JP5419009B2 - Suspension member at the top of the flexible membrane body with a dome roof shape - Google Patents

Description

  The present invention relates to a dome that covers the upper part of a structure such as a storage tank for storing various storage items such as liquids such as water and petroleum, low-temperature liquefied gas, digestion gas, powder, and granular materials (hereinafter referred to as the dome in the present invention). The present invention relates to a suspension member for a zenith portion of a flexible film body having a dome roof shape in an air dome method for constructing a roof or the like (including various shapes such as a spherical surface, a curved surface, and a polyhedron).

An air dome construction method for constructing a dome roof covering the upper part of a structure such as a storage tank will be described with reference to FIG.
The storage tank 101 is formed of a flat bottom circular bottom plate 103, a cylindrical side wall 104 standing near the outer periphery of the bottom plate 103, and a blast-shell-shaped dome roof 102 covering the top of the side wall 104. The bottom plate 103, the side wall 104, and the dome roof 102 are formed by a concrete structure or a metal structure, or a combination of a concrete structure and a metal structure.
In order to construct the dome roof 102, the periphery of the flexible membrane body 105 covering the upper portion of the storage tank 101 is hermetically fixed to the upper end of the side wall 104, and the blower 106 is used to Air is introduced into the lower part to be tensioned, and a roof member such as mortar or concrete is applied to the upper part of the tensioned flexible film body 105. As the flexible film body 105, a flexible film material obtained by coating a fiber fabric with a resin material or the like is used.

  The invention relating to the air dome construction method for constructing the dome roof includes Japanese Patent No. 2913331 “Attachment and support method of flexible film body having dome roof shape and its work platform”. In this invention, a center frame higher than the side wall is provided at the center of the bottom plate of a structure body such as a storage tank composed of a bottom plate and a side wall, and a plurality of ropes are stretched radially from the base to the upper side of the side wall. The operator deploys the film body while supporting it, and the operator pulls the rope attached to the peripheral edge of the flexible film body so that the peripheral edge of the flexible film body is airtightly fixed to the upper part of the side wall.

In addition, the invention relating to the structure of the zenith portion of the flexible film body includes Japanese Patent No. 2939926 “zenith portion structure of air film”. The present invention relates to a zenith film piece formed in a blastomer shell shape by joining a zenith film piece formed in a circular shape and an annular film piece surrounding the zenith part, wherein the zenith film piece is It is formed by a zenith membrane formed by overlapping and sewing on an annular membrane piece, and a zenith membrane formed by overlapping and welding thereon.

Japanese Patent No. 2913331 Japanese Patent No. 2939926

  Patent No. 2913331 relating to the air dome construction method for constructing the dome roof described above “Invention of a method for mounting and supporting a flexible membrane body having a dome roof shape and its work platform” is provided at the center of the bottom plate of a structure body such as a storage tank. A radial rope that extends from the center frame to the top of the side wall is used to support the load of the flexible film body and spread it out to fix it to the top of the side wall with good workability. When the film body is lifted and deployed on the center frame, the load concentrates on the suspending portion of the zenith portion of the flexible film body, and there is a concern that the film body and the suspending portion near the zenith portion may be damaged. In addition, it is difficult to hold the film body from being twisted downward from the suspending portion of the zenith part, and labor is required to pull the peripheral edge of the flexible film body on average, and the flexible film body 105 is attached. It took a lot of work.

  In addition, the invention of the above-mentioned Japanese Patent No. 2939926 “zenith structure of air film” is a structure in which a flexible film body is lifted to the zenith structure of the air film formed by the subzenith film and the zenith film. The structure of the suspension part of the top part of the flexible film body for doing was not described at all.

The object of the present invention has been made in view of the problems of the conventional lifting structure as described above. When the flexible film body is lifted and moved, the zenith for fixing the hanging portion of the flexible film body is fixed. A suspension member for the top of the flexible membrane body with a dome roof shape in the air dome construction method that protects the cloth so as not to damage, lifts and moves with good workability, and properly installs the flexible membrane body It is.

