JP2001207798A - Reinforcing wall structure of tunnel inner wall and reinforcing segment used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a reinforcing wall of an inner wall by simple work as a countermeasure for concrete falling in a tunnel. SOLUTION: A segment 10 is of a cast iron made rectangular shape having a curvature R along a tunnel inner wall 3 and is furnished with a cross-section wedge shape projected streak 17 on the upper side and a groove 18 on the lower side. A projection 19 is provided on the left side and a cutout 20 is furnished on the right side. A lightening hole 22 is provided on the inside of a rectangular frame 11 to divide a peripheral edge of the segment. The projected streak of the segment on the lower side is received in a goove of the segment on the upper side and is engaged with it, and one row of reinforcing walls to cover the inwall 3 is formed as the above is sequentially repeated. At this time, it is possible to engage the segment on the upper side with the lower side only be sliding it in the tunnel longitudinal direction. The reinforcing walls after the second row are formed in the same way, and the segments adjacent to each other between the row are assembled as the projections and the cutouts are engaged with each other, and rigidity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing wall structure for an inner wall of a tunnel and a reinforcing segment used for the structure.

[0002]

2. Description of the Related Art In railroads and road tunnels, the inner wall is made of concrete, but cracks or deterioration have caused an accident that a part of the inner wall falls on a railroad track or a vehicle traveling road. Conventionally, when such an accident has occurred, the damaged portion of the concrete has been hit anew, or a steel plate has been applied to prevent further damage from spreading.

[0003]

However, even if new concrete is re-punched in the missing part of the concrete, the bond strength between the main part and the refilled refill is lower than the bond strength in other normal parts. It is inevitable, and it is not easy to check how strong the strength is. On the other hand, the countermeasure against applying a steel sheet also has a problem that the fixing strength itself of the steel sheet remains uneasy and corrodes as time passes. All of the above conventional measures require a considerable amount of time for the work, and thus it is necessary to stop the operation of trains and the passage of vehicles for a long time.

Accordingly, the present invention has been made in view of the above problems, and as a reinforcement for repairing the possibility of concrete falling or a repair after a fall, the work can be performed easily and in a short time, and a reliable reinforcement can be obtained. An object of the present invention is to provide a reinforcing wall structure and a reinforcing segment used for the same.

[0005]

According to the first aspect of the present invention, there is provided a reinforcing wall structure for an inner wall of a tunnel, wherein a plurality of cast iron segments are connected by connecting means along the inner wall of the tunnel section.
A continuous wall including at least an arched portion was formed. Thus, the plurality of segments cover the inner wall of the tunnel in a stretched state, and prevent concrete from falling. Also, since the segments are made of cast iron, they maintain their functions without rusting for a long time.

Further, by forming a plurality of the continuous walls in the longitudinal direction of the tunnel, a reinforcing wall can be formed over an arbitrary range of the length of the tunnel. In addition, it is desirable that the segments adjacent to each other in the longitudinal direction of the plurality of rows of tunnels be aligned by alignment means, so that the overall balance is improved and high assembly rigidity is obtained. Disperse in.

The reinforcing segment for the inner wall of the tunnel according to claim 4 has a basic rectangular shape made of cast iron and has a curved inner wall of the tunnel section, and has a first half of the connecting means on one of the upper and lower sides. The other half is provided with the second half of the connecting means. By connecting and extending adjacent segments sequentially by connecting the first half and the second half,
A reinforcing wall is formed along the inner wall of the tunnel section. Further, by repeating in the longitudinal direction of the tunnel, a plurality of rows of reinforcing walls are formed.

The first half of the connecting means is formed as a ridge along one of the upper and lower sides, and the second half is formed as a groove corresponding to the ridge. Simply by sliding and assembling, the reinforcing wall is easily formed. In addition, as the connecting means, the first half and the second half may be respectively corresponding flanges, and the flanges may be bolted. This also makes it easy to extend along the inner wall of the tunnel section.

Further, it is preferable that one of the left and right sides is provided with a first half of the alignment means, and the other is provided with a second half of the alignment means. By connecting the adjacent segments between the rows by the alignment means, high assembly rigidity is obtained as a whole. The alignment means has a projection on the first half,
By making the second half a notch corresponding to the projection,
When the segments in the second and subsequent rows are slid and assembled, the projection and the notch are automatically engaged and connected.

[0010] Further, by providing a lightening hole inside the rectangular frame that defines the periphery, the material and weight can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to examples. 1A and 1B show a segment in an embodiment, in which FIG. 1A is an end view, and FIG. 1B is AA in FIG.
It is an arrow view. The segment 10 is made of cast iron, and its entire basic shape is a rectangular shape having a curvature R on the inner wall 3 of the tunnel. The upper and lower sides, for example, the upper side 12 are provided with ridges 17 having a wedge-shaped cross section, and the other side is formed. For example, the lower side 13 is provided with a groove 18 corresponding to the ridge 17 over the entire width.

The left and right sides of the segment 10, for example, the left side 14 are provided with protrusions 19, and the other side, the right side 15
Has a notch 20 corresponding to the projection 19. The inside of the rectangular frame 11 that defines the periphery of the segment 10 is formed into a lattice shape by the lightening holes 22 to reduce the material and the weight. In addition, as a material of the segment 10, ductile cast iron (spheroidal graphite cast iron) is particularly preferable in terms of strength.

The segment 10 configured as described above
As shown in FIG. 2 and FIG. 3, a reinforcing wall 5 connecting a plurality of the inner walls 3 of the concrete tunnel 1 is connected.
To form FIG. 2 shows a case where the cross-sectional shape of the tunnel 1A is circular, and the tunnel 1A is installed over the entire circumferential direction. FIG. 3 shows a case where the cross-sectional shape of the tunnel 1B is substantially semicircular, and the tunnel 1B may be installed only on a curved surface portion.

FIG. 4 shows a segment 10 (10A, 10B,
10C) shows the connection state in the circumferential direction of FIG. The wedge-shaped ridge 17 on the upper side of the segment 10A is received in the groove 18 on the lower side of the segment 10B disposed above the segment, and the groove 18 on the lower side of the segment 10A is positioned on the upper side of the segment 10C disposed below the segment. Ridge 17
Receiving each other and meshing. Here, ridge 1
The combination of 7 and groove 18 constitutes the connecting means of the invention.

FIG. 5 shows a segment 10 (10F, 10G,
10H) shows the connection state in the left-right direction, that is, the longitudinal direction of the tunnel. Projection 19 on the left side of segment 10F
Is a segment 10G arranged on the left of the segment
And the notch 20 on the right side of the segment 10F receives the protrusion 19 on the left side of the segment 10H disposed on the right of the segment 10F.
The combination of the projection 19 and the notch 20 constitutes the alignment means of the present invention.

Since the segment 10 of this embodiment is constructed as described above, for example, in a tunnel having a substantially semicircular cross section (see FIG. 3), first, the first segments 10a are respectively provided at the lowermost portions on both sides of the curved surface portion. Installed, and the second and third segments 10b and 10c are sequentially slid from the lateral direction (left-right direction) upward to engage with the ridge 17 and the groove 18 to extend upward along a curved surface. Can be. Then, while sliding the last one segment at the top of the tunnel cross section, the ridge 17 and the groove 18 are connected to the groove 18 and the ridge 17 of the segments on both sides.
To form a row of reinforcing walls 5 in the longitudinal direction of the tunnel.

Similarly, the segments in the second row are successively slid from the bottom to be adjacent to the segments in the first row. At this time, adjacent segments, for example, 10F
The notch 20 engages with the projection 19 of 10G (see FIG. 5). Due to the engagement of the projections and notches, the segments of each row are also aligned in the longitudinal direction of the tunnel. Thereafter, by repeating the same procedure, the reinforcing wall 5 for the tunnel inner wall 3 is formed over a required length.

