JPH11193693A - Segment joint structure, segment and segment assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment joint, capable of firmly joining segments together, segments using it and a firm segment assembly method. SOLUTION: A grooved opening 3 is provided on the axial side face 15 of a segment 1 and a circumferential opening 9 is provided on the circumferential side face 13. A strip protrusion 7 is provided on the other axial side face 19 of the segment 1 and a hooked protrusion 5 is provided on the other circumferential side face 17. The protrusion 7 of the segment 1 is inserted into the grooved opening 3 of the other segment and the hooked protrusion 5 of the segment is hooked at the circumferential opening 9 of the other segment to join the segment 1 to the other segment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a segment used in a shield tunnel, a segment, and a method of assembling the segment.

[0002]

2. Description of the Related Art At present, when constructing a tunnel such as a road or a railway, a shield method is generally used. In the shield method, segments are assembled in an annular shape behind the shield while excavating the ground with a shield machine. FIG. 29 is a diagram showing a segment 403 built in the shield tunnel 401. Each segment 403 is generally connected to each other by bolts in a tunnel axial direction and a circumferential direction and is constructed.

[0003]

However, when the segments are joined by bolts, the joint has low rigidity,
It is a drawback of the inner wall of the tunnel. Therefore, after assembling the segments, concrete is sometimes reinforced by construction.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a segment joint for firmly joining segments, a segment using the same, and a method for assembling a firm segment. Is to provide.

[0005]

According to a first aspect of the present invention, an axial side surface is provided so as to be orthogonal to the axial direction of the shield tunnel, and the axial side surface is orthogonal to the circumferential direction of the shield tunnel. Is a joint structure of a segment having a circumferential side surface arranged in such a manner that a strip-shaped protrusion provided on the axial side surface is provided on an axial side surface of another segment joined to the segment. And a projecting portion is engaged with the groove-shaped opening, and the segments in the axial direction are joined to each other.

According to a second aspect of the present invention, a groove-like opening is provided on a side surface of a segment, and a joint plate is placed in a groove-like opening of a pair of segments to be joined. A segment joint structure characterized by joining segments together.

A third aspect of the present invention comprises a key-like projection provided on a circumferential side surface of a segment, and an opening provided on a circumferential side surface of another segment to be joined to the segment. A segment joint structure wherein a key-like projection is engaged with the opening to join circumferential segments together.

According to a fourth aspect of the present invention, there is provided a segment having an axial side surface arranged to be orthogonal to the axial direction of the shield tunnel and a circumferential side surface arranged to be orthogonal to the circumferential direction of the shield tunnel. The segment joint according to the first aspect of the present invention is provided on an axial side surface of the segment.

According to a fifth aspect of the present invention, there is provided a segment having an axial side surface arranged perpendicular to the axial direction of the shield tunnel, and a circumferential side surface arranged orthogonal to the circumferential direction of the shield tunnel. The segment joint according to the third invention is provided on a circumferential side surface of the segment.

A sixth aspect of the present invention is characterized in that segments having an upper surface and four side surfaces are arranged in a staggered manner, and the segments are arranged so that the segments are turned upside down for each line in the tunnel axial direction. This is how to assemble the segments.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of the segment 1 according to the present embodiment. 2 is a perspective view of the segment 1 from the direction D shown in FIG. 1, FIG. 3 is a cross-sectional view of the segment 1 taken along line AA in FIG. 1, and FIG.
FIG. 5 is a sectional view taken along the line CC in FIG. The segment 1 is provided with a circumferential side surface 13, a circumferential side surface 17, an axial side surface 15, and an axial side surface 19 made of a steel material or the like on a top steel plate 11.

As shown in FIGS. 1, 3 and 4, a groove-like opening 3 is provided on an axial side surface 15 of the segment 1.
The circumferential side surface 13 is provided with a circumferential opening 9. As shown in FIGS. 2 and 4, the strip-shaped projection 7 is provided on the other axial side face 19 of the segment 1, and the key-shaped projection 5 is provided on the other circumferential side face 17. .

