JPS5947084B2 - Connection structure of pavement slab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection structure for precast or cast-in-place pavement slabs.

In general, when two or more so-called precast pavement slabs of reinforced concrete, etc., which are produced in a factory or poured and demolished at the site are laid in advance to form two surfaces of pavement such as a road or an airport, or on-site, the pavement is spread to an appropriate width. Several methods have been proposed for connecting the divided concrete pavement slabs to each other when forming a paved surface by pouring concrete into the concrete pavement slabs.

As one example, as shown in Fig. 1, a plurality of paving plates 1
, 1... are connected using P, C steel @ 2, 2... by tensioning them vertically and horizontally in the in-plane direction of the plate, but in this case, P, It is necessary to find a place to install the equipment that introduces prestress into the C steel wire, and there are problems such as restrictions on the pavement width in the width direction, especially in places where the road width is narrow.

In addition, as another connection method, as shown in Figure 2, the pavement plate 1
, 1... are connected to each other with bolts 3, 3..., or as shown in Fig. 3, reinforcing bars 4 are made to protrude from the joint end surface of one pavement slab 1, and the reinforcing bars 4 are connected to the other pavement slab. There is a method of embedding and connecting the protruding part of the reinforcing bar 4 in the notch 5 of 1 with a filler 6, but these methods depend on the strength of the bolt 3, reinforcing bar 4, etc., or the adhesion with the filler. Since it depends on the strength, it has the disadvantage that the proof strength of the connecting part is not sufficient.

The present invention has been made in view of the above points, and is capable of providing a novel pavement slab connection structure that can eliminate these drawbacks.

That is, the gist of the present invention is to provide an arc-shaped connecting hole that communicates between the joint end surfaces of both paving slabs that are connected to each other, and whose both ends are open to the front side of the paving slabs, and in which the connecting hole is provided. The connecting structure of the paving slabs consists of inserting an arc-shaped connecting rod across both the paving slabs, filling the connecting hole with a filler, and burying and fixing the connecting rod in the connecting hole. .

Embodiments of the present invention will be described below with reference to the drawings.

First, the first method using the present invention for connecting precast pavement slabs.
An embodiment will be described with reference to FIGS. 4 to 7.

A in the figure is a precast pavement version.

As shown in FIG. 4, this pavement version A has a joint end surface 10
and an arc-shaped connecting hole 1 with both ends open on the front side 11.
2 is formed in advance.

A plurality of these connecting holes 12 are formed at appropriate intervals along the edge of the pavement slab A, and the interval and number are determined based on the design conditions, the required strength of the joint, construction conditions, etc. do.

Therefore, in order to connect a plurality of paving plates A, it is necessary to
Paving slabs A are connected to each other as shown in the figure.

The connecting end surfaces 10.10 are made so that the openings 12a, 12a of the connecting holes 12, 12 facing each other are aligned with each other.
to join.

When joining, for example, as shown in FIG. 5, the fixing device 13 is installed across the pavement slabs A and A, and a plurality of anchor nuts 14.
14... are fastened and fixed by screwing bolts 15, 15... to paving plate A.

The plane change between A and A is made constant and mutual positional deviation is prevented.

Thereafter, as shown in FIG. 6, the connecting rod 16 is inserted into the connecting hole 12.
Insert from b and hang horizontally.

As described above, the connecting rod 16 is connected to a pair of precast pavement plates A.
, A has an arc-shaped cross-sectional shape corresponding to the arc-shaped hole formed by communicating the opposing connecting holes 12, 12 of A.

Also, the diameter of the connecting rod 16 is smaller than the diameter of the connecting hole 12, so that there is a certain gap between the connecting rod 16 and the peripheral surface of the connecting hole 12, and the connecting rod 16 is positioned at the center of the connecting hole 12. Position.

In terms of material, it is preferable to use steel, and so-called deformed steel bars may be used in order to improve adhesion with the filler described later.

In addition, the connecting rod 16 may have a length that can connect the paving plates sufficiently firmly in terms of strength, and does not necessarily have to be long enough to connect the connecting holes 16 that communicate with each other.
It is not necessary to form it equal to the total length of 2.12.

After installing the connecting rod 16, filler material 17 is filled by an appropriate means through the opening 12b on the front side of the connecting hole 12,
Pavement version A is created by integrating the solidification sill connecting rod 16 and both pavement versions.
, A mutual connection is completed.

Thereafter, as shown in FIG. 7, the fixture 13 is removed, and the hole in the anchor nut 14 is drilled as necessary.

The filling material 17 is preferably one that solidifies in a short time and exhibits strong strength, such as quick-setting cement, but ordinary cement mortar may also be used.
6 and the circumferential surface of the connecting hole 12, so that the connecting rod 16 and the concrete body of the precast paving slab A can fit together and maintain sufficient strength. is a condition.

In the first embodiment described above, the connecting holes 12 are directly opened in the precast pavement version A, but these connecting holes 12 are made of polychloride as in the second embodiment shown in FIGS. 8 and 9. A hollow tube 20 made of synthetic resin such as vinyl may be buried in the precast pavement plate A in advance and opened. In this case, as shown in FIG. 9, the hollow tube 20 made of synthetic resin such as vinyl
The connecting end openings 20a, 20a of the paving plates A, A are connected to each other by communicating with each other, and the connecting rod 16 is inserted into the hollow tube 20.
is inserted, and the filling material 17 is injected to embed and fix.

In this case, as shown in FIG. 9, the hollow tube 20 has the same diameter over its entire length, and in addition, as shown in the third embodiment of FIG. It is also possible to use a tapered one in which the diameter is the maximum diameter and the opening 12b on the front side is made small in diameter.

By forming the connection hole 12 with the hollow tube 20 in this way, if some of the pavement slabs A are damaged after connection, etc.
When a part of the pavement slab A is removed by cutting the filler 17 between the joint end faces and the connecting rod 16 from the surface side with a cutter, as shown in Fig. 11, inside the pavement slab A that remains. The empty pipe 20 or the filler material 17 and connecting rod 16 inside it can be removed, and a new paving slab A can be inserted into the removed portion and connected in the same manner as described above.

In this case, by forming the hollow tube 20 in a tapered shape, it becomes easy to remove the hollow tube 20 after cutting, and the load resistance between the joint end surfaces is increased.

Although the above-mentioned embodiments show examples in which precast pavement slabs are connected, the present invention can also be used to connect cast-in-place pavement slabs, and as shown in Figs. Concrete is poured with both paving plates B and B connected to each other, and at that time, both paving plates B and B are placed at the joint.
A continuous hollow tube 21 is buried across the pavements B and B, and both ends thereof are opened to the front surfaces 11 and 11 of both pavement slabs B and H.

After the concrete hardens for the paving slabs B and B, the connecting rod 16 is inserted into the hollow pipe 21 in the same manner as in the embodiment described above, filler 1γ is injected, and the connecting rod 16 is buried in the hollow pipe 21. do.

22 in the figure is the boundary joint between the pavement slabs B and B.

In addition, in this fourth embodiment, only the hollow tube 21 is buried first when forming the paving slabs B and B, but in this case, the connecting rod 16 is inserted into the hollow tube 21 in advance. However, the filler 17 may be injected and buried.

In addition, the hollow tube 21 in this case has a maximum diameter at the center and a tapered shape at both ends, as shown in FIGS. 12 and 13. In addition to burying the tube at the joint end surface, a hollow tube 23 having the same diameter may be used over the entire length as shown in FIG. 14.

The connecting structure of the paving slabs of the present invention is constructed as described above, and when connecting the paving slabs, instead of simply burying the connecting rod across both paving slabs, a connecting hole with a diameter larger than the connecting rod is installed in the pavement. By inserting a connecting rod into the plate, embedding it with the filler and solidifying it, and making the connecting hole arc-shaped, the filler and the connecting rod work together in the connecting hole to support the load. The stress in the horizontal and vertical directions at the connecting portions is dispersed, and the load is transferred smoothly, resulting in much greater bending and shear strength than in the past.

Moreover, since all the connection work can be done from the front side of the pavement slab, the workability is very good and no extra work space is required.

In addition, in connection with bolts, if the position of the connecting hole is shifted even slightly, the connection becomes impossible, but with the present invention, even if the connecting hole is slightly shifted, the connection can be made reliably. It has the following useful effects.

[Brief explanation of drawings]

1 to 3 are vertical sectional views showing a conventional method of connecting precast pavement slabs, FIG. 4 is a partial perspective view of a precast pavement slab used in the first embodiment of the present invention, and FIG.
The figure is a vertical cross-sectional view of the connected state of the same precast pavement slab, No. 6
The figure is a vertical sectional view showing the connected state, FIG. 7 is a vertical sectional view of the completed connected state, FIG. 8 is a partial perspective view of the precast pavement used in the second embodiment of the present invention, and FIG. 9 is a vertical sectional view showing the connected state. 10 is a vertical sectional view showing the completed connection state of the third embodiment, FIG. 11 is a partial perspective view showing the state after being partially extracted after connection, and FIG. 12 13 is a longitudinal cross-sectional view showing the state of the hollow pipe in the fourth embodiment, FIG. 13 is a vertical cross-sectional view showing the state after the connection is completed, and FIG. 14 is a longitudinal cross-sectional view showing the state of the hollow tube in the fourth embodiment. FIG. 3 is a partially longitudinal front view. A: Precast pavement version, B: Cast-in-place pavement version, 10: Joint end surface, 11:
...Front side, 12...Connection hole, 16...
・Connecting rod, 17... Filler, 20.21, 23
...Hollow tube.

Claims (1)

[Claims] 1. Communication between the joint end surfaces of both pavement slabs that are connected to each other,
and an arc-shaped connecting hole with both ends opened on the front side of both the paving slabs, an arc-shaped connecting rod is inserted into the connecting hole so as to span both the paving slabs, and the connecting hole is filled. A connecting structure of paving slabs, which is formed by filling the connecting hole with material and fixing the connecting rod by burying it in the connecting hole. 2. A connection structure for pavement slabs according to claim 1, wherein the connecting holes are formed by embedding arc-shaped hollow pipes in the pavement slab. 3. A connecting structure for paving slabs according to claim 2, wherein the hollow tube is buried across both paving slabs at the same time as both paving slabs are formed. 4. The pavement according to claim 2, wherein the hollow tube is buried in each pavement slab with one end opened at the joint end surface of each pavement slab and the other end opened at the front side of the pavement slab. Connection structure of the plate. 5. The connecting structure of paving slabs according to claim 2, 3, or 4, wherein the hollow space is formed in a tapered shape with a maximum diameter at the joint end surface portion of the paving slabs. 6. A connecting structure for pavement slabs according to claim 2 or 3, wherein the hollow space is formed of a synthetic resin material such as polyvinyl chloride.