JP2001164891A - Concrete member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete member preventing a joint section from being broken even when excessive tensile force is applied to the joint section of the concrete members connected together. SOLUTION: A joint with an anchor 57 is buried in the concrete skeleton 1a of a concrete segment 1 in this concrete member. An elastic body 60 is arranged on the front face of a bulge section 58 located on the connecting boundary surface between the anchor 57 and the concrete skeleton 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to one of concrete members, a concrete segment for tunnel lining or a precast concrete member such as a lining plate or a paving slab. The present invention relates to a joint structure of a bolt and nut type to be joined and an auto-chuck type joint with male and female fittings, wherein these joints have an anchor portion for firmly joining with a concrete frame. .

[0002]

2. Description of the Related Art For example, in a concrete segment for tunnel lining which is one of concrete members, a connection between a segment and a segment ring is connected by a bolt and nut type joint or an auto chuck type joint using male and female metal fittings. Is done. In addition, precast concrete members such as road surface lining plates and pavement plates used for road surfaces, airport runways, taxiways, etc., also include joints made of bolts and nuts,
They are connected by an auto-chuck type joint with male and female fittings. In the above-mentioned joint structure, means for fixing the bolts, nuts, and the male and female fittings to the concrete frame include an embedding method, a rebar connection method, and an anchor embedding method.

[0003]

Among the above methods, the anchor part embedding method is one in which an anchor part provided integrally with a main body of a joint fitting is embedded in a concrete frame.
This method is the most excellent means for firmly fixing the joint fitting to the concrete body. However, in the conventional anchor part embedding method, the entire outer surface of the anchor part joined to the tip of the joint fitting is in close contact with the concrete without a gap, is completely integrated with the concrete, and is relatively integrated with the concrete. Since there is no room left to move, the following problems occur.

That is, a large tensile force may act between the rings of the concrete segments or between the road surface lining plate and the paving slab. In this case, the above-mentioned concrete skeleton and the anchor portion are completely integrated. In the structure, there is no allowable part between both members that can absorb the external force, so the external force applied to the concrete skeleton directly acts on the joints such as bolts, nuts, male and female fittings via the anchor part, and destroys them Sometimes.

The present invention has solved the above-mentioned problems, and
For example, an object of the present invention is to provide a concrete member that is not likely to break a joint portion even when a large tensile force acts on various concrete members, such as between concrete segment rings for tunnel lining.

[0006]

In order to solve the above-mentioned problems, a concrete member according to the present invention is configured as follows. The invention according to claim 1 is a concrete member in which a joint with an anchor portion is embedded in a concrete body, wherein an elastic body is disposed at a joint boundary surface between the anchor portion and the concrete body. I do. In the invention according to claim 2, the joint boundary surface between the anchor portion and the concrete skeleton is a front side of a bulge provided in the anchor, and the elastic body is provided on a front side of the bulge. It is characterized by being arranged.

According to the present invention, when a strong tensile force of a predetermined value or more acts between two concrete members to be joined, such as between segment rings, the elasticity existing at the joint boundary surface between the anchor portion and the concrete frame. The body becomes a movable member of the anchor part relative to the concrete body, that is, a cushioning member, and the contact surface between the anchor shaft and the concrete is separated in the range where the elastic body is compressed, and the anchor is accordingly moved to the concrete body. Move relatively. Thus, the external force acting on the concrete skeleton is not directly transmitted to the joint via the anchor, and the joint is not broken. Further, by disposing the elastic body on the front side of the bulging portion of the anchor portion, the above-described operation is further improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, a concrete segment for tunnel lining is shown in the drawings, and will be described in order with reference to the drawings. 1 to 3 show a first embodiment of the present invention. FIG. 1 is an end view of a segment ring. The left side from the center line in FIG. 3 shows an end surface of a segment ring. FIG. 2 is a partially enlarged plan view of FIG. 1 and shows a joint structure between segments and between segment rings.
FIG. 3 is a detailed view of a joint structure. As shown in FIGS. 1 and 2,
Between the segments 1 in the circumferential direction of the tunnel, an L-shaped joint male fitting 4 provided on each abutting end face and a joint part provided in the concave portion 6 and capable of engaging with the engaging tip 4a of the male fitting 4. It is connected by engagement with the female metal fitting 7.

As shown in FIG. 2, the joint structure between the segment rings 2 in the axial direction of the tunnel includes a plurality of engaging pins 44 provided on a side surface 43 on the wellhead side in the axial direction of the tunnel and a plurality of engaging pins 44 on the face side in the axial direction of the tunnel. It is configured by engagement with a plurality of chucks 45 provided on the side surface 43a.

