JP2003041895A - Tunnel lining repairing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel lining repairing structure which is for use in repairing existing lining formed of concrete or the like, and mounted on a tunnel inner surface, for instance, wherein the structure allows good follow-up observation and maintenance depending on changes occurring after the repair, and allows positive lining repairing with good working efficiency and in a short construction period. SOLUTION: The tunnel lining repairing structure is characterized in that banded repairing members 1 extending in a tunnel circumferential direction, are rigidly installed on an inner surface of lining F of an existing tunnel T along the same in a tunnel axial direction at predetermined intervals. Each banded repairing member 1 consists of a plurality of banded plates 2 with a predetermined length, serially arranged in the tunnel circumferential direction, for instance, and affixing plates 3 each rigidly connecting edges of the adjacent banded plates 2 together. As a means for fixing the banded repairing members 1, anchors are employed, for instance, and an adhesive 1 may be filled between each banded repairing member 1 and the inner surface of the tunnel lining as needed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a repair structure for a tunnel lining. More specifically, the present invention relates to a repair structure for repairing an existing lining made of concrete or the like on the inner surface of the tunnel.

[0002]

2. Description of the Related Art In general, the inner surface of a tunnel is lined with concrete (lining concrete), and the lining is deteriorated due to changes in earth pressure and spring water conditions over time or long-term use. , Repair is needed. In addition, cavities on the backside of the lining caused by the construction method, etc. are also a cause of deterioration over time of the tunnel lining.

Conventionally, as a measure for recovering the deterioration of the lining function due to aging etc., an adhesive is injected into the cracked portion and backfilling injection is performed on the back surface of the lining.
Construction methods such as re-placing concrete after removing the lining deterioration site, spraying and reinforcing with fiber reinforced concrete, or installing a PC plate or steel plate inside the lining are used.

However, in all of the above-mentioned conventional methods, the entire inner surface of the lining at the repaired portion is covered with the repair material, so that there is further deterioration over time after construction, or if sufficient repair effects cannot be obtained. However, there was a problem that the follow-up observation such as cracking, which is an initial sign of lining deformation, could not be performed at all. Therefore, adopting the conventional construction method for these tunnels, in which follow-up is not possible at all, leaves a big problem in terms of maintenance and economic efficiency.

Further, in order to carry out the above-mentioned conventional construction method, a large construction machine or the like is required regardless of the size of the repaired place, so that, for example, in a tunnel in use, it is obliged to keep the road closed or regulate lanes. There was a problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems, and it is possible to favorably carry out follow-up observation and maintenance for a new deformation occurring after repair. It is an object of the present invention to provide a tunnel lining repair structure capable of performing reliable lining repair with good workability and a short construction period.

[0007]

In order to achieve the above object, the tunnel lining repair structure according to the present invention has the following structure. That is, a band-shaped repair material extending in the tunnel circumferential direction is installed and fixed along the inner surface of the existing tunnel lining at predetermined intervals in the tunnel axis direction. The band-shaped repair material is composed of, for example, a plurality of band plates arranged in the circumferential direction of the tunnel and having a predetermined length, and a splicing plate for connecting and fixing the ends of the adjacent band plates. An anchor, for example, is used as a fixing means for the strip-shaped repair material, and an adhesive is interposed between the strip-shaped repair material and the inner surface of the tunnel lining, if necessary. Furthermore, if necessary, rock bolts are placed in the ground around the tunnel,
The lock bolt and the strip-shaped repair material 1 may be connected and fixed to each other.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A tunnel lining repair structure according to the present invention will be specifically described below with reference to the embodiments shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of a tunnel lining repair structure according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a longitudinal sectional view thereof, FIG. 4 is a partially enlarged view thereof, and FIG. (a) is an enlarged view of a part thereof, and (b) and (c) of the same are bb and cc sectional views in (a).

In this embodiment, a strip-shaped repair material 1 extending in the tunnel circumferential direction is installed along the upper inner surface of a concrete lining F in an existing tunnel T at predetermined intervals in the tunnel axis direction. Is. The interval (pitch) may be appropriately set according to the situation of the lining F to be repaired, for example, a slightly wider pitch P1 in a place with little deterioration and a narrow pitch P in a place with deterioration less than that.
It should be installed in 2.

In the present embodiment, each strip-shaped repair material 1 connects a plurality of strip plates 2 (4 in the figure) arranged side by side in the circumferential direction of the tunnel and the end portions of the strip plates 2 adjacent to each other. The fixing plate 3 is fixed. Although the material and thickness of the strip 2 and the splicing plate 3 are appropriate, in the present embodiment, hot-dip galvanized steel sheets each having a thickness of about 4.5 mm are used. Also, the strip 2 and the splicing plate 3
In the present embodiment, is formed in advance in a substantially arcuate shape in accordance with the curved surface shape of the inner surface of the tunnel lining.

