JP2022105912A - Lid device for underground structure and road structure using lid device for underground structure - Google Patents

Abstract

To provide a lid device for an underground structure and a road structure using the lid device for the underground structure allowing a common conduit for power cables to be buried without removing an existing underground installation even when a width of a pedestrian area is narrow.SOLUTION: Provided is a lid device 1 for an underground structure attached on an upper side of an upper opening 15 of a lower catch-basin of a common conduit for power cables buried in a pedestrian area 5 of a road 2 having a drive way 4 and the pedestrian area 5 as well as a street gutter 6 in an end part in a width direction of the pedestrian area 5 of the drive way 4, and having a bottom wall 11, side walls 12, 13 standing from end parts in a width direction of the bottom wall 11, and the upper opening 15. The lid device comprises a receiving frame in a frame shape and a lid body 17 installed in the receiving frame, and further comprises a base part 18 placed on upper ends of the side walls 12, 13 of the lower catch-basin of the common conduit and a vertical wall 19 standing from a direction of an inner side of a frame of the base part 18, wherein a specific area where an upper area above the base part 18 and an area of a frame outer side extending from the vertical wall 19 overlap to each other is configured to allow at least a part of an area 46 of one end side part of the pedestrian area 5 side of the street gutter 6 to be received.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lid device for an underground structure used in a utility tunnel for electric wires, and a road structure using a lid device for an underground structure.

The electric wire utility tunnel device of Patent Document 1 includes an electric wire utility tunnel main body embedded in a sidewalk area and a lid body arranged above the electric wire utility tunnel main body and supporting ground equipment. The ground equipment has a transformer, a switch, and the like inside thereof, and these are connected to various cables inserted into the electric wire utility tunnel main body. Further, in the electric wire utility tunnel device, the electric wire utility tunnel main body is buried in the sidewalk area so that the ground equipment is as close as possible to the curb on the road side.

The main body of the electric wire utility tunnel is formed with a cable insertion portion on the side wall through which various cables are inserted. For the cable insertion part, either form the side wall thinly, or gradually thin the side wall to make it an inclined surface as it reaches the opening, or cut off a part of the side wall and make a wife wall material on the outside of the wire utility tunnel body. It consists of arranging or connecting extension boxes. (See FIGS. 1 (a), (b), (c) of Patent Document 1).

The lid includes a positioning adjustment portion that closes the upper opening of the electric wire utility tunnel main body, and an equipment support edge that supports ground equipment, and the equipment support lid is fixed to the positioning adjustment portion so that the positioning can be adjusted. In short, as a lid, the device support lid is arranged close to the curb, and the positioning adjustment portion is positioned in the width direction of the sidewalk area due to the difference in the width of the sidewalk area.

Japanese Unexamined Patent Publication No. 2010-200559

By the way, when constructing the electric wire utility tunnel device of Patent Document 1, an underground buried object (existing pipe) may exist in the sidewalk area. The cable insertion portion of the electric wire utility tunnel body has a side wall processed as described above.

As shown in FIG. 1 (c), when a part of the side wall of the electric wire utility tunnel body is removed and an extension box is attached, the road becomes larger in the width direction as a whole, so excavation of the road from the street culvert to the sidewalk side. The width will widen. If there are underground buried objects such as pipes in such a wide excavation area, it is necessary to remove the underground buried objects and bury them in a new place.
Further, not only when the extension box is attached as shown in FIG. 1 (c), if the width of the sidewalk area is narrow and there is a building along the sidewalk area, the width dimension cannot be sufficiently taken and the electric wire utility tunnel main body cannot be buried.

Therefore, the present invention is for an underground structure lid device and an underground structure capable of burying a utility tunnel for electric wires without relocating or removing the underground buried object or even in a narrow sidewalk area. The purpose is to provide a road structure using a lid device.

The present invention has a roadway area and a sidewalk area, and is buried in the sidewalk area of a road having a utility tunnel at the widthwise end of the roadway area on the sidewalk area side, and has a bottom wall and the width direction of the bottom wall. It is a lid device for an underground structure attached to the upper side of the upper opening of the electric wire utility tunnel lower basin having a sidewalk and an upper opening erected from the end, and is a frame-shaped receiving frame and the receiving frame. A base portion mounted on the upper end of the sidewalk of the electric wire utility tunnel lower basin, and a vertical wall rising from the inside of the frame of the base portion, and above the base portion. The specific area where the area of No. 1 overlaps with the area outside the frame from the vertical wall is configured to accommodate at least a part of the one end side area of the street culvert on the sidewalk area side.

