JP3179974U - Free slope combined side groove bottom forming frame - Google Patents

Abstract

An object of the present invention is to provide a frame for forming a bottom portion of a free-gradient side groove that is easy to adjust the gradient by placing adjustment concrete on the inner bottom of a gate-shaped side groove as needed as a drainage facility for a road.
A frame 1 is formed intermittently at the bottom of a side groove to form a groove 5A. A footing 4 for placing a gate-type side groove is provided at the lower part of each side. First, the upper surface of the foundation 30 is aligned with the road. Lay the frame on the top with a fixed slope. Then, the portal side groove main body 3 is continuously placed on the frame both sides footing 4 and the liner 17 mortar 18 thereon. In the case of the free gradient construction, the adjusting concrete 10 is further placed on the inner bottom according to the drainage gradient to construct the free gradient side groove.
[Selection] Figure 4

Description

  The present invention relates to a bottom-forming frame for a free-gradient combined side gutter, in which adjusting concrete is applied to an inner bottom of a portal side gutter as necessary as a drainage facility for a road.

Conventionally, a free-graded side gutter has a gate-shaped, bottomless precast concrete gutter block, which is laid on the cast-in-place base concrete and then covered with adjusted concrete of a certain thickness or more to form the inner bottom to the required channel gradient. A construction method is used in which an on-site punching is performed from the opening.
In this case, since the inner wall of the gate-shaped side groove is a vertical surface, even if the adjusted concrete has a minimum thickness of about 5 cm, it is restrained and stabilized by both sides and the inner bottom surface of the on-site cast-base concrete finish.
On the other hand, the fixed slope construction method that forms the bottom of the side groove to be installed directly on the foundation material by omitting the base concrete with a single precast frame, and the freedom to interpose the height-adjusted concrete on the portal side groove body mounting part Gradient methods are also widely used, and the bottom shape can be selected as appropriate, such as an inverted curved surface, a composite cross-section with a reduced width of the flat surface or low water part, etc. Loss of waiting for concrete hardening occurs in work process.
On the other hand, if the side groove main body is placed directly on the frame and the slope-adjusted concrete can be cast on the bottom surface of the side groove, the loss does not occur. Adhesion of adjusted concrete joints is less stable than the concrete construction method, especially at a minimum thickness of 5 cm, even if the inner wall of the gate-shaped side groove is a vertical surface, the restraint is not sufficient, and peeling / sliding occurs due to the impact of the scoop in maintenance management. In some cases, it may not be suitable for cleaning with pressurized water jets, and it has not become widespread.

  JP 2000-27277 A

Problems that the device tries to solve

A construction method in which the portal side groove main body is placed on the footings on both sides of the frame, and the slope is adjusted to the frame surface of the inner side of the side groove as needed. The base concrete is omitted, there is no waiting for the concrete to harden in the work process, and the post-adjustment concrete on the frame surface can be stably attached to the buoyancy due to water flow and impact during maintenance, and within the side groove extension It is assumed that there is no problem even if mixed concrete is mixed.
And even if there is an opening on the top, it is easy to adjust the gradient even in deep gate-shaped side grooves where adjustment concrete finishing work is difficult, and furthermore, it is possible to place adjusted concrete in a portal-shaped side groove without an upper opening and to form a free gradient To get a forming frame.

Means for solving the problem

In order to solve the above problems, the structure of the bottom forming frame of the present invention is:
Over the entire length of the frame surface, which is the inner bottom of the water flow, a plurality of straight grooves are arranged along the water stream to form a comb-like cross-section, and the post-adjustment concrete as a whole by increasing the adhesion area and biting the comb The adhesion and the grip are improved stably.
The grooves are arranged symmetrically within the full width of the frame surface, which is the bottom of the water flow, but are continuous or intermittent along the extension of the side groove after installation regardless of the direction of the upstream and downstream of the side groove. On the inner bottom surface when there is not, the water passage capacity is maintained without obstructing the water passage along the water flow.

