JPH09296556A - Construction method of membrane structure roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large-scale membrane structure roof for a new or existing sports ground, baseball ground, or the like. SOLUTION: Two or more main towers 1 are erected on an exterior wall or the outside of a sports ground or the like, and a main cable 2 is suspended in such a way as to bridge two main towers 1. A large number of side cables 3 dividing the main cable 2 positioned between the main towers 1 are connected vertically to the main cable 2. One ends of a large number of hanger cables 4 are connected into predetermined positions of the respective side cables 3, and the other ends are connected to a membrane roof 5. The main cable 2 is then stretched and fixed.

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 large-scale membrane roof for a new or existing stadium, a stadium, etc., which comprises a roof membrane and cables.

[0002]

2. Description of the Related Art Conventional existing stadiums or stadiums are not equipped with facilities such as roofs to avoid rain.
The competitions were affected by the weather, and some competitions had to be canceled in case of rain. As a solution to this problem, it is known to provide an air dome type or truss structure type roof. However, the construction cost of these roofs is enormous, and when installing roofs of these structures in existing stadiums, etc., it is necessary to temporarily install struts, etc. There was a problem that facilities such as stadiums could not be used for a long period of time.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the construction cost can be reduced, there is no need to specially install the pillars or the like, and the stadium or the stadium or the like which can reduce the suspension period of the existing stadium or the like. To provide a method for constructing a membrane cable structure roof for.

[0004]

According to the present invention, there is provided a method for constructing a large-scale membrane roof for a new or existing stadium, stadium, or the like. Books or more main towers are erected, a main cable is installed so as to bridge two main towers, and a number of side cables that divide the main cable located between the main towers are connected to the main cable. Connect vertically, connect one end of many hanger cables to the predetermined position of each side cable, connect the other end to the membrane roof, and then stretch and fix the main cable, This is solved by a method for constructing a membrane structure roof in which tension is applied to both ends of the side cable and the roof membrane to fix them. Furthermore, it is preferred to use a linear winch to tension the main cable.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment shown in FIGS. 1 and 2, as an example of covering with a roof membrane, a stadium 7 having a substantially rectangular shape and a floor area of about 20,000 m ² is shown. On the outside of the stadium 7 in the longitudinal direction, four main towers 1 each having a substantially pyramid shape are erected. The material, height and position of the main tower 1 are determined according to the area of the stadium 7 and the purpose of use. Pulleys 6, 6'for guiding main cables 2, 2'to be described later are provided on the upper surface of the main tower 1. Since the pulleys 6 and 6'have concave grooves, the main cables 2 and 6 mounted on the pulleys 6 and 6'are
2'is retained without slipping out.

Two main cables 2 and 2'are stretched in parallel via pulleys 6 and 6 'so as to bridge the tops of the two main towers 1 facing each other in the longitudinal direction. . Since the main cables 2, 2'support the entire load of the membrane roof, the material and thickness of the main cables 2, 2'also depend on the size of the stadium 7, that is, the area of the roof membrane 5 described later. Will be decided.

The main cables 2, 2'between the two main towers 1 facing each other in the longitudinal direction are provided with a large number of side cables 3 which vertically cross these main cables 2, 2 '.
Are installed at equal intervals. The side cable 3 and the two main cables 2 and 2'are firmly connected by using a clamp, for example. The installation interval of the side cables 3 is adjusted to the center-to-center distance of the joints of the strip-shaped membrane pieces that form the roof membrane 5 described later.

As shown in FIG. 3, both ends of the side cable 3 are fixed together with the end of the roof membrane 5 by applying tension to the tower 9 provided on the spectator stand according to the number of the side cables 3. . However, if the outer wall of the stadium 7 has a height higher than that of the uppermost stand seat, it can be directly attached to the outer wall. As shown in FIG. 4, a plurality of hanger cables 4 are fixed to each of the side cables 3 by dividing the length of the side cable 3 at equal intervals using a hanging member 10, and The other end of the cable 4 is connected to the roof membrane 5. Since each of these hanger cables affects the maintenance of the roof membrane alignment, the length of the hanger cable 4 at each position is determined according to the desired design of the membrane roof.

The roof membrane 5 is made of a material which is not deteriorated by a natural environment such as ultraviolet rays and has a self-holding force even with a certain tension. In addition, it is almost impossible to use a large-area membrane as it is, and it is disadvantageous to construct it, and there are restrictions on transportation, so this roof membrane 5 is composed of several strip-shaped membranes. It is constructed by joining pieces. This seaming forms, for example, a large number of eyelets 13 in both edge regions in the longitudinal direction of the membrane piece,
Then, a rope 14 made of synthetic resin or the like is pierced through the eyelet 13 to connect adjacent membrane pieces. After connecting the membrane pieces, at this joint, a fixing plate provided with a lifting hook 12 for the purpose of facilitating the connection between the hanger cable 4 and the roof membrane 5 and strengthening the connection between the membrane pieces. 11 are provided according to the number of hanger cables 4. Since the fixing plate 11 is limited in weight and the like, it is made of a metal or synthetic resin which is light and hard to be deformed. The fixing plate 11 sandwiches the membrane pieces from above and below and is fixed by using bolts 21. Further, a cover sheet is welded to the seam of the membrane pieces for the purpose of stopping water. The welding work of the cover sheet is performed after all the tension adjusting works of the membrane structure roof are completed.