FIG. 6 shows segments 1-4 and segment 1.
1 is a cross-sectional view of the vicinity of a groove-shaped opening 3 and a protrusion 7 of FIG. A large diameter claw 71 is provided at the tip of the projection 7.
A spring steel installation part 65 is provided at the tip of the groove-shaped opening 3,
A spring steel 63 is installed in the spring steel installation section 65. FIG. 7 is a perspective view of the spring steel 63. The spring steel 63 has a length approximately equal to the length of the groove of the groove-shaped opening 3, and is installed inside the spring steel installation portion 65.

FIG. 8 shows a segment 1-1 and a segment 1-
FIG. 4 is a cross-sectional view of the vicinity of a key-like projection 5 and a circumferential opening 9 of the second embodiment. The circumferential opening 9 has a size such that the key-like projection 5 can be inserted. FIG. 9 is a diagram showing how to assemble the segments. 9, segments 1-2, 1-3,...
.., 1-6 are already joined. In this state, the segment 1-1 is moved in the direction G, and the key-shaped projection 5-1 of the segment 1-1 is moved to the circumferential side surface 13- of the segment 1-2.
2 is inserted into the circumferential opening 9 provided on the base 2.

Next, the segment 1-1 is moved in the direction H. The projection 7-1 of the segment 1-1 is the segment 1
-4 and segments 1-5 are inserted into the groove-shaped openings 3 provided on the axial side surfaces 15-4 and the axial side surfaces 15-5. In addition, the key-shaped projection 5-1 inserted into the circumferential opening 9 of the circumferential side surface 13-2 is hooked and fixed to the circumferential side surface 13-2 of the segment 1-2. Therefore, the segment 1-1 is joined to the segments 1-2, 1-4 and 1-5 in the tunnel axial direction and the circumferential direction.

FIG. 10 shows the groove-like opening 3 and the projection 7 after bonding.
It is sectional drawing of a vicinity. 6, when the protrusion 7 is inserted into the groove-shaped opening 3, the claw 71 is inserted into the spring steel 63 while pushing the spring steel 63 in the direction F. FIG.
When the protrusion 7 is completely inserted, the spring steel 63 returns to its original shape, and the claw 71 is hooked on the end of the spring steel 61 and fixed.

Although a plurality of projections 7 are provided on the segment 1-1, they are inserted into other groove-shaped openings 3 in the same manner. FIG. 11 is a cross-sectional view of the vicinity of the key-shaped protrusion 5 and the circumferential opening 9 after bonding. When the segment 1-1 having the key-shaped protrusion 5 shown in FIG. 8 is moved in the direction K, the key-shaped protrusion 5 is inserted into the circumferential opening 13 of the segment 1-2.

Further, when the segment 1-1 having the key-like projections 5 shown in FIG. 8 is moved in the direction L, the key-like projections 5 are moved to the circumferential side surfaces 13 of the segments 1-2 as shown in FIG. Fixed to The segment 1-1 is provided with a plurality of key-shaped projections 5, which are fixed to other circumferential openings 9 in the same manner.

As described above, according to the embodiment of the present invention,
The mutual segments can be firmly joined. In addition, joining can be performed only by moving the segments, and the work of tightening metal bolts in the conventional joining operation is not required, and the work efficiency of tunnel inner wall construction can be improved.

FIG. 12 relates to another embodiment of the present invention.
FIG. 7 corresponds to FIG. 6 and is a cross-sectional view of the vicinity of the protrusion 7 and the groove-shaped opening 3. In FIG. 12, a large-diameter claw portion 71 is provided at the tip of the protrusion 7. A rubber 93 is provided at the tip of the groove-shaped opening 3 and a top 95 is provided inside the rubber 93.

FIG. 13 shows the projection 7 and the groove-like opening 3 after bonding.
FIG. When the protrusion 7 is inserted into the grooved opening 3, the claw 71 presses the top 95, the rubber 93 is deformed, and the claw 71 is inserted into the top 95. Thereafter, the top portion 95 returns to its original shape due to the elasticity of the rubber 93, and the claw portion 71 is hooked and fixed to the top portion 95.

