JPH07229393A - Bolt box cover for shield segment - Google Patents

Abstract

PURPOSE:To easily fit a cover after the assembly of a segment and save labor and material by pasting a slide member to the opposite corners of a bolt box before assembling the segment. CONSTITUTION:Regarding a cover for closing a bolt box to connect tunnel segments in the shield driving method, slide members 4 and 4 are pasted to the opposite corners of the bolt box before the assembly of the segments. Thereafter, a cover body 3 is slid and inserted through the slide members 4 after the assembly of the segments. In this case, the slide members 4 are formed to have adjacent slopes 41 and 41 of the same gradient as the corners of the bolt box as well as grooves 42 and so forth with a stopper corrugation on the internal surface. In addition, the cover body 3 is provided with a bolt cavity 31 and projection banks 33 and so forth having a stopper corrugation at both sides for slidable insertion into the grooves 42 of the slide members 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for closing a bolt box of a segment constituting a tunnel constructed by a shield construction method.

[0002]

2. Description of the Related Art Generally, a tunnel by a shield construction method is formed by connecting segments 1 which are divided into circles as shown in FIG. (A) in the same figure is a view of the segment 1 as seen from the inner surface of the tunnel, (B) is a side view as seen from the lower side of (A), and the left half is a sectional view taken along the line AA of (A). This segment 1 is to assemble adjacent segments regularly and firmly according to the scale of the tunnel.
A required number of concave bolt boxes 2 are provided in each segment 1, and the adjacent segments 1 are connected from the bolt boxes 2 through bolt holes 21 by connecting bolts. The bolt box 2 of the connected segment 1 is filled with mortar or the like or filled with a molded product such as urethane foam so that the inner surface of the tunnel becomes uniform.

As a reason for performing such a treatment, in the shield tunnel, in the case where there is a risk of water leakage from the connecting portion of the segment 1, conventionally, a waterproof sheet is attached to the surface of the tunnel, and then secondary winding concrete is applied. Is being placed.

[0004]

As a method of attaching the waterproof sheet to the inner surface of the tunnel, conventionally, a method of nailing using an air gun or a gunpowder, and a method of driving an anchor bolt into the segment 1 to fix it. Alternatively, a method of burying a nut member in advance in the segment 1 and fixing it with an insert bolt has been adopted. In either method, the segment 1 must be damaged or the segment 1 must be subjected to complicated processing. There wasn't.

In particular, it is extremely difficult to damage the segment 1 which is required to have high strength, such as a submarine tunnel, and it is extremely difficult to perform complicated processing for reducing the strength. Therefore,
There has been a demand for a technique that allows a waterproof sheet to be easily attached to a shield tunnel.

As a solution to the above-mentioned problems, the actual Kaihei 5-
77394, Japanese Utility Model Laid-Open No. 5-64297, JP-A 5-1
As seen in No. 0639, there is proposed a technique of covering the bolt box 2 after the segment is assembled. Bending insertion, fitting, or attachment of the lid by adhesion requires an extremely large amount of labor for bending insertion, fitting, and adhesion in the field in the actual work, and this is also not preferable.

[0007] In the well-known bonding method, it is necessary to leave it until the strength to support the mortar or the like to be injected in the next step is obtained, and there is a problem in terms of construction period.

The present invention solves the above-mentioned problems, and after mounting the segment of the shield tunnel, the bolt box 2
Instead of filling the filling material with the filling material, the slide member 4 is attached by a simple operation after forming before the segment loading or during stocking after the segment loading, and after assembling, the lid body 3 is slidably inserted and the bolt box An object of the present invention is to provide a lid capable of closing 2.

[0009]

In order to solve the above-mentioned problems, in a lid that closes a bolt box 2 for connecting the segments 1 of a shield tunnel, the corners of the bolt box 2 facing each other before the segments are assembled. The slide member 4 is attached to the portion, and the lid body 3 is slidably inserted through the slide member 4 after the segment is assembled.

