JP2001193393A - Segment and connecting structure for connecting metal fitting pressing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment capable of easily connecting a connecting metal fitting pressing device to it and a connecting structure for the connecting metal fitting pressing device. SOLUTION: The connecting metal fitting pressing device 45 is connected to the segment 1 by engaging a reaction force receiving member 56 with the outside in the orthogonal direction to the facing direction of the connecting metal fittings 3 set opposedly to each other. Consequently, complicated connecting work can be dispensed with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment forming a cylindrical wall body in the axial direction of a drilled hole by connecting a plurality of segments to each other, and a connecting fitting pushing device for pushing a connecting fitting for connecting the segments to the segment. And a connection structure of a connection fitting pushing device.

[0002]

2. Description of the Related Art As a method of constructing a tunnel, a so-called shield method is generally used, in which a concrete wall is constructed by assembling a concrete segment on the inner surface side of an excavation hole. As the segments used in this shield method, those having a plane rectangular shape and an arc plate shape are mainly used, and these segments are joined to each other by bolts. As a structure for joining the segments with the bolts, a joint plate having holes communicating with each other when the joint surfaces of the segments are brought into contact with each other is buried in the vicinity of the joint surface of the segments, and these joint plates are embedded. Insert the bolt into the hole of
A structure in which a nut is fastened and joined to the bolt is generally used. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and bolts penetrating adjacent segments are fastened to each other for joining.

However, in such a structure, a bolt is inserted into a hole formed in a joint surface of a joint at a construction site, a nut is fastened to the bolt, or a bolt is inserted into an insert fitting embedded in each segment. Therefore, there is a limit in shortening the assembling time, and it is difficult to adapt to automatic assembling by a robot. Furthermore, even if the secondary lining is omitted, it is necessary to close the bolt box formed in the segment in order to install the bolt and nut, and a new joint is aimed at speeding up the construction and saving labor. At present, the development of the structure was urgently needed.

[0004] Here, as a joining structure that allows the segments to be joined very easily, a C-shaped joining bracket is embedded at a position opposing the joining surface of the segments.
By fitting the I-shaped connecting fittings whose both ends are engaged with these C-shaped connecting fittings, the C-shaped connecting fittings are connected to each other by the I-shaped connecting fittings, and the joining surfaces of the segments are joined together. Is being developed.

[0005]

By the way, when the I-type connecting metal fitting is pushed into the C-shaped connecting metal fitting of the segment, a connecting metal fitting pressing device for generating a pushing force is used. In order to receive the reaction force of the pushing device, it is necessary to connect the connecting fitting pushing device to the segment,
Therefore, there is a problem that necessary work is complicated. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a segment and a connection structure of a connection fitting pushing device that can easily connect the connection fitting pushing device.

[0006]

In order to achieve the above object, the connecting structure of the segment and the connecting metal fitting pushing device according to the first aspect of the present invention has joining grooves formed on both joining surfaces, respectively. Each of the grooves is provided with a pair of hooks having a pair of hook-shaped locking portions each of which has an inwardly bent locking piece. The bonding surfaces are butt against each other, and the bonding brackets are opposed to each other. A pair of segments which are set in an insertion hole formed by the joining grooves of the pair of segments in an engagement space formed between the engaging portions and engage with the engaging piece. The joining part is provided on both sides of the plate-shaped fitting main body, the connecting fitting is pushed in from one side by a connecting fitting pushing device, and the connection structure of the segment and the joining fitting pushing device when connecting the joining fittings to each other. Ah A jack portion for generating a pushing force for pushing the connection fitting into the connection fitting pushing device, and a reaction force generated when the jack portion is pushed by the jack portion extending along the pushing direction of the jack portion and engaging with the segment. A receiving reaction force receiving member is provided, and the reaction force receiving member is engaged with an outer side in a direction orthogonal to a facing direction of the joint fittings facing each other.

As described above, since the reaction force receiving member is engaged with the outside in the direction orthogonal to the facing direction of the joining metal fittings facing each other, the connecting metal fitting pushing device is connected to the segment, so that complicated connection is required. Work becomes unnecessary.

According to a second aspect of the present invention, there is provided a connecting structure for a segment and a connecting metal fitting pushing device, wherein a pair of the connecting metal fittings face the connecting metal fitting to form a concave half. A split portion is formed, and the reaction force receiving member engages with the concave portion formed by the concave half portion of the joint metal fitting which is opposed to each other.

