JP5451709B2 - Free slope combined with bottom groove - Google Patents

Description

  The present invention relates to a bottomed side ditch also serving as a free-gradient, in which adjustment concrete is applied to an inner bottom such as a U-shaped side ditch as a road drainage facility, a box side ditch with a part of its upper surface opened.

Conventionally, a portal-shaped, bottomless precast concrete side gutter block was used, and a free-gradient side gutter that hits concrete with a certain thickness or more on the spot was used to form the inner bottom to the required channel gradient after laying on the concrete base. It has been.
This conventional method is mainly intended for free-gradient construction, but the side gutter block is gate-shaped and has no bottom surface, and the pre-constructed base concrete is indispensable and the construction period is long. is there.
On the other hand, for bottomed U-shaped side grooves and box side grooves, etc., the normal fixed gradient may be extended while the purpose is fixed gradient, and a part of it may be used as free gradient construction. In general, it is considered to be adjusted concrete casting with a minimum thickness of 5 cm or more.
In the case of U-shaped side grooves and box side grooves, the base concrete of the previous construction is unnecessary because it has a bottom, but the adjusted concrete has stable adhesion to the bottom of the side groove block against buoyancy due to water flow and minute bending that tends to occur at the block seam. In addition, it may not be suitable for impact such as scoops in maintenance and pressure water jet cleaning.
For this reason, improvements have been made to improve integration stability with adjustment concrete, such as providing a recess or opening on the bottom of the bottomed groove block or exposing a reinforcing bar to the opening, but it is not suitable for combined use with general products. It has become a special product and has not yet spread.

  JP 2002-235365 A

Problems to be solved by the invention

Side groove blocks with bottom surfaces such as U-shaped side grooves and box side grooves are generally used exclusively for fixed gradient construction, and can be used as is for free gradient construction using adjusted concrete.
Therefore, in the bottomed side groove, post-adjustment concrete to the bottom surface in the side groove is stable against buoyancy due to water flow, minute bending of the block joint, and impact during maintenance, and adhesion is maintained.

Means for solving the problem

In order to solve the above problems, the bottomed concrete gutter structure of the present invention has the following structure:
A plurality of small pits or embedded inserts are arranged on the flat surface of the inner bottom of the water flow, and the adjustment concrete fills and cures in each small pit or the bolt hole of the insert and becomes an anchor that contributes to adhesion stability. .
In addition, anchor rebars are fixed and planted by filling resin mortar or the like in small pit groups, or bolt anchors are screwed and planted in embedded inserts. It is intended to improve the stability of adhesion with emphasis on the area around the seam.

  Small pits or embedded inserts are arranged across the entire width of the horizontal part excluding the corner curved surface of the water flow inner bottom surface. Since there is no protrusion on the water flow part and there is no hindrance to the water flow, the water flow capacity is maintained.

Effect of the invention

In the free-gradient construction, adhesion to the adjustment concrete is improved, buoyancy and side groove block joints are stable, and a side groove structure suitable for maintenance management is obtained.
Since the gutter body has a bottomed structure, no base concrete is required for construction, the work period is shortened, and water leakage from the bottom does not occur.

  Even if a small pit or an embedded insert is provided on the inner bottom of the side groove, the water flow is not hindered, and there is no problem even in the combined use of presence or absence of adjustment concrete in the side groove extension.

  The formation of small pits or embedded inserts on the bottom surface of the bottomed groove is close to zero because of the conventional manufacturing process.

  Even if there are small pits or embedded inserts on the inner bottom surface, there will be no hindrance to the water flow, and even in the case of fixed gradient construction without adjusting concrete, there will be no change in hydraulic design, so it can be used in combination with conventional general distribution products.

  It is a notched slope figure which shows the Example of bottomed free-gradient construction by a U-shaped block.   1 is a cross-sectional view taken along line A-A in FIG. 1, in which the left half is construction without adjusting concrete, and the right half is laying with gradient adjusted concrete.   It is the top view (I) of the bottomed side groove | channel by the U-shaped block of FIG. 1, and a slope figure (B).   It is a perspective view of the Example by the bottomed side groove | channel of a box partial drop lid type, and a drop lid.

