JPH04330197A - Segment joining structure - Google Patents

Abstract

PURPOSE:To prevent the end of one of the segments, adjacent in the tunnel longitudinal direction, from dislocating in the tunnel radial direction or inclining relative to the other segment. CONSTITUTION:In a joint structure in tunnel longitudinal direction of segments having a peripheral frame made of steel, ridges 4 provided on an outer flange 2 and inner flange 3 at the end of one of the segments adjacent in the tunnel longitudinal direction are fitted in recesses 6 provided in outer flange 2 and inner flange 3 at the end of the other segment 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment joint structure having a steel peripheral frame used for tunnel lining.

0002

[Prior Art] Conventionally, the joint structure of segments is as follows:
As shown in FIG. 17, segments 1 and 5 of the steel shell concrete structure are constructed by filling concrete 8 in a steel peripheral frame 7 with an H-shaped cross section, and the tunnel length in adjacent segments 1 and 5 in the longitudinal direction of the tunnel is A joint structure is known in which the end faces of the outer flange 2 and the inner flange 3 of the direction ends are brought into contact with each other, and the space between the steel peripheral frames 7 of the segments 1 and 5 adjacent in the longitudinal direction of the tunnel is filled with mortar 9. It is being

0003

[Problems to be Solved by the Invention] In the case of the conventional segment joint structure, the end surfaces of the outer flanges 2 and the inner flanges 3 of the segments 1 and 5 adjacent in the longitudinal direction of the tunnel are only butted against each other. Therefore, as shown in FIG. 18, when the outer flanges and inner flanges that are adjacent to each other in the longitudinal direction of the tunnel are eccentric, that is, when the outer flanges and the inner flanges are not in surface contact over the entire surface, the joint portion of the segment When a strong jack thrust acts on the outer flange 2 and inner flange 3, the jack thrust acts eccentrically on the outer flange 2 and inner flange 3, causing the outer flange 2 and inner flange 3 to deform in the radial direction of the tunnel, causing shear to the concrete 8 and mortar 9. There is a risk that cracks will occur in the concrete 8 and mortar 9 due to the force acting and the shearing force.
Moreover, if the outer flange 2 and inner flange 3 adjacent to each other in the longitudinal direction of the tunnel are eccentric, a problem arises in that the powerful jack thrust cannot be reliably transmitted. Furthermore, when the mortar 9 is injected between the peripheral frames 7 in the adjacent segments 1 and 5, the adjacent peripheral frames 7
From between the outer flanges 2 or between the inner flanges 3,
Mortar 9 may leak.

0004

[Means for Solving the Problems] In order to advantageously solve the above-mentioned problems, in the segment joint structure of the present invention, the segment joint structure having a steel peripheral frame has the following features:
Projections 4 extending in the circumferential direction of the tunnel are provided on the tip sides of the outer flange 2 and inner flange 3 at the ends in the tunnel longitudinal direction in one segment 1 adjacent in the tunnel longitudinal direction, and the other segment 1 adjacent in the tunnel longitudinal direction A recess 6 extending in the circumferential direction of the tunnel is provided on the tip side of the outer flange 2 and inner flange 3 at the longitudinal end of the tunnel in 5, and the protrusion 4 of the outer flange 2 and inner flange 3 in the one segment 1 is It fits into the recess 6 of the outer flange 2 and inner flange 3 of the other segment 5. In addition, in the joint structure of segments having a steel peripheral frame, protrusions 4 extending in the tunnel circumferential direction are provided on the outside and inside of the tunnel longitudinal end in one of the segments 1 adjacent in the tunnel longitudinal direction.
are provided on the outside and inside of the tunnel longitudinal end in the other segment 5 adjacent in the tunnel longitudinal direction,
Also, by providing an outer flange 2 and an inner flange 3 that extend in the circumferential direction of the tunnel, and fitting the pair of protrusions 4 on one segment 1 into the back side of the outer flange 2 and inner flange 3 on the other segment 5. , the aforementioned problem can be advantageously solved.

[0005]

[Embodiment] Figures 1 to 4 show a first embodiment of the present invention, in which the surfaces of the outer flange 2 and the inner flange 3 on two adjacent sides of a circular arc-shaped steel peripheral frame 7 with an H-shaped cross section are shown. Projections 4 having a wedge-shaped cross section and having slopes are integrally arranged on the sides and the back side, and the projections 4 are provided on the surface sides of the outer flange 2 and the inner flange 3 on the remaining two sides of the peripheral frame 7. A recess 6 having a slope with the same slope as the slope is provided, the protrusion 4 and the recess 6 extend parallel to the surfaces of the outer flange 2 and the inner flange 3 in the peripheral frame 7, and the concrete 8 is placed inside the peripheral frame 7. Filled to form segments 1 and 5.

