JP2018059362A - Catch basin, u-shaped side gutter, and construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catch basin, an upper basin thereof, and a U-shaped side gutter that are provided with a function of preventing settlement of a peripheral structure of the catch basin or the U-shaped gutter and a method for constructing the same.SOLUTION: A catch basin (1) comprises: a container-shaped basin body (10) and a cylindrical upper basin (20) overlapped above the basin body (10). The upper basin (20) includes a projecting support part (21) projecting outward entirely therearound, an upper face (21a) of the projecting support part (21) is inclined to be lowered toward an outer peripheral edge (21b) thereof, and the outer peripheral edge (21b) is positioned further outward than a side wall outer face (11a) of the basin body (10) entirely therearound.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drainage basin, a U-shaped side groove, and a construction method using these.

  The drainage basin in the present specification is a concrete structure buried underground to collect and accumulate rainwater and the like from the ground or from a gutter. Although sometimes referred to as a rainwater tank or a water collecting tank, it is referred to as a “drainage tank” in this specification.

  In the construction of burying drainage pits, it is common to place the excavated soil back after digging the ground and then laying a pavement on it. Therefore, there is usually a layer structure composed of the ground, the roadbed of the pavement, and the material of the pavement around the drainage basin. The structure existing around these drainage basins will be referred to as “surrounding structure” in the present specification.

  One of the problems with drainage basins is known to cause damage and deformation of the drainage basin itself and drainage pipes connected to it due to liquefaction during earthquakes and uneven settlement of surrounding structures. As described in Patent Documents 1 and 2, it has been proposed to give the drain pipe flexibility. However, these measures do not attempt to prevent unequal settlement of the drainage basin and its surrounding structure.

JP-A-7-3874 JP-A-6-229002

  FIG. 10 is a schematic cross-sectional view for explaining the problem of the settlement of the surrounding structure composed of ground, pavement, etc. existing around the drainage basin. The sectional view of FIG. 10 (a) shows a drainage basin 100 as a conventional example. The drainage basin 100 is buried in the pavement of the roadbed P1 and the pavement P2 whose lower part is buried in the ground G and whose upper part is laid on the ground G.

  The concrete drainage basin 100 has a substantially rectangular parallelepiped shape as a whole in the illustrated example. In the example shown in the figure, a two-part structure is used, and an upper basket 102 that is a cylindrical frame is placed on a container-like basket body 101, and a mortar 142 joins them. The grating lid 103 is placed in the upper surface opening, and the upper surface of the grating lid 103 coincides with the surface of the pavement P2 and is in the same plane. Note that the upper ridge 102 is not limited to one, and two or three upper ridges 102 may be stacked for depth adjustment.

  A board-shaped heat insulating material 141 is attached to the outer surface of the side wall of the drainage basin 100. However, particularly in cold regions, the effect of the heat insulating material 141 is insufficient. When cold air enters the interior space of the drainage basin 100 through the grating lid 103, a frost heave phenomenon occurs in the surrounding ground G, and by repeating freezing and thawing, a cavity S is generated in the periphery as shown in FIG. As the walls and ceiling of the cavity S collapse, the cavity S gradually moves upward to become a large space as shown in FIG. The base layer P1 and the pavement P2 above the cavity S will lose their support layers. Then, as shown exaggeratedly in FIG. 10C, the pavement P2 is split at the upper edge of the drainage basin 100, and the pavement P2 and the roadbed P1 fall into the cavity S. As a result, a groove is formed around the drainage basin 100, and the upper part of the drainage basin 100 protrudes.

  FIG. 10 (c) is an extreme example, but it often occurs that the pavement P2 cracks and the surrounding pavement slightly sinks. This situation is referred to herein as “sedimentation of surrounding structures”. Such subsidence is partly because the ground G is excavated and backfilled when the drainage basin 100 is installed. Although the ground is compacted at the time of backfilling, the ground around the drainage basin is looser than the normal ground. Therefore, land subsidence is likely to occur due to loads of surrounding vehicles and snow.

  When such subsidence occurs in the surrounding structure of the drainage basin, rainwater or the like cannot flow into the drainage basin, but accumulates around the drainage basin and permeates into the underground as it is. This further advances the settlement of the surrounding structure and damages the pavement. Moreover, the state where the upper part of the drainage basin protrudes is also a serious problem for people and vehicles, such as a pedestrian hits and falls.

