JPH11280388A - Connecting section of segment for tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the connecting section of a segment for a tunnel, in which the machining of the connecting section and the connecting works of a segment body are facilitated and specified clamping force can be generated. SOLUTION: The second connecting section R2 of a second segment body S2 is pushed into the first connecting section R1 of a first segment body S1 from the front side to the interior side for coupling the second segment body S2 with the existing first segment body S1 in the tunnel peripheral direction X and pulled and joined mutually in the connecting section of the segment for the tunnel. An engaging surface 5 and a surface to be engaged 2 inclined in the tunnel peripheral direction X to the pushing direction Y of the second segment body S2 and mutually engaged freely are both distributed and formed to the second connecting section R2 and the first connecting section R1, and deforming means H freely deformed by receiving external force in the same direction so that at least one can be moved in the tunnel peripheral direction X when the second segment body S2 is pushed in and the engaging surface 5 and the surface to be engaged 2 are drawn mutually are mounted at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the first
With the second butting surface of the second segment body abutting against the first butting surface of the segment body, the first segment body and the second segment body are connected in the circumferential direction of the tunnel to form a tunnel wall. Therefore, a first connecting portion is provided in the vicinity of the first butting surface, and a second connecting portion is provided in the vicinity of the second butting surface, and the second segment main body is arranged along the tunnel longitudinal direction with respect to the first segment main body. The first connecting portion and the second connecting portion are engaged with each other by being pushed from the near side to the far side, and are attracted to each other to connect the first segment main body and the second segment main body. Regarding the connection of segments.

[0002]

2. Description of the Related Art Conventionally, a connecting portion of a tunnel segment of this kind is used particularly for connecting tunnel segment bodies adjacent to each other in the circumferential direction of the tunnel, and is provided at an end of the tunnel segment body. When the formed butting surfaces are connected one after the other,
A connecting tool is inserted across two dovetails formed at both ends along the longitudinal direction of the tunnel on both abutting surfaces, and both tunnel segment bodies are pulled and connected. The connection tool is, for example, a substantially rectangular member in which a pair of enlarged edges are connected by a flat body, and each enlarged edge is used by being inserted into both dovetail grooves. Here, of the two tunnel segment bodies adjacent in the circumferential direction of the tunnel, the one constructed first is the first segment body, and the one constructed later is the second segment body. Regarding two dovetail grooves provided on the abutting surface of the segment body, the back side along the pushing direction of the second segment body is referred to as a back side dovetail section, and the near side is referred to as a near side dovetail section. Conventionally, for example, as shown in FIG. 6, the back side dovetail portion M1 of the first segment body S1
a is provided with a back side connecting member Ga, and a near side dovetail portion M2b of the second segment main body S2 is also provided with a front side connecting member Gb. In some cases, the pressing of the rear dovetail groove M2a of the second segment main body S2 into the connecting tool Ga and the pressing of the front connecting tool Gb into the front dovetail groove M1b of the first segment main body S1 may be performed simultaneously. In this case, the insertion direction of the back side connection tool Ga into the back side dovetail groove M2a of the second segment body S2, and the near side connection tool Gb into the front side dovetail groove M1b of the first segment body S1.
And the connecting direction of each of the connecting members is inserted from the end face of the segment body in the tunnel longitudinal direction Y to the center side of the segment body.

[0003]

However, when the first segment main body S1 and the second segment main body S2 are connected by the conventional pushing method, there are the following problems.

[0004] For example, in order to securely push the near-side connecting member Gb attached to the near-side dovetail portion M2b of the second segment body S2, the position of the pushing means J for applying a pushing force to the second segment body S2 is determined as follows. It is necessary to set the position where the pushing of the second segment body S2 and the pushing of the connecting tool Gb provided in the dovetail groove portion M2b on the near side of the second segment body S2 can be simultaneously performed. If only the second segment body S2 is pushed in, the connecting tool G
b is left outside the front side dovetail portion M2b. Therefore, when the pushing means J is not a dedicated device, or when the device provided with the pushing means J is a tunnel shield and the tunnel shield rotates in the tunnel circumferential direction X, for example, the pushing means J In some cases, the connector Gb may move to a position where it cannot be pushed in, and the pushing of the connector Gb may be insufficient, and the performance of the connecting portion may be impaired.

