Precast reinforced concrete secondary product

Abstract

To provide a precast reinforced concrete secondary product having a vertical position adjustment device for enabling vertical movement adjustment of the precast reinforced concrete secondary product, thereby facilitating vertical positioning and installation of the product.SOLUTION: A precast reinforced concrete secondary product comprises vertical position adjustment devices 3 at multiple locations on either the bottom slab 4 or the outer lower part 5a of the side wall 5 or both the bottom slab 4 and the outer lower part 5a of the side wall 5 of a U-shaped groove 1, to make the U-shaped groove body vertically adjustable relative to a foundation surface 2 on which the U-shaped groove 1 is installed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to precast reinforced concrete secondary products, such as U-shaped gutters (road gutters), waterways (large flumes), box culverts, and L-shaped retaining walls, which are manufactured in factories using concrete as the main raw material. [Background technology]

[0002] Precast reinforced concrete secondary products such as U-shaped gutters (road gutters), waterways (large flumes), box culverts, and L-shaped retaining walls are manufactured uniformly in factories using concrete as the main raw material, resulting in high product precision and strength, and they can be manufactured regardless of weather, and are used in a wide variety of places, including buildings, roads, waterways, etc. With regard to U-shaped gutters, a technology has been developed that provides a hanging part at the center of gravity of the U-shaped gutters to make them easier to install (for example, Patent Document 1 is disclosed). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-184852 A

[0004] Summary of the Invention [Problem to be solved by the invention]

[0005] However, as mentioned above, precast reinforced concrete secondary products are manufactured uniformly in factories using concrete as the main raw material, so the product has high precision and strength, can be constructed quickly, and can reduce construction time and costs, but skilled workers are required to install U-shaped gutters in a straight line, at the same gradient, or to make curves. When installing a U-shaped gutters, first, the foundation stone is laid and compacted, foundation concrete is poured on top of it, and after the foundation concrete has solidified, mortar is leveled on the top of the foundation concrete, and the U-shaped gutters are placed on the leveled mortar, and then they are hit with a hammer or mallet, the U-shaped gutters are shook left and right to align them with the level line, and the surface is level including the level line, and many other work processes require skilled workers.

[0006] Furthermore, when installing large precast reinforced concrete secondary products, which become heavier, in a specified position, for example a large flume or box culvert, each of the four corners is lifted in turn with a crowbar, jack or heavy machinery, a shim is inserted, and the top edge of the large flume or box culvert is aligned with a level line and installed on a horizontal surface including the level line, but after adjusting one edge, it may be necessary to adjust the adjusted edge again, which takes time to complete the installation. Also, shims are available in a graded range of thicknesses, and several shims of different thicknesses are used in combination, which requires adjustment in combination.

[0007] Also, as shown in Fig. 20, a conventional structure is known in which hanging hardware is screwed into positions on both side walls where the weight balance of the U-shaped gutter can be achieved, and the hanging hardware is hung by a crane or the like to install the U-shaped gutter in a balanced state (see, for example, Patent Document 1). However, when the U-shaped gutter is finally installed on the foundation surface, adjustments are made by applying leveling mortar and driving in wedges, which requires technology to adjust the flatness of the leveling mortar and the degree to which each wedge is driven in, and it can also be difficult to remove the hardware in narrow spaces.

[0008] Therefore, the present invention has been made to solve the above-mentioned problems, and aims to provide a precast reinforced concrete secondary product equipped with a vertical position adjustment device that adjusts the vertical position of the main body of the precast reinforced concrete secondary product so that even workers without special skills can easily install the precast reinforced concrete secondary product. [Means for solving the problem]

[0009] In order to solve the above problems, the U-shaped gutter of the present invention is characterized in that it is provided with up-down position adjustment devices at multiple locations on the bottom plate or the outer lower part of the side wall of the U-shaped gutter, or on both the bottom plate and the outer lower part of the side wall, so that the U-shaped gutter body can be moved and adjusted in the up-down direction relative to the foundation surface on which the U-shaped gutter is installed.

[0010] In addition, a vertical position adjustment device, which is composed of a nut with a female thread screwed into it and fixed to a support part, and a bolt with a male thread screwed into the nut, is arranged at multiple locations on the bottom slab of the U-shaped gutter so that the central axis of the female thread of the nut that constitutes the vertical position adjustment device faces in the same direction as the vertical direction of the U-shaped gutter, and the support part that constitutes the vertical position adjustment device is fixed to the concrete, and a bottomed hole such as a conical or cylindrical hole is formed in the bottom slab of the U-shaped gutter to allow the bolt screwed into the nut that constitutes the vertical position adjustment device to be screwed in and out from the top side of the U-shaped gutter bottom slab using a tool such as a wrench.

[0011] One method of manufacturing a U-shaped gutter so that a conical, cylindrical, or other bottomed hole is formed in the bottom slab of the U-shaped gutter is to screw and secure a square hole bottomed hole mold made in advance from a plastic material or the like to the end of a bolt that fixes a support part with a nut integrally fixed thereto at a predetermined position inside one of the outer formworks, fill the form combining one outer formwork and the other inner formwork with concrete, remove the bolt after the concrete has hardened, and remove the square hole bottomed hole mold from the demolded concrete.

[0012] In addition, preferably, a vertical position adjustment device is configured by screwing a socket bolt into the female threaded portion of a high nut with a socket that forms a truncated pyramid shape having a height lower than the gap dimension between one outer formwork and the other inner formwork, or a high nut with a socket that forms a trapezoidal column shape with a flange at its lower end, and the central axis of the female thread of the high nut with a socket that forms a truncated pyramid shape or a high nut with a socket that forms a trapezoidal column shape with a flange at its lower end may be arranged in a plurality of locations on the outer lower part of the bottom slab or side wall of the U-shaped gutter, or on both the bottom slab and the outer lower part of the side wall, with the central axis of the female thread of the high nut with a socket that forms a truncated pyramid shape or a high nut with a socket that forms a trapezoidal column shape with a flange at its lower end facing in the same direction as the vertical direction of the U-shaped gutter, and the outer peripheral surface of the high nut with a socket that forms a truncated pyramid shape or the high nut with a socket that forms a trapezoidal column shape with a flange at its lower end is fixed integrally to the concrete.

[0013] In addition, preferably, a vertical position adjustment device is configured by screwing a plastic socket bolt into the female threaded portion of a plastic high nut molded in a truncated pyramid shape or a high nut molded in a trapezoidal column shape with a flange around its lower end, which has the same height as the gap dimension between one outer formwork and the other inner formwork, and is arranged at multiple locations on the outer lower part of the bottom slab or side wall of the U-shaped gutter, or on both the bottom slab and the outer lower part of the side wall, with the central axis of the female thread of the socket high nut forming a truncated pyramid shape or the socket high nut forming a trapezoidal column shape with a flange at its lower end facing in the same direction as the vertical direction of the U-shaped gutter, and the outer peripheral surface of the socket high nut forming a truncated pyramid shape or the socket high nut forming a trapezoidal column shape with a flange at its lower end is fixed integrally to the concrete.

[0014] Preferably, the vertical position adjustment device is arranged on the center line between both side walls of one side of the U-shaped groove body that bisects the center line between both side walls on the bottom plate, in a direction perpendicular to the center line between the both side walls, so that the vertical position adjustment device is aligned with the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate, and the vertical position adjustment device is arranged on the other side of the U-shaped groove body that bisects the center line between both side walls of the bottom plate, in a direction perpendicular to the center line between the both side walls, at symmetrical positions on either side of the center line between the both side walls of the U-shaped groove body, so that the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate is aligned with the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate, respectively.

[0015] In addition, preferably, the vertical position adjustment device is arranged at the center of gravity of one end of the U-shaped groove divided into three equal parts in the sidewall direction, with the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate being aligned with the vertical position adjustment device, and the vertical position adjustment device may be arranged at or near the respective center of gravity positions symmetrical about the center line between the both side walls of the U-shaped groove body, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate being aligned with the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate.

[0016] In addition, preferably, the U-shaped groove body is divided in half in the water flow direction of the U-shaped groove at a weight ratio of 2:1, and the vertical position adjustment device is arranged on one side of the U-shaped groove at the weight ratio of 1, and on the bisector that divides one side of the U-shaped groove in a direction perpendicular to the water flow direction, so that the vertical position adjustment device is aligned with the center line of the female thread portion of the nut integrated into the substrate. Alternatively, the U-shaped groove body may be divided in half in the water flow direction of the U-shaped groove at a weight ratio of 2:1, and on the other side of the U-shaped groove at the weight ratio of 2:1, and on the bisector that divides the other side of the U-shaped groove in a direction perpendicular to the water flow direction, so that the vertical position adjustment device is aligned with the center axis of the female thread portion of the nut integrated into the substrate.

[0017] The present invention also provides a U-shaped gutter having a load distribution dish attached in a swivel state to the tip of the bolt that constitutes the vertical position adjustment device to distribute the load from the U-shaped gutter body.

[0018] The present invention also provides an FTL-type waterway comprising a bottom plate that constitutes an FTL-type waterway and a footing protrusion on the opposite side of the bottom plate and the lower part of a side wall, with vertical position adjustment devices arranged at multiple locations on the bottom plate of the FTL-type waterway in the same direction as the side walls that constitute the FTL-type waterway, and with vertical position adjustment devices arranged at multiple locations on the footing protrusion in the same direction as the side walls that constitute the FTL-type waterway.

[0019] The present invention provides a wedge-shaped up / down position adjustment device that is configured by providing a continuously enlarged guide groove in the inclination direction of the slope of the wedge-shaped fixed base with guide groove, providing a protrusion with a flared cross-sectional shape that slides along the inclination direction of the slope of the wedge-shaped movable part, and orienting the thin tip of the wedge-shaped fixed base with guide groove and the thin tip of the wedge-shaped movable part in opposite directions like a Z-shape, and inserting the protrusion of the wedge-shaped movable part into the guide groove of the wedge-shaped fixed base with guide groove, so that the wedge-shaped movable part can slide.

