JPH11256690A - Constructing method of roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the constructing method of a roof structure, in which a temporary equipment can be curtailed largely, construction cost in reduced and the term of works is shortened by adopting a simple working equipment. SOLUTION: The shape of a roof slab 1 is retained in a shape according to a design by a tie rod 6, and the roof slab 1 is field-assembled and built on a ground surface, and crossed and constructed on a first temporary support 4 at a central section of a foundation G and on an outer-circumferential supporting section 3 on a circular outer-circumferential building frame by using a lift such as cranes 8, 9. The same roof slab 1 is crossed and built on the first temporary support 4 and the outer-circumferential supporting section 3 at point symmetrical places regarding the first temporary support 4, and the crossing and construction of the same roof slabs are repeated successively at one spaces among the outer-circumferential supporting sections 3, 3, thus erecting a circular roof. When several pairs of the roof slabs 1 are built and formed in stable structure, the tie rods 6 (and second temporary supports 5) are removed, and used and sent to the roof slabs, etc. which are not constructed yet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a roof structure for constructing a circular roof in a large-space building such as a stadium, a gymnasium, a factory, an exhibition hall, etc. It is.

[0002]

2. Description of the Related Art Conventionally, various proposals have been made as to a method of constructing a roof structure for constructing a circular roof in a large space building of a stadium such as a coal storage, a stone storage warehouse, a baseball stadium or the like. The present applicant has already made some proposals for building a large circular roof in this kind of large space building. For example, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-139039, an outer peripheral support member for supporting an upwardly convex roof slab is constructed on a foundation on which a roof structure is installed, and an inner peripheral support member is provided. A roof slab is laid on one of the foundations, and a cable is tightened between opposing sides of the roof slab to narrow the roof slab to a predetermined distance. Are moved to a position where they face each other, and an inner peripheral portion of the outer peripheral support member and a side portion of the roof slab are joined by a joining material. Further, as disclosed in Japanese Patent Application Laid-Open No. 9-209571, a plurality of bundles are vertically arranged from the lower surface of the roof slab so as to surround the center of the roof slab and have the same configuration as the above-described roof slab. The ends of the timber are connected in a ring shape with connecting members, and cables are radially arranged from the ends of these bundles toward the outer periphery of the roof slab.These cables are connected to the outer periphery of the roof slab via a plurality of balance bundles. There is one that is fixed and narrows a gap between both ends of the roof slab to a predetermined interval by tensioning and pulling each of the cables. The process of constructing this with a lift-up device is the same as described above. Further, as disclosed in Japanese Patent Application Laid-Open No. 9-250199, a fixed roof is installed facing the center of the roof, and a movable roof is installed in an opening adjacent to the fixed roof. A method for constructing an openable roof, in which a movable roof is constructed at an installation position of a fixed roof, and the movable roof is temporarily fixed so that the movable roof does not turn, and the movable roof is used as a work table to fix the fixed roof. In some constructions, the temporary fixation is released and the movable roof is turned to a predetermined position to complete the construction.

Another example proposed by the applicant other than the present applicant is described in Japanese Patent Publication No. 62-62217 or Japanese Patent Publication No. 62-62218. These construction methods use a moving gantry and a crane, etc., lift the block slab between the central gantry and the outer peripheral stand on the gantry with a crane, move these together with the moving gantry to a predetermined installation position, The present invention relates to a construction method for fixing each roof slab by sequentially repeating this.

[0004]

However, in such a construction method, in the case of using a tension member such as a wire or a cable in order to maintain the design shape of the roof slab,
These tendons are used not only for shape retention but also for introducing prestress to make the roof slab upwardly convex, and for this purpose, a tensioning operation is performed using a jack or the like. And, since the roof slab is lifted up on the support member by the lift-up device and constructed, large-scale equipment such as jacks and lift-up devices are required, and preparation work for installing these is required, thereby reducing construction costs. Was difficult. Further, in the case of using the moving gantry or the like, work equipment such as installation of rails for the moving gantry becomes large-scale, and a large amount of preparation work is required, so that it is impossible to reduce the construction period and cost. there were.