[0005] The connecting portion is connected to a connecting tool G and a dovetail groove M.
In this case, the connecting tool G and the dovetail groove M are required to have a predetermined machining accuracy. For example, the interval between the enlarged edges 20 of the coupling tool G is set to be opposite to the dovetail groove M.
If the gap is smaller than the distance between the two, it becomes difficult to insert the connector G sufficiently.
If the distance is wider than each other, it becomes difficult to sufficiently attract the first segment main body S1 and the second segment main body S2. For this reason, if it is attempted to increase the accuracy of the connecting tool G or the like in order to connect the first segment main body S1 and the second segment main body S2 while generating a predetermined attractive force, the manufacturing of the connecting tool G or the like is required. It was very time-consuming.

Further, in the case of the above-mentioned prior art, the dovetail groove M had to be formed in both the first segment main body S1 and the second segment main body S2. The weight of the segment main bodies S1 and S2 increases, and there is also a disadvantage that the material cost or the transport cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art, and to facilitate the processing of the connecting portion and the connecting operation of the segment main body, and the connecting portion of the tunnel segment capable of generating a predetermined fastening force. Is to provide.

[0008]

Means for Solving the Problems (Structure 1) To achieve this object, the connecting portions of the tunnel segments according to the present invention are arranged in the pushing direction of the second segment body S2. On the other hand, an engaging surface and an engaged surface that are inclined in the tunnel circumferential direction X and are freely engageable with each other are formed separately in the second connecting portion and the first connecting portion, and the second segment main body S2 is formed. When the engaging surface and the engaged surface are pushed together to attract each other, at least one of the engaging surface and the engaged surface is movable along the tunnel circumferential direction so as to be movable along the tunnel circumferential direction. It is characterized in that it is provided with a deforming means that can be deformed by receiving an external force. (Operation / Effect) If the engaging surface, the engaged surface, and the deforming means are provided as in the present configuration, the distance between the second abutting surface and the engaging surface can be reduced when the second segment body is pushed. Can be adjusted, even if there is a manufacturing error in the first segment main body or the second segment main body, etc., the deforming means can eliminate the influence of these manufacturing errors, and the predetermined attraction force can be reliably achieved. Can be generated.

(Structure 2) In the connecting portion of the tunnel segment according to the present invention, as described in claim 2, a bolt member extending in the circumferential direction of the tunnel is provided on the second segment body, and the bolt member is provided. And the deforming means may be provided on the bolt member. (Operation / Effect) As described above, by providing the bolt member extending in the tunnel circumferential direction on the second segment main body and providing the bolt member with the deforming means, the second connecting portion can be manufactured very easily. And the need for forming a dovetail groove in the second segment body as in the prior art is eliminated.
The weight of the segment body can be reduced. Also, if the second segment body is pushed in, the engaging piece is pushed in,
The pushing position when pushing the second segment main body is not particularly limited, and the pushing operation becomes simple. Furthermore, regardless of the manufacturing error of the first connecting portion and the second connecting portion,
When the second segment main body is pushed, a substantially constant attractive force can be generated between the first segment main body and the second segment main body by the deformation of the deformable member, so that the connection between the segment main bodies is reliably performed. be able to.

(Structure 3) As described in claim 3, the connecting portion of the tunnel segment according to the present invention is configured such that the deforming means is a cylindrical member that is plastically deformed by receiving an external force along the tunnel circumferential direction. Can be. (Operation / Effect) If a cylindrical member which is plastically deformed is provided as in the present configuration, regardless of a manufacturing error of the first connecting portion and the second connecting portion, when the second segment main body is pushed in, the first cylindrical portion is deformed by the deformation of the cylindrical member. Since a substantially constant attractive force can be generated between the first segment main body and the second segment main body, the connection between the segment main bodies can be reliably performed.

