JP3713598B2 - U-shaped groove - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a U-shaped groove that can be used for agricultural and industrial waterways and drainage channels, and general civil engineering waterways and drainage channels.
[0002]
[Prior art]
Conventional U-groove made of concrete has been used as a civil engineering development site in Yamano and as a gutter drainage channel for general roads. In recent years, U-groove made of synthetic resin is used instead of U-groove made of concrete. Has reached. This U-groove made of synthetic resin is lighter than conventional U-groove made of concrete, so it is easy to handle in terms of transportation and construction, but generally has rigidity compared to that made of concrete. Since it is low, particularly when a large earth pressure is applied from the outside of the side wall, there is a problem that the side wall is easily folded and deformed. Therefore, conventionally, in the upper part of the U-shaped groove, which is the weakest part of the U-shaped groove, a bridging material to be bridged between the both side wall parts of the U-shaped groove is attached at an appropriate position in the width direction, and the bottom wall part of the U-shaped groove In order to improve the rigidity against earth pressure on the side wall portion of the synthetic resin U-shaped groove by forming a corrugated shape or a similar concavo-convex shape from the side wall portion to the side wall portion.
[0003]
Such an improved technique is disclosed in, for example, Japanese Patent No. 3065562. In the publication, a bottom wall and both side walls are formed integrally and provided in a U-shaped cross section so as to form a fluid passage, and the bottom wall is formed to improve rigidity. In the U-shaped groove formed in a corrugated shape, the upper and lower ends of the both side wall portions are formed in a U-shaped groove so that a large number of concave and convex portions extending in a direction perpendicular to the longitudinal direction are formed on both side wall portions. And a U-shaped groove characterized by comprising a partition wall portion formed integrally with the side wall portion at each upper end of the both side wall portions and filling the concave line.
[0004]
[Problems to be solved by the invention]
However, as described in the above publication, the U-shaped groove in which the partition wall portion that fills the recess on the outer surface of the side wall is formed at the upper end of the side wall has a problem with the filling property of the soil on the outer surface of the side wall and in the vicinity thereof was there. That is, in the vicinity of the upper end of the side wall, the partition wall portion extends outward to cover the concave line like a ridge, so that the concave line portion is not easily filled with earth and sand, and a gap is formed between the side wall and the outer surface. Cheap. The presence of such voids not only causes the sand around the U-shaped groove to erode due to the infiltration of rainwater and causes the U-shaped groove to rise, but also the presence of the void causes the load of earth pressure on the side wall of the U-shaped groove. Becomes non-uniform, and the possibility of inward deformation of the U-shaped groove increases in each step. Such adverse effects need to be eliminated even if the degree of improvement in rigidity is somewhat suppressed.
The present invention has been made under such circumstances, and the problem to be achieved is that the earth and sand can be filled without gaps in the vicinity of the upper end of the side wall, so that the required rigidity per side wall is maintained. Another object of the present invention is to provide a U-shaped groove capable of effectively preventing side wall deformation due to uneven load of earth pressure.
[0005]
[Means for Solving the Problems]
As a result of diligent research, the inventors of the present invention have a U-shaped groove that is formed into a corrugated shape and the right and left side walls rise vertically from the bottom wall, and the protruding portion is narrowed inward at the upper part of the side wall. Reinforcement having a ridge on the outer edge extending outward from the upper end of the side wall by continuously forming in the longitudinal direction a flat vertical wall from which the ridge and the ridge are eliminated. Even if the wall is formed, it is found that the earth and sand can be filled without gaps in the vicinity of the upper end of the side wall portion (below the reinforcing wall), and further, the ridge portion is squeezed inward, Combined with the configuration of forming the reinforcing wall and providing the rib part at the required location on the outer surface of the vertical wall, it can effectively prevent the torsional deformation and local deformation of the side wall part and provide the required rigidity. The present invention has been completed by finding that it can be retained.
