JP2024029300A - Hollow vertical body used for construction of dome-like member network - Google Patents

Abstract

To improve workability and economy, and to use a height space of a dome effectively by simplifying construction of the dome, with respect to the construction of a dome-like member network according to patent documents 3 and 4.SOLUTION: The present invention has solved two problems by providing a hollow vertical body 8 at a center position of a dome: first, the hollow vertical body 8 makes it possible to construct a dome-like member network with excellent workability and economy; and second, the hollow vertical body 8 facilitates economical construction of an intermediate floor 11 and makes it possible to use a height space of the dome.SELECTED DRAWING: Figure 6

Description

The present invention proposes a new construction method for the construction methods related to Patent Document 3 and Patent Document 4 in which a dome-shaped member network is constructed by forcibly deforming linear members, and furthermore, the present invention proposes a new construction method for the constructed dome-shaped member network. This paper proposes a method for constructing an intermediate floor in the shape of a plurality of perforated circles with a dome-shaped member network as the outer periphery.

When constructing a dome or dome-shaped structure, there are several methods that include constructing temporary scaffolding, shoring, and formwork on-site and pouring concrete, and in order to shorten the construction period and reduce the need for high-altitude work. Various methods have been implemented, such as transporting the various parts manufactured in (See Patent Document 1 and Patent Document 2).

In such conventional methods, it is essential to manufacture and process concrete casting forms and assembly members that match the shape of the dome to be constructed, but the methods of Patent Document 3 and Patent Document 4 differ from these. In a completely different way, by forcibly deforming linear members into an arch shape on site and constructing a dome-shaped member network, the use of temporary scaffolding, shoring, cranes, and other heavy machinery and work at heights are significantly reduced. However, with regard to the construction of the dome-shaped member network, there is a concern that the construction cost will increase due to the complexity of the construction, and there is a need to reduce the construction cost.

A feature of dome-shaped structures is that the distance between the lower and upper surfaces, that is, the upper space, increases toward the center, and baseball fields are examples of effective use of this large upper space. . On the other hand, there are cases where a high overhead space is unnecessary or undesirable. There is a need for a method for effectively utilizing the space above in such cases.

JP 11-06200 JP 10-06101 Patent No. 6063086 Patent No. 6623331

Regarding the construction of the dome-shaped member network according to Patent Document 3 and Patent Document 4, the present invention aims to further simplify the construction of the dome to improve construction efficiency and economic efficiency, and to effectively utilize the space above the dome-shaped structure. The task is to present a method to do so.

By using the hollow vertical body of the present invention in constructing the dome-shaped member network, the problems of economic efficiency and effective use of the upper space can be solved.

In Patent Document 3, a dome-shaped member network is constructed by first arranging straight members 2 radially on a foundation 1, and locking the outer ends of the straight members 2 with surrounding wires 4 to form a planar member network. (see the broken line in circle 1 in Figure 1), and the middle part of this plane member network is raised with a temporary vertical support 6 installed on the substructure 7 to construct a convex member network (see Figure 1 - circle 2). (see I dotted chain line in Figure 1), then the diameter of this convex member network is reduced and the ends of the linear members are fixed to the annular support 5 to construct a dome-shaped member network with span L and rise f (Figure 1). -Refer to the solid line in circle 3).

Here, the straight member 2 used to construct the dome-shaped member network has a length S0/2, which is half the arc length S0 of the dome-shaped member network to be constructed. By fixing the inner end of this linear member 2 to the circular fixing plate 3 in a horizontal manner, it is structurally regarded as one member having a length S0.

The linear member 2 used has a cross section with a height h and a width b shown in FIG. 2, with the weak axis 2b of the cross section widened in order to prevent buckling in the lateral direction. The cross-section strong shaft 2a used is made of high-strength steel, but the weak shaft 2b is intended to increase rigidity, and is usually made of a material that is lower in strength than the strong shaft 2a. be done.

Unlike the process of Patent Document 3, the construction of the dome-shaped member network of the present application does not involve the formation process of the planar member network indicated by the broken line in circle 1 in FIG. It starts with building a network of parts.

The process starts by installing the hollow vertical body 8, which is a component of the dome-shaped member network, on the substructure 9 (see FIG. 3). The height of the hollow vertical body 8 corresponds to the rise f of the dome-shaped member network (see FIG. 5(a)), and its cross section is circular or rectangular (see FIG. 5(b)), and its size is fixed to a circular shape. This corresponds to the diameter Δ of the plate 3 (see FIG. 4).