Therefore, the present invention solves the problem of the conventional method of constructing a roof structure, and adopts simple work equipment, thereby making it possible to greatly reduce temporary equipment, reduce work costs, and shorten the construction period. It is an object of the present invention to provide a method for constructing a roof structure.

[0006]

According to a first aspect of the present invention, a first temporary support is constructed on a central portion of a foundation in a circular structure, and a plurality of outer peripheral bodies are provided on a circular outer peripheral frame on the foundation. In a method for constructing a roof structure in which a support portion is provided and a fan-shaped roof plate is sequentially assembled between the upper portion of the first temporary support and each of the outer peripheral support portions to construct a circular roof, the roof plate is designed with tie rods. After retaining the shape and building the ground on the ground surface, using a lifting machine such as a crane to build over the first temporary support and the outer peripheral support, and then constructing a point-symmetrical position with respect to the first temporary support A similar roof slab is laid on the first temporary support and the outer peripheral support section, and then the roof slab is repeatedly laid and constructed in the same manner as described above sequentially across one gap between the outer peripheral support sections. Characterized by constructing It is intended. Further, according to the present invention, the tie rods are removed at the time when several sets of roof slabs located at point symmetric positions with respect to at least the first temporary support column are laid and the stable state of the structures is secured. , Which are attached to another unconstructed roof slab, and are sequentially reused. According to a second aspect of the present invention, a first temporary support is constructed on a center of a foundation in a circular structure, and a large number of outer peripheral supports are provided on a circular outer peripheral body on the foundation. In a method of constructing a roof structure in which a circular roof is constructed by sequentially assembling a fan-shaped roof slab between an upper portion of a support and an upper portion of each outer peripheral support portion, a first roof slab in which the roof slab is radially divided into two parts; In addition to a second roof slab, a plurality of second temporary stanchions are constructed around the first temporary stanchion and an outer peripheral support portion, and the first and second roof slabs are each maintained in a design shape by a tie rod. After shaping and building the ground on the ground,
After the first roof slab is laid over the second temporary support and the outer peripheral support using a crane or other lifting machine, the second roof slab is laid over the first temporary support and the second temporary support. Then, the same first and second roof slabs are straddled and constructed on the first temporary support, the second temporary support and the outer peripheral support which are point-symmetric with respect to the first temporary support, and then the outer peripheral support is constructed. It is characterized in that a circular roof is constructed by repeating the construction of the roof slab sequentially in the same manner as described above, with one gap therebetween. Further, the present invention provides the tie rod and the second temporary support, in which several sets of the first roof slab and the second roof slab at a point symmetric position with respect to at least the first temporary support are laid and constructed. When the body is in a stable state, it is removed and attached to another unbuilt roof slab or moved to another unbuilt position, and it is used repeatedly, which solves these problems. Means.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of a method for constructing a roof structure according to the present invention. FIG. 1 is a perspective view and a side view showing a construction state of a circular roof structure at an initial stage of construction, and FIG. Enlarged view of the roof slab and its tie rod connection, Fig. 3
FIG. 4 is a plan view showing a state in which each first roof slab is laid, and FIG.
Is a plan view showing a state in which the second roof slab has also been constructed and several fan-shaped roof slabs have been assembled, FIG. 5 is a side view thereof, and FIG. 6 is a plan view showing a state in which construction of the roof structure has been completed. is there. FIG.
As shown in FIG. 3 to FIG. 3, in the present invention, a circular structure constituting a large space building such as a stadium, a gymnasium, a factory, an exhibition hall and the like, such as a coal storage, a stone storage warehouse and a baseball stadium has a circular foundation G. A first temporary support 4 is constructed on the center of the foundation G in the circular structure, and a large number of outer peripheral supports 3, 3... Are provided on the circular outer peripheral frame on the foundation G. Can be (These plurality of outer peripheral support portions 3, 3,... May be formed as continuous ring-shaped outer peripheral support portions.) The upper portion of the first temporary support column 4 and the upper portion of each outer peripheral support portion 3 are formed. A circular roof is constructed by sequentially assembling fan-shaped roof slabs between them. As the circular structure, a three-dimensional truss structure in which the axial load is dispersed is suitable, but it goes without saying that it may be formed of a general steel structure.