That is, the present invention provides a hard synthetic resin or fiber reinforced molded into a corrugated shape by alternately forming concave and convex portions extending from the bottom wall portion to the upper portions of the left and right side wall portions in the longitudinal direction of the groove. In the U-shaped groove made of resin,
The left and right side walls have a shape that rises vertically from the bottom wall,
The upper portions of the left and right side wall portions are formed so that the concave strips and the convex strips disappear as the convex strips are squeezed inward, and a substantially flat vertical wall is formed substantially continuously in the longitudinal direction. Each of which is formed by continuously forming a flat reinforcing wall extending in the longitudinal direction, extending outward from the upper ends of the left and right side wall portions, blocking the concave strip portion, and extending further outward from the top of the convex strip portion,
Further, the reinforcing wall is formed on its upper surface by extending a ridge portion rising from its outer edge in the longitudinal direction of the U-shaped groove,
Further, on the outer surface side of the left and right vertical walls, the rib portions are provided so as to extend vertically from the portion where the concave and convex portions disappear to the lower portion of the vertical wall. It is related with the U-shaped groove characterized by these.
In a preferred aspect of the present invention, a bridging material having a substantially L-shaped cross section is provided between the left and right side wall portions, and the left and right side wall portions are respectively end portions of the bridging material. It is characterized by forming a substantially L-shaped bridging material receiving portion that can be fitted, or the left and right side wall portions are provided with bulging portions that protrude outward to increase rigidity. The present invention relates to the above-mentioned U-shaped groove.
[0006]
In order to improve rigidity, the U-shaped groove in the present invention has a wave shape by alternately forming concave and convex portions extending from the bottom wall portion to the upper portions of the left and right side wall portions in the longitudinal direction of the groove. However, the concave stripes and the convex stripes have a structure that disappears in the upper part of the left and right side walls. That is, the upper part of the left and right side wall portions has a structure in which a reinforcing wall extending outward from the upper end of the side wall portion is formed because a substantially flat vertical wall without unevenness is formed substantially continuously in the longitudinal direction. However, in the embedding operation, the periphery of the U-shaped groove can be easily and uniformly filled with earth and sand. Therefore, no gap is formed near the outer surface of both side walls of the U-shaped groove, especially between the upper part and the surrounding earth and sand, and is kept in close contact with the surrounding earth and sand, due to ground subsidence and inflow of rainwater. There is very little possibility of causing the U-shaped groove to rise. Further, the upper part of the left and right side wall portions only needs to be formed so that a substantially flat vertical wall is formed substantially continuously in the longitudinal direction. In order to form the fitting portions at both ends of the bridging material to be laid, it may have a shape in which several portions that are formed to be thick and protrude are present. The left and right side wall portions further extend outward from the upper end thereof, the reinforcing wall is continuously formed in the longitudinal direction, and the reinforcing material can be attached along the longitudinal direction in order to further improve the rigidity of the U-shaped groove. Due to the presence of this reinforcing wall, the upper part of the left and right side walls of the U-shaped groove is less likely to be bent or twisted by earth pressure. The width of the reinforcing wall may be shorter or longer than the interval between the bottom of the concave ridge and the top of the convex ridge, and in the case of being longer, it preferably has a length up to five times the interval. If the interval is 5 times or more, the rigidity hardly increases and the production cost increases, which is not preferable.
In addition, a ridge is extended on the upper surface of the reinforcing wall in the longitudinal direction of the U-shaped groove. The protruding portion may be formed continuously in the longitudinal direction of the U-shaped groove with the reinforcing wall rising vertically upward from the outer edge of the protruding wall, or at the center of the upper surface of the reinforcing wall. It may be a simple protrusion formed continuously in the longitudinal direction. Due to the presence of this protrusion, the reinforcing wall is difficult to deform, and further rigidity is given to the upper portions of the left and right side wall portions of the U-shaped groove, and the rigidity can be improved similarly to the reinforcing wall itself. . At the same time, in the U-shaped groove of the present invention, rib portions are provided on the outer surfaces of the left and right vertical walls, respectively, whereby the rigidity of the upper portions of the left and right side wall portions of the U-shaped groove can be further enhanced. It has a structure. The rib portion is usually provided from the concave portion and the portion where the convex portion disappears to the lower portion of the vertical wall. However, depending on the situation in the field, the rigidity can be further improved particularly with respect to the force from the upper portion of the U-shaped groove. If necessary, it is also preferable to have a shape extending continuously from the portion where the concave and convex portions disappear to the lower side of the reinforcing wall through the vertical wall.