The slide member 4 has an adjacent inclined surface 41 having the same inclination as the inclined side surface of the corner portion of the bolt box 2, and a diagonal surface passing through the intersecting side of the two surfaces, and 2 From the side opposite to the side where the surfaces intersect, a groove 42 is formed on the inner surface of which a retaining fold 43 is formed.

The lid body 3 is box-shaped, and the surface plate is the segment 1.
Is formed on the side surface plate so as to form substantially the same surface as the inner surface of the slide box 4. The bolt cavity 31 is provided at a position corresponding to the bolt hole 21 of the bolt box 2, and the groove 42 of the slide member 4 is provided at the corner portion. It is provided with a jetty 33 having slip-off prevention folds 34 formed on both side surfaces so as to be slidably inserted into.

Incidentally, a packing groove 32 into which a rubber packing is fitted is formed on the side surface of the lid main body 3 all around, and a surface is provided with an injection hole for mortar or the like, or an electric wire or the like. There are those that are equipped with metal fittings for suspending.

[0013]

As described above, since the slide member is bonded to the inside of the bolt box before the segment is assembled in the field, after the assembly, the lid main body is slid and inserted along the slide member, and the inner surface of the segment is It is possible to finish on the same surface as the surface of the lid of the bolt box.

[0014]

1 is a structural view of an embodiment of a lid of a bolt box of a shield segment of the present invention, (a) is a three-sided view of a lid main body, and (b) is a three-sided view of a slide member. (I)
The slide member indicated by the alternate long and short dash line in Fig. 1 shows the relative relationship with the lid body, and is actually in a state of being in close contact with the corner portion of the lid body. FIG. 2 is a view showing a state where a slide member is bonded to the bolt box.

The lid of the bolt box comprises a slide member 4 attached to diagonally opposite corners of the bolt box 2 and a lid body 3 slidably inserted into the bolt box 2 via the slide member 4.

The slide member 4 passes through a side where the two inclined surfaces 41 and the adjacent inclined surface 41 having the same inclination as the inclined side surface of the corner of the bolt box 2 intersect.
A groove 42 is formed along the diagonal surface of the above, and from the side opposite to the side where the two surfaces intersect with each other, on the inner surface of which a retaining fold 43 is formed.

Therefore, in this embodiment, the groove 42 is formed so as to be perpendicular to the bottom surface of the bolt box 2, and the opposed grooves 42 are held parallel to each other.

The lid body 3 is box-shaped, and the surface plate is the segment 1.
Is formed on the side surface plate so as to form substantially the same surface as the inner surface of the slide box 4. The bolt cavity 31 is provided at a position corresponding to the bolt hole 21 of the bolt box 2, and the groove 42 of the slide member 4 is provided at the corner portion. And a jetty 33 having slip-off prevention folds 34 formed on both sides so as to be slidably inserted.

The retaining fold 4 of the groove 42 of the slide member 4 described above.
3, the retaining folds 34 of the jetty 33 of the lid body 3 are configured such that the side of the retaining folds 43 on the groove 42 side is an inclined surface and the opposite side is a vertical surface, and the jetty 33 side is a tip to be inserted. Since the side is an inclined surface and the opposite side is a vertical surface, it is configured so as not to fall off once inserted.

A packing groove 32 into which a rubber packing is fitted is formed on the entire side surface of the lid body 3 near the surface. Further, there is a surface provided with an injection hole such as mortar or the like, or a surface provided with a metal fitting for suspending an electric wire or the like.

The slide member 4 and the lid body 3 are made of, for example, hard vinyl chloride, polyethylene, polypropylene or the like.

Next, a method of mounting the above-mentioned bolt box lid will be described. First, at the time of manufacturing the segment 1 or when carrying it in and stocking it at the site, as shown in FIG. 2, the slide members 4 are diagonally opposed to the respective bolt boxes 2, and the grooves 42 thereof are opposed to each other. Glue with glue in the direction.

The segment 1 to which the slide member 4 is adhered
Are assembled and bolts (not shown) are passed through the bolt holes 21, and nuts are tightened in the bolt cavities 31 to firmly connect adjacent segments 1 to each other.

