JP2020084515A - Ground cover widening structure and ground cover widening method - Google Patents

Abstract

To provide a ground cover widening structure capable of receiving a wide range of loads, reducing cracks in asphalt, and easily adjusting the height between adjacent units.SOLUTION: A ground cover widening structure is constituted by arranging, in the right-left direction, a plurality of ground cover widening units 1a including an inverted U-shaped face plate 2a whose bottom side is opened and a base plate 3a having a curb bottom surface portion 32 on an edge side, which is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion 10a extending in the right-left direction when viewed from a front side. A joint 4 of channel steel as a girder member having a length for connecting the two or more ground cover widening units is connected to a lower surface of the curb bottom surface portion 32, and the adjacent ground cover widening units are connected to each other by the joint 4.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground cover widening structure including a ground cover widening unit installed to expand a road width of a roadway or a sidewalk that is bridged over a bridge or the like, and a ground cover widening method using the same.

Conventionally, as a slab widening structure, a slab widening structure is known in which steel slab widening units are arranged side by side in the left-right direction to be continuous, and the slab widening unit is a means for expanding a road width consisting of concrete floor slabs. As a method of removing the ground cover at the end of the floor slab and connecting the ground cover made of concrete to the outer part of the floor slab, it is stretched to the ground cover removal part at the end of the floor slab. A steel ground cover widening unit for fixing is known (for example, refer to Patent Documents 1 to 6).

Japanese Patent No. 3377764. Japanese Patent No. 6153187 Japanese Patent No. 6166005 Japanese Patent No. 6268250 Japanese Patent No. 6375022 Japanese Patent No. 6393847

However, in the conventional ground cover widening structure, since the base plates were welded to each other in units, stress such as live load and impact load is applied to the floor slab in the unit width range, so the stressed range is narrow and local. There was a problem of being a target.

When a live load is applied to the ground widening structure due to running of a vehicle, the ground widening structure bends in units, and sinking or rising occurs in units like white keys on a piano keyboard. There is a problem that cracks occur in the asphalt at the boundary between the units that are lined up in.

In addition, since the units are installed in units at the time of construction, there is a problem that it is difficult to match the height with an adjacent unit.

Therefore, an object of the present invention is to provide a ground cover widening structure and a ground cover widening method capable of receiving a load in a wide range, reducing cracks in asphalt, and easily adjusting the height between adjacent units. It is in.

In order to achieve the first object, a first aspect of the present invention is an inverted U-shaped face plate whose bottom side is an opening,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A ground cover widening structure configured by arranging a plurality of ground cover widening units including
A girder material having a length for connecting two or more of the ground covering widening units is connected to the lower surface of the curb bottom surface portion,
There is provided a ground cover widening structure characterized in that adjacent ground cover widening units are connected to each other by the girder member.

According to the first aspect of the present invention, it is possible to receive a load in a wide range, reduce cracks in asphalt, and easily adjust the height between adjacent units. Since the load is transmitted to and distributed by the girders not only in the adjacent units but also in all the units connected by the girders, the entire floor slab can receive the load. Further, since the load is distributed to a large number of units, the deflection is reduced, and therefore, the cracks of the asphalt are reduced when the live load is loaded. Since it is possible to make the heights of not only the adjacent units but also all the units connected by the girders, it is easy to adjust the heights of the units during the construction.

Furthermore, the girder material is a channel steel arranged with the opening facing outward and bolt holes formed in the upper flange,
It is preferable that a bolt hole for connecting the girder member with a bolt is formed in the curb bottom surface portion so as to correspond to the bolt hole.
Since each unit is forcibly attached to the channel steel by bolts so that the heights of the adjacent units are aligned, it is easier to adjust the heights of the adjacent units during the construction. In addition, where rainwater is transmitted to the ground widening unit and causes corrosion of the structure, the channel steel exerts the function of draining rainwater that has adhered, so the rainwater draining effect is created and the durability of the structure is improved. To do. The U-shaped line runs straight, so the scenery looks powerful and modern.

In addition, the ground cover widening unit,
A base folding curved surface portion fixed to the back surface of the base plate,
A front bent surface that is projected downward and has a length in the vertical direction that is shorter than the length in the height direction of the girder member,
It is preferable to have an L-shaped belly plate having
The effect of draining rainwater is further enhanced, and the abdominal plate is hidden when the bridge is viewed from the side, so it has a beautiful appearance.

Further, in the case of a sidewalk, there is further provided on the upper surface side of the base plate, a bottom surface portion protruding forward from the inside of the curb portion and attached to the upper surface of the base plate, and a side surface portion continuously provided above both left and right ends of the bottom surface portion. However, it is preferable to have a U-shaped anchor bar that is open at the top. The overhang length can be increased, the deflection can be further reduced, the base plate can be thinned, and the safety factor does not become excessive. Moreover, since the connecting bolt is embedded in the asphalt, the appearance is further improved.

A second aspect of the present invention is an inverted U-shaped face plate whose bottom side is an opening,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A plurality of ground cover widening units equipped with
Attached to the floor slab in a row in series along the floor slab side end of the road bridge,
Next, there is provided a method of widening the ground cover, which comprises connecting a girder material having a length for connecting two or more of the ground widening units to the lower surface of the curb bottom portion.

According to the second aspect of the present invention, it is possible to receive a load in a wide range and reduce cracks in asphalt. Deflection can be prevented because the heights of adjacent units are the same.

According to the present invention, a load can be received in a wide range, cracks in asphalt can be reduced, and height adjustment between adjacent units can be easily performed.

It is a perspective view (1) of the ground cover widening structure of Example 1 of this invention. It is a perspective view (2) of the ground cover widening structure of Example 1 of this invention. It is an internal structure explanatory view of the ground covering widening unit in Example 1 of the present invention. It is a top view of the ground covering widening unit in Example 1 of this invention. It is a right side view of the ground covering widening unit in Example 1 of the present invention. It is a left side view of the ground covering widening unit in Example 1 of the present invention. It is a front view of the ground covering widening unit in Example 1 of the present invention. It is a rear view of the ground covering widening unit in Example 1 of the present invention. It is a bottom view of the ground covering widening unit in Example 1 of the present invention. It is the sectional view on the AA line of the ground covering widening unit in Example 1 of this invention. It is a BB line sectional view of the ground covering widening unit in Example 1 of the present invention. It is a perspective view (1) of the ground cover widening structure of Example 2 of this invention. It is a perspective view (2) of the ground cover widening structure of Example 2 of the present invention. It is an internal structure explanatory view of the ground covering widening unit in Example 2 of the present invention. It is a top view of the ground covering widening unit in Example 2 of the present invention. It is a right view of the ground covering widening unit in Example 2 of the present invention. It is a left side view of the ground covering widening unit in Example 2 of the present invention. It is a front view of the ground covering widening unit in Example 2 of the present invention. It is a rear view of the ground covering widening unit in Example 2 of the present invention. It is a bottom view of the ground covering widening unit in Example 2 of the present invention. It is the sectional view on the AA line of the ground covering widening unit in Example 2 of this invention. It is a BB line sectional view of the ground covering widening unit in Example 2 of the present invention.

Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

The ground cover widening structure of the first embodiment is a road cover widening unit for a roadway. The area covering widening units are connected to each other in the left-right direction to form a single ground covering widening structure.

{Constitution}

First Embodiment FIG. 1 is a perspective view (1) of a ground covering widening structure according to a first embodiment of the present invention. FIG. 1 is a diagram showing a plane (upper surface), a front surface, and a right side surface. FIG. 2 is a perspective view (2) of the ground covering widening structure according to the first embodiment of the present invention. FIG. 2 is a diagram showing a bottom surface (lower surface), a back surface, and a left side surface.

The ground cover widening structure according to the first embodiment of the present invention includes a plurality of ground cover widening units 1a arranged side by side. The ground covering widening unit 1a is an inverted U-shaped face plate 2a having an opening on the bottom side and a hollow curb which is arranged on the bottom side of the face plate 2a and combined with the face plate 2a and extends in the left-right direction when viewed from the front side. The base plate 3a has a curb bottom surface portion 32 forming the portion 10a on the edge side. In the ground cover widening structure of the present embodiment, a channel steel joint 4 as a girder material having a length for connecting two or more ground cover widening units 1a is connected to the lower surface of the curb bottom portion 32, and the joint 4 The adjacent land widening units are connected to each other by.

The material of the ground cover widening structure of this embodiment is made of steel. The face plate 2a, the guard plate 7, the lock plate 8 and the joint 4 may be made of resin such as polycarbonate.

The floor covering widening units 1a are arranged continuously so that the longitudinal sides of the curb portions 10a are orthogonal to the width direction of the road, with the back side being both ends of the bridge, that is, the outside, and the front side being the road side. The base plate 3a is placed on the end of the plate and fixed by the anchor bolt for fixing.

The floor slab to which the ground covering widening unit 1a is attached in the present embodiment is a precast (PC) floor slab, but may be a normal concrete floor slab such as an RC floor slab or a thick concrete floor slab, or a steel floor slab. But it's okay.

Both the road widening unit 1a for roadway according to the present embodiment and the ground widening unit for sidewalk 1b according to Example 2 to be described later have a hollow portion serving as a curb at the back side end, that is, the edge side. , Especially suitable for installation on bridges. The curb is also called the ground cover, and is one step higher than the roadway or sidewalk adjacent to the front side so that the wheels of automobiles and bicycles do not jump outside.

The face plate 2a has an inverted U-shape, and is connected to the upper surface portion 24, the front surface portion 23a continuously provided on one end lower side of the upper surface portion 24, and the other end lower surface of the upper surface portion 24 facing the front surface portion 23a. The rear side 22 is provided, and the bottom side and the left and right side end sides are openings. In the present application, the left-right direction is specified with the front surface side as the front surface and the back surface side (edge side) as the back surface. The front surface portion 23a has a rectangular shape in front view, the upper surface portion 24 has a rectangular shape in top view, and the rear surface portion 22 has a rectangular shape in rear view.

The face plate 2a is made of steel, and is formed by bending into a right angled U-shape having an opening at the bottom (bottom side), that is, an inverted U-shape. That is, the face plate 2 a includes an upper surface portion 24, a front surface portion 23 a whose upper end is continuous with one end of the upper surface portion 24 and is a surface perpendicular to the upper surface portion 24, and the upper end is at the other end of the upper surface portion 24. It has a back surface portion 22 which is continuous and faces the front surface portion 23a and which is a parallel surface.

In this embodiment, the face plate 2a is provided with a face plate reinforcing rib 21 vertically provided on the back surface side of the face plate, that is, the surface on the inner side of the curb.

The upper surface 24 of the face plate 2a is provided with a pillar mounting hole 243 for mounting a pillar such as a balustrade or a protective fence. At the center of the back surface of the upper surface portion 24, there is a reinforcing plate having a column mounting hole 243 formed therein.

The front surface portion 23a of the face plate 2a has a cutout portion 25 in the lower portion. In the present embodiment, the cutout portion 25a is opened from the right side of the anchor bar 35a at the right end so that all the plurality of anchor bars 35a (five in this embodiment) are included in the cutout, and the anchor at the left end is formed. It opens to the left of the bar 35a. The bolt 9 that connects the front surface portion 23a and the front side plate 36a is provided above the cutout portion 25a and below the guard plate 7.

On the front face portion 23a, one guard plate 7 is provided above the bolt 9 from the right end to the left end.

FIG. 3 is an explanatory diagram of an internal structure of the ground covering widening unit according to the first embodiment of the present invention.

The base plate 3a is a steel flat plate disposed on the bottom side of the face plate 2a, and is a plate extending from the back surface portion 22 of the face plate 2a to the front side from the front surface portion 23a.

The base plate 3a is combined with the face plate 2a to close an opening on the bottom side of the face plate 2a and form a curb portion 10a which is a rectangular parallelepiped hollow cylindrical box extending in the left-right direction when viewed from the front side. The curb bottom surface portion 32, which is a portion forming the curb portion 10a, extends to the front surface portion 23a. The base plate 3a has an extending portion 33 that extends forward of the front face portion 23a of the curb portion 10a. The curb bottom surface portion 32 and the extension portion 33 are one continuous plate.

The base plates 3a of each unit are arranged in succession on the left and right, and the face plate 2a of each unit is placed on and fixed to the base plate 3a.

In this embodiment, three bolt holes 38 for attaching the base plate 3a to the floor slab are provided. A fixing anchor bolt, which is a metal-based anchor, can be attached to the bolt hole 38.

On the upper surface side of the base plate 3a, a plurality of anchor bars 35a, which are solid steel square bars, are attached at a right angle to the front surface portion 23a. A belly plate 6 is attached to the lower portion of the base plate 3a.

The base plate 3a has a back side plate 37a, a front side plate 36a, and a base plate reinforcing rib 31a.

The rear side plate 37a is erected on the upper surface of the rear side end of the base plate 3a, and is connected to the inner side surface of the rear surface 22 of the face plate 2a with bolts 9.

The front side plate 36a is erected on the upper surface of the base plate 3a in parallel with the back side plate 37a, and is connected to the back side (inner side surface) of the front surface portion 23a of the face plate 2a with a bolt 9.

The lower portion of the front side plate 36a has a plurality of notches, and the anchor bars 35a are respectively inserted and fixed at right angles. In this embodiment, the anchor bar 35a has a thickness of about 20 mm, but the thickness is not limited to this. The lower notches of the front side plate 36a are notches into which the anchor bars 35a are inserted one by one, and are provided at five locations on the front side plate 36a.

The base plate reinforcing rib 31a is erected on the upper surface of the base plate 3a and connects the front side plate 36a and the back side plate 37a. The base plate reinforcing rib 31a has a height such that the upper end reaches the vicinity of the inner side surface of the upper surface portion 24. A plurality of base plate reinforcing ribs 31a are provided in parallel. The base plate reinforcing rib 31a connects the front side plate 36a and the rear side plate 37 at a right angle. The base plate reinforcing rib 31a plays a role of reinforcing the impact from the front surface side or the upper surface side of the curb portion 10a.

In this embodiment, the base plate reinforcing rib 31a is a rectangle with four corners cut off. The base plate reinforcing rib may have a rectangular shape or a trapezoidal shape in which the upper side is smaller than the lower side. The trapezoidal shape can reduce the weight.

The back side plate 37a, the front side plate 36a, and the base plate reinforcing rib 31a are attached to the upper surface side of the base plate 3a by welding and form a part of the base plate 3a.

The joint 4 is a girder material having a length for connecting two or more ground covering widening units 1a, and is channel steel in this embodiment. Specifically, the joint 4 which is a girder material is a channel steel in which the opening is arranged with the edge facing toward the edge side, that is, outward, and the upper flange is provided with a bolt hole. Bolt holes are formed to connect the joints 4 with bolts corresponding to the bolt holes.

All units to which the joint 4 is connected by connecting the joint 4 which is a U-shaped channel steel at the end of the overhanging portion on the edge side and when a load is applied to the widened part, from one unit to the joint 4 Since the load is distributed and transmitted to, the load will be taken over by the entire floor slab, and the load will be distributed.

When a live load is loaded by a truck passing over a bridge, a large number of units likewise receive it, resulting in less deflection and less cracking in asphalt.

At the time of construction, the units are attached and installed in units, and the joint 4 which is a U-shaped steel material is attached to the ground covering widening unit 1a with bolts, so that the height and the like can be forcibly matched with the adjacent units. In the conventional ground cover widening structure, the ground cover widening unit is attached and installed on a unit-by-unit basis, and adjustment with an adjacent unit is complicated, but in this embodiment, the height and the like are forcibly adjusted, Is easy.

During rain, rainwater adheres to the widening structure of the ground cover, but since the shaped steel joint 4 is provided, the shaped steel is drained and durability is improved.

Since the joint 4 is located on the lower side of the base plate, there is no problem that the asphalt to be paved has a thin fogging and is easily peeled off.

In the present embodiment, the joint 4 has a length of 3200 mm in the longitudinal direction, a web height of 150 mm, and upper flanges and lower flanges of 75 mm in length, but the present invention is not limited to this. The length in the longitudinal direction may be longer. The joining method is preferably bolt joining.

In the present embodiment, the joint 4 is a U-shaped channel steel, but the joint 4 is not limited to the U-shaped, but the equilateral angle steel, the unequal side angle steel, the unequal side unequal thick angle steel, the groove, depending on strength and weight. Shaped steel, I-shaped steel, CT-shaped steel and H-shaped steel may be used. Alternatively, it may be made of resin.

When the existing bridge is old and has weight restrictions, it is preferable to add a reinforcing rib or the like to the shaped steel joint 4 to prevent an increase in weight by increasing the size.

FIG. 4 is a plan view of the ground covering widening unit according to the first embodiment of the present invention. In this embodiment, the length (width) of the face plate 2a in the left-right direction is 1190 mm, the length (depth) from the guard plate to the back surface is 400 mm, and the height of the curb 10a is from the bottom surface of the base plate 3a. The height is 350 mm, the length (depth) of the base plate 3a is 1540 mm, and the length (depth) of the extending portion 33a is 1140 mm. Each size is not limited to this. In this embodiment, the joint 4 is twice or more the length (width) of the face plate 2a in the left-right direction, and the joint 4 connects a maximum of four ground cover widening units. For example, the right end of one joint 4 is located in the middle of one ground cover widening unit, the two ground cover widening units are supported by the same joint 4 over the entire length, and the same joint 4 is installed in the middle of the left ground cover widening unit. It is possible that there is a left edge.

FIG. 5 is a right side view of the ground covering widening unit according to the first embodiment of the present invention. FIG. 6 is a left side view of the ground covering widening unit according to the first embodiment of the present invention. FIG. 7 is a front view of the ground covering widening unit according to the first embodiment of the present invention. FIG. 8 is a rear view of the ground covering widening unit according to the first embodiment of the present invention.

At right and left ends of the face plate 2a, right-angled U-shaped, that is, a rectangular inverted U-shaped lock plate 8 is fitted along the inner surface of the face plate 2a. It projects outside the inner wall of the left and right ends of 2a. The lock plate 8 is shared with the face plates of the adjacent ground covering widening units, and one lock plate 8 is fitted along the inner surface of each of the face plates of the two ground covering widening units connected to each other. That is, each area covering widening unit excluding the ground covering widening units at both ends has one lock plate per unit, and is inserted into the right or left side end portion of the face plate so as to be connected to the adjacent ground covering widening unit. Used for connection. The lock plate 8 maintains the height between the upper surface portion 24 of the face plate 2a and the base plate 3a to prevent rattling.

The anchor bar 35a is a rod-shaped rib provided in the direction from the extending portion 33 of the base plate 3a to the curb bottom surface portion 32 and reaches the inside of the curb portion 10a. In this embodiment, five anchor bars 35a are provided, but the number is not limited to this.

Each of the anchor bars 35a is a solid steel rectangular parallelepiped bar having the same length, and is welded to the base plate 3a.

In this embodiment, the height of the anchor bar 35a is 55 mm, and the height of the front side plate 36a, the back side plate 37a, and the base plate reinforcing rib 31a is 204 mm. The length (width) of the anchor bar 35a in the left-right direction is 55 mm. The length (depth) in the longitudinal direction of the anchor bar 35a is 1180 mm.

FIG. 9 is a bottom view of the ground covering widening unit according to the first embodiment of the present invention.

In this embodiment, the abdominal plate 6 is provided on the back surface side of the base plate 3a.

The abdominal plate 6 is an L-shape having a base folding curved surface portion 66 and a front folding curved surface portion 67. The base folding curved surface portion 66 is fixed to the back surface of the base plate 3a and the front folding curved surface portion 67 projects downward. I am allowed to do it. The abdominal plate 6 is fixed to the back side of the base plate 3a with bolts 9. The abdominal plate 6 has the abdominal plate reinforcing ribs 61 which are fixed by abutting on the inner side surfaces of the base bent surface 66 and the front bent surface 67. The abdominal plate reinforcing rib 61 is welded and fixed to the base bent surface 66 and the front bent surface 67. The abdominal plate reinforcing rib 61 is provided perpendicularly to the base bent surface 66 and the front bent surface 67. In this embodiment, the bent front curved surface portion 67 is located below the extending portion 33.

In the present embodiment, the number of the abdominal plate reinforcing ribs 61 is three, but the number is not limited to this. Both the base plate reinforcing rib 31 and the abdominal plate reinforcing rib 61 play a role of maintaining strength.

The abdominal plate 6 is fixed to the back surface of the base plate 3a, and the front bent surface 67 is attached in contact with the side surface of the floor slab. A bolt can be attached to the bolt hole 68 of the abdominal plate 6 to fix the abdominal plate 6 to the side surface of the floor slab. According to the present embodiment, the road width is widened by the distance from the portion of the base plate 3a where the front bent curved surface portion 67 is provided to the outer end portion of the base plate 3a.

In the present embodiment, in the abdominal plate 6, the height of the front bent curved surface portion 67 is 275 mm, but the height is not limited to this.

10 is a cross-sectional view taken along the line AA of the ground covering widening unit according to the first embodiment of the present invention. Further, FIG. 11 is a cross-sectional view taken along line BB of the ground covering widening unit according to the first embodiment of the present invention.

The ground cover widening unit 1a has the back side on the outside and the front side on the concrete slab side so that the front bent curved surface portion 67 of the slab 6 contacts the end of the concrete slab. The abdominal plate reinforcing ribs 61 are made parallel to the width direction of the road, and the ground covering widening units 1a are attached to the floor slab in a row in series along the floor slab side end of the road bridge. The girder material having the length for connecting the above ground covering widening unit 1a is connected to the lower surface of the curb bottom surface portion 32 to continuously install it.

In this embodiment, asphalt or the like is poured on the extending portion 33 to expand the width of the roadway or the like. A balustrade, a protective fence, or the like may be provided on the ground covering widening unit 1a.

In the ground cover widening unit 1a, after mounting the base plate 3a on the floor slab, the base plate 3a is mounted and fixed on the floor slab.

{effect}
According to this embodiment, a load can be received in a wide range, cracks in asphalt can be reduced, and height adjustment between adjacent units can be easily performed.

Since the shaped steel girders are provided over the entire length of a plurality of the ground covering widening units arranged side by side, it is easy to make them continuous.

According to the present embodiment, since the load is transmitted to the adjacent units by the girder material formed of the shaped steel material, the load can be received by the entire floor slab. Further, since the load is distributed to a large number of units, the deflection is reduced, and therefore, the cracks of the asphalt are reduced when the live load is loaded. Moreover, since each unit is forcibly attached to the shaped steel material by bolts so that the heights of the adjacent units are aligned, it is easy to adjust the heights of the adjacent units when performing construction. Further, when the rainwater is transmitted and causes corrosion of the structure, the shaped steel exerts a drainage function of the attached rainwater, so that the rainwater draining effect is produced and the durability of the structure is improved.

In this embodiment, since it is a channel steel girder material, the U-shaped line runs straight, so that it looks powerful and modern in the landscape.

In the case of a life road bridge of about 5 m, by extending the shaped steel material to the abutment and using it as a bridge girder, it becomes a two-point support structure from a cantilever structure, so the extension length can be extended. ..

The ground cover widening structure of the second embodiment is a ground cover widening unit for sidewalks. The differences from the first embodiment will be mainly described.

{Constitution}
FIG. 12 is a perspective view (1) of the ground cover widening structure according to the second embodiment of the present invention. FIG. 12 is a diagram showing a plane (upper surface), a front surface, and a right side surface. Moreover, FIG. 13 is a perspective view (2) of the ground cover widening structure according to the second embodiment of the present invention. FIG. 13 is a diagram showing a bottom surface (lower surface), a back surface, and a left side surface.

The ground cover widening structure according to the first embodiment of the present invention includes a plurality of ground cover widening units 1b arranged side by side. The ground covering widening unit 1b is an inverted U-shaped face plate 2b having an opening on the bottom side and a hollow curb which is arranged on the bottom side of the face plate 2b and combined with the face plate 2b and extends in the left-right direction when viewed from the front side. The base plate 3b has a curb bottom surface portion 32 forming the portion 10b on the edge side. In the ground cover widening structure of the present embodiment, a joint 4 which is a channel steel as a girder material having a length for connecting two or more ground cover widening units 1b is connected to the lower surface of the curb bottom surface portion 32. Adjacent ground covering widening units 4 are connected to each other by 4.

The material of the ground cover widening structure of this embodiment is made of steel. The face plate 2a and the lock plate 8 may be made of polycarbonate. In the present embodiment, the ground cover widening unit 1b is not provided with the guard plate 7.

The floor covering widening units 1b are arranged on a concrete floor by arranging the back side on both sides of the bridge, that is, on the outside, and setting the front side on the sidewalk so that the longitudinal direction of the curb portion 10b is orthogonal to the width direction of the sidewalk. The base plate 3b is placed on the end of the plate and fixed by the anchor bolts for fixing.

The ground covering widening unit 1b of this embodiment is attached to a floor slab, and the floor slab may be a precast (PC) floor slab, a normal concrete floor slab such as an RC floor slab, or a thick concrete floor slab. The ground widening unit may be attached to the steel deck.

The front face portion 23b of the face plate 2b has a plurality of cutout portions 25 in its lower portion. In the present embodiment, in the cutout portion, a cutout portion 25b that is cut out for one whole anchor bar 35b, a cutout portion 25c into which the side surface portion 352 of the anchor bar 35b is inserted, and a side surface portion of one anchor bar 35b. 352 to the side surface portion 352 of the adjacent anchor bar 35b and the cutout portion 25d. In the present embodiment, the cutout portion 25 is a combination of one or more of the cutout portions 25b, c, d, but the combination is not limited. A bolt 9 that connects the front face portion 23b and the front side plate 36b is provided between the cutout portions.

The front surface portion 23b of the face plate 2b is the same as the front surface portion 23a of the ground covering widening unit 1a of the first embodiment except that the notch portion 25 does not include a part of the front surface portion.

In other respects, the face plate 2b has the same configuration and material as the face plate 2a of the ground covering widening unit 1a in the first embodiment described above.

FIG. 14 is an explanatory diagram of the internal structure of the ground covering widening unit according to the second embodiment of the present invention.

On the upper surface side of the base plate 3b, there is a bottom surface portion 351 protruding forward from the inside of the curb portion 10b and attached to the upper surface of the base plate 3b, and side surface portions 352 that are continuously provided above the left and right ends of the bottom surface portion 351. An anchor bar 35b made of steel and having a U-shape (the opening has an upper side U-shape) is provided. Since the anchor bar 35b is U-shaped, it is lighter than a solid timber.

The front side plate 36b of the base plate 3b is provided with slits to be fitted through the side surface portions 352a, 352b of the anchor bar 35b. Of the lower end of the front side plate 36b, the portion where the anchor bar 35b is attached to the upper surface of the base plate 3b is the anchor bar. A portion up to the upper surface of the bottom surface portion 351 of the base plate 35b where the anchor bar 35b is not attached to the upper surface of the base plate 3b extends to the upper surface of the base plate 3b and is welded to the base plate 3b.

The front side plate 36b of the base plate 3b is a rectangle with both lower corners cut off.

In this embodiment, the height of the anchor bar 35b is 75 mm, and the height of the front plate side plate 36b, the back side plate 37b, and the base plate reinforcing rib 31b is 80 mm. The length (width) of the anchor bar 35b in the left-right direction is 125 mm. Each size is not limited to this.

In other respects, the base plate 3b has the same configuration and material as the base plate 3a of the ground covering widening unit 1a in the first embodiment described above.

In the present embodiment, the joint 4 has a length of 3200 mm in the longitudinal direction, a web height of 150 mm, and upper flanges and lower flanges of 75 mm in length, but the present invention is not limited to this. The length in the longitudinal direction may be longer.

FIG. 15 is a plan view of the ground covering widening unit according to the second embodiment of the present invention. In this embodiment, the length (width) of the face plate 2b in the left-right direction is 1194 mm, the length from the front surface portion to the back surface (curb portion depth) is 400 mm, and the extension portion of the base plate 3b from the center of the curb portion 10b. The length (depth) of the anchor bar 35b extending to 33 in the longitudinal direction is 1563 mm, the length (depth) of the base plate 3b is 1913 mm, and the length (depth) of the extending portion 33 is 1513 mm. Each size is not limited to this.

FIG. 16 is a right side view of the ground covering widening unit according to the second embodiment of the present invention. FIG. 17 is a left side view of the ground covering widening unit according to the second embodiment of the present invention. 18 is a front view of the ground covering widening unit according to the second embodiment of the present invention. FIG. 19 is a rear view of the ground covering widening unit according to the second embodiment of the present invention.

In this embodiment, the lock plate 8 has the same structure and material as the lock plate 8 of the ground covering widening unit 1a in the above-described first embodiment.

FIG. 20 is a bottom view of the ground covering widening unit according to the second embodiment of the present invention. In addition, FIG. 21 is a cross-sectional view taken along the line AA of the ground covering widening unit according to the second embodiment of the present invention. FIG. 22 is a cross-sectional view taken along line BB of the ground covering widening unit according to the second embodiment of the present invention.

In this embodiment, the abdominal plate 6 is provided on the back surface side of the base plate 3b. In the present embodiment, the number of the abdominal plate reinforcing ribs 61 is three, but the number is not limited to this.

In the present embodiment, the width of the sidewalk is widened by the same method as in the first embodiment, and asphalt or the like is poured onto the extending portion 33 to expand the width of the sidewalk. A balustrade, a protective fence, or the like may be provided on the ground covering widening unit 1.

The abdominal plate 6 is an L-shape having a base bent curved surface portion 66 fixed to the back surface of the base plate 3b and a front bent curved surface portion 67 protruding downward, and is reinforced by a belly plate reinforcing rib 61. In this embodiment, the front bent curved surface portion 67 is projected downward and has a height shorter than the height of the joint 4 which is a girder material.

In the present embodiment, in the abdominal plate 6, the height of the bent front curved surface portion 67 is 140 mm, but the height is not limited to this. According to this embodiment, when viewed from the side of the bridge, the front bent curved surface portion 67 is hidden by the joint 4, which is excellent in appearance.

In the ground covering widening unit 1b, after mounting the base plate 3b on the floor slab, the base plate 3b is mounted on the floor slab to fix the anchor bolts through the bolt holes 38 and the hole-in anchors through the bolt holes 68. It is fixed to the side.

The other configurations are common to those of the above-described ground cover widening unit 1a of the first embodiment.

According to this embodiment, a load can be received in a wide range, cracks in asphalt can be reduced, and height adjustment between adjacent units can be easily performed.

According to this embodiment, since the load is transmitted to the adjacent units by the shaped steel material, the load can be received by the entire floor slab. Further, since the load is distributed to a large number of units, the deflection is reduced, and therefore, the cracks of the asphalt are reduced when the live load is loaded. Moreover, since each unit is forcibly attached to the shaped steel material by bolts so that the heights of the adjacent units are aligned, it is easy to adjust the heights of the adjacent units when performing construction. Further, when the rainwater is transmitted and causes corrosion of the structure, the shaped steel exerts a drainage function of the attached rainwater, so that the rainwater draining effect is produced and the durability of the structure is improved. In the case of a community road bridge of about 5 mm, it is possible to change from a cantilever structure to a two-point support structure by extending the shaped steel material to the abutment and using it as a bridge girder, and the extension length can be extended. It may be possible.

Further, according to the present embodiment, since the weight per length is lighter than that of the ground covering widening unit having the solid anchor bar of square timber, it is suitable for the widening work in which the overhanging length is 1000 mm or more for the sidewalk. Can be applied, and an effective width of 1500 mm can be secured as a bicycle pedestrian path. According to this embodiment, since the weight of the anchor bar is light, the total length of the anchor bar can be increased and the deflection thereof can be further reduced.

According to this embodiment, since the welding line of the anchor bar is small and the influence of welding heat is small, the base plate can be thinned. According to this embodiment, the welded portion becomes flare welded, and the weldability is good. According to this embodiment, since the welding is performed in the R shape, the effect of the pseudo groove is produced. According to the present embodiment, since the connecting bolt is installed inside (lower side) of the U-shaped anchor bar, the connecting bolt is embedded in the asphalt and the appearance is further improved.

Further, according to this embodiment, since the anchor bar is U-shaped, the section modulus is small and the safety factor does not become excessive. According to the present embodiment, since the welding line of the anchor bar is small, the welding strain due to the influence of welding heat is small.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. Further, the constituent elements of each of the above embodiments can be arbitrarily combined without departing from the spirit of the invention.

1a, b Ground cover widening unit 2a, b Face plate 21 Face plate reinforcing rib 22 Back part 23a, b Front part 24 Top part 243 Strut mounting hole 25a, b, c, d Notch part 3a, b Base plate 31a, b Base plate Reinforcement rib 32 Curb bottom 33 33 Extension part 35a, b Anchor bar 351 Bottom part 352a, b Side 36a, b Front side plate 37a, b Back side plate 38 Bolt hole 4 Joint 6 Belly plate 61 Belly plate reinforcing rib 66 Base folding curved surface portion 67 Tip folding curved surface portion 68 Bolt hole 7 Guard plate 8 Lock plate 9 Bolt 10a, b Curb portion

The first aspect of the present invention is to achieve the above first object.
The bridge axis direction is the left-right direction, and the roadway or sidewalk side is the front in a plane parallel to the bridge axis direction.
An inverted U-shaped face plate with an opening on the bottom side,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A ground cover widening structure configured by arranging a plurality of ground cover widening units including
A girder material having a length for connecting two or more of the ground covering widening units is connected to the lower surface of the curb bottom surface portion,
There is provided a ground cover widening structure characterized in that adjacent ground cover widening units are connected to each other by the girder member.

The second aspect of the present invention is
The bridge axis direction is the left-right direction, and the roadway or sidewalk side is the front in a plane parallel to the bridge axis direction.
An inverted U-shaped face plate with an opening on the bottom side,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A plurality of ground cover widening units equipped with
Attached to the floor slab in a row in series along the floor slab side end of the road bridge,
Next, there is provided a method of widening the ground cover, which comprises connecting a girder material having a length for connecting two or more of the ground widening units to the lower surface of the curb bottom portion.

Claims (4)

An inverted U-shaped face plate with an opening on the bottom side,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A ground cover widening structure configured by arranging a plurality of ground cover widening units including
A girder material having a length for connecting two or more of the ground covering widening units is connected to the lower surface of the curb bottom surface portion,
A ground cover widening structure in which adjacent ground cover widening units are connected to each other by the girder member. The girder material is a channel steel arranged with an opening facing outward and bolt holes formed in the upper flange.
2. The ground covering widening structure according to claim 1, wherein a bolt hole for connecting the girder member with a bolt is bored in the curb bottom surface portion so as to correspond to the bolt hole. The cloth widening unit,
A base folding curved surface portion fixed to the back surface of the base plate,
A front bent surface that is projected downward and has a length in the vertical direction that is shorter than the length in the height direction of the girder member,
The ground cover widening structure according to claim 1 or 2, further comprising an L-shaped abdominal plate. An inverted U-shaped face plate with an opening on the bottom side,
A base plate having a curb bottom surface portion on the edge side that is arranged on the bottom side of the face plate and is combined with the face plate to form a hollow curb portion that extends in the left-right direction when viewed from the front side.
A plurality of ground cover widening units equipped with
Attached to the floor slab in a row in series along the floor slab side end of the road bridge,
Next, the girder widening method characterized in that a girder material having a length for connecting two or more of the above-mentioned ground widening units is connected to the lower surface of the curb bottom surface portion.

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