[0020] Furthermore, the present invention provides a parallel wedge-shaped vertical position adjustment device that is configured in such a way that multiple rows of continuously enlarged guide grooves are recessed in parallel along the inclination direction of the slope of the wedge-shaped fixed base with guide groove, and protrusions with a flared cross-sectional shape that slide along the guide grooves are protruding along the inclination direction of the slope of the wedge-shaped movable part, and the thin tip of the wedge-shaped fixed base with guide groove and the thin tip of each wedge-shaped movable part are facing in opposite directions like a Z-shape, and the protrusions protruding along the inclination direction of the slope of each wedge-shaped movable part are inserted into each of the guide grooves that are recessed in parallel in multiple rows on the wedge-shaped fixed base with guide groove, thereby combining the wedge-shaped movable parts in a slidable state. Effect of the Invention

[0021] As described above, according to the present invention, the precast reinforced concrete secondary product equipped with the vertical position adjustment device can be easily adjusted in the vertical direction relative to the foundation surface by adjusting the screwing and unscrewing of the bolts equipped on the main body with a tool such as a wrench, and by using the wedge-shaped vertical position adjustment device that functions independently when installing the precast reinforced concrete secondary product, various precast reinforced concrete secondary products can be easily moved and adjusted in the vertical direction relative to the foundation surface and the foundation surface can be adjusted to be flat. Furthermore, no leveling mortar is required during installation, so the installation work of the precast reinforced concrete secondary product can be performed even during rainfall, and as a result, skilled workers are not required for the installation work, and installation time and construction costs can be reduced. Furthermore, it can be used to deal with the upper limit regulations on overtime work and the difficulty in gathering personnel. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic cross-sectional view (in a direction perpendicular to the water flow) of a U-shaped gutter according to a first embodiment of the present invention, showing an enlarged cross-sectional view of a main part of the configuration of a vertical position adjustment device. [Diagram 2] 1 is a schematic cross-sectional view of a first embodiment of the present invention in which a vertical position adjustment device is provided at a predetermined position on a protruding portion provided on each of the outer lower parts of both side walls that form a U-shaped groove. FIG. [Diagram 3] 1 is a schematic partial cross-sectional view of a bottomed mold, such as a conical or cylindrical mold, placed in a mold frame. [Figure 4] Figure 4(a) is a schematic partial cross-sectional view of a U-shaped gutter in which a metal high nut that forms a truncated pyramid shape is used as the nut that constitutes the vertical position adjustment device, and Figure 4(b) is a schematic partial cross-sectional view of a U-shaped gutter in which a metal high nut that forms a truncated prism shape with a flange at its lower end is used as the nut that constitutes the vertical position adjustment device. [Diagram 5] 1 is a schematic partial cross-sectional view of a U-shaped groove in which a square nut having a square outer shape is used as the nut that constitutes the vertical position adjustment device. [Figure 6]Figure 6(a) is a schematic partial cross-sectional view of a U-shaped gutter in which a plastic high nut molded into a truncated pyramid shape is used as the nut that constitutes the vertical position adjustment device, and Figure 6(b) is a schematic partial cross-sectional view of a U-shaped gutter in which a plastic high nut molded into a truncated column shape with a brim around the lower end is used as the nut that constitutes the vertical position adjustment device. [Figure 7] FIG. 13 is an explanatory diagram showing the position of a vertical position adjustment device provided in a U-shaped gutter. [Figure 8] FIG. 11 is another explanatory diagram showing the arrangement position of the vertical position adjustment device provided in the U-shaped gutter. [Figure 9] FIG. 13 is an explanatory diagram showing an example of installing a U-shaped gutter. [Figure 10] 13 is yet another explanatory diagram showing the arrangement position of the vertical position adjustment device provided in the U-shaped gutter. FIG. [Figure 11] 13 is yet another explanatory diagram showing the arrangement position of the vertical position adjustment device provided in the U-shaped gutter. FIG. [Figure 12] 13 is an explanatory diagram of a U-shaped groove with a load distribution plate in which the load distribution plate is attached in a swivel state to the tip of a bolt that constitutes a vertical position adjustment device in accordance with a second embodiment of the present invention. FIG. [Figure 13] This is an oblique view of the bottom surface of a U-shaped groove with a load distribution dish having a protruding portion on the bottom surface. [Figure 14] This is an oblique view of an FTL type waterway equipped with a vertical position adjustment device, viewed diagonally from above. [Figure 15] FIG. 13 is a schematic external perspective view illustrating a wedge-shaped vertical position adjustment device according to a third embodiment of the present invention. [Figure 16] FIG. 2 is a schematic external side view illustrating a wedge-shaped vertical position adjustment device. [Figure 17] FIG. 1 is a cross-sectional view illustrating the configuration of a wedge-shaped vertical position adjustment device. [Figure 18] FIG. 11 is a schematic explanatory cross-sectional view illustrating the configuration of a parallel wedge-shaped vertical position adjustment device according to a modified example. [Figure 19] 13A to 13C are a side view, a right side view, and a left side view illustrating the configuration of a wedge-shaped vertical position adjustment device with an anchor bolt through-hole according to a modified example. [Figure 20]FIG. 13 is a diagram showing an example of a conventional U-shaped groove block movement. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same elements are designated by the same reference numerals, and duplicated explanations will be omitted. Then, a vertical position adjustment device for vertically adjusting various precast reinforced concrete secondary products will be described in order, taking as an example a case where the vertical position adjustment device is provided at multiple locations of a U-shaped gutter among various precast reinforced concrete secondary products.

[0024] (First embodiment) (U-shaped groove embodiment) As shown in FIG. 1 and the enlarged cross-sectional view of the main part shown in FIG. 1, the U-shaped gutter 1 is configured by fixing a metal nut 7 (the nut may be a round nut or a square nut) having a female thread 6 to a metal support 8 by welding or the like, and screwing a metal bolt 10 (the bolt may be a square bolt or a square socket head bolt) having a head and a threaded portion having a male thread 9 to the nut 7, so that the central axis G-G of the female thread 6 of the nut 7 constituting the vertical position adjustment device 3 is aligned with the (rear) axis of the U-shaped gutter bottom slab 4. The support parts 8 constituting the vertical position adjustment device 3 are fixed integrally to the concrete 11, and furthermore, bottomed holes 12 such as conical or cylindrical holes are formed in the bottom slab 4 of the U-shaped gutter 1 so that bolts 10 threaded into nuts 7 constituting the vertical position adjustment device 3 can be screwed in and out from the top side of the U-shaped gutter bottom slab 4 with a tool such as a wrench.

[0025] The position of the vertical position adjustment device 3 indicated by arrow a in Fig. 1 is, among the three positions of the vertical position adjustment device 3 provided on the bottom slab 4 of the U-shaped gutter, a position at the center A on the center line E-E (water flow direction, the same applies below) of the bottom slab 4 between both side walls 5, 5 of the U-shaped gutter 1, in the position of the vertical position adjustment device 3 shown as an example of the position in Fig. 8, and the positions indicated by arrows b and c in Fig. 1 indicate the centers B and C or the vicinity of the centers B and C shown in Fig. 8. Furthermore, the U-shaped gutter 1 shown in Fig. 2 is provided with a plurality of vertical position adjustment devices 3 in the directions of both side walls 5, 5 at the positions indicated by arrows d and e in the protruding parts provided on the outer lower parts 5a, 5a of both side walls 5, 5 that constitute the U-shaped gutter 1.

[0026] In the above-described embodiment, the vertical position adjustment device 3 has been described as an example in which a metal nut 7 is fixed to a metal support part 8 by welding or the like, and a metal bolt 10 is screwed into the female thread 6 of the nut 7. However, the material is not limited to metal, and other vertical position adjustment devices may be used, for example, as described below, in which a female thread for screwing a plastic bolt is threaded into a support part whose strength is ensured by a plastic material, and the plastic bolt is screwed into the female thread.

[0027] 1, which is threaded into the nut 7 constituting the vertical position adjustment device 3, is formed in the U-shaped ditch bottom slab 4 above the support part 8 when the U-shaped ditch 1 is completed. In this manner, when the U-shaped ditch 1 is manufactured, the support part 8 to which the nut 7 is fixed is fixed in advance to the inside of one of the outer formworks 13 by a support part fixing bolt 10a (having the same diameter as the nominal diameter of the screw of the bolt 10 constituting the vertical position adjustment device 3, the threaded part with the male screw is threaded to about the same size as the female screw part of the nut 7, and the tip of the male screw is formed into a cylindrical shape) inserted from the outside of a bolt through hole opened in one of the outer formworks 13 as shown in FIG. 3. Next, a conical or cylindrical square hole with a base 12 having the same shape as the depth and inner diameter of the base hole 12, which has been previously manufactured from plastic or the like, is inserted into the U-shaped ditch bottom slab 4 above the support part 8. A dovetail hole mold 14 (hereinafter, a square hole with a bottom) is inserted and fixed into the cylindrical portion protruding above the nut 7, and then concrete 11 is poured into the formwork formed by combining an outer formwork 13 on one side and an inner formwork 15 on the other side. After the concrete 11 hardens, the upper surface of the metal support part 8, the bent part 16 provided at the end of the support part 8, and the square hole with a bottom mold 14 body are fixed together with the poured concrete 11. However, the outer formwork 13 on the other side The bolts 10a screwed in from the outside are unscrewed and removed, and then the square hole baseless hole form 14 is removed from the solidified concrete 11 after the outer formwork 13 and the inner formwork 15 are removed using an impact wrench equipped with a socket that fits the size of the square hole 17 in the square hole baseless hole form 14.When the U-shaped gutter 1 is completed, a baseless hole 12 (the bottom of the hole is the central upper surface of the support part) with a conical or cylindrical shape will be formed in the U-shaped gutter bottom slab 4.

[0028] The square hole, bottomed mold 14 has a structure and function roughly similar to that of a part commonly known as a 'P-con' which is conventionally attached to the end of a separator placed between formwork to determine and maintain the gap within the formwork when pouring concrete, and has a shape and strength such that after it is placed within a formwork consisting of an outer formwork 13 on the one hand and an inner formwork 15 on the other hand, the position of the square hole, bottomed mold 14 will not be displaced by the concrete poured into the formwork, and it will continue to maintain that position.

[0029] In addition, after the installation of the U-shaped gutter in which the vertical position of the U-shaped gutter 1 has been adjusted by the bolts 10 constituting the vertical position adjustment device 3, the bottomed holes 12 formed in the U-shaped gutter bottom slab 4 are filled with concrete, non-shrink mortar, synthetic resin-based anti-corrosive sealant, etc. to prevent corrosion by water on the nuts 7, supports 8, bolts 10, etc., and are molded to the same surface as the U-shaped gutter bottom slab 4.

[0030] Then, the nut 7 is changed to a metal high nut (or long nut, hereinafter referred to as high nut) 20 that is taller (longer) than the nut 7 and has a vertex P above the bottom slab 4 of the U-shaped gutter 1 as shown in FIG. 4(a), or a metal high nut (or long nut, hereinafter referred to as high nut) 22 that is formed in a trapezoidal column shape and has a flange (preferably a square shape that is firmly integrated with concrete) 21 on the underside of the bottom slab 4 of the U-shaped gutter 1 as shown in FIG. 4(b). Then, the bolt that is screwed into the female thread 23 of the high nut 20 that forms the trapezoidal pyramid shape or the high nut 22 that forms the trapezoidal column shape with a flange at the lower end as shown in FIG. Other vertical position adjustment devices 3a and 3b in which the metal square-hole bolt 24 shown in (b) is modified and combined may be used. In the case of each of the vertical position adjustment devices 3a and 3b, the height and contact area of ​​the screwed portion between the female thread 23 of each high nut 20, 22 and the male thread 25 of the square-hole bolt 24 can be made large, resulting in a large height adjustment range for the U-shaped gutter 1. In addition, since each high nut 20, 22 is formed in a truncated pyramid shape or a truncated prism shape with a flange at the lower end, the load resistance of the U-shaped gutter 1 body can be secured after being firmly fixed to the concrete 11. The square-hole bolt 24 may be a square hole, a hexagonal hole, an octagonal hole, a plus hole, or a minus hole.

