JP2532651Y2 - Concrete formwork for building slope protection structures - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a concrete formwork, especially for constructing a slope protection structure to be installed on the ground when constructing a slope protection structure. A concrete formwork.

[Conventional technology]

Form the formwork in a lattice shape to extend vertically and horizontally along the ground,
2. Description of the Related Art A concrete structure (hereinafter, simply referred to as a concrete structure) for constructing a slope protection structure in which a reinforcing bar is arranged in this formwork and then concrete is poured and constructed has been conventionally known.

In recent years, in constructing the concrete structure, a structure has been devised in which the formwork is formed of expanded metal and the strength of the concrete is increased by its tough structure.

In the construction of such a concrete structure, as shown in FIG. 4, the expanded metal 1 is arranged in a lattice shape so as to extend vertically and horizontally along the ground 2.

This expanded metal 1 is manufactured by pulling a thin steel plate with fine notches alternately and then expanding it in a wire mesh shape. The steel sheet rolls are cut out alternately while being sequentially fed out, expanded, and cut into predetermined dimensions. Therefore,
The expanded metal 1 having a length of 1829 mm is arranged vertically and horizontally along the ground 2.

There is also a steel plate with a width of 2438 mm as a special order, but it has not been generalized due to the inconvenience of a short delivery time. In addition, since this special order product is not a roll material, during the expanding process, the processing device must be stopped each time and the steel plate must be inserted into the processing device, so continuous processing cannot be performed.
There was an inconvenience that the work was complicated and required man-hours.

Furthermore, there is also a disadvantage that when this custom-made product is cut, the size fraction is increased and the material cost is uneconomical.

Therefore, even if the dimensions of the expanded metal 1 formed of a steel plate of a fixed length are short, it is more cost effective to overlap these ends and spot-weld them together, and to use them together.

[Problems to be solved by the invention]

By the way, expanded metal 1 as the frame
As shown in FIG. 5, the end portions in the longitudinal direction are sequentially overlapped, and the overlapped portions are connected by spot welding to be connected. Therefore, since the formwork 3 becomes discontinuous at the lap joint portion and the mesh of the expanded metal 1 is cut off in the middle by cutting, it is difficult to finish the surface finish after concrete casting.

In addition, since the ground 2 such as a slope has unevenness, the height of the frame body arranged vertically and horizontally along the ground 2 is likely to have a step.

Therefore, the step of the joint between the frames formed of the expanded metal 1 must be corrected by the surface finish after the concrete is cast, and the workability is reduced.
There was a problem that construction costs increased.

The above-mentioned problems are the same in the case of a normal crimp wire net, and by adding a crimp wire net of an appropriate length,
In the case of sequentially overlapping and connecting by welding, as in the case of the expanded metal wire mesh, the formwork 3 becomes discontinuous at the lap joint portion, so that it was difficult to perform surface finishing after concrete casting. In addition, the height of the frames arranged vertically and horizontally along the ground 2 such as a slope was easy to have a step.

In view of the problems described above, the present invention eliminates the step of the joint portion between the frames when forming the frame of the concrete structure with a fixed-length metal mesh such as an expanded metal mesh or a crimp wire mesh. Provided is a concrete formwork for constructing a slope protection structure capable of forming a finished formwork surface, improving workability of surface finish after concrete casting, and reducing construction cost. It is intended to be.

[Means for solving the problem]

In order to achieve the above object, a concrete formwork for constructing a slope protection structure according to the present invention includes a frame formed by sequentially connecting longitudinal ends of a plurality of standard-length wire meshes, and a frame formed on each frame. And a corner member for adjusting unevenness of the joint portion joined to the edge.

[Action]

According to the configuration of the present invention described above, the discontinuous joints of the fixed-length metal mesh that are sequentially connected and extended at the longitudinal ends thereof are provided with the irregularity adjustment provided at each upper edge of the frame. The frame is reinforced by a reinforcing bar that is continuous by the corner members for use and is disposed between the frames.

As a result, a continuous form-finished surface having no steps is formed at the joint portion of the standard-size metal mesh, thereby improving workability of the surface finishing and reducing the construction cost.

〔Example〕

Hereinafter, a preferred embodiment of a concrete formwork for constructing a slope protection structure according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the frame 11 of the concrete formwork 10 for constructing the slope protection structure of the present invention is opposed to the ground 12 and is erected in two sections. I have. This frame 11
Although a fixed-length wire mesh such as a crimp wire mesh or an expanded metal mesh may be used, in the present embodiment, the wire mesh is formed of expanded metal 11a having excellent toughness.
A so-called fixed-size object with a length of 9 mm is used. The expanded metal 11a extends along the ground 12 by sequentially connecting its longitudinal ends.

Specifically, in order to construct a grid-like concrete structure extending vertically and horizontally along the ground 12 such as a slope, the expanded metal 11a extends vertically and horizontally along the ground 12 to form a grid. Will be arranged.

Between these opposing expanded metals 11a,
A horizontal reinforcing bar 13a and a vertical reinforcing bar 13b are provided for maintaining a predetermined interval therebetween and for reinforcing the concrete aggregate.

Further, a corner member 14 for adjusting unevenness is provided along each upper end edge of the opposed expanded metal 11a.