In this manner, the joint metal fitting is formed with the concave half portion that forms the concave portion by the pair of members facing each other, and the reaction force receiving member is engaged with the concave portion formed by the concave half portion. Therefore, the configuration required for the engagement can be simplified.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a connecting structure of a segment and a connecting fitting pushing device according to an embodiment of the present invention. 1 to 4, reference numeral 1 denotes a segment. The segment 1 is made of concrete formed in a rectangular shape in plan view and in an arc plate shape in side view.
Joining surfaces 1a of the ends of these segments 1 in the circumferential direction
Are joined to each other so that a ring constituting a cylindrical wall body is formed in the excavation hole. The ring is sequentially joined to the face of the shield machine from the wellbore side of the excavation hole to form a cylindrical wall. As shown in FIG. 1, these segments 1 have joining grooves 2 extending in a direction along the axis of the drilled hole, that is, the axis of the segment 1, on the joining surface 1 a.
However, a plurality of, specifically, two rows are formed in the thickness direction (radial direction) of the segment 1.

Each of the joining grooves 2 is provided with a plurality of, specifically, two C-shaped joining brackets 3 along the axial direction of the segment 1, and one segment 1 and another segment 1 are opposed to each other. The joining fittings 3 are connected to each other by the I-shaped connecting fitting 4.

As also shown in FIGS.
Is provided with a pair of hook-shaped locking portions 6 having locking pieces 5 at the ends so as to face each other, and is opposed to the locking pieces 5 of the pair of locking portions 6. The sides are connected parts 15
Are connected to form a C-shape in side view. The space formed by these locking portions 6 matches the joining groove 2, and is an engaging space 8 in which the engaging portion 7 of the connection fitting 4 is engaged.

A locking surface 9 formed by the inner surface of the locking piece 5
Is a tapered surface that narrows the engagement space 8 toward the insertion direction A of the connection fitting 4. That is, in a state where the joining surfaces 1a of the segments 1 abut against each other, the engaging surfaces 9 of the joining fittings 3 facing each other are tapered surfaces that gradually approach toward the rear in the insertion direction of the connecting fittings 4.

A plurality of, specifically, three projections 14 are arranged in the joining metal fitting 3 along the insertion direction of the connecting metal fitting 4. Screw portions 10 are respectively formed.
An anchor bar 11 is screwed and connected to each of the anchor bar connecting female threads 10 in a state of extending to the opposite side to the locking unit 6. A support plate 12 that is substantially perpendicular to the axis of the anchor bar 11 is integrally formed at the end of the anchor bar 11.

Further, the joining metal fitting 3 includes an anchor bar 1
A plurality of ribs 13 are formed at the connection position with the first bracket 1 in a direction intersecting the insertion direction A of the connection fitting 4.

Here, the face side joining metal fitting 3 (3B) on the face side of the excavation hole, that is, the side on which the shield machine for excavating the ground is provided, is connected to the face side of the shield machine (that is, the connecting metal part). The end surface 30 on the front side of the insertion side of No. 4 is aligned with the end surface 31 on the cutting face side of the shield machine of the segment 1.

In this embodiment, the face-side joining metal fittings 3 (3B) are opposed to each other when the pair of segments 1 abut against each other. Other outer face ends in a direction perpendicular to the direction and other face-side joining metal fittings 3 (3
At an end on the side opposite to B), a concave half portion 40 is formed. The concave half portion 40 includes a pair of segments 1
Are opposed to each other so that the pair of face-side joining metal fittings 3 (3B) are opposed to each other, so that the opposed pair of fittings are joined to form one concave portion 41.
Then, such concave portions 41 are respectively arranged at both outer end portions in a direction orthogonal to the facing direction of the pair of face-side joining metal fittings 3 (3B) facing each other.

Further, a pair of face-side joint fittings 3 (3B) are brought into a state of being opposed to each other when the pair of segments 1 abut against the concrete portion of the segment 1.
The connecting metal fitting 4 penetrates the end face 31 at the boundary between both outer sides of the face-side joining metal fitting 3 (3B) in the direction orthogonal to the facing direction and at the end facing the other segment 1.
The groove half portions 42 extending to the position of the concave half portion 40 along the insertion direction of the groove and communicating with the concave half portion 40 are formed. The groove half portion 42 is configured to form one insertion groove 43 by a pair of opposing segments being joined by abutment of a pair of segments 1. And such an insertion groove 43 is
A pair of face-side joining metal fittings 3 (3
It is arranged on both outer sides in a direction orthogonal to the facing direction of B).