The details of the chuck 45 are shown in FIG. In the same figure, the distal end surface of a circumferential wall 55 of a cap 54 having a bottomed cross section is welded to the inner surface of a reinforcing plate 53, and an engaging recess 56 is formed on the inner surface of the distal end of the circumferential wall 55, so that reinforcement is performed. The peripheral edge of a check spring 47 made of a double-mounted ring-shaped spring steel plate whose center line coincides with the pin insertion hole 46 formed in the plate 53 is formed on the inner surface of the reinforcing plate 53 and the pin insertion hole 46.
Are arranged on the periphery. Ring-shaped check spring 47
Is formed by forming a large number of cuts 49 in the peripheral portion of the ring hole 48 so that a large number of spring pieces 50 whose tips are inclined toward the center of the hole are engraved in the circumferential direction. Also, a gap is formed between the upper and lower spring pieces 50 via the spacer 51 between the peripheral edges of the upper and lower check springs 47, so that the upper and lower spring pieces 50 exert the spring action. I have.
Further, the upper check spring 47 is pressed by an annular plate retainer 52 on the upper step surface of an engagement concave portion 56 formed on the inner surface of the circumferential wall 55 of the cap 54, so that each check spring 47 is attached to the cap 54. Is fixed to the opening.

An anchor portion 59 is welded to the cap 54. By embedding the cap 54 together with the anchor portion 59 in the concrete frame 1a of the segment 1, the cap 54 is connected to the segment 1 via the anchor portion 59. Is fixed to the concrete frame 1a.

On the other hand, the engagement pin 44 in the joint structure
It is provided integrally with the distal end of the anchor portion 57. A bulging portion 58 is provided at the base end of the anchor portion 57, and an elastic body 60 made of rubber or the like is provided on the front side of the bulging portion 58.
Are buried in the concrete frame 1a of the anchor portion 57 segment 1 configured as described above.

Therefore, when the inner wall of the tunnel is constructed, the side face 43a of the newly installed segment 1 on the side of the cutting face in the tunnel axial direction is pushed in the wellhead direction with a jack toward the existing segment ring 2 to join. An engagement pin 44 protruding from the side surface 43 on the wellhead side,
It is inserted into the chuck 45 on the side of the existing segment 1 on the face side. At this time, since the tip of each spring piece 50 of the check spring 47 strongly bites the entire circumference of the engagement pin 44,
The engagement pin 44 does not come out of the chuck 45. If the outer periphery of the engagement pin 44 is roughened or a step is provided, the check spring 47 is engaged with the engagement pin 44 and the slip-out prevention is more perfect.

Further, according to the configuration of the above-described embodiment, since the elastic body 60 is disposed on the front side of the bulging portion 58 of the anchor portion 57, the segment ring which is coupled by the engagement between the chuck 45 and the engaging pin 44. When an excessive tensile force acts in the tunnel axial direction between the two, the elastic body 60 disposed on the front side of the bulging portion 58 of the anchor portion 57 is compressed, and the shaft portion 57a of the anchor portion 57 becomes concrete. Frame 1
a, and the concrete body 1a is separated from the concrete body 1a in the direction of the front end of the anchor portion 57 with respect to the concrete body 1a, that is, in the direction of the engagement portion between the chuck 45 and the engaging pin 44.
Move relative to.

That is, when an excessive tensile force acts in the tunnel axis direction between the segment rings 2, the elastic body 6
0 serves as a relative movable member of the anchor portion 57 with respect to the concrete skeleton 1a, that is, a cushioning member. Therefore, an external force acting on the concrete skeleton 1a is not directly transmitted to the joint portion via the anchor portion 57, and the chuck 45 Is not destroyed. Although not shown, when the elastic body 60 is arranged on the outer periphery of the shaft portion 57a of the anchor portion 57, and the anchor shaft portion 57a is embedded in the concrete frame 1a via the elastic body 60, the same as above is applied. A buffer action can be performed.

Next, FIGS. 4 to 11 show a second embodiment of the present invention (this will be further divided into first to third examples), of which FIGS. 4 to 7 show the first embodiment. For example, FIG. 8 and FIG.
Examples, FIGS. 10 and 11 show a third example.

The outline of the segment of the second embodiment will be described with reference to FIG. This figure shows the inner view of the segment. On one end face 3 of the segment 1 in the tunnel circumferential direction, a hook-shaped joint male fitting 4 with the tip directed in the tunnel axial direction,
Two (or more) are provided at intervals in the axial direction of the tunnel, and the male fitting 4 is fitted into the concave portion 6 provided on the other end surface 5, and the male fitting 4 is tunneled within the concave portion 6. By slightly moving in the axial direction, the fitting male fitting 4 is engaged with the fitting female fitting 7 provided in the concave portion 6, and the segments 1 on the tunnel circumference can be connected.

As described above, between the segment rings 2 formed by joining the segments 1 in the circumferential direction of the tunnel with the joint male fitting 4 and the joint female fitting 7, the end faces of the segments 1 in the tunnel axial direction. It is connected to an inter-ring female metal fitting (hereinafter referred to as a female metal fitting) 8 and a male inter-ring male metal fitting (hereinafter referred to as a male metal fitting) 9 provided at 12, 12a.

