JP3610457B2 - Construction method of structure using panel unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention constructs a structure formed by combining a reinforced concrete mesh frame and a panel unit in a composite structure, specifically a dome-like roof or other large span roof, or a wall of a building having a large area. Belongs to the technical field of methods.
[0002]
[Prior art]
Conventionally, as a method of constructing a dome-shaped roof or other large-diameter roof, or a wall of a building having a large area, first, a frame that is a main structure is constructed in a mesh shape with steel frames, steel pipes, reinforced concrete, etc. In general, a panel to be a roof material or a wall material (so-called exterior material) is attached to the frame.
[0003]
However, the conventional general panel does not have sufficient rigidity, and the base material such as steel is attached to the frame or attached as the backing of the panel, etc., to ensure the rigidity outside and inside the panel. Is the current situation. The mounting of the base material requires preparatory work such as embedding a mounting hardware in the frame with high accuracy in advance, and accuracy management and embedding work are troublesome. Further, the weight is increased by the amount of the base material, the frame cross section is increased, and the cost is increased. In addition, the installation of the panel is troublesome and takes a lot of time and there is a problem that the construction period is prolonged.
[0004]
Further, when constructing a reinforced concrete frame, it is necessary to assemble and install a large amount of formwork and to dismantle and remove the work, which also takes time and increases the construction period.
[0005]
Furthermore, since the construction of the frame and the attachment of the panel are performed in separate steps, it has not been a reasonable construction method.
[0006]
The following inventions are well known as conventional techniques in this type of technical field. For example,
(I) “Constructing method of concrete dome roof” disclosed in Japanese Patent Application Laid-Open No. 2000-282703 first connects a pair of concrete panels that form a fan shape from the upper ends of opposite side walls to the center of the roof. Are connected to form an arch, and a PC steel rod is inserted into the arch to introduce prestress. In order to widen the arch, it is described that a roof is constructed by sequentially connecting concrete panels from the upper ends of the side walls facing each other toward the center of the roof in the same manner as described above. Since this construction method uses a highly rigid concrete panel, the base material can be omitted. It can also be noted that the construction of a roof frame is unnecessary.
[0007]
(II) “Assembly construction method of prestressed concrete single-layer lattice dome” disclosed in Japanese Patent Application Laid-Open No. 2000-144909 uses a precast concrete member having a sheath embedded at the end as a beam member, and this precast concrete member is joined It is described that a dome (roof) frame is constructed by inserting a PC steel rod or the like into the sheath, introducing post tension, pressing and joining, and assembling with a part (member) as an intermediary. Since this prefabricated concrete method uses a precast concrete member as a beam member, it is not necessary to cast concrete when constructing the frame, and the work of assembling and installing the formwork and dismantling and removal can be omitted.
[0008]
[Problems to be solved by the present invention]
In order to introduce prestress, the conventional technique (I) above requires processes such as high-precision PC member production, prestress introduction work, management of introduced prestress, and hardware creation. And the cost increases.
[0009]
The conventional technique (II) above only constructs a roof frame and uses existing panels in the mesh space, so a base material is required, and the preparation work for attaching the base material is troublesome. . Further, the weight increases by the amount of the base material, and accordingly, the frame cross section becomes larger and the cost increases. In addition, the installation of the panel is troublesome and takes a lot of time and there is a problem that the construction period is prolonged.
[0010]
In addition, the construction of the roof frame and the installation of the panels are performed separately in different processes, and the rational construction method has not been improved.
[0011]
Accordingly, an object of the present invention is to construct a structure (roof) comprising a combination of a lightweight and highly rigid panel unit and a reinforced concrete mesh frame in a composite structure, that is, construction of a roof frame and attachment of panels. Is constructed in the same process, and the roof frame is constructed by using the peripheral frame of the panel unit as a part of the mold for building the roof frame, and the roof frame and the peripheral frame It is to provide a method of constructing a structure that is rational in construction and has a high rigidity, in which the mounting (incorporation) of the panel unit is completed by integrating the rigidly.
[0012]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems of the prior art, a construction method of a structure using a panel unit according to the invention described in claim 1 is:
A construction method of a structure combining a mesh frame and a panel unit,
The panel unit has an in-plane stiffening member disposed in a frame surface of a peripheral frame frame having a stud attached to the outer surface, and an end portion of the panel unit is connected to a blade member located outside the peripheral frame frame. A lightweight and high-rigidity configuration in which a metal thin plate that forms the upper and lower surfaces in the frame surface is filled with foamed resin at a high pressure to give a certain film tension to the metal thin plate,
A plurality of the panel units are arranged with a certain interval between the peripheral frame frames, and a mesh frame is assembled using the opposing peripheral frame frames,
Reinforcing bars are arranged in the formwork, and after connecting blade members of adjacent panel units with node steel plates, concrete is placed in the formwork to build a reinforced concrete mesh frame. To do.
[0013]
Invention of Claim 2 is the construction method of the structure using the panel unit described in Claim 1,
When placing concrete, a formwork that closes the upper surface opening of the formwork is attached.
[0014]
Invention of Claim 3 is the construction method of the structure using the panel unit described in Claim 1 or 2,
The corners of the upper and lower surfaces of adjacent peripheral frame frames are connected with node steel plates, and the node steel plates connecting the upper corners are provided with concrete placement holes, and the upper and lower node steel plates are discarded. It is used as a formwork and is integrated with cast concrete.
[0015]
[Embodiments and Examples of the Present Invention]
Below, embodiment of the construction method of the structure using the panel unit based on the invention described in Claims 1-3 is described based on drawing.
[0016]
FIG. 1 shows an embodiment of a dome-like structure (roof) 1 constructed by combining a reinforced concrete mesh frame 2 and a panel unit 3 in a composite structure constructed by the construction method of the present invention.
[0017]
FIG. 2 shows an embodiment of the panel unit 3 invented to realize the construction method of the present invention. The illustrated panel unit 3 has a plurality of studs 4 attached to the outer surface thereof, and a steel peripheral frame frame 5 having strength and rigidity necessary for holding the unit form, for example, each side having a size of 6 m to 10 m. In the frame surface of the peripheral frame 5, two steel rods 6 as in-plane stiffening members are arranged in a brace shape in the diagonal direction, and the respective ends are formed at the four corners of the peripheral frame 5. The blade member 7 located outside is integrally connected (stress can be transmitted). The two thin metal plates 8 and 8 that form the upper and lower surfaces in the frame surface of the peripheral frame frame 5 are placed in the upper end and the middle part of the peripheral frame frame 5 so as to form a sealed space together with the peripheral frame frame 5. It is attached by means of welding or the like to the upper and lower flanges 5a, 5b provided in the direction (see FIG. 4). Then, the foamed resin 9 is densely filled with a high pressure into the sealed space by a pump or the like, and the metal thin plates 8 and 8 are inflated outwards to generate a convex lens-like peeling on the metal thin plates 8 and 8. A large membrane tension is applied as prestress. The panel unit 3 has a very high out-of-plane rigidity due to the so-called shell effect exhibited by forming the thin metal plates 8 and 8 into a convex lens shape and the film tension applied to the thin metal plates 8 and 8. Become.
[0018]
The foamed resin 9 is desirably curable, and usually a thermosetting resin is used. However, if a urethane-based foamed resin or the like that foams at a temperature close to room temperature is used, preheating that promotes foaming is not required, so that the panel unit 3 can be manufactured and used at the site where the panel unit 3 is constructed.
[0019]
Thus, the thin metal plate 8 holding the pre-stress and the cured foamed resin 9 are integrated to form a panel unit 3 that is lightweight (actual load is about 100 kg ) and highly rigid. Therefore, the base material for stiffening the panel unit 3 is unnecessary, and the roof structure can be reduced in weight as compared with the case where the existing panel is used.
[0020]
Since the panel unit 3 is a large plate having a side of 6 m to 10 m as described above, the panel unit 3 is also excellent in workability when constructed as a composite structure with the mesh frame 2.
[0021]
As a method of constructing the mesh frame 2 and the composite structure (roof) 1 using the panel unit 3 having the above-described configuration, first, a plurality of panel units 3... A plurality are arranged from the periphery toward the center, and are supported from below by the support 11 (see FIG. 5). The distance L between adjacent peripheral frame frames 5 and 5 is adjusted to be substantially equal to the width of the frame 2 (see FIG. 3), and the shape of the mesh frame is formed using the peripheral frame frames 5 and 5 facing each other. The frame 12 is assembled (FIG. 4).
[0022]
Specifically, the lower surface mold 13 (bottom mold) that uses the peripheral frame 5 of the panel unit 3 as a part of the side mold and connects and closes the lower ends of the opposite peripheral frames 5 and 5 on both sides is closed. Attach and assemble the box-shaped form 12 for constructing the mesh frame.
[0023]
In this way, the assembly and installation of the form of the mesh frame is completed together with the arrangement of the panel units 3..., So that the combination of processes is achieved, the construction is rationalized, the construction period is shortened, and the construction is simplified.
[0024]
A rebar of a mesh frame is placed in the mold 12. Among the reinforcing bars, the main reinforcing bars 14 have a form and a structure in which stresses are transmitted to each other at each intersection of the frame 2, and a hoop-like shear reinforcing bar 15 is wound around the reinforcing bars to form a reinforcing bar rod (see FIGS. 4 and 6).
[0025]
In order to allow transmission of stress between the adjacent panel units 3..., The above-described blade members 7 of the panel units 3 are connected to the brace-shaped node steel plate 16. 3 and 6 are plan views showing a state immediately before the blade members 7 are connected to each other by the node steel plate 16 and the concrete 10 is placed in the mold 12. FIG. 4 shows a cross-sectional view of the same state. FIG. 6 shows in detail a state in which the blade members 7.
[0026]
In addition, when the elevation angle of the frame 2 is large, an upper surface mold 17 that closes the upper surface opening of the mold 12 is attached so that the cast concrete 10 does not overflow (see the dotted line 17 in FIG. 4 and FIG. 5). .
[0027]
After the concrete 10 was placed and cured in the mold 12 and the concrete 10 was cured and sufficient strength was developed, the molds 13 and 17 were removed, disassembled, and became unnecessary (proceed to the next step). The support work 11 that is necessary in this case is removed.) When the support work 11 is removed, the construction of the mesh frame 2 made of reinforced concrete is completed. At the same time, the peripheral frame 5 of the panel unit 3 used as a side mold is firmly integrated with the frame 2 by the stud 4, and a part (lower part) of the roof 1 by the composite structure of the mesh frame 2 and the panel unit 3. Is completed.
[0028]
Hereinafter, the above steps are sequentially advanced toward the upper center of the roof 1 to complete the construction of the entire roof as shown in FIG.
[0029]
As shown in FIGS. 5 and 7, as a means for making the strength of the intersection of the frames 2 more rigid, the corners of the upper surface and the lower surface of the adjacent peripheral frame frames 5. It is also preferable to connect 18 and 19. That is, the node steel plates 18 and 19 are attached as discarded molds on the upper surface and the lower surface of the intersection of the frame 2, and the concrete 10 is placed from the concrete placement holes 18a provided in the node steel plate 18 on the upper surface. A stiffening effect is exhibited by integrating 19 and casting concrete 10 (invention of claim 3).
[0030]
[Effects of the present invention]
Since the construction method of the structure using the panel unit according to the first to third aspects uses a lightweight and highly rigid panel unit, a base material for stiffening the panel is unnecessary, and the existing panel is used. Compared to the case, it contributes to cost reduction and weight reduction of the roof.
[0031]
In addition, the installation is rational because the incorporation of the large panel unit and the construction of the frame are constructed in a composite structure in the same process. That is, the work of assembling and installing the formwork and dismantling and removal necessary for the construction of the reinforced concrete frame can be considerably omitted. Therefore, it saves a lot of time, contributes to shortening the construction period and simplifying construction, and greatly contributing to cost reduction.
[0032]
Further, since the peripheral frame of the panel unit also functions as a part of the mesh frame (synthetic material), the bending and shear rigidity of the mesh frame is increased, and the rigidity of the roof is also increased.
[Brief description of the drawings]
FIG. 1 is a front view showing a dome-like structure constructed by a construction method using a panel unit of the present invention.
FIG. 2 is a structural diagram showing a panel unit used in the present invention.
FIG. 3 is a plan view showing a stage immediately before placing concrete.
4 is a longitudinal sectional view of FIG. 3. FIG.
FIG. 5 is a schematic elevation view showing an intermediate stage of disposing the panel unit.
FIG. 6 is an enlarged plan view showing a frame intersection just before placing concrete.
FIG. 7 is an enlarged plan view showing a frame intersection point stiffened by attaching a diaphragm type node steel plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Structure 2 Frame 3 Panel unit 4 Stud 5 Peripheral frame 6 Steel rod 7 Blade material 8 Metal thin plate 9 Foamed resin 10 Concrete 12 Form 14 Main reinforcement 15 Shearing reinforcement 16, 18, 19 Node steel plate 17 Upper formwork

Claims (3)

A construction method of a structure combining a mesh frame and a panel unit,
The panel unit has an in-plane stiffening member disposed in a frame surface of a peripheral frame frame having a stud attached to the outer surface, and an end portion of the panel unit is connected to a blade member located outside the peripheral frame frame. A lightweight and high-rigidity configuration in which a metal thin plate that forms the upper and lower surfaces in the frame surface is filled with foamed resin at a high pressure to give a certain film tension to the metal thin plate,
A plurality of the panel units are arranged with a certain interval between the peripheral frame frames, and a mesh frame is assembled using the opposing peripheral frame frames,
Reinforcing bars are arranged in the formwork, and after connecting blade members of adjacent panel units with node steel plates, concrete is placed in the formwork to build a reinforced concrete mesh frame. To construct a structure using a panel unit. The method for constructing a structure using the panel unit according to claim 1, wherein when placing concrete, a formwork that closes an upper surface opening of the formwork is attached. The corners of the upper and lower surfaces of adjacent peripheral frame frames are connected with node steel plates, and the node steel plates connecting the upper corners are provided with concrete placement holes, and the upper and lower node steel plates are discarded. The method for constructing a structure using the panel unit according to claim 1, wherein the method is used as a mold and integrated with the cast concrete.

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