JP2847641B2 - Method of forming concrete formwork for construction of slope protection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a concrete formwork for constructing a slope protection structure which is disposed on the ground, particularly when constructing a slope protection structure or the like.

[0002]

2. Description of the Related Art In order to construct a slope protection structure, a formwork is assembled in a lattice shape so as to extend vertically and horizontally along the ground, a reinforcing bar is arranged in the formwork, and concrete is poured into the formwork. (Hereinafter simply referred to as a concrete structure) has been conventionally known.

In recent years, when constructing the concrete structure, the formwork is formed from expanded metal,
A structure that enhances the strength of concrete was devised 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.

[0004] The expanded metal 1 is manufactured by pulling thin steel plates with fine cuts alternately and expanding them in a wire net shape. Cuts are made alternately while successively feeding out thin steel rolls of a fixed length, 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.

[0005] There is a steel plate with a width of 2438 mm as a special order product,
It is not generalized due to the inconvenience of late delivery. In addition, since this custom-made product is not a roll material, during the expanding process, the processing device must be stopped and the steel plate must be inserted into the processing device each time, so that continuous processing cannot be performed, and the work is complicated and requires many man-hours. There was an inconvenience. Furthermore, when this custom-made product is cut, there is a disadvantage that 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.

Meanwhile, as shown in FIG. 5, the expanded metal 1 as the frame body has its longitudinal ends 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.

[0007] Therefore, the step at the joint between the frames formed of the expanded metal 1 must be corrected by surface finishing after concrete casting, which lowers the workability and increases the construction cost. was there.

[0008] The above problems are the same in the case of a normal crimped wire netting. In the case where a crimped wire net of an appropriate length is added and successively overlapped and connected by welding, in the case of an expanded metal wire netting, Similarly to the above, since the formwork 3 becomes discontinuous at the lap joint portion, it was difficult to finish the surface finish 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 above-described problems, the present invention eliminates a step in a joint portion between frames when forming a frame of a concrete structure with various metal meshes such as an expanded metal mesh or a crimp wire mesh. Forming a continuous formwork finish surface, improving the workability of surface finish after concrete casting, and reducing the construction cost of a concrete formwork for constructing a slope protection structure. It is intended to provide a forming method.

[0010]

In order to achieve the above object, a method of forming a concrete formwork for constructing a slope protection structure according to the present invention is directed to a method of forming a concrete formwork in which longitudinal ends are sequentially connected and extended. Erected on the ground facing each other at predetermined intervals, and a vertical reinforcing bar is disposed along the longitudinal direction between the opposing metal meshes, and a horizontal bar for maintaining the metal mesh at the predetermined interval. A frame is formed by arranging a reinforcing bar, and then, when joining the corner member for adjusting unevenness to the upper edge portion of the frame, the corner member for adjusting unevenness is placed in a height direction between the wire meshes. It is set so as to have a width in the height direction corresponding to the maximum step, and the upper edge of the corner member for adjusting unevenness is positioned so as to match the upper edge of the highest wire mesh, and is arranged on the outermost side of the frame body. It was configured to be.

The corner member for adjusting unevenness has a rectangular cross section, a circular cross section, or a U-shaped cross section.

In the case where the corner member for adjusting unevenness has a U-shaped cross section, the corner member is fitted to each wire mesh downward from the upper end edge thereof, and the height of the U-shape is adjusted. The width in the direction is configured so as to have a width in the height direction corresponding to the maximum step in the height direction between the connected metal meshes.

According to the configuration of the present invention described above, the discontinuous joint portions of the wire mesh whose longitudinal ends are sequentially connected and extended are connected to the continuous uneven portions provided on the outside of each upper edge portion. The frame is made continuous by the adjusting corner members, and the frame is reinforced by the reinforcing bars provided between the frames. As a result, a continuous form-finished surface having no steps is formed at the joint portion of the wire mesh, so that the workability of the surface finish is improved and the construction cost is reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments for forming a concrete formwork for constructing a slope protection structure according to the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2, a frame 11 of a concrete formwork 10 for constructing a slope protection structure formed according to the present invention is opposed to a ground 12 and is erected in two rows. This frame 11
Although various wire meshes such as a crimp wire mesh and an expanded metal wire mesh may be used, in this embodiment, the wire mesh is made of expanded metal 11a having excellent toughness.
A so-called fixed length object with a length of mm is used. The expanded metal 11 a is extended along the ground 12 by sequentially connecting its longitudinal ends.

Specifically, in order to construct a lattice-shaped 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. They are arranged in a grid.

These opposing expanded metals 11
Between a, a horizontal reinforcing bar 13a and a vertical reinforcing bar 13b are provided to maintain a predetermined interval therebetween and to serve as a concrete aggregate to reinforce it.

Next, at each upper end edge of the opposing expanded metal 11a, a linear continuous irregularity adjusting corner member 14 is provided along the upper end edge.