In the above configuration, at least a part of the side wall of the fixedly positioned utility tunnel is housed in a specific area where the area above the base of the underground structure lid device and the area outside the frame of the vertical wall overlap. Since the side wall on one side of the utility tunnel for electric wires goes under the street culvert where there is usually no underground buried object under it, the width of the utility tunnel for electric wires in the pedestrian area is substantially reduced. Therefore, there is no need to relocate or remove underground buried objects located next to the electric wire utility tunnel in the pedestrian area, or even in a narrow pedestrian area, the electric wire utility tunnel (electrical utility tunnel). Can be buried.

In the present invention, the rising height of the vertical wall is set to be equal to or higher than the height of the one end side area of the street, and the specific area is the upper end of the one end side area of the street. The street culvert can be stored in a state where the upper end portion of the vertical wall is at the same height and the sidewalk area of the one end side area is in contact with the outer surface which is the outside of the frame of the vertical wall. It is possible to adopt the configuration configured in.

In the above configuration, in the specific area, since the upper end of the one end side area of the street and the upper end of the vertical wall are at the same height, these can be installed without a step, and the sidewalk area of the one end side area can be installed. Since the sidewalk is configured to be able to store the street culvert in a state where the side surface is in contact with the outer surface which is the outside of the frame of the vertical wall, the width of the lid device for the underground structure with respect to the street culvert is substantially reduced.

In the present invention, the receiving frame includes a rib connected to an outer surface of the vertical wall outside the frame and an upper surface of the base portion, and the specific region is formed above the rib. can.

According to the above configuration, the street canal can be accommodated on it while being reinforced with ribs.

In the present invention, the upper end portion of the rib can be formed in a flat shape on which the bottom surface of the street can be placed.

In the above configuration, since the upper end of the rib is formed in a flat shape on which the bottom surface of the street can be placed, it becomes easy to align the bottom of the street with respect to the receiving frame in the vertical direction.

The road structure of the present invention is characterized in that the one end side region of the street culvert is accommodated in the specific region of the lid device for an underground structure according to any one of the above.

According to the above configuration, there is no need to relocate or remove underground buried objects placed next to the electric wire utility tunnel in the sidewalk area, or even in a narrow sidewalk area, the electric wire utility tunnel (the electric wire utility tunnel). It is possible to bury a utility tunnel).

It is sectional drawing of the road structure which shows one Embodiment of this invention. It is a top view of the lid device for the underground structure. It is a cross-sectional view of the same short vertical wall. It is a cross-sectional view of the first vertical wall. It is sectional drawing of the 2nd vertical wall. It is a side view of the second vertical wall. It is a process diagram of the road structure, (a) is a state where a fixed-positioned street culvert is installed on the sidewalk area side of the sidewalk area, and (b) is a state where the street culvert is removed and necessary excavation is performed. In the state of being applied, (c) is a state in which the lower basin of the electric wire utility tunnel is embedded after the necessary excavation is performed. It is a process diagram of the road structure, (d) is a state where the base of the receiving frame is placed above the upper opening of the lower basin of the electric wire utility tunnel, and (e) is the outer rib on the second vertical wall. , The state where the utility tunnel is placed, (f) is the state where the excavation performed in (b) is backfilled and the paving of the roadway area and the sidewalk area is completed.

Hereinafter, a lid device for an underground structure according to an embodiment of the present invention and a road structure using the lid device for an underground structure will be described with reference to FIGS. 1 to 8. As shown in FIG. 1, the underground structure lid device 1 is used for the electric wire utility tunnel (the main body of the electric wire utility tunnel special portion) constructed on the road 2. In this case, the electric wire utility tunnel 3 is a pipeline buried in the length direction L of the road 2 and an inspection port arranged on the upper side of the electric wire utility tunnel special portion lower basin 10 arranged between the pipelines (described later). , A lid device 1 for an underground structure having a lid opening 27, also referred to as a special portion).