FIGS. 5 to 7 show a first example of the second embodiment. FIG. 5 is a cross-sectional view taken along the axis of the male / female joint and cut at a right angle as shown by the cutting lines (a)-(b) in FIGS. 6 (A) and 6 (B). (B) corresponds to A of FIG.
7A and 7B are sectional views of the engagement claw. FIG.
In FIG. 6, the male fitting 9 includes an anchor portion 10 and a head portion 11 provided at the distal end of the anchor portion. The anchor 10 is embedded in the concrete of the segment 1, and the head 11 protrudes from the butt end face 12 a of one of the segments 1. The head 11 has an enlarged portion 13 at the tip, a constricted portion 14 following the enlarged portion 13, and a constricted portion 1.
4, a first guide surface 15 and a second guide surface 16 are provided. The enlarged portion 13 has a male inclined guide surface 17 on the front side.
On the back side.

Further, the anchor portion 10 of the male fitting 9
A bulging portion 58 is provided at the base end of the base member, and an elastic body 60 made of rubber or the like is arranged on the front side of the bulging portion 58. The anchor portion 10 thus configured is It is buried in one concrete skeleton 1a.

The female metal fitting 8 includes an anchor portion 18, an engagement cylinder hole 19 provided at the tip of the anchor portion, and a cylinder wall 20. A plurality of claw holes 21 are provided in the cylindrical wall 20 so as to penetrate the cylindrical wall 20 in and out, and the axis thereof is orthogonal to the axis of the engagement cylindrical hole 19. Two sets of the claw holes 21 are provided facing each other at an interval of 180 °, and two sets are provided as one set. When the entire set is viewed, the claw holes 21 between the sets are arranged with a phase difference of 90 °. I have. An engagement claw 22 and a conical spring 23 for biasing the engagement claw 22 toward the center of the engagement cylinder hole 19 are housed in the claw hole 21.
The outer end of the spring 23 is sealed with a protective ring 24 attached to the outer periphery of the cylindrical wall 20 to prevent escape from the claw hole 21 and prevent excess concrete or the like from entering the cylindrical wall 20 from the outside. Has been prevented.

The engaging claw 22 has a circular shape when viewed from the top and the bottom, and has a small projection 25 protruding from the circumference at the upper end of the circular shape. The engaging claw 22 is located at the front end of the peripheral surface (the lower side in the figure).
Has a flat engaging surface 26 formed by partially cutting off, and has an outer end (upper side in the figure) of the engaging surface 26 with a protruding step portion continuous through a slight curvature portion, A slide surface 28 is formed via the projecting step, and the small protrusion 25 is located at an outer end (upper end in the figure) of the slide surface 28.

The flat engagement surface 26 has a slight (for example, 3 to 10 degrees) gradient θ in a direction in which the inner end of the flat engagement surface 26 moves backward as viewed in the direction of entry of the male metal fittings 9. The two end faces 12 and 12a are configured to secure a margin for fastening adjustment. At the inner end of the engaging claw 22, an arc-shaped recess 29 concentric with the axis of the engaging cylinder hole 19 is formed, and from the rear end of the recess 29 toward the rear of the engaging claw 22,
A claw-side guide slope 30 is formed at an inclination of about 45 degrees with respect to the axis of the engagement cylinder hole 19.

The engaging claw 22 having the above structure is movably inserted into the claw hole 21 formed in the cylindrical wall 20 of the female metal fitting 8 shown in FIGS. The cross-sectional shape of the claw hole 21 is circular in accordance with the cross-sectional shape of the largest diameter portion of the engaging claw 22, and a small arc-shaped concave groove 31 is formed from the middle portion in the inward and outward directions to the outer end. The arcuate small protrusion 25 of the engaging claw 22 is slidably fitted in the concave groove 31, whereby the engaging claw 22 can slide in and out of the claw hole 20 in a non-rotating manner.

As one set of the engaging claws 22 opposed to each other at 180-degree intervals, two sets of the four engaging claws 22 arranged at 90-degree intervals are shown in FIGS. As shown in the figure, the axes of the pairs of engaging claws 22 facing each other are provided at positions slightly shifted in the axial direction of the male and female fittings 8 and 9. (This part is indicated by (d)).
Even if the depth of relative penetration of the male and female metal fittings 8 changes, any pair of engaging claws 22 that are displaced in the axial direction of the male and female metal fittings 8 and 9 in the enlarged portion 13 are appropriate. Can be engaged. In other words, the configuration is such that incomplete engagement due to variation in the engagement depth of the male and female metal fittings 8 and 9 does not occur.

Further, the anchor portion 18 of the female fitting 8
A swelling portion 58 is provided at the base end of the base member, and an elastic body 60 made of rubber or the like is arranged on the front side of the swelling portion 58. It is buried in one concrete skeleton 1a.

The operation of the joint structure in the first example of the first embodiment will be described. In order to connect the opposing segment rings 2 in the tunnel axial direction, for example, in FIG. 5, the end faces 12 in the tunnel axis direction of one segment 1 abut against the end face 12a of the other segment 1 in close proximity to each other.

