JP2004232431A - Channel block having earth retaining function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a channel block having an earth retaining function which allows an operator to easily and positively bolt and join a main body block and a base block to each other without requiring a forced posture in a wide working space. <P>SOLUTION: A joining pocket 13 into which a fastening tool 40 is obliquely inserted from above is formed in the outer surface of a side wall plate 12, and a joining plate 14 fixed to the side wall plate 12 is arranged in the joining pocket 13 so as to face obliquely upward. Then a nut-type insert member 31 or a bolt-type insert member 32 is embedded in the base block 20 so as to face obliquely downward, and a bolt 33 inserted into a through hole 15 in the joining plate 14 is screwed into the nut-type insert member 31 or a nut 36 is screwed to the bolt-type insert member 32 protruding from the through hole 15. Further the base block 20 is firmly fastened to the joining plate 14 by the fastening tool 40, and then the interior of the joining pocket 13 is filled with a filler 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterway block having a retaining function.
[0002]
2. Description of the Related Art When there is a height difference between a road and a land adjacent to the road, a reinforced concrete waterway block laid at the boundary between the road and the adjacent land has an extension extending laterally. A block for a waterway with a soil retaining function, whose part is integrally formed at the lower part of the block body, is used. This extension is buried in the soil on the road side to prevent the block body from moving to the field side, falling or tilting due to earth pressure (for example, the description in FIG. 7 and the description in paragraph 0002 of Patent Document 1). reference).
[0003]
However, in this conventional block for a channel with a soil retaining function, the extension portion including the reinforcing bar is integrally formed with the block body, so that a dedicated mold is used as a molding form. A frame is required, and the size of the mold is larger than that of a normal mold block for a waterway block having no extension.
Further, the waterway block removed from the formwork needs to be left standing and cured in a stock yard until the required strength is developed, but is unsuitable for stacking due to the presence of the extension portion. Because of the large area occupied, it was necessary to prepare a vast stock yard.
[0004]
In order to solve such a problem, the extension portion is configured as a base block as a separate member from the main body block for the water channel, and the main body block and the base block are separately molded, and then both are bolted and joined. It has been proposed to be integrated.
In this one proposal, a through-hole is formed horizontally in the lower part of the side wall plate of the main body block, a through-hole is formed horizontally in an upright wall at the center of the upper surface of the base block, and the main body block is fixed in the base block fixed at the construction site. Is installed, a bolt is passed through the through-hole of the main body block and the through-hole of the base block, and a nut screwed to the bolt is tightened with a tightening tool to integrate the main body block and the base block (Patent Documents) 1).
[0005]
However, in the waterway block with the earth retaining function, the main block, which is heavy with respect to the base block, is precisely moved while finely adjusting it with mechanical force and human power, so that the through-hole of the base block and the through-hole of the main block are provided. If the positioning is not performed, bolting cannot be started, so that the work of joining and integrating is complicated and time-consuming. In addition, the worker enters the narrow space in the water passage of the main body block, that is, the narrow space between the left and right side wall plates, and it is necessary to perform the bolt tightening work in an unreasonable posture with the body bent, so that the workability is not good.
[0006]
In another proposal, a nut-type insert member is embedded and fixed vertically to the lower surface of the left and right side wall plates of the main body block, and a through hole is formed vertically at the end and intermediate part of the base block. Place the base block on the inverted main body block, screw the bolt into the screw hole of the nut type insert member of the main body block from the through hole of the base block, and tighten the main body block and base block with a tightening tool. They are integrated (see Patent Document 2).
[0007]
However, in this waterway block with earth retaining function, since the heavy main body block is turned upside down and the base block is joined by bolting, both integrated blocks must be reinverted and installed. The entire operation up to installation is complicated and time-consuming.