The road 2 of the present embodiment includes a roadway area 4 and a sidewalk area 5, and a street ditch (L-shaped gutter) 6 is installed on the sidewalk area 5 side of the roadway area 4. Hereinafter, the L-shaped gutter is referred to as a street ditch 6. The street culvert 6 has a general structure, and its cross section is block-shaped.

Specifically, the street culvert 6 integrally includes one end side area 46 on the sidewalk area 5 side and the other end side area 46A on the roadway area 4. The one end side region 46 is formed in a vertically long rectangular shape, and the other end side region 46A is formed in a horizontally long rectangular shape. The rise height of the one end side region 46 is set higher than the rise height of the other end side region 46A.

The other end side region 46A on the roadway area 4 side has a bottom surface 7, and the one end side region 46 on the sidewalk area 5 side has a side surface 8 (one end) rising with respect to the bottom surface 7 in the width direction W on the road 2. It has a side surface of the side region 46). Further, the one end side region 46 and the other end side region 46A have an upper surface 9 (upper end portion), the upper surface 9 of the one end side region 46 is flat, and the upper surface 9 of the other end side region 46A is flat. It is formed to be inclined toward the sidewalk area 5 to allow rainwater to flow.

As described above, the electric wire utility tunnel 3 includes an electric wire utility tunnel special portion lower basin (hereinafter referred to as an electric wire utility tunnel lower basin) 10 and an underground structure lid device 1 used as an inspection port. Here, the electric wire utility tunnel Masu 10 will be described. The electric wire utility tunnel bottom basin 10 has a general configuration, and the electric wire utility tunnel bottom basin 10 is buried in the ground.

The electric wire utility tunnel bottom basin 10 includes a bottom wall 11 having predetermined dimensions along the width direction W and the length direction L (see FIG. 2) of the road 2. The electric wire utility tunnel lower basin 10 is erected from both side ends in the width direction W of the bottom wall 11 and includes side walls 12 and 13 on both sides along the length direction L. Further, the electric wire utility tunnel lower basin 10 is erected from both side ends of the bottom wall 11 in the length direction L, and includes other side walls 14 on both sides along the width direction W.

The upper end surfaces of the one side wall 12, 13 and the other side wall 14 are substantially the same plane (same height), and the region surrounded by the upper end portions of the one side wall 12, 13 and the other side wall 14 is referred to as the upper opening 15. .. Further, the width direction W, the length direction L, and the height dimension of the side wall (one side wall 12, 13 and the other side wall 14) of the bottom wall 11 are arbitrarily selected according to the construction situation (environment).

Next, the configuration of the lid device 1 for the underground structure will be described. The underground structure lid device 1 is arranged above the upper opening 15 of the electric wire utility tunnel lower basin 10.

The lid device 1 for an underground structure is formed in a rectangular frame shape in a plan view (see FIG. 2), and is attached to a receiving frame 16 mounted on the upper end surfaces of the one side wall 12, 13 and the other side wall 14, and the receiving frame 16. A lid 17 is provided.

As described above, the underground structure lid device 1 is arranged above the upper opening 15 of the electric wire utility tunnel lower basin 10 to be buried, and the underground structure lid device 1 is also embedded, but the receiving frame. The upper end surface B of 16 (vertical wall described later) and the upper end surface C of the lid 17 are exposed to the ground.

The receiving frame 16 includes a base portion 18 and a vertical wall 19. The pedestal 18 is formed of a rectangular frame-like body in a plan view and has a plate shape along the horizontal direction, and has a shape along the upper end surfaces of the side walls 12 and 13 on one side and the side wall 14 on the other side. The width dimension of the base portion 18 is formed to be smaller than the width dimension of the one end side region 46 in the street culvert 6.

As shown in FIG. 2, the base portion 18 includes longitudinal side portions 20 and 21 along the length direction L of the road 2 and short side portions 22 along the width direction W of the road 2. Notches 23 extending from the outside to the inside of the frame are formed on the plate surfaces of the longitudinal side portions 20 and 21 at predetermined intervals in the length direction L. Further, one notch 23 from the outside to the inside is formed on the plate surface of the short side portion 22.

In these notches 23, anchor bolts 24 (see FIG. 1) are inserted through the upper end surfaces of one side wall 12, 13 and the other side wall 14 of the electric wire utility tunnel bottom basin 10, and the base portion 18 is inserted into one side wall 12, 13 and the other. It is for fixing to the upper end surface of the side wall 14.