At this time, the butted end faces 12, 12a
Approaching, the enlarged part 13 of the head 11 of the male fitting 9
Enters the engaging cylinder hole 19 from the opening 40 of the female metal fitting 8. At this time, the male inclined guide surface 17 of the enlarged portion 13
The engaging claw 22 slides in the direction of pushing and expanding against the claw-side guide slope 30 of each engaging claw 22, so that the engaging claw 22 enters while pushing open against the conical spring 23. After moving over the inner end surface of the engaging claw 22, the engaging claw 22 moves in the axial direction of the engaging cylinder hole 19 by the elastic force of the spring 23, so that the flat engaging surface 26 of the engaging claw 22 is enlarged. 13 and engages with the back surface engaging portion 32. As a result, the male fitting 9 is prevented from being disengaged from the engagement cylindrical hole 19 of the female fitting 8, and the butted end faces 1 of the two segments 1 are joined.
The butt-joined state of 2, 12a is maintained.

Further, since the plurality of sets of the engaging claws 22 are provided so as to be displaced from each other in the direction in which the male metal fitting 9 enters, the depth of engagement of each engaging claw 22 with the expanding portion 13 is as follows. As shown in FIG. 5, the engagement claws 22 of each set are different. That is, FIG.
, The butted end faces 12, 12a of the segment 1
The recess 29 of the engaging claw 22 (the upper engaging claw 22 in FIG. 5) at the optimal position in the axial direction is formed in the back engaging portion 32 of the enlarged portion 13 when the Of the male fitting 9, while the recess 29 of the lower engaging claw 22 shown in FIG. The engagement surface 26 and the enlarged portion 13 are kept separated from the outer periphery of the narrow portion 14.
The rear engagement portion 32 is in an improper engagement position when viewed in the male fitting insertion direction, and is engaged with each other in a shallow manner.

Further, when the enlarged portion 13 of the male fitting 9 goes deeper and engages as shown in the figure due to a dimensional error or the like,
The concave portion 29 of the lower engaging claw 22 is the constricted portion 1 of the male fitting 9.
4 and abuts on the expanded portion 13 more deeply to engage properly. At this time, although the upper engagement claws 22 similarly abut each other, the flat engagement surface 26 of the engagement claw 22 and the rear engagement portion 32 of the enlarged portion 13 are fitted in a slightly separated state. Will be.

As described above, by disposing the axial centers of the plural sets of engaging claws 22 in the axial direction of the male and female metal fittings 8 and 9, the engagement depth of the male and female metal fittings 8 and 9 can be reduced. The joint allowable range is expanded, and regardless of the placement error and the assembly error of the male and female metal fittings due to the molding of the segment, both members to be connected to each other or the butted end faces 12 and
A secure connection at 12a can always be ensured.

As shown in FIG. 5, when the male and female metal fittings 8 and 9 are fitted and engaged with each other, the enlarged portion 13 and the engagement cylindrical hole 19 are formed.
A slight clearance 34 is formed between the hole bottom 33 and the hole bottom 33. Also, abutting end surfaces 1 of both segments 1
2, 12a are designed so that the male and female metal fittings 8, 9 can be engaged even if there is a clearance of about 0.5 mm to 1.0 mm in consideration of the amount of compressive deformation of the waterproof packing provided on the end face. It is. In this case, even if the entry position of the male metal fitting 9 into the female metal fitting 8 is shifted, at least one set of the engaging claws 22 can be properly engaged with the expanding portion 13 within the allowable range of the above-described configuration.

Further, a tensile force and a shearing force act on the joints of the male and female fittings 8 and 9. In particular, when a tensile force acts, a rotational force acts on the engagement claw 22, but as shown in the figure,
The slide contact surface 28a between the engaging claw 22 and the claw hole 21 is sufficiently wide, and the inner end side walls 35, 36 of the claw hole 21 are reactive against the rotational force acting on the engaging claw 22. It becomes a wall and reliably receives the rotational force of the engaging claw 22,
The joint structure sufficiently withstands a large tensile force acting on the joints of the male and female fittings 8, 9.

When a shearing force is applied, the female fitting 8
Is larger than the difference between the inner diameter of the opening 40 a of the female fitting 8 and the second guide surface 16 of the male fitting 9. With this setting, the second guide surface 16 of the male fitting 9 comes into contact with the opening 40a of the female fitting 8 and can be resisted by the contact bearing resistance force. It is possible to endure.

FIGS. 8 and 9 show a second example of the second embodiment. In the second example, the depth of the claw hole 21 is set to be longer than that of the second example, and the length of the engaging claw 22 inserted therein is set to be longer than that of the first example. Also, the pressing structure of the conical spring 23 for urging the engaging claw 22 inserted into the claw hole 21 is different from that of the first example.

