JP2007211432A - Box type side-ditch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure having an excellent settlement and level difference restraining effect while attaining rapid and accurate construction without entering private land even in the field close to a public-private boundary. <P>SOLUTION: The length of a cover slab 2 is formed to be equal to the length of a side-ditch body 1, and nut-type inserts 5 are embedded in the front and rear ends of cover mounting parts 4 at the upper end inner side faces of the right and left sidewall slabs 3 of the side-ditch body 1. Cutout parts 6 with a width allowing the appearance of the front and rear ends of the cover mounting parts 4 are formed at four front-rear and right-left corners of the cover slab 2. The front and rear ends of a bottom wall slab 7 of the side-ditch body 1 is provided with male-type joint parts 8 and female-type joint parts 9 restraining the relative vertical and lateral displacement between the adjacent side-ditch bodies 1, 1 by mutual engagement. A connecting metal fitting 10 is fitted into the cutout parts 6, 6 communicating with each other, and bolts 12 are screwed to nut-type inserts 5 from through-holes 11 in the connecting metal fitting 10 to connect the side-ditch bodies 1, 1 to each other. Cement mortar or concrete 13 is filled in the cutout parts 6, 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a joint structure in a cross-section box-type side groove used for a variable gradient side groove, a rainwater storage / penetration side groove, or the like.

In general, the cross-section box-type side groove is constructed by sequentially joining the side groove main bodies having a substantially U-shaped cross section in the length direction and closing the upper surface opening of the side groove main body with a plurality of cover plates. As a joint structure for connecting the side groove main bodies to each other, there is a bolt fastening method using an eccentric seat plate and a connection plate, which is evaluated as useful as a measure for preventing the side groove line from sinking or leveling (patent) Reference 1 and Patent Reference 2).

In this bolt fastening method using the eccentric seat plate, a stopper is provided on the connecting plate at one outer position of the two fastening holes at the front and rear ends of the connecting plate, and two bolts passing through the fastening holes are used. A single stopper type (refer to Patent Document 1) in which the circumferential surface of an eccentric seat plate fitted to one bolt is brought into contact with the stopper when the connection plate is fastened to the front and rear end portions of the side groove body, and the connection plate A stopper is projected on the connecting plate at one outer position of the two fastening holes at the front and rear end portions of the plate and at two locations between the two fastening holes, and the connecting plate is formed by two bolts passing through the fastening holes. There is a double stopper type (refer to Patent Document 2) in which the circumferential surface of an eccentric seat plate fitted to one bolt is brought into contact with the two stoppers when tightening the front and rear ends of the side groove body.

In both the single stopper type and the double stopper type, the nut type insert into which the bolt is screwed is embedded in the outer surface recesses of the front and rear end portions of the left and right side wall plates of the side groove body. In order to fasten the connecting plate to the front and rear end portions of the side groove main body with bolts and bolts, it is necessary to secure a sufficient working space in the left and right side surfaces of the side groove main body.
Therefore, when the road width of the original prefectural road, city road, etc. is narrow, it is not possible to adopt the bolt fastening method using the eccentric seat plate when it is necessary to lay the gutter line at the border of the public and private sectors.

Japanese Patent Publication No.55-4164 Japanese Patent Publication No.57-1665

The object of the present invention is to provide a cross-section box-type side gutter that can be constructed quickly and accurately without entering private land, even at construction sites where the gutter line must be laid close to the public-private boundary, and has an excellent effect of suppressing subsidence and steps. It is to provide a joint structure.

In the cross-sectional box-type side groove joint structure according to the present invention, the length of the cover plate 2 is formed to be equal to the length of the side groove main body 1, and the lid hanging portion 4 formed on the inner side surface of the upper end portion of the left and right side wall plates 3 of the side groove main body 1. Nut-type inserts 5 are embedded in the front and rear end portions of the cover plate 3, and notches 6 having widths at which the front and rear end portions of the cover-hanging portion 4 appear are formed at the four front and rear and right and left corners of the cover plate 3. A male joint 8 and a female joint 9 are provided at the front and rear ends of the bottom wall plate 7 of the side groove body 1 to suppress relative displacement in the vertical and horizontal directions between the side groove bodies 1 and 1
The connecting member 10 is inserted into the notched portions 6 and 6 communicated with each other, and the bolt 12 is screwed into the nut-type insert 5 through the through-holes 11 at the front and rear end portions of the connecting member 10, so , 1 are connected to each other, and the cutout portions 6 and 6 are filled with cement mortar or concrete 13 to make up, and the cover plate 2 is joined to the side groove main body 1.