[0031] If the nuts and bolts are made of metal, rust will occur and corrosion will begin when they come into contact with running water. Therefore, in order to prevent the nuts and bolts from coming into contact with running water when water is flowed into the U-shaped gutter 1 and corroding them, the heights of the metal high nuts 20 that form a truncated pyramid shape and the metal high nuts 22 that form a truncated prism shape with a flange 21 on the periphery or part of the lower end are set so as not to reach the upper surface side (the other inner formwork 15) of the U-shaped gutter bottom slab 4, and when the U-shaped gutter 1 is manufactured, the high nuts 20, 22 are inserted from the outside into a bolt-through hole opened at a fixed position in one of the outer forms 13, and are fixed to the inside of one of the outer forms 13 by a bolt 10b inserted from the outside into a bolt-through hole opened at a fixed position in one of the outer forms 13. Furthermore, in order to prevent the inflow of concrete, water containing cement, etc., poured into the formwork, etc., plastic caps 26 with a plus or minus hole (a cap with a square hole is also acceptable) shown in Figures 4(a) and (b) are fitted into the upper surface side (inner surface side of the other inner formwork 15) of the U-shaped gutter bottom slab 4 of the metal high nuts 20 that form a truncated pyramid shape or the metal high nuts 22 that form a truncated rectangular column shape with a flange 21 around or on the lower end portion, thereby integrating one outer formwork 13 and the other inner formwork 15.

[0032] Furthermore, the caps 26 with plus and minus holes do not deform or have their cap position displaced by the concrete poured into the formwork in which one outer formwork and the other inner formwork are integrated, and after the poured concrete has hardened, they can be removed with a Phillips or flat head screwdriver or an impact driver, and the vertical position of the U-shaped gutter 1 can be adjusted with the square socket bolts that make up the vertical position adjustment devices 3a, 3b.Then, the recesses are sealed with non-shrink mortar or the like to prevent water from entering the nuts and bolts and to prevent the formation of rust.

[0033] As shown in Fig. 5, a U-shaped gutter 1 equipped with another vertical position adjustment device 3c is also conceivable, in which a metal (or plastic) square nut 30 having a certain height (thickness) and size and an outer shape is integrated directly with the concrete 11, and a bolt (bolt 10 shown in Fig. 1) is screwed into the square nut 30 integrated with the concrete from the opening of a bottomed hole 12 formed in the U-shaped gutter bottom slab 4. In the vertical position adjustment device 3 shown in Fig. 1, a metal nut 7 with a female thread 6 is fixed integrally to a metal support part 8 by welding or the like, but by changing to a square nut 30 that combines a nut part and a support part, the number of parts can be reduced. This will be explained below.

[0034] As shown in FIG. 5, the manufacturing method is as follows: the square nut 30 is fixed to the inside of one of the outer formworks 13 by a bolt 10a inserted from the outside into a bolt through hole opened at a predetermined position of the one of the outer formworks 13; and a square hole with a bottomed hole mold 14 with a bottomed hole of the same shape as the bottomed hole 12, such as the depth and inner diameter, made of plastic and shown in FIG. 3, is inserted into one of the outer formworks 13 so that a bottomed hole 12 of a conical or cylindrical shape or the like is formed in the U-shaped gutter bottom slab 4 so that the bolt (bolt 10 shown in FIG. 1) screwed into the square nut 30 can be screwed in and out with a tool such as a wrench when adjusting the vertical position of the U-shaped gutter 1. The square nut 30 and the square hole with base 14 are integrated into the formwork formed by combining one outer formwork 13 and the other inner formwork 15, and concrete 11 is poured into the formwork. After the concrete has solidified, the square nut 30 and the square hole with base 14 are integrated with the concrete. Then, the bolt 10a, one outer formwork 13 and the other inner formwork 15 are removed, and an impact wrench or the like is inserted into the square hole 17 of the square hole with base 14 to remove it, thereby manufacturing a U-shaped gutter 1 in which a conical, cylindrical, or other shaped base hole 12 is formed in the U-shaped gutter bottom slab 4.

[0035] In addition, the square nut 30 of the vertical position adjustment device 3c which uses the square nut 30 has a height that ensures the required female screw thread, and therefore the depth of the bottomed hole 12 is the remainder obtained by subtracting the height of the square nut 30 from the thickness of the U-shaped groove bottom plate 4.

[0036] Furthermore, the strength of the female thread 6 threaded into the square nut 30 and the male thread 9 threaded into the bolt 10 is such that even when the bolt 10 is screwed into the square nut 30 and a load from the U-shaped gutter 1 is applied to the threaded portion between the female thread 6 and the male thread 9, they can withstand the load from the U-shaped gutter 1 and continue to support the U-shaped gutter 1. Furthermore, in the square nut 30, even when the bolt 10 is screwed into the square nut 30 and a load from the U-shaped gutter 1 is applied, the square nut 30 is fixed as an integrated unit in a state in which the outer surface of the square nut 30 and the concrete 11 continue to be fixed to each other.

[0037] Furthermore, further vertical position adjustment devices 3d and 3e can also be considered that are configured by changing the vertical position adjustment device 3 and vertical position adjustment devices 3a, 3b, 3c made of the above-mentioned metal nuts and bolts to plastic nuts and bolts made of a plastic material; unlike metal materials, plastic materials do not rust or corrode, and therefore they can be exposed on the top surface of the base slab 4 where water flows. Below, we will explain vertical position adjustment devices 3d and 3e made of plastic nuts and bolts.

[0038] Each of the vertical position adjustment devices 3d, 3e, which are composed of plastic nuts and bolts, does not require the cap 26 with a cross hole or a cross hole shown in Fig. 3(a)(b) by setting the overall height of the plastic high nut 35 molded in a cross-pyramid shape as shown in Fig. 6(a) or the plastic high nut 37 molded in a prismatic shape with a flange (preferably rectangular) 36 around or on the lower end portion as shown in Fig. 6(b) to the dimension of the gap between one outer formwork 13 and the other inner formwork 15, like the metal high nut formed in a truncated pyramid shape with a vertex P above the bottom slab 4 as shown in Fig. 4(a) described above. Furthermore, the length of the female thread 6 portion that is threaded into each of the high nuts 35, 37 does not exceed the maximum length of the gap between one outer formwork 13 and the other inner formwork 15. Furthermore, on the side of the square socket bolt 24 (shown in FIG. 4) that screws into each of the high nuts 35, 37, the length of the male thread 25 that screws into the square socket bolt 24 can be set to the gap dimension between one outer formwork 13 and the other inner formwork 15. This allows each of the up-down position adjustment devices 3d, 3e, which is formed by combining each of the high nuts 35, 37 and the square socket bolt 24, to have a large contact area at the screwed portion between the nut and the bolt. As a result, the height adjustment range of the U-shaped gutter is large, and the plastic high nut 35 molded in a truncated pyramid shape and the plastic high nut 37 molded in a truncated column shape with a flange 36 around the lower end are less likely to come loose from the concrete, ensuring the strength to withstand the load from the U-shaped gutter.

[0039] When the plastic high nut 35 molded in the truncated pyramid shape or the plastic high nut 37 molded in the truncated prism shape with a flange 36 on the periphery or part of the lower end is attached to the inside of the formwork, for example, bolt holes are opened at predetermined positions set in one outer formwork 13 and the other inner formwork 15 so that the center line (not shown) of the high nut 35 faces the same direction as the up-down direction of the U-shaped gutter 1 when the U-shaped gutter is completed, as shown in FIG. 6(a), and the bolt holes are opened at predetermined positions set in one outer formwork 13 and the other inner formwork 15, and the bolt holes are opened at predetermined positions set in one outer formwork 13 and the other inner formwork 15 so that the center line (not shown) of the high nut 35 faces the same direction as the up-down direction of the U-shaped gutter 1 when the U-shaped gutter is completed, as shown in FIG. The high nut 35 is fixed inside the one of the outer forms 13 by a special bolt 38 inserted through a bolt through hole opening on the side of the frame 13, and then the tip of the special bolt 38 is passed through a through hole for the bolt tip opening on the other side of the inner form 15, and a nut 40 is screwed onto the male thread of the tip of the special bolt protruding outside the other inner form 15, so that the center line of the high nut 35 faces the same direction as the up-down direction of the U-shaped gutter 1 when the U-shaped gutter 1 is completed. Furthermore, when a plastic high nut 37 molded into a prism shape with a flange 36 around or on the lower end as shown in FIG. 6(b) is attached inside the form, the high nut 37 may be fixed only to one of the outer forms 13 if sufficient strength is ensured so that the form does not deform. It may also be fixed inside the form by a special bolt 38 as shown in FIG. 6(a).

[0040] In addition, the dedicated bolt 38 is a dedicated bolt for attaching the high nut 35 inside a formwork, and as shown in Figure 6 (a), a male thread 9 for fixing the high nut 35 to the inside of one of the outer formworks 13 is threaded near the head of the dedicated bolt 38, and the end of the male threaded portion forms a cylindrical portion 41 with an outer diameter slightly smaller than the inner diameter of the female thread 6 threaded into the high nut 35, and further, a male thread with a nominal diameter smaller than the outer diameter of the cylindrical portion 41 is threaded into the end of the cylindrical portion 41, and a nut 40 is screwed onto the male threaded portion.

[0041] Then, after each high nut 35, 37 is installed within the formwork, concrete is poured into the formwork in the same manner as in manufacturing the U-shaped gutter described above, and after the concrete has solidified, the special bolt 38, one outer formwork and the other inner formwork are removed, and the up and down position adjustment devices 3d, 3e are formed in the U-shaped gutter bottom slab.

[0042] Furthermore, it is also possible for the cross-sectional shape of the outer periphery of each high nut 35, 37 to be a hyperbolic shape in which the central part of the nut is narrower than both ends, and by placing the high nut forming a hyperbolic shape at a predetermined position in the formwork and integrating it with the concrete, the high nut can be fixed above and below the U-shaped gutter bottom slab 4 in a non-removable state.

[0043] The support parts constituting the above-mentioned vertical position adjustment devices 3, 3a, 3b, 3c, 3d, and 3e, the nuts fixed to the support parts, the screwing parts with the bolts screwed into the female threads of the nuts, and the load distribution plates described below have load-bearing capacity that can withstand the load from the U-shaped groove that occurs during and after the bolt screwing and unscrewing operations. The same applies to each of the embodiments described below.

[0044] Next, the position of each vertical position adjustment device provided in the U-shaped gutter will be explained. Of the vertical position adjustment devices, the position will be explained using the vertical position adjustment device 3 as an example, which is configured by fixing a metal nut 7 with a female thread 6 to a metal support part 8 by welding or the like, and screwing a metal bolt 10 into the nut 7, as shown in Fig. 1 and the enlarged cross-sectional view of the main part of Fig. 1.

[0045] As shown in Figure 7, a U-shaped gutter 1 can be considered in which the vertical position adjustment device 3 is arranged on one side 45a (left side of the drawing) of the U-shaped gutter body with the central axis of the female thread 6 of the nut 7 that constitutes the vertical position adjustment device 3 and is integrated into the support part 8 aligned with the center line E-E (water flow direction) on the bottom slab 4 between both side walls 5, 5 of the U-shaped gutter 1, across the bisector F-F that bisects the center line E-E (water flow direction) on the bottom slab 4 between both side walls 5, 5 of the U-shaped gutter 1, and the vertical position adjustment devices 3 are arranged on the other side 45b (right side of the drawing) of the U-shaped gutter body, symmetrically across the center line E-E, with the central axes of the female thread 6 of each nut 7 that constitutes the vertical position adjustment device 3 and is integrated into the support part 8 aligned with each other.