In the U-shaped groove of the present invention, a bridging material can be attached between the upper portions of the left and right side wall portions, and as examples, a substantially L-shaped, substantially T-shaped or substantially cross-shaped crossing can be used. A bridging material having a surface can be mentioned. These bridging materials can be fixed to the U-shaped groove by fitting both ends thereof to the left and right side wall portions of the U-shaped groove. For example, when a bridging material having a substantially L-shaped cross section is attached, a substantially L-shaped bridging material receiving portion corresponding to the shape of both ends of the bridging material is formed in advance on the left and right side wall portions of the U-shaped groove. In addition, the bridging material can be easily fixed to the U-shaped groove by fitting both ends of the bridging material into the receiving portions at the time of construction. Further, as another method for fixing the bridging material to the U-shaped groove of the present invention, there is an embodiment in which the bridging material is attached by rivets on the left and right reinforcing walls of the U-shaped groove. In this case, both ends of each bridging member must be provided with holes for passing rivets and cut out so as to be assembled between the left and right side wall portions of the U-shaped groove. By attaching these bridging materials to the U-shaped groove, it is possible to obtain a favorable effect such as further imparting rigidity to the upper portions of the left and right side wall portions of the U-shaped groove.
Furthermore, the U-shaped groove of the present invention can be provided with bulging portions protruding outward on the left and right side wall portions. As a result, not only can rigidity be added to the U-shaped groove, but also the U-shaped groove can be fixed more effectively because sediment is deposited on the bulging portion when the U-shaped groove is buried. And it helps to prevent the U-shaped groove from rising due to the rise of the groundwater level.
The material of the U-shaped groove of the present invention is preferably a hard synthetic resin such as polyethylene resin, polyvinyl chloride, polypropylene, polyethylene terephthalate, polyamide, and polyphenylene sulfide, and fiber reinforced resin such as FRP and FRTP. As the shape of the U-shaped groove main body, in addition to the original U-shape, a shape rising vertically from the bottom of the wall or a shape rising slightly outward toward the top may be taken. The U-shaped groove of the present invention can be formed by blow molding, rotational molding or the like.
[0007]
【Example】
The present invention will be described in more detail with reference to the drawings. The following examples are not intended to limit the invention.
[0008]
Example 1.
Examples of the U-shaped groove of the present invention are shown in FIGS. FIG. 1 is a perspective view showing a U-shaped groove 1 of the present embodiment, FIG. 2 is a plan view of the U-shaped groove 1 of the present embodiment, and FIG. 3 is a side view thereof. As can be seen from these drawings, in the U-shaped groove 1 of the present embodiment, the concave strips 4 and the convex strips 5 extending from the bottom wall 2 to the upper portions of the left and right side walls 3 are alternately arranged in the longitudinal direction of the groove. By forming continuously, it is formed into a waveform. However, at the upper part of the left and right side wall portions 3, the concave strip portion 4 and the convex strip portion 5 are eliminated, and a substantially flat vertical wall 6 is formed substantially continuously in the longitudinal direction. The vertical wall 6 is basically a flat wall that is continuous in the longitudinal direction of the U-shaped groove 1, but is adapted to fit both ends of the bridging material 12 that is horizontally mounted between the left and right side wall portions of the U-shaped groove. In order to form the receiving portion 13, only that portion has a thick structure and has a shape protruding slightly outward. Further, at the upper ends 21 of the left and right side wall portions 3, the reinforcing wall 7 extends outward from the upper ends, closes the concave strip portion 4, and further extends outward from the flange 22 of the convex strip portion 5. It is a wall and is formed continuously in the longitudinal direction of the U-shaped groove 1. In the present embodiment, the width of the reinforcing wall 7 is set to be slightly longer than the distance between the bottom 23 of the recess 4 and the hook 22 of the protrusion 5. The outer edge of the upper surface of the reinforcing wall 7 has a shape in which the protrusions 8 are continuously formed in the longitudinal direction of the U-shaped groove 1. Due to the presence of these reinforcing walls 7, the rigidity of the left and right side wall parts 3 is further improved, particularly at the upper part, and the rigidity of the reinforcing wall 7 itself is also improved by the formation of the ridges 8. Increases resistance to earth pressure. In the present embodiment, as described above, the protruding portion 8 has a structure that rises from the outer edge of the reinforcing wall 7 and is continuously formed in the longitudinal direction of the U-shaped groove 1. It may take a structure in which it rises from substantially the center of the upper surface and is continuously formed in the longitudinal direction of the U-shaped groove 1, or rises from the inner edge of the reinforcing wall 7 and is continuously formed in the longitudinal direction of the U-shaped groove 1. You may take the structure which is made.