In this embodiment, as shown in FIGS. 1, 4 and 5, the roof slab is composed of a first roof slab 1 and a second roof slab 2 which are divided into two in the radial direction.
A plurality of second temporary supports 5 are constructed around the first temporary support 4 at the center of the first temporary support 4 and the outer peripheral support 3, and the first and second roof slabs 1 and 2 are connected to tie rods 6 and 7 ( FIG.
) To form the first roof slab 1 using a lifting machine such as a crane.
On the second temporary support 2 and the outer peripheral support 3. Due to the presence of the tie rods 6, 7, the roof slab is not deformed when lifted by a crane. As shown in FIG. 2, the first roof slab 1 (the second roof slab 2 has the same configuration and will not be described in detail.) Has an upwardly convex design shape made of H-section steel or the like. 2
As shown in FIGS. 2 (B) and 2 (C), which are enlarged views of portions B and C of FIG. 2 (A), an upper bracket 12 and a lower bracket are provided on the upper and lower portions of the lower surface of the first roof slab 1, respectively. 13 and these upper and lower brackets 12,
The tie rod 6 is stretched between 13. The lower end of the tie rod 6 is attached to the lower bracket 13 by a support pin 15.
At the same time, the upper end thereof is penetrated by the upper bracket 12 and is fixed by a tightening nut 14. By adjusting the screwing position of the tightening nut 14 to the upper end of the tie rod 6, it is possible to maintain a design shape that is convex above the first roof slab 1. FIG.
Shows a state in which a large number of the first roof slabs 1 laid in this manner are arranged on the foundation G.

As described above, the first roof slab 1 which is laid on the foundation G and whose design is maintained by the tightening of the tie rods 6 is lifted by the small crane 9 and the large crane 8 as shown in FIG. And over the outer peripheral support portion 3 and the second temporary support column 5. Reference numeral 10 indicates a safety net for finishing work of the roof slab. As shown in FIG. 4, the first roof slab 1 which is constructed so as to span between the outer peripheral support portion 3 and the second temporary support column 5 in one block has one Between the pair of first roof slabs 1 and 1 and between the second temporary support 5 and the first temporary support 4 from the center between the pair of first roof slabs 1 and 1. Then, the second roof slab 2 is lifted up by a large crane 8 or the like to be laid and constructed. The second roof slab 2 is made of a straight V-shaped H-shaped steel that forms both sides of a fan shape, and is laid on the foundation G like the first roof slab 1 and tightens the tie rods 7. Keeps the design shape.

[0010] When the first roof slab 1-1 and 1-1 and the second roof slab 2-1 in one block are laid in this manner, these first roof slabs 1-1 and 1-1 are laid. A roof member is constructed by a truss, a steel beam or the like in a space formed between the second roof plate 2-1 and the flat V-shaped roof plate 2-1. During this construction work, the safety of the worker is ensured by the safety net 10 provided on the lower surfaces of the first and second roof slabs 1, 2. Next, on the first temporary support 4, the second temporary support 5, 5 and the outer peripheral support parts 3, 3,... Which are point-symmetric with respect to the first temporary support 4, the same first and second roof slabs 1 'are provided. -1, 1'-1 and 2'-1.
Thus, when the construction of one block of a set of roof slabs and '(see FIG. 6) at a point symmetrical position with respect to the first temporary support 4 is completed, as shown by the symbol S, the outer peripheral support portion 3,
The first blocks 1 and 1-2 and the second blocks 2 and 2-2, which are the next blocks and ', and the first block 4 and the first block 4 are point-symmetrical to each other with one gap between them. A first roof slab 1'-2, 1'-2 and a second roof slab 2'-2 are laid and constructed. Then, a roof member is constructed by a truss, a steel beam or the like in a space of the gaps S and S ′ between the blocks. In the present embodiment, a tie rod attached to a roof slab 1-1, 2-1, 1'-1, 2'-1 in a state where a roof member is constructed in a space between gaps S and S 'between blocks. 6, 7 and the second temporary support 5 are removed and moved to another unconstructed roof slab or another unconstructed position. In this way, several sets of the first roof slabs 1 and 1 and the second roof slabs 2 that are at point symmetric positions with respect to at least the first temporary support columns 4 are erected and constructed, and the stable state of those structures is maintained. Is secured, the tie rods 6, 7 and the second temporary supports 5, 5 are removed, the tie rods 6, 7 are attached to the other unconstructed roof slabs 1, 2, and the second temporary supports 5 are It is moved to an unconstructed position and is reused sequentially.
This is sequentially repeated to construct a circular roof.

