JPH06308286A - Support structure for concrete structure - Google Patents

Abstract

PURPOSE:To fit a support member at an optional position of a structure by directly welding the support member on an iron plate formwork concurrently serving as a concrete placing formwork and the cover material of the concrete structure. CONSTITUTION:A concrete structure 1 has a concrete skeleton 2, and the surface of the skeleton 2 is covered by an iron plate formwork 3. A support member 5 supporting a pipe 4 is constituted of an angle member 5a, a base plate 5b, and a U-bolt 5c fixing the pipe 4, and the base plate 5b is welded on the formwork 3. The formwork 3 is assembled as a concrete placing formwork, and concrete is poured into it. The formwork 3 covers the surface of the structure 1 as the surface cover material of the structure 1 after the placing of concrete, and the support member 5 can be welded at an optional position. The placing of concrete and the fitting work of the support member 5 are simplified, the support member 5 can be welded without waiting the curing of concrete, and the plant construction work period can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for concrete structures such as plant pipes and conduits, and in particular, it can be attached to any position on the wall surface of a concrete building such as a nuclear power plant and the construction is simple. Support structure for concrete structures.

[0002]

2. Description of the Related Art Generally, in structures such as plant buildings,
Pipes, conduits, etc. are laid along the wall surface of the structure, and are supported by a support member standing on the wall surface of the structure.

Most of the above-mentioned plant structures have a reinforced concrete structure or a structure in which concrete is placed around a steel frame structural member in order to make the structure resistant to fire and high temperature. For this reason, conventional supports such as pipes have an embedded metal object that is embedded and fixed in concrete in order to obtain a required supporting strength.

FIG. 6 shows the structure of a conventional embedded anchor support. Reference numeral 21 indicates a part of the concrete structure, and the embedded metal article 22 is embedded inside the concrete structure 21. Support member 23
Is welded to the upper surface of the embedded metal member 22. The pipe 24 is fixed to the support member 23 by a U bolt 25.

In this conventional embedded anchor support, an embedded metal object is fixed to a reinforcing bar or a formwork for concrete pouring before pouring concrete, and then concrete is poured. After hardening the concrete, the form is removed, and the support member 23 is welded to the embedded metal piece 22.

In the above-mentioned embedded anchor support, an embedded metal object is installed before placing concrete, but there is a post-casting anchor support which is attached after placing concrete to simplify the concrete placing work.

FIG. 7 shows the structure of a conventional post-strike anchor support. In this conventional post-casting anchor support 31, a hole is dug in a concrete skeleton 32 with a drill or the like after a curing period after placing concrete, and an anchor bolt 33 is inserted into the hole.
The base plate 34 is fixed to. Next, the support member 35 is welded to the base plate 34, and the support member 3
5 supports the pipe 36.

Conventionally, in order to omit the step of removing the formwork after curing the concrete placement, the formwork for concrete placement is constructed by an iron plate, and after the concrete placement, it is left as it is and the surface coating material for the structure. An iron plate formwork is known. An embedded anchor support or a post-cast anchor support may also be installed for a concrete structure having this iron plate formwork.

FIG. 8 shows a structure of an embedded anchor support in a concrete structure having the iron plate form. In this embedded anchor support 41, a hole is drilled in the iron plate form 42 by gas or the like before placing concrete, and an embedded metal object 43 is arranged in the opening portion of this hole, and a gap between the hole and the embedded metal object 43 is formed. Block with the blocking plate 44. After welding the cover plate 44, the concrete is poured into the iron plate form 42, and the embedded metal 43
To fix. The support member 45 is welded to the embedded metal 43, and the support member 45 supports the pipe 46.

FIG. 9 shows a post-cast anchor support attached to a concrete structure having an iron plate formwork. In this post-casting type anchor support 51, holes are dug in the iron plate form 52 and the concrete frame 53 with a drill or the like after placing concrete in the iron plate form 52 and passing through a curing period. Insert and fix the anchor bolt 54 in this hole,
The base plate 55 is fixed to the anchor bolt 54.
Next, the support member 56 is welded to the base plate 55,
The support member 56 supports the pipe 57.