(Structure 4) In the connecting portion of the tunnel segment according to the present invention, as described in claim 4, the deforming means undergoes elastic compressive deformation or elastic tensile deformation by receiving an external force along the tunnel circumferential direction. It can be constituted by a spring member. (Operation / Effect) By providing the spring member as described above, it is possible to surely secure the attraction force of the connecting portion and obtain a connecting portion having sufficient strength. That is, in a spring member that undergoes compression deformation, a substantially proportional relationship holds between the load required for compression and the amount of deformation of the spring member. Therefore, before pushing in the second segment main body, the distance between the first butting surface and the engagement surface is adjusted by adjusting the first nut member or the second nut member in advance, so that the second segment is The amount of deformation of the spring member in a state where the pushing is completed can be set. By setting the attractive force generated by the deformation to be equal to or greater than the attractive force to be generated between the first segment main body and the second segment main body,
A connecting portion having sufficient strength can be obtained. Also,
By generating an attraction force more than necessary, even if the attraction force between the first segment main body and the second segment main body decreases after the connection is completed, the spring member It is possible to compensate for the decrease in the attraction force by the restoring force.

(Structure 5) In the connecting portion of the tunnel segment according to the present invention, as in claim 5, the first connecting portion is provided with the pair of engaged surfaces that are radially adjacent to the tunnel. The second connecting portion may be configured by providing a pair of the engaging surfaces that are adjacent in the radial direction of the tunnel. (Operation / Effect) As in the present configuration, if the engaged surface and the engaging surface are provided at two places each, the bending force acting between the first segment main body and the second segment main body can be effectively reduced. The connection portion can be formed firmly.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Outline) FIG. 1 shows an outline of a connecting portion of a tunnel segment according to the present invention. In the present embodiment, the second segment main body S2 is compared with the first segment main body S1 already constructed.
Are connected adjacently in the tunnel circumferential direction X. In the present embodiment, an example is shown in which the first segment main body S1 and the second segment main body S2 are ductile segments. However, the connecting portion according to the present invention is also applicable to, for example, a ductile segment or a concrete segment.

The first segment main body S1 and the second segment main body S2 are connected with the first butting surface F1 of the first segment main body S1 and the second butting surface F2 of the second segment main body S2 abutting each other. You. this house,
A first connecting portion R1 is provided near the first butting surface F1, and a second connecting portion R2 is provided near the second butting surface F2. First segment body S1 and second segment body S2
Can be connected by bringing the second butting surface F2 close to the first butting surface F1 and pushing the second segment main body S2 inward along the longitudinal direction Y of the tunnel. In this case, the first segment main body S1 and the second segment main body S2 are connected by the first connecting portion R1 and the second connecting portion R2 engaging and attracting each other.

(First Connecting Portion) In the first abutting surface F1, first connecting portions R1 are provided near both ends along the tunnel longitudinal direction Y, respectively. As shown in FIG. 1, the first connecting portion R1 extends along the tunnel longitudinal direction Y along with the first connecting portion R1.
A slit 1 formed on the butting surface F1 and the slit 1
And the engaged surfaces 2 formed on both sides of the front end. The slit 1 communicates with an end face of the end face of the first segment body S1 at both ends along the longitudinal direction Y of the tunnel. In this case, the engaged surface 2 is located behind the first butting surface F1. The engaged surface 2 is
It is inclined in the tunnel circumferential direction X with respect to the pushing direction y of the second segment main body S2. That is, the thickness between the first abutting surface F1 and the engaged surface 2 is configured to be thicker toward the back in the pushing direction y.

Since the segment body according to the present embodiment is a ductile segment, such a slit 1 and an inclined engaged surface 2 can be easily formed at the time of casting. Therefore, the processing of the first connecting portion R1 can be performed extremely easily, and the weight of the segment main body can be reduced as compared with the case where the conventional dovetail portion is formed.

(Second Connecting Portion) As shown in FIGS. 1 and 2, the second connecting portion R2 is provided with a bolt member 3 projecting from the second butting surface F2, and is connected to the bolt member 3. The joint piece 4 is attached. The engagement piece 4
Is provided with an engaging surface 5 which can be engaged with the engaged surface 2. Specifically, the bolt member 3 is provided at the end S2a of the second segment main body S2 forming the second butting surface F2.
It is attached through. The through-hole 6 formed at the end S2a is a mere hole, and does not have a female screw portion or the like. Therefore, the bolt member 3 inserted through the through hole 6
Can move back and forth with respect to the through hole 6. However, in this case, the inside diameter of the through hole 6 is
Is formed substantially in the same manner as the outer diameter of the above. If the inner diameter of the through hole 6 is too large with respect to the outer diameter of the bolt member 3, when the second segment main body S2 is pushed in, the bolt member 3 and the engaging piece 4 move in the pushing direction y. This is because the user falls down backward and cannot perform a proper pushing operation.

The first of the two ends of the bolt member 3
A deforming means H is extrapolated to the end located on the back side of the butting surface F1 as shown in FIG. The deforming means H in this case is, for example, a cylindrical member H1 having a substantially cylindrical shape,
The bolt member 3 is movable along the tunnel circumferential direction X with respect to the cylindrical member H1. If the bolt member 3 has no head, for example, it can be easily attached to the second segment main body. In this case, from the outside of the second segment body S2, the second segment body S
After the bolt member 3 is inserted toward the inside of the bolt member 2 and further inserted through the cylindrical member H1, the first end of the bolt member 3 is
The nut member 7 is screwed. With this configuration, it is not necessary to form an unnecessarily large bolt pocket inside the second segment main body S2. The tubular member H1 can be deformed by receiving an external force along the circumferential direction X of the tunnel, and its deformation mode will be described later.

The other end of the bolt member 3 is penetrated by the engaging piece 4, and a second nut member 8 is screwed to the protruding end. That is, by operating the first nut member 7 and the second nut member 8, the distance between the first butting surface F1 and the engaging surface 5 is adjusted prior to the pushing of the second segment body S2. can do. According to this configuration, when the segment body is cast, the through hole 6 can be formed together, and the bolt member 3 can be a mass-produced product. Can be configured.
In the present embodiment, an example is shown in which a double-ended bolt is used as the bolt member 3, but a bolt having a normal bolt head may be used.

In this embodiment, one engagement piece 4 is supported by two bolt members 3. Position adjustment of the first nut member 7 and the second nut member 8 relating to each bolt member 3 is appropriately set according to the thickness of the engaged surface 2 and the first butting surface F1. For example, by setting the distance between the engagement surface 5 and the second butting surface F2 slightly smaller than the distance between the engaged surface 2 and the first butting surface F1, the second segment body S
When the user 2 is pushed in, a predetermined attractive force can be generated.

As described above, the second connecting portion R2 of the present configuration is extremely simple, and its processing is also easy. Since the distance between the engaging surface 5 and the second butting surface F2 can be adjusted prior to the pushing of the second segment main body S2, the first segment main body S1 or the second segment main body S2, the engaging piece 4, etc. Even if there are manufacturing errors, the influence of these manufacturing errors can be eliminated by the first nut member 7 and the like, and a predetermined attractive force can be generated. Further, according to this configuration, the first segment main body S1
As in the case of (1), it is not necessary to form a dovetail groove in the second segment body S2, so that the weight of the second segment body S2 can be reduced.

As shown in FIG. 1, the engaging piece 4 has a second end so that the front end of the engaging piece 4 is retracted further in the pushing direction y than the end of the second segment body S2. It is attached to the segment body S2. Therefore, when the second segment main body S2 is pushed in by, for example, the pushing means J provided in the tunnel shield, the pushing means J pushes the end face of the end face of the second segment main body S2 which faces forward in the tunnel excavation direction. Only the position of the engagement piece 4 need not be considered. As a result, the position of the pushing means J is not restricted, and the pushing operation can be simplified as compared with the case where the conventional connecting portion is provided.

(Connecting Operation) When the second segment main body S2 is pushed into the first segment main body S1 that has already been constructed, the second segment main body S2 is pressed so that the engaging surface 5 comes into contact with the engaged surface 2. The two-segment body S2 is brought close to the first-segment body S1. At this time, the bolt member 3 is positioned so as to be inserted into the slit 1 of the first connecting portion R1. That is, when the second segment main body S2 is pushed in, after the bolt member 3 is inserted into the slit 1, the slit 1 serves as a guide portion, so that the second segment main body S2 can be pushed in smoothly. The distance between the engaging surface 5 and the second abutting surface F2 is determined by the distance between the first abutting surface F1 and the engaged surface 2 so that a predetermined deformation can be generated in the cylindrical member H1. Is set to be smaller than

FIG. 2 shows an operation mode of the cylindrical member H1.
FIG. 2A shows a state in which the engagement surface 5 and the engaged surface 2 are in contact with each other by pushing the second segment main body S2. When the second segment main body S2 is further pushed in from this state,
A compressive force acts on the tubular member H1, and the engaging piece is pushed in while increasing the amount of elastic compressive deformation of the tubular member H1. At this stage, since the compressive force is within the elastic limit of the cylindrical member H1, the cylindrical member H1 is simply elastically deformed.
No noticeable deformation occurs. However, when the second segment main body S2 is further pushed in, the compressive force increases beyond the elastic limit of the tubular member H1, and the tubular member H1 undergoes bending deformation, which is plastic deformation. Thereafter, the amount of bending deformation continues to increase as the second segment body S2 is pushed, and the state shown in FIG. 2B is reached, and the pushing of the second segment body S2 ends.

In the connecting portion of the present invention, since the cylindrical member H1 is provided, when the second segment main body S2 is pushed in, a certain amount of attraction is provided between the engaged surface 2 and the engaging surface 5 at the time of pushing. Can generate force. FIG. 3 shows the compression deformation characteristics of the tubular member H1. When the cylindrical member H1 is compressed in the axial direction, the cylindrical member H1 is elastically deformed in the initial stage from the origin 0 to the point a. When the compression load P reaches the point a, the cylindrical member H1
Begins to generate out-of-plane deformation accompanied by plastic deformation. Thereafter, as shown from the point a to the point b, even if the pressing is continued for a while, the load P applied to the cylindrical member H1 does not increase and only the out-of-plane deformation proceeds. When the point b is reached, the out-of-plane deformation turns into buckling, and the load P applied to the cylindrical member H1 decreases slightly to the point c. At a point c, the deformation of the tubular member H1 is substantially finished,
Thereafter, even if the pressing is continued, no compression deformation occurs, and only the load P increases. In the present embodiment, among the deformation characteristics of the tubular member H1, the characteristics from the point a to the point b are used.
That is, within this range, the second segment body S
This is because a certain load is generated on the tubular member H1 when the cylinder 2 is pushed in, that is, the attraction force generated between the engagement surface 5 and the engaged surface 2 is also kept constant.

As described above, when the cylindrical member H1 is used, for example, the error in the interval between the second abutting surface F2 and the engaging surface 5 is limited to the range of the stroke from the point a to the point b in FIG. Within the range, the first segment main body S1 and the second segment main body S2 can be connected with a predetermined attractive force. According to this configuration, the processing error of the first connecting portion R1 or the second connecting portion R2 can be absorbed in a wide range.
The labor for manufacturing the first connecting portion R1 and the like can be greatly reduced.

The cylindrical member H1 can be formed of a material which is relatively easily deformed, such as aluminum, copper, lead, or a thin steel material. That is, since the plastic deformation ability is stable with these materials, it is possible to easily obtain the cylindrical member H1 having a desired deformation property.

(Effects) As described above, the first connecting portion R1 and the second connecting portion R2 can be manufactured very easily as long as the connecting portion of the tunnel segment of this configuration is used. In addition, since it is not necessary to form a dovetail portion in the second segment body S2 as in the related art, the weight of the first segment body S1 and the second segment body S2 can be reduced. Also, the second segment body S
When the second piece 2 is pushed in, the engaging piece 4 is also pushed in, so that the pushing position when pushing in the second segment main body S2 is not particularly limited, and the pushing operation becomes simple. Further, the position of the engagement surface 5 can be adjusted prior to the pushing of the second segment main body S2 regardless of the manufacturing error of the first connecting part R1 and the second connecting part R2. An intended attraction force can be generated between the second segment main body S2 and the second segment main body S2. In addition, when the second segment main body S2 is pushed, a substantially constant attractive force can be generated between the first segment main body S1 and the second segment main body S2 due to the deformation of the cylindrical member H1. The connection between the main bodies can be performed more reliably.

[Another Embodiment] <1> The configuration of the second connecting portion R2 is not limited to the above configuration. For example, the configuration of the second connecting portion R2 between the engagement piece 4 and the second nut member 8 The cylindrical member H1 may be inserted. In short, any structure can be used as long as the cylindrical member H1 is plastically deformed when the second segment main body S2 is pushed in, so that the space between the second butting surface F2 and the engaging surface 5 is separated. Is also good.

For example, the end of the bolt member 3 is screwed to the end S2a of the second segment body S2, and the other end of the bolt member 3 is made to penetrate through the engaging piece 4, and then the end is inserted. In a configuration in which the tubular member H1 is attached to the portion, one end of the bolt member 3 is integrated with the end S2a of the second segment main body S2. Therefore, the second segment body S2
The bolt member 3 does not fall down when pushing
Since the posture of the engagement piece 4 is stabilized, the engagement surface 5 and the engaged surface 2
Can be smoothly engaged.

<2> In the above embodiment, the cylindrical member H1 is plastically deformed by receiving an external force along the tunnel circumferential direction X. However, the present invention is not limited to this configuration, and as shown in FIG. Alternatively, a spring member 9 that undergoes elastic compression deformation or elastic tension deformation by receiving an external force along the tunnel circumferential direction X may be used. Here, as in the above-described another embodiment <1>, the end of the bolt member 3 is screwed to the end S2a of the second segment main body S2, and the other end of the bolt member 3 is engaged. After penetrating the piece 4, the spring member 9 can be attached to the end. As the spring member, for example, a spring washer, a coil spring, or the like can be used.

In the case of this alternative embodiment, the spring member 9 undergoes compressive deformation, and a substantially proportional relationship is established between the required load and the amount of deformation of the spring member 9 at that time. Therefore, before pushing in the second segment main body S2, the distance between the first butting surface F1 and the engaging surface 5 is adjusted by adjusting the first nut member 7 or the second nut member 8 in advance. The amount of deformation of the spring member 9 in a state where the pushing of the second segment S2 has been completed can be set. By setting the attraction force generated by the deformation to be equal to or greater than the attraction force to be generated between the first segment main body S1 and the second segment main body S2, it is possible to obtain a connecting portion having sufficient strength. it can. In addition, by generating an unnecessarily large attraction force, even if the attraction force between the first segment main body S1 and the second segment main body S2 is reduced after the connection is completed, it may occur. The restoring force of the spring member 9 makes it possible to compensate for the decrease in the attraction force. As described above, in the case of this another embodiment, the dovetail groove portion and the like are formed in the first segment body S1 and the second segment body S2 while facilitating the processing of the first connection portion R1 and the second connection portion R2. This makes it unnecessary to reduce the weight of these segment bodies. And the engagement piece 4 is the second segment main body S
2 and the second segment body S2
When pushing in, the position and the like of the pushing means J are not limited, and the pushing operation becomes easy. In addition, it is possible to reliably secure the attraction force of the connecting portion, and to obtain a connecting portion having sufficient strength.