  A similar problem occurs also in a concrete U-shaped side groove embedded in the ground and having a grating lid placed on the upper surface opening.

  In view of the above situation, the present invention has an object to provide an improved drainage basin and a U-shaped side groove having a function of preventing the settlement of the surrounding structure of the drainage basin and the U-shaped side groove, and a construction method using them. To do.

In order to achieve the above object, the present invention provides the following configurations. The numbers in parentheses are reference numerals in the drawings to be described later and are attached for reference.
-One aspect of the present invention is a drainage basin (1) comprising a container-like casket body (10) and a cylindrical upper casket (20) stacked on the casket body (10). And
The upper flange (20) has an overhanging support portion (21) projecting outward over the entire circumference thereof,
The upper surface (21a) of the overhanging support portion (21) is inclined so as to become lower toward the outer peripheral edge (21b), and the outer peripheral edge (21b) extends over the entire periphery of the heel body (10 ) Is located outside the side wall outer surface (11a).
-Another aspect of the present invention is a cylindrical upper trough (20) that is a member forming the uppermost portion of the drain trough (1),
An overhanging support portion (21) that protrudes outward over the entire circumference, inclines so that its upper surface (21a) becomes lower toward the outer peripheral edge (21b), and its lower surface (21c) is horizontal,
A receiving portion (21e) for the grating lid (30) formed on the inner peripheral edge of the upper surface (21a) of the overhanging support portion (21);
And a leg portion (22) protruding downward from the lower surface (21c) of the overhanging support portion (21).
-Yet another aspect of the present invention is a U-shaped side groove (6),
In the vicinity of the upper edge of the side wall outer surface (61a) of the side groove body (60), there is a long part (70) attached in parallel to the upper edge,
The long component (70) includes a plate-like attachment portion (72) that can be attached to the outer surface (61a) of the side wall, and a plate-like extension support portion that protrudes outward from the lower edge of the attachment portion (72). (71), and the overhanging support portion (71) is inclined so as to become lower toward the outer edge (71a).
-Another aspect of the present invention is a plate-like long part (70) attached to the side wall outer surface (61b) of the side groove body (60) to prevent the surrounding structure of the U-shaped side groove (6) from sinking. There,
One bent line extending in the longitudinal direction is bent at an obtuse angle (α2), and one side of the bent line has a predetermined width that can be attached to the side wall outer surface (61a). (72), and the other side is an overhanging support portion (71) having a predetermined width to support the surrounding structure.
-Yet another aspect of the present invention is a construction method for installing the drainage basin (1) described above,
Excavating the ground (G) of the installation location and forming a hole of a predetermined size;
Installing the heel body (10) at the bottom of the hole, and attaching a heat insulating material to the side wall outer surface (11a) of the heel body (10);
Backfilling earth and sand around the main body (10) and compacting;
Installing the upper basket (20) on the basket body (10);
And a step of laying a roadbed and pavement around the main body (10) and the upper main body (20).
-Still another aspect of the present invention is a construction method for installing the U-shaped side groove (6) described above,
Excavating the ground (G) of the installation location and forming a groove of a predetermined size;
Installing the side groove body (60) at the bottom of the groove, and attaching a heat insulating material to the side wall outer surface (61a) of the side groove body (60);
Backfilling the earth and sand around the gutter body (60) and compacting;
Attaching the elongated part (70) near the upper edge of the side wall outer surface (61a) of the gutter body (60);
Laying a roadbed and pavement around the gutter body (60) and the long part (70).

  The drainage basin according to the present invention includes an overhanging support portion in which an upper ridge that is a cylindrical frame forming the uppermost portion of the drainage basin projects outward from the side wall outer surface of the drainage basin body. The part has an inclined upper surface. With this configuration, even when a cavity is formed below the upper ridge, the surrounding structure above the upper ridge is supported by the overhanging support portion of the upper ridge, thereby preventing the surrounding structure from sinking. . As a result, the surface of the surrounding structure and the upper surface of the drainage can be maintained on the same plane, the drainage function of the drainage can be maintained, and safety for pedestrians and vehicles can be ensured.

