Water collection basin body

Abstract

To provide a catch basin body made of precast concrete that can prevent damage to the lower part of the peripheral wall (side wall) while improving workability when forming a channel opening in the peripheral wall.SOLUTION: A catch basin body 10 comprises a polygonal cylindrical peripheral wall 20, an upper opening 21 formed at the top of the peripheral wall 20, a lid holder protrusion 22 formed inside the upper opening 21 and on which a lid can be placed, a thick reinforcing part 23 formed at the inner corner of the peripheral wall 20, side walls 24 and 25 formed on at least two sides of the peripheral wall 20, which are thinner than the thick reinforcing part 23 and capable of forming waterway openings with a cutting tool, and a metal reinforcing member 40 disposed within a bottom part 26 of the peripheral wall 20 and around the entire circumference of the bottom part 26.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a catch basin body made of precast concrete.

Background Art

[0002] Conventionally, in water channels for rainwater, service water, drainage, etc., at the confluence points of multiple water channels, at locations where the route or drainage gradient of the water channel is changed, and also in the middle of the water channel for the purpose of separating and removing foreign substances such as mud and garbage mixed in the water flowing through the water channel, catch basins are installed. Generally, such catch basins are those in which an opening for connecting to a water channel is formed in the peripheral wall portion (side wall portion) of a concrete basin body having a polygonal cylindrical peripheral wall portion, and the upper opening portion of the basin body can be covered with a removable lid. In recent years, there has been a demand for reducing the workload at the site (improving workability) due to a shortage of skilled workers, etc. Even in catch basins, there is a strong demand for a shift from the in-situ casting method or the on-site casting method (a method of installing a formwork at the construction site and casting concrete to make it) to the precast method (a method of manufacturing concrete products in a dedicated factory in advance and then transporting them to the site for installation). Therefore, the applicant of the present application has proposed a precast concrete basin in Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-230197). In a catch basin made of precast concrete, a water channel opening for connecting a water channel to the basin body of the catch basin can be formed in advance in the basin body, but depending on the shape, size, position, etc. of the connected water channel, it is also effective to form it appropriately by post-processing (cutting with a cutting tool (such as a diamond cutter)). For example, Patent Document 2 (Japanese Patent Application Laid-Open No. 10-237937) discloses forming a recess on the inner surface of the catch basin (basin body) in order to simplify the formation work of such a water channel opening.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] The inventors have found that when a channel opening is formed in the peripheral wall of the catch basin body by post-processing, there is a problem with strength, particularly with the lower part of the peripheral wall (from the part where the channel opening is formed to the bottom surface of the peripheral wall) being damaged. In other words, cracks caused by the cutting (cuts) during the formation of the channel opening may reach the lower end (bottom surface) of the peripheral wall, or the peripheral wall may be damaged during transportation before and after the formation of the channel opening, or while the catch basin body is being placed in its installation location. Therefore, the object of the present invention is to provide a catch basin body made of precast concrete that improves workability when forming a channel opening in the peripheral wall and, in particular, prevents damage to the lower part of the peripheral wall (side wall). [Means for solving the problem]

[0005] The following will achieve the above objectives: (1) A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall, an upper opening formed on the upper part of the peripheral wall, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thickened portion formed at the inner corner of the peripheral wall, side wall portions formed on at least two surfaces of the peripheral wall, which are thinner than the reinforcing thickened portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within and around the entire circumference of the bottom surface of the peripheral wall. 、 The reinforcing member comprises an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, and the bottom surface of the annular bottom plate portion is exposed at the bottom surface of the peripheral wall portion. The main body of the water collection basin.

