JPH0533595A - Coupling construction of segment - Google Patents

Abstract

PURPOSE:To couple easily and firmly tunnel lining segments in an accurate state. CONSTITUTION:Projection threads 5 are provided to outside flanges 3 and inside flanges 4 of a steel circumferential edge frame 2 in one segment to coupled. Recesses 7 fitting the projection threads 5 are provided on the outside flanges 3 and the inside flanges 4 of a steel circumferential edge frame 2 in the other sent 6, and a locking metal fitting 10 hearing an insertion hole is fixed to the steel circumferential edge frame 2 of the other segment. An insertion metal fitting 12 having an insertion projection 11 is fixed to the steel circumferential edge frame 2 in the other segment, and a segment drawing induced slope 13 is provided on the insertion projection 11. A pair of projection threads 5 are fitted to a pair of recesses 7, and the insertion projection 11 is inserted into the locking metal fitting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment connecting structure used for lining shield tunnels.

[0002]

2. Description of the Related Art Conventionally, as a segment connecting structure,
As disclosed in Japanese Examined Patent Publication No. 54-12747, there is known a connecting structure in which adjacent segments are butted and joined by bolts.

[0003]

In the case of the above-mentioned conventional connecting structure of segments, a large number of bolts have to be respectively rotated and tightened, so that the connecting operation is complicated, and the side surfaces of adjacent segments simply contact each other. Since the connection strength in the segment thickness direction is extremely weak,
Since the other segment can move in a direction perpendicular to the tunnel axis direction with respect to one segment, there is a problem that the roundness of the segment ring is poor.

[0004]

In order to advantageously solve the above-mentioned problems, in the segment connecting structure of the present invention, in the segment connecting structure having a steel peripheral frame, one segment 1 to be connected is connected. The outer flange 3 and the inner flange 4 of the steel peripheral frame 2 are provided with the protrusions 5 extending in the peripheral frame longitudinal direction, and the outer flange 3 and the inner flange 4 of the steel peripheral frame 2 in the other segment 6 to be connected are provided. , A recess 7 into which the protrusion 5 is fitted, and a web 8 in the steel peripheral frame 2 of one segment
, A locking metal fitting 10 having an insertion hole 9 opening in the longitudinal direction of the flange is fixed, and an insertion protrusion 11 protruding in the longitudinal direction of the flange is inserted into the web 8 of the steel peripheral frame 2 of the other segment. Fix the metal fitting 12 and insert the projection 1
1 is provided with a segment attraction guide slope 13 that is inclined so as to separate from the web 8 from the base end side toward the tip end,
With the pair of protrusions 5 facing the pair of recesses 7, each segment is relatively moved in the longitudinal direction of the flange, and the insertion protrusion 11 is inserted into the locking metal fitting 10.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 3 to 10 show segments 1 and 6 with a locking metal fitting 10 and an inserting metal fitting 12 used in an embodiment of the present invention, which are made of steel and have a substantially H-shaped cross section. A steel skin plate 14 is fixed by welding to the ground side of the peripheral frame 2 to form a steel shell, and concrete 15 is filled in the steel shell.
The protrusions 5 are provided on the outer sides of the outer flange 3 and the inner flange 4 on the two adjacent sides of, and the recesses 7 are formed on the inner sides of the outer flange 3 and the inner flange 4 on the remaining two sides of the steel peripheral frame 2. The segments 1 and 6 are provided.

At one end of the segments 1 and 6 in the circumferential direction of the tunnel, a plurality of U holes are provided outside the web 8 of the steel peripheral frame 2 so as to open in the longitudinal direction of the flange of the steel peripheral frame 2. The shape locking metal fittings 10 are arranged at intervals in the longitudinal direction of the web, and the ends of both arms of the locking metal fitting 10 are fixed to the web 8 by welding.

At the other ends of the segments 1 and 6 in the circumferential direction of the tunnel, a plurality of insertion protrusions 11 projecting in the longitudinal direction of the flange of the steel peripheral frame 2 are provided outside the web 8 of the steel peripheral frame 2. The L-shaped insertion fittings 12 are arranged at intervals in the longitudinal direction of the web, the base end portion of the insertion fitting 12 is fixed to the web 8 by welding, and the insertion projections 11 are arranged on the web 8 side. A segment pulling guide slope 13 is provided that is inclined so as to separate from the web 8 from the base end side of the insertion protrusion 11 toward the tip end.

When the end portions of the segments 1 and 6 in the tunnel circumferential direction are connected, the segments 1 and 6 are relatively arranged with the pair of protrusions 5 in each segment 1 and 6 being brought close to the pair of recesses 7. And the insertion protrusion 11 of the insertion fitting 12 is inserted into the insertion hole 9 of the locking fitting 10. By doing so, the segments 1 and 6 are moved closer to each other by the engagement between the segment pulling guide slope 13 of the insertion projection 11 and the locking metal fitting 10, and the pair of protrusions 5
And the pair of recesses 7 are automatically fitted to each other, and when the segment ring is configured in this manner, the segment ring is firmly connected in a perfect circle. After connecting the segments 1 and 6 as described above, the space between the steel peripheral frames 2 of each segment 1 and 6 is filled with mortar 18 by injection.

The segments adjacent in the tunnel axial direction are
It is connected by a bolt or other connecting means. FIG. 11 shows a connecting structure of the key segment 20 and the segment 21 adjacent to the key segment 20. The web 8 of the steel peripheral frame is inclined with respect to the tunnel axis direction C, but other configurations are the same as those of the above embodiment. It is similar to the case of the example.

[0010]

According to the present invention, the protrusions 5 are provided on the outer flange 3 and the inner flange 4 of the steel peripheral frame 2 in one segment 1 to be connected, and the steel peripheral frame 2 in the other segment 6 is formed. The outer flange 3 and the inner flange 4 are provided with recesses 7 into which the protrusions 5 are fitted, and the locking metal fitting 1 having an insertion hole in the steel peripheral frame 2 of one segment.
0 is fixed, the insertion metal fitting 12 having the insertion protrusion 11 is fixed to the steel peripheral frame 2 of the other segment, and the segment pull-in guide slope 13 is provided on the insertion protrusion 11. By inserting the projection 11 into the locking metal fitting 10, the segments 1 and 6 are moved relatively close to each other, and the projections 5 and the recesses 7 of the outer flange 3 and the inner flange 4 are automatically fitted. Therefore, it is possible to easily and firmly connect the segments in an accurate state.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view showing a segment connecting structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing a connection structure of segments according to an embodiment of the present invention.

FIG. 3 is a front view of a segment having locking fittings and insertion fittings.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a side view of the segment as seen from the side of the locking fitting.

FIG. 6 is a side view of the segment as seen from the insertion fitting side.

FIG. 7 is a vertical cross-sectional perspective view showing the vicinity of locking fittings in a segment.

FIG. 8 is a vertical cross-sectional front view showing the vicinity of a locking fitting in a segment.

FIG. 9 is a vertical cross-sectional perspective view showing the vicinity of the insertion fitting in the segment.

FIG. 10 is a vertical sectional front view showing the vicinity of the insertion fitting in the segment.

FIG. 11 is a cross-sectional plan view showing a connecting portion between a key segment and a segment adjacent to the key segment.

[Explanation of symbols]

 1 segment 2 steel peripheral frame 3 outer flange 4 inner flange 5 ridge 6 segment 7 recess 8 web 9 insertion hole 10 locking metal fitting 11 insertion projection 12 insertion metal fitting 13 segment pulling guide slope 14 steel skin plate 15 Concrete 18 mortar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiko Yoshizumi 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division

Claims (1)

Claim: What is claimed is: 1. In a joint structure of a segment having a steel peripheral frame, the outer flange 3 and the inner flange 4 of the steel peripheral frame 2 in one of the segments 1 to be connected,
A protrusion 5 extending in the longitudinal direction of the peripheral frame is provided, and a recess 7 for fitting the protrusion 5 is provided on the outer flange 3 and the inner flange 4 of the steel peripheral frame 2 in the other segment 6 to be connected. Fixing metal fitting 10 having an insertion hole 9 opening in the longitudinal direction of the flange is fixed to the web 8 of the steel peripheral frame 2 of the segment, and the web 8 of the steel peripheral frame 2 of the other segment is fixed to the web 8 in the flange longitudinal direction. An insertion metal fitting 12 having an insertion protrusion 11 projecting from the front side is fixed, and a segment pulling guide slope 13 inclined to the insertion protrusion 11 so as to separate from the web 8 from the base end side toward the tip end.
And the pair of protrusions 5 are opposed to the pair of recesses 7, the segments are relatively moved in the longitudinal direction of the flange, and the insertion protrusion 11 is inserted into the locking fitting 10. Connection structure of segments.