In the present embodiment, since each roof slab to be assembled into blocks on the foundation G can be made small by employing the above-described construction method, the working time can be reduced and the space for assembling the blocks can be reduced. And the burden on the crane is reduced. Moreover, the tie rods installed to maintain the design shape of the roof slab are not particularly prestressed, and the tightening operation is a simple operation of simply rotating the tightening nut using a spanner or the like. Furthermore, when several sets of roof slabs of each block are laid and constructed, and the stable state of those structures is secured, the tie rods and the second temporary support columns are removed, and other unconstructed roof slabs and other Since it can be moved to an unstructured position and installed and reused sequentially, it is possible to greatly reduce temporary equipment, reduce work costs, and shorten the construction period.

FIG. 7 shows a second embodiment of the method of constructing a roof structure according to the present invention.
The roof slabs of the two blocks are the first roof slab 1 on the radial outside.
And the inside second roof slab 2 to form one fan shape. In one block, the outer peripheral support portion 3 and the second
The first roof slab 1 is suspended by a crane or the like over the temporary support 5, and the first roof slab 1 is straddled and constructed. The second roof slab 1 extends over the second temporary support 5 from the center and the first temporary support 4. The roof slab 2 is lifted up by a crane or the like and laid and constructed. The first and second roof slabs 1 and 2 laid on the foundation G retain their design shapes by tightening the tie rods 6 and 7, respectively, as in the first embodiment. When the first roof slab 1-1 and the second roof slab 2-1 in one block are straddled and constructed, the first roof slab 1-1 and the flat V-shaped second roof slab 2-1 are connected. A roof member is constructed by a truss, a steel beam, or the like in a space formed therebetween, and then the first temporary support 4
The first temporary support 4, the second temporary support 5, 5 and the outer peripheral supports 3, 3.
And the second roof slabs 1'-1 and 2'-1 are straddled and constructed.

Thus, when the construction of one block of a set of roof slabs located at point symmetric positions with respect to the first temporary support column 4 is completed, as shown by reference numeral S, one gap is provided between the outer peripheral support portions 3. The next block, the first roof slab 1-
The second and second roof slabs 2-2 and the first roof slab 1'-2 and the second roof slab 2'-2 which are point-symmetric with respect to these and the first temporary support 4 are straddled and constructed. Then, a roof member is constructed in the space of the gaps S and S 'between the blocks by using a truss, a steel beam or the like. In this way, at least the first temporary support 4 is located at a point symmetrical position about the first temporary support 4.
When several sets of the roof slabs 1 and the second roof slabs 2 are erected and the stable state of those structures is secured, the tie rods 6, 7 and the second temporary supports 5, 5 are removed,
The tie rods 6 and 7 are attached to the other unconstructed roof slabs 1 and 2, and the second temporary support 5 is moved and installed to another unconstructed position, and is sequentially reused. This is sequentially repeated to construct a circular roof. In the present embodiment, a tie rod attached to a roof slab 1-1, 2-1, 1'-1, 2'-1 in a state where a roof member is constructed in a space between gaps S and S 'between blocks. 6, 7 and the second temporary support 5 are removed and moved to another unconstructed roof slab or another unconstructed position. This embodiment is a construction method suitable for a small-sized circular roof structure, in which the shape of the roof plate of each block composed of the first and second roof plates is simplified, and And the time required for constructing the roof slab is also reduced. As in the above-described embodiment, the tightening operation of the tie rods for maintaining the design shape of the roof slab is a simple operation of simply rotating the tightening nut using a spanner or the like. When several sets of slabs are laid and constructed and their structures are stabilized, the tie rods and the second temporary support are removed and moved to another unconstructed roof slab or another unconstructed position. It can be reused sequentially, and it is possible to greatly reduce temporary equipment, reduce work costs, and shorten the construction period.