FIG. 14 is a perspective view of a segment 141 according to another embodiment. FIG. 15 is a perspective view of the segment 141 shown in FIG. Segment 14
Reference numeral 1 denotes a top steel plate 143 having a circumferential side surface 146, a circumferential side surface 152, an axial side surface 144, and an axial side surface 149.
Is provided.

In the segment 141, the axial side surface 1
44 has a groove-shaped opening 145, and a circumferential side surface 146 is provided with a circumferential opening 147. Further, a projection 151 is provided on the axial side surface 149, and a key-shaped projection 153 is provided on the circumferential side surface 152.

In the segment 1, the groove-shaped opening 3 and the projection 7 are provided in the direction perpendicular to the upper steel plate 11, but in the segment 141, the groove-shaped opening 145 and the projection 151 are formed with respect to the upper steel plate 143. It is provided in the horizontal direction. However, the internal structure of the groove-shaped opening 145 is the same as the structure of the groove-shaped opening 3 shown in FIG. 6, and the protrusion 151 can be inserted into the groove-shaped opening 145 in a similar manner.

In the segment 1, the key-shaped projection 5 is bent in the tunnel axis direction, but the key-shaped projection 153 of the segment 141 is bent toward the upper steel plate 143. The method of joining the segments 141 in the circumferential direction is the same as that of the segment 1 shown in FIGS. 8 and 11, and the key-shaped protrusion 153 is inserted into the circumferential opening 147 and hooked, so that the circumferential side surface is joined. 146.

Although the segments 1 and 141 are hollow segments called steel segments or ductile segments, the present invention can also be used for composite segments. FIG. 16 is a cross-sectional view of a composite segment 161 according to another embodiment, taken along a cross section corresponding to the CC cross section of FIG.

The composite segment 161 is formed on an upper plate 163 made of steel or ductile cast iron.
64 and a circumferential side surface (not shown) are provided, and the inside is filled with concrete 165. Synthetic segment 161
In the figure, a protrusion 167 similar to the protrusion 7 of the segment 1 is provided on the axial side surface 162, and the axial side surface 164 is provided.
Has a groove-like opening 1 similar to the groove-like opening 3 of the segment 1.
69 are provided. A key-like projection 5 and a circumferential opening 9 are also provided on the circumferential side surface (not shown), similarly to the segment 1.

FIG. 17 is a sectional view of a composite segment 171 according to another embodiment. In this embodiment, FIG.
6, a reinforcing bar 177 is provided in the segment 161 shown in FIG. The provision of the reinforcing bar 177 increases the rigidity of the composite segment 171.

FIGS. 18 to 23 show modified examples of the projection 167 and the groove-shaped opening 169 of the composite segments 161 and 171. FIG. As shown in FIG. 18, a joint plate 189 is provided on the axial side surface 184 of the segment 182. A groove-like opening 187 is provided on the axial side surface 183 of the segment 181. 185a, 185
b is concrete.

FIG. 19 is a view showing the structure near the joint plate 189 after joining. In FIG. 19, when the segment 182 is moved and the joint plate 189 is inserted into the grooved opening 187, the tip of the joint plate 189 hits the concrete wall inside the grooved opening 187, and the segment 182 is further moved. As shown in FIG. 19, the distal end of the joint plate 189 is divided, each is inserted into the groove-shaped opening 187, and the segment 182 and the segment 181 are joined.

FIG. 20 shows another modification.
As shown in FIG.
4 is provided with a hollow joint plate 209. A groove-like opening 207 is provided on the axial side surface 203 of the segment 201. Note that 205a and 205b are concrete.

FIG. 21 is a view showing the structure near the hollow joint plate 209 after the joining. In FIG. 20, segment 202
Is moved, and the hollow joint plate 209 is inserted into the grooved opening 207.
21, the hollow joint plate 209 is deformed as shown in FIG. 21 by further moving the segment 202 and fitted into the groove-shaped opening 7, and the segment 202 and the segment 201 are joined. .