A circular fixing plate 3 (see FIG. 4) is arranged at the top of the hollow vertical body 8, and the inner ends of the plurality of linear members 2 constituting the dome-shaped member network are fixed to the circular fixing plate 3. The intermediate part of the linear member 2 is supported by the holding member 6e of one or more temporary vertical support stands 6, and the outer end of the plurality of linear members 2 that extend outside and do not land can be slid in the enclosing direction. is free and is locked by a surrounding wire 4 which cannot be moved in the radial direction. In this way, a convex member network is constructed (see the dashed line in circle 2 in FIG. 3).

As shown in FIG. 7, the temporary vertical support stand 6 is composed of two parallel plates 6a, a lower bottom plate 6b, an upper width stopper 6c, and a diagonal member 6d for holding the parallel plates 6 upright. ing. The linear member 2 passes through the U-shape of the parallel plate 6a, is supported by the holding member 6e, and is free to move upward, that is, in the radial direction, but is restricted from moving in the lateral direction, so it cannot be compressed. Lateral buckling of the straight member 2 in the diameter is prevented.

The diameter of the linear member 2 whose inner end portion and intermediate portion are restricted from moving in the lateral direction is reduced. The diameter reduction is performed by applying a horizontal force ΣH to the end of the straight member 2 and pulling the end of the straight member 2 toward the annular support 5 (see the one-dot chain line in circle 2 in Figure 3). The linear member 2 separates from the holding member 6e of the vertical support base 6 to form an arch shape and is fixed to the annular support 5, so that a dome-shaped member network is constructed by the plurality of linear members 2 (see the solid line in circle 3 in FIG. 3).

At first glance, the method of constructing the dome-shaped member network of the present application is similar to that of "Patent Document 4", but there are major differences. Although ``Patent Document 4'' proposes that a central support is provided at the center of the dome, the central support in ``Patent Document 4'' is temporary. On the other hand, the hollow vertical body 8 of the present application is not a temporary structure, but a structure of a network of dome-shaped members, and is a permanent structure.

As methods for reducing the diameter, there are a method of tightening the surrounding wire 4 and a method of drawing the outer end of the straight member 2 to the annular support 5.

The non-landing end of the linear member 2 is drawn to the annular support 5 by the diameter reduction of the horizontal force ΣH=Hr. Hr is a forced horizontal force for deforming the straight member 2 into an arch shape. Due to the diameter reduction, the middle part of the straight member 2 is separated from the holding material 6e of the vertical support 6, and the end part is fixed to the annular support 5 (see the solid line in circle 3 in FIG. 3).

When the end of the linear member 2 lands on the annular support 5, a horizontal force Hg is generated due to the arch's own weight, and the diameter reduction force ΣH rapidly increases to ΣH=Hr+Hg. The rapidly increased horizontal force ΣH is supported by the annular support 5.

The annular support 5 needs to be able to bear not only the horizontal force ΣH=Hr+Hg due to the dome-shaped member network, but also the horizontal force generated by the dome-shaped structure that will be constructed later, so a prestressed concrete (PC) structure is mainly adopted. be done.

Usually, domes are mainly used for stadiums, baseball stadiums, etc. that require upward space. When no upper space is required, a flat dome with a small rise is considered, but in reality, domes are rarely used when no upper space is required.

It is predicted that demand for domes will increase if the space above can be used effectively.
The intermediate floor 11 (see FIG. 6(a)) of the present application is an example of effective use of the upper space, and is one of the major solutions. It is believed that by providing the hollow vertical body 8 of the present invention, construction of the intermediate floor 11 will be simplified, and the use of the dome will be promoted in a wide range of areas.

If there is no hollow vertical body 8, the intermediate floor 11 will have a circular structure whose diameter is the inner diameter of the dome, and the intermediate floor 11 will be required to have a large proof strength. In the present application, since the hollow vertical body 8 is provided at the center of the dome, the intermediate floor 11 has a perforated circular structure, and the proof stress required for the intermediate floor 11 is extremely small compared to the case where the hollow vertical body 8 is not provided. In this way, the hollow vertical body 8 reduces the structural strength required for the intermediate floor 11, so that the hollow vertical body has an extremely effective effect on the construction efficiency and economy of the intermediate floor 11.

Although FIG. 6(a) shows a case where the intermediate floor is one layer, it is also possible to construct a dome having multiple layers as shown in FIG. 6(b).

