JP2000002091A - Junction structure of segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the junction structure of a segment, in which tensile resistance force can be ensured surely while the internal surface of a segment can be smoothed and joining works are also conducted simply in a short time. SOLUTION: In the junction structure 1, grooves 3 for junction, in which groove cross sections are opened, are utilized in a joint surface 2a in the tunnel direction of one segment 2, projecting sections 4 for junction of the other segment 2 are moved in the tunnel direction, groove 3 for junction and the projecting sections 4 for junction are fitted, and both segments 2 to be joined are connected. Accordingly, since junction can be conducted without requiring works in the direction between the segments, the internal surfaces of the segments 2 can be smoothed while joining works can be conducted simply in a short time. Parts of the grooves 3 for junction are constituted of the recessed sections 5a of female type joint fittings 5 while the projecting sections 4 for junction are configured of male type joint fittings 6 having projecting sections 6a fitted only to the recessed section 5a sections of the female type joint fittings 5, and stretching resistance force at the time of the working of internal water pressure, etc., is ensured surely by increasing the strength of the recessed and projecting joining sections.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure in the direction of inter-segment of each segment forming a segment ring in a segment ring for joining a plurality of pieces in a tunnel direction for lining a shield tunnel. .

[0002]

2. Description of the Related Art Conventionally, as a joining structure of this kind of segment, adjacent segments for forming a segment ring, that is, both joining plates provided on a joining surface of both segments to be joined are abutted with each other. It is generally known that both segments to be joined are joined by tightening the joining plates with a joining bolt penetrating the joining plates and a nut screwed to the joining bolt.

[0003]

Generally, when internal water pressure acts on a tunnel constructed by a shield method,
The segments that are the lining material have a reduced axial compression force or, in some cases, an axial tension force. Therefore, the joining portion of the segments needs to have a strong tensile resistance.

For this reason, in the above-described conventional joint structure, in order to improve the tensile resistance, the number of joint bolts is increased or the joint fittings (joint plates and joint bolts) themselves are made to have high rigidity. It was necessary and uneconomical.

Further, in the above-mentioned conventional joining structure, since a fastening operation with a joining bolt and a nut is required, the entire joining operation is troublesome and requires a lot of time. Further, a bolt box for tightening work for performing the tightening work is required on the inner surface of the segment, and in a tunnel where the secondary lining is omitted, a portion of the bolt box for tightening work is provided as a post-work. Filling work is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to ensure the pulling resistance during the operation of internal water pressure and the like, and eliminate the need for a bolt box for tightening work. It is an object of the present invention to provide a joining structure of segments that can make the joining smooth and can perform joining work easily and in a short time.

[0007]

Means for Solving the Problems The joining structure of the present invention comprises:
At the joint surface in the direction between the segments of one of the segments to be joined, while extending in the tunnel direction,
A joining groove formed with a groove cross section opened in the joining surface in the tunnel direction, and the other segment to be joined so that the joining groove can be inserted into the joining groove from the opening in the tunnel direction and fitted. And a joining projection provided on the joining surface in the inter-segment direction. Also,
A part of the joining groove is constituted by a concave portion of the female joint fitting, and the joining convex portion is constituted by a male joint fitting having a convex portion that fits only into the concave portion of the female joint fitting. . Then, when the concave portion of the female joint fitting and the convex portion of the male joint fitting are fitted, the entire joint surface in the direction between the segments in both segments to be joined is brought into contact.

According to such a joint structure of the present invention,
By using the joining groove whose groove cross section is open on the joining surface in the tunnel direction, it is possible to fit the joining groove and the joining protrusion simply by moving the joining protrusion in the tunnel direction. I can do it. In other words, without the need for work in the direction between segments without using joining bolts and the like,
The two segments to be joined can be joined. From this, in the joining structure of the present invention, the inner surface of the segment can be made smooth without the bolt box for fastening work, and the joining work can be performed easily and in a short time. I have to.

[0009] A part of the joint groove is formed by a concave portion of the female joint fitting, and the joint convex portion is a male mold having a convex portion that fits only into the concave portion of the female joint fitting. With the joint fitting, the strength of the uneven joint portion is improved, and the pulling resistance during the action of the internal water pressure or the like can be reliably ensured.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a joint structure of a segment according to the present invention.