The vertical wall 19 is erected from the inner end portion inside the frame of the base portion 18, and has a longitudinal vertical wall 25 corresponding to the longitudinal side portions 20 and 21 and a short side portion 22 as shown in FIG. It is provided with a short vertical wall 26 corresponding to the above. The upper end surfaces B of the longitudinal vertical wall 25 and the lateral vertical wall 26 are formed in substantially the same plane. Further, the height dimension of the vertical wall 19 from the pedestal portion 18 is formed longer than the horizontal dimension of the pedestal portion 18.

As shown in FIG. 2, the inside of the long vertical wall 25 and the short vertical wall 26 is a lid opening 27, and the lid opening 27 has a lid hook 28 on which the outer peripheral portion of the lid 17, which will be described later, is placed. It is formed. That is, a flat and rectangular lid hook 28 is formed inside the long vertical wall 25 and the short vertical wall 26.

Each of the short vertical walls 26 has a symmetrical shape. As shown in FIG. 3, a plurality of outer ribs 29 in the vertical direction are arranged on the outside of the short vertical wall 26 so as to avoid the notch 23. The outer rib 29 has a triangular shape formed from the outside of the short vertical wall 26 to the base portion 18.

As shown in FIG. 2, the longitudinal vertical wall 25 is composed of a first vertical wall 30 on the roadway area 4 side and a second vertical wall 31 facing the first vertical wall 30 in the width direction W. As shown in FIG. 4, a plurality of vertical ribs are arranged on the first vertical wall 30. A plurality of ribs are arranged so as to avoid the notch 23. This rib includes an outer rib 32 and an inner rib 33. The outer rib 33 is formed from the outside of the first vertical wall 30 to the base portion 18, the upper portion of the outer rib 33 is arranged below the upper end surface A of the first vertical wall 30, and the lower end thereof is on the base portion 18. They are arranged and formed in a substantially square shape. The inner rib 33 is inside the first vertical wall 30 and has a triangular shape extending from the lower end of the lid hook 28 to the lower end of the first vertical wall 30.

Since the first vertical wall 30 and the base portion 18 are loaded by the earth pressure, the inner rib 33 and the outer rib 32 have a function of reducing the load due to the earth pressure on the base portion 18 and the first vertical wall 30. The inner rib 33 and the outer rib 32 reinforce the first vertical wall 30 and the base portion 18.

As shown in FIGS. 5 and 6, a plurality of vertical ribs are arranged on the second vertical wall 31. A plurality of ribs are arranged so as to avoid the notch 23. This rib includes an outer rib 34 and an inner rib 35. The outer rib 35 is formed from the outside of the second vertical wall 31 to the base portion 18, the upper end surface 34a of the outer rib 34 is arranged largely below the upper end surface A of the second vertical wall 31, and the lower end is the base. It is arranged in the portion 18 and is formed in a substantially square shape. The upper portion of the outer rib 32 of the first vertical wall 30 and the upper end surface 34a of the outer rib 34 of the second vertical wall 31 are set lower than the upper end surface 34a of the outer rib 34 of the second vertical wall 31. .. As will be described later, a street culvert 6 is placed on the outer rib 34 of the second vertical wall 31. The inner rib 35 is inside the second vertical wall 31 and has a triangular shape extending from the lower end of the lid hook 28 to the lower end of the second vertical wall 31.

Since the second vertical wall 31 and the pedestal 18 are loaded by earth pressure and the street culvert 6, the inner rib 35 and the outer rib 34 apply the load due to earth pressure or the like to the pedestal 18 and the second vertical wall 31. The inner rib 35 and the outer rib 34 reinforce the second vertical wall 31 and the base portion 18.

Here, the height of the second vertical wall 31 is set to be equal to or higher than the height of the street culvert 6, and the height of the second vertical wall 31 from the upper end surface 34a of the outer rib 34 to the upper end surface A of the second vertical wall 31. The height is substantially the same as the height of the one end side region 46 of the street culvert 6.