The suspension member at the zenith portion of the flexible membrane body having a dome roof shape according to claim 1, wherein the flexible membrane body having a dome roof shape includes an annular ring-shaped membrane body having an outer ring shape and a planar circular zenith portion membrane body. The zenith membrane film is formed of two layers of a large-diameter zenith cloth upper membrane and a small-diameter zenith cloth underlayer, and each outer peripheral end portion is hermetically joined to the upper surface of the annular film body. The zenith cloth undercoat and the zenith cloth film are in a free state except that the cloth cloth is partially fixed to the extent that it does not hang down from the zenith cloth film. The present invention is characterized in that a hanging tape for lifting the entire flexible film body is attached and formed.

The suspension member at the top of the flexible membrane body having a dome roof shape according to claim 2, wherein both hem portions of the suspension tape are sewn to a suspension tape attachment cloth fixed to the upper surface of the top membrane of the top of the zenith, and the suspension tape The attachment cloth is attached to the same circumferentially symmetrical position on the upper surface of the zenith cloth upper membrane.

The suspension member at the top of the dome roof-shaped flexible membrane body according to claim 3,
The above-mentioned hanging tape is formed in an annular shape with a strip-shaped tab material, the middle of the lower part of the ring is sewn in a horizontal line shape, and the presser tape is superimposed on the remaining hems of this hanging tape, and the hanging tape mounting cloth is placed on top of it. It is formed by sewing.

  The suspension member at the zenith portion of the flexible membrane body having a dome roof shape according to claim 1, wherein the flexible membrane body having a dome roof shape includes an annular ring-shaped membrane body having an outer ring shape and a planar circular zenith portion membrane body. The zenith membrane film is formed of two layers of a large-diameter zenith cloth upper membrane and a small-diameter zenith cloth underlayer, and each outer peripheral end portion is hermetically joined to the upper surface of the annular film body. The zenith cloth undercoat and the zenith cloth film are in a free state except that the cloth cloth is partially fixed to the extent that it does not hang down from the zenith cloth film. Since the hanging tape for lifting the entire flexible membrane body is attached and formed, the flexible membrane body can be formed without damaging the zenith cloth and the suspended portion and without twisting the dome-shaped flexible membrane body below the zenith cloth. Easy to deploy by lifting on average, and install flexible membrane body properly with good workability Rukoto can. In addition, the zenith underlayer membrane is partially fixed to the extent that it does not hang down from the zenith cloth upper membrane. Even if the top membrane of the zenith cloth to which the hanging tape is fixed is accidentally damaged, the top of the flexible membrane body is covered and protected by the zenith undercoat.

  The suspension member at the top of the flexible membrane body having a dome roof shape according to claim 2, wherein both hem portions of the suspension tape are sewn to a suspension tape attachment cloth fixed to the upper surface of the top membrane of the top of the zenith, and the suspension tape Since the attachment cloth is attached to the same circumferentially symmetrical position on the upper surface of the above-mentioned zenith cloth film, the hanging tape can be properly and securely fixed to the attachment cloth, and this attachment cloth is closely attached to the zenith cloth film. And can protect the zenith intima without damaging it.

The suspension member at the zenith portion of the flexible membrane body having a dome roof shape according to claim 3 is formed by forming the suspension tape in an annular shape with a belt-like tab material, sewing the middle part of the lower portion of the ring in a horizontal line shape, and further Since the presser tape was layered on the remaining hems of the tape and sewed onto the hanging tape attachment cloth, the ring of the hanging tape would not spread and peel off. It can be firmly fixed and integrated by sewing with the hanging tape attachment cloth.