[0046] In detail, as shown in FIG. 8, in order to support the U-shaped gutter 1 in a stable state, the weight of the U-shaped gutter 1 is divided into three equal parts and supported by each of the vertical position adjustment devices 3, and the center of gravity A of one end 46a (left side of the drawing) of the U-shaped gutter 1 divided into three equal parts in the sidewall direction, and the center of gravity B and center of gravity C or the center of gravity C at the joint of the central part 46b (center of the drawing) and the other end 46c (right side of the drawing) of the U-shaped gutter 1 divided into three equal parts in the sidewall direction are symmetrical with respect to the center line E-E between both side walls of the U-shaped gutter body. It is advisable to place each vertical position adjustment device 3 in the U-shaped gutter 1 by aligning the central axis of the female threaded portion of the nut 7 integrated into the support portion 8 with the vertical position adjustment device 3 near the position of the center of gravity B and C (due to the weight of the side wall portion in the U-shaped gutter, it is possible that the center of gravity positions B and C will overlap with the curved portion connecting the inner surface of the side wall and the inner surface of the bottom plate, and therefore, in order to position the planar upper surface of the conical or cylindrical square hole with bottomed hole mold 14 on the planar inner surface of the bottom plate, near the center of gravity positions B and C).

[0047] However, in terms of the position of each vertical position adjustment device 3, after the U-shaped gutter 1 is installed in a fixed position on the foundation surface 2, concrete is poured onto the side parts of the U-shaped gutter bottom slab 4 and the underside of the side parts of the bottom slab 4, and after the poured concrete has hardened, the hardened concrete also supports the U-shaped gutter 1. Therefore, it is not necessary for each vertical position adjustment device 3 to support the weight of the U-shaped gutter 1 in three equal parts, and the vertical position adjustment devices 3 may be placed on the flat parts near the center of gravity positions B and C of the U-shaped gutter bottom slab 4.

[0048] Next, a description will be given of a case where a U-shaped gutter 1 equipped with vertical position adjustment devices 3 on a bottom slab 4 is installed on a foundation surface 2. The U-shaped gutter 1 is equipped with vertical position adjustment devices 3 arranged at three locations near center of gravity A, center of gravity B, center of gravity C, or centers of gravity B and C of the bottom slab 4 as shown in Fig. 8, and is installed on a foundation surface 2.

[0049] The case where the foundation surface 2 on which the U-shaped gutter 1 is to be installed is formed by laying and compacting foundation quarry stones, pouring foundation concrete on the top surface, applying leveling mortar on the solidified foundation concrete, and installing the U-shaped gutter 1 on top of that will be described. However, after adjusting the vertical position of the U-shaped gutter 1, the U-shaped gutter is supported by each vertical position adjustment device 3, and after the concrete poured on the side part and the bottom part of the U-shaped gutter bottom slab 4 solidifies, the solidified concrete also supports the U-shaped gutter 1, so an installation method that omits the leveling mortar is also conceivable. In addition, it is possible that the poured concrete does not reach the vertical position adjustment device 3 at the center of gravity position A of the bottom slab 4 shown in Figure 8, so it is advisable to pile mortar on the part where the bolt 10 constituting the vertical position adjustment device 3 protrudes, limited to the vertical position adjustment device 3 at the center of gravity position A of the bottom slab 4. Furthermore, when a cover is provided after the U-shaped gutter 1 is installed, it is advisable to apply leveling mortar on the foundation concrete in order to handle the load applied when a vehicle passes over the cover.

[0050] The bolts 10 of the vertical position adjustment devices 3 provided on the U-shaped gutter 1 should be screwed in beforehand and protruded from the underside of the bottom slab 4 so that the top end 50 of the U-shaped gutter 1 is located above the level line 51 when the U-shaped gutter 1 body is placed on the foundation surface 2. Therefore, the design ground is determined by calculating backwards for the foundation surface 2 so that the top end 50 of the U-shaped gutter 1 is located above the level line 51 when the U-shaped gutter 1 is placed with the bolts 10 constituting the vertical position adjustment devices 3 provided on the U-shaped gutter bottom slab 4 protruding as much as possible.

[0051] As an example of how to install the U-shaped gutter 1 on the foundation surface 2, as shown in FIG. 9, mortar is piled up on the dotted circled portion of the foundation surface 2 where the tip of the bolt 10 constituting the vertical position adjustment device 3 at the center of gravity A comes into contact (so that the metal bolt 10 does not come into direct contact with water), and then, of the vertical position adjustment devices provided on the U-shaped gutter 1, the center of gravity positions B and C sides are directed toward the start line, and the top end 50 of one side wall of the U-shaped gutter 1 is placed at or above the level line 51, and then Then, gradually return the bolts 10 of the vertical position adjustment devices 3 provided at center of gravity positions B and C to level this portion (the horizontal direction perpendicular to the center line E--E between both side walls 5, 5 of the U-shaped gutter 1) and align it with the level line, then unscrew the bolts 10 of the vertical position adjustment devices 3 provided at center of gravity position A on the opposite side of the start line to bring the top edge 50 of the U-shaped gutter 1 closer to the level line 51, and further repeat fine adjustments of the nuts 7 of the vertical position adjustment devices 3 to install the U-shaped gutter 1 in the fixed position. Also, if the top edge 50 of the U-shaped gutter 1 does not match the level line 51, it is recommended to make corrections using a tool such as a crowbar.

[0052] Then, in the U-shaped gutter 1 to be installed next to the first one, similarly to the first U-shaped gutter 1 installed, the center of gravity B and center of gravity C side equipped with the vertical position adjustment device are faced toward the start line, and the center of gravity B and center of gravity C side are aligned with the level line while being leveled, and further, the center of gravity A side of the U-shaped gutter 1 is adjusted so that the top edge 50 of one side wall is aligned with the level line 51, and then concrete is poured into the side portion and lower part of the U-shaped gutter bottom slab 4.

[0053] Conversely, the U-shaped gutter 1 may be installed with the center of gravity position A side of the U-shaped gutter 1 facing the start line side. After installing multiple U-shaped gutter 1, the gaps between the U-shaped gutter 1, both side surfaces 5, 5 of the U-shaped gutter bottom slab 4, the depths of both side surfaces 5, 5, and the cylindrical bottomed holes are filled with concrete, non-shrink mortar, and a filler such as a synthetic resin-based anticorrosive sealant.

[0054] 10, the position of each vertical position adjustment device 3 in the U-shaped gutter 1 is divided in half in the water flow direction E'-E' of the U-shaped gutter at a weight ratio of 2:1, and the vertical position adjustment device 3 is arranged at or near the center of gravity L on the bisector F-F that bisects the water flow direction E'-E of the U-shaped gutter on one side 52a of the U-shaped gutter at the weight ratio 1 side of the 2:1 weight ratio, with the center line of the female thread part of the nut that constitutes the vertical position adjustment device and is integrated into the support part coinciding with the center line of the female thread part of the nut that constitutes the vertical position adjustment device and is integrated into the support part. Also, the vertical position adjustment device 3 is arranged symmetrically across the bisector F-F that bisects the water flow direction E'-E' of the U-shaped gutter on the other side 52b of the U-shaped gutter at the weight ratio 2:1 of the U-shaped gutter body divided in half in the water flow direction E'-E' of the U-shaped gutter at a weight ratio of 2:1. The vertical position adjustment devices may be arranged at or near the center of gravity positions M and N, respectively, by aligning the center lines of the female threaded portions of the nuts that constitute the vertical position adjustment device and are integrated into the support portion, and each vertical position adjustment device will support a load of one-third of the weight of the U-shaped gutter body. In particular, at the center of gravity position L, the weight of one side wall 5 of the U-shaped gutter is also added to the U-shaped gutter bottom plate 4 side, so it is possible that the center of gravity position will be located on one side wall of the U-shaped gutter. Therefore, if the vertical position adjustment device 3 is arranged at least on the flat portion of the U-shaped gutter bottom plate 4, it will be easier to form a bottomed hole when manufacturing the U-shaped gutter (because the upper surface of the square hole with bottomed hole mold 14 shown in Figure 3 is flat). Furthermore, when the center of gravity positions M and N are positioned as close to the side wall as possible, the front of each bolt 10 is closer to both side surfaces 5, 5 compared to the position shown in Figure 8, so that when concrete is poured into the side portions of the U-shaped gutter bottom slab 4 and the underside of the side portions of the bottom slab 4, the concrete poured into the front of each bolt 10 reaches all the way, and if each bolt is made of metal, corrosion due to rust can be prevented.

[0055] In addition, a vertical position adjustment device is placed at or near the center of gravity L as shown in Figure 10, and a vertical position adjustment device is placed at or near the center of gravity M and center of gravity N, but vertical position adjustment devices may also be placed at positions symmetrical about the center line E-E (water flow direction) on the bottom slab 4 between both side walls 5, 5, such as center of gravity L', center of gravity M', center of gravity N', or near the center of gravity. Installation is performed by first adjusting the vertical directions of the vertical position adjustment device placed at or near the center of gravity L and the vertical position adjustment devices placed at or near the center of gravity M and center of gravity N, respectively, to install them in the correct installation position, and then screwing in the bolts that constitute the vertical position adjustment device placed at or near the center of gravity L' and the vertical position adjustment devices placed at or near the center of gravity M' and center of gravity N', respectively, until they hit the foundation surface 2, allowing the U-shaped gutter 1 to be installed in a more stable state. Similarly, in the placement position of the vertical position adjustment device shown in Figure 8, a vertical position adjustment device can be added and placed at each center of gravity position or near the center of gravity position that is symmetrical across the bisector F-F, which bisects the center line E-E (water flow direction) on the bottom slab 4 between both side walls 5, 5.

[0056] When installing the U-shaped gutter 1, the U-shaped gutter is placed with the center of gravity M and center of gravity N sides, which are on either side of the bisector F-F that bisects the water flow direction E'-E' of the U-shaped gutter, facing the level line, and the bolts of each of the vertical position adjustment devices provided at center of gravity M and center of gravity N are gradually unscrewed to bring the top end 50 of the U-shaped gutter closer to the level line 51, and then the bolt of the vertical position adjustment device provided at center of gravity L is gradually unscrewed to create a horizontal plane including the level line 51, and the U-shaped gutter is installed in its fixed position while repeatedly fine-tuning each nut of each vertical position adjustment device.

[0057] In the above-mentioned U-shaped gutter, the vertical position adjustment devices 3 are arranged in three places on the U-shaped gutter bottom slab 4 in order to bring the top end of the U-shaped gutter closer to the level line and then make it easier to obtain a horizontal plane including the level line. However, in the case of a large U-shaped gutter or box culvert that is heavier, the sidewall direction of the U-shaped gutter or box culvert may be divided into several equal parts, and the vertical position adjustment devices 3 may be arranged at symmetrical positions on either side of the center line E-E between the both side walls of the U-shaped gutter bottom slab 4. For example, as shown in FIG. 11, the sidewall direction of the U-shaped gutter may be divided into three equal parts by the equal part F-F and the equal part F'-F', and one of the three equal parts may be arranged on either side of the center line E-E. A U-shaped groove may also be considered in which vertical position adjustment devices are arranged at symmetrical positions Oa, Ob, Pa, Pb, and Qa, Qb on each of the equal dividing lines S-S that divide the one end 57a, the central portion 57b, and the other end 57c in a direction perpendicular to the center line E-E between the both side walls, and which are sandwiched between the center line E-E between the both side walls.Furthermore, a U-shaped groove may also be considered in which vertical position adjustment devices are added to the intersections Ra, Rb between each of the equal dividing lines F-F and F'-F' that divide the center line E-E between the both side walls of the U-shaped groove in thirds and the center line E-E between the both side walls, so that the central axes of the female threads of the nuts that constitute the vertical position adjustment devices coincide with each other.

