JP3462065B2 - Segment joining metal fitting, segment, and segment joining method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining fitting for joining segments used for constructing a tunnel or the like, a segment including the joining fitting, and a joining method for the segments.

[0002]

2. Description of the Related Art The applicant of the present invention previously developed a hexagonal segment shown in FIGS. 7 to 10 (Japanese Patent Application No. 8-2).
No. 38258. ) The hexagonal segment is fixed to the web 42a of the H-shaped steel 42 by fixing the joining metal fitting 41 in which the head portion 41b is formed on the outer end of the metal fitting body 41a to the corners of the two inclined joining surfaces Ka, Kb, A fitting portion 43b into which the head 41b of the joining metal fitting 41 is fitted is provided on the web 43a of the channel steel 43 provided with the side joining surfaces Ga and Gb, and one of the hexagonal segments S1 of the first sheet is provided. One slanted joint surface Ka of the second hexagonal segment S2 is butted to the slanted joint surface Kb, and the fitting portion 43b of the first hexagonal segment S1 is fitted to the joint fitting 41 of the second hexagonal segment S2. Head 4
1b is fitted and joined to each other, and the third side hexagonal segment S3 is made to abut its side joint surface Ga to the side joint surface Gb of the first hexagonal segment S1 and the second hexagonal segment S3 is joined. Hexagonal segment S2 of the above fitting 41
The fitting portion 43b of the side joint surface Ga is fitted to the head 41b of the hexagonal segment and the one inclined joint surface Ka is butted against the other inclined joint surface Kb of the second hexagonal segment S2. S1, S2 and S3 can be joined together. The hexagonal segment is curved in an arc shape in a side view as shown in FIGS. 8 and 9.

With this new hexagonal segment, a strong joining force can be obtained, and for example, even if the tunnel constructed by the hexagonal segment is a channel, it can sufficiently withstand the water pressure from the center to the outside. .

[0004]

However, if the segments are simply joined as described above, water leaks from the gaps of the joining metal fittings, etc. Therefore, caulking agents such as mortar are used to prevent water leakage. It is not easy to fill the caulking agent into the bent gap between the joint fittings,
There is a problem that it takes time and effort.

It is an object of the present invention to provide a segment joining piece, a segment, and a segment joining method capable of accurately and easily filling a gap between joining pieces with a caulking agent.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 is a male type in which a head is fitted into a fitting portion of a female type fitting to join segments together. In the segment joint fitting, a caulking agent insertion hole is formed in the head along the fitting direction of the head into the fitting portion. According to a second aspect of the present invention, there is provided a female segment joint fitting for joining segments by fitting the fitting portion to a head of the male joint fitting, wherein the male joint fitting is connected to the fitting portion. The push-out protrusion inserted into the insertion hole formed in the head portion is provided so as to project in the fitting direction of the fitting portion with respect to the head portion.

In the above means, when the fitting portion of the female joint fitting is fitted into the head of the male joining fitting, the extrusion protrusion provided in the fitting portion is inserted into the insertion hole formed in the head. When they are fitted together, the caulking agent previously put in the insertion hole is pushed out by the extrusion protrusion into the surrounding gap.

According to a third aspect of the present invention, the segment metal fittings according to the first aspect are provided at corners of two inclined joint surfaces,
According to a second aspect of the present invention, the segment metal fitting is provided on at least one of the side joint surfaces that are substantially parallel to each other. According to a fourth aspect of the present invention, the segment joint fitting according to the first aspect is provided substantially at the center of the end joint surface, and the segment joint fitting according to the second aspect is provided on at least one of the side joint surfaces that are substantially parallel to each other. The configuration provided in.

In the above means, when the segments are joined together, the caulking agent in the insertion holes is pushed out into the surrounding gap by inserting the extrusion protrusions into the insertion holes.

According to a fifth aspect of the present invention, the head portion of one male joint fitting of the second segment is fitted into the fitting portion of one female joint fitting of the first segment, and the head portion is fitted. It is formed on the head of the male joining fitting when joining the fitting portions of one female joining fitting of the third segment to join the three segments according to claim 3 or 4. By inserting the extrusion protrusion provided in the fitting portion of the female joint fitting into the insertion hole, the caulking agent in the insertion hole and / or the storage hole connected to the insertion hole is pushed out into the gap between the joint fittings. It is configured to be joined.