FIG. 8 shows a third embodiment of the method for constructing a roof structure according to the present invention. The method according to the third embodiment is suitable for constructing a more compact circular roof structure. Single roof slab 1 in which the block roof slab forms a sector
1. The single roof slab 11 laid on the foundation G retains its design shape by the tightening of the tie rods 16, and a crane or the like extends between the outer peripheral support 3 and the first temporary support 4 in one block. The single roof slab 11-1 is lifted up and straddled and constructed, and the same single roof slab 11′- is placed on the first temporary support 4 and the outer peripheral support 3 which are point-symmetric with respect to the first temporary support 4. 1 is constructed. When the construction is completed, as shown by a reference symbol S, the single block slab 11-2 as the next block and these and the first temporary support 4 are separated by one gap between the outer peripheral supports 3 and 3. A single roof slab 11'-2 at the symmetric position is straddled and constructed. Then, a roof member is constructed in the space of the gaps S and S 'between the blocks by using a truss, a steel beam or the like.

In this way, several sets of the first roof slab 1 and the second roof slab 2 which are at point symmetric positions with respect to at least the first temporary support column 4 are erected and constructed, and the structures thereof are stabilized. When the condition is secured, the tie rod 16 is removed, attached to another unbuilt roof slab, and sequentially reused. This is sequentially repeated to construct a circular roof. According to the present embodiment, the shape of the roof slab of each block is further simplified, and the work time required for laying and constructing the roof slab is also reduced. As in the above-described embodiment, the tightening operation of the tie rods for maintaining the design shape of the roof slab is a simple operation of simply rotating the tightening nut using a spanner or the like. When several sets of slabs have been laid and the stable state of those structures has been ensured, the tie rods can be removed, re-installed on another unbuilt roof slab, and reused one after another. It is possible to greatly reduce the equipment, reduce the operation cost, and shorten the construction period.

The embodiments of the present invention have been described above. However, within the scope of the present invention, the shapes of the first and second roof slabs, the form of extending the tie rods on the roof slabs, Form of fixation on first temporary support, second temporary support and outer peripheral support, shape of first temporary support, second temporary support and outer support, truss structure or steel frame structure constituting roof slab, second temporary support For example, the moving mode can be appropriately adopted.

[0017]

As described above in detail, according to the present invention, even when a large-sized roof structure is constructed, the roof slabs divided into a plurality of roof slabs are assembled into blocks on the foundation. Since the plate can be small, the work time is reduced, no space is required for assembling the blocks, and the burden on the crane is reduced. Moreover, the tie rods installed to maintain the design shape of the roof slab are not particularly prestressed, and the tightening operation is a simple operation of simply rotating the tightening nut using a spanner or the like. Further, when several sets of roof slabs of each block are laid and constructed, and the stable state of those structures is secured, the tie rods and the second temporary support columns are removed, and other unconstructed roof slabs and other non-constructed roof slabs are removed. Since it can be moved to the construction position and used sequentially, it is possible to greatly reduce temporary equipment, reduce work costs, and shorten the construction period. Moreover, these temporary equipment can be easily removed. Thus, according to the present invention,
The adoption of simple work equipment and the efficient construction of a roof slab made of steel truss or general steel frame has led to a method of constructing a roof structure that has made it possible to significantly reduce temporary equipment, reduce work costs, and shorten the construction period. Provided.

[Brief description of the drawings]

FIG. 1 is a perspective view and a side view showing a first embodiment of a method of constructing a roof structure according to the present invention, showing a construction state of a circular roof structure at an initial stage of construction.

FIG. 2 shows the first embodiment of the method of constructing a roof structure according to the present invention, and is an enlarged view of a roof slab and a tie rod connecting portion thereof.

FIG. 3 is a plan view showing the first embodiment of the method for constructing a roof structure according to the present invention, and showing a state where each first roof slab is laid.