[0058] Also, as shown in Fig. 2, a U-shaped gutter or box culvert may be provided with a protruding portion 18 on each of the outer lower portions 5a, 5a of both side walls 5, 5 of the U-shaped gutter 1, and a plurality of vertical position adjustment devices (enlarged cross-sectional view of the main portion shown in Fig. 1) arranged along the direction of the side wall 5 on both protruding portions 18, so that the central axis of the female screw 6 of the nut 7 constituting the vertical position adjustment device 3 faces the same direction as the vertical direction of the U-shaped gutter 1 (G-G shown in Fig. 2), and the load is evenly applied to multiple points on the U-shaped gutter bottom plate 4. By providing multiple points on the outer lower portions of both side walls of the U-shaped gutter or box culvert, the bolts constituting each vertical position adjustment device can be adjusted from the outside, making it easy to adjust the vertical position of the U-shaped gutter or box culvert. Furthermore, in large U-shaped gutter or box culvert, which is heavier, the position of the vertical position adjustment device 3 shown in Fig. 2 and the position of the vertical position adjustment device 3 shown in Fig. 8 can be combined to accommodate the weight.

[0059] When installing large U-shaped gutters or box culverts, which are heavier, on the foundation surface 2, the U-shaped gutters or box culverts can be lifted using heavy machinery such as a crane or lift rollers, and the protruding amounts of each bolt that constitutes each vertical position adjustment device can be adjusted appropriately in advance. Installation can then be attempted on the foundation surface once, and the gutter or box culvert can be lifted again and installed on the foundation surface while adjusting the protruding amounts of the bolts.

[0060] (Second embodiment) (U-shaped groove embodiment) It is also possible to consider a U-shaped gutter 1 with a load distribution plate, in which a load distribution plate 60 for distributing the load from the U-shaped gutter body is attached in a swivel state to the tip of the bolt that constitutes each of the above-mentioned up-down position adjustment devices, and this is described below.

[0061] The U-shaped gutter 1 with load distribution plate is installed on the foundation concrete, which is poured after the foundation stone is sufficiently compacted by a roller. This eliminates the need for leveling mortar (however, leveling mortar may be applied on the foundation concrete). The vertical position adjustment devices 3 are arranged at three locations on the bottom slab 4 shown in FIG. 7, namely, the center of gravity A, center of gravity B, center of gravity C, or near the center of gravity, and the load distribution plate is attached to the tip of the bolt constituting the vertical position adjustment device 3 in a swivel state. The load distribution plate may also be attached to the tip of the bolt constituting the other vertical position adjustment device 3 in a swivel state.

[0062] The planar shape of the load distribution plate 60, which is attached in a swivel state to the tip of the bolt 61 constituting the vertical position adjustment device 3 in order to distribute the load from the U-shaped gutter body, can be round, square, rectangular, etc., and costs can be reduced by making them all the same shape and size. In addition, in a case where the vertical position adjustment devices are arranged at the center positions B and C of gravity that are symmetrical across the center line E-E between the both side walls of the U-shaped gutter body, as in the U-shaped gutter 1 shown in Figure 8, it is possible to provide independent load distribution plates at the tips of the bolts 61, or to provide a single load distribution plate, for example, rectangular or elliptical, that is attached to the tips of each bolt 61 in a shared state.

[0063] The part where the load distribution dish 60 is attached in a swivel state to the tip of the bolt 61 is shaped into a notched protruding portion 63 so that the load distribution dish 60 fits into the uneven foundation surface 62, as shown in Figure 12, and the central part of the load distribution dish 60 facing the protruding portion 63 is shaped into a sunken spherical crown-shaped portion 64, and the spherical crown-shaped portion 64 slides against the protruding portion 63 to adjust the load distribution dish 60 to the optimal orientation to fit the uneven foundation surface 62 on the foundation concrete.

[0064] Furthermore, in order to attach the load distribution plate 60 to the tip of the bolt 61 in a swivel state, a cylindrical protrusion 65 that serves as a neck is provided in the center of the spherical protrusion 63 at the tip of the bolt 61 that is protruded in a spherical notch shape, and a hole 66 is opened in the center of the spherical crown-shaped portion that is recessed in the center of the load distribution plate 60 so that the center of the load distribution plate 60 fits into the cylindrical protrusion 65, and the hole 66 is fitted into the cylindrical protrusion 65 that serves as the neck. In the case where the load distribution plate 60 is made of metal and the square bolt is screwed into a U-shaped groove in which the support portion to which the nut is fixed is integrated with the concrete, the square bolt that has been screwed in beforehand is opened in the center of the spherical crown-shaped portion that is recessed in the center of the load distribution plate 60 so that the center of the load distribution plate 60 fits into the cylindrical protrusion 65. The load distribution plate 60 is fitted into the cylindrical protrusion 65 at the end of the bolt, and the tip of the protrusion 65 is crimped to attach the load distribution plate 60 to the bolt tip in a swivel state, and when the load distribution plate 60 is made of metal and a square socket bolt without a head is used, the load distribution plate 60 is fitted into the cylindrical protrusion 65 of the square socket bolt in a single body state, the cylindrical protrusion 65 is crimped to attach the load distribution plate 60 to the bolt tip in a swivel state, and then the square socket bolt with the load distribution plate 60 attached in a swivel state is screwed into the square hole side of the square socket bolt from the underside of the U-shaped groove bottom plate 4 to attach it to the U-shaped groove. Furthermore, when the bolt is made of plastic, a heated iron is pressed against the tip of the cylindrical protrusion 65 that becomes the neck of the notched protrusion to deform it, and the load distribution plate is attached to the bolt tip in a swivel state so that it does not come off.

[0065] If the U-shaped gutter with load distribution plate 1, with the load distribution plate 60 attached in a swivel position to the tip of the bolt 61, is stored upside down in a stockyard as shown in Figure 13, it is advisable to provide a concrete protrusion integrated with the U-shaped gutter on the underside of the bottom plate of the U-shaped gutter with load distribution plate so that the top surface of the bottom plate 4 of the U-shaped gutter with load distribution plate 1 to be stacked next does not come into direct contact with the load distribution plate.For example, the two rows of protrusions 67a, 67b shown in Figure 13 are provided in the horizontal direction (orthogonal to the water flow direction if the water flow direction is vertical) on the underside of the bottom plate of the U-shaped gutter with load distribution plate so as to avoid the load distribution plate.

[0066] Therefore, the height of the linear protrusions 67a, 67b is set to a height such that the upper surface of the bottom plate 4 of the next U-shaped gutter 1 with load distribution plate to be stacked does not come into direct contact with the load distribution plate.

[0067] In addition, when the U-shaped gutter body with load distribution plate, which is equipped with a load distribution plate attached in a swivel state to distribute the load from the U-shaped gutter body at the tip of the bolt, is relatively light and small, a conceivable method of installation is to thoroughly compact the laid foundation stone with a roller, and directly lay a sheet (such as a plastic material) to prevent concrete absorption without pouring foundation concrete on the surface of the foundation stone, and then directly install the U-shaped gutter body with load distribution plate 1 on the sheet. When this method is adopted, Because it is relatively light and small, the use of a load distribution plate allows the main body of the U-shaped gutter with load distribution plate 1 to be installed directly on the surface of the foundation quarry stone, and after the installation of the U-shaped gutter 1 main body, installation can be completed by pouring concrete between the top surface of the foundation quarry stone and the underside of the side slab of the U-shaped gutter with load distribution plate 1.As a result, it is possible to omit the work of applying foundation concrete and leveling mortar to the foundation quarry stone laid opposite the bottom slab of the U-shaped gutter with load distribution plate 1, and the leveling of the leveling mortar, which leads to savings in construction time and costs.

[0068] The reason for laying the sheet is that after the U-shaped gutter 1 with load distribution plate is installed, the tips of the bolts protruding from the bottom plate of the U-shaped gutter 1 and the load distribution plate are firmly integrated by pouring concrete, and an anti-absorption sheet is laid to prevent the poured concrete from being absorbed by the foundation quarry.

[0069] In addition, in the case of a foundation quarry where a sheet for preventing concrete absorption is laid on the surface of the above-mentioned foundation quarry and a U-shaped gutter with a load distribution plate 1 is directly installed on top of it, in order to prevent the foundation quarry from collapsing due to the weight of the installed U-shaped gutter 1, before laying the foundation quarry, the soil in the area where the foundation quarry will be laid is excavated (or piled up on both sides of the laid foundation quarry), and the foundation quarry is laid in the excavated area and thoroughly compacted with a roller, and further, a space is left between the sheet laid on the surface of the foundation quarry and the underside of the bottom plate of the U-shaped gutter with a load distribution plate 1 (the tip of the bolt protruding from the bottom plate of the U-shaped gutter 1 and the load distribution plate part) so that concrete can enter when it is poured.

[0070] The method of directly installing a U-shaped gutter with load distribution plates, in which load distribution plates are attached to the tip of each bolt in a swivel state, on the foundation surface where a sheet is laid on the foundation stone described above is suitable for a free-gradient U-shaped gutter in which the slope can be freely determined by providing an opening in the bottom plate part of the U-shaped gutter, and after installing the free-gradient U-shaped gutter using the above-mentioned installation method, pouring invert concrete from the opening of the bottom plate part can give the bottom plate part a slope that is arbitrarily set, and the periphery of each bolt and the load distribution plates attached to the tip of each bolt in a swivel state can be filled with invert concrete to fix it. In addition, when installing a free-gradient U-shaped gutter, a construction method is also possible in which a sheet for preventing concrete absorption is not laid on the foundation stone, but the free-gradient U-shaped gutter is installed directly on the foundation stone, and invert concrete is poured from the opening of the bottom plate part, so that the foundation stone and the invert concrete are in close contact with each other, thereby increasing the strength.

[0071] Furthermore, when a U-shaped gutter with a load distribution plate, which has a load distribution plate attached to the end of the bolt in a swiveling state, is relatively heavy and large, a method of installing the foundation stone laid down can be considered, in which the foundation concrete is poured on the surface of the foundation stone by a rolling machine, and the U-shaped gutter 1 is directly installed on the foundation concrete. If this method is adopted, the load from the U-shaped gutter with a load distribution plate 1 is distributed and applied to the foundation concrete by the use of the load distribution plate, so the U-shaped gutter with a load distribution plate 1 can be installed on the foundation concrete in a stable state, and the installation can be completed by pouring concrete between the top surface of the foundation concrete and the lower side slab of the U-shaped gutter with a load distribution plate 1. Therefore, the foundation concrete and leveling mortar in the center of the bottom slab of the U-shaped gutter with a load distribution plate 1 and the leveling work of the leveling mortar can be omitted (however, leveling mortar may be applied on the foundation concrete). In addition, in various precast reinforced concrete secondary products such as U-shaped gutters and box culverts equipped with the above-mentioned vertical position adjustment devices, by providing an opening in the bottom slab and pouring invert concrete through the opening, various precast reinforced concrete secondary products such as U-shaped gutters and box culverts can be securely installed on the foundation surface.

[0072] Furthermore, an embodiment can be considered in which the above-mentioned vertical position adjustment device is adopted for an FTL type waterway in which the side walls and bottom slab form an L shape in a precast reinforced concrete secondary product used in places where construction on only one side is not possible or where an integrated product cannot be brought in, and this is described below.