FIG. 22 shows another modification, and FIG.
, Segment 221 and segment 2
The inside of 22 is provided with concrete 225a, 225b, and a groove-like opening 227-1 and a groove-like opening 227-2 are provided on the axial side surface 223-1 and the axial side surface 223-2. Groove-shaped opening 227-2 on segment 222 side
The hollow joint plate 229 is installed inside, and the segment 222
Is moved, the hollow joint plate 229 is inserted into the groove-like opening 227-1 of the segment 221.

FIG. 23 is a view showing the structure near the hollow joint plate 229 after joining. In FIG.
To move the hollow joint plate 229 to the groove-like opening 227-1.
23, the tip of the hollow joint plate 229 hits the concrete 225a inside the grooved opening 227-1, and further moves the segment 222, so that the hollow joint plate 229 is deformed as shown in FIG. Segment 22
2 and the segment 221 are joined.

In the embodiment shown in FIG.
9 may be provided in the segment 182 in advance, or a joint plate 189 may be provided in the segment 182 on site. In the embodiment shown in FIG.
May be provided in the segment 202 in advance, or may be attached on site. In the embodiment shown in FIG. 22, the hollow joint plate 229 is attached mainly on site.

FIG. 24 is a view showing a modification of the key-like projection 5 and the circumferential opening 9 of the segment 1 shown in FIG. As shown in FIG. 24, the circumferential side surfaces 255, 257 of the segments 251, 253 have circumferential openings 259,
261 are provided. The concave joint plate 263 is the segment 2
51 and the segment 253 are joined.

FIG. 25 is a sectional view of the segments 251 and 253 viewed from the direction S in FIG. As shown in FIG. 25, the concave joint plate 263 is inserted into the circumferential opening 259 on the segment 251 side, and the top part 267 is inserted between the concave joint plate 263 and the circumferential side surface 255, The concave joint plate 263 is fixed.

FIG. 26 is a view showing the structure near the concave joint plate 263 after the joining. In FIG. 25, segment 25
1 is moved in the direction P, and the concave joint plate 263 is inserted into the circumferential opening 261 on the segment 253 side. When the segment 251 is further moved in the direction Q, as shown in FIG. 26, the concave joint plate 263 is hooked on the circumferential side surface 257 on the segment 253 side, and the segment 251 and the segment 253 are joined. The joint structure shown in FIGS. 18 to 23 can be used not only on the axial side surface but also on the circumferential side surface.

FIG. 27 relates to another embodiment of the present invention and is a view showing a method of assembling a composite segment as viewed from inside a tunnel. The composite segment 303 has the same structure as the segment 161 or the segment 171.
A pair of axial side surfaces 309 and a pair of circumferential side surfaces 311 are provided on a top plate 307 made of steel or cast iron, and are filled with concrete 305.

As shown in FIG.
3 is assembled such that rows arranged so that the top plate 307 can be seen in the tunnel and rows arranged so that the concrete 305 side can be seen alternately. FIG. 28 is a cross-sectional view taken along the line RR of FIG.
3-4 are arranged.

By the method of assembling the segments as shown in FIGS. 27 and 28, it is possible to construct the inner wall of the shield tunnel which is resistant to positive and negative bending moments.
The segment assembling method shown in FIGS. 27 and 28 can also be performed with the segment as shown in FIG.

[0042]

As described above in detail, according to the present invention, it is possible to provide a segment joint for firmly connecting mutually segments, a segment using the same, and a method for assembling a firm segment. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a segment 1 according to an embodiment of the present invention.

FIG. 2 is a perspective view of a segment 1 from a direction D.

FIG. 3 is a sectional view of the segment 1 taken along the line AA.

FIG. 4 is a sectional view of the segment 1 taken along line BB.

FIG. 5 is a sectional view of the segment 1 taken along line CC.

FIG. 6 is a view showing the vicinity of a projection 7 and a groove-like opening 15 of a segment.

FIG. 7 is a perspective view of a spring steel 63.

FIG. 8 is a view showing the vicinity of a key-like projection 5 and a circumferential opening 9 of a segment.

FIG. 9 is a diagram showing a method of assembling segments.

FIG. 10 is a diagram showing the vicinity of a protrusion 7 and a groove-like opening 15 after bonding.

FIG. 11 shows a key-like projection 5 and a circumferential opening 9 after bonding.
Diagram showing the neighborhood

FIG. 12 is a diagram showing the vicinity of a protrusion 7 and a groove-shaped opening 3 according to another embodiment.

FIG. 13 is a diagram showing a bonding state of FIG. 12;

FIG. 14 is a diagram showing a segment 141 according to another embodiment.

FIG. 15 is a perspective view of a segment 141 from a direction I.

FIG. 16 shows a composite segment 16 according to another embodiment.
Figure showing 1

FIG. 17 shows a composite segment 17 according to another embodiment.
Figure showing 1

FIG. 18 is a diagram showing a configuration near a joint plate 189;

FIG. 19 is a view showing a joint state by a joint plate 189;

FIG. 20 is a diagram showing a configuration near a hollow joint plate 209;

FIG. 21 is a diagram showing a joining state by a hollow joint plate 209;

FIG. 22 is a diagram showing a configuration near a hollow joint plate 229;

FIG. 23 is a diagram showing a joining state by a hollow joint plate 229;

FIG. 24 is a diagram showing a joint structure on a circumferential side surface according to another embodiment.

FIG. 25 is a view showing a joining method using a concave joint plate 263;

FIG. 26 is a diagram showing a joining state by the concave joint plate 263;

FIG. 27 is a diagram showing a method of assembling segments as viewed from inside the tunnel.

FIG. 28 is a sectional view taken along line RR of FIG. 27;

FIG. 29 shows a shield tunnel 401.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Segment 3 ... Groove-shaped opening 5 ... Key-shaped protrusion 7 ... Protrusion 9 ... Circumferential opening 11 ... Top steel plate 13 ... Circumferential side surface 15… axial side 17… circumferential side 19… axial side

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[Procedure amendment]

[Submission date] February 1, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an axial side surface arranged so as to be orthogonal to the axial direction of the shield tunnel, and an axial side surface which is orthogonal to the circumferential direction of the shield tunnel. A joint structure of a segment having a circumferential side surface to be disposed, the joint structure being provided on the axial side surface, having a strip shape, having a claw portion provided at a tip, and being joined to the segment. A groove-shaped opening provided on the axial side surface of another segment, and having a height substantially equal to the strip-shaped protrusion, and a plate-shaped having a height substantially equal to the height of the groove-shaped opening. And a spring steel which is bent so as to partially have a gap and is inserted and installed in the groove-shaped opening. The projection is inserted into the gap of the spring steel, and the spring steel and the projection are formed. Segment wherein the parts are engaged It is a joint structure.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

A second invention is a joint structure of a composite segment in which concrete is filled inside and at least a part of the segment is covered with steel or ductile cast iron,
A joint plate provided on the side surface of the segment and having a strip shape and having at least a distal end portion separated, and provided on the side surface of another composite segment joined to the composite segment, and a part of a steel material or ductile cast iron is cut out. And a groove-shaped opening provided so that the joint plate is bent and inserted into the concrete portion. The joint plate is inserted into the groove-shaped opening and deformed, and a tip end of the joint plate is formed. The joint structure of a segment, wherein the joint plate and the groove-shaped opening are engaged so that a portion comes into contact with the steel material or the ductile cast iron.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] A third invention is a joint structure of a composite segment in which concrete is filled inside and at least a part of the segment is covered with steel or ductile cast iron,
A strip-shaped joint plate provided on a side surface of the synthetic segment, and a groove-shaped opening provided on a side surface of another synthetic segment joined to the synthetic segment, wherein the joint plate is formed by the groove-shaped opening. The joint structure is characterized in that the joint plate is deformed when the synthetic segments are inserted into each other and the synthetic segments come into close contact with each other, and the synthetic segments are joined by bringing the deformed portion into contact with the steel material or the ductile cast iron.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

A fourth invention is a joint structure of a composite segment in which concrete is filled inside and at least a part of the segment is covered with steel or ductile cast iron,
A groove-shaped opening is provided on the side surface of the synthetic segment, and a joint plate is placed in the groove-shaped opening of a pair of synthetic segments to be joined. Or, it is a segment joint structure characterized by joining synthetic segments together by contacting with ductile cast iron.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a fifth aspect of the present invention, there is provided a segment having an axial side surface arranged perpendicular to the axial direction of the shield tunnel, and a circumferential side surface arranged orthogonal to the circumferential direction of the shield tunnel. The joint structure of the segment of the first invention is provided on the axial side surface of the segment. According to a sixth aspect of the present invention, the joint structure of any one of the second to fourth aspects of the present invention is provided on a side surface of a synthetic segment in which concrete is filled and at least a part of the segment is covered with steel or ductile cast iron. Is a segment provided.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

A seventh aspect of the present invention is characterized in that segments having an upper surface and four side surfaces are arranged in a staggered manner, and the segments are arranged so that the segments are turned upside down for each row in the tunnel axial direction. This is the method of assembling the segments. Further, the eighth invention is directed to a segment comprising an axial side surface arranged orthogonally to the axial direction of the shield tunnel and a circumferential side surface arranged orthogonally to the circumferential direction of the shield tunnel. An opening is provided on the circumferential side surface of the segment, a concave joint plate is mounted on the opening on the circumferential side surface of the segment, and the segment is fixed with a top portion. A segment assembling method, wherein an opening of another segment is engaged with a joint plate of a shape, and the segments are joined to each other.

Claims (9)

[Claims] 1. A segment joint structure having an axial side surface disposed orthogonal to the axial direction of a shield tunnel and a circumferential side surface disposed orthogonal to a circumferential direction of a shield tunnel. And a strip-shaped protrusion provided on the axial side surface, and a groove-shaped opening provided on the axial side surface of another segment to be joined to the segment, wherein the protrusion is formed by the groove. A joint structure for a segment, wherein axial segments are engaged with each other by being engaged with the opening. 2. A spring steel is provided in the groove-shaped opening, a claw is provided at a tip of the projection, and the claw is hooked on the spring steel, and the groove-shaped opening and the projection are connected to each other. The joint structure of a segment according to claim 1, wherein the joint structure is engaged. 3. A groove member is provided with a rubber member and a top portion at the groove-shaped opening portion. A claw portion is provided at a tip of the projection, and the claw portion is hooked on the top portion, and the groove-shaped opening is provided. The joint structure for a segment according to claim 1, wherein the portion and the protrusion are engaged with each other. 4. The protrusion is deformed after being inserted into the groove-shaped opening, so that the protrusion and the groove-shaped opening are
The joint structure of a segment according to claim 1, wherein the joint structure is engaged. 5. A groove-like opening is provided on a side surface of a segment, and a joint plate is placed in a groove-like opening of a pair of segments to be joined. When the segments come into close contact with each other, the joint plate is deformed to join the segments together. A joint structure for a segment, comprising: 6. A joint structure of a segment having an axial side surface arranged perpendicular to the axial direction of the shield tunnel and a circumferential side surface arranged perpendicular to the circumferential direction of the shield tunnel. A key-shaped protrusion provided on the circumferential side surface; and an opening provided on a circumferential side surface of another segment to be joined to the segment, wherein the key-shaped protrusion is A segment joint structure in which circumferential segments are joined by being engaged with an opening. 7. An axial direction of a segment having an axial side surface arranged orthogonal to the axial direction of the shield tunnel and a circumferential side surface arranged orthogonal to the circumferential direction of the shield tunnel. A segment provided with the segment joint according to claim 1 on a side surface. 8. The circumference of a segment having an axial side surface arranged orthogonal to the axial direction of the shield tunnel and a circumferential side surface arranged orthogonal to the circumferential direction of the shield tunnel. A segment provided with the segment joint according to claim 6 on a side surface in a direction. 9. A method for assembling a segment, comprising arranging segments having an upper surface and four side surfaces in a staggered manner, and arranging the segments such that the segments are turned upside down for each line in the tunnel axial direction. .