As shown in FIG. 2, the lid 17 is detachably attached to the inner lid opening 27 of the longitudinal vertical wall 25 and the lateral vertical wall 26. The lid 17 has a general configuration, and as shown in FIG. 1, a rectangular lid frame 40, a lid surface portion 41 arranged on the exposed surface side, and a lid surface portion 41 arranged on the lower side of the lid surface portion 41. It is provided with a reinforcing rib 42 arranged in the width direction W and the length direction L. Then, the lower end portion of the lid frame 40 is brought into contact with the lid hook 28 from above.

The above-mentioned lid device 1 for an underground structure is used on the upper side of the electric wire utility tunnel lower basin 10 to form the road structure 45 of the present embodiment.

The general configuration of the road structure 45 is to bury the electric wire utility tunnel basin 10 in the sidewalk area 5 with respect to the street culvert 6 whose position is fixed. At this time, the electric wire utility tunnel bottom basin 10 is buried so that one of the side walls 12 and 13 is arranged on the lower side of the street culvert 6. Further, the underground structure lid device 1 is placed above the upper opening 15 of the electric wire utility tunnel lower basin 10. At this time, the base portion 18 of the underground structure lid device 1 (reception frame 16) is inserted below the one end side region 46 of the street culvert 6. This one end side area 46 is the area of the sidewalk area 5 in the street culvert 6.

Specifically, the construction process of the road structure 45 will be described with reference to FIGS. 7 and 8.

(1) FIG. 7A shows a state in which the street culvert 6 whose position is determined is installed on the sidewalk area 4 side of the sidewalk area 5. At this time, the sidewalk area 5 is G.I. L. (Ground level).
(2) In FIG. 7 (b), in a state where the street culvert 6 is removed and the necessary excavation T is performed, as shown in the next step (c), below the planned installation area T1 where the street culvert 6 is installed. On the other hand, it is removed so that the side wall 12 is located.
(3) FIG. 7 (c) shows a state in which the electric wire utility tunnel bottom basin 10 is embedded after the necessary excavation T is performed. At this time, the side wall 12 is arranged below the planned installation area T1 where the street culvert 6 is installed. In this case, in the next step shown in (d) below, the lower part is such that the outer rib 34 of the second vertical wall 31 of the underground structure lid device 1 is located below the planned installation area T1.
(4) FIG. 8 (d) shows a state in which the base portion 18 of the receiving frame 16 is placed above the upper opening portion 15 of the electric wire utility tunnel lower basin 10. That is, the base portion 18 of the receiving frame 16 is placed on the one side wall 12, 13 and the other side wall 14 of the electric wire utility tunnel lower basin 10. At this time, the outer rib 34 on the outside of the second vertical wall 31 is arranged below the planned installation area T1 of the roadway area 4, and the base portion 18 is positioned below the planned installation area T1. Then, the anchor bolt 24 is inserted into the notch 23, and the height is set to G.I. L. Then, the base portion 18 is fixed to the upper end surfaces of the one side wall 12 and 13 and the other side wall 14.
(5) FIG. 8 (e) shows a state in which the street culvert 6 is placed on the outer rib 34 of the second vertical wall 31. At this time, the one side wall 12 is arranged below the one end side region 46 of the street culvert 6. Further, the height dimension from the upper end surface 34a of the outer rib 34 to the upper end surface A of the second vertical wall 31 is designed in consideration of the height dimension of the one end side region 46 of the street culvert 6. (2) The upper end surface A of the vertical wall 31 and the upper end surface of the one end side region 46 of the street culvert 6 can be constructed at substantially the same height. Then, one end side region 46 of the street culvert 6 is accommodated in a specific region where the region above the base portion 18 (outer rib 34) and the region outside the frame from the second vertical wall 31 overlap. In this case, the mortar M is installed between the bottom surface 7 of the street culvert 6 and the outer rib 34. Further, the outer surface 31a of the second vertical wall 31 is in contact with the side surface 8 of the street culvert 6.
(6) FIG. 8 (f) shows a state in which the excavation T performed in FIG. 7 (b) is backfilled and the pavement of the roadway area 4 and the sidewalk area 5 is completed. Further, the lid body 17 is attached to the lid opening 27. The upper end surfaces of the side walls 12 and 13 and the other side wall 14 and the upper end surface C of the lid 17 are substantially the same plane (same height).