The connecting fitting 4 for connecting the joining fittings 3 between the segments 1 is formed in an I-shaped cross section as shown in FIG. 8, and the both sides of the plate-like connecting fitting main body 21 are as described above. Thus, the engaging portion 7 is fitted into the engaging space 8 of the joint fitting 3. The connecting metal body 21 is formed thinner than the gap between the locking pieces 5 of the locking parts 6 of the bonding metal 3 and can be inserted therethrough. Is formed thicker than the gap. Further, the engaging surface 22 formed on the engaging portion 7 of the connecting metal fitting 4 which comes into contact with and engages with the locking surface 9 of the locking piece 5 of the connecting metal fitting 3
And the same tapered surface as the locking surface 9.

Here, the joining metal fitting 3 has a wellhead side joining metal fitting 3 (3A) on the wellhead side of the excavation hole in the joining groove 2, that is, the joining side to the existing ring. The wing side, that is, the side on which the shield machine for digging the ground is provided is the face-side joining metal fitting 3 (3B). On the other hand, each of the connection metal fittings 4 connects the wellhead side connection metal fittings 3 (3A) to each other, and is used as the wellhead side connection metalwork 4 (4A) to connect the cutting face side connection metal fittings 3 (3B). This is used as the face-side connecting bracket 4 (4B).

In a state where the joining surfaces 1a of the segments 1 abut against each other, when the wellhead-side connecting fitting 4 (4A) is inserted into the insertion hole 23 formed from the joining groove portion 2, the wellhead side Engaging part 7 of connecting metal 4 (4A)
However, it passes through the engaging space 8 of the cutting face type connecting metal fitting 3 (3B) and engages with the wellhead side connecting metal fitting 3 (3A).

That is, the minimum distance L1 between the engaging portions 7 of the wellhead side connection fitting 4 (4A) is equal to the joining surface 1a of the segment 1.
Face-side joining metal fittings 3 in a state where they are butted against each other
(3B) is larger than the maximum distance L2 between the inner surfaces of the locking pieces 5, and the maximum width dimension L3 of the wellhead side connection fitting 4 (4A) is such that the joining surfaces 1 a of the segments 1 abut each other. The gap L4 between the bottoms forming the engagement space 8 of the face-side joining metal fitting 3 (3B) is set to be smaller than that (see FIG. 3). In addition, the joining metal fitting 3 and the connecting metal fitting 4 are both rounded at their corners so that stress concentration does not occur.

Next, a description will be given of a connection fitting pushing device for pushing the connection fitting 4 into the segment 1 with reference to FIG.
The connection fitting pushing device 45 includes a jack 46 for generating a pushing force for pushing the connection fitting 3, and the jack 46.
And a reaction force receiving portion 47 which receives a reaction force when the connecting fitting 3 is pushed by the jack portion 46 by engaging with the segment 1 and extending along the pushing direction of the connecting member 3.

The jack part 46 has a cylindrical cylinder 49.
And a piston 50 fitted in the cylinder 49 and reciprocating hydraulically or electrically with respect to the cylinder 49. The connection fitting pushing device 45 is provided with a push button and a push release button (not shown). When the push button is pressed, the piston 50 moves forward to a position where the amount of protrusion is largest with respect to the cylinder 49, and the push release is performed. When the button is pressed, the piston 50 retreats with respect to the cylinder 49 to a position where the amount of protrusion is smallest.

The reaction force receiving portion 47 is rotatably supported by the cylinder 49 of the jack portion 46 at a central position in the longitudinal direction and extends from the jack portion 46 in opposite directions. 52, and a screw member 53 via gears 54a and 54b.
, A guide member 55 supported by the cylinder 49 of the jack portion 46 at a central position in the length direction and extending from the jack portion 46 in parallel with the screw member 53, and a screw portion of the screw member 53. 52, is fitted to the guide member 55, and is supported so as to extend along the pushing direction of the jack portion 46. As a result, a pair of symmetrically arranged around the jack portion 46 is provided. And a reaction force receiving member 56.

