is rotated 90 degrees in the direction of the arrow S (or the direction of the arrow R). The jack 41 and the like are made substantially parallel to the crank arms 26A and 26B.

The first and second transport reversing devices 20
The transport reversing device 20 is moved outside the tunnel by moving the transport vehicles 21A and 21B. As described above, the reverse joining operation of joining the laying elliptical ring 76B carried in the horizontally long state to the existing elliptical ring 76A can be performed. Then, after loading the new laying oval ring 76B again at the material storage area by the transport reversing device 20, it passes through the aging tunnel 85 or through the inside of the laying oval ring 76B thus joined, The laying elliptical ring 76B to be newly joined is carried in a horizontally long state, and the elliptical ring 76 is erected by repeating the inverting joining work.

Further, as described above, when a new laying oval ring 76B is sequentially built, a new backfill layer 71, which is a void, is provided between the aged tunnel 85 and the laying oval ring 76B. Then, the backfill layer 71 is formed so as to extend sequentially in the direction of arrow A. Therefore, the backfill layer 71 is backfilled with a grout pump or the like to fill the mortar 72 with a grout pump or the like, thereby constructing the lining of the tunnel 75. Here, the mortar 72 is a backing material,
Since the elliptic ring 76 as the lining member is a member for fixing and supporting the ground 70, the mortar 72 hardens, thereby completing the construction of the lining of the tunnel 75.

Therefore, for a predetermined work time, for example, 1
When the work of setting the elliptical ring 76 on a part of the entire length of the aging tunnel 85 is performed from 8:00 to 17:00 on the day, the work is completed. By the way, since the integrated elliptical ring 76 is built, unlike the case where concrete is cast, without waiting for the cast concrete to solidify, immediately after the oval ring 76 is built, immediately as usual. Water can be passed.
Therefore, when the construction work is completed, the aging tunnel 8
5 and the equipment carried into the tunnel 75 are carried out from the aging tunnel 85 or the tunnel 75,
After all the workers have evacuated, the discharge of water or the like to the aging tunnel 85 is resumed, and the aging tunnel 85 is used as normally used. Aging tunnel 8
Prior to the discharge to 5, the tip of the backfill layer 71 filled with the mortar 72 at the end of the erection work is appropriately subjected to a waterproof treatment so as to avoid the influence of the restart of the discharge.

Therefore, only for a predetermined discharge time, for example, 1
When water or the like is discharged into the aging tunnel 85 from 8:00 to 8:00 the next day, the use of the aging tunnel 85 is suspended. Then, before carrying the laying elliptical ring 76B into the deteriorated tunnel 85 again, the discharge of water and the like flowing through the deteriorated tunnel 85 is stopped, and the water in the deteriorated tunnel 85 is discharged. After the drainage is completed, the elliptical ring 76 is carried into the aging tunnel 85 again for a predetermined operation time, and the elliptical ring 76 is erected for a part of the entire length of the aging tunnel 85.

As described above, by repeatedly stopping the discharge to the aging tunnel 85 and restarting the discharge, the working time in the aging tunnel 85 can be secured. Also,
Since the integrated elliptical ring 76 is built in, unlike the case where concrete is cast, water is supplied as usual immediately after the oval ring 76 is built without waiting for the cast concrete to solidify. can do. Therefore, the release into the aging tunnel 85 is stopped, and the elliptical ring 7 is stopped.
To restore the aging tunnel 85 by using the aging tunnel 85 and constructing a new tunnel 75 inside the aging tunnel 85 by repeating the three work steps of building 6 and resuming discharge. Can be. Further, as a tunnel 75 to be newly constructed inside the aging tunnel 85, an elliptical ring 76 formed in a shape corresponding to the cross-sectional shape of the aging tunnel 85 is used. Water volume loss can be minimized.

Furthermore, since the laying elliptical ring 76B is supported from both sides by the crank arms 26A and 26B of the transport reversing device 20, even a large elliptical ring is safely loaded and inverted in a stable state. And can be joined. In addition, the upright axis CT1 of the reversing device 30 of the transport reversing device 20 is matched with the center CTR passing through the center of gravity of the laying elliptical ring 76B, and the reversing axis CT2 of the reversing device 30 is set to By passing through the center of gravity, it is possible to rotate the laying elliptical ring 76B around each axis without the eccentricity and with the minimum rotational moment, so it is necessary to rotate the laying elliptical ring 76B around each axis. Energy is minimized, and the laying elliptical ring 76B can be rotated efficiently, well-balanced, and safely. Therefore, during the limited working time, the work of setting the elliptical ring can be performed efficiently even in a narrow space.