FIG. 4 is a plan view showing the first embodiment of the method for constructing a roof structure according to the present invention, in which a second roof slab is also constructed and several fan-shaped roof slabs are assembled. .

FIG. 5 is a side view of FIG. 4, showing a first embodiment of a method for constructing a roof structure according to the present invention.

FIG. 6 is a plan view showing a first embodiment of the method for constructing a roof structure according to the present invention, and showing a state where the construction of the roof structure is completed.

FIG. 7 is a plan view and a side view showing a second embodiment of the method for constructing a roof structure according to the present invention.

FIG. 8 is a plan view and a side view showing a third embodiment of the method for constructing a roof structure according to the present invention.

[Description of Signs] 1 ・ ・ ・ First roof plate 2 ・ ・ ・ Second roof plate 3 ・ ・ ・ Peripheral support part 4 ・ ・ ・ First temporary support 5 ・ ・ ・ Second temporary support 6 ・ ・ ・ First Tie rod 7 Second tie rod 8 Large crane 9 Small crane 10 Safety net 11 Single roof plate 12 Upper bracket 13 Lower bracket 14 Tightening nut 15 ・ ・ ・ Support pin 16 ・ ・ ・ Single tie rod G ・ ・ ・ Foundation S ・ ・ ・ Gap between roof slabs

Claims (4)

[Claims] 1. A first temporary support is constructed on a central portion of a foundation in a circular structure, a plurality of outer peripheral supports are provided on a circular outer peripheral frame on the foundation, and an upper portion of each of the first temporary support and In a construction method of a roof structure in which a circular roof is constructed by sequentially assembling a fan-shaped roof slab between the outer peripheral support portion, after the roof slab is shaped into a design shape by tie rods and a ground construction is constructed on the ground surface, Using a lifting machine such as a crane, the bridge is constructed so as to straddle the first temporary support and the outer peripheral support, and then a similar roof is provided on the first temporary support and the outer peripheral support at a point symmetrical position with respect to the first temporary support. A method for constructing a roof structure, comprising: constructing a slab, and successively repeating the slab construction of the roof slab in the same manner as described above with one gap between the outer peripheral supports to construct a circular roof. 2. The tie rod according to claim 1, wherein the tie rod includes at least the first tie rod.
Several sets of roof slabs at point symmetrical positions around the temporary support pillars were erected and removed when a stable state of those structures was secured, and they were removed and attached to other unconstructed roof slabs, in order. The method for constructing a roof structure according to claim 1, wherein the roof structure is reused. 3. A first temporary support is constructed on a central portion of a foundation in a circular structure, a plurality of outer peripheral supports are provided on a circular outer peripheral frame on the foundation, and an upper portion of each of the first temporary support and In a method of constructing a roof structure in which a circular roof is constructed by sequentially assembling a fan-shaped roof slab between the roof slab and an upper portion of an outer peripheral support portion, the roof slab is divided into two in the radial direction by a first roof slab and a second roof slab. A plurality of second temporary supports are constructed around the first temporary support and an outer peripheral support portion, and the first and second roof slabs are each shaped into a design shape by a tie rod, and a ground surface is formed. After constructing the groundwork, the first roof slab is connected to the second roof using a lifting machine such as a crane.
After the bridge is constructed on the temporary support and the outer peripheral support, the second roof slab is constructed on the first temporary support and the second temporary support, and then the second roof slab is located at a point symmetric position with respect to the first temporary support. The same first and second roof slabs are straddled and constructed on one temporary support, the second temporary support, and the outer peripheral support, and then the roof slab is sequentially straddled in the same manner as described above with one gap between the outer peripheral supports. A method for constructing a roof structure, comprising: constructing a circular roof by repeating installation and construction. 4. The tie rod and the second temporary support,
At least several sets of the first roof slab and the second roof slab at the point symmetrical position with respect to the first temporary support column as the center are erected and removed when a stable state of those structures is secured. 4. The method of constructing a roof structure according to claim 3, wherein the roof structure is attached to an unconstructed roof slab or moved to another unconstructed position and sequentially reused.