In the joint structure of the present invention, the notches 6 into which the connecting members 10 are fitted are formed at the four corners on the front, rear, left and right of the cover plate 2 in which the length and length of the side groove main body 1 are equal. Since it is embedded in the front and rear end portions of the lid hanging portion 4 that appears in the notch portion 6, the lid hanging portion 4 is formed on the inner side surface of the upper end portion of the left and right side wall plates 3 of the side groove main body 1. The space above the gutter body 1 is sufficient, and even in the construction site where the gutter line must be laid close to the public-private boundary, it is adjacent to the front and rear by the connecting member 10 and the bolt 12 without entering the delirium. The connecting operation of the side groove main bodies 1 and 1 and the filling operation of the mortar, the concrete 13 and the like into the notches 6 and 6 can be performed quickly and accurately.

Further, the front and rear end portions of the bottom wall plate 7 of the side groove main body 1 are male joints that suppress relative displacement in the vertical and horizontal directions between the side groove main bodies 1 and 1 adjacent to each other by engaging each other. 8 and the female joint 9 are provided, and in addition to the connecting effect of the connecting member 10 and the bolt 12 and the nut-type insert 5, according to the present invention, a side groove line having an excellent effect of suppressing settlement and step is provided. It can be laid reliably.

In the embodiment shown in FIGS. 1 to 9, the cutouts 6 at the four corners of the cover plate 2 have a rectangular shape in plan view, and are formed through the entire thickness of the cover plate 2. The width of the notch 6 is set to be the same as or slightly narrower than the width of the lid portion 4 of the gutter body 1, and the cement mortar and the concrete material 13 filled in the notches 6 and 6 leak to the water passage side. It is supposed not to.
The lid hanging portion 4 is formed in a stepped shape inside the side wall plate 3 leaving a raised portion on the outside. Anchor bars (not shown) are welded to the nut type inserts 5 embedded in the front and rear end portions of the lid hanging portion 4 respectively.

The connecting member 10 is formed of a thick metal plate, and round holes 11 and 11 are formed in front and rear ends. As shown in FIG. 8, the male joint portion 8 is formed of an angle metal plate, and an anchor bar 16 is welded to the back surface of the vertical piece of the angle metal plate. A parallel groove portion 19 is formed on the front end surface 7 a of the bottom wall plate 7, and a vertical piece portion of the male joint portion 8 is embedded and fixed in the parallel groove portion 19. The vertical piece portion of the male joint portion coincides with the front end surface 7a of the bottom wall plate 7 and the horizontal piece portion of the male joint portion 8 extends along the bottom surface 7c of the bottom wall plate 7 from the front end surface 7a. Projects at a right angle.

As shown in FIG. 8, the female joint portion 9 is formed of an angle metal plate, and an anchor bar 17 is welded to the intersection of the vertical piece and the horizontal piece of the angle metal plate. An L-shaped parallel groove portion 20 is formed on the bottom wall plate 7 from the rear end surface 7 b to the bottom surface 8, and the entire female joint 9 is embedded and fixed in the parallel groove portion 20. The vertical piece of the female joint 9 has the same position as the rear end face 7b, and the male joint is between the horizontal piece of the female joint 9 and the bottom 7c of the bottom wall plate 7. An interval equal to the thickness of 8 horizontal pieces is left.

The rear end surface 7b of the bottom wall plate 7 of the new side groove body 1 is brought into contact with the front end surface 7a of the bottom wall plate 7 of the existing side groove main body 1 laid along the planned laying line. When the side groove main body 1 is installed on the foundation ground, the male engagement portion 8 on the existing side groove main body 1 side and the female engagement portion 9 on the new side groove main body 1 side are engaged with each other. That is, as shown in FIG. 8, the vertical piece of the male engaging portion 8 and the vertical piece of the female engaging portion 9 are in contact with each other, and the female mold is placed on the horizontal piece of the male engaging portion 8. The horizontal piece of the engaging portion 9 is overlapped. As a result, the side groove bodies 1 and 1 adjacent to each other in the front-rear direction are closely joined so as to be displaced in the vertical direction and in the horizontal direction.