This embodiment is constructed as described above, and is provided with a ridge 18 which meshes by sliding on the upper and lower sides of an adjacent segment 10 having a rectangular basic shape and a groove 18 for receiving the ridge 18. The reinforcing wall 5 that covers the curved surface portion of the tunnel inner wall 3 can be formed, and concrete can be easily and quickly prevented from falling at a portion that may be damaged. And since the segment is made of cast iron, the above-mentioned prevention effect is maintained without rusting for a long time unlike a thin steel plate or the like.

It is also easy to form a plurality of rows of reinforcing walls in the longitudinal direction of the tunnel. At this time, since the projections 19 and the notches 20 meshing with each other are also provided on the left and right sides of the segments, adjacent segments in each row are engaged with each other, and high assembly rigidity is obtained as a whole.

When the ridges 17 and the grooves 18 are set so as to alternately extend from one side of the tunnel cross section to the opposite side via the top portion, the ridges 17 are provided on the upper side of the segment on one side. If a groove 18 is provided on the lower side, a ridge 17 is provided on the lower side of the segment on the other side. On the other hand, when the ridge 17 is provided on the upper side of each segment on both sides divided at the top (and the lowest part in the case of a circular section) of the tunnel section, the segment 10z of the top part (and the lowest part in the case of the circular section)
(See FIG. 2) is a ridge 17 on both sides or a groove 1 on both sides.
It becomes 8. In any of the above cases, the top or bottom segment 10z can be easily assembled by sliding the same as the other segments. Therefore, in the present invention, the phrase that the segment includes the ridge and the groove includes that only the ridge or the groove is limited to the above-mentioned top or lowermost segment.

In the above embodiment, wedge-shaped ridges 17 and grooves 18 are provided on the upper and lower sides of the segment 10 as connecting means. Good. Although the groove 18 needs to be formed over the entire width, the ridge 17 that meshes with the groove 18 does not need to have a length over the entire width.

Further, in the embodiment, the fitting method using the ridges 17 and the grooves 18 is adopted.
As shown in FIG. 6, flanges 30 and 31 each having bolt holes on the upper and lower sides of segment 10 'as connecting means.
And the flanges of the adjacent upper and lower segments can be connected by bolts 32. Similarly, on the left and right sides of the segment, instead of the projection and the notch, as shown in the segment 10 ″ in FIG.
6, the flanges of the segments adjacent to each other in the longitudinal direction of the tunnel can be connected by bolts 37.

In the embodiment, the inside of the rectangular frame 11 at the periphery of the segment is provided with a lightening hole 22 to form a lattice shape, but this also has a tortoiseshell shape as shown in FIG.
For example, as shown in FIG.
It can be set arbitrarily, and the point is that the individual lightening holes 22 '
Or 22 "may be small enough to prevent the broken concrete shards from falling.

[0024]

According to the first aspect of the present invention, a plurality of cast iron segments are connected by connecting means along the inner wall of the tunnel cross section to form a continuous wall including at least an arch-shaped portion. Since the wall structure is used, a plurality of segments cover the inner wall of the tunnel in a stretched state, and have an effect of preventing concrete from falling.

By forming the continuous walls in a plurality of rows in the longitudinal direction of the tunnel, a reinforcing wall can be formed over an arbitrary range of the length of the tunnel. By aligning the respective segments by the aligning means, the overall balance is improved and high assembly rigidity is obtained, and even if each row receives a local force, it is dispersed throughout.

According to a fourth aspect of the present invention, the inner wall of the cross section of the tunnel is made of cast iron, has a basic rectangular shape with a large curvature, has a first half of the connecting means on one of the upper and lower sides, and has the connecting means on the other. Of the inner wall of the tunnel having the second half of the first half, so that the adjacent segments are the first half and the second half.
By sequentially connecting and extending by connecting the halves, a reinforcing wall is formed along the inner wall of the tunnel section.

By forming the first half of the connecting means as a ridge along one of the upper and lower sides and the second half as a groove corresponding to the ridge, a plurality of segments can be simply relatively formed. The advantage is obtained that the reinforcing wall can be easily formed only by sliding and assembling. Alternatively, the first connecting means
The half portion and the second half portion can be easily extended along the inner wall of the tunnel cross section by using the flanges as the corresponding flanges so that the flanges can be bolted together.

Furthermore, the first half of the alignment means is provided on one of the right and left sides, and the second half of the alignment means is provided on the other side. As a whole, high assembly rigidity can be obtained. The alignment means automatically forms the projection and the notch when the segments of the second and subsequent rows are slid and assembled by making the first half a projection and the second half a notch corresponding to the projection. Lead together.

Further, by providing a lightening hole inside the rectangular frame defining the periphery, the material and weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a shape of a segment in an embodiment.

FIG. 2 is a diagram showing an example of a cross-sectional shape of a tunnel.

FIG. 3 is a diagram showing another example of a cross-sectional shape of a tunnel.

FIG. 4 is a diagram showing a connected state of segments in a circumferential direction.

FIG. 5 is a view showing a connected state of segments in a longitudinal direction of a tunnel.

FIG. 6 is a diagram showing a modification of the connected state of the segments in the circumferential direction.

FIG. 7 is a view showing a modification of the connected state of the segments in the longitudinal direction of the tunnel.

FIG. 8 is a diagram showing an example of the shape of a lightening hole of a segment.

[Explanation of symbols]

1, 1A, 1B Tunnel 3 Inner wall 5 Reinforcement wall 10, 10A, 10B, 10C, 10F, 10G, 10
H, segment 10a first segment 10b second segment 10c third segment 10z top segment 10 'segment 11 rectangular frame 12 upper side 13 lower side 14 left side 15 right side 17 ridge 18 groove 19 projection 20 notch 22, 22 ', 22 "Lightening holes 30, 31, 35, 36 Flanges 32, 37 Bolts

Claims (9)

[Claims] 1. A reinforcing wall structure for a tunnel inner wall, wherein a plurality of cast iron segments are connected by connecting means along an inner wall of a tunnel section to form a continuous wall including at least an arch-shaped portion. . 2. A method according to claim 1, wherein a plurality of cast iron segments are connected by connecting means along an inner wall of the tunnel section, and a plurality of continuous walls including at least an arch-shaped portion are formed in a longitudinal direction of the tunnel. Wall structure of the inner wall of the tunnel. 3. The reinforcing wall structure for an inner wall of a tunnel according to claim 2, wherein segments adjacent to each other in the longitudinal direction of the plurality of rows of tunnels are aligned by alignment means. 4. A tunnel made of cast iron and having a basic rectangular shape with a large curvature on the inner wall of the cross section of the tunnel, a first half of the connecting means on one of the upper and lower sides, and a second half of the connecting means on the other. A segment for reinforcing the inner wall of a tunnel, comprising: 5. A method according to claim 1, wherein a first half of said connecting means is a ridge along one of said upper and lower sides, and a second half is a groove corresponding to said ridge. 4. A segment for reinforcing the inner wall of a tunnel according to 4. 6. The first half and the second half of the connecting means are respectively corresponding flanges, each of which has a bolt hole and can be bolted. 4. A segment for reinforcing the inner wall of a tunnel according to 4. 7. The reinforcing segment for a tunnel inner wall according to claim 4, wherein one of the left and right sides is provided with a first half of the alignment means, and the other is provided with a second half of the alignment means. 8. A first half of said alignment means is a projection,
8. The reinforcing segment for a tunnel inner wall according to claim 7, wherein the second half is a notch corresponding to the protrusion. 9. The method according to claim 4, wherein a lightening hole is provided inside a rectangular frame defining a peripheral edge.
9. The reinforcing segment for a tunnel inner wall according to 7 or 8.