FIGS. 7 (a) and 7 (b) are plan views of the strip plate 2 and the splicing plate 3 in the developed state,
Although the width and the length dimension thereof are appropriate, in the present embodiment, the width W of the strip plate 2 and the splicing plate 3 is about 40, respectively.
The length L of the strip 2 is about 2710 mm,
The length L1 of the splicing plate 3 is formed to be about 330 mm.

As shown in FIG. 7 (a), mounting holes 2a for the lining F are provided in the vicinity of both sides in the width direction of each strip 2, and an injection hole for filling an adhesive material described later is provided in the center in the width direction. Hole 2b
Are provided at predetermined intervals in the longitudinal direction. Further, the attachment holes 3a are provided at the four corners of the splicing plate 3.
However, injection holes 3b for filling the adhesive are formed in the central portion.

Bands 2 adjacent to each other in the circumferential direction of the tunnel.
Is installed at a predetermined distance d as shown in FIGS. 7 (c) and 5 (a), and is set to about 10 mm in this embodiment, and the splicing plate 3 is superposed in that state. At this time, the mounting hole 3a of the splicing plate 3 and the mounting hole 2a of the strip plate 2 are aligned with each other, and the injection hole 3b of the splicing plate 3 is located between the adjacent strip plates 2 and 2.

The attachment means of the belt-shaped repair material 1 to the lining F is appropriate, but in the present embodiment, a well-known expansion type anchor 4 is used. That is, as shown in FIG. 6 (a), a small hole h is drilled in the inner surface of the lining F corresponding to each mounting hole 2a of the strip 2 by a drill or the like, and the truncated cone-shaped wedge 41a is formed in the small hole h. A cylindrical sleeve 42 fitted with the attached bolt 41 is driven in, the tip end portion of the sleeve 42 is expanded and fixed by the wedge 41a, and the nut 5 is screwed into the bolt 41 protruding from the sleeve 42, as shown in FIG. It is configured to be tightened and fixed as shown in. In addition, the attachment plate 3 has its mounting holes 3a aligned with the mounting holes 2a of the strip 2 and has both mounting holes 2a.
The bolt 41 of the anchor 4 driven in the same manner as described above may be inserted into a and 3a, and the nut 5 may be screwed into the bolt 41 and fixed together. A cap 6 or the like may be provided on the projecting portions of the nuts 5 and the bolts 41 as necessary, and the fixing means thereof is appropriate. For example, the nuts 5 and It suffices to cover the protruding portion of the bolt 41 and fix it by adhesion.

If necessary, an adhesive 7 or the like may be interposed between the strip 2 and the lining F, and the material and construction method of the adhesive 7 are appropriate. In the above, the epoxy resin adhesive is injected between the strip plate 2 and the lining F through the injection pipes 8 with seats through the injection holes 2b and 3b formed in the strip plate 2 and the splicing plate 3 so as to be solidified. It is the one.

In this case, if necessary, the edge of the strip 2 is covered with a sealing material 9 or the like so that the adhesive injected between the strip 2 and the lining F does not leak from the edge of the strip 2. It is advisable to inject the adhesive from the above. In the present embodiment, as shown in FIGS. 5B and 5C, the entire circumference of the edge portions of all the strips 2 except the end portions of the strips 2 adjacent to each other and the splicing plate. 3, both sides in the width direction are closed by the putty-like sealing material 9.

Instead of filling the adhesive between the strip 2 and the lining F as described above, for example, an adhesive layer may be applied in advance on the contact surface side of the strip 2 with the lining F. Form and bond,
Alternatively, the double-sided adhesive material may be interposed between the strip 2 and the lining F for adhesion.

When a plated steel plate is used as the strip plate 2 of the strip-shaped repair material 1 as in the above embodiment and is fixed to the inner surface of the lining F with the adhesive material 7, the plating of the adhesive portion is removed beforehand. If the adhesive is applied afterwards, the bonding strength between the adhesive and the strip 2 can be improved.

Further, as shown in FIG. 8, for example, when a rock bolt 10 or the like is driven in the ground around the tunnel in order to reinforce the ground itself around the tunnel, the lock bolt 10 and the belt-shaped repair material 1 described above. If and are linked together,
The repair and reinforcement effect can be further increased. In this case, since the strip-shaped repair material 1 is installed along the inner circumferential surface of the tunnel lining F, for example, as shown in FIG. The lock bolt 10 and the strip-shaped repair material 1 can be easily connected only by inserting the square washer 11 and the like into the screw and tightening the nut 12 by screwing the nut 12 into the male screw formed at the end. In this case, the lock bolt 10 does not necessarily need to be connected to the strip-shaped repair material 1, and can be mounted independently of the strip-shaped repair material 1 on the existing lining portion between the strip-shaped repair materials 1 and 1 adjacent in the tunnel axis direction. You may.