  In addition, the frame surface, which is the bottom of water flow, is formed into a rough surface with rough mortar finish, zero slump concrete finish or convex or concave dot aggregate, etc., increasing the adhesion area and gripping with post-cast concrete In addition, it is assumed that the rough surface itself is close to the roughness of the top surface of the adjusted concrete on-site when there is no adjustment concrete strike.

  For concrete placement and free slope formation in a gate-shaped side groove with no opening in the upper part, it is necessary to fix the buried setting rule to the height of the adjustment slope along the individual frame surface or the entire bottom length of the rear side groove in the adjusted concrete. Forming a belt in advance, simultaneously casting and installing the gate-shaped side groove, and casting concrete from one open end, each time finishing according to the landfill setting rule or adjustment concrete belt, forming a free slope every time one side groove block is installed Then, the whole is completed sequentially.

Effect of device

Since the frame is laid on the base material, no base concrete is required and the construction period is shortened.
In free-gradient construction, adhesion to the adjustment concrete and grip are improved, it is stable against buoyancy, and a gutter structure suitable for maintenance management is obtained.

Due to the multiple grooves, the inner bottom of the side groove where the adjustment concrete is rooted and attached has an uneven comb-shaped cross section, but does not impede water flow, so there is no problem even if there is a mixture of adjustment concrete in the side groove extension. Does not occur.
Further, when the frame surface is formed with a rough surface, the water flow capacity is maintained without hindering the water flow.

  It becomes easy to work on deep side grooves where it is difficult to cast concrete and shape the slope. Furthermore, it is possible to form a free gradient even in a side groove without an upper surface opening.

  The formation of the groove and rough surface of the frame surface according to the present invention does not increase the cost because of the conventional manufacturing process.

  It is a notch slope figure which shows the Example of the free gradient side groove | channel which used the precast frame for the bottom part.   It is sectional drawing along the AA line of FIG.   It is a slope view of the frame in the embodiment of FIG.   It is sectional drawing which shows the Example of the bottom part formation which fixed the buried setting rule to the height of gradient adjustment along the full length of a water flow inner bottom frame surface.   It is sectional drawing which shows the Example of the bottom part which formed the adjustment concrete strip | belt in the height of gradient adjustment along the full length of a water flow inner bottom frame.   It is a perspective view which shows the other Example of a precast frame.

Usually, one or several types of portal side grooves are used as appropriate to form a drop in the entire side groove extension, but a frame having the same length as the main body is laid on the base material prior to the installation of the side groove main body.
After that, the gate-shaped side groove main body is placed on the footings on both sides of the frame, but the gate-shaped side groove has a water cross-section of 30-40cm in general, the inner wall is vertical, the inner height is 30-120cm in 10cm increments, and the side wall is external pressure load. Has a thickness corresponding to.
The length is supplied by precast concrete with a length of 2 m, etc., and laying mortar on the frame and laying with fixed gradient construction.
In free-gradient construction, adjusted concrete with a minimum thickness of 5 to 15 cm is placed on the bottom frame surface of the water flow cross section. The minimum thickness of 5 cm is the anchoring base and the height is adjusted up to 15 cm. Minutes.

The side groove of the present invention, which is used in combination with a fixed section and after-adjusted concrete as necessary, forms a comb-like cut portion by arranging a plurality of straight grooves along the water flow direction over the entire length of the water passage inner bottom frame surface As for the thing, the section of the groove is roughly trapezoidal with a top width of 10-15 mm and a depth of 10-15 mm, V-shaped, semi-circular, etc., and the center interval is 3-6 times the width above the groove, and is equally spaced. To do.
In the case of a rough surface, rough mortar finish in a mountain valley of about 3 mm or less, a finish of zero slump concrete, and a convex or concave dot aggregate shape.
The dots are gathered in an equidistant polka dot pattern or the like, and have a truncated cone shape, a spherical shape, etc., and generally have a diameter of 3 to 5 mm, a height of 1 to 3 mm, and a center interval of 10 to 30 mm.

