JPS61261502A - Connection structure of concrete paving panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a connecting structure for connecting paving slabs to each other, and particularly to a connecting structure for concrete paving slabs for connecting precast concrete pavement slabs to each other via connecting reinforcing bars.

[Technical background and the same topic] When forming a paved surface such as a road by laying precast concrete pavement slabs manufactured in advance at a factory or on site, it is necessary to connect the pavement slabs to each other, and there are various methods for doing so. Proposed.

One way to do this is to drill a horizontal hole in one of the paving slabs, one end of which opens into the end surface of the paving slab, insert the bonding reinforcing bars into this horizontal hole, and connect the end surface of the horizontal hole and the top surface of the paving slab with a through hole. Drill a horizontal hole that communicates with the end face of the other FJI plate, and then drill the holes so that the openings of both horizontal holes coincide.
It is known to push the bonding reinforcing bars into the horizontal hole on the other side and then fill the horizontal hole with filler material. In such a method, it is necessary to make the diameter of the joint reinforcing bar smaller than the diameter of the horizontal hole, so a gap is created at the opening after the joining reinforcing bar is pushed in. When filling with the filler, there is a concern that the filler may leak from the 1lIliliJ.

This method is similar to the paving slab joining method disclosed in Japanese Patent Application Laid-Open No. 58-7003 shown in FIG. A horizontal hole 5 is provided in the other paving slab 4, the openings of both horizontal holes 2°5 are aligned, the joint reinforcing bars 3 are pushed in with wire or compressed air, and then the filling material 6 is filled. The filling material 6 leaks to the outside through the W4 gap between the inner wall of the horizontal hole 2.5 and the joint reinforcing bar 3.

One way to eliminate this leakage is to make the connecting reinforcing bars the same diameter as the horizontal holes, but if you make them the same diameter, it will be difficult to accurately align the paving slabs so that the openings of both horizontal holes match. As a result, the problem arises that the efficiency of the installation work is significantly reduced.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems and to solve the problems, and its purpose is to provide a joint structure of concrete pavement slabs that connects concrete pavement slabs to each other via connecting reinforcing bars. The purpose is to eliminate leakage of the filling material to the outside.

[Summary of the Invention 1 This invention involves fitting an airtight backing to the joint end faces of concrete pavement slabs to be joined, and providing each horizontal hole opening in the end face of the concrete pavement slab, and forming horizontal holes in the axial direction of the horizontal holes. This is a joint structure of concrete pavement slabs in which the reinforcing bars are stored in the concrete pavement slabs, and the openings of the horizontal holes in the pavement slabs are aligned with each other in the inner part, and the backing eliminates the leakage of filler material.

[Embodiments of the invention] This will be explained based on FIGS. 1 to 3.

Precast concrete paving slab to be joined11.
12 joint end surfaces 13 and 14 are placed in abutting state. An elastic airtight backing 15 made of foamed rubber or the like is fitted between the joint end surfaces 13 and 14. A horizontal hole 16 is formed in one of the paving slabs 12 by a pipe, and one end thereof opens to the joint end surface 13, and a joint reinforcing bar 11 is slidably and loosely fitted into the horizontal hole 16. At the rear end of this joint reinforcing bar 17, a slidable backing 18 having elasticity such as foamed rubber is provided. Further, vertical holes 19 and 20 having a circular cross section and communicating with the upper surface of the paving slab 11 are provided in the deep and central portions of the horizontal hole 16, respectively.

The other paving slab 12 has one end connected to the joint end surface 14 by a pipe.
A horizontal hole 21 is formed which opens into the horizontal hole 21 . This horizontal hole 21 has a diameter slightly larger than the horizontal hole 16 provided in the paving slab 11, so that the connecting reinforcing bar 17 can be easily inserted. The length of the horizontal hole 21 is approximately half that of the horizontal hole 16,
Approximately half of the joint reinforcing bars 17 are accommodated within this horizontal hole 21. Furthermore, vertical holes 22 and 23 each having a circular cross section and communicating with the upper surface of the paving slab 12 are located at the back and front sides of the horizontal hole 21.
will be established. When the horizontal holes 16 and 21 abut each of the joining end surfaces 13 and 14 at a predetermined position, the openings of the horizontal holes 16 and 21 coincide with each other with the airtight backing 15 interposed therebetween;
Pavement slabs 11 and 12 are laid so that their axes are the same.

In the above state, after cleaning the horizontal hole 21 by blowing compressed air inside from the vertical hole 22, as shown in FIG. 16 increases, pressing the slidable backing 18 and moving the joint reinforcing bars 11 to the paving slab 12.
into the horizontal hole 21 provided in the. And bonded iron M17
The vertical hole 22 confirms that the
Stop the compressed air A visually. Next, as shown in FIG. 3, a filler 24 such as quick-setting cement or mortar is filled into the vertical hole 19.22 while visually checking the filling state through the vertical hole 20.23. Horizontal hole 16 is filled with horizontal hole 1
Filler 2 is placed in the space surrounded by 6 and backing 18.
In the other horizontal hole 21, the space surrounded by the horizontal hole 21 and the airtight backing 15 is filled with a filler 25. At this time, it is possible to prevent the filler 25 from leaking to the outside from the joint end surface 14 side, and the air in the horizontal holes 16.21 is discharged to the outside through the vertical holes 20.23. By curing the filler 24 in this way, the paving plate 11.1
2 are firmly connected by connecting reinforcing bars 17.

Note that 25 is reinforcing reinforcing bars for the pavement slabs 11 and 12, and in the embodiment, the horizontal holes 16 and 21 are formed by pipes, but they may be formed by directly bowling the pavement slabs.

As described above, during filling, the inside of the end surface 14@ of the horizontal hole 21 is partitioned by the backing 15 to prevent leakage of the filler 24 and complete filling. Furthermore, pavement version 11
．． After bonding of 12, the paving slab 11.
When 12 contracts and expands, the backing 15 compensates for the change.
Absorbed by the deformation of,! ! It is possible to prevent deformation and movement of the paving slabs 11 and 12 due to degree changes. Moreover, by providing the backing 18 at the rear end of the joint reinforcing bar 17, the horizontal hole 16
The interior on the end face 13 side is partitioned off by the backing 18, which eliminates air leakage when compressed air A is fed, and also prevents leakage of the filler 25. Further, after the paving plates 11.12 are bonded by this backing 18, the paving plates 11.12 shrink due to temperature changes.

When it expands, the change can be absorbed by the deformation of the backing 18, and the adverse effects caused by temperature changes in the paving slabs 11 and 12 can be eliminated.

Furthermore, by making the back hole 19 communicating with the horizontal hole 16.21 and the upper surface of the pavement slab 11 vertical, the opening lN9
a, 22a are circular, and as a result, the area is smaller than that of the elliptical opening, and peeling and damage to the filler 24 can be reduced.Furthermore, the center of the horizontal hole 1B communicates with the top surface of the plate 12. Vertical hole 20. and ttJl of horizontal hole 21
The front vertical hole 23 that communicates with the upper surface of the pavement slab 12 allows the movement and installation of the joint reinforcing bars 17 to be confirmed, and also serves as an air filter when filling with the filler material 24.
Enables smooth operation.

[Effect of the invention 1] This invention fits an airtight backing to the joint end faces of concrete pavement slabs to be joined, and provides each horizontal hole with a frontage on the end face of the concrete pavement slab, and the axial direction of the horizontal hole In addition to storing the bonded reinforcing bars, the openings of the horizontal holes in the paving slab are aligned in the inner part of the paving slab, which eliminates leakage of the filling material to the outside, and the bonding reinforcing bars ensure that the paving slab is properly sealed. Can be connected. Furthermore, the backing can eliminate the negative effects of concrete pavement slabs caused by temperature changes.

[Brief explanation of the drawing]

Figure M1 is a sectional view showing the state before joining, Figure 2 is a sectional view showing the state during joining, Figure 3 is a sectional view showing the state after joining, and Figure 4 is a sectional view showing the conventional method. . 11, 12...mHr & 15...Backing 16, 21...Horizontal hole 17...Coupling reinforcing bar 24.
... Filler A ... Compressed air Figure 1 Factor 3

Claims (1)

[Scope of Claims] An airtight backing is fitted to the joining end surfaces of the concrete pavement slabs to be joined, horizontal holes are provided in the end faces of the concrete pavement slabs, and the joining is performed in the axial direction of the horizontal holes. A joint structure of concrete pavement slabs, characterized by housing reinforcing bars and aligning the openings of horizontal holes of the pavement slabs in the inner part thereof.