[0008]
In another proposal, a dovetail-shaped protrusion is formed on the outer surface of the side wall plate of the main body block, and a dovetail-shaped recess is formed on the upper end surface of the standing wall of the base block. When placing the main body block on the skeletal member of the base block fixed at the site, the bottom slab concrete is fitted into the recessed portion so as to wrap the skeletal member that appeared at the bottom opening of the main body block. The recess is filled with cement mortar (see Patent Document 3).
[0009]
However, in this block for a waterway with an earth retaining function, the main body block, which is heavy with respect to the base block, is accurately moved while being finely adjusted by a mechanical force and a human power. Since the alignment with the parts must be performed, the work of joining and integrating is complicated and time-consuming. Further, since there is no portion where the main body block and the base block are joined by bolting, there is a problem in joining strength, and the resistance to earth pressure is low.
[0010]
[Patent Document 1] JP-A-10-292470 [Patent Document 2] JP-A-2001-20367 [Patent Document 3] JP-A-62-16179
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a soil retaining function that can easily and accurately perform bolting and joining of a main body block and a base block in a wide working space outside the main body block with a reasonable posture and with a small labor load. It is to provide a block for a canal.
Another object of the present invention is to provide a block for a waterway with a retaining function that can accurately perform a positioning operation for bolting the main body block and the base block and a position holding after the positioning.
Still another object of the present invention is to provide a block for a waterway with a retaining function, which allows a filling operation of cement mortar or the like to be performed stably and reliably.
[0012]
In order to achieve the above-mentioned object, a block for a waterway with a retaining function according to the first aspect of the present invention protrudes below a main body block 10 having a water passage portion 11 and a side wall plate 12 of the main body block 10. In a block for a waterway with an earth retaining function, comprising a base block 20 joined by bolting
A joining pocket 13 into which a tightening tool 40 for bolt fastening joining is inserted from obliquely above is formed at a lower portion of the outer side surface of the side wall plate 12, and a joining plate 14 fixed to the side wall plate 12 is inclined obliquely upward in the joining pocket 13. A bolt-type insert member 31 or a bolt-type insert member 32 is buried and fixed obliquely downward above the base end of the base block 20, and passed through the through hole 15 of the joining plate 14 from the back side of the joining plate 14. Is screwed into the screw hole portion 34 of the nut-type insert member 31 or the nut 36 is screwed into the screw shaft portion 35 of the bolt-type insert member 32 protruding from the through hole 15 to the back side of the joining plate 14. After fastening the base block 20 to the joining plate 14 with the tool 40, the joining pocket 3 offset by the filling material 16 such as cement mortar.
[0013]
According to the second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a positioning projection 21 is formed in the upper portion of the base end of the base block 20 so as to be fitted into the joining pocket 13 of the main body block 10. The nut-type insert member 31 or the bolt-type insert member 32 is embedded in the portion 21, and the positioning projection 21 is fitted into the joining pocket 13, and the upwardly inclined bottom surface 22 of the positioning projection 21 is downwardly inclined with the joining pocket 13. 17 is set so that the through-hole 15 of the joining plate 14 and the nut-type insert member 31 or the bolt-type insert member 32 are aligned.
According to the third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, anchor bars 18 at both ends are buried in the side wall slab 12 and the joining plate 14 traverses the lower space of the joining pocket 13. So as to hold the filler 16.
[0014]
The joining and assembly of the main body block 10 and the base block 20 can be performed in a manufacturing factory. However, in order to exert the advantages of the present invention, it is optimal to carry out the assembly after transporting to the construction site. Also, when performing on the construction site, it is performed before the main body block is installed on the excavation foundation surface, the method of collectively installing the body block and base block assembly, and the method of installing the main body block on the excavation foundation surface After that, there is a method in which the base block is abutted against the main body block and joined.
[0015]
In any case, in a normal use mode, the base block 20 is buried in the higher side of the land having a height difference, and the movement, the overturn or the inclination of the main body block 10 due to the earth pressure is prevented.
As the channel block of the present invention, not only an open channel type channel block such as a normal type gutter block and a variable slope type gutter block, but also a culvert type channel in which the top wall is not open at all in its entire length. It can be applied to blocks.
[0016]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIGS. 1 to 8, the main body block 10 is an open channel type waterway block of a variable slope side groove block. A combination of bolts 33 is used. In the embodiment shown in FIG. 9, a combination of the bolt member 32 and the nut 36 is used.
[0017]
Both the main body block 10 and the base block 20 are made of reinforced concrete, and the joining plate 14, the nut-type insert member 31, the bolt-type insert member 32, the bolt 33, and the nut 36 are all made of iron. Anchor bars 18 are welded to both ends of the joining plate 14, and the anchor bars 18 are embedded in the thickness of the side wall plate 12 corresponding to the front and rear sides of the joining pocket 13 when the main body block 10 is formed.
The joining plate 14 is formed of an iron plate that is bent in a U-shape in plan view. In order to secure the concrete covering thickness, the pair of wing plates 14 a and 14 b of the joining plate 14 may be embedded in the side wall slab 12.
[0018]
The seating portion of the bolt / nut member in which the through hole 15 of the joining plate 14 is formed is disposed at right angles to the downward inclined bottom surface 17 of the joining pocket 13. The lower part of the overhanging wall surface 13a of the joining pocket 13 is slightly widened to the rear side, so that the bolt 33 and the nut 36 can be easily screwed.
In the illustrated embodiment, the bolted joint is performed at two places before and after, but may be performed at more than three places.
An anchor reinforcing bar 37 is fixed to the nut type insert member 31, and an anchor reinforcing bar 38 is fixed to the bolt type insert member 32.
[0019]
According to the first aspect of the present invention, the joining pocket 13 into which the tightening tool 40 is inserted obliquely from above is formed at the lower portion of the outer surface of the side wall plate 12, and the nut type insert member 31 is formed at the upper portion of the base end of the base block 20. Alternatively, a bolt-type insert member 32 is embedded and fixed diagonally downward, and a bolt 33 passed through the through hole 15 of the joint plate 14 from the back side of the joint plate 14 arranged obliquely upward in the joint pocket 13 is inserted into the nut-type insert member. The screw 36 is screwed into the screw hole 34 or the nut 36 is screwed into the screw shaft 35 of the bolt type insert member 32 projecting from the through hole 15 to the back side of the joining plate 14. Is fastened and fixed to the joining plate 14, so that it can be easily applied in a wide working space outside the main body block 10. It is possible to perform bolting joined easily and accurately with energizing.
In this joining operation, it is not necessary to move the heavy main body block while finely adjusting it with mechanical force and human power. It is sufficient to move and adjust the relatively light base block 20 to adjust the position. It is not necessary to turn the heavy main body block upside down, and only the relatively light base block must be abutted against the main body block, so that the entire operation from installation to joining can be performed easily with less labor load.
Also, since the joining plate 14, bolts 33 and nuts 36, which are usually made of iron, are covered with the cement mortar 16, these joining members are reliably protected from rusting corrosion.
Since the joining pocket 13 is formed on the outer surface of the side wall plate 12 and the bolt / nut member does not appear on the water passage portion 11 side, this joining structure is also applied to an underdrain type channel block. can do.
[0020]
In the invention of claim 2, the positioning projection 21 of the base block 20 is fitted into the joining pocket 13 of the main body block 10, and the upward inclined bottom surface 22 of the positioning projection 21 is placed on the downward inclined bottom surface 17 of the joining pocket 13. At this time, the through hole 15 of the joining plate 14 and the nut-type insert member 31 or the bolt-type insert member 32 are aligned, so that the base block 20 is accurately held at the initial abutting position with respect to the main body block 10, The screwing operation of the bolt 33 and the nut 36 is smoothly performed, and the joining operation can be performed quickly and reliably in a stable state.
[0021]
According to the third aspect of the present invention, the anchor reinforcing bars 18 at both ends are embedded in the side wall plate 12 and the joining plate 14 is provided so as to cross the lower space of the joining pocket 13 and is joined by the filler 16 such as cement mortar. When the filling pocket 13 is made up, the filling material 16 is held by the joining plate 14, so that the sagging of the filling material 16 before setting and hardening can be prevented. The compensation work is performed stably and reliably.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main body block constituting a block for a waterway with a retaining function according to an embodiment of the present invention.
FIG. 2 is a perspective view of a base block which is bolted to the main body block of FIG. 1;
FIG. 3 is a perspective view of a joining plate used for bolting the main body block of FIG. 1 and the base block of FIG. 2;
FIG. 4 is a longitudinal sectional view showing a process of bolting and joining the main body block of FIG. 1 and the base block of FIG. 2;
FIG. 5 is a longitudinal sectional view of a bolted joint between the main body block of FIG. 1 and the base block of FIG. 2;
FIG. 6 is a front view of the completed waterway block with a retaining function.
FIG. 7 is a plan view of the completed waterway block with a retaining function.
FIG. 8 is a cross-sectional view of a joining pocket portion of the completed waterway block with a retaining function.
FIG. 9 is a cross-sectional view corresponding to FIG. 5 in another embodiment of the present invention.
FIG. 10 is a front view of the completed block for a waterway with a retaining function in the embodiment of FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main body block 11 Water passage part 12 Side wall plate 13 Joining pocket 14 Joining plate 15 Through hole of joining plate 16 Filler 17 Downwardly inclined bottom surface 18 of joining pocket 18 Anchor bar 20 Base block 21 Positioning protrusion 22 Positioning protrusion Upward inclined bottom surface 31 Nut-type insert member 32 Bolt-type insert member 33 Bolt 34 Screw hole 35 of nut-type insert member Screw shaft 36 of bolt-type insert member Nut 40 Tightening tool

Claims (3)

A block for a waterway with an earth retaining function, comprising: a main body block 10 having a water passage portion 11; and a base block 20 which is extended to a lower portion of a side wall plate 12 of the main body block 10 and joined by bolting.
A joining pocket 13 into which a tightening tool 40 for bolt fastening joining is inserted from obliquely above is formed at a lower portion of the outer side surface of the side wall plate 12, and a joining plate 14 fixed to the side wall plate 12 is inclined obliquely upward in the joining pocket 13. A bolt-type insert member 31 or a bolt-type insert member 32 is buried and fixed obliquely downward above the base end of the base block 20, and passed through the through hole 15 of the joining plate 14 from the back side of the joining plate 14. Is screwed into the screw hole 34 of the nut-type insert member 31 or the nut 36 is screwed into the screw shaft 35 of the bolt-type insert member 32 protruding from the through hole 15 to the back side of the joining plate 14. After fastening the base block 20 to the joining plate 14 with the tool 40, the joining pocket 3 Retaining function water channel blocks compensated by filler material 16 such as cement mortar. A positioning projection 21 to be fitted into the joining pocket 13 of the main body block 10 is formed on a base end upper portion of the base block 20, and the nut-type insert member 31 or the bolt-type insert member 32 is embedded in the positioning projection 21. When the positioning projection 21 is fitted into the joining pocket 13 and the upward inclined bottom surface 22 of the positioning projection 21 is placed on the downward inclined bottom surface 17 of the joining pocket 13, the through hole 15 of the joining plate 14 and the nut-type insert member are provided. The block for a waterway with a retaining function according to claim 1, wherein the block 31 and the bolt-type insert member 32 are aligned. An anchor reinforcing bar (18) at both ends is embedded in the side wall plate (12), and a joining plate (14) is provided so as to traverse the lower space of the joining pocket (13) to hold the filler (16). The waterway block with a retaining function according to claim 2.

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