That is, in the first example, the cylindrical wall 20 of the female fitting 8 is
Has a circular shape, and a protection ring 24 for holding the conical spring 23 is annularly mounted. In contrast,
In the second example, on the cylindrical wall 20 of the female fitting 8,
An intermediate portion of the claw hole 21 provided with a phase difference of 90 degrees between the two sets is formed in a concave shape 37 as shown in the figure, and a tip engaging portion is formed on a wall around each claw hole 21 formed thereby. 3
The conical spring 23 in the claw hole 21 is held down by crimping a cap 39 with packing to the distal end engaging portion 38. Other configurations are the same as those of the first example.

FIGS. 10 and 11 show a third embodiment of the present invention.
Here is an example. The third example differs from the first and second examples in the following points. That is, in the first example and the second example, the plurality of sets of the engagement claws 22 having different arrangement angles are provided at positions slightly shifted in the axial direction of the male and female metal fittings 8 and 9. 9 and is engaged with the rear engaging portion 32 of the one enlarged portion 13 provided in one position. On the other hand, in the third example, the first and second pairs of engaging claws 2 forming a pair in the circumferential direction are provided.
2a and 22b are arranged so as to be largely displaced with respect to the axial direction of the engagement cylinder hole 19, and are mounted in the engagement holes 21a and 21b. On the other hand, the male fitting 9 is provided with first and second enlarged portions 13a and 13b which are displaced in the axial direction, and a first engaging claw 22a is provided on the first enlarged portion 13a. The second engaging claw 2 is engaged with the second expanding portion 13b.
2b are provided to be engaged.

Further, as shown in FIG. 10, when the male fitting 9 and the female fitting 8 enter, the first engaging claw 22a and the first enlarged part 13a enter an appropriate engagement state. In addition, the approach depth at which the second engagement claw 22b and the second enlarged portion 13b enter the proper engagement state is changed. Therefore, as in the first example, even if the penetration depth of the male fitting 9 into the female fitting 8 changes, the first enlarged part 13a and the first engaging claw 22a or the second enlarged part 13b and the second Since one of the engaging claws 22b is engaged in a proper engagement state, the male and female metal fittings 8, 9 are always provided.
Can be surely engaged. Other configurations are the same as those of the first and second examples, and therefore, the same elements are denoted by the same reference numerals and description thereof will be omitted.

In the first to third examples of the second embodiment, the female fitting 8 and the male fitting 9 are integrally provided with anchor portions 10 and 18 each having a bulging portion 58 at the rear end. An elastic body 60 made of rubber or the like is arranged on the front side of the bulging portion 58 of each of the anchor portions 10 and 18 as in the first embodiment. , 18 are embedded in the concrete skeleton 1a.

Therefore, according to the configuration of each example of the second embodiment, when an excessive tensile force in the tunnel axial direction acts between the segment rings 2 which are connected by fitting the female metal fittings 8 and the male metal fittings 9, Swelling portion 5 of anchor portions 10 and 18
8, the elastic body 60 arranged on the front side is compressed, and the shafts of the anchors 10, 18 are peeled off from the concrete skeleton 1a, and the front ends of the anchors 10, 18 with respect to the concrete skeleton 1a, That is, the female fitting 8 and the male fitting 9
Relative to the concrete skeleton 1a in the direction of the fitting portion. That is, when an excessive tensile force acts in the tunnel axis direction between the segment rings 2, the elastic body 60 serves as a relative movable allowance member of the anchor portions 10, 18 with respect to the concrete skeleton 1a, that is, a cushioning member. Therefore, the external force acting on the concrete skeleton 1a is not directly transmitted to the joint portion via the anchor portions 10 and 18, and the joint portion is not broken. Although not shown, when the elastic body 60 is disposed on the outer periphery of the shafts of the anchor portions 10 and 18 and the anchor shaft is integrally embedded in the concrete frame 1a via the elastic body 60, the same applies as described above. Buffering action can be performed.

FIGS. 12 to 16 show a third embodiment. The third embodiment will be described by further dividing it into first to third examples. As a configuration common to the third embodiment, as shown in each drawing, the female metal fitting 62 is provided on one concrete member 64, and the male metal fitting 61 is provided on the other concrete member 63, and each is configured as shown in the drawing. I have.

FIGS. 12 and 13 show the first embodiment according to the third embodiment.
An example is shown, and in the first example, the female metal fitting 62 is constituted by the following members. That is, one concrete member 64
A female contact plate 67 made of a steel plate having an opening 66 and a tube tip 78 fixed to the back side of the female contact plate 67, and a male metal fitting is provided on the inner surface of the tube. The receiving recess 70 is formed, and a cylindrical body 72 having a locking projection 71 of a predetermined projection size on the inner surface, and a ring spring receiving portion 73 formed by the locking projection 71 and the female contact plate 67 are enlarged in diameter. A ring spring (hereinafter referred to as the ring spring according to the first embodiment) having a cut-out portion 74 provided at one location in the circumferential direction and having an insertion guide curved surface 75 at the inner edge of the male fitting on the insertion side. (Referred to as a first ring spring) 76
Thus, the female member 62 is formed.