[0006] Furthermore, the following items will achieve the above objectives. ( 2 ) A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The reinforcing member comprises an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, wherein the vertical plate portion of the reinforcing member extends in the vertical direction of the peripheral wall portion in the vertical cross-section of the peripheral wall portion, and the annular bottom plate portion extends in the horizontal direction of the peripheral wall portion in the vertical cross-section of the peripheral wall portion. ( 3 ) A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The reinforcing member comprises a catch basin body having an annular angle member having an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, and a rod-shaped reinforcing bar member fixed to the upper part of the vertical plate portion of the annular angle member. ( 4 ) The bottom surface of the annular bottom plate portion is substantially flush with the bottom surface of the peripheral wall portion as described above (1) to ( 3 The main body of the water collection basin as described in any of the following. ( 5 ) A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The periphery portion is rectangular and cylindrical, and the water collection basin body comprises a first set of side wall portions facing each other in the cross-section of the periphery portion, and a second set of side wall portions facing each other in the cross-section of the periphery portion and perpendicular to the first set of side wall portions. The reinforcing member comprises an annular base plate portion, an annular angle member having a first pair of vertical plate portions extending upward from the annular base plate portion and facing each other, and a second pair of vertical plate portions perpendicular to and facing the first pair of vertical plate portions, two rod-shaped lower reinforcing members suspended and fixed on both sides of the first pair of vertical plate portions or the second pair of vertical plate portions of the annular angle member, and two rod-shaped upper reinforcing members suspended and fixed on both sides of the two lower reinforcing members, and, The bottom surface of the annular bottom plate portion is the main body of the water collection basin that is exposed at the bottom surface of the peripheral wall portion. [Effects of the Invention]

[0007] Since the side wall portion of the rainwater collecting trough body of the present invention is thinner than the reinforcing thick portion, the workability when forming the water channel opening with respect to the peripheral wall portion (side wall portion) is improved. Further, in the rainwater collecting trough body, although no thick portion (reinforcing portion) such as a lid receiving protrusion or a reinforcing thick portion is formed on the bottom surface portion of the peripheral wall portion, the bottom surface portion of the peripheral wall portion is reinforced by the reinforcing member disposed over the entire circumference within the bottom surface portion, so that breakage of the lower portion of the peripheral wall portion (side wall portion) can be prevented.

Brief Description of the Drawings

[0008] [Figure 1] FIG. 1 is a front view showing the rainwater collecting trough body of an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view showing the rainwater collecting trough body of an embodiment of the present invention. [Figure 3] FIG. 3 is a bottom view showing the rainwater collecting trough body of an embodiment of the present invention. [Figure 4] FIG. 4 is a sectional view taken along line A-A in FIG. 1. [Figure 5] FIG. 5 is a sectional view taken along line B-B in FIG. 2. [Figure 6] FIG. 6 is a partially enlarged explanatory view of the bottom portion of the rainwater collecting trough body shown in FIG. 5. [Figure 7] FIG. 7 is a plan view showing the reinforcing member disposed on the rainwater collecting trough body shown in FIG. 1. [Figure 8] FIG. 8 is a partially enlarged explanatory view of the cross section taken along line C-C in FIG. 7. [Figure 9] FIG. 9 is a front view showing the state in which a water channel opening is formed in the rainwater collecting trough body shown in FIG. 1. [Figure 10] FIG. 10 is a sectional view showing the installation state of the rainwater collecting trough body shown in FIG. 9. <​​​​​​​​ [Figure 14] Figure 14 is a partially enlarged explanatory diagram of the vertical cross-section of the bottom of a catch basin body according to another embodiment of the present invention. [Figure 15] Figure 15 is a central longitudinal cross-sectional view of the main body of a catch basin according to another embodiment of the present invention. [Figure 16] Figure 16 is a magnified explanatory diagram of the bottom portion of the catch basin body shown in Figure 15. [Modes for carrying out the invention]

[0009] The present invention will be described using the embodiment shown in the drawings. In this embodiment, the vertical direction in Figure 1 is described as the vertical, longitudinal, or axial direction of the catch basin body (peripheral wall portion), and the left-right direction in Figure 1 is described as the left-right, lateral, or width direction of the catch basin body (peripheral wall portion). However, this does not necessarily define the manner in which the catch basin body is manufactured or used.

[0010] The present invention provides a water catch basin body 10 made of precast concrete, comprising a polygonal cylindrical peripheral wall portion 20, an upper opening 21 formed on the upper part of the peripheral wall portion 20, a lid receiving projection 22 formed inside the upper opening 21 on which a lid can be placed, a reinforcing thickened portion 23 formed at the inner corner of the peripheral wall portion 20, side wall portions 24, 25 formed on at least two surfaces of the peripheral wall portion 20, which are thinner than the reinforcing thickened portion 23 and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member 40 disposed within the bottom surface portion 26 of the peripheral wall portion 20 and around the entire circumference of the bottom surface portion 26.

