JPH10231511A - Method of fitting rc slab to steel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve constructing performance by inserting an RC slab with a water expansive sealant stuck thereto, into H-steel erected in an inclined state, then providing a form at the front face, and filling grout therein. SOLUTION: An RC slab 5 is inserted in an insert part 6 of an H-shape steel 1 erected in an inclined state. The RC slab 5 is provided with a water expansive sealant previously stuck to a contact place with a flange part of the H-shape steel 1. A form is disposed over the adjacent RC slabs 5 while covering the front faces thereof with the H-shape steel 1 held in between, fastening bolts inserted through bolt holes of the form are thread-fastened to internal threads, previously provided at the flange of the H-shape steel 1, to fix the form. Grout material is then filled in the form, and after solidification, the form is removed. In this case, an elastically deformable form is used as the form so that the form can be easily detached by the elastic spring action of the form when the fastening bolts are detached. The RC slab can therefore be fitted to a steel structure positively and easily without looseness, and anticorrosion work taking plenty of time can be dispensed with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a reinforced concrete slab to a steel structure, and more particularly to a method of attaching an RC plate (precast reinforced concrete slab) to a steel structure to construct a wall such as a seawall or a breakwater. .

[0002]

2. Description of the Related Art Conventionally, in order to construct a wall such as a seawall or a breakwater, as shown in FIG. 5, an H-section steel 1 is vertically erected with grooves so as to support an RC plate 5 as shown in FIG. It was common to construct the structure and insert the RC plate 5 between the grooves. At that time, cement mortar is filled in the gap between the RC plate and the steel structure to fix the steel structure (H-section steel) and the RC plate, or the H-shaped steel groove portion and the RC plate are bolted. Was taking measures.

[0003]

However, according to the above-mentioned method, a special form is required for filling the mortar, and a considerable man-hour is required for bolting. Complicated work was required. Furthermore, when using the above method, the steel material holding the RC plate is exposed to the external environment, and especially when a wall is constructed on a breakwater in the marine civil engineering field, strict anticorrosion measures must be taken against the steel material. Needed. The present invention is intended to solve such a problem of the prior art. First, when the RC plate is attached to a steel structure, it is extremely easy to perform without particularly complicated work. It is another object of the present invention to provide a method capable of fixing the RC plate securely.
Secondly, concrete has already been protected from corrosion at the stage of building walls such as breakwaters in the marine civil engineering field,
It is an object of the present invention to provide a method for constructing a wall that does not require special anticorrosion measures.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method of attaching an RC plate to a steel structure by using an RC plate.
A first step of forming a steel structure having a plurality of H-section steels, which are erected so as to form the insertion portion of the plate continuously in the width direction and are provided with female threads in the flange portion. A steel structure is prepared by inserting a RC plate in which a water-expandable sealing material is attached in advance to a portion that comes into contact with the steel structure, into the insertion portion of the RC structure of the steel structure erected in the first step. A second step of forming a composite of the RC plate, and a formwork is installed on the front surface of the steel structure-RC plate composite formed in the second step, and the formwork is fastened to the flange portion by a fastening bolt. And a third step of forming a grout filling space formed by the formwork, the RC plate and the steel material, and filling and solidifying grout in the grout filling space formed in the third step. Fourth step and fifth step of removing the form after solidifying the grout.
And a process.

Further, according to the present invention, the installation of the mold in the third step is performed by using an elastically deformable mold.
After covering the front surfaces of the RC plates adjacent to each other across the H-section steel of the plate composite including the H-section steel, a bolt is inserted through a bolt hole provided in the formwork, and a flange portion of the H-section steel is formed. The H-shaped steel and the RC plate are integrally fixed by screwing to the female screw portion provided in the above, and further tightening the bolt so as to press the RC plate.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on one embodiment with reference to the drawings. As shown in FIG. 1, an H-section steel 1 is erected with a fixed inclination with respect to the vertical by using a stay 4 composed of a column 2 and a reinforcing member 3 as a support. The H-shaped steel 1 is provided with a female screw 7 to be screwed into a fastening bolt 10 described later in advance on a flange portion thereof. H-section steel 1
Are spaced by a distance corresponding to the span of the RC plate 5. H
The grooves formed by the flanges and the web of the section steel 1 face each other and form the inserts 6 of the RC plate 5. The inclination of the H-shaped steel 1 is set so that the insertion of the RC plate 5 in the next step does not become difficult, and after the insertion of the RC plate 5, the RC plate 5 leans against the flange portion of the H-shaped steel 1 and stably. What is necessary is just to be held by the flange portion. Generally 5 ° ~
It may be 30 °. Note that the stay 4 is generally required to be erected at a predetermined position on the H-section steel 1 with a predetermined inclination,
The structure is not particularly limited. The construction of the steel structure is carried out in this manner. The construction may be carried out on land, and after setting the stay 4 in the sea, use this as a guide for H
A method of casting the shape steel 1 may be adopted.

Next, the steel structure formed as described above is
A second step of inserting the C version 5 is performed. That is, FIG.
As shown in FIG. 2B, the RC plate 5 is slid and inserted into the insertion portion 6 by using the flange portion (groove portion) of the H-shaped steel 1 which is erected and inclined. At that time, RC
As shown in FIG. 2 (a), a part of the portion of the plate 5 which comes into contact with the flange portion of the H-section steel 1 is cut in an appropriate groove shape, and a water-swellable sealing material 8 is attached to the plate 5. . This allows for later grouting or installation in the sea,
The water-swellable sealing material 8 expands and reliably fills the gap between the RC plate 5 and the H-section steel 1 to completely fix the RC plate and prevent corrosion of the H-section steel. The type and size of the water-swellable sealing material may be any as long as the above-mentioned purpose is achieved.