It is the whole side explanatory view showing the situation where the flexible membrane body hanging member of the dome roof shape concerning this invention is provided, and this flexible membrane body is lifted and developed using a crane. It is explanatory drawing which shows the suspension member of the top part of the flexible membrane body which carried out the dome roof shape concerning this invention. It is plane explanatory drawing which shows the installation condition of the suspension tape of the suspension member of a top | zenith part. It is side sectional explanatory drawing which shows the installation condition of the suspension tape of the suspension member of a top | zenith part. It is side surface explanatory drawing which shows the structural condition of a hanging tape. FIG. 6 is an explanatory plan view of the hanging tape of FIG. 5. It is an isometric view explanatory drawing which shows the structure condition of a hanging tape. It is side explanatory drawing explaining the air dome construction method which builds a dome roof.

  An embodiment of a membrane suspension member at the top of a flexible membrane having a dome roof shape according to the present invention will be described with reference to FIGS.

FIG. 1 is an explanatory side view illustrating a situation in which the flexible film body 5 is lifted by using the crane 9 and the pulling rope 10 provided at the peripheral edge of the flexible film body 5 is pulled and deployed.
A scaffold 7 is provided at a position along the outer periphery of the side wall 4 that constructs the dome roof 2 of the storage tank 1, and a center frame 8 is provided at the center of the storage tank 1. A plurality of supporting auxiliary wires 6 are stretched on the surface.
A film body suspending member 12 is provided near the top of the flexible film body 5. The hoisting rope 11 is suspended from the hoisting member 12, the flexible film body 5 is hoisted using the crane 9, and is moved above the center frame 8 provided at the center of the storage tank 1.

Each of the plurality of workers pulls the pulling rope 10 for deployment provided at the peripheral edge of the flexible membrane body 5 and develops the flexible membrane body 5 while supporting the flexible membrane body 5 with the radial auxiliary wires 6. 5 is fixed to the upper end of the side wall 4.
The flexible membrane body 5 lifted on the average can be deployed without being twisted downward from the zenith portion, and can be attached with good workability.

FIG. 2 is an explanatory view of the vicinity of the zenith portion showing a situation where the flexible film body 5 is lifted.
The membrane suspension member 12 is provided with a plurality of suspension tapes 13 arranged at symmetrical positions on the same circumference of the zenith membrane membrane 14 at the site indicated by a broken line in the figure, and the tip of the crane 9 is passed through the suspension rope 11 to the suspension tape 13. It is suspended on the hanging hook 9A.
The film body suspension member 12 for lifting the flexible film body 5 is formed by arranging a plurality of suspension tapes 13 along the same circumferential direction of the zenith part film body 14. It can be hung on the average, and the hung part near the zenith part film body 14 is not damaged.
Although not shown, by providing one or more pulling ropes on the lower peripheral edge of the flexible film body 5 for each hanging tape 13 disposed along the same circumferential direction of the zenith film body 14. The flexible film body 5 is hung on the average with the hanging tape 13 to load the load, and at the same time, the operator can unfold it so as not to be twisted by pulling it around with the pull-in rope.

FIG. 3 is an explanatory plan view showing the installation state of the suspension tape of the suspension member of the flexible membrane body.
The flexible film body 5 is formed by an annular ring-shaped film body 15 having a substantially fan-shaped film piece connected thereto and a planar circular zenith film body 14, and the same in the vicinity of the outer periphery of the zenith film film 14. At a symmetrical position along the circumferential direction, a plurality of suspension tapes 13 each having an annular band-shaped tab material are arranged symmetrically about the center point with the direction of the holes being aligned with the same circumferential direction.
In this way, the plurality of suspension tapes 13 are arranged in a ring and symmetrically arranged at the center point, and although not shown, the suspension tape 13 is lifted by adjusting the suspension length when the suspension tape is lifted through a continuous belt or rope. Thus, the flexible film body 5 can be lifted with a good balance on average.
The example of FIG. 3 shows the case where four suspension tapes 13 are arranged symmetrically at the center point on the top surface of the zenith membrane film 14, but the suspension tapes 13 are, for example, four up to 25 meters depending on the storage tank diameter. , 25 meters or more and less than 31 meters are 6 pieces, 31 meters or more and less than 35 meters are 8 pieces, 35 meters or more and less than 51 meters are 12 pieces, 51 meters and more are 20 pieces as a reference, and these plural pieces are symmetrical. Arrange. The basis for determining the number in this way is to apply a load of about 200 kilograms to each hanging tape 13. In consideration of safety, the strength per one hanging tape 13 and the strength of the mounting portion of the hanging tape 13 can support a minimum of about 1,600 kg.
Although not shown in the drawings, a flexible film body is formed by inserting a single lifting rope or the like into the hanging tape 13 and hooking the lifting rope at the intermediate position of the hanging tape 13 on the hanging hook at the tip of the crane. It is formed so that it is lifted with an average load.