[0011]

However, in the above-mentioned conventional embedded anchor support, concrete must be placed while being held in a predetermined position. Therefore, when there is no iron plate formwork, an embedded metal article is attached to the rebar by a wire. Must be fixed, and if there is an iron plate formwork, the iron plate formwork must be melted and the embedded metal must be welded to the opening. Due to the large number of supports, these works required a lot of labor and time for the construction work of the plant.

Further, since the installation position of the embedded anchor support is decided at the time of placing concrete, if the route of piping or the like is changed due to the design change, the piping or the like should be installed at the place where the support is required. There was a problem I could not support.

On the other hand, the post-strike anchor support is
Generally, the pull-out strength is lower than that of the above-mentioned embedded anchor support, and usable supports are limited. Also, in order to insert and fix the anchor bolts, it is necessary to dig a hole in the concrete with a drill, and if there is an iron plate formwork, the iron plate formwork must be cut before excavation. It was These operations are difficult and the consumption of tools such as drills is great.

Since the embedded anchor support and the post-casting anchor support have to be mounted before the concrete is poured and after the curing time of the concrete has passed, it is necessary to duplicate the construction work to shorten the construction period of the plant. Had been the limit of.

Therefore, an object of the present invention is to provide a support structure for a concrete structure which is attached to an arbitrary position of a concrete structure of a plant, is easy to construct, and has sufficient strength.

[0016]

In order to achieve the above object, a support structure for a concrete structure according to the present invention comprises:
An iron plate formwork also serving as a concrete casting formwork for a concrete structure and a covering material for the structure, wherein a support member is directly welded onto the iron plate formwork reinforced by a reinforcing material. It is what

[0017]

In the support structure for a concrete structure according to the present invention, the support member is welded to the surface of the iron plate formwork that also serves as the formwork for concrete placement. There is no need to do so, and the work of placing concrete is extremely easy.

Further, since the support member is welded to the iron plate formwork on the surface of the iron plate formwork, the work is extremely easy, and moreover, unlike the conventional embedded anchor support and post-casting anchor support. Since the support member can be welded to the iron plate form without considering the curing time after placing concrete, the construction period of the plant can be shortened.

Further, since the iron plate formwork covers the entire surface of the concrete structure, even if the route of the pipe or the like is changed due to the design change, the pipe can be supported at an appropriate position, It is extremely advantageous in plant construction with many design changes.

Since the iron plate form of the present invention is reinforced by the reinforcing material in consideration of the support supporting load, by welding the support at an appropriate position, a highly reliable support can be obtained.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of an example of a support structure according to the present invention. In FIG. 1, reference numeral 1 indicates a part of a concrete structure such as a building of a nuclear power plant. This concrete structure 1 has a concrete skeleton 2, and the surface of this concrete skeleton 2 is covered with an iron plate form 3.

The support member 5 for supporting the pipe 4 comprises an angle member 5a, a base plate 5b and a U bolt 5c for fixing the pipe 4, and the base plate 5b is welded onto the iron plate form 3.

FIG. 2 shows another support structure viewed from the front. In this support structure, the support member 6 is made of a channel material having a U-shaped cross section, and the back side has the reinforcing ribs 7,
It is welded to the surface portion of the iron plate formwork 9 reinforced by 8. The pipe 10 is fixed to the support member 6 via shoes (not shown) or the like. This support structure can support a larger load than the support structure of FIG. 1 because the iron plate frame 9 is reinforced by the reinforcing ribs 7 and 8.

In the support structure shown in FIGS. 1 and 2, the iron plate molds 3 and 9 are assembled at the time of concrete pouring and concrete is poured into the interior as a form for concrete pouring. After the concrete is cast, the iron plate molds 3 and 9 serve as a surface covering material for the concrete structure and cover the surface of the concrete structure, so that the support members 5 and 6 can be welded to arbitrary places thereof. This simplifies the work of placing the concrete and attaching the support, and the support can be welded without waiting for the concrete to be cured, thereby shortening the plant construction work. Further, it is possible to flexibly deal with design changes. The reinforcing ribs 7 and 8 can increase the holding force of the formwork to the ready-mixed concrete, the adhesive force of the iron plate formwork to the concrete, and the support load of the support.

In the support structure of the present invention, the supporting load differs depending on the welding position of the support member and the position of the reinforcing member such as the reinforcing rib. FIG. 3 shows various arrangement examples of the reinforcing member and the support member and the relationship between their supporting loads. In FIG. 3, reference numeral 11 indicates an iron plate form, the back surface of which is reinforced by the reinforcing ribs 12, and the support member 13 is welded to the front side. A load P that is perpendicular (tensile test) or parallel (bending test) to the wall surface is applied to the tip of the support member 13. Each support No. 1 to No. 7 shows the measurement results of the maximum load and the load (proportional limit load) with respect to the elastic deformation range. In this test, 50 (mm) x 50 (mm) x 6 (m
The angle material of m) is used for the reinforcing rib. Also,
The reinforcing ribs are arranged vertically and horizontally at intervals of 500 mm.

It can be seen from FIG. 3 that the support structure of the present invention can support loads up to 510 kgf under tensile load and 6000 kgf under downward bending load within the elastic deformation range. Here, the supporting load of piping etc. is usually 10k.
Since it is gf to 100 kgf, it can be seen that the support structure of the present invention has sufficient strength.

FIG. 4 shows the support No. shown in FIG. 1 to No. The relationship between the load and the deformation curve during the tensile test of No. 3 is shown in the graph of horizontal axis displacement and vertical axis load. In FIG.
The curve L1 is the support No. 1 corresponds to point P on the curve L1
y is a support No. The yield point of No. 1 is shown, and it is located near the tensile load of 510 kgf. Curves L2 and L3 are the support numbers. 2 and No. It corresponds to 3 and 1
It is shown that no yielding occurs even with a tensile load of 000 Kgf or more. Also, assuming that the displacement of the support is generally allowable 5 mm, the support No. It can be seen that Nos. 2 and 3 cause a displacement that is sufficiently allowable with respect to a load of 1000 Kgf.

FIG. 5 shows various mounting shapes of the support member,
It shows the construction management procedure for the two-dimensional layout.
Case 1 shows a support shape when supporting a pipe or the like with an angle member. The support of this case 1 is made of angle material and is mainly used as a support for light load,
It can be attached to the part that is not reinforced by the reinforcing ribs. However, one wall portion surrounded by the reinforcing ribs should include only one support.

The supports of cases 2 and 3 are made of channel material, and are used as supports for supporting a relatively large load. In this case, at least one end of the channel material is welded to the front side of the iron plate form reinforced by the reinforcing rib. However,
Weld the support between the reinforcing ribs within one place.

The supports of the cases 4 and 5 show support shapes for supporting pipes separated from the wall surface, and the relationship with the reinforcing ribs is the same as in the cases 2 and 3.

[0031]

As is apparent from the above description, in the support structure of the present invention, the support member is directly welded to the surface of the iron plate formwork that also serves as the concrete pouring formwork. It is not necessary to fix the hardware, and the support member can be welded to the support position changed by the design change. As a result, the work of placing the concrete and the work of mounting the support are facilitated, and the support member can be welded without waiting for the curing time after the placing of the concrete, so that the construction period of the plant can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a support structure according to an embodiment of the present invention.

FIG. 2 is a front view of a support structure according to another embodiment of the present invention.

FIG. 3 is a diagram showing support members of various structures according to the present invention and supporting loads thereof.

FIG. 4 is a diagram showing a relationship between a supporting load and a displacement of the support structure according to the present invention.

FIG. 5 is a view showing the mounting shapes of various supports according to the present invention and the procedure of their construction.

FIG. 6 is a cross-sectional view showing the structure of a conventional embedded anchor support of a concrete structure having no iron plate formwork.

FIG. 7 is a cross-sectional view showing the structure of a conventional post-casting anchor support of a concrete structure having no iron plate formwork.

FIG. 8 is a cross-sectional view showing the structure of a conventional embedded anchor support for a concrete structure having an iron plate formwork.

FIG. 9 is a cross-sectional view showing the structure of a conventional post-casting anchor support for a concrete structure having an iron plate formwork.

[Explanation of symbols]

 1 Concrete Structure 2 Concrete Frame 3 Iron Plate Formwork 4 Piping 5 Support Member 7 Reinforcing Rib 8 Reinforcing Rib 9 Iron Plate Formwork 10 Piping

Claims (1)

[Claims] 1. An iron plate formwork that doubles as a concrete placing formwork for a concrete structure and a covering material for the structure,
A support structure for a concrete structure, wherein a support member is directly welded onto the iron plate form frame reinforced by a reinforcing material.