JPH0234765B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a concrete construction method using masonry formwork, and more specifically, it is applicable to river bank protection, road improvement, housing development, prevention of collapse of steep slopes, etc. This invention relates to a concrete construction method using masonry formwork useful for concrete construction to form a masonry pattern on a retaining wall.

<Prior art and its problems> Conventionally, retaining walls for river revetments, road improvements, housing development, steep slope collapse prevention, etc. have been constructed using concrete, which has advantages in terms of durability, material cost, construction cost, etc. There are many. However, in such construction, if the surface is made flat, only the inorganic, gray concrete surface will be emphasized, which will damage the residential and natural environments.

Therefore, in recent years, there has been a strong desire to develop retaining walls that do not damage the residential and natural environments.
In order to meet these requirements, a formwork with a masonry pattern for concrete was devised to express the appearance of a masonry pattern on the surface of a poured concrete retaining wall (in 1983).
-129851 publication, Utility Model Application Publication No. 59-10345),
Various concrete construction methods for retaining walls using this material have been proposed.

The invention described in Utility Model Application Publication No. 57-129851 is
This masonry pattern formwork for concrete is formed by attaching a pattern material, preferably a semi-rigid polyurethane material, with a masonry pattern embossed onto the entire surface of a well-known metal form or an improved type thereof.

In addition, the idea described in Japanese Utility Model Application Publication No. 59-10345 forms a joint part representing masonry and a flat plate-shaped recess defined with this as the top surface, and the masonry of the joint part and the flat plate-shaped recess is This is a masonry pattern formwork for concrete, in which a pattern material made of a material such as semi-hard rubber or synthetic resin and having a thin thickness is attached to the surface of a top board.

Therefore, if concrete construction of a retaining wall is carried out using the former type of masonry pattern formwork for concrete, a large amount of patterned formwork will be used in the structure, resulting in a heavy overall weight. Construction work becomes difficult and dangerous, such as when working at heights where materials must be piled up.
There are various drawbacks, such as the need to use a crane or the like to carry out the work, which increases construction costs.

In addition, when constructing concrete for a retaining wall using the latter patterned formwork, the overall weight is slightly lighter because less patterned formwork is used, but it also makes it easier to work at heights. As the weight is not reduced, the former has the same disadvantages as the former.

Moreover, the masonry pattern formwork for concrete can only be formed with a thin pattern by forming joints and flat dish-shaped recesses on the surface of the top plate, and the shape of the top plate and the pattern form can be Since the shape and positional relationship between the two must be in a preset relationship, when constructing a retaining wall using the latter type of masonry pattern formwork for concrete, this pattern formwork cannot be easily cut on site. ,
Another drawback is that a wide variety of concrete masonry pattern forms must be prepared in advance to suit the shape of the retaining wall construction site.

Furthermore, since the top plate and the patterned material are used in an integrated manner, there is also the disadvantage that a smooth curved surface cannot be formed when constructing a curved retaining wall.

<Purpose> This invention was made in view of the above-mentioned problems, and is used in concrete construction to form a masonry pattern on the surface of retaining walls for river revetment, road improvement, residential land development, steep slope collapse prevention, etc. It is an object of the present invention to provide a concrete construction method using masonry formwork, which allows concrete construction to be easily carried out regardless of the width, height, degree of curvature, etc. of a retaining wall.

Another object of the present invention is to provide a concrete construction method using masonry forms that eliminates the need to prepare a wide variety of pattern forms and reduces construction costs. be.

<Means for Solving the Problems> In order to achieve the above object, the concrete construction method using the masonry formwork of the present invention includes a recessed part expressing the appearance of a masonry pattern on the concrete pouring side surface. Concrete formwork made of synthetic resin foam with higher and flat joints is temporarily attached to concrete panels one after another, and the plurality of concrete formworks are connected in at least one of the horizontal direction and the vertical direction. The first step is to place concrete between the concrete panels, the second step is to place concrete between the concrete panels, and after the concrete has hardened, the concrete panels and concrete formwork are dismantled and masonry is placed on the concrete surface. In a concrete construction method using a masonry form that includes a third step of forming a pattern, the main concrete form is formed into a rectangular shape,
The first step is carried out using a unit block having three concave portions defined in an irregular shape by the joint portions that intersect in a substantially T-shape in the middle.

<Function> According to the concrete construction method using masonry formwork with the above configuration, since unit blocks are used as concrete formwork, the weight of each formwork can be reduced. At the same time, by using the uneven parts for combination, assembly (allocation) with other unit blocks can be performed even more easily.

Furthermore, by using a plurality of unit blocks, it is possible to omit a wide variety of concrete forms that are required in advance according to the shape of the retaining wall, and it is possible to mass produce a small number of unit blocks. .

<Examples> Examples will be described in detail below with reference to the accompanying drawings showing examples.

FIG. 1 is a plan view of a unit block body as a main formwork for concrete that can be used in a concrete construction method using a masonry formwork, and FIG. 2 is a bottom view thereof.

In FIG. 1, a unit block 1 is formed of a molded product made of foamed polystyrene or other foam, which is formed by filling a mold cavity with foamed resin particles, heating and expanding them, and heat-sealing them together. It is formed into a rectangular shape in plan view.

As can be seen from FIG. 3, the unit block body 1 is
A joint for expressing the condition of masonry, in which a concave part 2 representing the surface shape of natural stone for masonry is formed on the surface of the concrete pouring side, and a top surface that is higher and flatter than the concave part 2 is formed between adjacent concave parts 2. It forms part 3.

When viewed from the layout shown in FIGS. 6 and 7, such a unit block body 1 has the above-mentioned joint portion 3 between one opposing side, that is, between the upper side and the lower side, and between the other side. Extending between opposite sides, that is, between both sides,
By intersecting the respective joint portions 3 in a substantially T-shape in the middle, three recessed portions 2 partitioned into irregular shapes are formed.

Next, as can be seen from FIG. 4, grooves 6 are formed on the bottom surface of the unit block body 1 at positions corresponding to the joint portions 3 on the surface side. This groove 6 is recessed on the bottom side according to the protruding state of the joint part 3, and is made by appropriately reducing the thickness of the joint part 3 protruding toward the front side of the unit block body 1 from the back side. Therefore, the weight of the unit block body 1 is reduced as much as possible. In addition,
The groove 6 can also be used as a recess for the peacon connection.

With such a configuration, it is possible to obtain a unit block body 1 that can express a so-called random masonry pattern (see FIGS. 6 and 7).

FIG. 5 shows a modification of the unit block body. The unit block body 1' shown in FIG. 5 has the same basic structure as the unit block body 1 shown in FIG.
Although three recessed portions 2 are provided which are partitioned into irregular shapes by joint portions 3 that intersect in a character shape, the difference is that they are formed in a square shape when viewed from above.

This unit block 1' is preferably used as one that is connected (allocated) to the unit block 1. For example, a plurality of unit blocks 1' are suitably distributed and used together with the unit block 1. By assembling them, it becomes possible to express a random stacking pattern as shown in FIG.

In addition, in the layout shown in FIG. 7, four identical unit blocks 1' are laid out in a square shape, and the concave portions 2 of the same shape are brought together on the center side of the square, thereby creating a joint area surrounding the center part in an annular shape. 3 and joint portions 3 radiating from the same center, a random stacking pattern with an accent different from the random stacking pattern shown in FIG. 6 is expressed.

Furthermore, in FIG. 7, an auxiliary block body 8 formed in a relatively small rectangular shape (including rectangles and squares) is allocated as a secondary concrete formwork to the above-mentioned main concrete formwork. This auxiliary block body 8 is a single recessed part 2 surrounded by a rectangular joint part 3, and is created due to space constraints when the unit block bodies 1 and unit block bodies 1' are allocated. It is fitted into the recess to form the assigned side portions of each unit block body 1, 1' into a straight line with good appearance.

In addition, in this embodiment, the unit block body 1
etc. are made of flexible foam, making it easier to construct curved retaining walls with concrete, and also making it easier to select locations for drainage pipes to be placed on retaining walls. It has the advantage that it can be done.

Here, FIG. 8 shows a state in which preparations for placing concrete have been completed, and FIG. 9 shows a state in which concrete is placed.

As can be seen from FIG. 8, in the preparation for concrete pouring here, the front concrete panel 9 of the concrete panels 9 and 9', which will serve as membrane plates of plywood boards spaced apart for concrete pouring.
In accordance with the size of the retaining wall to be concreted, for example, as shown in Figs. A unit block body 1, etc., which is appropriately allocated in at least one of the directions and whose bottom surface is temporarily attached with double-sided adhesive tape, nails, etc., is attached.

Also, for example, by pushing through the thin walled portion of the groove 6 and inserting the peakon 10 therethrough, the concrete panels 9, which are opposed to each other,
9' to each other, and attach the unit block 1 to the concrete panel 9' on the back side.
etc. will be more securely assembled.

After completing preparations for concrete pouring as described above, concrete 11 is poured between the concrete panel 9 to which the unit block bodies 1 etc. have been temporarily attached and the other concrete panel 9'. After solidification, the unit blocks 1, etc. and the concrete panels 9, 9' are dismantled.
This completes the concrete construction of the retaining wall, which has a random pile pattern on its surface.

Note that, if necessary, various design changes can be made without changing the gist of the present invention, such as interposing reinforcing bars or the like in the concrete placement space to provide sufficient strength.

<Effects> As described above, according to the concrete construction method using masonry formwork of the present invention, unit blocks that can sufficiently reduce the weight of each piece are used as concrete formwork. for example,
Even when performing concrete construction for large-area retaining walls, it is possible to use uneven parts for combination to facilitate assembly work with other unit blocks at relatively high places, and to significantly reduce risks. can.

Furthermore, by allocating multiple unit blocks, it is possible to easily perform concrete construction with a random piling pattern on the surface regardless of the width, height, degree of curvature, etc. of the retaining wall. The advantage is that it is not necessary to prepare concrete formwork of different sizes and shapes in advance to match the shape of the construction site, and it is possible to omit the high-mix, low-volume production of formwork, which increases construction costs. There is also. In other words, it has the unique effect of making it possible to mass-produce a small number of unit blocks and reducing construction costs.

[Brief explanation of drawings]

Figure 1 is a plan view of a unit block that can be used in the concrete construction method using masonry formwork, Figure 2 is a bottom view of the unit block, and Figure 3 is a partially cutaway perspective view of the unit block seen from the plane. Figure 4 is a partially cutaway perspective view of the unit block body seen from the bottom, Figure 5 is a plan view showing a modified example of the unit block body, and Figures 6 and 7 are the layout states of the unit block body. FIG. 8 is a vertical sectional side view showing a state in which concrete placement preparations have been completed, and FIG. 9 is a longitudinal sectional side view showing a concrete placement state. 1... Unit block body, 2... Concave portion, 3...
...Joint part, 8...Auxiliary block body, 9,9'...
...Panel for concrete.

Claims (1)

[Scope of Claims] 1. A concrete formwork made of synthetic resin foam having a recessed part expressing the appearance of a masonry pattern and a higher and flat joint part formed on the surface of the concrete pouring side is used as a concrete panel. a first step in which a plurality of concrete formworks are successively installed in at least one of the horizontal and vertical directions, and a second step in which concrete is poured between the concrete panels. In the concrete construction method using masonry formwork, which includes the following steps: and after the concrete has hardened, the concrete panels and concrete formwork are dismantled to form a masonry pattern on the concrete surface. A unit block formed in a rectangular shape and having three concave portions divided into irregular shapes by the joint portions that intersect in a substantially T-shape in the middle is used as the formwork for the first molding. A concrete construction method using masonry formwork, which is characterized by carrying out the process. 2. The first step includes the step of using a substantially rectangular auxiliary block body as a secondary concrete formwork for the main concrete formwork, and combining this auxiliary block body with the unit block body. Claim 1 above
Concrete construction method using masonry formwork as described in section.