The rear end of the cylinder 72 is closed with a cap 77 made of rubber or plastic. Further, two convex portions 68 are provided on the front surface of the female contact plate 67 so as to be symmetrically arranged. An end portion of the anchor portion reinforcement 69 is welded to the outer periphery of the cylindrical body 72, and the anchor portion reinforcement 6
The female metal fitting 62 is buried in the concrete member 64 via 9 and is firmly integrated. The locking projection 71 is formed by punching a steel plate in an annular shape, is disposed in parallel with the female contact plate 67, and has an outer peripheral edge fixed to the inner surface of the cylindrical body 72 by welding.

The insertion guide curved surface 75 of the male fitting provided on the first ring spring 76 is formed by rounding, and the opposite surface is formed in a rectangular shape. The insertion guide curved surface 75 of the R processing is for facilitating the engagement of the male fitting, and the rectangular shape on the opposite surface is such that the male fitting is not pulled out after the engagement of the male fitting. This is for securely engaging the first ring spring 76 with the head of the fitting.

In FIG. 12, a male fitting 61 includes a shaft 82 projecting from a male steel contact plate 81 provided at a connection end 80 of the other concrete member 63, and a shaft 82.
Has a large diameter head 83 at the tip of the head 83.
A tapered portion 84 is provided on the front side of the tapered portion. Further, the shaft portion 82 is provided integrally with a front end portion of the anchor portion 57, and a swelling portion 58 is provided at a rear end of the anchor portion 57, and a front surface of the swelling portion 58 is formed of rubber or the like. Elastic body 60 is disposed.

On the front surface of the male contact plate 81, two concave portions 88 into which the convex portions 68 fit are provided symmetrically with respect to the convex portions 68 of the female contact plate 67. After the male and female metal fittings 61 and 62 are engaged with each other, the shear resistance is imparted to the male and female metal fittings 61 and 62 by fitting the convex portions 68 and concave portions 88 of the female and male contact plates 67 and 81. It is. In addition, the engagement between the concave portion 88 and the convex portion 68 allows the male fitting 61 and the female fitting 62 to be aligned at the time of connection, thereby improving the assembling workability.

The procedure for engaging the male fitting 61 and the female fitting 62 according to the first example of the third embodiment is as follows. When the male fitting 61 starts to engage with the female fitting 62, first, the head 8
The third tapered portion 84 of the third metal member contacts the first ring spring 76 in the female metal fitting 62, and the first ring spring 76 expands its diameter through the cut-off part 74, so that the male metal fitting 61 is inserted, and finally, Engages. After the engagement, the engagement projection 86 of the head 83 of the male metal fitting 61 and the angular surface 87 of the first ring spring 76
And the joint surfaces of the concrete members 63 and 64 are joined.

Also, at this time, the projection 68 and the recess 88 of the female and male contact plates 67 and 81 are engaged with each other with respect to the shearing of the joint surface, so that this portion has shear resistance. The engagement between the convex portion 68 and the concave portion 88 also has a centering function.

FIG. 14 shows a second example of the third embodiment. In the second example, the shaft 82a of the male fitting 61
Is different from that of the first example. That is, the shaft portion 82a of the male metal fitting 61 is provided with a slightly larger diameter than the shaft portion 82 of the first example, and the head 8
A constricted portion 90 is formed in which the inner peripheral edge 89 of the first ring spring 76 engaged with the third 3 is fitted. Other configurations are the same as those of the first example.

In the second example of the third embodiment, the male fitting 6
1 is engaged with the female metal fitting 62, the inner peripheral edge 89 of the first ring spring 76 fits into the constricted portion 90 at the tip of the shaft portion 82a,
Further, since the shaft portion 82a is provided with a larger diameter than the shaft portion 82 of the first embodiment, a small gap is formed between the shaft portion 82a having the larger diameter and the inner peripheral edge 91 of the opening 66 of the female contact plate 67. Are close to each other.

In the second example, after the male fitting 61 and the female fitting 62 are engaged, the shear acting on the joint surface has a larger diameter than the shaft 82 of the first example, that is, The shaft portion 82a having high strength is engaged with the inner peripheral edge 91 of the opening of the female contact plate 67 that is close to the shaft portion 82a with a small gap, thereby exerting shear resistance. Therefore, in the joint structure of the second example, the male and female abutment plates 67, 81 in the first example.
Can be omitted.

FIGS. 15 and 16 show a third example of the third embodiment. In the third example, the structure of the ring spring (hereinafter referred to as a second ring spring) 92 of the female fitting 62 is different from those of the first example and the second example. In other words, the second ring spring 92 has an annular arrangement of a plurality of split piece members 93 arranged in an annular shape, and a cut-out portion 94 which is a one-part cut-off portion which is an expansion / contraction elastic holding member for holding the split piece member 93 in an annular shape. And a spring piece 95. Other configurations are
This is the same as the first and second examples.