As described above, the two problems of improving the workability and economy of constructing a dome-shaped member network and effectively utilizing the space above the dome are solved by providing the hollow vertical body 8 at the center of the dome. .

The intermediate floor 11 is constructed as follows (see FIG. 8).
The intermediate portions of the linear members 2 of the dome-shaped member network are connected and fixed to each other by a width stopper steel 21. The width stop steel 21 on the inner periphery of the dome and the overhanging part 81 on the outer periphery of the hollow vertical body 8 are connected by a plurality of support beams 111 (see the AA cross section in FIG. 8), and a plurality of fan-shaped slabs are mounted on the support beams 111. 112 (see the BB cross section in FIG. 8), the perforated circular intermediate floor 11 is constructed. Support beams 111 and fan-shaped slabs 112 are selected that have a strength suitable for the intended use of intermediate floor 11.

The structure of the intermediate floor 11 is such that the width stopper steel 21 and the overhanging portion 81 of the hollow vertical body 8 are directly integrated by the fan-shaped slab 112 without using the support beam 111 as described above.

It is an explanatory view of the construction process of the conventional landing type dome-shaped member network. It is a cross section of a straight member. FIG. 3 is an explanatory diagram of a dome-shaped member network provided with hollow vertical bodies. It is an explanatory view of a circular fixed plate. They are a side view and a sectional view of a hollow vertical body. It is an explanatory view of a dome-shaped member network provided with an intermediate floor. It is an explanatory view of a vertical support stand. It is an explanatory view of an intermediate floor. FIG. 3 is a plan view and a sectional view of a network of dome-shaped members having hollow vertical bodies. FIG. 3 is an explanatory diagram of an embodiment having a hollow vertical body and an intermediate floor. 1 is a perspective view of an embodiment with a hollow vertical body and an intermediate floor; FIG.

(Example 1) Construction of a dome-shaped member network provided with hollow vertical bodies 8 will be explained using FIGS. 9 and 10. The dome-shaped member network to be constructed is assumed to be a medium-sized dome-shaped member network.

In the dome-shaped member network provided with the hollow vertical bodies 8, as shown in FIG. 9(a), all 16 linear members 2 required for construction are arranged at equal intervals to form a convex member network.
In the conventional method as shown in Fig. 1 (Patent Document 4), each eight straight members 2 are usually used separately for primary and secondary construction, so the planar member network is made up of eight straight members 2. configured. The dome-shaped member network provided with the hollow vertical bodies 8 has the advantage that 16 straight members 2 only need to be arranged once.

On the foundation work 1, concrete is poured for the substructure 9 of the hollow vertical body 8, the substructure 7 of the vertical support stand 6, and the annular support 5 of the dome-shaped member network. After the concrete has cured, the hollow vertical body 8 and the vertical support 6 are fixed to the above-mentioned substructure, respectively.
The hollow vertical body 8 may be constructed of concrete, but in order to shorten the construction period, it is constructed by splicing steel pipes of diameter Δ up to the required height f. A disk fixing plate 3 is installed at the top of the constructed hollow vertical body 8.

The intermediate portions of the 16 straight members 2 having a length S0/2 of the cross-shaped cross section shown in FIG. The inner end of the linear member 2 extending inward from the vertical support base 6 is lifted by a crane or the like and fixed to the circular fixing plate 3 using the fixing plate 3a, bolts 3b, and nuts 3c (see FIG. 4).

The ends of the linear members 2 extending outward from the vertical support stand 6 and floating from the foundation work 1 are connected by surrounding wires 4 to construct a network of convex members (see the solid line in FIG. 9(b)).

By reducing the diameter by applying a horizontal force ΣH to the end of the straight member 2 of the convex member network, the straight member 2 separates from the holding member 6e of the vertical support 6 and becomes arched, causing the end of the straight member 2 to become annular. When the diameter is reduced to the bearing 5, the rise reaches f, and a dome-shaped member network is constructed by fixing the end of the straight member 2 to the annular bearing 5 (see the broken line in Fig. 9(b)). The vertical support stand 6 is removed.

Using the constructed dome-shaped member network as a basic structure, various dome structures, such as thin-layer domes, steel structures, or concrete structures, are constructed. The structure of the annular support 5 is determined so as to withstand the horizontal force generated by the post-structure constructed using a network of dome-shaped members. Usually, concrete construction using PC structure or RC structure is selected.

