JP2672381B2 - Concrete segment joining equipment - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a joining device provided at a connecting end face portion of a concrete segment for joining concrete segments to each other.

[Prior art and problems to be solved by the present invention]

Conventionally, a joining device for joining with a plurality of joining bolts has a complicated structure, and tends to be difficult and expensive to manufacture. Further, if the structure is complicated, it is not possible to wrap the cast concrete into this joining device.

Therefore, the adhesion of concrete to the joining device is poor,
Concrete makes it impossible to increase the rigidity.

This invention was created in view of the above-mentioned circumstances,
The purpose is to increase the rigidity of the joint end surface portion, to ensure that the concrete segments can be joined to each other, and to provide a joining device that has a simple structure and can be easily manufactured. To do.

[Means for solving the problem]

According to the joining apparatus of the present invention, a joining work blockout is always provided at the joining end face portion of one concrete segment to be joined, and a large washer with a dropout preventing projection is buried in the joining end face side. Then, a metal fitting for joining is buried in the other end portion of the concrete segment to be joined, with one end exposed at the end surface of the concrete segment. A joining device is composed of the large washer and the joining metal fitting which are buried.

The joining metal fitting includes (a) a pipe-shaped bolt screwing portion into which the tip of the joining bolt can be screwed, and a reinforcing bar mounting portion integrally provided on the coaxial line of the bolt screwing portion ( (See FIG. 2) (b) Two types of pipe-like bolt penetrating portion through which a joining bolt can penetrate and a reinforcing bar mounting portion provided on the outer peripheral surface of the bolt penetrating portion (see FIG. 5) However, in any case, it has a simple structure in which a plurality of pipes are connected by ribs to form a single metal fitting, and can be easily and inexpensively manufactured together with a large washer.

Since the joining metal fitting is a shape in which multiple pipes are connected by ribs, it is easy to wrap around the poured concrete,
There is almost no decrease in the rigidity of the joint end face portion due to the burying of the joint fitting.

The large washer is a single steel plate, and has the same number of bolt through holes as the number of pipes forming one joining fitting, and is provided with a drop-out preventing projection.

There are the following three types of modes of the structure of the bonding apparatus of the present invention, which is configured by embedding the metal fitting and the large washer.

(1) One concrete segment is provided with a blockout for joining work and a large washer is buried,
The other concrete segment is not provided with a blockout for joining work, only the above-mentioned (a) type joining metal fitting is embedded, and the tip of the joining bolt inserted from one concrete segment side is attached to the bolt screw of the joining metal fitting. Screw to the joint.

(2) A blockout for joining work is provided on both concrete segments, and large washers are buried in each. On the other hand, the above-mentioned (b) type joining metal fitting is embedded in one of the other concrete segments. Insert the joining bolt between both joining blockouts and tighten both ends of the joining bolt to the respective large washers with nuts. At this time, the joining bolts are bolt-connected by penetrating one large washer-a through hole of the segment concrete-a bolt penetrating portion of the joining metal fitting-the other large washer.

(3) Blockouts for joining work are provided on both concrete segments, and large washers are buried in each. The joining metal fittings of the above-mentioned type (b) are embedded in both concrete segments. Insert the joining bolt between both joining blockouts and tighten both ends of the joining bolt to the respective large washers with nuts. At this time, the joining bolts are bolt-connected by penetrating one large washer-a bolt penetrating portion of one joining metal fitting-a bolt penetrating portion of the other joining metal fitting-the other large washer.

Which of the above-mentioned joining structures is to be used is appropriately determined depending on the shape and size of the concrete segment.

〔Example〕

The concrete segment joining apparatus of the present invention will be described below with reference to the embodiments shown in the drawings.

1 to 3 show an example of the joining device according to claim 1.

This joining device 1 includes a large washer 5 provided on a joining work block out 4 at a joining end face portion 3 of one concrete segment 2 to be joined and a joining end face portion 3'of another concrete segment 2'to be joined.
, And a joining metal fitting 7 into which a plurality of joining bolts 6 penetrating the joining end face portion 3 of one concrete segment 2 are screwed.

Further, the joining metal fitting 7 is formed in a pipe shape so that the joining bolt 6 can be screwed, and a plurality of bolt screwing portions 9 connected by ribs 8 and the bolt screwing portion 9 are coaxial with each other. It is integrally provided on the line and is composed of a reinforcing bar mounting portion 11 to which a reinforcing bar 10 serving as an anchor is mounted.