Segments 1 and 5 configured as described above
are arranged side by side in the circumferential direction and longitudinal direction in the tunnel, and the protrusions 4 in adjacent segments 1 and 5
is fitted into the recess 6, and mortar 9 is placed in the space formed between the steel peripheral frames 7 of the adjacent segments 1 and 5.
is filled.

5 to 7 show examples of manufacturing the segments 1 and 5, in which a steel plate web 1 is placed between a steel outer flange 2 having a protrusion 4 and a steel inner flange 3.
0 is interposed and fixed by welding, and a steel plate web 10 is interposed and fixed by welding between a steel outer flange 2 and a steel inner flange 3 having a recess 6,
The outer flange 2 and the inner flange 3, each having a rectangular frame shape having a protrusion 4 and a recess 6, are composed of a corner flange 11 and an intermediate flange 12, and the corner flange 11 and the intermediate flange 12 are connected by welding. Between the outer flange 2 in the shape of a square frame having the protrusion 4 and the recess 6, the inner flange 3 in the shape of a square frame having the protrusion 4 and the recess 6, and the outer flange 2 and the inner flange 3. The interposed and fixed web 10 constitutes a rectangular steel peripheral frame 7, and the steel peripheral frame 7 is filled with concrete 8 to form arc-shaped segments 1,
5 are configured.

FIGS. 8 and 9 show a second embodiment of the present invention, in which the steel peripheral frame 7 and the steel peripheral frame 7 in segments 1 and 5 are made up of concrete 8 filled therein. Projections 4 located on the inner side, that is, on the tunnel center side and on the outer side, that is, on the ground side, are integrally arranged on two adjacent sides of the steel peripheral frame 7 in the segments 1 and 5, and on the remaining two sides of the steel peripheral frame 7 in the segments 1 and 5, An outer flange 2 and an inner flange 3 are provided, the outer flange 2 and the inner flange 3 projecting from the segment body.

Segments 1 and 5 configured as described above
are arranged side by side in the circumferential direction and longitudinal direction in the tunnel, and a pair of protrusions 4 in one adjacent segment 1 are fitted into the back side of the outer flange 2 and inner flange 3 in the other adjacent segment 5. , and the space formed between the steel peripheral frames 7 in the adjacent segments 1 and 5 is filled with mortar 9.

FIGS. 10 and 11 show a third embodiment of the present invention, in which the outer flange 2 and inner flange 3 of the steel peripheral frame 7 in one segment 1 are provided with a protrusion having an arcuate end surface. An arc-shaped recess 6 is provided at the tips of the outer flange 2 and inner flange 3 of the steel peripheral frame 7 in the other segment 5, and the protrusion 4 is fitted into the recess 6. However, the other configurations are the same as in the first embodiment.

FIGS. 12 and 13 show a fourth embodiment of the present invention, in which trapezoidal protrusions are provided at the tips of the outer flange 2 and inner flange 3 of the steel peripheral frame 7 in one segment 1. A trapezoidal recess 6 is provided at the tips of the outer flange 2 and the inner flange 3 of the steel peripheral frame 7 in the other segment 5, and the protrusion 4 is fitted into the recess 6. However, the other configurations are the same as in the first embodiment.

FIG. 14 shows a fifth 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 this embodiment, the steel peripheral frame 7 can be constructed using a single frame member.

When carrying out the present invention, channel steel may be used as the steel material constituting the steel peripheral frame 7. As shown in FIG. 15, the segments 1 and 5 are formed by fixing a steel outer skin plate 13 to a steel peripheral frame 7 by welding, and surrounding the steel outer skin plate 7 and the outer skin plate 13. A segment formed by filling the box-shaped space with concrete 8 may be used, or as shown in FIG.
As shown in FIG. 1, a steel inner skin plate 14 is fixed to a steel peripheral frame 7 by welding, and a box-shaped space surrounded by the steel peripheral frame 7 and the inner skin plate 14 is filled with concrete 8. You may also use segments constructed by

[0014] If 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 of the protrusion 4 is pressed against the sealing material, the adjacent segments 1 and 5 can be When the space between the steel peripheral frames 7 is filled with 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 will not leak or the injection pressure will be low. There will be no decline. In the case of FIGS. 15 and 16, since the skin plate joints at the outer flange 2 and inner flange 3 are recessed, a groove for fillet welding can be easily secured and fillet welding can be easily performed. Can be done.

[0015] If a slope is formed at the fitting portion of the protrusion 4 and the recess 6, even if the adjacent segments are slightly eccentric in the tunnel inner and outer directions, one segment can be pushed toward the other segment. This allows eccentricity to be corrected automatically.

[0016]

According to the present invention, in the joint structure of the segments 1 and 5 having the steel peripheral frame 7, the steel peripheral frame 7 in one of the segments 1 adjacent in the tunnel longitudinal direction
The protrusions 4 provided on the outside and inside of the steel peripheral frame 7 are fitted into the recesses 6 provided on the outside and inside of the steel peripheral frame 7 in the other segment 5 adjacent in the longitudinal direction of the tunnel, or Since it is fitted into the back side of the outer flange 2 and inner flange 3 that protrude outward and inward, it is possible to fit and connect the steel peripheral frames 7 of the segments 1 and 5 adjacent in the longitudinal direction of the tunnel without eccentricity. Therefore, a strong jack thrust can be reliably transmitted between the front and rear segments 1 and 5, and the engagement between the protrusion 4 and the recess 6 or the engagement between the protrusion 4 and the outer flange 2 and inner flange 3 can be reduced. This allows the shear force in the tunnel inner direction to be reliably transmitted from one segment to the other, and furthermore, the mortar 9 is placed in the space between the steel peripheral frames 7 of the segments 1 and 5 adjacent in the longitudinal direction of the tunnel. When filled, the mortar can be prevented from leaking, and since no shear force is applied to the hardened mortar 9, cracks can be prevented from forming in the mortar 9 due to shear force.

[Brief explanation of drawings]

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

FIG. 2 is an internal view of the segment in the first embodiment as seen from inside the tunnel.

FIG. 3 is an enlarged partially cutaway sectional view taken along line A-A in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

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

FIG. 6 is an enlarged partially cutaway sectional view taken along line CC in FIG. 5;

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

FIG. 8 is a longitudinal sectional side view showing a joint structure of segments according to a second embodiment.

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

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

FIG. 11 is a partially cutaway longitudinal side view showing a segment used in the third embodiment.

FIG. 12 is a longitudinal sectional side view showing a segment joint structure according to a fourth embodiment.

FIG. 13 is a partially cutaway longitudinal side view showing a segment used in the fourth embodiment.

FIG. 14 is a longitudinal sectional side view showing a segment joint structure according to a fifth embodiment.

FIG. 15 is a cross-sectional view of a segment with an outer skin plate.

FIG. 16 is a cross-sectional view of a segment with an inner skin plate.

FIG. 17 is a longitudinal side view showing a conventional segment joint structure.

FIG. 18 is a longitudinal sectional side view showing the direction of force when a jack thrust is applied to a conventional eccentric segment joint structure.

[Explanation of symbols]

1 Segment 2 Outer flange 3 Inner flange 4 Projection 5 Segment 6 Recess 7 Steel peripheral frame 8 Concrete 9 Mortar 13 Outer skin plate 14 Inner skin plate

Claims (4)

[Claims] Claim 1: In a joint structure of segments having a steel peripheral frame, on the tip side of the outer flange 2 and the inner flange 3 at the tunnel longitudinal end in one of the segments 1 adjacent in the tunnel longitudinal direction, An extending protrusion 4 is provided, and a recess 6 extending in the circumferential direction of the tunnel is provided on the tip side of the outer flange 2 and the inner flange 3 at the ends in the tunnel longitudinal direction in the other segment 5 adjacent in the tunnel longitudinal direction, A segment joint structure in which the protrusions 4 of the outer flange 2 and inner flange 3 of one segment 1 are fitted into the recesses 6 of the outer flange 2 and inner flange 3 of the other segment 5. 2. In a joint structure of segments having a steel peripheral frame, protrusions 4 extending in the circumferential direction of the tunnel are provided on the outside and inside of the longitudinal end of the tunnel in one of the segments 1 adjacent in the longitudinal direction of the tunnel. is,
An outer flange 2 and an inner flange 3 extending in the circumferential direction of the tunnel are provided on the outside and inside of the tunnel longitudinal end of the other segment 5 adjacent in the tunnel longitudinal direction, and the pair of protrusions 4 in the one segment 1 are provided. However, the outer flange 2 in the other segment 5
and a joint structure of segments fitted into the back side of the inner flange 3. 3. A protrusion 4 extending in the longitudinal direction of the tunnel is provided on the tip side of the outer flange 2 and the inner flange 3 at the ends in the tunnel circumferential direction in one of the segments adjacent in the tunnel circumferential direction. A recess 6 extending in the longitudinal direction of the tunnel is provided on the tip side of the outer flange 2 and inner flange 3 at the ends in the circumferential direction of the tunnel in the other adjacent segment 5, and the outer flange 2 and the inner flange 3 in the one segment 1 2. The segment joint structure according to claim 1, wherein the protrusion 4 is fitted into the recess 6 of the outer flange 2 and the inner flange 3 of the other segment 5. 4. Projections 4 extending in the longitudinal direction of the tunnel are provided on the outside and inside of the ends in the tunnel circumferential direction of one of the segments adjacent in the tunnel circumferential direction,
An outer flange 2 and an inner flange 3 extending in the longitudinal direction of the tunnel are provided on the outside and inside of the ends in the tunnel circumferential direction of the other segment 5 adjacent to each other in the tunnel circumferential direction, and a pair of protrusions 4 in the one segment 1 are provided. However, the outer flange 2 in the other segment 5
and a segment joint structure according to claim 2, which is fitted into the back side of the inner flange 3.