As shown in FIG. 3A, in the first embodiment of the concrete formwork 10 for constructing the slope protection structure according to the present invention, the corner member 14 for adjusting unevenness has a rectangular cross section. It is formed by a band material having. Further, a long linear material wound on a drum or the like is used as the band material. The unevenness adjusting corner member 14 made of this strip is fixed to the outside of each upper edge of the expanded metal 11a by spot welding or the like.

 Next, the operation of the first embodiment will be described.

When a concrete structure is to be constructed vertically and horizontally along a ground slope 12 such as a slope, the frame 11 made of the expanded metal 11a is disposed at a location corresponding to the construction position, as described above. The expanded metal 11a has a tough structure because there is no discontinuous portion in its manufacture alone, and the amount of reinforcing bars provided in the mold can be reduced.

Incidentally, since the ground 12 such as a slope is not flat but has irregularities (this is referred to as unevenness), a step is easily formed in the height of the frame 11 arranged vertically and horizontally along the ground 12.

In addition, since the connection of the expanded metals is performed by overlapping the longitudinal ends and spot welding, the lap joint portion of the expanded metal 11a is discontinuous.

The discontinuous joint portion 11b of the expanded metal 11a
As shown in FIG. 3 (A), it is made continuous by a line-shaped non-adjustment corner member 14 provided outside each upper edge portion.

For example, with respect to the step in the height direction of the expanded metal 11a, the unevenness-adjusting corner member 14 is spot-welded to fit the highest expanded metal 11a, and the step in the thickness direction of the expanded metal 11a is Is mounted on the corner member 14 for spot adjustment by spot welding in accordance with the outermost expanded metal 11a. And this corner adjustment corner material
The width in the height direction of 14 is set in accordance with the largest step between the expanded metals, and the continuity is maintained as the length is longer like a winding.

As a result, a continuous form-finished surface without any step is formed at the joint portion of the expanded metal 11a, so that the workability of the surface finish can be improved and the construction cost can be reduced.

FIG. 3 (B) shows a second embodiment of the concrete formwork 10 for constructing a slope protection structure according to the present invention.

In this embodiment, the corner member 14a for adjusting irregularities
The windings having a circular cross section are employed, and the expanded metals 11a facing each other as in the first embodiment.
Is provided outside the upper edge.

Although the operation and effect of the second embodiment are basically the same as those of the first embodiment, this embodiment is particularly suitable when the step between the expanded metals is small.

Further, FIG. 3 (C) shows a third embodiment of the concrete formwork 10 for constructing a slope protection structure according to the present invention.

In the third embodiment, the corner member 14
As b, a wire-shaped member having a U-shaped cross section is adopted, and fitted to the upper end edge of the opposed expanded metal 11a.

The operation and effect of this embodiment are basically the same as those of the first embodiment.
Although the same operation and effects as those of the second embodiment are shown, this embodiment can be attached to the upper end edge of the expanded metal 11a with one touch.

However, it is necessary to set the width of the U-shaped linear member in the height direction of the U-shape so as to have a width in the height direction corresponding to the maximum step in the height direction between the expanded metals.

Although the present invention has been made in view of the inconvenience in manufacturing the expanded metal 11a, the present invention is naturally applied to a case where a crimped wire mesh or the like is used for the frame 11 and the lengths thereof are inconsistent. It is clear that this can be done.

[Effect of the invention]

As described above, according to the present invention, it is possible to form a continuous formwork surface by eliminating the steps of the joint portion between the molds of the concrete structure, and to improve the workability of the surface finish, It has an excellent effect that the construction cost can be reduced. Further, since the unevenness is supported by the corner member for adjusting unevenness, the step becomes strong.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a concrete form of the present invention, FIG. 2 is a side view showing an arrangement state of a concrete form of the present invention, and FIG. 3 is concrete of the present invention. FIGS. 3A and 3B are cross-sectional views of the first embodiment, FIG. 3B is a cross-sectional view of the second embodiment, FIG. 3C is a cross-sectional view of the third embodiment, FIG. FIG. 1 is a side view showing an arrangement state of a conventional concrete formwork, and FIG. 5 is a perspective view showing a main part of the conventional concrete formwork. 10 ... Concrete formwork, 11 ... Frame, 11a ... Expanded metal, 12 ... Ground, 14, 14a, 14b ... Corner member for unevenness adjustment.

Claims (4)

(57) [Scope of request for utility model registration] 1. A frame comprising a plurality of fixed-length metal meshes connected in order in a longitudinal direction thereof, and a corner member for adjusting unevenness of a joint portion joined to an upper edge of the frame. , Concrete formwork for building slope protection structures. 2. The slope protection structure according to claim 1, wherein the corner member for adjusting unevenness has a rectangular cross-sectional shape and is disposed on the outermost side of a frame. Concrete formwork for construction. 3. The slope protection structure according to claim 1, wherein the corner member for adjusting unevenness has a circular cross-sectional shape and is arranged on the outermost side of a frame. Concrete formwork for construction. 4. The method according to claim 1, wherein the corner member for adjusting unevenness has a U-shaped cross section and is fitted to an upper edge of a wire mesh. Concrete formwork for building surface protection structures.