[0011] In this embodiment, the catch basin body 10 has a rectangular cylindrical peripheral wall 20, and the catch basin body 10 comprises a first pair of side wall portions 24, 24 that face each other in the cross-section of the peripheral wall portion 20, and a second pair of side wall portions 25, 25 that face each other in the cross-section of the peripheral wall portion 20 and are perpendicular to the first pair of side wall portions 24, 24. The reinforcing member 40 comprises an annular bottom plate portion 41, an annular angle member 44 having a first pair of opposing vertical plate portions 42, 42 extending upward from the annular bottom plate portion 41 and a second pair of opposing vertical plate portions 43, 43 perpendicular to the first pair of vertical plate portions 42, 42, and two rod-shaped lower reinforcing members 45 suspended and fixed on both sides of the first pair of vertical plate portions 42, 42 or the second pair of vertical plate portions 43, 43 (here, the first pair of vertical plate portions 42, 42) of the annular angle member 44, and two rod-shaped upper reinforcing members 46 suspended and fixed on both sides of the two lower reinforcing members 45. The bottom surface 47 of the annular bottom plate portion 41 is exposed on the bottom surface 27 of the peripheral wall portion 20.

[0012] In this embodiment, as shown in Figures 1 to 5, the peripheral wall portion 20 of the catch basin body 10 is rectangular in shape. The peripheral wall portion 20 has an upper opening 21 at the top and a lower opening 28 at the bottom. In other words, the peripheral wall portion 20 is open at the top and bottom.

[0013] A lid-receiving projection 22 is formed on the inside of the upper opening 21 of the peripheral wall portion 20, on which a lid can be placed. Specifically, as shown in Figures 2 and 5, the lid-receiving projection 22 protrudes inward (towards the center) from the inner surface of the upper opening 21 along the entire circumference of the peripheral wall portion 20. The upper surface of the lid-receiving projection 22 is a substantially horizontal surface (annular horizontal surface 29). The lower surface of the lid-receiving projection 22 is an inclined surface (annular inclined surface 30) that slopes toward the peripheral wall portion 20 (side wall portions 24, 25 described later). The lid-receiving projection 22 is thick at the base end that contacts the peripheral wall portion 20, becomes thinner toward the tip (inward), and extends with almost the same thickness at the tip. Therefore, the lid-receiving projection 22 can withstand the weight of the lid on which it is placed.

[0014] The polygonal cylindrical peripheral wall portion 20 having the aforementioned lid-receiving projection 22 is made of precast concrete. Precast concrete refers to a concrete member having a polygonal cylindrical peripheral wall portion with the aforementioned lid-receiving projection, which is manufactured in a factory, rather than being made using the on-site casting method (conventional method) where formwork is set up and concrete is poured on-site. Precast concrete products have the advantages of being more stable and requiring less on-site work time compared to products made using the on-site casting method (conventional method).

[0015] As the lid to be placed on the lid receiving projection 22, a mesh-like steel lid called a grating can be used, although this is not shown in the figure. It is preferable that such a lid allows for selection of the mesh size and the structure and presence or absence of a handle for removal (the lid receiving projection 22 and the lid receiving projection 22 described later should be configured to accommodate various types of lids).

[0016] In this embodiment, a metal lid receiving member 31 is attached to the lid receiving projection 22 of the catch basin body 10. Specifically, as shown in Figures 2 and 5, the lid receiving member 31 is an annular angle member formed to follow the upper surface (annular horizontal plane 29) of the lid receiving projection 22 and the inner surface of the upper opening 21, along the entire circumference of the peripheral wall portion 20. The lid receiving member 31 is fixed to the upper surface (annular horizontal plane 29) of the lid receiving projection 22 by bolts or the like. In the catch basin body 10 of this embodiment, the attachment of the metal lid receiving member 31 to the lid receiving projection 22 reinforces the upper part of the peripheral wall portion 20 (the upper part of the side wall portions 24 and 25, which will be described later). In addition, the lid receiving member 31 makes it easier to attach and remove the lid from the catch basin body 10.

[0017] As shown in Figures 3 and 4, reinforcing thickened sections 23 are formed at the inner corners of the peripheral wall 20 of the catch basin body 10. Specifically, as shown in Figures 3 and 4, the reinforcing thickened sections 23 are formed to fill the inside of the corners 32 of the rectangular cylindrical peripheral wall 20, which are formed at approximately right angles in the cross-section of the peripheral wall 20, and are formed to connect the inner surfaces of the peripheral wall 20 at an angle. As a result, the peripheral wall 20 having the reinforcing thickened sections 23 has an outer shape that is approximately square in cross-section, and an inner shape that is approximately square with each corner (four corners) chamfered. The reinforcing thickened sections 23 are formed at the corners 32 (inner corners) of the peripheral wall 20, extending from the lower surface (annular inclined surface 30) of the lid receiving projection 22 to the lower end (bottom surface 27) of the peripheral wall 20. The reinforcing thickened sections 23 are thicker than the side wall sections 24 and 25, which will be described later. The reinforcing thickened section 23 reinforces the corners 32 of the peripheral wall section 20 (the sides of the side walls 24 and 25). This also prevents stress concentration at the corners 32 of the peripheral wall section 20 (especially the inner corners), thereby preventing damage to the peripheral wall section 20 (the main body of the water catch basin 10).

[0018] In this embodiment, as shown in Figure 5, no members other than the reinforcing members 40 described later are provided at the corners 32 of the peripheral wall 20 (including the reinforcing thickened portion 23) along the entire vertical length of the catch basin body 10 (peripheral wall portion 20). In the catch basin body 10, the corners 32 of the peripheral wall portion 20 (the sides of the side wall portions 24 and 25) are reinforced by the reinforcing thickened portion 23, so the strength of the corners 32 is ensured without providing any members other than the reinforcing members 40.

[0019] At least two surfaces of the peripheral wall portion 20 of the catch basin body 10 have side wall portions 24 and 25 that are thinner than the reinforcing thickness portion 23 and into which a water channel opening can be formed using a cutting tool such as a diamond cutter. In this embodiment, all four surfaces of the rectangular tubular peripheral wall portion 20 are side wall portions 24 and 25 into which a water channel opening can be formed using a cutting tool.

[0020] More specifically, as shown in Figure 4, the catch basin body 10 comprises a first set of side wall portions 24, 24 that face each other in the cross-section of the peripheral wall portion 20 (extending in the left-right direction in Figure 4), and a second set of side wall portions 25, 25 that face each other in the cross-section of the peripheral wall portion 20 and are perpendicular to the first set of side wall portions 24, 24 (extending in the up-down direction in Figure 4). In this embodiment, all side wall portions (the first set of side wall portions 24, 24 and the second set of side wall portions 25, 25) are substantially uniform overall and each has substantially the same thickness. The thickness (t1) of the side wall portions 24, 25 is preferably 50 to 70 mm, and particularly preferably about 55 to 65 mm.

[0021] Furthermore, in this embodiment, as shown in Figures 1 and 4, boundary recesses 33 are formed on the outer surfaces of the side wall portions 24 and 25. The boundary recesses 33 are formed at the boundary between the side wall portions 24 and 25 and the reinforcing thickened portion 23 and the lid receiving protrusion 22. This allows the worker to easily confirm from the outside the position (range) of the side wall portions 24 and 25 in which the water channel opening should be formed using a cutting tool on the catch basin body 10. In addition, since the portion of the side wall portions 24 and 25 in which the boundary recess 33 is formed is thin and easily damaged, it is possible to prevent damage (cracks) caused by the formation of the water channel opening from reaching the upper part (lid receiving protrusion 22) or corners (reinforcing thickened portion 23) of the peripheral wall portion 20.

[0022] In this embodiment, boundary recesses 33 are formed on all side wall portions 24, 25 (the entire surface of the peripheral wall portion 20). While it is not necessary for such boundary recesses to be provided on the entire surface of the peripheral wall portion of the catch basin body, it is preferable that they be provided on all side wall portions on the peripheral wall portion where a channel opening can be formed.

[0023] A metal reinforcing member 40 is provided within the bottom surface 26 of the peripheral wall 20 of the main body of the water collection basin 10, extending around the entire circumference of the bottom surface 26. Here, the reinforcing member 40 of this embodiment will be specifically described with reference to Figures 7 and 8.

[0024] As shown in Figures 7 and 8, the reinforcing member 40 comprises an annular angle member 44 having an annular bottom plate portion 41 and vertical plate portions 42 and 43 extending upward from the annular bottom plate portion 41, and rod-shaped reinforcing members 45 and 46 fixed to the upper parts of the vertical plate portions 42 and 43 of the annular angle member 44.

[0025] In this embodiment, as shown in Figure 7, the annular angle member 44 of the reinforcing member 40 has a substantially square ring shape in plan view, and has an annular bottom plate portion 41, a first pair of vertical plate portions 42, 42 that extend upward from the annular bottom plate portion 41 and face each other (extending in the left-right direction in Figure 7), and a second pair of vertical plate portions 43, 43 that are perpendicular to and face each other (extending in the up-down direction in Figure 7) the first pair of vertical plate portions 42, 42.

[0026] Furthermore, as shown in Figures 7 and 8, the annular angle member 44 of this embodiment has vertical plate portions 42 and 43 extending substantially vertically upward from the outer edge of the annular base plate portion 41, and in the vertical cross-section (cross-section shown in Figure 8), it has a substantially L-shaped cross-section around its entire circumference. In this embodiment, the width dimension (W) of the annular base plate portion 41 and the vertical dimension (H) of the vertical plate portions 42 and 43 in the vertical cross-section are substantially the same, and the thickness (t2) of the annular base plate portion 41 and the thickness (t3) of the vertical plate portions 42 and 43 are substantially the same.

[0027] The width (W) of the annular base plate portion 41 and the height (H) of the vertical plate portions 42 and 43 are preferably 20 to 40 mm, and particularly preferably 25 to 35 mm. The width (W) of the annular base plate portion 41 and the height (H) of the vertical plate portions 42 and 43 can also be defined in relation to the thickness (t1) of the side wall portions 24 and 25 described above, and are preferably 1 / 2 or more of t1. Furthermore, the thickness (t2) of the annular base plate portion 41 and the thickness (t3) of the vertical plate portions 42 and 43 are preferably 2 to 4 mm, and particularly preferably about 3 mm.

[0028] The annular angle member 44 described above can be formed, for example, by appropriately cutting out L-shaped steel material (angle steel material) with an L-shaped cross-section integrally formed, equal-sided L-shaped steel material (equal-sided angle steel material), and L-shaped angle steel material having a bottom plate portion and a vertical plate portion fixed (welded) to the edge of the bottom plate portion, and connecting (welding) them together. The annular angle member 44 is made of metal, and is particularly preferably made of iron or steel (made mainly of iron). In addition, the surface of the annular angle member 44 may be painted to prevent rust or for other purposes.

[0029] In this embodiment, as shown in Figures 7 and 8, the reinforcing member 40 comprises, as reinforcing members, two rod-shaped lower reinforcing members 45, 45 suspended and fixed on both sides of the first set of vertical plate portions 42, 42 or the second set of vertical plate portions 43, 43 (in this embodiment, the first set of vertical plate portions 42, 42) of the annular angle member 44, and two rod-shaped upper reinforcing members 46, 46 suspended and fixed on both sides of the two lower reinforcing members 45, 45.

[0030] Here, as shown in Figure 7, it is preferable that the lower reinforcing bar member 45 protrudes outward in its axial direction (extension direction, which is the vertical direction in Figure 7) beyond the vertical plate portion 42 of the first set of annular angle members 44. Also, as shown in Figure 7, it is preferable that the upper reinforcing bar member 46 protrudes outward in its axial direction (extension direction, which is the left-right direction in Figure 7) beyond the vertical plate portion 43 of the second set of annular angle members 44.

[0031] The reinforcing bar members 45 and 46 are made of metal, and are preferably made of iron or steel (primarily iron). Although not shown in the figures, it is also preferable that the reinforcing bar members 45 and 46 are deformed reinforcing bars with multiple transverse joints (bamboo joints, ribs) formed along their entire length. The ends of the reinforcing bar members 45 and 46 may also be bent, or the reinforcing bar members 45 and 46 may be formed in a corrugated shape along their entire length. The diameter of the reinforcing bar members 45 and 46 is preferably 10 to 20 mm, and is particularly preferably about 10 mm.

[0032] Here, as schematically shown in Figure 8, it is preferable that the first set of vertical plate portions 42 and the lower reinforcing bar member 45 are fixed together, and the lower reinforcing bar member 45 and the upper reinforcing bar member 46 are fixed together by welding (indicated schematically as a welded portion 48 in Figure 8). This allows the reinforcing effect of the reinforcing member 40, which comprises an annular angle member 44 and reinforcing bar members (lower reinforcing bar member 45 and upper reinforcing bar member 46), on the bottom surface portion 26 of the peripheral wall portion 20 to be more effectively exerted.

[0033] In the main body of the water collection basin 10, the reinforcing member 40 described above is provided within the bottom surface 26 of the peripheral wall 20 and around the entire circumference of the bottom surface 26.

[0034] As shown in Figures 1 to 5, the reinforcing member 40 comprises an annular bottom plate portion 41 and vertical plate portions 42 and 43 extending upward from the annular bottom plate portion 41. When the reinforcing member 40 is installed within the bottom surface of the peripheral wall portion 20, the bottom surface 47 of the annular bottom plate portion 41 is exposed on the bottom surface 47 of the peripheral wall portion 20. Furthermore, the bottom surface 47 of the annular bottom plate portion 41 is substantially flush with the bottom surface 27 of the peripheral wall portion 20. In this embodiment, the annular bottom surface of the catch basin body 10 is formed by the concrete surface (bottom surface 27) and the exposed bottom surface 47 of the annular bottom plate portion 41. This facilitates the installation of the reinforcing member 40 (manufacturing of the catch basin body 10), and also ensures a stable shape and high strength of the bottom surface (annular bottom surface) of the catch basin body 10.

[0035] As shown in Figures 1 to 5, the vertical plate portions 42 and 43 of the reinforcing member 40 (annular angle member 44) extend in the vertical direction (up and down direction) of the peripheral wall portion 20 in the vertical cross-section of the peripheral wall portion 20, and the annular bottom plate portion 41 extends in the horizontal direction (width direction) of the peripheral wall portion 20 in the vertical cross-section of the peripheral wall portion 20. More specifically, in this embodiment, as shown in Figure 6, when the annular angle member 44 is installed within the bottom surface portion 26 of the peripheral wall portion 20, the vertical plate portions 42 and 43 of the annular angle member 44 are located approximately in the center of the thickness direction (left and right direction in Figure 6) of the peripheral wall portion 20, and the annular bottom plate portion 41 extends inward from the lower ends of the vertical plate portions 42 and 43 into the peripheral wall portion 20. This makes it possible to obtain reinforcing effects in the vertical and horizontal directions by the reinforcing member 40.

[0036] The process for installing such a water collection basin body 10 will be briefly explained.

[0037] Prior to the installation of the catch basin body, the catch basin body 10 as described above is manufactured in a factory. The catch basin body 10 can be manufactured using a mold for forming the peripheral wall portion 20, which includes the lid receiving projection portion 22 and the reinforcing thick portion 23. In this process, the reinforcing member 40 is placed inside the mold and so-called insert molding is performed to manufacture the catch basin body 10 equipped with the reinforcing member 40.

[0038] Then, the pre-fabricated (precast concrete) catch basin body 10 is transported to the site, and as shown in Figure 9, a cutting tool (such as a diamond cutter) is used to form a channel opening 34 at an appropriate position on the side walls 24 and 25 of the catch basin body 10. In this embodiment, channel openings 34 are formed in the first pair of side walls 24 and 24 of the peripheral wall portion 20 of the catch basin body 10. In the catch basin body 10, the side walls 24 and 25 are thinner than the reinforcing thickness portion 23, making it easier to form the channel openings 34.

[0039] In this embodiment, the catch basin body 10 is protected from damage to the catch basin body 10 (peripheral wall portion 20) at the lower part of the waterway opening 34 (bottom surface portion 26 of the peripheral wall portion 20) by the reinforcing member 40. Furthermore, the catch basin body 10 is protected from damage to the catch basin body 10 (peripheral wall portion 20) at the upper and side parts of the waterway opening 34 by the lid receiving projection portion 22 (and lid receiving member 31), the reinforcing thick portion 23, and the boundary recess 33.

[0040] Next, as shown in Figure 10, a base plate 35 is installed at the location where the catch basin body 10 will be installed. The base plate 35 may be formed by casting in place, or a pre-manufactured (precast concrete) base plate 35 may be used. In this embodiment, as shown in Figure 10, the central part of the base plate 35 is slightly thicker, and a water permeable hole 36 is formed in the center of the base plate 35, penetrating the base plate 35 in the thickness direction. A water permeable filter 37 is also provided above the water permeable hole 36. The water permeable filter 37 allows water to pass through while preventing stones of a certain size from passing through.

[0041] Next, the catch basin body 10, with the water channel opening 34 formed therein, is placed on the base plate 35. Then, as shown in Figure 10, adjustment mortar 38 is applied between the catch basin body 10 and the base plate 35 (specifically, between the inner surface of the catch basin body 10 and the thickened portion formed in the central part of the base plate 35 as described above). This more firmly fixes the catch basin body 10 and the base plate 35 and prevents the catch basin body 10 from moving (shifting) on ​​the base plate 35. In this way, the installation of the catch basin body 10 is completed.

[0042] In the main body of the water catch basin 10, the side walls 24 and 25 are thinner than the reinforcing thickened portion 23, which improves the workability when forming the channel opening 34 in the peripheral wall 20 (side walls 24 and 25). Furthermore, in the main body of the water catch basin 10, although there are no thickened portions (reinforcements) such as the lid receiving projection 22 or the reinforcing thickened portion 23 at the bottom surface 26 of the peripheral wall 20, the bottom surface 26 of the peripheral wall 20 is reinforced by the reinforcing member 40 which is arranged around the entire circumference of the bottom surface 26, thus preventing damage to the lower part of the peripheral wall 20 (side walls 24 and 25).

[0043] Furthermore, in the main body of the catch basin 10, the reinforcing member 40 comprises an annular angle member 44 having dimensions in the vertical (up and down) and horizontal directions in a longitudinal cross-section, and reinforcing members (lower reinforcing member 45 and upper reinforcing member 46) integrally fixed to the annular angle member 44 at its upper part. As a result, as shown in Figure 6, the reinforcing members 45 and 46 are arranged with a predetermined gap between them in the vertical direction and the annular bottom plate portion 41, and with a predetermined gap between them in the horizontal direction and the vertical plate portions 42 and 43. This allows the concrete material constituting the bottom surface portion 26 of the peripheral wall portion 20 to flow between the annular angle member 44 and the reinforcing members 45 and 46, which is thought to provide a stronger reinforcing effect.

[0044] Note that, as shown in Figure 11, the catch basin body 10a does not necessarily have to be equipped with a reinforcing bar. Even in such cases, the reinforcing effect of the bottom surface of the peripheral wall 20 can be obtained by the reinforcing member 40a (annular angle member 44a).

[0045] Furthermore, as shown in Figure 12, the annular angle member 44b of the reinforcing member 40b may be positioned such that, when it is installed within the bottom surface 26 of the peripheral wall, the vertical plate portions 42b and 43b of the annular angle member 44b are located approximately in the center of the thickness direction (left-right direction in Figure 12) of the peripheral wall 20, and the annular bottom plate portion 41b extends outward from the lower ends of the vertical plate portions 42b and 43b.

[0046] Furthermore, as shown in Figure 13, the annular angle member 44c of the reinforcing member 40c may be positioned such that, when it is installed within the bottom surface 26 of the peripheral wall, the vertical plate portions 42c and 43c of the annular angle member 44c are located approximately in the center of the thickness direction (left-right direction in Figure 13) of the peripheral wall, and the annular bottom plate portion 41c extends inward and outward from the lower ends of the vertical plate portions 42c and 43c (in other words, it may be approximately inverted T-shaped in the vertical cross-section).

[0047] Furthermore, as shown in Figure 14, the catch basin body 10d may be embedded within the bottom surface 26 of the peripheral wall. In other words, in the catch basin body 10d, the bottom surface 47d of the annular bottom plate 41d may not be exposed on the bottom surface 27 of the peripheral wall.