Here, each reaction force receiving member 56 is
A rectangular parallelepiped arm portion 58 and a rectangular parallelepiped reaction force receiving member protruding in a direction perpendicular to the arm portion 58 and protruding in a direction approaching another reaction force receiving member 56 at a distal end portion of the arm portion 58 that is farthest from the screw member 53. And an L-shaped portion.
The L-shaped reaction force receiving member 56 is
1 can be fitted.

The reaction force receiving members 56 are
The screw member 53 and the guide member 55 which rotate by the driving of
The mirrors can be moved toward and away from each other while maintaining a mirror-symmetric state with respect to the jack portion 46 as a center. Here, although not shown, the connection fitting pushing device 45 is provided with a fitting button and a fitting releasing button,
When the fitting button is pressed, the drive circuit of the drive motor 54 rotates the screw member 53 so as to move the reaction force receiving members 56 in the approaching direction to the predetermined positions closest to each other. On the other hand, when the mating release button is pressed,
The drive circuit of the drive motor 54 rotates the screw member 53 so as to move the reaction force receiving members 56 in the separating direction to a predetermined position where the reaction force receiving members 56 are separated most.

The distance between the two reaction force receiving and locking portions 59 of the two reaction force receiving members 56 is set to the distance between the bottom surfaces of the two concave portions 41 of both segments 1 which are in abutting state in the state of being closest to each other. The distance is set to be greater than the distance between the open ends of the two concave portions 41 of both segments 1 in the abutted state in the most distant state.

Next, the case of joining the segments 1 will be described with reference to FIGS. Segment 1
To join them, first, the joining surfaces 1a in the circumferential direction of these segments 1 are brought into contact with each other. In this way, the corresponding ones of the joining grooves 2 formed on the joining surface 1a of each segment 1 are butted against each other to form the insertion hole 23. In addition, each segment 1
Corresponding ones of the groove halves 42 formed on the joining surface 1a of the first and second joints abut against each other to form an insertion groove 43, and correspond to the concave half halves 40 formed on the respective face-side joining metal fittings 3 (3B). The parts that meet each other are abutted against each other to form the recess 41.

In this state, first, the connection fitting pushing device 45 is attached to the butted segments 1. That is, as shown in FIGS. 10 to 11,
The two insertion groove portions 4 arranged on both sides in a direction orthogonal to the facing direction with respect to the pair of face-side joining metal fittings 3 (3B) of the pair of segments 1 butted against each other.
The two reaction force receiving members 56 of the connection fitting pushing device 45 which are most separated from each other are inserted into 3, and the positions of the both reaction force receiving and locking portions 59 are aligned with the concave portions 41 in the insertion direction. Then, in this state, the fitting button of the connection fitting pushing device 45 is pressed. Then, as shown in FIG. 11, the reaction force receiving portion 47 rotates the drive motor 54 to rotate the two reaction force receiving members 56.
Move in the directions approaching each other, and both the reaction force receiving and locking portions 59 are simultaneously fitted into the both concave portions 41. As a result, the segments 1 and the connection fitting pushing device 45 in the butted state are connected to each other.

Then, from this state, as shown in FIG. 12, the wellhead side connection fitting 4 (4A) is separated from the cutting face side connection fitting 3.
(3B) and the piston 50 in the retracted state of the connection fitting pushing device 45, and the wellhead side connection fitting 4 (4A)
To the insertion hole 23. When the push button is pressed, the connection fitting pushing device 45 causes the piston 5 to move.
13 moves forward (projects), while the reaction force receiving and locking portions 59 of the reaction force receiving portion 47 are locked by the two concave portions 41 formed by the both segments 1 and receive a reaction force. As shown in (2), the wellhead-side connection fitting 4 (4A) is pushed into the insertion hole 23.

Next, the push release button of the connection fitting pushing device 45 is pressed to move the piston 50 backward, and
As shown in (1), the spacer 24 made of resin or the like is arranged between the cutting face side joining metal fitting 3 (3B) and the piston 50 in the retracted state of the connecting metal fitting pushing device 45, and the position of the spacer 24 is inserted. Align with hole 23. Then, when the push button is pressed, the piston 50 advances (projects) from the connection fitting pushing device 45, while the two reaction force receiving and locking portions 59 of the reaction force receiving portion 47 are both recessed portions 41 formed by both segments 1.
As shown in FIG. 15, the spacer 24 enters the insertion hole 23 while further pushing the wellhead-side connection fitting 4 (4A).