The joining metal fittings 7 are provided with three bolt screwing portions 9 connected to each other by ribs 8 at triangular vertexes, and the reinforcing bar mounting portion 11 is more than the bolt screwing portion 9. It has a large diameter.

The large washer 5 is formed in a trapezoidal shape in which three bolt through holes 5a for the joining bolts 6 are provided, and is provided with a drop-out preventing projection 12 that prevents the drop-out from the blockout 4 for joining work. Has been. Dropout prevention protrusion here
12 is provided at the center of the side surface of the large washer 5.

In addition, the projection 12 for preventing the large washer 5 from coming off
In addition to the side surface, the large washer 5
It may be provided on the contact surface with the blockout 4 for joining work.

The joining device 1 having such a configuration includes the large washer 5 and the joining metal fitting 7, the concrete segment 2,
It is provided by mounting it at a predetermined position of 2 '.

That is, the large washer 5 is embedded in the concrete segment 2 with its surface exposed to the side surface of the joint end surface 2a of the block out 4 of the concrete segment 2.

Further, in the joining metal fitting 7, the deformed bar 10 which is an internal bar arrangement of the concrete segment 2'is mounted as an anchor (here, screwed) to the reinforcing bar mounting part 11 and the reinforcing bar mounting part 11 of the bolt screwing part 9 is connected. The end face on the opposite side is exposed to the joint end face 2'a of the concrete segment 2'so that it is flush with the joint end face portion 3 of the concrete segment 2 '.
Buried in.

Then, the joining bolt 6 penetrating through the joining end face portion 3 of the large washer 5 and the concrete segment 2 and screwed into the bolt screwing portion 9 of the joining metal fitting 7 is used by using the blockout 4 for joining work to nut. By tightening with 13, the joining of the two concrete segments 2, 2'by the joining device 1 of the present invention is performed.

4 to 5 show an example of the joining device according to claim 2.

The joining device 1 here comprises two large washers 5,5 provided on the joining work block outs 4,4 at the joining end face portions 3 of both concrete segments 2,2 'to be joined.
And the joining end face portion 3 of the other concrete segment 2 '.
And a joining metal fitting 14 through which a plurality of joining bolts 6 penetrating the concrete segment joining end face portion 3 and the large washers 5, 5 pass.

The joining metal fitting 14 is provided on the bolt penetrating portion 15 formed in a pipe shape so that the joining bolt 6 can penetrate therethrough and connected by a plurality of ribs 8, and the outer peripheral surface of the bolt penetrating portion. And a rebar mounting portion 16 to which the rebar is mounted.

The joining metal fittings 14 are provided with three bolt penetrating portions 15 at each apex position of a triangle by connecting the rib penetrating portions 15 with each other, and the reinforcing bar mounting portion 16 has one bolt penetrating portion 15.
On both sides, and on the remaining two bolt penetrating portions 15, one on each side, a total of four.

The large washers 5, 5 are provided with a drop-out preventing projection 12 at the center position of the side surface as in FIG.
It is formed in a trapezoidal shape provided with three 5a.

The joining device 1 having such a configuration includes the large washers 5, 5 and the joining metal fitting 14 in the concrete segment.
It is provided by mounting it at a predetermined position of 2, 2 '.

That is, the two large washers 5,5 are the blockouts 4,4 for joining work of the concrete segments 2,2 ', respectively.
Is embedded in the concrete segment 2 with its surface exposed to the joint end faces 2a, 2'a.

The metal fitting 14 is mounted (in this case, screwed) with the deformed bar 10 which is the internal bar arrangement of the concrete segment 2'on the reinforcing bar mounting part 16 as an anchor, and the end face of the bolt penetration part 15 is joined to the concrete segment 2 '. It is embedded in the joint end face portion 3 of the concrete segment 2'so that it is exposed on the end face 2'a and becomes the same face.

Then, attach the joining bolt 6 to the large washer 5 on one side.
-Through hole for segment concrete-Bolt penetration part 15 of fitting 14 for joint-Through the large washer 5 on the other side, and use the block out 4 for joining both nuts 13
By tightening with, both concrete segments 2,
2'joining is performed.

In the illustrated example, the joining metal fitting 14 is embedded only in the joining end surface portion of the concrete segment 2 ', but by embedding the joining metal fitting 14 also in the joining end surface portion of the concrete segment 2, the rigidity of the joining end surface portion is further enhanced. The thickness from the joint end surface of the concrete segment 2 to the block out for joining work can be made small like the concrete segment 2 '.

〔The invention's effect〕

According to the joining apparatus of the present invention, a joining work blockout is always provided at one joining end face portion of the concrete segment to be joined, and the large washer is buried in the joining end face side. Then, a metal fitting for joining is buried in the other end portion of the concrete segment to be joined, with one end exposed at the end surface of the concrete segment.
A joining device is composed of the large washer and the joining metal fitting which are buried.

The joining metal fitting includes (a) a pipe-shaped bolt screwing portion into which the tip of the joining bolt can be screwed, and a reinforcing bar mounting portion integrally provided on the coaxial line of the bolt screwing portion ( b) There are two types: a pipe-shaped bolt penetrating part through which the joining bolt can penetrate, and a reinforcing bar mounting part provided on the outer peripheral surface of the bolt penetrating part. In each case, a plurality of pipes are used. It has a simple structure in which it is connected with a rib to form one metal fitting, and together with the large washer,
Easy and cheap to manufacture.

Since the joining metal fitting is a shape in which multiple pipes are connected by ribs, it is easy to wrap around the poured concrete,
There is almost no decrease in the rigidity of the joining end face part due to the burying of the joining metal fitting, and since the rigidity can be increased by increasing the rigidity with the joining metal fitting, the thickness from the joining end surface of the concrete segment to the block out for joining work can be increased. It can be made small, and at the same time, the connecting bolt passing therethrough can be made short.

Since the large washer is embedded with a drop-out preventing projection and does not fall off without an anchor, it is possible to avoid the congestion of the reinforcing bar around the blockout for joining work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which the joining apparatus of the present invention is embedded in the joining end face portions of both concrete segments to be joined, and FIG. 2 is a perspective view showing a joining fitting in the joining apparatus of the present invention, FIG. 1 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 4 is a cross-sectional view showing a state in which the joining device of another embodiment of the present invention is embedded in the joining end face portions of both concrete segments to be joined, and FIG. 5 is the present invention. FIG. 6 is a perspective view showing a joining metal fitting at a joining position of another aspect of FIG. 6, and FIG. 6 is a sectional view showing another aspect of the large washer in the joining device of the present invention. 1 …… Joining device, 2,2 ′ …… Concrete segment, 2
a, 2a '... Joining end face, 3 ... Joining end face part, 4 ... Blockout, 5 ... Large washer, 5a ... Bolt through hole, 6 ... Joining bolt, 7 ... Joining metal fitting, 8 ...... Rib, 9 ...... Bolt screwing part, 10 ...... Reinforcing bar, 11 ...... Reinforcing bar mounting part, 12 ...... Fallout prevention projection, 3 ...... Nut, 14 ...... Joining metal fitting, 15 ...... Bolt penetration Part, 16 ... Reinforcing bar mounting part.

Claims (2)

(57) [Claims] 1. A drop-out preventing projection having a plurality of bolt through holes, the surface of which is exposed and buried on a joint end face side of a joint work block out of one concrete segment joint end face portion to be joined (A). A large washer,
(B) A metal fitting for joining one end of the other concrete segment to be joined with one end exposed and being embedded, and a plurality of joining bolts threaded through the large washer and one end of the concrete segment joining end (C) The joining fitting is formed in a pipe shape so that the joining bolt can be screwed, and a plurality of bolt screwing portions connected by ribs, and the bolt screwing portion. Is integrally provided on the coaxial line, and is composed of a reinforcing bar mounting portion to which a reinforcing bar serving as an anchor is mounted. 2. A drop-out preventing projection having a plurality of bolt through holes, the surface being exposed and buried on the joint end face side of a joint work block out in the joint end face portions of both concrete segments to be joined. Both large washers of (1) and (B) have one end exposed and embedded in the joint end face of either or both concrete segments, and a plurality of joint bolts that penetrate the concrete segment joint end face part and the large washer penetrate (C) The joining fitting is formed in a pipe shape so that the joining bolt can penetrate therethrough, and a plurality of bolt penetration portions connected by ribs and the bolt penetration portion. Is provided on the outer peripheral surface of the section, and is composed of a reinforcing bar mounting section to which a reinforcing bar serving as an anchor is mounted. Placement of the bonding apparatus.