After this connection work is completed, the jetty 33 of the lid body 3 is inserted into the groove 42 of the slide member 4 adhered in each bolt box 2 so that the inner surface of the segment 1 and the surface of the lid body 3 are separated from each other. Finish to match.

In this case, the packing groove 3 is formed in the lid body 3.
2 is open, insert the rubber packing and then insert into the bolt box 2.

Another embodiment of the lid of the bolt box of the present invention is shown in FIG. In this embodiment, it is necessary that the side surfaces of the bolt box 2 are parallel vertical surfaces. The slide member 5 is slanted to the two surfaces facing each other on this side surface.
Glue them so that they are parallel to each other.

After the segment 1 is assembled, the jetty 61 of the lid body 6 having a triangular side surface is inserted into the groove 51 of the slide member from the diagonal direction of the bolt box 2 so that the surface of the lid body 6 and the inner surface of the segment 1 are aligned with each other. To finish. Even in this case, needless to say, the retaining folds as shown in FIG. 3 are formed on the opposing surface of the groove 51 and both side surfaces of the jetty 61, respectively.

[0028]

As described above, when the bolt box is closed, the slide member is adhered before the assembling of the segment, so that the adhering work is complete and there is no risk of falling off. Further, after the segment is assembled, only by slidingly inserting the lid main body into the slide member, the work is easy and the labor and materials of the operator can be reduced.

Even when the waterproof sheet is attached, the surface of the lid main body can be made substantially flush with the inner surface of the segment, so that the waterproof sheet can be attached without making holes.

If the waterproof sheet and the secondary winding process are not performed, the appearance will be very good if the lid main body having the same color as the segment is used.

[Brief description of drawings]

FIG. 1 is a structural view of an embodiment of a lid of a bolt box of a shield segment of the present invention, in which (a) is a three-sided view of the lid main body,
(B) is a trihedral view of the slide member. The slide member indicated by the alternate long and short dash line in (a) shows the relative relationship with the lid body, and is actually in a state of being in close contact with the corner portion of the lid body.

FIG. 2 is a state diagram in which a slide member is bonded to a bolt box.

FIG. 3 is an explanatory view of a groove of a slide member and a retaining fold of a jetty of a lid body.

FIG. 4 is a structural view of a segment, in which (a) is a view of the segment from the inside of the tunnel, (b) is a side view of the bottom of (a), and the left half is A-A of (a). FIG.

FIG. 5 is a structural diagram of another embodiment of the lid of the bolt box of the shield segment of the present invention.

[Explanation of reference symbols] 1 segment 2 Bolt box 3 Lid main body 31 Bolt cavity 32 Packing groove 33 Jetty 34 Crease fold 4 Sliding member 42 Groove 43 Sediment crease 5 Slide member 51 Groove 6 Lid body 61 Jetty

Claims (4)

[Claims] 1. A lid for closing a bolt box for connecting segments of a shield tunnel, wherein slide members are attached to opposite corner portions of the bolt box before the segment is assembled, and after the segment is assembled. The lid member is slidably inserted through the slide member, and the slide member has two adjacent surfaces having the same inclination as the inclined side surface of the corner portion of the bolt box, and an intersecting side of these two surfaces. Along the diagonal surface of the slide member passing through, and from the side opposite to the side where the two surfaces intersect, a groove having a retaining fold is formed on the inner surface, and the lid body is a box type. , The surface plate is formed of a surface that forms substantially the same surface as the inner surface of the segment, and the side plate includes bolts provided at positions corresponding to the bolt holes of the bolt box. A lid for a bolt box of a shield segment, comprising: a cavity for use and a ridge having a fold-off fold formed on both sides so as to be slidably inserted into a groove of the slide member at a corner portion. 2. The lid of the bolt box of the shield segment according to claim 1, wherein a packing groove into which a rubber packing is fitted is formed on a side surface of the lid main body over the entire circumference. 3. The cover of the bolt box of the shield segment according to claim 1, wherein an injection hole for mortar or the like is formed on the surface of the cover body. 4. The lid of the bolt box of the shield segment according to claim 1, wherein a metal fitting for suspending an electric wire or the like is provided on a surface of the lid main body.