Thus, in the state in which the male engaging portion 8 and the female engaging portion 9 are engaged with each other, the cover portions 4 and 4 of the side groove bodies 1 and 1 adjacent to the front and rear are aligned in the length direction. When the cover plates 2 and 2 having the same length as that of the side groove main body 1 are fitted into the cover hanging portions 4 and 4, the notches 6 and 6 of the cover plates 2 and 2 adjacent to each other are in communication with each other, and the metal plate The connecting member 10 made of is fitted.
By tightening the bolts 12, 12 passed through the through holes 11, 11 of the connecting member 10 to the nut-type inserts 5, 5, the side groove bodies 1, 1 adjacent to each other are firmly connected so as not to be separated. Is done. After this connection operation is completed, the mortars 6 and 6 are filled with cement mortar and concrete material 13 so as to align with the upper surface of the cover plate 2.

Between the joint end faces of the side groove bodies 1 and 1 adjacent to the front and rear, a required joint treatment is performed using cement mortar or elastic fixed seal material according to the use of the cross-section box type side groove or the function expected of it. Or left without joint processing. Further, in the case of the gradient side groove, inverted concrete 14 for forming a running water gradient is placed on the upper surface side of the bottom wall plate 7.
Since the mutual engagement between the male engagement portion 8 and the female engagement portion 9 and the connection of the side groove bodies 1 and 1 by bolt joining via the connection member 10 are made strong, in this embodiment, the side groove body As shown in FIG. 7, No. 1 is placed on the foundation boring layer 28 and the spread sand layer 29, and the cast-in-place concrete is omitted.

In the present embodiment, a pair of positioning brackets 15 made of an angle metal plate are fixed to the bottom surface side of the cover plate 2 in a pair. The horizontal piece of the positioning fitting 15 to which the anchor bars 18 are welded is embedded and fixed to the cover plate 2 so that the bottom plate 2 and the surface position of the cover plate 2 coincide with each other. The vertical piece of the positioning fitting 15 is in contact with the upper part of the inner side surfaces of the left and right side wall plates 3 and 3 of the side groove main body 1 to prevent the cover plate 2 from rising and shifting, thereby preventing rattling noise.

The embodiment shown in FIGS. 10 to 13 is a partial modification of the embodiment shown in FIGS. That is, as a change point, a locking projection 26 is projected from the center of the horizontal piece of the male engagement portion 8, and a lock receiving hole 27 is formed at the center of the horizontal piece of the female engagement portion 9. Is formed. The locking projection 26 is formed of a metal round bar, and is fitted into the through hole of the horizontal piece of the male engagement portion 8 and welded.
In this embodiment, the locking protrusion 26 and the locking receiving hole 27 are engaged with each other, thereby increasing the effect of preventing the displacement in the vertical direction, the front-rear direction, and the left-right direction.

The embodiment shown in FIGS. 14 to 17 is a partial modification of the embodiment shown in FIGS. That is, as a change point, a locking projection 26 is projected from the center of the horizontal piece of the male engagement portion 8, and a lock receiving hole 27 is formed at the center of the horizontal piece of the female engagement portion 9. Is formed. The locking projection 26 is formed of a metal round bar, and is fitted into the through hole of the horizontal piece of the male engagement portion 8 and welded.
In this embodiment, the locking protrusion 26 and the locking receiving hole 27 are engaged with each other, thereby increasing the effect of preventing the displacement in the vertical direction, the front-rear direction, and the left-right direction.
As another change, the connecting member 10 is replaced with a metal square pipe from the metal plate. By configuring the connecting member 10 with a square pipe material, the shear strength of the connecting member 10 and the bending strength in the vertical and horizontal directions are increased. be able to.

14 to 17, the base plate 21 is welded to the upper surface of the connecting member 10 of the square pipe material, and the two stoppers 22 and 23 are welded to one side of the upper surface of the base plate 21. A long hole-like through hole 24 that is long in the length direction of the base plate 21 is provided between the stoppers 22, 23, and a round hole-like through hole 36 is provided at the other end of the base plate 21. The through hole 11 of the connecting member 10 facing the through hole 24 is formed in a long hole shape that is long in the length direction of the connecting member 10.
The bolt 12 passed through the through hole 25 of the eccentric seat plate 37 is screwed into the nut-type insert 5 through the long hole through hole 24 of the base plate 21 and the long hole through hole 11 of the connecting member 10. Are combined. The circumferential surface of the eccentric seat plate 37 is in contact with the two stoppers 22 and 23. Another bolt 12 is screwed into the nut type insert 5 through the round hole-like through hole 36 of the base plate 24 and the round hole-like through hole 11 of the connecting member 10. Since such a double stopper type eccentric seat plate joining method is employed, a joint structure that is resistant to lateral displacement in the left-right direction can be obtained.

In the embodiment shown in FIG. 18, a hard rubber plate 30 is attached to the outer surface of the vertical piece of the positioning fitting 15, and the hard rubber plate 30 is placed on the inner side upper portions of the left and right side wall plates 3, 3 of the side groove body 1. By abutting, the rising and shifting of the cover plate 2 are more firmly suppressed, and the generation of rattling noise is prevented.

The embodiment shown in FIG. 19 is a modification of the embodiment of FIG. 18, and a nut 32 is welded to the inner surface side of the vertical piece of the position fitting 15, and is screwed into the nut 32. The tip of the bolt 33 is abutted against the inner surface of the side wall plates 3 and 3. Therefore, the effect of restraining the floating and deviation of the cover plate 2 is enhanced. There is a level adjustment and adhesive layer 34 between the cover plate 2 and the cover hanging portion 4, and a grout material 35 is injected into the gap between the cover plate 2 and the raised portion of the side groove body 1, The joint integration with the cover plate 2 is promoted.
The lid 2 is not limited to a flat lid having a flat upper surface, and can be applied to an L-shaped lid having a raised one side. In addition, the connection method using the eccentric material plate is not limited to the double stopper method, and a single stopper method can also be used.
In the above embodiment, both the male engaging portion 8 and the female engaging portion 9 are formed of angle metal plates, and when the side groove bodies 1 and 1 adjacent to each other are joined, they are in contact with each other. Therefore, it is possible to perform the joining work safely without causing breakage or loss of the concrete part during joining.

It is a perspective view of the front end part side of a section box type side groove to which a joint structure concerning one example of the present invention is applied. It is a perspective view of the rear-end part side of the side groove | channel of FIG. 1, and is drawn in the state reversed 180 degree | times. FIG. 2 is a plan view of a side groove body used in the side groove of FIG. It is a top view of the cover plate used for the side groove of FIG. FIG. 5 is a right side view of the lid plate of FIG. 4. It is a top view of the connection state of the side groove of FIG. It is a right view of the connection state of the side groove of FIG. It is a vertical sectional view along the length direction of the joint part in the side groove of FIG. It is a vertical sectional view along the width direction of the joint part in the side groove of FIG. It is a perspective view of the front end part side of a cross-section box type side groove to which a joint structure according to another embodiment of the present invention is applied. It is a perspective view of the rear-end part side of the side groove | channel of FIG. 10, and is drawn in the state reversed 180 degree | times. It is a vertical sectional view along the length direction of the joint part in the side groove of FIG. It is a vertical sectional view along the width direction of the joint part in the side groove of FIG. It is a vertical sectional view along the length direction of the joint part in the section box type side groove to which the joint structure concerning another example of the present invention is applied. It is a vertical sectional view along the width direction of the joint part in the side groove of FIG. It is a top enlarged side view of the joint part in the side groove of FIG. It is a lower expanded sectional view of the joint part in the side groove of FIG. It is an upper section expanded sectional view in a section box type side slot concerning other examples of the present invention. It is a top expanded sectional view in a section box type side slot concerning other examples of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side groove body 2 Cover plate 3 Side wall plate 4 Cover part 5 Nut type insert 6 Notch part 7 Bottom wall plate 8 Male engagement part 9 Female engagement part 10 Connecting member 11 Through-hole 12 Bolt 13 Mortar

Claims (1)

The length of the cover plate 2 is formed to be equal to the length of the side groove body 1, and nut type inserts 5 are embedded in the front and rear end portions of the lid hanging portion 4 formed on the inner surface of the upper end portion of the left and right side wall plates 3 of the side groove body 1. A notch 6 having a width where front and rear end portions of the lid hanging portion 4 appear is formed at four front and rear, right and left corners of the cover plate 3, and is engaged with each other so that the vertical and horizontal directions between the side groove bodies 1 and 1 adjacent to each other A male joint 8 and a female joint 9 that suppress relative displacement to the bottom wall plate 7 of the side groove body 1 are provided at the front and rear ends of the side groove body 1,
The connecting member 10 is fitted into the notched portions 6 and 6 communicated with each other, and the bolt 12 is screwed into the nut-type insert 5 through the through-holes 11 at the front and rear end portions of the connecting member 10, so , 1 are connected to each other, cement mortar or concrete 13 is filled in the notches 6 and 6 to make up, and the lid 2 is joined to the side groove body 1 in a cross-section box-type side groove joint structure.

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