In order to give further rigidity to the U-shaped groove to the reinforcing wall 7, a reinforcing member 9 shown in the front view of FIG. 4 (a) and the plan view of FIG. 4 (b) can be attached along the longitudinal direction. A hole 9a for passing a rivet 10 made of hard synthetic resin or fiber reinforced resin shown in FIG. 5 (a) plan view and FIG. 5 (b) front view is formed in the reinforcing member 9 at an appropriate location. The reinforcing material 9 is attached to the reinforcing wall 7 by the rivet 10 in a state in which the holes 9a and the holes 7a through which the rivets 10 formed in the reinforcing wall 7 pass are aligned.
In addition, rib portions 11 are provided on the outer surface sides of the right and left vertical walls 6, respectively, and FIG. 6 (a cross-sectional view taken along line AA in FIG. 2) and FIG. 7 (B- in FIG. 2). As can be seen from the cross-sectional view taken along line B), the recess 4 and the protrusion 5 are formed so as to extend vertically from the portion where the protrusions 5 and 5 disappear to the lower part of the vertical wall 6. Thereby, compared with the case where the rib part 11 does not exist, the further rigidity improvement effect is given to the upper part of the side wall part 3 of the U-shaped groove 1, and against the earth pressure acting from above the U-shaped groove 1 and from the side. And increased resistance. The shape of the rib portion 11 is not particularly limited, but a shape that is easy to mold is preferable in terms of production efficiency.
Further, the U-shaped groove 1 is mounted with a bridging material for laterally fixing between the left and right side wall portions 3 of the U-shaped groove 1, for example, a bridging material 12 having a substantially L-shaped cross section shown in FIG. be able to. As shown in FIG. 1 and FIG. 3, the bridging material 12 is fitted into a substantially L-shaped bridging material receiving portion 13 provided at both ends on the inner surface of the upper part of both side walls of the U-shaped groove 1. Since there is no need to wear it, workability is good. Further, as another bridging material for laterally mounting and fixing between the left and right side wall portions 3 of the U-shaped groove 1, the bridging material 14 having a substantially L-shaped cross section shown in FIGS. 9 to 11, respectively. The crossing member 15 having a substantially T-shaped cross section or the crossing member 16 having a substantially cross-shaped cross section can be used. These bridging members 14, 15, or 16 have holes 14 a, 15 a, 16 a for passing rivets at both ends thereof, and are drilled on the reinforcing wall 7 of these holes and the U-shaped groove 1. The holes 7a are aligned and attached with rivets 10. Since each bridging material is cut out so that both ends thereof are attached on the reinforcing wall 7 of the U-shaped groove 1 by using the rivet 10, it is located below the upper surface of the side wall 3. It can be assembled as follows.
Furthermore, the left and right side wall portions 3 of the U-shaped groove 1 of the present invention are provided with a bulging portion 17 for enhancing rigidity, as shown in FIGS. The side wall portion is further provided with increased rigidity. The bulging portion 17 not only has an effect of imparting rigidity, but also has an effect of preventing the U-shaped groove 1 from rising because sediment is accumulated when it is buried in the soil and a load is applied from above. Since the bottom wall 2 of the U-shaped groove 1 is provided with the anti-floating material support groove 19 for fitting the anti-floating material 18 as shown in FIGS. 1 and 3, the anti-floating material 18 is provided in this portion. By assembling, a further anti-floating effect can be obtained.
Thus, even if the U-shaped groove of the present embodiment forms a reinforcing wall extending outward from the upper end of the side wall, the sand and sand can be filled without gaps in the vicinity of the upper end of the side wall (below the reinforcing wall). Thus, local deformation and the like can be effectively prevented and the required rigidity can be maintained.
[0009]
Example 2 .
The second embodiment is shown in FIGS. In the second embodiment, instead of the rib portion 11, the rib portion 20 is continuously extended from the portion where the concave stripe portion 4 and the convex stripe portion 5 disappear to the lower side of the reinforcing wall 7 through the vertical wall 6. ing. Other configurations are the same as those of the first embodiment. As can be seen from FIG. 15 (cross-sectional view taken along the line CC in FIG. 13) and FIG. 16 (cross-sectional view taken along the line DD), the concave portion 4 and the convex portion 5 are eliminated. Further, a rib portion 20 is continuously formed through the vertical wall 6 to the lower side of the reinforcing wall 7. For this reason, the vertical wall 6 has a structure in which the rigidity against pressure from above is further increased, and the upper end of the side wall portion of the U-shaped groove is less likely to be damaged or deformed.