Next, the push release button of the connection fitting pushing device 45 is pressed to move the piston 50 backward, and
As shown in the figure, the face-side connecting fitting 4 (4B) is arranged between the face-side connecting fitting 3 (3B) and the piston 50 in the retracted state of the connecting-piece pushing device 45, and the face-side connecting fitting 4 is provided. 4 (4B) is aligned with the insertion hole 23. And
When the push button is pressed, the piston 50 advances (projects) from the connection fitting pushing device 45 while the reaction force receiving portion 47 is pressed.
The two reaction force receiving and locking portions 59 are locked by the two concave portions 41 formed by the two segments 1 and receive a reaction force.
As shown in FIG. 7, the cutting face side connection fitting 4 (4B) enters the insertion hole 23 while further pushing the spacer 24 and the wellhead side connection fitting 4 (4A).

Further, the push-release button of the connection fitting pushing device 45 is pressed to move the piston 50 backward, and as shown in FIG. (3B) and between the piston 50 in the retracted state of the connection fitting pushing device 45,
The position of the spacer 25 is adjusted to the insertion hole 23. When the push button is pressed, the connection fitting pushing device 4 is pressed.
While the piston 50 advances (projects) from the position 5, the reaction force receiving and locking portions 59 of the reaction force receiving portion 47 receive the reaction force by being locked by the two concave portions 41 formed by the both segments 1. ,
As shown in FIG. 19, the spacer 25 is composed of the cutting face side connection fitting 4 (4B), the spacer 24 and the wellhead side connection fitting 4.
(4A) is further pushed into the insertion hole 23.

As described above, the wellhead side connection fitting 4 (4A)
Passes between the face-side joint fittings 3 (3B) and reaches the wellhead-side joint fitting 3 (3A).
(3A) is fitted. In other words, the wellhead side connection fitting 4
The engagement part 7 of (4A) fits into the engagement space 8 of the wellhead side fitting 3 (3A), and the respective wellhead side fitting 3 (3A).
A) are connected to each other by the wellhead side connection fitting 4 (4A). Here, the engagement surface 22 formed of the tapered surface of the engagement portion 7 of the wellhead side connection fitting 4 (4A) is connected to the wellhead side joint fitting 3.
By sliding in contact with the locking surface 9 of the locking piece portion 5 of (3A), which is a tapered surface, the wellhead-side joint fittings 3 (3A) are attracted to each other.

In addition, as described above, the face-side connecting metal fitting 4
(4B) is fitted to the face-side joining metal fitting 3 (3B). That is, the engaging portions 7 of the face-side connecting metal fittings 4 (4B) are fitted into the engaging spaces 8 of the face-side connecting metal fittings 3 (3B), and the respective face-side connecting metal fittings 3 (3B). Are connected to each other by the cutting face side connection fitting 4 (4B). Also in this case, the engaging surface 22 formed of the tapered surface of the engaging portion 7 of the face-side connecting metal fitting 4 (4B) is connected to the face-side connecting metal fitting 3 (3B).
By sliding in contact with the locking surface 9 formed of a tapered surface of the locking piece portion 5 of the
(3B) Each other is attracted to each other.

Then, the push release button of the connection fitting pushing device 45 is pressed to move the piston 50 backward. Further, by pressing the mating release button and rotating the drive motor 54, the two reaction force receiving members 56 of the connection fitting pushing device 45 are set in the most separated state, and the two reaction force receiving and locking portions 59 are set in the two concave portions 41. And pull out the connection fitting pushing device 45 from both the insertion grooves 43. Thereafter, a filler such as mortar is filled between the wellhead side connection fitting 4 (4A), the spacer 24, the cutting face side connection fitting 4 (4B) and the spacer 25 and the insertion hole 23 at an appropriate timing as necessary. I do.

The above operations are all performed on the plurality of insertion holes 23 to complete the joining between the segments 1.

If necessary, the piston 50 of the cylinder 49 is made to protrude in a state where the connection fitting pushing device 45 is connected to the segment 1 as described above, and the tip thereof is connected to the spacer 25 and the cutting face side. When the push release button is pressed in a state where the metal fitting 4 (4B), the spacer 24, and any of the wellhead side connecting metal fittings 4 (4A) are connected, the piston 50 retreats from the connecting metal fitting pressing device 45, while the reaction force is increased. The two reaction force receiving and locking portions 59 of the receiving portion 47 are locked with the two concave portions 41 of the both segments 1 to receive a reaction force, so that the connected piston 50 is pulled out.