Even if the inner surfaces of both sides of the side groove are vertical, they are smooth and have a certain restraining effect without coming into contact with the post-cast concrete and sliding upward. In addition, the adhesion area of the inner bottom surface is increased by the grooves, and the mortar including coarse aggregate is bitten in a comb-like shape on the bottom surface of the joint with the post-cast concrete to improve adhesion and grip.
In addition, even in the case of a rough surface, mortar will bite into the bottom surface of the post-cast concrete and adhesion and grip will improve. Wear it.

In the case of free-gradient construction, in a gate-shaped side groove without an upper opening, either a frame or a continuous frame is laid in advance, and then a buried setting rule is fixed to the height of the adjustment gradient along the entire length of the inner bottom, or an adjustment concrete strip is formed in advance. .
At the same time as installing and joining the portal side gutter body, concrete is thrown in from one open end, and each time it is leveled with a long pattern dragonfly or roller work tool etc. according to the filling setting rule or the top side of the adjustment concrete belt A free gradient is formed every time one is installed, and the whole is successively completed.
The embedding setting rule is mainly a flat plate of concrete embedding mold material, etc., which is almost the same length as the side groove block alone, and is adjusted in height and fixed to the inner bottom frame surface.

FIG. 1 shows the construction state of the example.
(1) is a frame, (2) is a side groove bottom, and (3) is a portal side groove body.
As shown in FIG. 3, the frame (1) is intermittently formed at the bottom of the side groove to form a groove (5A). The foot (4) for placing the gate-shaped side groove is provided at the lower part of each side. A frame is laid on the foundation (30) with a fixed slope according to the road.
The portal side groove main body (3) is continuously placed on the frame side footings (4) and (4) via the liner (17) and the mortar (18).
In the case of free-gradient construction, adjusting concrete (10) is further placed on the inner bottom according to the drainage gradient to construct a free-gradient gutter, but FIG. 4 uses the buried setting rule (20), and FIG. This is a case where the adjustment concrete strip (25) is used.

As shown in FIGS. 1, 2, 4 and 5, the portal side groove body (3) of this embodiment is integrated with a plurality of fixed beams (16), and a slit ( 15) is provided. Also, a lid receiving opening (6) is provided, and a concrete lid with slit (7) is set.
The frame (1) shown in FIG. 6 has a water passage bottom as a rough surface (5B).

The gate-shaped side groove bottom forming frame of the present invention is also suitable for construction with only a fixed gradient, and can be applied to general distribution-type side groove side groove products, and there is no restriction on the spread.
And it is also possible to assemble the gate-shaped side gutter body and the frame in the production factory and supply them as a box tube product, and to improve the workability in accordance with the field conditions.
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 Frame 2 Side groove bottom part 3 Portal side groove main body 4 Footing 5A Strip groove 5B Rough surface 6 Lid receiving opening 7 Concrete lid 10 Adjustment concrete 15 Slit 16 Fixed beam 17 Liner 18 Mortar 20 Burial setting rule 25 Adjustment concrete belt 30 Foundation

Claims (2)

  In a road side groove with a structure in which the gate-type side groove body is placed on the footing on both sides of the bottom part, it is used in combination with a fixed gradient section, and after adjustment concrete is applied as necessary, a bottom forming frame with a free gradient section, A free-gradient combined frame with a plurality of straight grooves on the bottom surface of the water in the water flow direction and a comb-shaped cross section.   In the road side groove of the structure where the gate-type side groove main body is placed on the footings on both sides of the bottom part, a bottom forming frame that after-adjusts the adjustment concrete as necessary to the inner bottom of the fixed gradient cross section, and makes the free gradient cross section, A free-gradient combined frame with a rough surface on the inner bottom frame.

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