JPH0874276A - Construction method for surface of concrete building frame and concrete permanent form used in this method - Google Patents

Abstract

PURPOSE: To obviate the special bar arrangement and shorten the construction term by facilitating the fine regulation of the slope of a permanent form and the adjustment of height in the case of the construction of a dam and a retaining wall. CONSTITUTION: The surface side of a permanent form 1 is formed in an irregular decorated face, and its back face is composed of an insert 4 for threadedly attaching the base of an anchor bolt 3 and a locking support 6 for locking an anchor reinforcement 5. The construction is carried out in such a way as, in the case of placing a base concrete, the base parts of a steel member 2 and of an assembling reinforcement 11a are simultaneously buriedly provided and solidified, and a permanent form 1a on the lowest stage is arranged on the solidified base part as it is adjusted in height by an adjusting bolt 9, and the anchor reinforcement 5 is locked on the locking support 6 in a state where the permanent form panel 1a is connected to the steel member 2 through the anchor bolt 3, and the base part of the anchor reinforcement 5 is weldedly fixed to the assembling reinforcement 11a. Next a permanent form panel 1b on the second stage is similarly fixed by the anchor bolt 3 and the anchor reinforcement 5, and the concrete is placed on the concrete placing side of the back of the sacrifice form and integrated. Next, the permanent form 1c on the third stage is fixed in a similar process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a surface of a concrete frame used for constructing a dam, a dam, a concrete retaining wall, etc., and a concrete discard formwork used for the method.

[0002]

2. Description of the Related Art Wooden and steel form frames (temporary frames) are used when constructing erosion control dams and concrete retaining walls. In that case,
Form preparation, assembly, removal, storage and maintenance are required. In addition, the formwork was made of concrete, and there were some that did not require steel or steel formwork, but in that case, the mounting structure was fixed with a separator.

A concrete formwork which can serve as a formwork without using the wooden or steel formwork as described above, and can be directly incorporated into a structure to form a surface or serve as a strength member. Is proposed in Japanese Patent Application No. 4-212152. This is a concrete panel whose front surface is the finished surface of the structure and whose back surface is the concrete pouring side, and the back surface side is provided with embedded bolt holes for mounting the metal fittings for mutual connection of the formwork. The connecting fittings are buried,
Or, the difficulty that the conventional concrete formwork, such as the one provided with a connecting retaining wall, does not have,
This is a solution to problems such as being unsuitable for a large size, having to remake the surface, and making it difficult for workers to move within the mold.

[0004]

Not only in this example, but also in the conventional concrete discard formwork, shortening the construction period, adjusting the gradient, integrating with the concrete cast on the back side, height from the bottom It has not been able to fully meet the demand for adjustment and the like. That is, the conventional concrete discard formwork is fixed to a slope connecting metal fitting formed in advance along the slope of a retaining wall or the like, or is fixed to a preformed forming body such as a dam with a bolt or the like. Therefore, the slope cannot be adjusted freely, there is no function to adjust the individual discarding molds up and down, and a lot of labor and time are required for the construction. The present invention is intended to solve these problems.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a steel material is erected substantially parallel to the finished surface of a structure, and the lowermost waste formwork is provided on the base concrete below the finished surface of the structure. Adjust the height with the adjusting bolt and place it, and while the panel is connected to the steel material with the anchor bolt, lock the tip of the anchor bar to the back catch and fix the base of the anchor bar to the body side. Then, the discard formwork from the second stage onward is similarly fixed by anchor bolts and anchor bars, and concrete is cast into the concrete placing side of the rear face of the discard formwork to integrate the concrete frame. This is the surface construction method.

[0006] The concrete discard formwork used in this construction method is a concrete formwork panel whose front surface is the finished surface of the structure and whose back surface is the concrete pouring side, and the steel material which supports the formwork panel. An anchor bolt for connecting the above is provided, or a lock receiving member is provided on the back surface of the concrete formwork panel for locking the tip hook portion of the anchor bar fixed to the body side of the structure.

Further, this concrete discarding formwork is provided with a gradient having a small cross-sectional area toward the back surface of the back of the panel. The material of the concrete formwork mentioned here includes general Portland cement concrete, resin concrete, glass fiber reinforced concrete (FRC), and the like.

Further, an adjusting bolt is provided at the lower edge of the lowermost formwork panel so that the height can be adjusted between it and the base concrete.

[0009]

According to the present invention, while the form panel is connected to the steel material by the anchor bolt, by fixing the base of the anchor streak, which is locked to the lock receiving member on the back side, to the body side, the panel slope is finely adjusted. In addition, it is possible to prevent the formwork panel from changing the installation slope and collapsing the stacking state by integrating with the concrete cast on the backside of the formwork panel.

By providing anchor bolts that connect the steel material supporting the formwork panels to the steel material that is substantially parallel to the finished surface of the structure, the stacking of individual formwork panels can be fixed. A concrete pouring gap is secured between the formwork panel and the steel material, a concrete layer is formed near the surface by the concrete poured in between, and the formwork panel becomes a discarding formwork and has a strong surface. Form a state. Also, before, the work could not be completed without placing concrete to a predetermined height, but with this construction method,
You can stop the pouring work at any part without worrying about the concrete joint.

Since this concrete discard formwork has a slope on the back of the formwork panel that has a small cross-sectional area toward the back surface, a wedge-shaped concrete filling gap is provided between the panels. Is formed, concrete is entered around the four sides of the formwork panel, and integration is further promoted.

By providing the adjusting bolt, the height between the lower edge of the formwork panel and the base concrete can be freely changed.