Further, each main cable 2, 2'stretched via pulleys 6, 6'on two main towers 1 opposite to each other.
Both ends of are constructed on the ground on the extension of the line connecting these two main towers 1 and are guided to an anchorage 15 equipped with a winding mechanism. This anchorage 15 is connected to the main cables 2, 2 '. Hold the required tension. In front of this anchorage 15, the roof membrane 5 connected to the main cables 2 and 2'is hung up, each main cable 2 and 2'is stretched under tension, and the maintenance and adjustment of this tension are also carried out. A linear winch 16 for performing the above is provided.

The linear winch 16 shown in FIG.
It is composed of two pulling members 19 and 20 having a gripper 18 having a hydraulic cylinder and a wedge 17, and the stretching operation of the main cables 2 and 2'by the linear winch 16 is performed as follows. That is, the main cable 2, which is guided in the linear winch 16,
2'to the wedge 17 of one of the retracting members 20 (main tower side)
Is inserted into the gripper 18 and the main cables 2, 2 '
Gripper, the cylinder of this gripper 18 makes a retracting movement, and the wedge 17 of the other retracting member 19 (on the side of the uncarrage) grasps the main cable 2, 2'and after one retracting member 20 is released. The cylinder of the gripper 18 of the other retraction member 19 performs retraction movement. By repeating this operation, the main cables 2 and 2'can be continuously pulled in.

The order of construction of the membrane structure roof in the above-described embodiment is as follows. First, four main towers 1 whose height and arrangement position are determined according to the purpose of use of the stadium 7 are erected outside the stadium 7. To do. In this case, the main tower 1 can be installed even when the stadium 7 is in use. Then, for example, using a crane or the like, a part of one main cable 2 is provided at the top of each main tower 1 so as to bridge the tops of the two main towers 1 facing each other in the longitudinal direction. Place on pulley 6. Here, the main cable between the main towers 1 is suspended above the ground, and both ends of the main cable 2 are on the ground on the extension of the line connecting the two main towers 1 via the linear winches 16. Guide to the built uncarage. By the same procedure, another main cable 2'is placed on each pulley 6'of the other two main towers, and both ends thereof are guided to the anchorage.

Next, a predetermined number of side cables 3 are laid vertically across the two main cables 2 and at equal intervals, and the intersections with the main cables 2 and 2'are clamped. Fix it. Then, each hanger cable 4 is connected to a predetermined position using the suspending member 10. Here, each main cable 2, 2'is stretched by the linear winch 16 to a position where all the hanger cables 4 are slightly lifted from the ground.

After that, the membrane pieces are spliced in the stadium,
And the fixing plate 11 provided with the hook 12 is attached to the predetermined seam position. Then, the hooks 12 of the fixing plate 11 and the corresponding hanger cables 4 are connected. After this connection work is completed, the two main cables 2 and 2'are pulled up from both sides to a predetermined height at the same time using the linear winches 16. At this time, the roof membrane 5 between the main cables 2 and 2'is suspended at a substantially predetermined position, but the other portions are still hanging downward. Therefore, the side cable 3 and both ends of the roof membrane are suspended. The part is fixed while applying tension to a support tower 9 provided on the outer wall of the stadium. After this, tension is again applied to the main cables 2 and 2'to balance the entire roof membrane 5. After all these operations are completed, a cover sheet is welded from above to each seam portion of the membrane piece to stop water.

[0015]

The present invention configured as described above does not require special provision of columns or the like, and most of the members can be manufactured at other places. It has an excellent advantage that the suspension period such as a stadium can be shortened and the construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a membrane roof according to the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is an enlarged view showing the connection between each cable and the roof membrane.

FIG. 5 is a cross-sectional view of a linear winch used in the present invention.

[Explanation of Codes] 1 Main Tower 2, 2'Main Cable 3 Side Cable 4 Hanger Cable 5 Roof Membrane 6,6 'Pulley 7 Stadium 8 Spectator Stand 9 Support Tower 10 Hanging Member 11 Fixed Plate 12 Hook 13 Eyelet 14 Rope 15 Anchorage 16 Linear winch 17 Wedge with cylinder 18 Gripper with cylinder 19,20 Retracting member 21 Bolt

Claims (2)

[Claims] 1. A method for constructing a large-scale membrane roof for a new or existing stadium, stadium, etc., wherein two or more main towers (1) are erected on the outer wall or outside of the stadium, etc. The main cable (2,2 ') is installed so as to bridge the two main towers (1), and the main cable (2,2') located between the main towers (1) is divided into a number of The side cables (3) are vertically connected to the main cables (2, 2 '), and a plurality of hanger cables (4) are arranged at predetermined positions of the respective side cables (3).
Of the side cable (3) and the roof membrane (5) by connecting one end of the main cable (2, 2 ') to the membrane roof (5) and then fixing the main cable (2, 2'). A method for constructing a membrane-structured roof characterized by applying tension to both ends to fix the roof. 2. Method according to claim 1, characterized in that a linear winch is used to tension the main cables (2, 2 ').