[0048] Furthermore, as shown in the embodiment of the catch basin body 10e in Figures 15 and 16, the catch basin body 10 (peripheral wall portion 20) may be equipped with reinforcing members 49 (vertical bars) extending in the vertical direction. The reinforcing members 49 (vertical bars) extending in the vertical direction are preferably placed at the corners of the peripheral wall portion 20, as shown in Figures 15 and 16, and are particularly preferably placed at all corners of the peripheral wall portion 20. In addition, the lower end of the reinforcing member 49 (vertical bar) extending in the vertical direction is preferably in contact with or close to the upper surface of the annular bottom plate portion 41, as shown in Figures 15 and 16. Also, in this embodiment, as shown in Figures 15 and 16, the lower end portion 50 of the reinforcing member 49 (vertical bar) extending in the vertical direction is placed at the corner of the annular angle member 44 and is sandwiched between the vertical plate portion 42, the vertical plate portion 43, the lower reinforcing bar member 45, and the upper reinforcing bar member 46. Furthermore, in this embodiment, as shown in Figures 15 and 16, the upper end of the vertically extending reinforcing member 49 (vertical bar) extends to near the upper end of the peripheral wall portion 20. However, the vertically extending reinforcing member 49 (vertical bar) may be shorter than that in the above-described embodiment, for example, its upper end may terminate near the vertical center of the peripheral wall portion 20. [Explanation of Symbols]

[0049] 10, 10a, 10b, 10c, 10d, 10e Water collection basin body 20 Peripheral wall section 21 Top opening 22 Lid holder protrusion 23 Thick reinforcement part 24 Side wall section (side wall section of the first set) 25 Side wall section (side wall section of the second set) 26 Bottom part 27 Bottom 31 Lid holder material 32 corners 33 Boundary recess 34 Waterway opening 40, 40a, 40b, 40c, 40d Reinforcement members 41 Annular base plate section 42 Vertical board section (vertical board section of the first set) 43 Vertical board section (vertical board section of the second set) 44 Annular angle member 45 Reinforcement members (lower reinforcement members) 46 Reinforcement members (upper reinforcement members) 47 Bottom

Claims

1. A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The reinforcing member comprises an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, and the bottom surface of the annular bottom plate portion is exposed at the bottom surface of the peripheral wall portion, characterized in that the main body of the water catch basin.

2. A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The reinforcing member comprises an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, wherein the vertical plate portion of the reinforcing member extends in the vertical direction of the peripheral wall portion in the vertical cross-section of the peripheral wall portion, and the annular bottom plate portion extends in the horizontal direction of the peripheral wall portion in the vertical cross-section of the peripheral wall portion.

3. A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The catch basin body is characterized in that the reinforcing member comprises an annular angle member having an annular bottom plate portion and a vertical plate portion extending upward from the annular bottom plate portion, and a rod-shaped reinforcing bar member fixed to the upper part of the vertical plate portion of the annular angle member.

4. The water collection basin body according to claim 2 or 3, wherein the bottom surface of the annular bottom plate portion is substantially flush with the bottom surface of the peripheral wall portion.

5. A precast concrete catch basin body having a polygonal cylindrical peripheral wall, The catch basin body comprises a peripheral wall portion, an upper opening formed on the upper part of the peripheral wall portion, a lid receiving projection formed on the inside of the upper opening on which a lid can be placed, a reinforcing thick portion formed at the inner corner of the peripheral wall portion, side wall portions formed on at least two surfaces of the peripheral wall portion, which are thinner than the reinforcing thick portion and on which a water channel opening can be formed by cutting a cutting tool, and a metal reinforcing member disposed within the bottom surface of the peripheral wall portion and around the entire circumference of the bottom surface. The peripheral wall portion is rectangular in shape, and the water collection basin body comprises a first set of side wall portions facing each other in the cross-section of the peripheral wall portion, and a second set of side wall portions facing each other in the cross-section of the peripheral wall portion and perpendicular to the first set of side wall portions. The reinforcing member comprises an annular bottom plate portion, an annular angle member having a first pair of vertical plate portions extending upward from the annular bottom plate portion and facing each other, and a second pair of vertical plate portions perpendicular to and facing the first pair of vertical plate portions, two rod-shaped lower reinforcing members suspended and fixed on both sides of the first pair of vertical plate portions or the second pair of vertical plate portions of the annular angle member, and two rod-shaped upper reinforcing members suspended and fixed on both sides of the two lower reinforcing members, and, The catch basin body is characterized in that the bottom surface of the annular bottom plate portion is exposed at the bottom surface of the peripheral wall portion.

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