As shown in FIG. 3A, in the first embodiment of the concrete formwork 10 for constructing a slope protection structure formed according to the present invention, the corner for unevenness adjustment is used. The member 14 is formed of a strip having a rectangular cross section. Further, a long linear material wound on a drum or the like is used as the band material. The non-adjustment 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 constructing a concrete structure vertically and horizontally along the slope of the ground 12 or the like, as described above, the expanded metal 1 is placed at a location corresponding to the construction position.
A frame 11 made of 1a is provided. 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.

Since the ground 12 such as a slope has irregularities (this unevenness is referred to as non-landing in the present invention), the frame 11 arranged vertically and horizontally along the ground 12.
It is easy to form a step at the height of the building. In addition, since the connection between the expanded metals is performed by overlapping the ends in the longitudinal direction and performing spot welding, the lap joint portion of the expanded metal 11a is discontinuous.

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

For example, regarding the step in the height direction of the expanded metal 11a,
1a, the unevenness-adjusting corner member 14 is spot-welded and attached, and the step in the thickness direction of the expanded metal 11a is adjusted in accordance with the outermost expanded metal 11a. 14 is attached by spot welding. The width in the height direction of the corner member for unevenness adjustment 14 is set in accordance with the largest step between the expanded metals.
The continuity is maintained as the length is longer, such as a winding.

As a result, a continuous form-finished surface without a 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. 3B shows a second embodiment of a concrete formwork 10 for constructing a slope protection structure formed according to the present invention. In this embodiment, a winding having a circular cross section is adopted as the corner member 14a for adjusting unevenness, and the upper end edge of the expanded metal 11a facing the same as in the first embodiment. It is provided outside. Although the operation and effect of the second embodiment basically show the same operation and effect as those of the first embodiment, this embodiment is particularly suitable when the step between the expanded metals is small.

FIG. 3C is a concrete formwork 10 for constructing a slope protection structure formed according to the present invention.
This shows a third embodiment of the present invention. In the third embodiment, as the corner member 14b for adjusting unevenness,
The cross section employs a linear member having a U-shaped cross section, and is 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 and second embodiments. However, in this embodiment, the expanded metal 11a
Can be attached to the top edge of the device with a single 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.

The present invention relates to the expanded metal 11 described above.
Although it was created in view of the manufacturing inconvenience a, it is obvious that the present invention can be applied to a case where a crimped wire mesh or the like is used for the frame body 11 and the lengths thereof are inconsistent.

[0028]

As described above, according to the present invention, a continuous form-finished surface is formed by eliminating the step at the joint between the forms of the concrete structure, and the workability of the surface finish is improved. And an excellent effect that the construction cost can be reduced. Further, since the above-mentioned step is supported by the corner member, it becomes strong.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a concrete formwork formed by the present invention.

FIG. 2 is a side view showing an arrangement state of a concrete formwork formed according to the embodiment of FIG. 1;

FIG. 3 shows a concrete formwork formed according to the present invention, wherein (A) is a cross-sectional view of the first embodiment, (B).
Is a cross-sectional view of the second embodiment, and (C) is a cross-sectional view of the third embodiment.

FIG. 4 is a side view showing an arrangement state of a conventional concrete formwork.

FIG. 5 is a perspective view showing a main part of a conventional concrete formwork.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Formwork for concrete 11 Frame body 11a Expanded metal 12 Ground 14, 14a, 14b Corner member

Claims (4)

(57) [Claims] 1. A plurality of metal nets extended by connecting their longitudinal ends sequentially and standing on the ground at predetermined intervals, facing each other, along the longitudinal direction between the metal nets facing each other. A frame is formed by arranging a vertical reinforcing bar and arranging a horizontal reinforcing bar for maintaining the wire mesh at the above-mentioned predetermined interval, and then joining a corner member for unevenness adjustment to an upper edge portion of the frame. At this time, the unevenness adjusting corner member is set so as to have a width in the height direction corresponding to the maximum step in the height direction between the wire meshes, and the upper edge of the unevenness adjusting corner member is the highest. A method for forming a concrete formwork for constructing a slope protection structure, wherein the method is arranged so as to be aligned with an upper edge of a wire net and at the outermost side of the frame. 2. The method for forming a concrete formwork for building a slope protection structure according to claim 1, wherein the corner member for adjusting unevenness has a rectangular cross-sectional shape. 3. The method of claim 1, wherein the corner member for adjusting unevenness has a circular cross-sectional shape. 4. The longitudinal ends are sequentially connected and extended.
Multiple wire meshes standing on the ground facing each other at predetermined intervals
Between the opposed wire mesh along the longitudinal direction
Arrange the streaks and maintain the wire mesh at the above-mentioned predetermined interval
A frame is formed by arranging horizontal reinforcing bars,
When joining the corner member for unevenness adjustment to the upper edge of the frame
And, the corner member for unevenness adjustment has a U-shaped cross section.
And the height direction between the wire meshes
Has a width in the height direction corresponding to the largest step in
And fitted and placed from the top edge of the wire mesh
A method for forming a concrete formwork for constructing a slope protection structure , characterized in that :