In the above embodiment, four strips 2 are arranged side by side as the strip-shaped repair material 1 in the circumferential direction of the tunnel T, but the number of strips is appropriate, and in some cases, one strip is provided in the circumferential direction of the tunnel. It may be constituted by a strip plate, in which case the splicing plate 3 may be omitted.

Further, the material of the strip 2 and the splicing plate 3 constituting the strip-shaped repair material 1 is not limited to the galvanized steel sheet, but carbon fiber (carbon fiber), FRP (fiber reinforced plastic) or the like may be used. it can.

[0023]

As described above, in the tunnel lining repair structure according to the present invention, the strip-shaped repair material 1 is installed along the inner surface of the existing tunnel lining at a predetermined interval in the tunnel axis direction. Therefore, the tunnel lining F can be easily and reliably repaired and reinforced by the rigidity of the belt-shaped repair material 1. It is also optimal as a lining support material during backfilling when the existing lining thickness is thin. Further, since the strip-shaped repair material 1 does not cover the entire inner surface of the tunnel lining, the state of the lining can be easily visually observed even after the repair. Therefore, it is possible to easily confirm the repair effect after construction and the changes over time, especially the occurrence of cracks and spring water, and to easily and surely perform emergency measures and maintenance for them. You can

Further, since the required repair and reinforcement effect can be obtained only by adjusting the installation pitch of the strip-shaped repair material 1 in the direction of the tunnel axis, the versatility is high and the installation is easy even when the tunnel is curved. be able to. In addition, material costs and construction costs are lower than other conventional construction methods,
Further, the tunnel space is not narrowed as in the case of installing a supporter made of H-shaped steel or the like on the inner surface of the lining.

In addition, at the time of construction, since it is only necessary to bring the strip-shaped repair material that has been cut into a predetermined length to the site and install it, a large construction machine or the like is not required and the construction is easy.
Moreover, there is an effect that a tunnel in use can be constructed without being obstructed or under heavy traffic regulation.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a tunnel lining repair structure according to the present invention.

FIG. 2 is a plan view of the tunnel lining repair structure.

FIG. 3 is a vertical cross-sectional view of the tunnel lining repair structure.

FIG. 4 is an enlarged view of a part of the tunnel lining repair structure.

FIG. 5A is an enlarged view of a part of the tunnel lining repair structure. (B) and (c) are b in (a)
-B, cc sectional drawing.

FIG. 6A is an explanatory view of a state in which an anchor is driven.
(B) is sectional drawing in the state which attached the strip | belt-shaped repair material with the anchor.

FIG. 7A is a plan view of a strip plate. (B) is a plan view of the attachment plate. (C) is a top view of a strip connection part.

FIG. 8 is a vertical cross section of an example in which a rock bolt for ground reinforcement is installed.

FIG. 9 is an enlarged view of a connecting portion between the lock bolt and the strip-shaped repair material.

[Explanation of symbols]

1 band repair material 2 strips 3 attachment plates 2a, 3a mounting holes 2b, 3b injection hole 2 anchor 5 nuts 6 caps 7 Adhesive 8 injection pipes 9 Seal material 6 Rock bolt T tunnel F lining

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Tateno             4-9-12 Choja-cho, Naka-ku, Yokohama-shi, Kanagawa             Ceremony company KFC (72) Inventor Morihiko Ota             Sankoko 1-8-9 Kameido, Koto-ku, Tokyo             Inside Nsartanto Co., Ltd. (72) Inventor Osamu Aikawa             Shobo, 3-18 Kandanishikicho, Chiyoda-ku, Tokyo             Indo Construction Co., Ltd. F-term (reference) 2D055 CA03 KB04 KB11 KB13 LA16

Claims (5)

[Claims] 1. A tunnel lining repair structure, wherein strip-shaped repair materials extending in the tunnel circumferential direction are installed and fixed along an inner surface of an existing tunnel lining at predetermined intervals in the tunnel axis direction. 2. The strip-shaped repair material comprises a strip plate arranged in a line in the circumferential direction of the tunnel, and a splicing plate for connecting and fixing the end portions of the strip plates adjacent to each other. Tunnel lining repair structure. 3. The tunnel lining repair structure according to claim 1, wherein the strip-shaped repair material is fixed to the inner surface of the tunnel lining with an anchor. 4. The tunnel lining repair structure according to claim 1, wherein an adhesive is interposed between the strip-shaped repair material and the inner surface of the tunnel lining. 5. The tunnel lining repair according to any one of claims 1 to 4, wherein a rock bolt is driven in the ground around the tunnel, and the lock bolt and the strip-shaped repair material 1 are connected and fixed to each other. Construction.