According to this means, it is not necessary to fill the space between the joint fittings with the caulking agent after joining the three segments.

In the above segment joining method, it is preferable that the caulking agent is encapsulated in a capsule which is broken by inserting the extrusion protrusion into the insertion hole (claim 6). With this configuration, it is not necessary for the worker to inject the caulking agent into the insertion holes one by one, and moreover, a predetermined amount of the caulking agent can be filled into the gap without excess or deficiency regardless of the amount of division. Further, it is desirable that the caulking agent be an adhesive liquid that hardens to close the gap (Claim 7). In this case, the caulking agent enhances the bonding force.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 to 6 show an embodiment of the present invention, in which reference numeral 1 is a male joint fitting made of steel or the like. The joining fitting 1 is provided with a head 1b at the tip of the fitting body 1a, and a circular insertion hole 1c is formed in the head 1b along the thickness direction of the head 1b (left and right direction in FIGS. 2 and 3). It will be done.

Further, reference numerals 2 and 3 are female joint fittings made of steel or the like. One of the joining fittings 2 is formed by providing a fitting portion 2b on one outer surface of the fitting body 2a, and the other joining fitting 3 is
A fitting portion 3b is provided on one outer surface of the metal fitting body 3a, and a circular extrusion protrusion 3c is provided on the fitting portion 3b in the depth direction of the fitting portion 3b (left-right direction in FIGS. 2 and 3). It will be done.

The head part 1b of the fitting 1 and the fitting parts 2b and 3b of the fittings 2 and 3 are fitted to one head part 1b with the two fitting parts 2b and 3b facing each other. Their shapes are defined so that they fit together. Further, the insertion hole 1c of the joint metal fitting 1 and the push-out projection 3c of the joint metal fitting 3 have such a size and position that the push-out projection 3c is inserted into the insertion hole 1c in the above-mentioned fitted state of the joint metal fittings 1, 2 and 3. Has been defined.

When the segment is a hexagonal segment Sa, the male joining member 1 has its center line at the corner of the two inclined joining surfaces Ka and Kb as shown in FIGS. 2 to 5. In the case of the quadrangular segment Sb, the quadrangular segment Sb is projected at the center of the end joining surface T with its center line aligned with the center line of the segment Sb, as shown in FIG. The quadrangular segment Sb is curved in an arc shape in a side view, like the hexagonal segment Sa.

Further, one of the female joint fittings 2 is provided on the side joint surface Gb as shown in FIGS. 2 to 6 for both the hexagonal segment Sa and the quadrangular segment Sb, and the other female joint fitting 2 is provided. The mold joining fitting 3 is provided on the other side joining surface Ga.

The female joint fitting 2 and the segment Sa are
As shown in FIG. 4 and FIG. 5, the storage holes 2c, s are provided as necessary.
c is formed so as to be continuous with the insertion hole 1c. The storage hole may be formed only in the joint fitting 2. In either case, the length of the extrusion protrusion 3c is increased by the length of the storage holes 2c and sc. The rectangular segment Sb can also have the same configuration as above.

Reference numeral 5 is a capsule. A caulking agent c is packed in the capsule 5. Caulking agent c
For this, a resin adhesive such as a solution type adhesive that hardens to bond the metal fittings 1, 2, 3 and the like, or a resin adhesive such as a two-component type adhesive that produces an adhesive force by polymerization of two liquids is mainly used. It is not limited. The caulking agent-containing capsule 5 is easily broken by compression by the extrusion protrusion 3c, and is used by being housed in the insertion hole 1c and / or the housing holes 2c, sc.

When inserting a plurality of capsules 5 into the insertion holes 1c or the like, they may be inserted side by side in the length direction of the holes as shown in FIG. 4 or may be put in a radial direction as shown in FIG. The two capsules 5 in FIGS. 4 and 5 can be considered as capsules having the same content liquid, or different capsules of a two-component adhesive having different content liquids.

The joining of the hexagonal segments Sa provided with the joining metal fittings 1, 2, 3 is basically the same as in the case of FIG. 7, and the first hexagonal segment Sa (lower left in FIGS. 2 to 5). (Segment) one slanted joint surface Kb and one slanted joint surface Ka of the second hexagonal segment Sa (the upper segment in FIGS. 2 to 5) are butted against each other to join the first hexagonal segment Sa. The head portion 1b of the fitting 1 for the second hexagonal segment Sa is fitted into the second fitting portion 2b, and the third hexagonal segment Sa (the lower right segment in FIGS. 2 to 5) is The side joint surface Ga is 1
The side fitting surface Gb of the second segment Sa is abutted, and the extrusion protrusion 3c of the fitting 3 is inserted into the insertion hole 1c to join the head 1b of the fitting 1 of the second hexagonal segment Sa to the head 1b. The three fitting portions 3b are fitted together, and one inclined joint surface Ka is butted against the other inclined joint surface Kb of the second segment Sa.

The extrusion protrusion 3c inserted into the insertion hole 1c at the time of this joining operation breaks the capsule 5 to insert the caulking agent c into the insertion hole 1c (in the case of FIG. 2), the insertion hole 1c and the storage hole 2c.
It is extruded from sc (in the case of FIGS. 4 and 5) into the gap g between the joint fittings 1, 2, and 3. At this time, the caulking agent c is extruded onto the central portion of the gap g in the segment thickness direction.
Since it is strongly extruded by c, it spreads evenly over the entire gap g and closes the gap g reliably. In addition, the insertion hole 1c or the extrusion protrusion 3c inserted into the insertion hole 1c and the storage portions 2c and sc strengthens the joining force between the segments. Further, when the caulking agent c is an adhesive, the adhesive also enhances the bonding strength.

The joining of the rectangular segments Sb is the same as that of the hexagonal segment Sa except that the end joining surfaces T are brought into contact with each other. 2 to 6, the left is the wellhead side and the right is the face side.

The present invention is not limited to the above, but can be modified as follows, for example.

That is, the insertion hole 1c (accommodation hole 2c,
sc) and two extrusion protrusions 3c are provided, but any number may be used as long as it is one or more. Note that the total volume of the holes 1c, 2c, and sc is usually the expected gap g of the joint fittings 1, 2, and 3.
Is sufficiently larger than the total volume of Also, the holes 1c, 2
The cross-sectional shapes of c and sc and the extrusion protrusion 3c are circular as described above, but other shapes may be used. The extrusion protrusion 3c may be tapered and the holes 1c, 2c, and sc may be tapered. In some cases, the caulking agent c is not put in the capsule 5 and the holes 1c, 2c, and sc are directly added.
May be injected into.

The segments Sa and Sb are generally made of precast concrete, but the material of the main part is not limited to concrete, but other materials such as steel plates may be used. The hexagonal segments Sa shown in FIGS. 2 to 5 are regular hexagons facing each other like the segments shown in FIG.
The corner segment is extended in the protruding direction, and the quadrangle segment Sb in FIG. 6 is an elongated shape in which a regular quadrangle is extended in one direction. The shape other than the above, for example, a hexagon or a quadrangle in which the side joint surfaces Ga and Gb are not exactly parallel to each other may be used. Further, it may be flat and not curved in an arc shape. Therefore, the segments Sa, S of the present invention
b can also be used as a retaining wall block or floor plate as well as a tunnel lining.

Heads 1b of fittings 1, 2 and 3 and fitting portion 2
The shapes of b and 3b are not limited to those shown in the figures, but can be variously changed. The female joint fittings 2 and 3 can be the grooved steel 43 of FIG. 7.

[0028]

As described above, according to the first and second aspects of the invention, a caulking agent such as an adhesive is filled in the gap without any trouble during the joining operation to enhance the liquid tightness. ,
Further, it is possible to obtain a segment that can be firmly joined.

According to the third and fourth aspects of the present invention, it is possible to construct a tunnel or the like having excellent liquid tightness and high joint strength in an elegant manner.