[0008] The steel structure-RC plate composite formed as described above is integrally fixed, and a formwork 9 is provided on the front surface thereof so as to have an anticorrosion action, and formed by the formwork 9 and the composite B. The space 11 to be filled is filled with grout. For installation of the formwork 9, a bolt hole 13 is provided in the formwork, and a fastening bolt 10 is screwed into the female screw 7 provided on the flange portion of the H-section steel 1 from the bolt hole 13 and fixed to the formwork 9. Done by In this case, there is no particular limitation on the shape of the mold 9 and the method of installing the mold 9 on the front surface of the composite, but it is preferable to carry out as follows.

First, a mold frame 9 that can be elastically deformed is used. This is for ensuring that the RC plate 5 is pressed against the inner surface of the H-shaped steel flange and that the mold 9 is easily removed from the grout after the grout is solidified, as described later.
The shape of the formwork 9 may be such that it covers the RC plates 5 adjacent to each other across the H-section steel 1 and covers the front surfaces thereof. As described above, the bolt holes 13 are formed in the RC plate 5 so that the fastening bolts 10 are inserted therethrough. Further, it is preferable that an elastic member such as a seal rubber 14 is disposed at a contact portion of the mold 5 with the RC plate 5.

A female screw 7 provided on a flange of the H-section steel 1 by inserting a fastening bolt 19 through a bolt hole 13 of the form 5
Then, the form 9 and the composite of the steel structure and the RC plate are connected. In the present invention, the bolting is further continued,
The tip of the bolt 10 reaches the RC plate 5. Thereby, the RC plate 5 is pressed by the bolt 10 and strongly pressed against the inner surface of the flange surface of the H-shaped steel as shown in FIG. However, the pressure is kept within an appropriate range by the action of the spring of the mold 9, and the RC plate 5 is not broken.

In the third step, the steel structure-RC plate composite and the mold 9 are integrally fixed, and at the same time, the mold 9 and the R
Grout filling space 1 surrounded by C plate 5 and H-section steel
1 is formed. The grout filling space 11 is filled with an appropriate grout material and solidified, whereby the H-section steel 1, RC
The entire composite composed of the plate 5 is firmly integrated, and the front surface of the H-section steel is covered with a grout material, so that the H-shaped steel is shielded from the external environment such as seawater and has an anticorrosion function.

When the grout material is sufficiently solidified, the form 9 is removed and the wall is completed as shown in FIG. In the case of the present invention, if the fastening bolt 10 is removed, it can be easily removed by the action of the elastic spring of the formwork 9. The bolt holes formed after removing the fastening bolt 10 may be filled with mortar or the like as necessary.

The method of attaching the RC plate to the steel structure according to the present invention has been described above. In carrying out the present invention, the entire process is performed on land, and the completed assembly is installed at a predetermined location in the sea. I'll do it. However, after any of the first to third steps, the intermediate assembly may be installed at a predetermined location in the sea, and the subsequent fourth and fifth steps may be performed in the sea.

[0014]

According to the present invention, the steel structure and the RC plate can be easily and reliably fixed, and so-called rattling of the RC plate is completely eliminated. Further, the H-shaped steel part supporting the RC plate in the steel structure is completely covered with the grout material, so that it is not necessary to perform a troublesome anticorrosion work again. In particular, the elimination of rattling of the RC plate means that the relatively fragile RC plate can be safely and securely inserted into the steel structure, and since the grout does not oscillate during solidification, a strong and defect-free grouting layer is formed. Obtainable.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a steel structure used in the present invention.

FIG. 2 is a partial sectional view showing a relationship between an H-section steel and an RC plate used in the present invention. (A) is a transverse sectional view, (b) is a longitudinal sectional view.

FIG. 3 is a cross-sectional view showing an installation state of a formwork on a steel structure-RC plate according to the present invention.

FIG. 4 is a partial cross-sectional view of a wall constructed according to the present invention.

FIG. 5 is a perspective view showing a state of attachment of an RC plate to an H-section steel by a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 H-section steel 2 Prop 3 Reinforcement 4 Retainer 5 RC plate 6 RC plate insertion part 7 Female screw 8 Water-expandable sealing material 9 Formwork 10 Bolt 11 Grout filling space 12 Grout 13 Bolt hole 14 Seal rubber

Claims (2)

[Claims] 1. A steel structure having a plurality of H-section steels, which are erected and inclined so that an insertion portion of an RC plate is continuously formed in a width direction, and in which a female screw is engraved on a flange portion. A first step of forming, and inserting an RC plate having a water-expandable sealing material attached to a portion in contact with the steel structure in advance into an insertion portion of the RC plate of the steel structure formed in the first step. A second step of forming a composite of the steel structure and the RC plate by means of: a mold is installed on the front surface of the composite of the steel structure and the RC plate formed in the second step, and the flange is attached to the flange. A third step of forming a grout filling space surrounded by the formwork, the RC plate, and the H-section steel by connecting the grout to the portion via a fastening bolt; and grouting the grout into the grout filling space formed in the third step. A fourth step of filling and solidifying; and after solidifying the grout, removing the formwork 5 steps and, RC version of installation in a steel structure composed of. 2. An elastically deformable formwork is sandwiched by a structure-RC plate composite H-beam, and the adjacent RC plates are covered with the H-beams in front of each other. A bolt is inserted from the provided bolt hole and screwed into a female screw provided on the flange portion of the H-shaped steel, and further tightened by bolts so as to press the RC plate to integrally form the formwork with the H-shaped steel and the RC plate. The method for attaching a RC plate to a steel structure according to claim 1, further comprising a third step of fixing.