The electric wire utility tunnel 3 provided with the electric wire utility tunnel lower basin 10 and the lid device 1 for the underground structure, and the road structure 45 have been described above. According to the road structure 45, one side wall 12 and the base portion 18 fixed to the other side wall 12 are housed under the fixedly positioned street culvert 6. In short, the road structure 45 has a configuration in which one side wall 12 of the electric wire utility tunnel lower basin 10 is submerged under the street culvert 6, and as shown in FIG. 2, the street culvert 6 and the underground structure are viewed in a plan view. The lid device 1 overlaps with the side wall 12 by the width W in the width direction. That is, one side wall 12 of the electric wire utility tunnel 10 is configured to be closer to the roadway area 4, and the width of the electric wire utility tunnel 3 buried in the sidewalk area 5 is substantially reduced.

In this way, since one side wall 12 of the electric wire utility tunnel 10 is closer to the roadway area 4, when the electric wire utility tunnel 3 including the electric wire utility tunnel 10 is buried, an underground buried object is placed in the sidewalk area 5. Even if it exists, it is possible to construct it without relocating the underground buried object 50. Further, even if the sidewalk area 5 is narrow, it is possible to bury the electric wire utility tunnel 3.

Since there is no underground buried object under the street culvert 6, there is no need to relocate the underground buried object, and even if there is an underground buried object in the carriageway area 4, the width dimension of the base 18 is the street culvert 6. Since it is formed smaller than the width dimension of, it does not affect underground buried objects.

According to the present embodiment, in the specific area, since the upper surface 9 of the one end side area 46 of the street culvert 6 and the upper end surface A of the second vertical wall 31 are at the same height, these can be installed without a step. Since the sidewalk 8 of the sidewalk area 5 of the one end side area 46 is configured to be able to store the street culvert 6 in a state of being in contact with the outer surface 31a which is the outer side of the frame of the second vertical wall 31, the street culvert 6 can be stored. The width of the underground structure lid device 1 (electric wire utility tunnel 3) with respect to 6 is substantially reduced.

Further, since the upper end surfaces of the one side wall 12, 13 and the other side wall 14, and the upper end surface C of the lid 17 are substantially the same height (same height), they do not interfere with walking.

This is because the receiving frame 16 includes an outer rib 34 connected to an outer surface 31a outside the frame of the second vertical wall 31 and an upper surface of the base portion 18, and a specific region is formed above the outer rib 34. , While reinforcing with the outer rib 34, the street culvert 6 can be accommodated on it. Further, since the upper end surface 34a of the outer rib 34 is formed in a flat shape on which the bottom surface 7 of the street culvert 6 can be placed, it becomes easy to align the street culvert 6 with respect to the receiving frame 16 in the vertical direction.

As described above, since one side wall 12 of the electric wire utility tunnel lower basin 10 is close to the roadway area 4, even if there is an underground buried object in the sidewalk area 5 when burying the electric wire utility tunnel 3, the underground buried object. It is possible to construct the 50 without relocating it. However, in the road structure 45, the height dimension from the upper end surface 34a of the outer rib 34 on the second vertical wall 31 to the upper end surface A of the second vertical wall 31 substantially matches the height dimension of the street culvert 6. The outer surface 31a of the second vertical wall 31 is in contact with the side surface 8 of the street culvert 6. Therefore, in the road structure 45 of the present embodiment, the height is higher than that of the conventional receiving frame 16. Therefore, if the capacities of the electric wire utility tunnels 3 are the same, the height of the electric wire utility tunnel 3 including the electric wire utility tunnel lower basin 10 may have to be increased by the amount that the height is higher than that of the receiving frame 16. .. That is, the amount of excavation increases by the amount that the height of the electric wire utility tunnel bottom basin 10 must be increased in order to construct the road structure 45.

However, in the road structure 45 of the present embodiment, it is possible to construct the underground buried object 50 without relocating it, and the cost of increasing the excavation amount is smaller than the cost of relocating the underground buried object 50. Become. Moreover, the electric wire utility tunnel 3 can be installed even in a narrow sidewalk area.

The present invention can be modified in various ways without departing from the spirit of the present invention. In addition, the specific configuration of each part is not limited to the above embodiment. In the above embodiment, the outer rib 34 is formed on the side of the second vertical wall 31, but the outer rib 34 does not necessarily have to be provided. In this case, the bottom surface 7 of the street culvert 6 comes into contact with the base 18.