According to the above-described embodiment, the recess 41 is formed by a pair of opposed face ends of the face-side joining metal fittings 3 (3B) facing each other in a direction orthogonal to the facing direction. Is formed in the concave portion 40, and the reaction force receiving member 5 is formed in the concave portion 41 formed by the concave portion 50.
Since the connecting fitting pushing device 45 is connected to the segment 1 by the engagement of 6, the complicated connecting work is not required. Therefore, the connection fitting 4 and the spacers 24, 25
Can be pushed into the segment 1 satisfactorily. In addition, a concave half portion 40 is formed on the face 3 side of the metal fitting 3 (3B) so that the concave portion 41 is formed by a pair of opposed components, and a reaction force is applied to the concave portion 41 formed by the concave half portion 40. Since the receiving member 56 is engaged, the configuration required for the engagement can be simplified.

[0041]

As described above, according to the connecting structure of the segment and the connecting metal pushing device according to the first aspect of the present invention, the reaction force receiving members are moved in the direction in which the connecting metal fittings facing each other are opposed to each other. Since the connection fitting pushing device is connected to the segment by engaging the outer side in the direction orthogonal to the direction perpendicular to the direction, complicated connection work is not required. Therefore, the segment and the connection fitting pushing device can be easily connected.

Further, according to the connecting structure of the segment and the connecting metal fitting pushing device according to the second aspect of the present invention, the connecting metal fitting is formed with a concave half-split portion which forms a concave part by facing a pair of the metal fittings. Since the reaction force receiving member is engaged with the concave portion formed by the concave half portion, the configuration required for the engagement can be simplified.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one joint of segments according to an embodiment of the present invention.

FIG. 2 is a perspective view of one joint of the segments according to the embodiment of the present invention.

FIG. 3 is a plan cross-sectional view of one joining point of the segments according to the embodiment of the present invention.

FIG. 4 is a side sectional view of one joining point of the segments according to the embodiment of the present invention.

FIG. 5 is a plan view of a fitting used for joining the segments according to the embodiment of the present invention.

FIG. 6 is a side view of a joint used for joining the segments according to the embodiment of the present invention.

FIG. 7 is a rear view of the joint fitting used for joining the segments according to the embodiment of the present invention, from which an anchor streak is removed.

FIG. 8 is a perspective view of a connection fitting used for joining the segments according to the embodiment of the present invention.

FIG. 9 is a side view of the connection fitting pushing device according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 12 is a cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 13 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 15 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 16 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 17 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 18 is a cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 19 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 segment 1a joining surface 2 joining groove 3 joining fitting 4 connecting fitting 5 locking piece 6 locking section 7 engaging section 8 engaging space 21 connecting fitting main body 23 insertion hole 40 concave half section 41 concave section 42 groove half section 43 insertion groove part 45 connecting metal fitting pushing device 46 jack part 47 reaction force receiving part 56 reaction force receiving member

Claims (2)

[Claims] 1. A joining bracket having a pair of hook-shaped engaging portions each having a joining groove portion formed on each of joining surfaces on both sides, and a joining piece portion having an end portion bent inward in each of the joining groove portions. Each is formed between the locking portions, in an insertion hole formed by the joining grooves of a pair of segments in which the joining surfaces are butted against each other and the joining fittings are opposed to each other. The connection fittings arranged in the engagement space and engaged with the locking pieces are provided on both sides of the plate-shaped fitting main body, and the connection fitting pressing device pushes the connection fitting from one side, A connection structure of a segment and a connection fitting pushing device for connecting the joining fittings to each other, wherein the connection fitting pushing device generates a pushing force for pushing the connection fitting, and a method of pushing the jack portion. And a reaction force receiving member extending along the segment and receiving a reaction force at the time of pushing by the jack portion by engaging with the segment, wherein the reaction force receiving members are opposed to each other by the joining fittings facing each other. A coupling structure for a segment and a coupling fitting pushing device, characterized in that the segment and the coupling fitting pushing device are engaged outside in a direction orthogonal to the segment. 2. The joining fitting has a recessed half portion that forms a recess when a pair of opposed fittings are opposed to each other, and the reaction force receiving members are connected to each other in the joining fitting of the joining fitting. 2. The connecting structure of a segment and a connecting metal fitting pushing device according to claim 1, wherein the connecting structure engages with the concave portion formed by the concave half portion.