According to the invention of claim 5, since the caulking agent is automatically filled in the gap during the joining operation of the segments, compared with the conventional filling method in which the caulking agent is filled in another step. The segment joining work can be performed efficiently. In addition, the caulking agent is pushed out to the central portion of the gap with a strong force and evenly spreads throughout the entire gap, so that water leakage can be more reliably prevented and a strong bonding strength can be obtained.

In the segment joining method of claim 5,
When the caulking agent is contained in a capsule, it is not necessary for an operator to inject the caulking agent into the insertion hole or the like one by one, and moreover, a predetermined amount of the caulking agent can be filled into the gap without excess or deficiency irrespective of the measurement amount. If an adhesive is used as the caulking agent, the segments will be joined more firmly.

[Brief description of drawings]

FIG. 1 is an external view of a male joint fitting and a female joint fitting.

FIG. 2 is a cross-sectional view showing a joining operation state of hexagonal segments.

FIG. 3 is a cross-sectional view of the hexagonal segment after joining is completed.

FIG. 4 is a sectional view showing a joining operation state of another hexagonal segment.

FIG. 5 is a cross-sectional view when two capsules are radially overlapped and placed in an insertion hole or the like.

FIG. 6 is a plan view showing a joining operation state of square segments.

FIG. 7 is a partially cutaway plan view of a hexagonal segment using H-shaped steel and grooved steel.

8 is a cross-sectional view of the (VIII-VIII) portion of FIG.

9 is a side view of the segment of FIG. 7. FIG.

10 is a sectional view of a portion (XX) in FIG.

[Explanation of symbols]

1 Male joint fitting 1a Metal fitting body 1b head 1c insertion hole A few female fittings 2a, 3a Metal fitting body 2b, 3b Fitting part 2c, sc storage hole 3c extrusion protrusion 5 capsules Sa hexagonal segment Sb square segment Ka, Kb inclined joint surface Ga, Gb side joint surface T end joint surface c Caulking agent g gap

─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroki Someya 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Inside Ishikawajima Kenzai Kogyo Co., Ltd. (72) Akio Hashiguchi 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Ishikawajima Kenzai Kogyo Co., Ltd. (56) Reference JP-A-7-4191 (JP, A) JP-A-8-210097 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 11 / 04 E21D 11/08

Claims (7)

(57) [Claims] 1. A male segment joining fitting for joining segments by fitting a head into a fitting portion of a female joining fitting, wherein a caulking agent insertion hole is fitted to the head. A segment joint fitting, characterized in that it is formed along the direction in which the head fits into the section. 2. A female segment joining fitting for joining segments by fitting a fitting portion to the head of a male joining fitting, wherein the fitting portion has a head of the male joining fitting. A segment fitting, characterized in that an extrusion projection to be inserted into the insertion hole formed in the projection is provided so as to project in the fitting direction of the fitting portion with respect to the head portion. 3. The segment fitting according to claim 1 is provided at a corner of two inclined joining surfaces, and the segment joining fitting according to claim 2 is provided on at least one of side joining surfaces substantially parallel to each other. Hexagonal segment characterized by 4. The segment joint fitting according to claim 1 is provided substantially in the center of the end joint surface, and the segment joint fitting according to claim 2 is provided on at least one of the side joint surfaces that are substantially parallel to each other. A rectangular segment characterized by 5. The head of one male joint of the second segment is fitted into the fitting portion of the one female joint of the first segment, and the third segment is inserted into the head. In the case of joining the three segments according to claim 3 or 4 by fitting the fitting portion of one female-type joining metal fitting of
Caulking in the insertion hole and / or the storage hole connected to the insertion hole by inserting the extrusion protrusion provided in the fitting portion of the female-type fitting into the insertion hole formed in the head of the male-type fitting. A segment joining method, characterized in that the agent is pushed into the gap between the joining fittings and joined. 6. The method for joining segments according to claim 5, wherein the caulking agent is contained in a capsule that is broken by inserting the extrusion protrusion into the insertion hole. 7. The method for joining segments according to claim 5, wherein the caulking agent is an adhesive liquid that hardens to fill the gap.