The U-shaped side groove and the box side groove are precast concrete having an inner width of 30 to 40 cm, an inner height of 10 cm, a length of 30 to 120 cm, a length of 1 m, 2 m, and the like, and are laid on the foundation with a fixed gradient.
The bottomed gutter, which is used in combination with a fixed slope and after-adjusted concrete as necessary, is provided with small pits or embedded anchors for planting bolt anchors evenly on the entire flat surface of the water flow inner bottom or near the seam. In order to improve the adhesion of the adjustment concrete to the emphasis, a plurality of small pits or bolt anchor planting inserts are arranged near the end of the side groove block, and the inner bottom of the water flow is formed into a rough surface.
The small pits are generally provided with a plurality of buried inserts having a diameter of 20 to 30 mm and a depth of 20 to 30 mm and a taper of 9 mm or less.
The anchor is planted only near the end of the side groove block on the bottom surface of the side groove. The rising surfaces of both side walls and the corner curved surface remain the same polished surface as the conventional general product, and the inner bottom surface is integrally attached with the adjusting concrete.

FIG. 1 shows the construction state of the example.
(1) is a bottomed side groove formed by a drop lid side groove block, and (2) is a drop lid.
As shown in FIGS. 1, 2, and 3, the bottomed groove (1) has a plurality of small pits (11) arranged at almost equal intervals on the inner bottom surface (3), and anchor reinforcing bars (13) are planted only near the joint. Is standing. The bottomed groove (1) is laid with a fixed slope on the foundation (25) with the upper surface aligned with the road.
And adjusting concrete (5) is laid according to the drainage gradient, and a bottomed free gradient side groove is constructed.
The bottomed groove (1) has small pits (11) arranged almost evenly on the entire inner bottom surface (3) to enhance adhesion to the adjustment concrete over the entire length and anchor rebars to the small pits (11) near the joint end. (13) is planted, and the structure is strengthened.

In this embodiment, a slit (10) is formed in a drop lid (2) by a small beam (9), and rainwater from the road surface continuously falls, and in addition, permeated water to the drainage pavement (21) It flows along the impermeable layer (22) from the vertical groove (24) of the side groove block to the drain hole (23) along an L shape.
In this way, the falling water from the road surface and the drainage pavement permeating water are discharged and drained by the optimum drainage gradient of the side grooves.

FIG. 4 shows another gutter block embodiment.
(1) is a bottomed groove formed by a box-side groove with a part of the upper surface opened. The upper surface is formed by an opening (7) and an upper plate (8), and the upper plate is slit by a small beam (9) (10). Is provided.
(2) is a drop lid, and the slit (10) is continuous with the upper plate (8) of the side groove block by the small beam (9).
The bottomed groove (1) is provided with an embedded insert (12) near the joint end of the inner bottom surface (3) formed on the rough surface, and the rough surface increases the adhesion with the adjusting concrete and is joined over the entire length. The adhesion near the part is reinforced by screwing the bolt anchor (14) to the embedded insert (12).
Further, the side groove block of this embodiment collects drainage pavement permeated water by a vertical groove (24) drainage hole (23) on one side, and drops water from the upper surface slit (10) to the optimum drainage gradient at the bottom of the side groove. It is what drains and drains.

The bottomed side groove of the present invention is suitable for construction only with a fixed gradient without any after-effects, and can be mixed with conventional general distribution products, and it may cause troubles in cleaning such as pressurized water injection in maintenance management. There are no restrictions on the spread.
Furthermore, since the formwork is the same as that of conventional products, it can be distributed at a low cost in production and supply as well as conventional road concrete products.

DESCRIPTION OF SYMBOLS 1 Bottomed side groove 2 Drop lid 3 Inner bottom surface 4 Rough surface 5 Adjustable concrete 6 Lid receiving step 7 Opening part 8 Upper plate 9 Beam 10 Slit 11 Small pit 12 Embedded insert 13 Anchor reinforcement 14 Bolt anchor 21 Drainage pavement 22 Impervious water Layer 23 Drain hole 24 Vertical groove 25 Foundation

Claims (1)

U-shaped side groove, box side groove, etc. Pre-cast concrete bottomed side groove, embedded with an embedded insert near the joint edge of the inner bottom surface formed on the rough surface in the free-graded bottomed side groove where after-adjustment concrete is applied if necessary A free-gradient bottom-grooved groove that is arranged and has a rough surface that enhances adhesion to the adjustment concrete over the entire length and strengthens the attachment near the joint by screwing the bolt anchor to the embedded insert. .

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