JPH0718723A - Adjustable-slope road side ditch - Google Patents

Abstract

PURPOSE:To easily construct a road side ditch using precast concrete by a method wherein the major part of the upper side of the side ditch is fixed to improve safety and utilization of the upper side thereof, and unstableness and noise due to setting of a cover avoided and proper tractive force is provided even if the amount of ditch is small by providing an adjustable-slope double section having a decreased width at a lower water level, and the side ditch serves as an earth retaining wall in the roadbed condition of embankment. CONSTITUTION:The lower part of a precast concrete portal side ditch is supported against side pressure and a precast concrete adjustable bottom frame 2 which has rising parts on both sides nearly touching the inner side of the portal side ditch is built beforehand to constitute an adjustable slope small section so that a concrete is placed into the form most suitable for necessary drainage slope and drainage, and thereafter a portal side ditch 1 is mounted in combination therewith to form a double-section road side ditch. The adjustable bottom frame uses, if required, an adjustable bottom frame 3 with a protruding piece on one side and is connected to the lower end on the earth pressure side of the portal side ditch, whereby the road side which also serves as L- shaped earth retaining wall is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a freely sloping compound cross section in which the width of a low water portion is reduced so that an appropriate scavenging force can be maintained even when the drainage gutter of a road has a small amount of drainage.
At the same time, most of the upper surface is fixed to both side walls to eliminate rattling noise due to hanging lids, it is possible to install guard fences and curbs, guide landscape tiles, etc. to improve the safety and usage of road traffic, and further embankment. The present invention relates to obtaining a road gutter most suitable for structural protection of a road by using a structure which also serves as a retaining wall for a roadbed portion, and to obtain it easily and inexpensively by cast concrete.

[0002]

2. Description of the Related Art Conventionally, a road drainage gutter is formed by a precast concrete U-shaped gutter having a constant inner width and depth, and its upper surface is covered with a lid plate depending on how the road surface is used. In many cases, the required drainage gradient cannot be secured because the depth is constant, and there are drawbacks such as the rattling noise of the lid plate caused by the top traveling of the vehicle, and it is also impossible to use it as a soil retaining wall for the embankment roadbed. Is.

In addition, a precast concrete gate-type gutter that uses cast concrete in the lower part is also used.
In this case, although the drainage gradient on the bottom can be adjusted to a certain degree, the casting of concrete is difficult due to the limited work from the opening provided on the upper surface of the gutter. Since the finish cannot be expected and the width of the cross section of the water flow is constant, the scavenging force cannot be obtained when the water depth is shallow. Furthermore, when the roadbed is embankment and earth pressure acts, it cannot function as a retaining wall for retaining soil, and since the upper surface has many openings, it is not possible to improve the utilization.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in order to maintain a scavenging force even with a small amount of water, a small cross section of a low water portion is pre-constructed to an optimum slope, and then most of the upper surface is fixed to a gate-shaped gutter. It is intended to obtain a precast concrete gutter capable of appropriately forming an L-shaped retaining wall structure even when the gutter is placed in a multi-section and the installation condition of the gutter also serves as retaining soil for the embankment roadbed. .

[0005]

According to the present invention, since the lower part of the gutter is supported from the side earth pressure in combination with the gate-shaped gutter and a small cross section with a free gradient is formed, the rise of both sides which is almost inscribed in the gutter-shaped gutter is achieved. A variable bottom frame is constructed by laying a variable bottom frame that has it, placing concrete in a shape that is optimal for the required drainage gradient and drainage, and then placing a gate-shaped gutter in combination to form a multi-section road gutter. If necessary, one having a projecting plate on one side can be used to connect to the lower end of the gate-shaped gutter on the earth pressure side, thereby forming a structure that also serves as an L-shaped retaining wall. Thus, by selectively using the variable bottom frame that matches the conditions of the roadbed, the soil retaining / combined gradient cross-section gutter is obtained. In the case of a gate-type gutter that allows internal work with a large cross section, if the inner width is sufficiently larger than the low water part and the space between both sides of the variable bottom frame is secured, the space part should be punched on site. It may be a concrete finish and may have small steps appropriately. In addition, the gate-shaped gutter and the variable bottom frame having a projecting portion on one side may be combined so as to have the same width to form an L-shaped retaining wall with a simple box-shaped water passage section for retaining soil.