[0013]

EXAMPLE FIG. 1 is a side view showing a state in which the surface of a concrete retaining wall is formed by the concrete discard form of the present invention. As is clear from this example, the concrete discard form 1 is inclined from the lower side to the upper side in a predetermined inclination (gradient) state to the steel material 2 provided substantially parallel to the finished surface of the structure by the anchor bolt 3 and the steel material 2 Are fixed with a predetermined gap between them. Channel steel is used as the steel material in this example. Anchor bolt 3 for steel 2
Group holes 12 are provided as shown in FIG. 3 in order to be able to adjust the fastening position by.

As shown in FIG. 2, each concrete structure of the concrete discarding form 1 has a rectangular (rhombic shape or upper or lower or right and left edges may be corrugated) decorative surface (finishing surface) having an uneven surface on the surface side. In addition, the back surface is embedded with an insert 4 having a female screw structure capable of screwing a base portion of an anchor bolt 3 that connects the steel material 2 with the steel material 2. Further, on the back surface, an annular lock receiver 6 is provided so that the tip hook portion of the anchor muscle 5 fixed to the body side of the structure can be locked. The lock receiver 6 is not limited to such an annular shape, but may be a hook shape, or a hole capable of locking the tip hook portion of the anchor bar 5 may be provided in a part of the concrete discarding formwork 1. .

The back of the formwork panel is provided with a sloped portion (tapered portion) 7 having a small cross-sectional area toward the back surface. Even if this gradient has some unevenness on the way to the back surface, it is sufficient that it has a small cross-sectional area toward the back surface as a result.

The lowermost formwork panel 1a has a female screw structure as shown in the lower part of FIG. 1 in order to provide an adjusting bolt 9 for adjusting the height between the lower edge and the base concrete 8. The insert 10 is buried.

Construction is generally performed as follows. When the base concrete below the finishing surface of the structure of the dam or retaining wall is placed, the steel material 2 and the base of the rebar 11a for assembly are buried at the same time,
After solidifying, the height of the lowermost discard form panel 1a is adjusted by the adjusting bolt 9 provided at the lower edge portion, and the anchor form 3 is used to connect the discard form panel 1a to the steel material 2. In this state, the front end hook of the anchor bar 5 is locked to the rear lock receiver 6 and the base of the anchor bar is welded and fixed to the rebar 11a for assembly partially buried in the body side, and then the second step Abandon the formwork panel 1b to the anchor bolts 3 and anchor bars 5.
Then, fix it in the same way, and cast concrete to the concrete casting side on the back of the discarding formwork to integrate it. At this time,
If necessary, the steel material 2 for extension and the reinforcing bar 11b for assembly are fixed together. Then, in the same process, the third-stage discarded formwork panel
1c is set on the steel material 2 with the anchor bolt 3, and is fixed to the rebar 11b for assembly by the anchor bar 5. This process is repeated until it reaches the designed upper stage.

In the present invention, the insert metal fitting 13 is provided above the front surface of the discard form panel as shown by the two-dot chain line in FIG. 1 or 2.
By embedding the panel, it is possible to easily remove the hanging member of the panel without preparing a scaffold. Further, if the insert fittings 13 are embedded in the front two places and the bolts 14 are embedded therein, the scaffolding plate 15 can be hung and the scaffolding can be easily secured.

[0019]

Industrial Applicability According to the present invention, it is possible to finely adjust the slope and height of a waste formwork when constructing a dam, a dam, or a retaining wall, which facilitates construction. Concrete was filled around each of the discarding forms to enable solid integration. Since the steel material for supporting the formwork and a large number of anchor reinforcements remain as reinforcement reinforcements on the rear surface of the formwork, no special reinforcement work is required. It has also become possible to shorten the construction period.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a concrete retaining wall surface is formed by a concrete discarding formwork of the present invention.

FIG. 2 is a plan view of the same main part.

FIG. 3 is a rear view of the same.

[Explanation of symbols]

 1 Concrete discard form 2 Steel 3 Anchor bolt 4 Insert 5 Anchor bar 6 Locking bar 7 Gradient part (tapered part) 8 Base concrete 9 Adjustment bolt 10 Insert 11 Reinforcing bar for assembly 12 Group hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Kono 630 Kaida, Ochiai-cho, Maniwa-gun, Okayama 1 Landes Co., Ltd.

Claims (5)

[Claims] 1. A steel material is erected upright substantially parallel to the finished surface of the structure, and the height of the lowermost waste formwork is adjusted by adjusting bolts at the lower edge on the base concrete below the finished surface of the structure. Place it and connect the form panel to the steel material with the anchor bolts, lock the tip of the anchor bar to the back catch of the anchor bar and fix the base of the anchor bar to the side of the body, then the second step A method for constructing a surface of a concrete skeleton, characterized in that the subsequent discarding form is similarly fixed with anchor bolts and anchor bars, and concrete is placed on the concrete placing side of the backside of the discarding form to be integrated. 2. Concrete comprising a concrete form panel whose front surface is the finished surface of the structure and whose back surface is the concrete pouring side, and anchor bolts which connect the steel material supporting the form panel to the back surface. Abandoned formwork. 3. A hook for anchoring a tip end portion of an anchor bar fixed to the skeleton side of a structure to the back surface of a concrete formwork panel whose front surface is the finished surface of the structure and whose back surface is the concrete pouring side. A concrete discard formwork with a bar. 4. A concrete formwork panel whose front surface is a finished surface of a structure and whose back surface is a concrete pouring side,
A concrete discard formwork provided with a gradient having a small cross-sectional area toward the back surface of the formwork panel. 5. A concrete formwork panel whose front surface is a finished surface of a structure and whose back surface is a concrete pouring side,
A concrete discard formwork in which an adjusting bolt is provided on the lower edge of the bottom formwork panel so that the height can be adjusted between it and the base concrete.