In the above-described embodiment, the case of constructing a tunnel having a vertically long elliptical cross section has been described.
A tunnel may be constructed by arranging a ring in which segments forming a lining are integrated in a ring shape. For example, a tunnel having a horizontally long elliptical cross section or a tunnel having a rectangular cross section may be used. Further, in the above-described embodiment, the case where the elliptical ring 76 is built from one example of the aging tunnel 85 has been described. It goes without saying that it can be built from both sides. Further, in the above-described embodiment, the suspension and resumption of the release into the aging tunnel 85 are described as one cycle per day. However, it is determined in consideration of the usage of the aging tunnel to be restored, the efficiency of the restoration work, and the like. Therefore, one cycle of stopping and resuming the release into the aging tunnel may be any number of days.

[0039]

As described above, according to the present invention, in a canal to be restored, such as an aging tunnel 85, the first step of stopping the discharge into the canal, corresponding to the cross-sectional shape of the canal. Oval rings such as elliptical rings 76, 76A, 76B formed in an annular shape,
A second step of carrying into the waterway tunnel and building along the waterway tunnel along a part of the entire length of the waterway tunnel; and a third step of restarting discharge into the waterway tunnel. Since the second and third steps are sequentially repeated, the elliptical ring is built in the waterway tunnel over the entire length of the waterway tunnel.

Since the elliptical ring is formed in a ring shape, even if the diameter of the channel tunnel to be restored is small, the ring-shaped ring formed in the ring is carried in a horizontally long state, and is reversely joined in the channel tunnel. Can be built with just
Work efficiency in a narrow space is improved, and a new tunnel using an elliptical ring can be efficiently constructed. Also,
Unlike the case where concrete is cast, water can be immediately passed as usual after the oval ring is built without waiting for the cast concrete to solidify.
Further, by repeatedly stopping and resuming the discharge to the tunnel, the working time in the aging tunnel can be secured. Therefore, while releasing the water to the canal tunnel to be rehabilitated, an elliptical ring is erected on a part of the total length of the canal tunnel so that a new tunnel can be used while using the canal tunnel. A tunnel can be constructed to restore the waterway tunnel. In addition, since the elliptical ring is formed in an annular shape corresponding to the cross-sectional shape of the channel tunnel to be restored, a decrease in the water flow capacity of the channel tunnel to be restored can be minimized.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a transport reversing device according to the present invention.

FIG. 2 is a perspective view showing the movement of the transport reversing device shown in FIG. 1, and FIG. 2 (a) is a view showing a state where a horizontally long elliptical ring is erected in a vertically long state. (B)
FIG. 4 is a view showing a state where an upright elliptical ring is rotated so as to match a laying state of an existing elliptical ring.

FIG. 3 is a plan view of the reversing device of the transport reversing device shown in FIG. 1;

FIG. 4 is a side view of the reversing device shown in FIG. 3;

FIG. 5 is a front view of the reversing device shown in FIG. 3;

FIG. 6 is a schematic diagram of a rotating mechanism for raising the reversing device shown in FIG. 3;

FIG. 7 is a detailed view of a fitting portion of the transport reversing device shown in FIG. 1 where the transport vehicle fits into the reversing device.

8A and 8B are diagrams showing a procedure for reversely joining a laying elliptical ring carried in by the transport reversing device shown in FIG. 1 so as to match the laying state of an existing elliptical ring, and FIG.
FIG. 4 is a view showing a state where the laying elliptical ring is mounted on the transport reversing device. (B) is a figure which shows the place where the laying elliptical ring in a horizontal state was set up in the vertical state.
(C) is a figure which shows the place where the upright elliptical ring was rotated so as to match the laying state of the existing elliptical ring. (D) is a figure which shows the place where the elliptical ring for installation was joined to the existing elliptical ring.

FIG. 9 is a cross-sectional view showing a state where a drain groove is provided outside a tunnel.

FIG. 10 is a sectional view showing a shape of an end face of the elliptical ring. (A) is sectional drawing of the end surface of the elliptical ring shown in FIG. (B) is sectional drawing which shows the end surface of another shape.

[Explanation of symbols]

 76, 76A, 76B ... oval ring 85 ... waterway tunnel to be restored (decrepit tunnel)

Claims (1)

(57) [Claims] 1. A first step of stopping discharge into the waterway tunnel in a waterway tunnel to be restored, wherein an oval ring formed in an annular shape corresponding to the cross-sectional shape of the waterway tunnel is provided in the waterway tunnel. A second step of carrying in and building along a part of the entire length of the waterway tunnel along the waterway tunnel; and a third step of restarting discharge into the waterway tunnel. These first, second and third steps A tunnel restoration method in which the elliptical ring is built in the waterway tunnel over the entire length of the waterway tunnel.