  In addition, the U-shaped side groove according to the present invention includes an overhanging support portion in which a long part attached in the vicinity of the upper edge of the side wall outer surface projects outward from the outer surface of the side wall, and the overhanging support portion has an inclined upper surface. . With this configuration, even when a cavity is created below the long component, the surrounding structure above the long component is supported by the overhanging support portion of the long component, so that the surrounding structure sinks. Can be prevented. As a result, the surface of the surrounding structure and the upper surface of the U-shaped side groove can be maintained on the same plane, the drainage function of the U-shaped side groove can be maintained, and safety for pedestrians and vehicles can be ensured.

FIG. 1 is a schematic side view of an example of a drain according to the present invention. FIG. 2 is a schematic longitudinal sectional view of each component of the drainage basin of FIG. FIG. 3 is a schematic exploded perspective view of the drainage basin of FIG. FIG. 4 is a cross-sectional view schematically showing the installation state of the drainage basin of FIG. FIG. 5 is a developed perspective view schematically showing a modified example of the drainage basin according to the present invention. FIG. 6 is a diagram for explaining an example of a construction method for installing the drainage basin shown in FIG. 1. FIG. 7 is a schematic perspective view partially showing an example of a U-shaped side groove according to the present invention. 8 is a cross-sectional view schematically showing an installation state of the U-shaped side groove in FIG. FIG. 9 is a view for explaining an example of a construction method for installing the U-shaped side groove 6 shown in FIG. FIG. 10 is a schematic cross-sectional view for explaining the problem of the settlement of the surrounding structure composed of ground, pavement, etc. existing around the drainage basin.

  Hereinafter, with reference to the drawings showing the configuration example of the embodiment of the present invention, the drainage basin and the upper basin according to the present invention, the U-shaped side groove and its long parts, and the construction method using them will be described in detail. explain. In addition, in each drawing, the same or similar code | symbol is attached | subjected about the common or similar component.

(1) Configuration of drainage basin and its upper basin FIG. 1 is a schematic side view of an example of a drainage basin according to the present invention. FIG. 2 is a schematic longitudinal sectional view of each component of the drainage basin of FIG. FIG. 3 is a schematic exploded perspective view of the drainage basin of FIG. FIG. 4 is a cross-sectional view schematically showing the installation state of the drainage basin of FIG.

  The drainage basin 1 is placed as a main component, a container-shaped casket body 10, an upper casket 20 that is a cylindrical frame stacked on the basin body 10, and an upper end of the upper casket 20. And a grating lid 30. The dredging body 10 and the grating lid 30 are basically the same as the dredging body 101 and the grating lid 103 of the known drainage dredge 100 shown in FIG.

  In the example shown in the figure, the container-like bag main body 10 has a substantially rectangular parallelepiped shape as a whole, includes a rectangular bottom wall and four side walls 11, and an upper end is open. On the inner peripheral edge at the upper end of the side wall 11, a concave portion is formed which becomes a receiving portion 11 b for placing the upper flange 20. It is preferable that the concave portion of the receiving portion 11b is composed of a horizontal surface and a fitting surface 11c inclined outward from the outer edge of the horizontal surface.

  The upper flange 20 which is a cylindrical frame is a component unique to the present invention. The upper ridge 20 has a central portion passing therethrough, and the lower end and the upper end are open. The cross-sectional shape of the penetrating part matches the cross-sectional shape of the frame body 10. The cylindrical frame portion is composed of an overhanging support portion 21 and a leg portion 22 below it. The overhanging support portion 21 projects outward over the entire circumference, and the upper surface 21a is inclined so as to become lower toward the outer peripheral edge 21b. The inclination angle α1 of the upper surface 21a is preferably 30 ° to 60 ° with respect to the horizontal direction, but is not limited to this range. Further, the length of the upper surface 21a in the inclination direction is also set as necessary. The lower surface 21c of the overhanging support portion 21 is a horizontal plane in the illustrated example. In this example, the overhanging support portion 21 has a substantially square frustum shape.

  The outer peripheral edge 21b of the overhanging support portion 21 projects over the entire circumference so as to be positioned outside the side wall outer surface 11a of the heel body 10. Therefore, in this example, the length L2 of one side of the upper bag 20 is longer than the length L1 of one side of the bag body 10.

