JPH0125845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterway joint structure constructed by sequentially joining factory-produced concrete products.

A connecting groove is provided on the outer surface of the joint end of concrete products for waterway construction, a connecting plate is fitted into the connecting groove facing each other in two adjacent concrete products, and a nut-shaped insert is embedded in the bottom of the connecting groove. A connecting plate type joint structure in which the connecting plate is bolted to a concrete product is already known from Japanese Utility Model Publication No. 51-52191, Japanese Utility Model Publication No. 43327-1987, and the like. In this conventional joint structure, as mentioned above, the process of embedding the nut-shaped insert and tightening the bolts of the plate is essential, but in reality, each of these processes requires a considerable amount of time and effort. However, this has become a problem when it is desired to further improve the efficiency of manufacturing concrete products for waterway construction and of connecting the concrete products.

Therefore, an object of the present invention is to provide a joint for a waterway that has a simplified structure that allows the production of concrete products for waterway construction and the work of connecting concrete products to be carried out extremely efficiently, and that is resistant to uneven settlement and upheaval. It's about providing structure.

The joint structure of the present invention will be described below with reference to the drawings. The joint structure of the present invention has a length corresponding to half of the length of the connecting plate 4 at the joint end 2 of the concrete product 1 for constructing waterways, and A connecting groove 3 having a depth corresponding to the width is provided along the longitudinal direction of the concrete product 1, and connecting grooves 3, 3 of two adjacent concrete products 1, 1 facing each other are provided.
A connecting plate 4 having upper and lower surfaces 5 and 6 curved along the width direction is fitted into the connecting plate.

In the embodiment shown in FIGS. 1 to 3, the concrete product 1 for constructing a waterway has a U-shaped longitudinal section, and the connecting groove 3 is formed at each joint end 2 of a pair of upright walls 7.
There are two on the top and two on the top. The connecting groove 3 is open to the outer surface of the upright wall 7 and the joint end surface 10 .
As shown in FIG. 3, the connecting groove 3 has an upper inner surface 8 and a lower inner surface 9 curved along the width direction, and the radius of curvature of each of the inner surfaces 8 and 9 of the connecting groove 3 is The radius of curvature of the upper and lower surfaces 5 and 6 of the plate 4 is the same. Therefore, when two concrete products 1, 1 are installed in series with their joint end surfaces 10, 10 abutting each other as shown in FIG. , the connecting plate 4 is inserted into the basin and connecting grooves 3, 3 in an unloaded state. This communication plate 4
The insertion is performed while rotating the plate 4 along the upper and lower inner surfaces 8 and 9 of the connecting groove.

After insertion, the connecting plate 4 is stably retained in the connecting groove 3 by the engagement between the curved inner surfaces 8, 9 of the connecting groove and the curved upper and lower surfaces 5, 6 of the connecting plate 4, and cannot be escaped from there. There is no.

In another embodiment shown in FIG. 4, the radius of curvature of the upper and lower inner surfaces 8, 9 of the connecting groove 3 is larger than the radius of curvature of the upper and lower surfaces 5, 6 of the connecting plate 4. Therefore, use a hammer or the like to insert the connecting plate 4 into the connecting groove 3,
3, the connecting plate 4 comes into pressure contact with the inner surfaces 8 and 9 of the connecting groove at three points a, b, and c in the longitudinal section, so that the connecting plate 4 does not escape from the connecting groove 3. In another embodiment shown in FIG. 5, the upper and lower inner surfaces 8, 9 of the connecting groove 3 are flat;
The connecting plate 4 driven into this is press-contacted at three points a, b, and c as in the previous embodiment, and is stably retained within the connecting groove 3.

As shown in FIG. 2, when joining two concrete products 1, 1, the joining end surfaces 10, 10
A standard joint material such as rubber may be pressed in between, or joint mortar may be filled. Further, the gap between the connection groove 3 and the communication plate 4 can be filled with cement mortar or grout material and sealed.

As described above, in the waterway joint structure of the present invention, the joint end 2 of the concrete product 1 for waterway construction has a length corresponding to half the length of the connecting plate 4, and a length corresponding to the width of the connecting plate 4. A connecting groove 3 having a depth is provided along the longitudinal direction of the concrete product 1, and a curved connecting plate 4 is simply fitted into the connecting groove 3, and a nut-shaped insert is installed at the bottom of the connecting groove as in the conventional plate type joint structure described above. Since there is no need to bury and fix the concrete product 1, the manufacturing work of the concrete product 1 can be carried out efficiently. In addition, there is no need to bolt the connecting plate to the concrete product as with conventional joint structures, and it can be simply inserted into the connecting groove.
The work of connecting the concrete products 1 and 1 can proceed very efficiently. In the joint structure of the present invention, since the upper and lower surfaces 5 and 6 of the connecting plate 4 are curved along the width direction, the bending strength against loads in the vertical direction is large, and it is possible to prevent uneven settlement or upheaval. Therefore, waterways that are strong against water can be constructed accurately.

The present invention can be implemented in various ways,
The direction of curvature of the connecting plate 4 and the connecting groove 3 may be directed upward as shown in FIG.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a perspective view of a concrete product for constructing a waterway and a connecting plate, FIG. 2 is a side view of the joint end of the concrete product, and FIG. 3 is an enlarged sectional view taken along line A-A' in FIG. FIG. 4 is a longitudinal cross-sectional view of a joint end of a concrete product according to another embodiment of the present invention, showing a state in which a connecting plate is fitted into a connecting groove. FIG. 5 is a longitudinal sectional view of a joint end of a concrete product in still another embodiment of the present invention. FIG. 6 is a longitudinal sectional view of a joint end of a concrete product in another embodiment of the present invention. 1... Concrete product for waterway construction, 2... Joint end, 3... Connecting groove, 4... Connection plate,
5, 6... Curved upper and lower surfaces of the connection plate, 7...
... Standing wall, 8, 9 ... Curved upper and lower inner surfaces of the connecting groove, 10 ... Joint end surface.

Claims (1)

[Claims] 1. A connecting groove 3 having a length corresponding to half of the length of the connecting plate 4 and a depth corresponding to the width of the connecting plate 4 is installed at the joint end of the concrete product 1 for waterway construction. are provided along the longitudinal direction of the connecting grooves 3, 3 of two adjacent concrete products 1, 1 facing each other,
A joint structure for a waterway, in which an upper surface 5 and a lower surface 6 are fitted with a connecting plate 4 which is curved along the width direction.