[0073] (Third embodiment) (EMBODIMENT OF FT-L TYPE WAVE CONDITION) As shown in Fig. 14, the FTL waterway 70 of the present invention is configured such that a sidewall 71 and a bottom slab 72 form an L shape, a continuous footing overhanging part 73 is formed on the lower part of the sidewall 71 opposite to the bottom slab 72, and vertical position adjustment devices are provided at multiple locations at the positions of arrows h and i along the sidewall 71 direction on the bottom slab 72 and the continuous footing overhanging part 73. For example, the central axis of a female screw threaded into a high nut formed into a truncated pyramid shape as shown in Fig. 4(a) or a high nut formed into a truncated prism shape with a flange as shown in Fig. 4(b) is arranged in multiple locations facing the same direction as the vertical direction of the FTL waterway 70. Furthermore, with regard to the height of the continuous footing extension portion 73 formed on the opposite side of the base slab 72 across the side wall 71, a height can be sufficiently ensured to correspond to a high nut formed in a truncated pyramid shape or a high nut formed in a truncated column shape by providing a flange, and it is possible to consider cases in which the height of only the part where the high nut is integrated is ensured, or cases in which the height of the entire continuous footing extension portion is made the same as the height of the high nut.

[0074] When installing the FTL-type waterway 70, the FTL-type waterway 70 is lifted up in a predetermined, accurate installation position (for example, a position aligned with the level line) using a lift roller method or the like, and the square socket bolt shown in Figure 4(b) which is screwed into the female threads of the high nuts that constitute the vertical position adjustment devices 3 on the bottom slab 72 side and the footing extension side 73 of the FTL-type waterway 70 is screwed in to protrude, and the tightening torque of the square socket bolt which has been screwed in until it hits the foundation surface is suddenly increased to the position where the FTL-type waterway has been installed in the accurate installation position of the FTL-type waterway.

[0075] Furthermore, after installing a predetermined number of FTL-type waterways 70 on one side and then installing a predetermined number of FTL-type waterways on the other side, the waterway is completed by connecting the central part that will become the bottom slab between the FTL-type waterway bottom slabs on one side and the FTL-type waterway bottom slabs on the other side with cast-in-place reinforced concrete.

[0076] In addition to the above-mentioned FTL-type waterways, box culverts and arch culverts may also be provided with a continuous footing projection on the lower outer side of both side walls, and the continuous footing projection may be provided with vertical position adjustment devices at multiple locations along the same direction as the side wall, or the bottom slab of the box culvert or arch culvert may be provided with vertical position adjustment devices at multiple locations along the same direction as the side wall, or box culverts and arch culverts may be provided with vertical position adjustment devices at multiple locations between the footing projection and the bottom slab of the box culvert or arch culvert.

[0077] In addition, when the vertical position adjustment devices are provided at a plurality of locations in the same direction as the side wall direction in the continuous footing overhanging portion, as shown in FIG. 14, the height of the concrete portion of the continuous footing overhanging portion where the high nuts constituting the vertical position adjustment devices are arranged and integrated can be sufficiently secured, so that the length of the female thread of the high nut, for example, formed in a truncated pyramid shape or the high nut formed in a trapezoidal column shape with a flange around the lower end, which is integrated into the continuous footing overhanging portion, can be sufficiently secured, and the overall length of the male thread of the socket bolt (which may be a square bolt with a large two-face width) screwed into each high nut can be secured, so that the contact area between the female thread of the high nut formed in a truncated pyramid shape or the high nut formed in a trapezoidal column shape with a flange around the lower end integrated into the footing overhanging portion and the male thread of the socket bolt can be made large, and as a result, the strength against the load from a large box culvert or arch culvert, which becomes heavier, can be increased. Also, similar to the above-described embodiment, the high nuts forming a truncated pyramid shape or the high nuts forming a truncated prism shape with a flange at the lower end, and the square socket bolts screwed into the female threaded portions of the high nuts may be made of metal or strong plastic (such as recycled plastic).

[0078] Then, the vertical position adjustment device is fixed within the formwork in a manner similar to that of the above-described embodiment, and then concrete is poured into the formwork. After the concrete has hardened, the concrete and each high nut are integrated together, and then the formwork is removed, resulting in a precast reinforced concrete secondary product such as an FTL-type waterway equipped with a vertical position adjustment device.

[0079] In the above-described embodiments, the vertical position adjustment device is provided only on U-shaped gutters, FTL-type channels, box culverts, and arch culverts among precast reinforced concrete secondary products. However, embodiments in which the vertical position adjustment device is provided on other precast reinforced concrete secondary products (e.g., FT-type channels) are also contemplated, not limited to the U-shaped gutters, FTL-type channels, box culverts, and arch culverts.

[0080] In each of the above-mentioned vertical position adjustment devices, a nut or a high nut with an internal thread is fixed integrally to the main body of a precast reinforced concrete secondary product, and a square bolt or a square socket head bolt screwed into the internal thread of the nut or high nut can be screwed in and out to move the precast reinforced concrete secondary product in the vertical direction. In addition to these vertical position adjustment devices, a wedge-type vertical position adjustment device in which two wedges are combined in opposite directions like a Z-shape, as in the third embodiment shown in Figures 15 to 17, can also be considered. The wedge-type vertical position adjustment device can be used not only for concrete secondary products, but also when installing machines and equipment, and will be described below.

[0081] (Fourth embodiment) (Embodiment of wedge-shaped up / down position adjustment device) The wedge-shaped up / down position adjustment device 80 has a continuously enlarged guide groove (hereinafter referred to as guide groove) 83 recessed along the inclination direction of the slope 81c of the wedge-shaped fixed base 81 with guide groove as shown in Figure 15, and a protrusion 84 (having a cross-sectional shape such as an inverted triangular shape, inverted T-shape, circular shape, etc.) having a cross-sectional shape that slides along the guide groove 83 and forms a flared shape along the inclination direction of the slope 82b of the wedge-shaped movable part 82 shown in Figure 15 facing the slope 81c.The wedge-shaped fixed base 81 with guide groove and the wedge-shaped movable part 82 are arranged in opposite directions like a Z shape, and the protrusion 84 of the wedge-shaped movable part 82 is inserted into the guide groove 83 of the wedge-shaped fixed base 81 with guide groove and fitted together in a slidable state.

[0082] Figure 16 Furthermore, in order to make it easier to drive the wedge head 82d into the wedge-shaped movable part 82 with a mallet or hammer, as shown in FIG. 16 , it is preferable to form the head 82d of the wedge-shaped movable part 82 to extend further outward from the thin tip 81a of the guide grooved wedge-shaped fixed base 81 when the positions of both end portions of the wedge head 81d side of the guide grooved wedge-shaped fixed base 81 and the thin tip 82a side of the wedge-shaped movable part 82 are aligned, and when returning the wedge-shaped movable part 82 that has been driven in too far, it is easier to return it by forming a recess 82e into which a finger can be inserted on the upper surface 82c on the wedge head 82d side.

[0083] In addition, when the wedge-shaped vertical position adjustment device 80 is positioned at the intersections Ra, Rb of the equal division lines F-F and F'-F' and the center line E-E between the both side walls in the U-shaped gutter 1 shown in Figure 11, it is possible that a mallet or hammer may not be able to reach the wedge head 82d.As a countermeasure, it is possible to prepare several types of removable extension rods that can be fitted into the wedge head 82d of the wedge-shaped movable part 82 and have a length that protrudes outside the projection surface of the U-shaped gutter 1, and after fitting the extension rod into the wedge head 82d to adjust the vertical position, the extension rod can be pulled out and, if necessary, fitted into the wedge head 82d again for reuse.

[0084] The guide groove 83 recessed into the slope 81c of the wedge-shaped fixed base 81 with guide groove is fitted into the guide groove 83 in a state in which the protrusion portion 84 of the wedge-shaped movable part 82 can slide in the inclined direction of the slope 81c, and in order to prevent the protrusion portion 84 from coming off the guide groove 83, the width M of the opening is set narrower than the width L of the sliding surface 83a of the guide groove 83, as shown in the horizontal cross-sectional view of a certain position in the wedge-shaped vertical position adjustment device 80 shown in Figure 17 (where the wedge-shaped movable part 82 has already been inserted and assembled into the wedge-shaped fixed base 81 with guide groove).

[0085] Furthermore, the included angle α of each wedge tip in the wedge-shaped fixed base 81 with guide groove and the wedge-shaped movable part 82 is set to the same angle, and therefore, in the wedge-shaped vertical position adjustment device 80 in which the wedge-shaped fixed base 81 with guide groove and the wedge-shaped movable part 82 are combined, the lower surface 81b of the wedge-shaped fixed base 81 with guide groove and the upper surface 82c of the wedge-shaped movable part 82 form a parallel surface, as shown in Fig. 16. Also, the wedge-shaped vertical position adjustment device may be such that, in the combined state of the wedge-shaped fixed base with guide groove and the wedge-shaped movable part, the thin tip side of the wedge-shaped movable part is formed slightly downward in front (towards the driving direction of the wedge-shaped movable part).

[0086] The contact surfaces of the wedge-shaped fixed base 81 with guide groove and the wedge-shaped movable part 82 facing each other may be provided with an uneven surface so that the secondary concrete product, machinery, equipment, etc. are less likely to move due to their own weight after the wedge-shaped movable part 82 is driven in. Furthermore, a combination may be used in which a guide groove is not provided on the wedge-shaped fixed base with guide groove, but is provided on the wedge-shaped movable part side, and a protruding part provided on the wedge-shaped fixed base with guide groove slides on the guide groove on the wedge-shaped movable part side. It is also advisable to indicate the load-bearing capacity per wedge at least on the wedge-shaped movable part 82 side, since this will allow the number of wedges required per secondary concrete product, machinery, equipment, etc. to be known.

[0087] When using the wedge-shaped vertical position adjustment device 80 to install a secondary concrete product, machine, device, etc. in a fixed position on the foundation surface 2, the thin tip portion 81a of each guide grooved wedge-shaped fixing base 81 is directed toward the outside of the projection surface of the secondary concrete product, machine, device, etc., and a concrete nail or double-sided tape is used (when fixing with a concrete nail, a concrete nail hole is opened in advance on the side of the guide grooved wedge-shaped fixing base 81. When fixing with double-sided tape, a concrete nail hole is opened in advance on the side of the guide grooved wedge-shaped fixing base 81. When fixing with double-sided tape, a concrete nail hole is opened in advance on the side of the guide grooved wedge-shaped fixing base 81. (The same applies below) the wedge-shaped up / down position adjustment device 80 is placed and fixed in a fixed position on the foundation surface 2 with an adhesive or the like, then the secondary concrete product, machinery, equipment, etc. are placed on the upper surface 82c of the wedge-shaped movable part 82, and further the wedge-shaped movable part 82 sliding in the guide groove 83 of each guide-groove-equipped wedge-shaped fixed base 81 is driven in with a mallet, hammer, etc. to align the secondary concrete product, machinery, equipment, etc. with the level line and with the horizontal plane including the level line, whereby the secondary concrete product, machinery, equipment, etc. can be installed.