FIG. 10 is an explanatory diagram of a dome-shaped member network provided with an intermediate floor 11. The plan view of FIG. 10A shows a plurality of fan-shaped slabs 112 on the first floor floor 10 and the intermediate floor 11. The intermediate floor 11 increases the total floor area of the dome, and the effectiveness of the intermediate floor 11 is recognized. At the same time, the intermediate floor 11 can be said to be an extremely effective use of the height space of the dome.

Elevating facilities 12 such as stairs to the intermediate floor 11 and automatic elevating devices are provided inside or on the outer periphery of the hollow vertical body 8 (see FIG. 10(b)).

FIG. 11 is a perspective view of an example of a network of dome-shaped members having a hollow vertical body 8 and an intermediate floor 11. As shown in FIG. The intermediate floor 11 makes it possible to realize an impressive network of dome-shaped members.

1: Foundation work 2: Straight member 2a: Strong axis of cross section 2b: Weak axis of cross section 21: Width stopper steel of straight member 3: Circular fixed plate 3a: Fixed plate 3b: Bolt 3c: Nut 4: Surrounding wire 5: Annular Support 6: Temporary vertical support 6a: Parallel plate 6b: Bottom plate 6c: Width stopper 6d: Diagonal member 6e: Retainer 7: Substructure of vertical support 8: Permanent hollow vertical body 81: Hollow vertical body External overhang 9: Hollow vertical substructure 10: Floor floor 11: Intermediate floor 111: Support beam 112: Fan-shaped slab 12: Lifting facility L: Span of dome-shaped member network S0: Arc length f of dome-shaped member network : Rise h of the dome-shaped member network: Height b of the linear member: Width Δ of the linear member: Diameter of the circular fixing plate Circle 1: Plane member network circle 2: Convex member network circle 3: Dome-shaped member network

Claims (6)

A permanent hollow vertical body used to construct a dome-shaped member network of a frame structure using straight members, the permanent hollow vertical body having a height approximately equal to the height of the center of the dome-shaped member network to be constructed. A hollow vertical body is installed in a substructure provided at the center of the dome to be constructed, a circular fixing plate is arranged at the top of the hollow vertical body, and a plurality of parts forming a dome-shaped member network are attached to the circular fixing plate. The inner ends of the linear members are fixed, the intermediate parts of the linear members are supported by the holding members of one or more vertical supports, and the outer ends of the plurality of linear members that extend outside and do not land are fixed. , a convex member network is constructed by locking with an enclosing wire that is free to slide in the enclosing direction but not movable in the radial direction, and the outer ends of the linear members forming the convex member network are A dome-shaped member network is constructed by reducing the diameter by applying an inward horizontal force to the linear member, and pulling and fixing the outer end of the linear member to the annular support of the dome-shaped member network. A permanent hollow vertical body used in the construction of a dome-shaped member network. A perforated circular shape constructed according to claim 1, characterized in that it is constructed by supporting the width stopper steel on the inner periphery of the middle part of the dome-shaped member network and the overhanging part of the outer periphery of the middle part of the hollow vertical body. intermediate floor. An elevating facility, characterized in that it is provided inside or on the outer periphery of a hollow vertical body for elevating between a foundation floor and the intermediate floor above it as claimed in claim 2. A dome-shaped member network with a frame structure constructed using straight members and a hollow vertical body, the permanent hollow vertical body having a height approximately equal to the height of the center of the dome-shaped member network to be constructed, It is installed in the substructure provided at the center of the dome to be constructed, and a circular fixed plate is arranged at the top of the hollow vertical body, and the inside of the plurality of linear members constituting the dome-shaped member network is attached to the circular fixed plate. The ends are fixed, the intermediate parts of the linear members are supported by the holding members of one or more vertical supports, and the outer ends of the plurality of linear members that extend outside and do not land are fixed in the enclosing direction. By locking with surrounding wires that are free to slide and cannot move radially, a network of convex members is constructed, with an inward horizontal line at the outer end of the straight members forming the network of convex members. A network of dome-shaped members, characterized in that it is constructed by reducing the diameter by applying a force, and pulling and fixing the outer end of the straight member to an annular support of the network of dome-shaped members. A dome-shaped member network constructed according to claim 4, wherein the hole is constructed by supporting the width stopper steel on the inner periphery of the intermediate portion of the dome-shaped member network and the overhanging portion on the outer periphery of the intermediate portion of the hollow vertical body. A dome-shaped member network further comprising an open circular intermediate floor. The dome-shaped member network constructed according to claim 5, further comprising a lifting facility provided inside or on the outer periphery of the hollow vertical body for lifting between the base floor and the intermediate floor above it. A dome-shaped member network characterized by: