JPH11294088A - Segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment capable of achieving the joining work in an extremely easy manner, and simultaneously being joined in both the axial direction and the circumferential direction, and easy in automation of the assembly. SOLUTION: In a segment 1, elastically deformable fitting parts 4, 5 are projected in a pin-like manner on a joining end face 3 in the axial direction of a tunnel wall body, and fitting holes 7a, 7b, 8a, 8b in which the fitting parts 4, 5 can be inserted are opened in another joining end face 6 in the axial direction opposite to the joining end face 3. Segments are joined with each other by fitting the fitting parts 4, 5 inserted in the fitting holes 7a, 7b, 8a, 8b into the fitting holes 7a, 7b, 8a, 8b in an elastically deforming manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment for constructing a tunnel wall in the axial direction of an excavation hole by interconnecting the segments.

[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 cylindrical wall (tunnel wall) is constructed by assembling segments (mainly made of concrete or steel) on the inner surface side of an excavation hole. It is a target. As the segments used in the shield method, those having a rectangular shape in a plan view and an arc plate shape are mainly used, and these segments are joined together by bolts. As a structure for joining the segments with the bolts, joints having holes communicating with each other when the joining surfaces of the segments are brought into contact with each other are buried in the vicinity of the joining surfaces of the segments. In general, a structure is used in which a bolt is inserted into a hole and a nut is fastened to the bolt, so that the joining surfaces of the segments are in contact with each other so that the portions communicate with each other. 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.

[0003]

However, in the above structure, a bolt is inserted into a hole formed in a joint surface of a joint at a construction site, and a nut is fastened to the bolt or embedded in a mutual segment. Since an extremely complicated operation of fastening bolts to the insert fittings is required, there is a limit in shortening the assembling time, and adaptation to automatic assembling by a robot has been difficult. The fastening operation of the bolt needs to be performed for both the joining of the segments in the axial direction and the joining of the segments in the circumferential direction, and the joining of one segment requires many man-hours. In addition, the difference in the fastening operation direction between the joining in the axial direction and the joining in the circumferential direction has also made adaptation to automatic assembly difficult. Furthermore, even if the secondary lining is omitted, the bolt box formed in the segment must be closed in order to install the bolts and nuts. At the present time, the development of joining technology was urgently needed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and the joining operation can be performed extremely easily. In addition, the joining operation in the axial direction allows simultaneous joining in both the axial direction and the circumferential direction. It is an object of the present invention to provide a segment which can be easily assembled.

[0005]

According to the first aspect of the present invention, a segment forming a tunnel wall by being joined with their joining end surfaces being aligned with each other, wherein the segment is a shaft of the tunnel wall. On the joint end face in the direction, a resiliently deformable mounting component is projected in the form of a pin, and in another axial joint end face facing the joint end face, a fitting hole in which the mounting component can be inserted is opened. The segments are characterized in that the mounting components inserted into the fitting holes are joined together by elastically deforming and fitting in the fitting holes, whereby the segments are joined to each other. This segment is easily joined in the axial direction by pressing against the joint end surface of the mating segment and inserting the fitting protruding from the joint end surface in the axial direction into the fitting hole and fitting. Can be. Since the mounting part inserted into the fitting hole of the mating segment and fitted is fixed to both segments joined to each other in the axial direction, not only the fixing in the axial direction between the joining end faces, Also exerts fixing force in the circumferential direction. Thus, the segments are joined only in the axial direction, and are joined in two directions, the axial direction and the circumferential direction.

According to a second aspect of the present invention, in the segment according to the first aspect, the mounting component is fitted into a fitting hole opened in the joining end face before joining, so that the fitting part projects into the joining end face. It is characterized in that it can be attached. In this segment, it is possible to insert the fittings selected in consideration of the shape of the segment to be joined etc. into the fitting holes opened in the joining end face of the segment before joining, and then join before joining Therefore, versatility can be improved.

[0007] The invention described in claim 3 is claim 1 or 2.
In the described segment, a mounting component attached to a central portion of the joint end face is projected into a pin shape from the joint end face, and inserted into a fitting hole formed in each of the segments that are joined in a circumferential direction to each other in advance, The two insertion portions to be fitted are connected by a connection portion. In this segment, the two insertion portions of the mounting component are inserted and fitted into fitting holes formed in each of the segments that have been joined in the circumferential direction in advance, thereby joining the segments in the circumferential direction. Force can be ensured by this fitting. In addition, by inserting and inserting the insertion portion into the fitting hole of the segment in the joined state in advance and fitting and fixing the mounting component, the bonding force between the three segments in total is secured by the mounting component. Can improve the strength of the tunnel wall constructed.

[0008]

FIG. 1 is a perspective view showing an example of a tunnel wall 2 constructed by a segment 1. In FIG. 1, a segment 1 is formed in an arc plate shape from concrete, and is joined in a circumferential direction and an axial direction to form a tunnel wall 2 of a cylindrical wall. In the drawings, the imaginary line X is the axial direction, and the circumference of the imaginary line X is the circumferential direction.

An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a plan view showing the tunnel wall 2, and FIG. 3 is a view of the tunnel wall 2 as viewed from the axial direction. 2 and 3, the segment 1 has attachment parts 4 and 5 projecting from one joint end face 3 in the axial direction, and the fitting part 4 is inserted and fitted into the other joint end face 6 in the axial direction. Fitting holes 8a and 8b, and fitting holes 7a and 7b into which the attachment components 5 are inserted and fitted. The segment 1 is formed by joining its joint end face 3 to the assembled segment 1 (in FIGS. 2 and 3, for convenience of explanation,
a, 1b) is pressed in the axial direction toward the joint end face 6 to insert the fitting 4 into the fitting holes 8a, 8b, fit the fitting, and insert the fitting 5 into the fitting hole. It is joined by inserting and fitting into 7a, 7b.

FIG. 4 shows a mounting part 4 projecting from the center of the joint end face 3. In FIG. 4, this mounting part 4 is
The whole is formed of a spring material, and has an H shape in which a pair of insertion portions 4a and 4b curved in an arc shape are connected by a connection portion 4c. The insertion portions 4a and 4b have the largest separation distance near the connection portion 4c, and are curved so as to approach each other as the insertion portions 4a and 4b move away from the connection portion 4c. In FIG. 2, the mounting components 5 projecting from opposite ends of the joint end surface 3 are entirely formed by bending a spring material into an arcuate pin shape.

When connecting the segment 1 to another segment, the mounting components 4 and 5 are attached to the joining end face 3 of the segment 1 in a protruding state in advance. The mounting part 4 is
A pair of fitting holes 9a and 9b opened at the center of the joint end face 3
By inserting and fitting about half the length of the insertion portions 4a and 4b, the projections are attached in a protruding state. When the insertion portions 4a, 4b are inserted and fitted into the fitting holes 9a, 9b, the connecting part 4c abuts on the joint end surface 3, whereby the mounting component 4 is positioned on the joint end surface 3. The mounting part 5 is inserted into fitting holes 10a and 10b opened on both sides of the joint end face 3 facing each other, fitted and fitted in a protruding state.

When the insertion parts 4a, 4b are inserted into the fitting holes 9a, 9b, the attachment part 4 is formed at the deepest side of the fitting holes 9a, 9b (the back side in the insertion direction of the insertion parts 4a, 4b). The engagement recesses 11a, 11b are engaged with the engagement portions 4d, 4d at the tips of the insertion portions 4a, 4b, respectively, so that the fitting holes 9a,
9b is restricted. FIG.
2 shows a process of inserting and fitting the insertion portion 4b into the fitting hole 9b.
In FIG. 5, a fitting hole 9b is provided with an engagement portion 4d of the insertion portion 4b.
The insertion portion 4b is smoothly inserted into the fitting hole 9b by the tapered portion 9c near the opening of the fitting hole 9b. The insertion portion 4b inserted into the fitting hole 9b initially has an engagement portion 4d and an outer surface 4f of the insertion portion 4b.
Are slightly elastically deformed by being brought into contact with the inner surfaces on both sides of the fitting hole 9b opposite to each other, and are linearly deformed from a curved state. Then, when the insertion is continued, the engaging portion 4d enters the engaging concave portion 11b to be engaged and fitted. At this time, since the abutting state of the outer surface 4f of the insertion portion against the inner surface of the fitting hole 9b is maintained, the elasticity of the insertion portion 4b maintains the state in which the engagement portion 4d is pressed by the engagement recessed portion 11b. The state is not released, whereby the insertion portion 4b fits into the fitting hole 9b. Also, at the same time when the engaging portion 4d enters and engages with the engaging concave portion 11b, the insertion portion 4b returns from a state close to a straight line to a curved state, and the distance from the connecting portion 4c to the engaging portion 4d is slightly reduced. Thereby, the connecting portion 4c is brought into pressure contact with the joining end face 3, and the inserting portion 4b is stably fixed without shaking. The insertion and fitting of the insertion portion 4a into the fitting hole 9a are the same as those of the insertion portion 4b.

The insertion parts 4a, 4b on both sides of the mounting part 4
By being inserted and fitted into the fitting holes 9a, 9b at the same time, the intermediate wall 12 between the fitting holes 9a, 9b is sandwiched from both sides and fitted, so that the respective insertion portions 4a, 4b are fitted into the fitting holes 9a, 9b. The state of being fitted and fixed to 9b is more reliably maintained. When the insertion and fitting of the two insertion portions 4a and 4b are completed, the attachment component 4 is fixed in a protruding state at the target position on the joint end surface 3. In addition,
Here, since the connecting portion 4c is in contact with the joint end surface 3,
As a result, the dimensions of the insertion portions 4a and 4b to be inserted into the fitting holes 7a and 7b and the size of the protrusion from the joint end surface 3 are set.
From the joint end face 3, insertion portions 4a and 4b having a desired length are projected in a pin shape.

The insertion and fitting of the mounting part 5 into the fitting holes 10a and 10b are the same as the fitting of the insertion parts 4a and 4b of the mounting part 4 into the fitting holes 9a and 9b. That is, the fitting part 5 is inserted into the fitting holes 10a and 10b while elastically deforming the curved state linearly, and is formed on the innermost side of the fitting holes 10a and 10b (the inner side in the insertion direction of the fitting part 5). By engaging the engaging portion 5a at the tip of the mounting component 5 with the engaging concave portions 13a, 13b, the fitting portions 10a, 10b are fitted and fixed in the fitting holes 10a, 10b, and pulling out is restricted. In addition, the length of the mounting part 5 is approximately half that of the fitting hole 10a, 10b.
, And the remaining half of the length protrudes from the joint end face 3.

On the other hand, a fitting hole 7 at a central portion on the side of the joint end face 6 is provided.
Attachments 5a and 7b are adapted to be inserted and fitted with attachment parts 5 attached to the joint end face 3 of another segment 1 in a protruding state. The mounting component 5 inserted into the fitting holes 7a and 7b is fitted and fixed in the fitting holes 7a and 7b in the same manner as the insertion and fitting into the fitting holes 10a and 10b. That is, the fitting part 5 is inserted into the fitting holes 7a, 7b while elastically deforming the curved state linearly, so that the engaging part 5b at the tip is formed at the deepest side of the fitting holes 7a, 7b. By being engaged with the engagement recesses 14a, 14b thus formed, the pull-out is restricted, and is fitted and fixed in the fitting holes 7a, 7b. Further, since the fitting holes 7a and 7b are communicated with the reinforcing plate 15 fixed near the joint end surface 6, the mounting parts 5 and 5 inserted into the fitting holes 7a and 7b are separated from each other by the reinforcing plate 15. Not to be restrained.

An insertion portion 4b of a mounting component 4 attached to the joining end surface 3 of another segment 1 in a protruding state is inserted and fitted into a fitting hole 8a at one end of the joining end surface 6, and the other end portion is fitted. The insertion portion 4a of the mounting component 4 is inserted into the fitting hole 8b,
Mated. Insertion part 4a or 4 into fitting hole 8a, 8b
Insertion and fitting of b are performed in the same manner as insertion and fitting into the fitting holes 9a and 9b. That is, the insertion portions 4a and 4b are elastically deformed so that the insertion holes 4a and 4b are linearly changed from the curved state, and the fitting holes 8 are formed.
a, 8b, and the engaging portion 5b at the tip thereof is engaged with the engaging concave portions 17a, 17 formed at the deepest side of the fitting holes 8a, 8b.
7b, and this engaged state is maintained by the elastic force of the mounting part 5 itself, and is fitted and fixed in the fitting holes 8a, 8b. Each of the fitting holes 8a and 8b has a plate storage portion 16a or 16b in the vicinity of the joint end face 6 for storing about half of the reinforcing plate 15 of the mounting component 4. When the segments 1 are joined in the circumferential direction, the adjacent fitting holes 9a,
The plate storage portions 16a and 16b of 9b are continuously formed to receive the reinforcing plate 15.

In order to construct the tubular tunnel wall by joining the segments 1 in the axial direction and the circumferential direction, first, the joining end face 3 is first added to the previously assembled segment 1.
The segments 1 to which the attachment parts 4 and 5 are attached in a protruding state are joined so as to be pressed in the axial direction. That is, the segment 1 joined to the existing segment 1
Before the joining, the fitting holes 9 opening in the joining end face 3 are set in advance.
a, 9b, the fitting 4 is fitted and fixed, and the fitting holes 10a, 1b,
Attachment parts 5 are fitted and fixed to Ob, and attachment parts 4 and 5 are attached in a protruding state from the joint end face 3, respectively. Next, the segment 1 in which the attachment parts 4 and 5 have been attached is completed.
The central portion of the joint end face 3 is positioned and pressed on the joint boundary of the existing segments 1 and 1 (hereinafter referred to as segments 1a and 1b for convenience of description) joined in the circumferential direction. The projecting portion of the fitting part 5 inserted and fitted into the fitting hole 10a of the segment 1 from the joint end face 3 is inserted and fitted into a fitting hole 7b opened at the center of the joint end face 6 of the segment 1a. , Segment 1 fitting hole 10b
The projecting portion of the fitting part 5 inserted and fitted from the joint end face 3 is inserted and fitted into a fitting hole 7a opened at the center of the joint end face 6 of the segment 1b.

Also, the two insertion portions 4a and 4b of the mounting part 4 mounted to the segment
In the vicinity of the joining boundary between a and 1b, they are collectively inserted and fitted into a pair of fitting holes 10b and 10a arranged close to each other.
More specifically, the insertion portion 4a is inserted into the fitting hole 10 of the segment 1a.
b, and the insertion portion 4b is inserted and fitted into the fitting hole 10a of the segment 1b. Further, between the segments 1a and 1b joined in the circumferential direction, the plate storage portions 16b and 16a of the fitting holes 10b and 10a are continuous, so that
The reinforcing plate 15 of the mounting part 4 is housed and fitted into the plate housings 16b and 16a. As a result, the fittings 4 and 5 are inserted into the fitting holes 9b and 10 of the segments 1a and 1b.
The segments 1 are joined to the segments 1a and 1b by fitting and fixing to the segments 10a and 9a.

The mounting parts 4 and 5 have an engaging part 4 at the tip thereof.
e, 5b are the fitting holes 9b, 1
0b, 10a, 9a engagement recesses 14b, 17b, 17
at the same time as engaging with the fitting holes 9b, 14a.
Since the length of insertion into the b, 10a and 9a is slightly shortened, a pressing force is applied between the joining end surfaces 3 and 6 of the segments 1, 1a and 1b, and an axial joining force is obtained. In addition, since the attachment parts 4 and 5 are in communication with the segments 1, 1 a and 1 b joined in the axial direction, the displacement of the segments 1 joined to the segments 1 a and 1 b in the circumferential direction is also restricted. Thus, segment 1
Joined in both axial and circumferential directions.

Moreover, the two insertion portions 4a, 4b connected by the connection portion 4c of the mounting part 4 are inserted and fitted into the fitting holes 10b, 10a of the segments 1a, 1b joined in the circumferential direction. , 1b are connected by the attachment part 4, and the joining force between the segments 1a, 1b is improved. At this time, the connecting portion 4c of the mounting part 4
Bears a stress, so that a high joining force can be obtained between the segments 1a and 1b.

In the fitting hole 7a in the vicinity of the fitting hole 7b of the segment 1a, a fitting part 5 attached to the joining end face 3 of another segment 1c connected in the circumferential direction of the segment 1 in a protruding state is inserted and fitted. Is done. In the segment 1a, the mounting part 5 of the segment 1 fitted and fixed in the fitting hole 7b and the mounting part 5 of the segment 1c fitted and fixed in the fitting hole 7a
Is constrained by the reinforcing plate 15, whereby a joining force is applied between the segments 1, 1c joined in the circumferential direction. Also in the segment 1b, similarly, by attaching the fitting parts 5, 5 inserted and fitted in the fitting holes 7a, 7b with the reinforcing plate 15, a joining force can be given between the segments joined in the circumferential direction. it can. In addition, since the stress acting from the attachment component 5 is dispersed and transmitted to the wide range of the segments 1a and 1b by the reinforcing plate 15, sufficient strength can be secured near the fitting holes 10a and 10b.

Thus, according to this segment 1,
The other segment 1a to which the attachment parts 4 and 5 are joined,
By simply inserting and fitting into the fitting holes 7b, 8b, 8a, 7b of 1b, it can be fixed in both the axial direction and the circumferential direction, so that the tubular tunnel wall 2 can be constructed in a short time. Can be. Further, since the segments 1 can be joined only by the operation in the axial direction, the joining operation is extremely simple, and automation is easy. Further, before the joining operation, the fitting holes 9a, 9b, 10
Since the joining work is performed after fitting the attachment parts 4 and 5 to the a and 10b in advance, the fitting of the existing segments 1a and 1b can be performed by selectively using the attachment parts 4 and 5. It is possible to easily cope with a hole shape, a joining angle, an error correction, and the like. Since the fittings 4 and 5 can be fitted into the fitting holes 9a, 9b, 10a and 10b even near the site, the selection of the fitting to be used can be flexibly adapted to the actual joining work situation. It can be carried out.

In the above-described embodiment, the concrete segment has been described. However, the present invention is not limited to this. The present invention is applicable to segments having various structures such as a steel frame and a skin plate. The attachment component is not limited to the above embodiment, and various configurations can be adopted. For example, the material of the attachment component is not limited to a spring material, but may be a resin or the like. Various metals, castings, and the like can be used as the metal applied to the attachment part. It is also possible to separately provide a joint in the circumferential direction on the segment. In this case, a structure that can be joined only by the joining operation in the tunnel axial direction is adopted.

Instead of the mounting part 5, for example, FIGS.
The mounting parts 21 and 22 shown in FIG. The attachment part 21 shown in FIG. 5 is a spring body that connects two insertion parts 21a curved in a bow shape from a spring material and is formed so as to diverge toward both sides facing each other from the connection part 21b. Reference numeral 22 includes an insertion portion 22a in which both ends in the longitudinal direction of the steel pipe are divided into two. In applying any of the attachment parts 21 and 22, it goes without saying that the fitting hole opened in the joint end face of the segment is changed to a shape in which the attachment parts 21 and 22 can be inserted and fitted.

Further, in place of the mounting part 4, for example, mounting parts 23 and 24 shown in FIGS. 8 and 9 can be employed. The mounting part 23 shown in FIG. 8 includes an insertion part 23a configured in the same configuration as the mounting part 21 shown in FIG.
The mounting part 24 shown in FIG. 9 has a configuration similar to that of the mounting part 22 shown in FIG. 7 in that the insertion part 24a has the same configuration as the mounting part 22 shown in FIG. It is a configuration in which both sides are opposed to each other and connected. In applying any of the attachment parts 23 and 24, it goes without saying that the fitting hole opened in the joint end face of the segment is changed to a shape in which the attachment parts 23 and 24 can be inserted and fitted.

[0026]

As described above, according to the segment described in the first aspect, the segment is pressed in the axial direction of the tunnel wall,
By inserting and fitting a pin-shaped mounting component into a fitting hole opened in the joining end surface of the mating segment, it is possible to easily join in the axial direction. In addition, the mounting parts communicating with each other between the joined segments are fixed not only in the axial direction but also in the circumferential direction, so that the joining force in both the axial direction and the circumferential direction can be obtained simultaneously with the joining. In addition, since the joining can be performed by the joining operation only in the axial direction, a cylindrical tunnel wall body can be constructed by an extremely simple operation, and an excellent effect that the joining operation can be easily automated is achieved. .

According to the second aspect of the present invention, the segments can be joined to each other after the fittings are inserted and fitted in the fitting holes opened in the joining end surfaces of the segments before joining. In addition, it is possible to select and use an attachment component that is suitable for the shape of the segment to be joined and the like, and an excellent effect of improving the versatility of the segment is achieved.

According to the third aspect of the present invention, the attachment parts attached to the center of the joint end face are formed on the segments which project from the joint end face in the form of pins and are joined to each other in the circumferential direction in advance. Inserted into the fitting hole that has been inserted, the two insertion portions to be fitted are connected by a connecting portion, so that the insertion portion is inserted into a fitting hole formed in another two segments, respectively. By fitting, the two segments can be connected to each other to increase the joining force, and provide an excellent effect of improving the strength of the tunnel wall.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a tunnel wall assembled by a segment of the present invention.

FIG. 2 is a plan view showing a tunnel wall assembled by a segment according to an embodiment of the present invention.

FIG. 3 is a side view of the tunnel wall of FIG. 2 viewed from an axial direction.

FIG. 4 is a perspective view showing an example of a mounting component applied to the segment of FIG. 2;

FIG. 5 is a cross-sectional view showing the vicinity of the fitting hole, showing a process of inserting and fitting a mounting component into a fitting hole opened in the joint end surface of the segment.

FIG. 6 is a perspective view showing another embodiment of the mounting component applied to the segment of the present invention.

FIG. 7 is a perspective view showing another embodiment of a mounting component applied to the segment of the present invention.

FIG. 8 is a perspective view showing another embodiment of the attachment component applied to the segment of the present invention.

FIG. 9 is a perspective view showing another embodiment of the mounting component applied to the segment of the present invention.

[Explanation of symbols]

 1, 1a, 1b, 1c segment, 2 tunnel wall, 3 joining end face, 4, 5 mounting parts, 4a, 4b insertion part, 6 joining end face, 7a, 7b, 8a, 8b fitting hole, 9a, 9b, 10a , 10b fitting hole, 21 mounting part, 21a insertion part, 22 mounting part, 22a insertion part, 23 mounting part, 23a insertion part, 23b connection part, 24 mounting part, 24a insertion part, 24b connection part.

Claims (3)

[Claims] 1. A segment that forms a tunnel wall by being joined together with their joining end surfaces joined together, and is elastically deformable on an axially joining end surface of the tunnel wall. A component is protruded in a pin shape, and a fitting hole in which the mounting component can be inserted is opened in another axial bonding end surface facing the bonding end surface, and the mounting component inserted into the fitting hole is provided. Are joined to each other by being elastically deformed and fitted in the fitting hole. 2. The mounting part according to claim 1, wherein said fitting part is fitted in a fitting hole opened in a joining end face before joining, so as to be attached to said joining end face in a protruding state. 1 segment. 3. A mounting component attached to a central portion of the joint end face is projected in a pin shape from the joint end face, respectively.
The segment according to claim 1, wherein two insertion portions formed in each of the segments that have been joined to each other in the circumferential direction in advance are connected by a connection portion.