In the third example of the third embodiment, when inserting the male metal member 61 into the female metal member 62, the head portion 83 pushes and expands the annular spring piece 95 while the plurality of split piece members 93 arranged in an annular shape are moved. The diameter is increased and inserted and engaged. After the engagement, the engagement projection 96 of the head 83 of the male fitting 61 and the female fitting 6
The angular faces 97 of the plurality of split piece members 93 arranged in an annular shape and reduced in diameter by the resilience of the annular spring pieces 95 are engaged with each other, and the joint surfaces of the concrete members 63 and 64 are joined.

Further, in the first to third examples of the third embodiment, the shaft portions 82 and 82a of the male
7, an elastic body 60 made of rubber or the like is arranged on the front side of the bulging portion 58 of each anchor portion 57, and the anchor portion 57 thus configured is attached to the concrete frame 1a. It is buried.

Therefore, according to each configuration example of the third embodiment, when an excessive tensile force acts between the concrete members 63 and 64 which are connected by fitting the female metal fitting 62 and the male metal fitting 61, the anchor portion 57 is not moved. The elastic body 60 disposed on the front side of the bulging portion 58 is compressed, and the shaft portions 82, 82a of the anchor portion 57 are separated from the concrete skeleton 1a,
It moves relative to the concrete skeleton 1a in the direction of the front end of the anchor portion 57 with respect to the concrete skeleton 1a, that is, in the direction of the fitting portion between the female fitting 62 and the male fitting 61.

That is, when an excessive tensile force acts between the concrete members 63 and 64, the elastic body 60 serves as a relative movable member of the anchor portion 57 with respect to the concrete frame 1a, that is, a buffer member. Therefore, the external force acting on the concrete skeleton 1a is not directly transmitted to the joint via the anchor 57, and the joint is not broken.

Although not shown, the elastic body 60 is connected to the outer periphery of the anchor 57 and the shaft 8 integral with the anchor.
2, 82a, the same cushioning action as described above can be performed when the anchor portion and the shaft portion are integrally embedded in the concrete frame 1a via the elastic body 60.

FIG. 17 shows the fourth embodiment. In the fourth embodiment, two concrete members 63, such as segments,
A bolt 100 and a nut 101 are used in a joint structure 64, and an example in which the present invention is applied to a joint structure including the bolt 100 and the nut 101 is shown. That is, in the fourth embodiment, one concrete member 63
The nut 101 is embedded in the concrete skeleton 1a such that the nut end face is located at the butted end face 102 of the base member 101. An anchor portion 57 extending integrally from the rear end of the nut 101 is provided. A bulging portion 58 is provided at the end, and an elastic body 60 made of rubber or the like is arranged on the front surface of the bulging portion 58.

In the fourth embodiment, the bolt insertion hole 10 is formed in the butt end face 103 of the other concrete member 64.
4 is provided, and the bolt 100 is positioned in the concave portion 106 on the back side of the joint plate 105.
00 is screwed into the nut 101 through the bolt insertion hole 104 to connect the concrete members 63 and 64 together.

Also in the fourth embodiment, when an excessive tensile force acts between the concrete members 63 and 64, the elastic member 60 disposed on the front side of the bulging portion 58 of the anchor portion 57.
Is compressed, and the shaft portion 57a of the anchor portion 57 is peeled off from the concrete frame 1a, and the front end direction of the anchor portion 57 with respect to the concrete frame 1a, that is, the screw portion of the bolt 100 and the nut 101 is screwed. In the direction relative to the concrete skeleton 1a.

That is, when an excessive tensile force acts between the concrete members 63 and 64, the elastic body 60 becomes a relative movable member of the anchor portion 57 with respect to the concrete frame 1a, that is, a buffer member. Therefore, the external force acting on the concrete skeleton 1a is not directly transmitted to the joint composed of the bolt 100 and the nut 101 via the anchor 57, and the joint is not broken.

Although not shown, when the elastic body 60 is arranged on the outer periphery of the shaft portion 57a of the anchor portion 57, and the anchor shaft portion 57a is buried integrally with the concrete frame 1a via the elastic body 60, The same buffering action as described above can be performed.

[0063]

According to the concrete member of the present invention, when a certain or more strong tensile force acts between various concrete members to be joined, such as between segment rings, an anchor portion provided integrally with the joint portion. The elastic body arranged at the joint interface between the concrete frame and the concrete frame acts as a relative movable member of the anchor section with respect to the concrete frame, that is, a cushioning member. Therefore, external force acting on the concrete frame is directly applied to the joint section via the anchor section. Therefore, there is an effect that the joint portion is not broken, and the above effect is further improved by disposing the elastic body on the front side of the bulging portion of the anchor portion.

[Brief description of the drawings]

FIG. 1 is an end view of a segment ring according to Embodiment 1 of the present invention, in which a left side from a center line shows a face side, and a right side shows a wellhead side.

FIG. 2 is a partially enlarged plan view of a segment of FIG. 1;

3 is a detailed sectional view of the joint structure between segment rings in FIG. 1;

FIG. 4 is an inner view of a segment according to Embodiment 2 of the present invention.