[0088] In detail, when the secondary concrete product, machine, equipment, etc. is lightweight, the thin tip portion 81a of the guide grooved wedge-shaped fixed base 81 is directed toward the outside of the projection plane of the secondary concrete product, machine, equipment, etc., on the base surface of the fixed position on which the secondary concrete product, machine, equipment, etc. is to be installed, and the multiple wedge-shaped vertical position adjustment devices 80 are arranged and fixed with concrete nails, double-sided tape, adhesive, etc., and then, when the secondary concrete product, machine, equipment, etc. is installed on the upper surface 82c of the wedge-shaped movable portion constituting each wedge-shaped vertical position adjustment device, the secondary concrete product, machine, equipment, etc., is placed on the horizontal plane including the level line. In order to install the secondary concrete product, the wedge-shaped movable parts are fine-tuned in advance to make the height of the upper surfaces 82c of the wedge-shaped movable parts 82 uniform, and then the secondary concrete product, machinery, equipment, etc. are placed directly on the upper surfaces of the wedge-shaped movable parts. Then, each wedge-shaped movable part is gradually driven in with a hammer or mallet to align it with the level line and to the horizontal plane including the level line, and a lever or the like is used in combination to align the top edge of the secondary concrete product, machinery, equipment, etc. with the level line and bring it closer to the plane including the level line, and fine adjustments can be made so that the secondary concrete product, machinery, equipment, etc. can be installed.

[0089] In the case of large concrete products, machines, equipment, etc. that are heavy, the thin tip portion 81a of the guide grooved wedge-shaped fixed base 81 is directed toward the outside of the projection surface of the concrete product, machine, equipment, etc. on the side of the foundation surface 2 on which the foundation frame of the concrete product, machine, equipment, etc. is installed, and multiple wedge-shaped vertical position adjustment devices 80 are arranged and fixed within the projection surface of the large concrete product, machine, equipment, etc. using concrete nails, double-sided tape, adhesive, etc., and then the upper surfaces of the wedge-shaped movable parts that constitute each wedge-shaped vertical position adjustment device 80 are Then, above the fixed wedge-shaped vertical position adjustment device 80, several heavy machinery such as jacks, cranes, lift rollers, etc. are used to push the secondary concrete product, machinery, equipment, etc. up to the exact installation position, and then the secondary concrete product, machinery, equipment, etc. are installed on the upper surface of the wedge-shaped movable part, and the wedge-shaped movable part is driven in with a hammer or mallet, etc., until it becomes difficult to drive in the wedge-shaped movable part or the sound when driving it in changes, which is the installation position. Furthermore, by using a lever or the like in combination, the reference position of the secondary concrete product, machinery, equipment, etc. is made to coincide with the level line and fine adjustment is made to bring it closer to the plane including the level line, so that the secondary concrete product, machinery, equipment, etc. can be installed in the fixed position.

[0090] Furthermore, in the case of a secondary concrete product, in order to fix it to the foundation surface 2, after adjusting the upper surfaces of the wedge-shaped movable parts that make up each wedge-shaped vertical position adjustment device 80 to be on the same horizontal plane, a mortar mixture of sand and concrete cement is spread and leveled inside each wedge-shaped vertical position adjustment device 80 so that it forms the same horizontal plane as the upper surfaces of the wedge-shaped movable parts, and further, after installing the secondary concrete product, mortar or the like is packed between the bottom surface of the secondary concrete product and the foundation surface 2.

[0091] In the above-mentioned wedge-shaped vertical position adjustment device 80, in the conventional vertical position adjustment using a single wedge, the contact part between the upper surface of the single wedge and the lower surface of the secondary concrete product, machine, device, etc. is in approximately line contact, whereas the upper surface 82c of the wedge-shaped movable part 82 constituting the wedge-shaped vertical position adjustment device 80 is in surface contact with the lower surface of the secondary concrete product, machine, device, etc., and between the slope 81c of the guide grooved wedge-shaped fixed base 81 and the sliding surface 83a of the guide groove 83 and the slope 82b of the wedge-shaped movable part 82 and the lower surface 84a of the protruding part 84, so that the load of the precast reinforced concrete secondary product, machine, device, etc. is distributed and it is easy to drive the wedge-shaped movable part 82. Furthermore, the wedge-shaped vertical position adjustment device 80 can be made of metal other than plastic.

[0092] (Fifth embodiment) (Embodiment of parallel wedge-shaped vertical position adjustment device) As a modified example of the wedge-shaped vertical position adjustment device 80, as shown in modified example 1 in FIG. 18, a parallel wedge-shaped vertical position adjustment device 80c may be considered, in which a plurality of guide grooves 86, 86 are recessed in parallel in the inclination direction of the slope 85c of the sloped surface 85c of a guide-groove wedge-shaped fixed base 85, and a wedge-shaped movable part 87, 87 is fitted into each of the plurality of guide grooves 86, 86. In the case of this parallel wedge-shaped vertical position adjustment device 80c, a plurality of wedge-shaped vertical position adjustment devices 80c are arranged and fixed within the projection surface of a large secondary concrete product, machine, equipment, etc., and then one of the wedge-shaped movable parts 87, 87 is driven in with a mallet or hammer, etc., so that the secondary concrete product, machine, equipment, etc. is lifted, making it easier to drive in the other wedge-shaped movable part to be driven in next, and installation can be easily performed. In addition, in FIG. 18, the wedge-shaped movable parts 87, 87 are adjacent to each other, but the wedge-shaped fixed base 85 with guide groove may be shared, and the intervals between the multiple wedge-shaped movable parts 87, 87 may be increased.

[0093] Furthermore, in each of the above-mentioned wedge-shaped vertical position adjustment devices and parallel wedge-shaped vertical position adjustment devices, unlike the above-mentioned vertical position adjustment devices configured by screwing a bolt into the female thread of a nut, they function independently and are not integrated with the precast reinforced concrete, so their placement position can be set relatively freely. For example, when installing a U-shaped gutter that is heavy enough to be shaken by hand or difficult to do so, a plurality of wedge-shaped vertical position adjustment devices and parallel wedge-shaped vertical position adjustment devices can be placed and fixed to the base surface in a fixed position where the U-shaped gutter will be installed, with the thin tip of the wedge-shaped fixed base with guide groove facing outward within the projection surface of the U-shaped gutter using concrete nails, double-sided tape, adhesive, etc., and then the U-shaped gutter can be placed on the top surface of the wedge-shaped movable part, and the wedge-shaped movable part can be driven in with a mallet or hammer, and the top edge of the U-shaped gutter can be adjusted to be horizontal including the level line using a lever or the like before installation.

[0094] Then, in order to secure a base on the starting line side of the U-shaped gutter to be installed subsequent to the U-shaped gutter installed in the accurate position, one or more wedge-shaped vertical position adjustment devices, which have been raised to the extent that they can be inserted between the bottom slab of the connecting surface of the U-shaped gutter to be installed subsequent to the U-shaped gutter installed in the accurate position, are inserted toward the starting line so that a portion of the upper surface of the wedge-shaped movable part that constitutes the wedge-shaped vertical position adjustment device remains, and the wedge-shaped movable part is pressed in with a finger, and then the wedge-shaped movable part is lightly driven in with a mallet or hammer, and the upper surface of the wedge-shaped movable part that remains can be used as a base on the starting line side of the U-shaped gutter to be installed subsequently, allowing the installation work of the U-shaped gutter to be installed subsequently to be carried out smoothly.

[0095] In addition, in cases where it is difficult to drive in the wedge-shaped movable parts, such as large concrete secondary products, machines, devices, etc. that become heavier, the thin tip of the guide grooved wedge-shaped fixed base constituting each wedge-shaped vertical position adjustment device is placed and fixed in advance on the projection surface of the precast reinforced concrete secondary product, machine, device, etc., facing outward within the projection surface of the foundation surface with a concrete nail, double-sided tape, adhesive, etc., and then the upper surfaces of the wedge-shaped movable parts constituting each wedge-shaped vertical position adjustment device are finely adjusted so that they form the same horizontal plane, and then the concrete secondary product, machine, device, etc. are placed on the upper surface of each wedge-shaped movable part by the jack-up roller method, lift roller method, etc., and if at this point a plane that coincides with the level line and includes the level line is obtained, the concrete secondary product, machine, device, etc. will be installed in the correct position at that position. Also, if it is not installed in the correct position, it is good to hoist the concrete secondary product, machine, device, etc. again and finely adjust the wedge-shaped movable part to install it in the correct position.

[0096] (Sixth embodiment) (Embodiment of wedge-shaped vertical position adjustment device with anchor bolt through hole) In each of the wedge-shaped vertical position adjustment devices described above, which are assembled in opposite directions, as shown in Figs. 19(a) and 19(b), of the guide grooved wedge-shaped fixed base 81 (Fig. 19(a)) and the wedge-shaped movable part 82 (Fig. 19(b)) which constitute the wedge-shaped vertical position adjustment device 80d, an anchor bolt through hole is provided on the guide grooved wedge-shaped fixed base 81 side in a direction perpendicular to the lower surface 81b of the guide grooved wedge-shaped fixed base 81. A wedge-shaped vertical position adjustment device 80d with anchor bolt passage holes can be considered which combines the two and provides a vertical position adjustment device for machines, equipment, etc., with slit 90 provided at a single location or multiple locations in the inclined direction, and further provides a slit 91 opening in the shape of an elongated hole in the inclined direction in wedge-shaped movable part 82 (Figure 19(b)) which slides along guide groove 83 on upper surface 81c of wedge-shaped fixed base with guide groove. This can also be used as a vertical position adjustment device for machines, equipment, etc.

[0097] In the case of the wedge-shaped vertical position adjustment device with anchor bolt through hole 80d which combines the wedge-shaped fixed base with guide groove 81 having anchor bolt through hole 90 opened at a single location or at a plurality of locations in an oblique direction with the wedge-shaped movable part 82 having slits 91 opened therein, the anchor bolt through hole 90 opened at a single location or at a plurality of locations in an oblique direction in the wedge-shaped fixed base with guide groove 81 is appropriately selected, and the appropriately selected anchor bolt through hole 90 and the slit 91 of the wedge-shaped movable part 82 are fitted into the anchor bolt. If the machine or equipment is light, the machine or equipment is directly placed on the upper surface 82c of the wedge-shaped movable part 82 which constitutes the wedge-shaped vertical position adjustment device with anchor bolt through hole 80d, and then each wedge-shaped movable part 82 is gradually driven in with a hammer, mallet or the like until it is aligned with the level line and is installed in the specified position aligned with the horizontal plane including the level line. Furthermore, to prevent any part of the wedge-shaped up / down position adjustment device 80d with anchor bolt through-hole from remaining on the outside of the machine or equipment, the remaining part can be driven circumferentially into the projected surface of the machine or equipment with a hammer or mallet, with the anchor bolt as the center, or the remaining part can be positioned and fixed within the projected surface of the machine or equipment to prevent tripping.

[0098] Furthermore, in the case of large machinery or equipment whose weight increases, an anchor bolt is fitted into an anchor bolt through hole 90 appropriately selected from the anchor bolt through holes 90 opening in the wedge-shaped fixed base 81 with guide groove and into the slit 91 of the wedge-shaped movable part 82, and then the wedge-shaped vertical position adjustment device 80d with anchor bolt through hole is positioned and fixed within the projection surface of the machinery or equipment, and fine adjustments are made in advance so that the upper surfaces of the wedge-shaped movable parts 82 that make up each wedge-shaped vertical position adjustment device 80d are positioned on the same horizontal plane, and then the machinery or equipment is installed on the upper surface of the wedge-shaped movable part, and if the machinery or equipment is aligned with the level line and is aligned on the horizontal plane including the level line, it will be installed in the specified position.

[0099] As described above, by using a vertical position adjustment device constructed by a nut with an internal thread and a bolt screwed into the internal thread of the nut, or a wedge-shaped vertical position adjustment device constructed by combining a wedge-shaped fixed base with a guide groove and a wedge-shaped movable part that slides in the guide groove of the wedge-shaped fixed base with a guide groove, it is possible to easily install precast reinforced concrete secondary products, as well as machines and equipment, in accurate positions on the foundation surface.