[0006]

Since the present invention has taken the above-mentioned means, the small cross section of the low-water portion of the cross section of the gutter water is cast into the variable bottom frame in the shape suitable for drainage gradient and drainage where the bottom concrete is required. Can be easily constructed. Next, the gate-shaped gutters are combined and placed to form a multi-section, but the combination engagement parts appropriately interpose mortar or packing, and further, the gate-shaped gutters on which the lateral pressure acts are formed by the variable bottom frame. Since it is supported from the inside as a bracing material, the mutual positions may be fixed with bolts. Also, in the case of using the gutter that also serves as the earth retaining wall of the roadbed, a variable bottom frame having a protruding plate on one side is used, and the bottom plate protrudes on the roadbed earth pressure side by the gate-type gutter and the variable bottom frame. After construction, at least the earth pressure side lower part of the gate-shaped gutter and the variable bottom frame are connected to be integrated as an L-shaped retaining wall. The road gutter obtained in this way is safe for traffic with most of the upper surface fixed, the utilization of the upper surface of the gutter is high, the rattling noise due to the lid plate does not easily occur, and the amount of water discharged from the road surface is small. Even in the case of, the flow capacity is secured in the small cross section of the low water part, sedimentation and retention is less likely to occur, and the gutter structure can also be used as a soil retaining wall as appropriate, which helps to maintain the road structure. Optimal.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described in more detail below.

1 and 2 show a construction state, 1 is a gate-shaped side groove, 2 is a variable bottom frame, and 3 is a variable bottom frame having a protruding plate on one side. A variable bottom frame is continuously laid on the base material 4, a filling material 5 such as a crushed crushed stone is filled, mortar joints are appropriately filled in the joint gaps on both sides, and then the bottom concrete 6 is struck to obtain the bottom surface. Finish the shape suitable for drainage slope and drainage. In this way, the gate-shaped gutter 1 is combined and placed on the variable bottom frame 2 or 3 constructed in advance to form a drain gutter of a compound cross section. Further, the side wall 7 on the earth pressure side and the variable bottom frame 3 are bolted and connected by the anchor fittings 20 to form an L-shaped earth retaining wall. The joint groove 10 is filled with mortar at the joint of the continuous gate-shaped gutters.

As shown in FIG. 3, the gate-shaped side groove 1 has both side walls 7 and 7 integrated with a top plate 8. In this embodiment, an inlet 9 is provided on the upper surface and a joint groove is formed on the end surface. 10 are provided. An engaging portion 11 for engaging the variable bottom frame is formed in the lower inner portion of the side wall, and a through screw embedded nut 12 horizontally penetrates the side wall and is anchored inside.

The variable bottom frame 2 has a plurality of bottom beams 14 each having a pedestal 13 as shown in FIG. 4 and the variable bottom frame 3 shown in FIG. 5, and they are connected continuously as necessary to prevent uneven settlement. A bolt hole 15 is provided to connect a variable bottom frame to be installed by bolts. Then, the rises 16 and 16 in which the lower part of the gutter is supported from the side earth pressure by being almost inscribed in combination with the gate-type gutter and the variable range of the thickness of the bottom concrete for forming the small cross section of the freely sloping low water part is added. Have Further, in this embodiment, a small step 17 is provided outside the rise on the same plane as the pedestal 13 with a small width. Further, the variable bottom frame 3 has a protruding plate 1 that serves as a bottom plate on the earth pressure side when it also serves as a retaining wall for retaining the earth.
8 is provided on only one side, and an embedded nut 19 for connecting to the gate-shaped gutter is anchored inside.

