JPS5921402B2 - Precast pavement slab laying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for laying precast pavement slabs in which press cast pavement slabs are arranged and a filler such as mortar is filled on the lower surface thereof.

Generally, when paving roads using precast pavement slabs, a paving base is created by tamping, etc., a sand layer is laid on the surface to make the surface flat, and a paving slab is laid on top of it to create a paving base. However, this method cannot completely eliminate the voids,
It cannot be used on roads that support large loads.

Therefore, in the past, a certain gap was created in advance between the roadbed and the pavement slab, and after the pavement slab was laid, a wall was formed around it to prevent filler from flowing out, and then a filler material such as cement mortar or asphalt was applied. was being injected to fill the void.

However, with such conventional methods, it is troublesome to install and remove runoff prevention walls, and if you try to inject filler every time a single paving slab is laid, you will have to install and remove runoff prevention walls each time. However, since it is extremely inefficient, it is necessary to lay a large number of them in a certain area and then fill them.

In this case, since filling is carried out over a wide area at once, the degree of filling is not satisfactory, especially on road surfaces where heavy loads are applied locally, and it is difficult to check the filling status on the entire surface.Furthermore, the precast pavement version is large. in the case of,
There were problems such as difficulty in making the finished height uniform at the joints between each paving slab.

The present invention has been made to solve the above-mentioned problems, and its gist is that precast pavement slabs are arranged on the upper surface of a pavement roadbed prepared by a conventional method, and the pavement slabs and the roadbed are In a precast paving slab laying method in which a filler is injected between the precast pavement slab, a filler injection port and an exhaust hole are formed by communicating openings from the surface to the back side of the precast pavement slab, and the bottom outer surface of the paving slab is combined. Wrap it in a resin film and lay it on the roadbed, straddle the joining edge of each pavement slab and fix temporary fittings on the top surface to make the surface height of each pavement slab uniform, and then pour the filler material. The present invention relates to a precast pavement laying method characterized by press-fitting a filler into a synthetic resin film from an inlet.

Next, an example of implementation of the present invention will be described with reference to the drawings.

1 in the figure is a concrete precast pavement plate used in this example.

This pavement version 1 is manufactured in advance at a factory.
In the center, a filler injection port 2 for backfilling is opened through the front and back sides.

A concave portion 2 with an enlarged diameter is formed at its lower end for smooth injection.

Further, near the peripheral edge, a plurality of exhaust ports 3, 3, . . . are opened through the front and back sides.

In addition, the joint end surface 1a of the peripheral edge of this paving slab 10 is
and upwardly arcuate connecting holes 4, 4 that communicate with each other on the upper surface 1b.
... are formed at regular intervals.

The paving slabs 1 are arranged one after another to form a paved surface. Prior to laying the paving slabs 1, a paving base 5 with fewer concavities on the surface is created in the construction area by tamping or other methods, as in the past. .

When laying the paving slab 1, the bottom of the paving slab 1 is wrapped in advance with a synthetic resin sheet 6 such as vinyl.

When wrapping the bottom with the sheet 6, the sheet 6 is applied to the entire bottom surface, its periphery is aligned with the peripheral edge of the paving slab 1, and the sheet is airtightly adhered using an adhesive.

Then, the pavement slab 1 whose bottom part is wrapped in this manner is connected to the connecting holes 4, 4, which are opened in the respective joint end surfaces 1a adjacent to each other.
... are placed on the roadbed 5 in communication with each other.

In this case, the paving slab 1 may be placed directly on the roadbed 5, or it may be placed on the roadbed 5 with a spacer (not shown) interposed therebetween to form a certain gap. be.

After placement, if necessary, the temporary fixing fittings 7 are fixed to the upper surface of the paving slabs 1, straddling the paving slabs 1, 1 to eliminate the difference in level at the joint.

After laying paving slabs 1, 1, etc. in this way, the third
As shown in the figure, a filler 8 is press-fitted from the filler injection port 2 described above using a suitable pump (not shown).

At this time, the filler 8 is press-fitted between the lower surface of the paving slab 1 and the sheet 6, expands the sheet 6, fits into the unevenness of the upper surface of the roadbed 5, and penetrates, pushing out the air inside through the exhaust port 3. Filling is done.

Note that this filling material 8 is injected into a plurality of paving slabs 1゜1...
It may be done after temporarily fixing and connecting them with a connecting means consisting of a connecting rod and grout which will be described later, or it may be done after temporarily fixing and before connecting by means of a connecting means. This may be done each time the roadbed 5 is placed.

In addition, when connecting the respective paving plates 1, 1, as shown in Fig. 4, an arc-shaped steel connecting rod 9 is inserted into the center of the upwardly arc-shaped connecting holes 4゜4 that communicate with each other. , grout 10 is injected from the upper surface opening, and each paving slab 1, 1 is connected by solidifying the grout 10.

In addition, it goes without saying that various other conventionally used connecting means can be used.

The precast pavement slab laying method of the present invention is configured as described above, and when laying a precast pavement slab on a paving roadbed, the bottom outer surface of the pavement slab is wrapped in advance with a synthetic resin film, and after laying, the surface of the pavement slab is Filler is injected from the side into the synthetic resin film on the back side to fill the void under the paving slab, making it possible to fill the underside with filler every time a single paving slab is laid. This eliminates the need to constantly fill a wide area as in the past, and therefore requires less filler injection pressure.Furthermore, since each paving slab is filled independently, there is no possibility of filling defects. This resulted in a good filling condition being obtained.

In addition, when filling voids, there is no need for a conventional outflow prevention wall, and the work of installing, connecting, and filling voids can be performed sequentially for each paving slab, resulting in continuous and efficient work (paving This makes it possible to lay the plates, and the time required for laying the plates is significantly reduced compared to conventional methods.

Furthermore, after the paving slabs are lined up on the roadbed, the temporary fittings are fixed across the top surface of the joint edge, and the filler is filled to the bottom surface with the space between the paving slabs evened out. As a result, the pavement surface can be leveled at the same time, greatly simplifying the work.

Furthermore, by using the paving slab for a period of time after laying it,
When repairing a partially damaged paving slab, when replacing only the damaged paving slab, it is almost impossible to fill the voids under the replaced paving slab. Particularly in the case of pavements such as runways that require precision, it is necessary to replace a wide range of parts even those that do not require repair, but even in such cases, the present invention can easily fill the voids only under the pavement slab that needs to be replaced. This means that repairs can be done economically and easily.

[Brief explanation of drawings]

The drawings show an example of the method of the present invention. Figure 1 is a partially omitted cross-sectional view of a precast paving slab wrapped in a synthetic resin film, Figure 2 is a cross-sectional view of the paving slab installed, and Figure 3 is a cross-sectional view of the paving slab installed. A cross-sectional view of the filler injected state, and FIG. 4 is a cross-sectional view of the completed state. 1... Precast pavement, 2... Filler injection port, 3... Exhaust port, 4... Connecting hole, 5... Paving. Roadbed, 6...Synthetic resin sheet, 8...Filling material.

Claims (1)

[Claims] 1. In a precast pavement slab laying method in which precast pavement slabs are arranged on the upper surface of a pavement base prepared by a conventional method and a filler is injected between the pavement slabs and the roadbed, communication is established from the front side of the precast pavement slab to the back side. The outer surface of the bottom of the paving slab is wrapped with a synthetic resin film, which is opened to form a filler injection port and an exhaust hole. A method for laying precast paving slabs, which comprises fixing temporary fixing fittings to make the surface height of each paving slab uniform, and then press-fitting a filler into the synthetic resin film through the filler injection port.