[0010]
【The invention's effect】
As described above, even when the U-shaped groove of the present invention has a structure including a reinforcing wall extending outward from the upper end of the side wall portion, when buried, earth and sand are not sufficiently filled in the vicinity of the upper end of the side wall. This eliminates the disadvantage that a gap is easily formed between the side wall of the U-shaped groove and the surrounding earth and sand. Therefore, the U-shaped groove of the present invention can be filled with earth and sand without gaps in the vicinity of the upper end of the side wall, so that the required rigidity of the side wall can be maintained and the side wall can be deformed due to uneven load of earth pressure. It can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a U-shaped groove of the present invention.
FIG. 2 is a plan view showing one embodiment of a U-shaped groove of the present invention.
FIG. 3 is a side view of the U-shaped groove shown in FIG.
FIG. 4 is a front view (a) and a plan view (b) of a reinforcing member.
FIG. 5 is a plan view (a) and a front view (b) of a rivet.
6 is a cross-sectional view of a concave portion of a U-shaped groove cut along line AA in FIG.
7 is a cross-sectional view of a protruding portion of a U-shaped groove cut along line BB in FIG.
FIG. 8 is a plan view (a), a front view (b), and a side view (c) of a bridge member having a substantially L-shaped cross section.
FIG. 9 is a plan view (a), a front view (b), and a side view (c) of a bridge member having a substantially L-shaped cross section.
FIG. 10 is a plan view (a), a front view (b), and a side view (c) of another bridging member having a substantially T-shaped cross section.
FIG. 11 is a plan view (a), a front view (b) and a side view (c) of another bridging member having a substantially cross-shaped cross section.
FIG. 12 is a perspective view showing another embodiment of the U-shaped groove of the present invention.
FIG. 13 is a plan view showing another embodiment of the U-shaped groove of the present invention.
14 is a side view of the U-shaped groove shown in FIG.
15 is a cross-sectional view of a concave portion of a U-shaped groove cut along line CC in FIG.
16 is a cross-sectional view of a concave portion of a U-shaped groove cut along line DD in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 U-shaped groove 2 Bottom wall part 3 Side wall part 4 Convex part 5 Convex part 6 Vertical wall 7 Reinforcement wall 7a Hole 8 Projection part 9 Reinforcement material 10 Rivet 11 Rib part 12 Bridging material 13 Bridging material receiving part 14 Crossing material 15 Crossing material 16 Crossing material 17 Swelling portion 18 Lifting prevention material 19 Lifting prevention material support groove portion 20 Rib portion 21 Upper end of side wall portion 22 Ridge of ridge portion 23 Bottom of ridge portion

Claims (3)

A U-shape made of hard synthetic resin or fiber reinforced resin formed into a corrugated shape by alternately forming concave and convex portions extending from the bottom wall portion to the upper part of the left and right side wall portions in the longitudinal direction of the groove. In the groove
The left and right side walls have a shape that rises vertically from the bottom wall,
Upper portion of the left and right sidewall portions, together with the convex portion is lost the concave portion and the convex portion by being squeezed inwardly and formed by substantially continuously a substantially flat vertical walls in the longitudinal direction each become flat reinforcing walls extending further outward than the top of the extending outward from the upper end of the side wall portions of the left and right closing the concave portion and the convex portion continuously formed in the longitudinal direction,
Further, the reinforcing wall is formed on its upper surface by extending a ridge portion rising from its outer edge in the longitudinal direction of the U-shaped groove,
Further, on the outer surface side of the left and right vertical walls, rib portions are provided so as to extend vertically from the portion where the concave and convex portions disappear to the lower portion of the vertical wall. Characteristic U-shaped groove. A bridging material having a substantially L-shaped cross section is provided between the left and right side wall portions, and the left and right side wall portions are each capable of engaging with an end portion of the bridging material. U-shaped groove according to claim 1, characterized in that to form the passing material receiving portion hung L-shaped. The side wall portion of the left and right, U-shaped groove according to claim 1, characterized by being provided with a bulge projecting outwardly to increase the rigidity.

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