As shown in FIGS. 6, 7, 8 and 9, the packing 21 and the mortar 22 are used to join the gate-shaped side groove and the variable bottom frame. The height of the pedestal 13 and the side wall 7 is adjusted during the construction.
Interpose an iron plate piece, a wedge, etc. with the bottom surface of. If necessary, the fixing bolts 23 are used to support the lateral pressure to the gate-shaped gutter by the variable bottom frame. Further, as shown in FIG. 8, the gate-shaped gutter embedded nut 12 and the variable bottom frame embedded nut 19 are used. Are connected by the anchor fittings 20 to construct an L-shaped earth retaining wall.

[0012]

According to the present invention, since it has such a structure, it is possible to obtain a road gutter in which most of the upper surface is fixed, is safe for traffic, is highly utilized, and does not cause rattling of the lid plate.
At the same time, the cross section of the water flow is a multi-gradient gradient that is optimal for drainage so that the scavenging force is always maintained, and the variable bottom frames 2 and 3 are selected according to the conditions of the road surface to serve both as an embedding structure and an earth retaining wall. Since it can be appropriately constructed to have a different structure, it is possible to quickly eliminate road surface drainage and easily obtain a road gutter most suitable for road structural maintenance. Also, place the gate-shaped gutter on the variable bottom frame,
Immediately backfill both outer sides to apply compaction pavement and use for traffic. Furthermore, both gate-shaped gutters and variable bottom frame can be supplied at low cost because of the shape suitable for factory production, and for site construction Since it is easy to handle, it is an invention with great industrial effect.

[Brief description of drawings]

FIG. 1 is a notched slope view showing a construction state of a precast multi-section free-gradient road gutter.

FIG. 2 is a notched slope view showing a construction state of a precast concrete compound cross-section free-gradient road gutter also serving as a retaining retaining wall.

FIG. 3 is a perspective view of a gate-shaped gutter.

FIG. 4 is a perspective view of a variable bottom frame.

FIG. 5 is a perspective view of a variable bottom frame having a protruding plate on one side.

FIG. 6 is a sectional view taken along line aa of FIG.

7 is a cross-sectional view taken along the line bb of FIG.

8 is a sectional view taken along line c-c in FIG.

FIG. 9 is a sectional view taken along the line dd of FIG.

[Explanation of symbols]

 1 portal-type measuring groove 2 variable bottom frame 3 variable bottom frame having a protruding plate on one side 4 foundation material 5 filling material 6 bottom concrete 7 side wall 8 top plate 9 inflow port 10 joint groove 11 engaging part 12 through screw embedded nut 13 Cradle 14 Bottom beam 15 Bolt hole 16 Rise 17 Small step 18 Projection plate 19 Embedded nut 20 Anchor fitting 21 Packing 22 Mortar 23 Bolt

Claims (4)

[Claims] 1. A variable bottom frame (2), which also serves as a pedestal for a gutter-shaped gutter and a lower support beam, is laid in advance, and both side rises (16), (16) and bottom concrete (6) of the variable bottom frame are installed. After forming a low water level water passage with an appropriate slope and shape by placing,
All or part of the upper surface is fixed to both side walls, and the gate-shaped gutter (1) whose lower surface is open is formed on both side walls (7) and the lower part inside (7) is a variable bottom frame (16), (16). Precast concrete that is placed so that it is almost circumscribed on the bottom, and forms a box-shaped water-flowing cross section of a medium-high water level water flow section that is continuous above the low water level water cross section and is wider than that Gradient road gutter. 2. A variable bottom frame (3) having a projecting plate (18) on one side is used to connect the gate-shaped gutter (1) with an anchor fitting (20) to also serve as an L-shaped earth retaining wall. A precast concrete free-gradient road gutter according to claim 1, constructed as described above. 3. A variable bottom frame which forms a low water level water passage, and an outer side of the ascending (16), (16), and a lower inner side of both side walls (7), (7) of the mounted gate-shaped gutter. The step between the steps is finished in-situ concrete with an appropriate width and inclination.
The precast concrete free gradient gutter according to claim 2. 4. A variable bottom frame (3) having a protruding plate (18) on one side is used, and compatibility of the variable bottom frames (16), (16) is achieved.
The precast concrete universal gradient road gutter according to claim 2, wherein gate-shaped sulci of the same width as the inner width of the slab is placed in combination to construct a box-shaped water passage section.