FIG. 5 is a longitudinal sectional side view of a joint structure using male and female fittings according to a first example of Embodiment 2, and FIGS. 6 (A) and 6 (B) show (A)-
It is the figure which cut | disconnected at right angles through the axial center of the male-female joint part as shown by the cutting line of (a).

6A is a sectional view taken along line AA of FIG. 5, and FIG. 6B is a sectional view taken along line BB of FIG.

FIG. 7 (A), (B), (C), (D), (E)
It is a top view, a bottom view, a front view, a side view, and a rear view of an engagement claw.

FIG. 8 is a longitudinal sectional side view of a joint structure using male and female fittings according to a second example of Embodiment 2, and FIGS. 8A and 8B show (b)-.
It is the figure which cut | disconnected at right angles through the axial center of the male-female joint part as shown by the cutting line of (b).

9A is a cross-sectional view taken along the line CC of FIG. 8, and FIG.
It is DD sectional drawing of.

FIG. 10 is a longitudinal sectional side view of a male and female fitting according to a third example of the second embodiment, and as shown by cutting lines (c)-(c) in FIGS. 11 (A) and 11 (B), It is the figure which cut | disconnected at right angles through the axis.

11A is a sectional view taken along the line EE of FIG. 10, and FIG. 11B is a sectional view taken along the line FF of FIG.

FIG. 12B is a longitudinal sectional side view of a male fitting according to a first example of the third embodiment, and FIG. 12A is a cross-sectional view of FIG.

13B is a longitudinal side view of the male and female fittings according to the first example of the third embodiment, and FIG. 13A is a cross-sectional view of FIG.

FIG. 14 is a longitudinal sectional side view of a male and female fitting according to a second example of the third embodiment.

FIG. 15 is a longitudinal sectional side view of a male and female fitting according to a third example of the third embodiment.

16 is a sectional view taken along (f)-(f) of FIG. 15;

17A and 17B are cross-sectional views of a concrete member before and after coupling of a joint structure with bolts and nuts in a concrete member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 segment 2 segment ring 3 one end face 4 joint part male fitting 5 other end face 6 concave part 7 joint part female fitting 8 ring female fitting (referred to as female fitting) 9 ring male fitting (referred to as male fitting) 10 anchor part 11 head 12 Butt end surface 13 Enlarged portion 14 Constricted portion 15 First guide surface 16 Second guide surface 17 Male-side inclined guide surface 18 Anchor portion 19 Engaging cylinder hole 20 Cylindrical wall 21 Claw hole 22 Engaging claw 23 Conical spring 24 Protection ring 25 Small projection 26 Engagement surface 28 Slide surface 29 Depression 30 Claw-side guide slope 31 Depression groove 32 Back engagement portion 33 Hole bottom 34 Clearance 35 Inner end both side walls 36 Inner end both side walls 37 Concave portion 38 Tip locking portion 39 Packing cap 40 Opening 41a Opening 43 Side surface 44 Engagement pin 45 Chuck 46 Pin insertion hole 47 Check F 48 Ring hole 49 Cut 50 Spring piece 51 Spacer 52 Retainer 53 Reinforcement plate 54 Cap 55 Circumferential hole 56 Engagement concave portion 57 Anchor 57a Shaft 58 Swelling portion 59 Anchor bar 60 Elastic body 61 Male fitting 62 Female fitting 63 Concrete Member 64 Concrete member 65 Connecting end 66 Opening 67 Female abutment plate 68 Convex portion 69 Anchor bar 70 Depressed portion 71 Locking projection 72 Cylindrical body 73 Ring spring receiving portion 74 Separation portion 75 Insert guide curved surface 76 First ring spring 77 Cap 78 Tube tip 80 Connecting end 81 Male contact plate 82 Shaft 83 Head 84 Taper 86 Engagement projection 87 Corner 88 Depression 89 Inner rim 90 Neck 91 Inner rim 92 Second ring spring 93 Piece member 94 Separation part 95 Annular spring piece 96 Engagement convex part 97 Square face 100 DOO 101 nut 102 abutting end faces 103 abutting end faces 104 bolt insertion hole 105 joint plate 106 recess

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshikazu Kido, Inventor 2-1 Tsukudocho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Tashiro ▲ Noboru ▼ 2-1 Tsukudocho, Shinjuku-ku, Tokyo Kumagai Gumi Tokyo Head Office (72) Inventor Hideki Tanaka 4-2-2 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. (72) Inventor Yutaka Hiroshi 2-3-2 Shiba, Minato-ku, Tokyo Geostar F term in the company (reference) 2D051 AF03 DA01 DA12 2D055 BA01 GC04 GC06 2D059 AA14 CC03 GG55

Claims (2)

[Claims] 1. A concrete member in which a joint with an anchor is embedded in a concrete body, wherein an elastic body is disposed at a joint interface between the anchor and the concrete body. . 2. A joint boundary surface between the anchor portion and the concrete skeleton is a front side of a bulge provided on the anchor, and the elastic body is arranged on a front side of the bulge. The concrete member according to claim 1, wherein: