JPH063861Y2 - Waterway structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a water channel structure which is particularly preferable for laying on soft ground.

<Prior Art and Problems Thereof> Conventionally provided water channel structures have a U-shaped cross section as shown in FIG. 2, and their bottom plates are flat. Usually, such a conventional waterway is formed of concrete (RC), so not only is it extremely heavy, but since the bottom surface is flat as described above, it can be laid on soft ground such as peat land. However, since the contact area with the ground is small, it has no bearing capacity, and as a result, it tends to sink or tilt over time due to its own weight, and sometimes move from its original location. This also causes the seam to separate, resulting in water leakage, and since it is heavier, it also causes a reduction in the efficiency of construction work. In order to prevent these problems, there is generally a demand for driving foundation piles, which is a serious problem in terms of simplification of construction and construction cost.

In addition, as disclosed in Japanese Utility Model Publication No. 46-21006, there is also a water channel block in which the bottom surface is formed thicker than the wall pressure of the vertical wall. According to this, the cross-sectional shape of the bottom surface is inverted. Since it is formed in a mold shape, it is more likely to sink than the U-shaped groove shown in FIG. 2, and if this is installed on soft ground, the tendency becomes more severe. I had it.

<Means for Solving Problems> Therefore, in order to solve the above-mentioned problems, the waterway structure according to the present invention bends the entire bottom plate of the waterway main body having vertical walls on both sides upwards to the ground of the waterway main body. The ground contact area of the canal is increased to increase the bearing capacity and levitation force, and the waterway body is molded with reinforced plastic to reduce the weight, and the wall thickness of the bottom plate of the waterway body is increased to that of the vertical wall. It is formed to be thicker than the above so as to maintain the strength of the bottom plate.

<Embodiment> Next, one embodiment of the water channel structure according to the present invention will be described with reference to FIG. 1. Reference numeral 1 is a water channel main body having vertical walls 2 on both sides, and 3 is a bottom plate of the water channel main body 1. . This bottom plate 3 is
The bottom plate 3 is formed so as to be curved upward as a whole, and the wall thickness of the bottom plate 3 is larger than that of the vertical wall 2. The waterway body 1 can be molded with concrete, but in order to reduce the weight, it is molded with reinforced plastic mixed with sawdust, for example, and the matrix used here is, for example, melamine resin. Shall be used. Reference numeral 4 is a concrete layer cast on the lower surface of the waterway body 1, and 5 is a polypropylene sheet (for example, a product name "IPM sheet" manufactured by Nippon Matai Co., Ltd.) disposed on the lower surface of the concrete layer (hereinafter, referred to as IPM sheet). It is). Reference numeral 6 is a foundation crushed stone layer, and 7 is a perforated drainage culvert.

<Effect of the Invention> As described above, according to the water channel structure according to the present invention, the bottom plate of the water channel main body is formed by curving upward, so the ground contact area is wider than that of a flat plate, Therefore, the supporting force can be increased.

In addition, if it is entirely molded with reinforced plastic, it can be made lightweight and reinforced. Compared to conventional concrete weight reduction, for example, if the size of the water channel body is 1 m long and can store 7.56 tons when the water is full, the total weight of the entire concrete structure is 13.8 t.
The weight is 85t (only the weight of the waterway body is 6.325t), while the one according to the present invention is 9.483t (in this case, melamine resin is used as the matrix.
0.121t, using Ogasutin as a reinforcing material, this is 1.802
t, that is, the total weight of the waterway body is 1.9023t),
It can be seen that the weight can be remarkably reduced.

Furthermore, making the bottom plate thicker than the vertical wall can further contribute to the improvement of strength, and further support by using the IPM sheet and foundation concrete together or by replacing with another foundation material. The strength can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the water channel structure according to the present invention, and FIG. 2 is a sectional view of a conventional example. 1 ... Channel main body 2 ... Vertical wall 3 ... Bottom plate 4 ... Concrete layer 5 ... IPM sheet 6 ... Foundation crushed stone layer 7 ... Drainage culvert

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Mikio Shiotani 19-36 Kita-jojo Nishi, Chuo-ku, Sapporo-shi, Hokkaido (56) References Japanese Patent Publication No. Sho 36-1940 (JP, B1) No. Shoji 46- 21006 (JP, Y1) Actual public Sho-45-55351 (JP, Y1)

Claims (3)

[Scope of utility model registration request] 1. A waterway structure characterized in that the entire bottom plate of a waterway body having vertical walls on both sides is curved upward. 2. The waterway structure according to claim 1, wherein the waterway main body is molded from reinforced plastic. 3. The waterway structure according to claim 1 or 2, wherein the bottom plate is formed thicker than the vertical wall.