In a segment ring (not shown) for joining a plurality of pieces in a tunnel direction for lining a shield tunnel, each segment 2 in the direction between the segments is used.
The joining structure 1 (see FIGS. 1 and 2) has a joining surface 2a in the inter-segment direction in one segment 2 to be joined.
A joining groove 3 extending in the tunnel direction and having a groove cross-section opened in a joining surface 2b in the tunnel direction, and an opening 3a extending in the tunnel direction into the joining groove 3. Surface 2a of the other segment 2 to be joined in the inter-segment direction so that it can be inserted and fitted.
And the joining protrusions 4 provided on the front side. A female joint fitting 5 having a concave portion 5a which becomes a part of the joining groove 3 is embedded in a joining surface 2a in the inter-segment direction of one segment 2 to be joined.
Is composed of a male fitting 6 having a convex portion 6a that fits only into the concave portion 5a of the female fitting 5.

As shown in FIG. 6, the joining grooves 3 in this embodiment are formed in two rows in parallel with a predetermined interval in the height direction of the joining surface 2a, and the sectional shape of the joining grooves is surface
A small opening 3b opening at 2a and a large groove body at the back
Consists of 3c. And these two joining grooves 3
The two female joint fittings 5 are provided at predetermined intervals in the longitudinal direction.
Is provided. The joining groove 3 may be formed in two rows in parallel with a predetermined interval in the height direction of the joining surface 2a. As shown in FIG. 7, the joining groove 3 may be substantially parallel to the height direction of the joining surface 2a. A form in which only one (one line) is formed at the center may be used.

As shown in FIG. 3, the female joint fitting 5 in this embodiment has a recess 5a having the same shape as the cross section of the joining groove 3. As shown in FIG.
And a filling hole communicating with the concave portion 5a.
It comprises a main body 5c having a substantially C-shaped cross section (see FIG. 3A) having 5b, and an anchor portion 5d fixing the main body 5c to the segment 2. The main body 5c here is shown in FIG.
As shown in (b), it extends a predetermined distance in the direction in which the joining groove 3 extends, and two anchor portions 5d are provided at predetermined intervals in the longitudinal direction. And this female joint fitting 5
As shown in FIG. 6, two joint grooves 3 are provided in each joint groove 3 on the joint surface 2a in the inter-segment direction in one segment 2.

As shown in FIG. 4, the joining projection 4 in this embodiment, that is, the male joint fitting 6 has a wide main body 6b fitted into the groove main body 3c of the joining groove 3 and a joining main body 6b. A convex portion 6a comprising a small-width connecting portion 6c fitted into the opening 3b of the groove 3;
The main body 6b (the convex portion 6a) is fixed to the segment 2 via the connecting portion 6b of the convex portion 6a. As shown in FIG. 4B, the projections 6a extend a predetermined distance in the direction in which the joining groove 3 extends, and two anchor portions 6d are provided at predetermined intervals in the longitudinal direction. . As shown in FIG. 5, the male joint fitting 6 has a joint surface 2a in the inter-segment direction of the other segment 2.
, Four are provided at positions corresponding to the female joint fittings 5.

The joining of the segments so as to form the segment ring by using the joining structure 1 having such a configuration is performed as follows.

First, the joining projection 4 provided on the joining surface 2a of the other segment 2, that is, the projection 6a of the male fitting 6 is provided.
Is inserted into the joining groove 3 formed in the joining surface 2a of the segment 2 in the inter-segment direction from the opening 3a opened in the joining surface 2b in the tunnel direction as shown in FIG. The joining groove 3 at this time serves as a guide for the convex portion 6a of the male fitting 6. As the role of the male fitting 6 at this time, it is expected that the segments will not fall down by 2 and a guide for the assembling work is expected.

Next, the convex portion 6a of the male fitting 6 inserted into the joining groove 3 of one segment 2 is moved along the joining groove 3, that is, the other segment 2 is moved. The joining surfaces 2b of both segments 2 to be joined are the same. At this time, the projection 6a of the male fitting 6 as the joining projection 4 fits only into the recess 5a of the female fitting 5. The concave portion 5a of the female fitting 5 and the convex portion 6a of the male fitting 6 inserted into the concave portion 5a are provided with a fitting clearance portion 7 in consideration of assembly and manufacturing errors during construction.
Is formed.

As described above, the convex portion 6a of the male joint fitting 6, which is the joining convex portion 4, is fitted only into the concave portion 5a of the female joint fitting 5, so that the segment between the two segments 2 to be joined can be formed. Joining in the direction is completed. Then, by repeating this joining operation, a segment ring (not shown) is constructed in each segment 2. When a tunnel (not shown) is constructed by joining a large number of these segment rings, the joining of each segment ring, that is,
The joining in the tunnel direction of each segment 2 is a pin-type joining using pins 8 as shown in FIGS.

