JP2566495B2 - Joint structure of steel shell concrete segment - Google Patents

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 steel shell concrete segment having a steel peripheral frame used for tunnel lining.

[0002]

2. Description of the Related Art Conventionally, as a joint structure for a segment,
As shown in FIG. 13, concrete 8 is filled in a steel peripheral frame 7 having an H-shaped cross section to construct segments 1 and 5 of a steel shell concrete structure, and the tunnel lengths in the segments 1 and 5 adjacent to each other in the tunnel longitudinal direction. A joint structure is known in which the end surface of the outer flange 2 and the end surface of the inner flange 3 at the end portions in the direction are brought into contact with each other, and the space between the steel peripheral frames 7 in the segments 1 and 5 adjacent in the tunnel longitudinal direction is filled with mortar 9. Has been.

[0003]

In the case of the conventional segment joint structure described above, the end faces of the outer flange 2 and the end faces of the inner flange 3 of the segments 1 and 5 adjacent to each other in the longitudinal direction of the tunnel are simply butted against each other. Therefore, as shown in FIG. 14, when the outer flanges and the inner flanges that are adjacent to each other in the tunnel longitudinal direction are eccentric, that is, the outer flanges and the inner flanges are not in surface contact over the entire surface, the joint portion of the segment When a large jack thrust force acts on the outer flange 2 and the inner flange 3, the jack thrust force acts in an eccentric state, so that the outer flange 2 and the inner flange 3 are deformed in the tunnel radial direction and sheared to the concrete 8 and the mortar 9. The force acts and the shearing force causes concrete 8 and There is a possibility that a crack occurs in Le 9,
Further, if the outer flange 2 and the inner flange 3 that are adjacent to each other in the longitudinal direction of the tunnel are eccentric, there arises a problem that a strong jack thrust cannot be reliably transmitted.
Furthermore, when the mortar 9 is injected between the peripheral frames 7 of the adjacent segments 1 and 5, the adjacent peripheral frames 7 are
Between the outer flanges 2 or the inner flanges 3 of
The mortar 9 may leak.

[0004]

In order to advantageously solve the above-mentioned problems, in the joint structure of the steel shell concrete segment of the present invention, the outer flange 2 and the inner flange 3 connected by the steel plate web 10 are used. In a joint structure of a steel shell concrete segment having a configured steel peripheral frame 7, each of the tunnel longitudinal direction end portion and the tunnel circumferential direction end portion of one segment 1 adjacent in the tunnel longitudinal direction and the tunnel circumferential direction is 2 Protrusions 4 extending in the tunnel circumferential direction and the tunnel longitudinal direction are provided on the tip sides of the outer flange 2 and the inner flange 3 on the sides, and each of the protrusions 4 forms a slope on a part thereof, and In the other segment 5 adjacent in the tunnel circumferential direction, the tunnel longitudinal direction end portion and the outer circumferential flap on each of two sides of the tunnel circumferential direction end portion. Recesses 6 extending in the circumferential direction of the tunnel and the longitudinal direction of the tunnel are provided on the tip side of the flange 2 and the inner flange 3, and a part of each recess 6 has the same slope as a slope forming a part of the ridge 4. Of the outer flange 2 and the inner flange 3 of the one segment 1 into the recesses 6 of the outer flange 2 and the inner flange 3 of the other segment 5 to form the above-mentioned problem. Can be solved advantageously.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, FIGS. 1 to 4 show a first embodiment of the present invention, in which two adjacent sides of an arc-shaped steel peripheral frame 7 having an H-shaped cross section are outside. On the front side of the flange 2 and the inner flange 3, on the back side, a ridge 4 having a wedge-shaped cross section, which is provided with a slope, is integrally provided, and the surfaces of the outer flange 2 and the inner flange 3 on the remaining two sides of the peripheral frame 7 are integrated. On the side, a recess 6 having a slope having the same slope as the slope of the protrusion 4 is provided, and the protrusion 4 and the recess 6 are formed on the outer flange 2 and the inner flange 3 of the peripheral frame 7.
The segment 1 and 5 are formed by extending in parallel to the surface of the above and filling the peripheral frame 7 with concrete 8.

Segments 1, 5 constructed as described above
Are arranged side by side in the circumferential and longitudinal directions in the tunnel, and the ridges 4 in the adjacent segments 1 and 5 are arranged.
Of the mortar 9 in the recess 6 and in the space formed between the steel peripheral frames 7 of the adjacent segments 1 and 5.
Is filled.

FIGS. 5 to 7 show examples of manufacturing the segments 1 and 5, in which a steel plate web 1 is provided between a steel outer flange 2 and a steel inner flange 3 each having a ridge 4.
0 is interposed and fixed by welding, and a steel plate web 10 is interposed between the steel outer flange 2 and the steel inner flange 3 having the concave portion 6 and fixed by welding. The quadrangular frame-shaped outer flange 2 and inner flange 3 that are provided are composed of a corner flange 11 and an intermediate flange 12, and the corner flange 11
And the intermediate flange 12 are joined together by welding, and the quadrangular frame-shaped outer flange 2 having the protrusion 4 and the recess 6 is formed.
And a square frame-shaped inner flange 3 having the ridges 4 and the concave portions 6 and a web 10 interposed and fixed between the outer flange 2 and the inner flange 3 to form a square frame-shaped steel. A peripheral edge frame 7 is formed, concrete 8 is filled in the peripheral edge frame 7 made of steel, and arc-shaped segments 1 and 5 are formed.

FIGS. 8 and 9 show a second embodiment of the present invention, in which the trapezoidal projections are formed on the tips of the outer flange 2 and the inner flange 3 of the steel peripheral frame 7 in one segment 1. 4 are integrally provided, and a trapezoidal recess 6 is provided at the tip of the outer flange 2 and the inner flange 3 of the steel peripheral frame 7 in the other segment 5, and the projection 4 is fitted into the recess 6. But other configurations are first
This is similar to the case of the embodiment.

FIG. 10 shows a third embodiment of the present invention in which a web 10, an outer flange 2 and an inner flange 3 are integrally formed by roll forming. In the case of this embodiment, the steel peripheral frame 7 can be constructed using a single frame material.

When the present invention is carried out, channel steel may be used as the steel material constituting the steel peripheral frame 7. Further, as the segments 1 and 5, as shown in FIG. 11, a steel outer skin plate 13 is fixed to a steel peripheral frame 7 by welding and is surrounded by the steel peripheral frame 7 and the outer skin plate 13. It is also possible to use a segment formed by filling concrete 8 into the box-shaped space, or FIG.
As shown in, the steel inner skin plate 14 is fixed to the steel peripheral frame 7 by welding, and the box-shaped space surrounded by the steel peripheral frame 7 and the inner skin plate 14 is filled with concrete 8. You may use the segment comprised.

A sealing material made of rubber or other elastic material is fixed to the bottom surface of the recess 6 with an adhesive, and the tip end of the ridge 4 is pressed against the sealing material. When the space between the steel peripheral frames 7 is filled with the mortar 9, it is possible to reliably prevent the mortar from leaking, and even if the mortar is injected at a relatively high pressure, the mortar leaks or the injection pressure is increased. It never drops. In the case of FIGS. 11 and 12, since the skin plate joints of the outer flange 2 and the inner flange 3 are retracted, it is possible to easily secure a groove for fillet welding and to easily perform fillet welding. You can

If a slanting surface is formed at the fitting portion of the protrusion 4 and the recess 6, even if the adjacent segments are slightly eccentric to the inside and outside of the tunnel, one segment can be pushed toward the other segment. By this, the eccentricity can be automatically corrected.

[0013]

According to the present invention, in a joint structure of steel shell concrete segments 1 and 5 having a steel peripheral frame 7 composed of an outer flange 2 and an inner flange 3 connected by a steel plate web 10, A ridge 4 provided on the outside and inside of the steel peripheral frame 7 in one of the segments 1 adjacent to each other in the tunnel longitudinal direction and the circumferential direction, and having a sloped surface in part.
Are provided on the outer side and the inner side of the steel peripheral frame 7 in the other segment 5 adjacent in the tunnel longitudinal direction and the circumferential direction, and are fitted into the recess 6 having a slope in part, so that the segments 1 adjacent in the tunnel longitudinal direction are , 5 can automatically correct the eccentricity so as not to be eccentric to the steel peripheral frame 7, and can be fitted and coupled, so that a strong jack thrust can be reliably transmitted between the front and rear segments 1 and 5. Moreover, the engagement between the protrusion 4 and the recess 6 can reliably transmit the shearing force in the tunnel inward direction from one segment to the other segment, and further, the segments 1 adjacent to each other in the tunnel longitudinal direction and the circumferential direction. , 5 when the space between the steel peripheral frames 7 is filled with the mortar 9, the mortar can be prevented from leaking and the hardened mortar 9 is not subjected to shearing force. Since, it is possible to prevent its mortar 9, the cracks due to shear forces that occur.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a joint structure of a segment according to a first embodiment.

FIG. 2 is an inner view of the segment according to the first embodiment as viewed from the inside of the tunnel.

FIG. 3 is an enlarged partial cutaway sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is an inner view showing an example of manufacturing a segment that can be used in the first embodiment.

6 is a partially cutaway sectional view taken along line CC of FIG.

FIG. 7 is a sectional view taken along line DD of FIG. 5;

FIG. 8 is a vertical sectional side view showing a joint structure for a segment according to a second embodiment.

FIG. 9 is a partially cutaway vertical side view showing a segment used in a second embodiment.

FIG. 10 is a vertical sectional side view showing a joint structure of a segment according to a third embodiment.

FIG. 11 is a cross-sectional view of a segment provided with an outer skin plate.

FIG. 12 is a cross-sectional view of a segment provided with an inner skin plate.

FIG. 13 is a vertical sectional side view showing a conventional joint structure for a segment.

FIG. 14 is a vertical cross-sectional side view showing an acting direction of a force when a jack thrust force acts on an eccentric conventional joint structure of a segment.

[Explanation of symbols]

 1 Segment 2 Outer Flange 3 Inner Flange 4 Projection 5 Segment 6 Recess 7 Steel Perimeter Frame 8 Concrete 9 Mortar 10 Steel Plate Web 13 Outer Skin Plate 14 Inner Skin Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Tsutomu Yokoyama Tsuyoshi Yokoyama 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (56) References Kokoku Sho 45-7941 (JP, Y1) Actual Kokoku Sho 43-15497 (JP, Y1)

Claims (1)

(57) [Claims] 1. A joint structure of a steel shell concrete segment having a steel peripheral frame 7 composed of an outer flange 2 and an inner flange 3 which are connected by a steel plate web 10, in a tunnel longitudinal direction and a tunnel circumferential direction. Outer flanges 2 on each of two sides of the tunnel longitudinal direction end and the tunnel circumferential direction end of one adjacent segment 1.
Also, on the tip side of the inner flange 3, there are provided ridges 4 extending in the tunnel circumferential direction and the tunnel longitudinal direction. Each of the ridges 4 forms an inclined surface, and the ridges 4 are formed in the tunnel longitudinal direction and the tunnel circumferential direction. Recesses 6 that extend in the tunnel circumferential direction and the tunnel longitudinal direction are provided at the tunnel longitudinal direction end of the other adjacent segment 5 and the tip ends of the outer flange 2 and the inner flange 3 on each of the two sides of the tunnel circumferential direction end. Is provided and a part of each recess 6 forms a slope having the same slope as the slope forming a part of the protrusion 4, and the protrusion 4 of the outer flange 2 and the inner flange 3 of the one segment 1 is provided. Is a joint structure of a steel shell concrete segment fitted in the recesses 6 of the outer flange 2 and the inner flange 3 of the other segment 5.