  The leg part 22 is located inside the inner peripheral edge 21d of the lower surface 21c of the overhanging support part 21, and protrudes downward. The outer surface of the leg 22 forms a fitting surface 22a that is inclined inwardly downward. The lower surface of the leg portion 22 is a horizontal plane. The fitting surface 22a of the leg portion 22 of the upper rod 20 and the fitting surface 11c of the receiving portion 11b of the rod main body 10 have the same inclination angle. Therefore, as shown in the cross-sectional view of FIG. 4, when the upper heel 20 is placed on the heel body 10, the leg portion 22 and the receiving portion 11 b are fitted to each other. These fitting surfaces are joined and fixed by a mortar 42.

  Furthermore, a recess serving as a receiving portion 21e for mounting the grating lid 30 is formed on the inner peripheral edge of the upper surface 21a of the overhanging support portion 21. The concave portion of the receiving portion 21e is composed of a horizontal plane and a vertical plane.

  The grating lid 30 is made of a general metal and includes a large number of through holes 32 between the lattices 31. The grating lid 30 may be simply placed or may be appropriately fixed with a bolt or the like as required.

  The main body 10 and the upper main body 20 are made of concrete, and precast concrete products are suitable. As another example, the bag main body 10 can also be produced by on-site mold forming.

  Although not shown in the drawing, one or a plurality of the conventional cylindrical upper ridges 102 shown in FIG. 10 are provided between the frame body 10 and the upper ridges 20 instead of directly stacking the upper ridges 20 on the ridge body 10. It may be interposed. This is performed as necessary by designing the capacity and depth of the drainage basin 1. In that case, the shape of the leg portion and the receiving portion for overlapping the upper and lower members is appropriately designed so as to fit each other.

  Therefore, it is not necessary to arrange the upper gutter 20 in the present invention directly above the container-like gutter body 1 that forms the lowermost part of the drainage gutter 1, and it may be arranged as a member that forms the uppermost part of the drainage gutter 1. .

  Moreover, although not shown in figure, the external shape of the collar main body 10 is not restricted to the substantially rectangular parallelepiped square column, Another polygonal column may be sufficient and a cylinder may be sufficient. In addition, the outer shape of the upper ridge 20 overlaid on the ridge body 10 may be a predetermined substantially polygonal frustum or a substantially truncated cone instead of the substantially square frustum.

  Although not shown, a predetermined opening for connecting one or a plurality of drain pipes may be formed in the side wall 11 of the frame body 10.

  With reference to FIG. 4, the effect of the drainage 1 by this invention is demonstrated. The outer surface 11a of the side wall 11 of the heel body 10 is covered with a board-like heat insulating material 41 having a predetermined thickness. A mortar 42 is joined and fixed between the ridge body 10 and the upper ridge 20. The upper surface of the grating lid 30 is in the same plane as the surface of the pavement P2, which is the uppermost layer of the surrounding structure.

  In the illustrated example, the surrounding structure of the drainage basin 1 is the ground G, the roadbed P1 and the pavement P2 constructed on the ground G, and these are present all around the drainage basin 1. In addition, the surrounding structure of the drainage basin 1 is not restricted to the thing of illustration.

  The ground G, which is the lowermost layer of the surrounding structure, exists up to a predetermined position below the upper end of the main body 10, the roadbed P1 exists from the middle of the frame main body 10 to the upper end of the upper main body 20, and the pavement P2 is It exists from the upper end of the upper ridge 20 to the position of the upper surface of the grating lid 30. The overhanging support portion 21 of the upper ridge 20 overhangs in the layer of the roadbed P1.

  Here, even when the cavity S is generated in the ground G as shown in the figure, the overhanging support portion 21 of the upper ridge 20 supports the roadbed P1 and the pavement P2 existing above this, The settlement of the structure can be prevented. In addition, since the upper surface 11a of the overhanging support portion 11 is provided with a slope that becomes lower toward the outside, the load received from the surrounding structure above is dispersed compared to the case where the overhanging portion is horizontally extended in a cantilever shape, An excessive load is not applied to the overhanging support portion 21. Thereby, the durability of the upper ridge 20 is improved.