In the above embodiment, one end side area 46 of the street culvert 6 is accommodated as a portion accommodated in the specific area. However, both one end side area 46 and the other end side area 46A of the street culvert 6 can be accommodated.

In the above embodiment, the upper surface 9 of the one end side region 46 of the street culvert 6 and the upper end surface A of the second vertical wall 31 are at the same height, but the one end side region 46 of the street culvert 6 has been given. The upper surface 9 and the upper end surface A of the second vertical wall 31 do not have to be at the same height.

In the above embodiment, an example is given in which the outer surface 31a of the second vertical wall 31 is in contact with the side surface 8 of the street culvert 6, but the side surface of the street culvert 6 is opposed to the outer surface 31a of the second vertical wall 31. It can also be configured such that the 8 is separated outwards.

In the above embodiment, as a specific area, the bottom surface 7 of the street culvert 6 is brought into contact with the outer rib 34 of the second vertical wall 31, but the street culvert 6 is separated upward with respect to the outer rib 34. It can also be housed like this.

The street culvert 6 is not limited to the L-shaped gutter and may be U-shaped. Further, although an example of a rectangular frame-shaped member is given as the receiving frame, it may be a circular receiving frame in a plan view.

1 ... Underground structure lid device, 2 ... Road, 3 ... Electric utility tunnel, 4 ... Road area, 5 ... Sidewalk area, 6 ... Street culvert, 7 ... Bottom, 8 ... Side, 9 ... Top, 10 ... Electric wire common Masu Mizoshita, 11 ... bottom wall, 12, 13 ... one sidewalk, 14 ... other sidewalk, 15 ... upper opening, 16 ... receiving frame, 17 ... lid, 18 ... base, 19 ... vertical wall, 25 ... longitudinal vertical Wall, 26 ... Short vertical wall, 27 ... Lid opening, 28 ... Lid hook, 29 ... Outer rib, 30 ... First vertical wall, 31 ... Second vertical wall, 31a ... Outer surface, 32 ... Outer rib, 33 ... Inner rib, 33 ... Outer rib, 34 ... Outer rib, 34a ... Upper end surface, 35 ... Inner rib, 35 ... Outer rib, 40 ... Lid frame, 41 ... Lid surface, 45 ... Road structure, 46 ... One end side Area, 46A ... other end side area, 50 ... underground buried object, A ... upper end surface, B ... upper end surface, C ... upper end surface, L ... length direction, T ... excavation, T1 ... planned installation area, W ... width direction

Claims (5)

It is buried in the sidewalk area of a road that has a roadway area and a sidewalk area and has a utility tunnel at the widthwise end of the roadway area on the sidewalk area side, and stands from the bottom wall and the widthwise end of the bottom wall. It is a lid device for an underground structure attached to the upper side of the upper opening of the electric wire utility tunnel lower basin having a sidewalk and an upper opening, and is installed in a frame-shaped receiving frame and the receiving frame. With a lid,
A base portion mounted on the upper end of the side wall of the electric wire utility tunnel lower basin and a vertical wall rising from the inside of the frame of the base portion are provided.
The specific area where the area above the pedestal and the area outside the frame from the vertical wall overlap is configured to accommodate at least a part of the one-sided area on the sidewalk area side of the street culvert. A lid device for underground structures. The rising height of the vertical wall is set to be equal to or higher than the height of the one end side region of the street culvert.
In the specific area, the upper end of the one end side area of the street culvert and the upper end of the vertical wall are at the same height, and the sidewalk area of the one end side area is outside the frame of the vertical wall. The lid device for an underground structure according to claim 1, which is configured to be able to store the street culvert in a state of being in contact with the outer surface. The receiving frame includes ribs connected to an outer surface of the vertical wall outside the frame and an upper surface of the base portion.
The lid device for an underground structure according to claim 1 or 2, wherein the specific area is formed above the rib. The lid device for an underground structure according to claim 3, wherein the upper end portion of the rib is formed in a flat shape on which the bottom surface of the street can be placed. A road structure characterized in that the one end side region of the street culvert is housed in the specific area of the lid device for an underground structure according to any one of claims 1 to 4.

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