[0100] The above description is of the embodiment of the present invention, but is not intended to limit the scope of the present invention, and various modifications can be easily implemented. Also, the present invention includes embodiments that are configured by appropriately combining the components, functions, features, or method steps in each embodiment. [Industrial Applicability]

[0101] By applying the present invention, a precast reinforced concrete secondary product can be obtained that has a vertical position adjustment device for making it possible to adjust the vertical movement of the precast reinforced concrete secondary product, and that allows the precast reinforced concrete secondary product to be easily positioned in the vertical direction and installed. The present invention can be used in the fields of precast reinforced concrete secondary products and the installation of machines and devices. [Explanation of symbols]

[0102] 1...U-shaped gutter, 2...foundation surface, 3,3a,3b,3c,3d,3e...vertical position adjustment device, 4...bottom plate of U-shaped gutter, 5...side wall, 5a...outer lower part of side wall, 6,23...female screw, 7,40...nut, 8...support part, 9,25...male screw, 10,10a,10b,61...bolt, 11...concrete, 12...bottom hole such as conical or cylindrical hole, 13...one outer formwork, 14...bottom hole with square hole, 15...other inner formwork, 16...bending part provided at the end of support part, 17...square hole in bottom hole with square hole, 18...U-shaped gutter tensioner a metal nut having a truncated pyramidal shape; a metal nut having a truncated column shape; a metal socket head bolt; a cap; a square nut; a plastic nut having a truncated pyramidal shape; a plastic nut having a truncated column shape; a special bolt; a cylindrical portion; a cylindrical portion; a U-shaped groove body having a first end, a second end, a third end, a fourth end, a fifth end, a fifth end, a sixth ... 46c...the other end of the U-shaped gutter divided into three equal parts in the side wall direction, 50...the top end of one side wall of the U-shaped gutter, 51...the level line, 52a...one side of the U-shaped gutter with a weight ratio of 1 out of a weight ratio of 2:1, 52b...the other side of the U-shaped gutter with a weight ratio of 2:1, 57a...one end of the U-shaped gutter divided into three equal parts in the side wall direction and further divided into three, 57b...the center part of the U-shaped gutter divided into three equal parts in the side wall direction, 57c...the other end of the U-shaped gutter divided into three equal parts in the side wall direction and further divided into three, 60...the load distribution plate, 62...the uneven foundation surface, 6 3... spherically-defected convex portion, 64... spherical crown-shaped portion, 65... cylindrical convex portion, 66... ​​hole in the center of the spherical crown-shaped portion, 67a, 67b... convex portion, 70... FTL-type waterway, 71... side wall of FTL-type waterway, 72... bottom plate of FTL-type waterway, 73... continuous footing overhang of FTL-type waterway, 80... wedge-shaped up / down position adjustment device, 81... wedge-shaped fixed base with guide groove, 81a... thin tip of wedge-shaped fixed base with guide groove, 81b... lower surface of wedge-shaped fixed base with guide groove, 81c... slope of wedge-shaped fixed base with guide groove, 81d... wedge head, 82,87...wedge-shaped movable part, 82a...thin tip of the wedge-shaped movable part 82, 82b...slope of the wedge-shaped movable part, 82c...upper surface of the wedge-shaped movable part, 82d...head of the wedge-shaped movable part, 82e...recess for inserting finger, 83...continuously enlarged guide groove, 83a...sliding surface of the continuously enlarged guide groove, 84...projection portion forming a flared shape, 84a...lower surface of the flared shape, 85...wedge-shaped fixed base with guide groove, 85c...slope of the wedge-shaped fixed base with guide groove, 86...guide groove, 90...anchor bolt through hole, 91...slit.

Claims

1. This U-shaped gutter is characterized by having up-down position adjustment devices at multiple locations on the bottom plate or the outer lower part of the side wall of the U-shaped gutter, or on both the bottom plate and the outer lower part of the side wall, to enable the U-shaped gutter body to be moved and adjusted in the up-down direction relative to the foundation surface on which the U-shaped gutter body is installed.

2. A U-shaped gutter as described in claim 1, characterized in that a vertical position adjustment device is configured by fixing a nut with a female thread to a support part and screwing a bolt with a male thread into the nut, the vertical position adjustment device being arranged at multiple locations on the bottom plate of the U-shaped gutter so that the central axis of the female thread of the nut that constitutes the vertical position adjustment device faces in the same direction as the vertical direction of the U-shaped gutter, the support part that constitutes the vertical position adjustment device is fixed to the concrete, and a bottomed hole such as a conical or cylindrical hole is formed in the bottom plate of the U-shaped gutter to allow the bolt screwed into the nut that constitutes the vertical position adjustment device to be screwed in and out from the top side of the U-shaped gutter bottom plate using a tool such as a wrench.

3. A method of manufacturing a U-shaped gutter as described in claim 2, characterized in that, when manufacturing a U-shaped gutter, a square hole with a base mold made of a plastic material or the like is screwed and fixed to the end of a bolt fixed to a predetermined position inside one of the outer formwork, the support part with a nut fixed integrally thereto, so that a conical or cylindrical bottomed hole is formed in the bottom plate of the U-shaped gutter when it is completed, and the formwork combining the one outer formwork and the other inner formwork is filled with concrete, and after the concrete has solidified, the formwork is removed and the square hole with a base mold is removed.

4. The U-shaped gutter described in claim 1, characterized in that the vertical position adjustment device is configured by screwing a socket bolt into the female threaded portion of a socket high nut that forms a truncated pyramid shape having a height lower than the gap dimension between one outer formwork and the other inner formwork, or a socket high nut that forms a trapezoidal column shape with a flange at its lower end, and is arranged at multiple locations on the outer lower part of the bottom plate or side wall of the U-shaped gutter, or on both the bottom plate and the outer lower part of the side wall, with the central axis of the female thread of the socket high nut that forms the truncated pyramid shape or the socket high nut that forms a trapezoidal column shape with a flange at its lower end facing in the same direction as the vertical direction of the U-shaped gutter, and the outer peripheral surface of the socket high nut that forms the truncated pyramid shape or the socket high nut that forms a trapezoidal column shape with a flange at its lower end is fixed integrally to the concrete.

5. The U-shaped gutter described in claim 1, characterized in that the vertical position adjustment device is configured by screwing a plastic socket bolt into the female thread of a plastic high nut molded in a truncated pyramid shape or a high nut molded in a trapezoidal column shape with a flange around its lower end, and is arranged at multiple locations on the outer lower part of the bottom plate or side wall of the U-shaped gutter, or on both the bottom plate and the outer lower part of the side wall, with the central axis of the female thread of the socket high nut that forms the truncated pyramid shape or the socket high nut that forms a trapezoidal column shape with a flange at its lower end facing in the same direction as the vertical direction of the U-shaped gutter, and the outer peripheral surface of the socket high nut that forms the truncated pyramid shape or the socket high nut that forms a trapezoidal column shape with a flange at its lower end is fixed integrally to the concrete.

6. 2. A U-shaped gutter as claimed in claim 1, characterized in that the vertical position adjustment device is arranged on one side of the U-shaped gutter body, which bisects the center line between both side walls of the U-shaped gutter in a direction perpendicular to the center line between the both side walls, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate being aligned with the center line between the both side walls, and the vertical position adjustment devices are arranged on the other side of the U-shaped gutter body, which bisects the center line between both side walls of the bottom plate in a direction perpendicular to the center line between the both side walls, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate being aligned with the center line of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate, respectively, at symmetrical positions on either side of the center line between the both side walls of the U-shaped gutter body.

7. The U-shaped gutter as described in claim 1, characterized in that the vertical position adjustment device is arranged at the center of gravity of one end of the U-shaped gutter divided into three equal parts in the sidewall direction, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate coinciding with the vertical position adjustment device, and the vertical position adjustment devices are arranged at the joints of the central portion and the other end of the U-shaped gutter divided into three equal parts in the sidewall direction, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate coinciding with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the base plate, respectively, at the respective center of gravity positions or near the center of gravity positions of the joints of the central portion and the other end of the U-shaped gutter divided into three equal parts in the sidewall direction, which are symmetrical across the center line between the both side walls of the U-shaped gutter body.

8. 2. A U-shaped gutter as claimed in claim 1, characterized in that the U-shaped gutter body is divided in two in the water flow direction of the U-shaped gutter at a weight ratio of 2:1, and the vertical position adjustment device is arranged on one side of the U-shaped gutter on the weight ratio 1 side of the 2:1 weight ratio, and at or near the center of gravity on a bisecting line that divides one side of the U-shaped gutter in a direction perpendicular to the water flow direction, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate coinciding with the center of gravity of the vertical position adjustment device; and the U-shaped gutter body is divided in two in the water flow direction of the U-shaped gutter at a weight ratio of 2:1, and the vertical position adjustment device is arranged on the other side of the U-shaped gutter on the weight ratio 2 side of the 2:1 weight ratio, and at or near the center of gravity on a bisecting line that divides the other side of the U-shaped gutter in a direction perpendicular to the water flow direction, with the central axis of the female threaded portion of the nut that constitutes the vertical position adjustment device and is integrated into the substrate coinciding with the center of gravity of the vertical position adjustment device.

9. A U-shaped gutter as described in claims 2, 4, 5, 6, 7 and 8, characterized in that a load distribution dish for distributing load from the U-shaped gutter body is attached in a swivel state to the tip of the bolt that constitutes the vertical position adjustment device.

10. An FTL-type waterway comprising a bottom slab that constitutes an FTL-type waterway and a footing overhang on the opposite side of the bottom slab and the lower part of a side wall, wherein vertical position adjustment devices are arranged at multiple locations on the bottom slab of the FTL-type waterway in the same direction as the side walls that constitute the FTL-type waterway, and wherein vertical position adjustment devices are arranged at multiple locations on the footing overhang in the same direction as the side walls that constitute the FTL-type waterway.

11. A wedge-shaped up / down position adjustment device characterized in that a continuously enlarged guide groove is recessed along the inclination direction of the slope of the wedge-shaped fixed base with guide groove, a protrusion portion with a cross-sectional shape that slides along the inclination direction of the slope of the wedge-shaped movable part is protruded along the inclination direction of the slope of the wedge-shaped fixed base with guide groove and a protrusion portion with a cross-sectional shape that slides along the guide groove and a protrusion portion with a cross-sectional shape that slides along the guide groove and a wedge-shaped movable part are inserted into the guide groove of the wedge-shaped fixed base with guide groove so that the wedge-shaped movable part is assembled in a slidable state.

12. A parallel wedge-shaped vertical position adjustment device characterized in that a plurality of parallel rows of guide grooves with continuous enlarged bottoms are recessed along the inclination direction of the slope of the wedge-shaped fixed base with guide grooves, and a protrusion portion having a cross-sectional shape with a flared shape that slides along the guide grooves is protruded along the inclination direction of the slope of the wedge-shaped movable part, and the thin tip of the wedge-shaped fixed base with guide grooves and the thin tip of each wedge-shaped movable part are facing in opposite directions like a Z-shape, and the protrusion portion protruded along the inclination direction of the slope of the wedge-shaped movable part is inserted into each of the guide grooves formed in parallel rows on the wedge-shaped fixed base with guide grooves, so that each wedge-shaped movable part is assembled in a slidable state.

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