  FIG. 5 is a developed perspective view schematically showing a modified example of the drainage basin according to the present invention. A drainage basin 1A shown in FIG. 5 has a configuration for connecting to a side groove. A notch 13 having a predetermined length and width is formed from one upper end on one of the side walls of the bag main body 10A. Further, a notch portion 23 having a predetermined width is formed in the central portion of one side of the cylindrical frame body of the upper collar 20A. The widths of the notch 13 and the notch 23 match the width of the side groove to be connected, and the sum of the lengths of the notch 23 and the notch 13 matches the height of the side groove to be connected. Yes. About the structure of the other part of the dredging main body 10A and the upper dredging 20A, and the structure of the grating lid 30, it is the same as that of the drainage dredge 1 shown in FIG. In the case of having a notch in a part as in the upper flange 20A of this example, in the sense that the overhanging support portion 21 projects outward over the entire circumference, the part other than the notch Is considered.

(2) Construction method of drainage basin With reference to FIG. 6, an example of a construction method for installing the drainage basin 1 shown in FIG. 1 will be described.
First, as shown to Fig.6 (a), the ground G of the installation location of the drain 1 is excavated, and the hole of a predetermined | prescribed magnitude | size is formed. In this example, since the pavement is performed on the upper layer, the upper surface of the ground G is set to a position that becomes the lowermost surface of the planned pavement. Based on the thickness of the pavement and the height of the drainage basin 1, the depth of the hole is set so that the upper surface of the drainage basin 1 matches the final surface of the pavement. In addition, the size of the horizontal cross section of the hole is set in consideration of the thickness of the heat insulating material 41 attached around the main body 10 and a predetermined work space.

  After excavating the hole, the main body 10 is installed. Although not shown, a foundation for reinforcement may be constructed immediately below the heel body 10.

Next, as shown in FIG. 6 (b), a heat insulating material 41 is attached to the outer surface of the side wall of the bag main body 10.
Next, as shown in FIG.6 (c), the excavated earth and sand are refilled in the space around the main body 10, and compaction is performed using a rolling roller or the like.

  Thereafter, as shown in FIG. 6 (d), first, the lower layer of the roadbed P <b> 1 is laid, pressed and compacted, and then the upper rod 20 is installed on the rod body 10. The heel body 10 and the upper heel 20 are joined and fixed by a mortar 42.

  Subsequently, as shown in FIG. 6 (e), the upper layer of the roadbed P1 is laid and compacted by rolling. In FIG. 6E, the lower layer and the upper layer of the roadbed P1 are not distinguished, but for example, an appropriate roadbed material may be selected and used for each layer. In FIG. 6 (e), the grating lid 30 is installed at this stage, but the grating lid 30 may be installed at the same time as the upper ridge 20 or at any stage thereafter.

  Finally, as shown in FIG. 6 (f), the pavement P2 is laid and compacted by rolling. Although not shown, the pavement P2 may also have a two-layer structure composed of a base layer and a surface layer asphalt mixture. The surface of the pavement P2 coincides with the upper surface of the grating lid 30.

  The construction method shown in FIG. 6 is an example, and various construction methods are possible depending on the purpose and installation location of the drainage 1.

(3) Configuration of U-shaped side groove and long part thereof FIG. 7 is a schematic perspective view partially showing an example of the U-shaped side groove according to the present invention. 8 is a cross-sectional view schematically showing an installation state of the U-shaped side groove in FIG.

  The U-shaped side groove 6 includes, as main components, a side groove main body 60 having a substantially U-shaped cross section, a long part 70, and a grating lid 30 placed on the upper end of the side groove main body 60. The side groove main body 60 includes a bottom wall and a pair of side walls 61 rising from both sides thereof. A concave portion serving as a receiving portion 62 for placing the grating lid 30 is formed at the upper end of each side wall 61. The recessed part of the receiving part 62 is comprised from the horizontal surface and the vertical surface. The side groove main body 60 and the grating lid 30 are the same as known ones, and there are various modified forms other than the illustrated form, but the present invention can be applied to other known forms.

  The long part 70 is a component unique to the present invention. The long component 70 is attached in the vicinity of the upper edge of the side wall outer surface 61a of the gutter body 60 in parallel with the upper edge. The long component 70 is an angle component having a shape obtained by bending a belt-shaped plate member with one bending line extending in the longitudinal direction and having a substantially L-shaped cross section. However, the L-shaped angle α2 having a substantially L-shaped cross section is an obtuse angle. One side of the bend line is an attachment portion 72 having a predetermined width for attachment to the side wall outer surface 61a, and the other side is an overhanging support portion 71 having a predetermined width.

  The attachment portion 72 is formed with holes through which the anchor bolts 73 are penetrated at appropriate intervals in the longitudinal direction. On the other hand, a hole 64 for embedding the anchor bolt 73 is formed in the vicinity of the upper edge of the side wall outer surface 61a of the side groove main body 60, and the anchor bolt 73 is embedded. The head of the embedded anchor bolt 73 passes through the hole of the mounting portion 72 and is fastened and fixed by a nut 74. When the attachment portion 72 is attached to the side wall outer surface 61a which is a vertical surface, the overhanging support portion 71 is inclined so as to become lower toward the outer edge 71a.

  The angle α2 formed by the overhanging support portion 71 and the attachment portion 72 is an obtuse angle, and a range of 120 ° to 150 ° is suitable, but is not limited to this range. Further, the width of the overhanging support portion 71 is appropriately set as necessary. The long component 70 is preferably made of metal, but may be made of reinforced plastic such as engineering plastic.

  The effect of the U-shaped side groove 6 according to the present invention will be described with reference to FIG. A grating lid 30 is placed on the upper end opening of the side groove main body 60. The upper surface of the grating lid 30 is in the same plane as the surface of the pavement P2, which is the uppermost layer of the surrounding structure.

  The surrounding structure of the U-shaped side groove 6 is the ground G, the roadbed P1 and the pavement P2 constructed on the ground G, as in the example of the drainage tub 1 described above, and exists on both sides of the U-shaped side groove 6. The surrounding structure of the U-shaped side groove 6 is not limited to the illustrated one.

  The ground G, which is the lowest layer of the surrounding structure, exists up to a predetermined position below the upper end of the gutter body 60, and the roadbed P1 exists up to a position near the boundary between the overhanging support portion 71 and the attachment portion 72 of the long component 70. The pavement P2 exists up to the position of the upper surface of the grating lid 30. The overhang support portion 71 of the long component 70 projects into the layer of the roadbed P1.

  Here, even when the cavity S is generated in the ground G as shown in the figure, the overhanging support portion 71 of the long component 70 supports the roadbed P1 and the pavement P2 existing above this, The settlement of surrounding structures can be prevented. In addition, since the upper surface of the overhanging support portion 71 is an inclined surface that becomes lower toward the outside, the load received from the upper surrounding structure is dispersed as compared with the case where the overhanging support portion is horizontally extended in a cantilever shape, The part 71 is not overloaded. Thereby, the durability of the long component 70 is improved.

(4) U-shaped side groove construction method An example of a construction method for installing the U-shaped side groove 6 shown in FIG. 7 will be described with reference to FIG.
First, as shown in FIG. 9A, the ground G where the U-shaped side groove 6 is installed is excavated to form a groove having a predetermined size. In this example, since the pavement is performed on the upper layer, the upper surface of the ground G is set to a position that becomes the lowermost surface of the planned pavement. Based on the thickness of the pavement and the height of the U-shaped side groove 6, the depth of the groove is set so that the upper surface of the U-shaped side groove 6 coincides with the final surface of the pavement. The width of the groove is set in consideration of the thickness of the heat insulating material 41 attached around the U-shaped side groove 6 and a predetermined work space.

  After excavating the groove, the U-shaped side groove 6 is installed. Although not shown, a foundation for reinforcement may be constructed immediately below the U-shaped side groove 6. An anchor bolt embedding hole 64 may be formed in advance near the upper edge of the outer surface of the side wall of the U-shaped side groove 6.

Next, as shown in FIG. 9B, a heat insulating material 41 is attached to the outer surface of the side wall of the U-shaped side groove 6.
Next, as shown in FIG. 9C, the excavated earth and sand are backfilled in the space around the U-shaped side groove 6 and compacted using a rolling roller or the like.

  Thereafter, as shown in FIG. 9 (d), first, the lower layer of the roadbed P1 is laid, compacted by rolling, and then the long component 70 is attached to the U-shaped side groove 6 using anchor bolts 73 and nuts 74. .

  Then, as shown in FIG.9 (e), the upper layer of the roadbed P1 is laid, and it compacts by rolling. In FIG. 9 (e), the lower layer and the upper layer of the roadbed P1 are not distinguished, but for example, an appropriate roadbed material may be selected and used for each layer. In FIG. 9E, the grating lid 30 is installed at this stage, but the grating lid 30 may be installed at any stage.

  Finally, as shown in FIG. 9 (f), the pavement P2 is laid and compacted by rolling. Although not shown, the pavement P2 may also have a two-layer structure composed of a base layer and a surface layer asphalt mixture. The surface of the pavement P2 coincides with the upper surface of the grating lid 30.

  The construction method shown in FIG. 9 is an example, and various construction methods are possible according to the purpose and installation location of the U-shaped side groove 6.

(5) Others The drainage slag according to the present invention and the upper slag as one member thereof, the U-shaped side groove and the long part as one part thereof, and the construction method using these show the principle of the present invention. These modifications are also included in the scope of the present invention as long as they are examples and include the principle of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A, 100 Drainage basin 10, 10A basin body 11 Side wall 11a Side wall outer surface 11b Receiving part 11c Fitting surface 13 Notch part for side groove 20, 20A Upper part 21 Overhanging support part 21a Upper surface 21b Upper surface outer periphery 21c Lower surface 21d Lower surface Inner peripheral edge 21e Receiving part 22 Leg part 22a Fitting surface 23 Side groove notch 30 Grating lid 31 Hole 32 Grid 41 Heat insulating material 42 Mortar 6 U-shaped side groove 60 Side groove body 61 Side wall 61a Side wall outer surface 62 Receiving part 64 Embedded hole 70 Long Scale part 71 Overhang support part 71a Outer edge 72 Mounting part 73 Anchor bolt 74 Nut G Ground P1 Roadbed P2 Pavement S Cavity

In order to achieve the above object, the present invention provides the following configurations. The numbers in parentheses are reference numerals in the drawings to be described later and are attached for reference.
One aspect of the present invention includes a container-like ridge body (10) and a cylindrical upper ridge (20) that is a member that is stacked on the ridge body (10) to form the uppermost portion. A drainage basin (1),
The upper flange (20) has an overhanging support portion (21) projecting outward over the entire circumference thereof,
The upper surface (21a) of the overhanging support portion (21) is inclined so as to become lower toward the outer peripheral edge (21b), and the lower surface (21c) is horizontal, and the outer peripheral edge (21b) is the entire circumference. Is located outside the side wall outer surface (11a) of the heel body (10) ,
The upper ridge (20) is further formed on the inner periphery of the upper surface (21a) of the overhang support portion (21), and a receiving portion (21e) for the grating lid (30), and the overhang support portion And a leg portion (22) protruding downward from the lower surface (21c) of (21) .
-Another aspect of the present invention is a cylindrical upper trough (20) that is a member forming the uppermost portion of the drain trough (1),
An overhanging support portion (21) that protrudes outward over the entire circumference, inclines so that its upper surface (21a) becomes lower toward the outer peripheral edge (21b), and its lower surface (21c) is horizontal,
A receiving portion (21e) for the grating lid (30) formed on the inner peripheral edge of the upper surface (21a) of the overhanging support portion (21);
And a leg portion (22) protruding downward from the lower surface (21c) of the overhanging support portion (21).
-Yet another aspect of the present invention is a U-shaped side groove (6),
In order to prevent the surrounding structure of the U-shaped side groove (6) from sinking, a long part (70) attached in parallel to the upper edge is provided near the upper edge of the side wall outer surface (61a) of the side groove body (60). And
The long part (70) is bent at an obtuse angle (α2) at one bending line extending in the longitudinal direction, and one side of the bending line is attached to the outer side wall (61a). A plate-like mounting portion (72) having a predetermined width that is possible , and the other side is a plate-like shape having a predetermined width protruding outward from the lower edge of the mounting portion (72) to support the surrounding structure The overhanging support portion (71) is characterized in that the overhanging support portion (71) is inclined so as to become lower toward the outer edge (71a).
- Yet another aspect of the present invention, for the sinking prevention of surrounding structures of the U-shaped gutter (6), gutter body (60) a plate-like elongate products to be attached to the side wall outer surface (61 a) (70) Because
One bending line extending in the longitudinal direction is bent at an obtuse angle (α2), and one side of the bending line has a predetermined width that can be attached to the outer side wall (61a). (72), and the other side is an overhanging support portion (71) having a predetermined width to support the surrounding structure.
-Yet another aspect of the present invention is a construction method for installing the drainage basin (1) described above,
Excavating the ground (G) of the installation location and forming a hole of a predetermined size;
Installing the heel body (10) at the bottom of the hole, and attaching a heat insulating material to the side wall outer surface (11a) of the heel body (10);
Backfilling earth and sand around the main body (10) and compacting;
Installing the upper basket (20) on the basket body (10);
And a step of laying a roadbed and pavement around the main body (10) and the upper main body (20).
-Still another aspect of the present invention is a construction method for installing the U-shaped side groove (6) described above,
Excavating the ground (G) of the installation location and forming a groove of a predetermined size;
Installing the side groove body (60) at the bottom of the groove, and attaching a heat insulating material to the side wall outer surface (61a) of the side groove body (60);
Backfilling the earth and sand around the gutter body (60) and compacting;
Attaching the elongated part (70) near the upper edge of the side wall outer surface (61a) of the gutter body (60);
Laying a roadbed and pavement around the gutter body (60) and the long part (70).

Claims (6)

A drainage basin (1) comprising a container-shaped casket body (10) and a cylindrical upper casket (20) stacked on the casket body (10),
The upper flange (20) has an overhanging support portion (21) projecting outward over the entire circumference thereof,
The upper surface (21a) of the overhanging support portion (21) is inclined so as to become lower toward the outer peripheral edge (21b), and the outer peripheral edge (21b) extends over the entire periphery of the heel body (10 A drainage basin characterized by being located outside the outer surface (11a) of the side wall. A cylindrical upper tub (20) that is a member that forms the uppermost portion of the drainage basin (1),
An overhanging support portion (21) that protrudes outward over the entire circumference, inclines so that its upper surface (21a) becomes lower toward the outer peripheral edge (21b), and its lower surface (21c) is horizontal,
A receiving portion (21e) for the grating lid (30) formed on the inner peripheral edge of the upper surface (21a) of the overhanging support portion (21);
An upper ridge having a leg portion (22) protruding downward from a lower surface (21c) of the overhanging support portion (21). U-shaped side groove (6),
In the vicinity of the upper edge of the side wall outer surface (61a) of the side groove body (60), there is a long part (70) attached in parallel to the upper edge,
The long component (70) includes a plate-like attachment portion (72) that can be attached to the outer surface (61a) of the side wall, and a plate-like extension support portion that protrudes outward from the lower edge of the attachment portion (72). (71), and the overhanging support portion (71) is inclined so as to become lower toward the outer edge (71a). A plate-like long component (70) attached to the side wall outer surface (61b) of the side groove body (60) in order to prevent the surrounding structure of the U-shaped side groove (6) from sinking,
One bent line extending in the longitudinal direction is bent at an obtuse angle (α2), and one side of the bent line has a predetermined width that can be attached to the side wall outer surface (61a). (72), and the other side is an overhanging support portion (71) having a predetermined width to support the surrounding structure. A construction method for installing the drainage basin (1) according to claim 1,
Excavating the ground (G) of the installation location and forming a hole of a predetermined size;
Installing the heel body (10) at the bottom of the hole, and attaching a heat insulating material to the side wall outer surface (11a) of the heel body (10);
Backfilling earth and sand around the main body (10) and compacting;
Installing the upper basket (20) on the basket body (10);
And a step of laying a roadbed and pavement around the main body (10) and the upper main body (20). A construction method for installing the U-shaped side groove (6) according to claim 3,
Excavating the ground (G) of the installation location and forming a groove of a predetermined size;
Installing the side groove body (60) at the bottom of the groove, and attaching a heat insulating material to the side wall outer surface (61a) of the side groove body (60);
Backfilling the earth and sand around the gutter body (60) and compacting;
Attaching the elongated part (70) near the upper edge of the side wall outer surface (61a) of the gutter body (60);
A method of constructing a U-shaped side groove (6), comprising at least a step of laying a roadbed and a pavement around the side groove body (60) and the long part (70).

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