<3> In the above embodiment, the engaging surface 5 and the engaged surface 2 are provided one by one in the tunnel radial direction Z in both the first connecting portion R1 and the second connecting portion R2. However, as shown in FIG. 5, the engaging surface 5 and the engaged surface 2 may be provided at two places in the same direction. With this configuration, it is possible to effectively oppose the bending force acting between the first segment main body S1 and the second segment main body S2, and a strong connecting portion can be obtained.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a connecting portion of a tunnel segment according to the present invention.

FIG. 2 is an explanatory view showing a connection mode of a connection unit.

FIG. 3 is an explanatory view showing a compression deformation characteristic of a cylindrical member H1.

FIG. 4 is an explanatory view showing a connection mode of a connection section according to another embodiment.

FIG. 5 is a perspective view showing an outline of a connecting portion of a tunnel segment according to another embodiment.

FIG. 6 is a perspective view showing an outline of a connecting portion of a tunnel segment according to a conventional technique.

[Description of Signs] 2 Engaged surface 3 Bolt member 4 Engagement piece 5 Engagement surface 9 Spring member F1 First butting surface F2 Second butting surface H Deformation means R1 First connecting portion R2 Second connecting portion S1 First Segment body S2 Second segment body X Tunnel circumferential direction Y Tunnel longitudinal direction y Push direction

Claims (5)

[Claims] 1. The first segment body (S
The first segment main body (S1) and the second segment main body (S2) in a state where the second butting surface (F2) of the second segment main body (S2) is in contact with the first butting surface (F1) of (1). ) In the circumferential direction (X) of the tunnel to form a tunnel wall, a first connecting portion (R1) near the first butting surface (F1).
Is provided, and a second connecting portion (R2) is provided near the second butting surface (F2). The second segment body (S2) is arranged in the tunnel longitudinal direction (Y) with respect to the first segment body (S1). By pushing it from the near side to the far side along the first connecting portion (R1).
And the second connecting portion (R2) engages and attracts each other to connect the first segment main body (S1) and the second segment main body (S2). Both are inclined in the tunnel circumferential direction (X) with respect to the pushing direction (y) of the second segment main body (S2), and the engaging surface (5) and the engaged surface (2) are engageable with each other. ) With the second connecting portion (R2) and the first connecting portion (R1).
When the second segment body (S2) is pushed in and the engaging surface (5) and the engaged surface (2) attract each other, the engaging surface (5) and the Deformation means (H) is provided which is deformable by receiving an external force along the direction (X) so that at least one of the engagement surfaces (2) can move along the tunnel circumferential direction (X). Connection of tunnel segments. 2. A bolt member (3) extending in the tunnel circumferential direction (X) is provided on the second segment body (S2), and an engaging piece (4) supported by the bolt member (3) is provided. 2), wherein said engaging surface (5) is provided and said deforming means (H) is provided on said bolt member (3). 3. The connecting portion of a tunnel segment according to claim 2, wherein the deforming means (H) is a cylindrical member (H1) that undergoes plastic deformation by receiving an external force along the tunnel circumferential direction (X). 4. The tunnel for a tunnel according to claim 2, wherein said deforming means (H) is a spring member (9) which undergoes elastic compression deformation or elastic tension deformation by receiving an external force along said tunnel circumferential direction (X). Segment connection. 5. A pair of engaged surfaces (2) adjacent to the first connecting portion (R1) in a radial direction (Z) of the tunnel.
5. The method according to claim 1, wherein a pair of the engagement surfaces (5) adjacent in a radial direction (Z) of the tunnel are provided in the second connecting portion (R <b> 2). 6. Connection of tunnel segments.