When a tunnel is constructed with each segment 2 in this way, in order to cope with internal water pressure acting on the tunnel, the above-mentioned fitting clearance portion 7 is provided with a non-shrinkable material such as mortar or resin which is rich in fluidity. Filling material (not shown)
Fill. After filling each segment 2 under construction, the filling is applied to the entire tunnel by jack thrust and soil water pressure, and the above-mentioned filling is performed at the time when the ground is settled (a point behind the assembling point). This is performed for the fitting clearance portion 7. Then, when the internal water pressure is applied, the tensile resistance generated at the fitting portion between the concave portion 5a of the female fitting 5 and the convex portion 6a of the male fitting 6 is ensured. When this filler is injected into the fitting clearance portion 7, as shown in FIG. 1, a filler injection hole (air vent hole) 9 communicating with the filling hole 5b of the female joint fitting 5 is provided in the segment 2. To ensure reliable filling.

As described above, according to the joining structure 1 of the segments 2 according to the present invention, the joining groove 3 having a groove cross section opened at the joining surface 2a in the tunnel direction of one segment 2 is used. The joint groove 3 and the joint convex portion 4 can be fitted only by moving the joint convex portion 4 in the segment 2 in the tunnel direction. That is, the two segments 2 to be joined can be joined without the need for an operation between segments such as using joining bolts. Therefore, the inner surface of the segment 2 can be made smooth without the bolt box for tightening work, and the joining work can be performed easily and in a short time.

Further, a part of the joint groove 3 is constituted by the concave portion 5a of the female joint fitting 5, and the joint convex portion 4 is fitted only into the concave portion 5a of the female joint fitting 5. With the male fitting 6 having the convex portion 6a,
It is possible to improve the strength of the uneven joint portion, and it is possible to surely secure the tensile resistance during the operation such as the internal water pressure.

[0022]

According to the joining structure of the segments according to the present invention, the joining convex portion of the other segment is formed by utilizing the joining groove having the groove cross section opened at the joining surface in the tunnel direction of one segment. Just by moving in the tunnel direction, the joining groove and the joining protrusion can be fitted. That is, both segments to be joined can be joined without the need for work in the direction between segments such as using joining bolts. Therefore, the inner surface of the segment can be made smooth without the bolt box for fastening work, and the joining work can be performed easily and in a short time.

[0023] Further, a part of the joint groove is constituted by a concave portion of the female joint fitting, and the joint convex portion is a male mold having a convex portion which fits only into the concave portion of the female joint fitting. With the joint fitting, the strength of the uneven joint portion can be improved, and the pulling resistance during the operation such as the internal water pressure can be reliably ensured.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a joint structure of segments according to the present invention.

FIG. 2 is a schematic view showing a junction surface in a tunnel direction of a segment in the bonding structure of the present invention.

FIG. 3A is a schematic view showing a female joint fitting used in the joint structure of the present invention, and FIG. 3B is a view taken along line AA of FIG. 3A.

FIG. 4 (a) is a schematic view showing a male fitting used in the joint structure of the present invention, and FIG. 4 (b) is a view taken along line BB of FIG. 4 (a).

FIG. 5 is a schematic perspective view showing one segment in the joint structure of the present invention.

FIG. 6 is a schematic perspective view showing the other segment in the joint structure of the present invention.

FIG. 7 is a schematic sectional view showing another embodiment of the joining structure of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Joining structure, 2 ... Segment, 2a ... Joining surface, 2b ... Joining surface, 3 ... Joining groove, 3a ... Opening, 3b ... Opening, 3c ... Groove main part, 4 ... Joining convex part, 5 ... Female fitting, 5a recess, 5b filling hole, 5c body, 5d anchor, 6 male fitting, 6a convex, 6b body, 6c connecting part, 6d
Anchor part, 7 ... fitting clearance part, 8 ... pin, 9 ...
Filler injection hole (air vent hole).

Continuing on the front page (72) Inventor Masashi Yamamoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yutaka Fujino 4-2-2 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. (72) Inventor Yasushi Sakuma 4- 2-3 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. F-term (reference) 2D055 BA01 BB01 GC04

Claims (1)

[Claims] 1. A segment ring for joining a plurality of segments in the direction of a tunnel for lining a shield tunnel, the joining structure of each segment in the direction between the segments, and joining in the direction of the segment in one segment to be joined. A groove extending in the tunnel direction and having a groove cross-section opened in a junction surface in the tunnel direction, and inserted into the junction groove from an opening in the tunnel direction. To fit
A joining projection projecting from the inter-segment joining surface of the other segment to be joined, and the inter-segment joining surface of the one segment to be joined includes A male joint fitting having a female fitting having a concave portion that becomes a part of the joining groove is embedded, and wherein the joining convex portion has a convex portion that fits only into the concave portion of the female fitting metal. A segment joining structure characterized by being constituted by metal fittings.