FIG. 4 is an explanatory side sectional view showing the film body suspending member 12 provided in the vicinity of the zenith portion of the flexible film body 5.
The film suspension member 12 is formed of the zenith cloth upper film 14A, the suspension tape 13, and the like. The manufacturing procedure and manufacturing method of the film body suspending member 12 will be described below.
The planar circular zenith membrane film 14 is formed of a large-diameter zenith cloth upper film 14A and a small-diameter zenith cloth under film 14B, which are overlapped to form a substantially fan-shaped annular film film 15 and a planar circular zenith cloth film. The peripheral edge of 14B is integrally and airtightly welded at a portion indicated by X in the figure to form a flexible membrane body 5 having a dome roof shape.
Adhesion between the zenith cloth upper film 14A and the zenith cloth lower film 14B having the double membrane structure is such that the portion indicated by Z in the drawing is fixed by spot welding to such an extent that the zenith cloth 14B does not sag without being adhered to the entire surface.
The zenith cloth underlayer 14B and the annular film body 15 are covered with the zenith cloth upper film 14A provided with the hanging tape 13, and the peripheral annular portion indicated by Y in the figure is integrally welded.
A plurality of the hanging tapes 13 are attached to the upper surface of the zenith cloth upper film 14 </ b> A symmetrically in the same circumferential direction with W through the hanging tape attaching cloth 16. Thus, since attachment of members such as the hanging tape 13 is performed on the zenith cloth upper membrane 14A, the zenith cloth lower membrane 14B and the annular portion film body 15 constituting the dome roof membrane main body are not affected by the attachment process.
Further, since the zenith cloth upper membrane 14A and the zenith cloth lower membrane 14B are separated into two pieces without bonding the entire surface, the load of the suspension load is not directly transmitted to the zenith undercloth membrane 14B, and the above-mentioned annular portion film body 15 Since it receives in the large area of a cyclic | annular adhesion part, it does not affect the zenith part vicinity of a dome roof membrane main body, and does not produce a damage.

FIG. 5 is an explanatory side view showing how the hanging tape 13 is attached. FIG. 6 is an explanatory plan view of FIG. 5 viewed from above.
The hanging tape 13 is formed by annularly forming the center portion of the belt-like tab material in the middle of the lower portion and stitching them together at the stitching portion 18 in a horizontal line shape, and the remaining hanging tape both hem portions 13A and 13A of the hanging tape 13 are spread. Are placed on the hanging tape mounting cloth 16, and the presser tapes 17 and 17 are superimposed on the both skirts 13A and 13A of the hanging tape, and are sewn in parallel or in a zigzag manner at the stitching portions 19 and 19. Sew.
The substantially rectangular hanging tape attachment cloth 16 to which the hanging tape 13 is attached is fixed on the zenith cloth upper film 14A by W in FIG. 5. In the case of mechanical welding by high frequency, the range indicated by the oblique line W in FIG. That is, the outer periphery of the presser tape 17 at both ends is welded to the entire circumference with a width of about 40 to 50 millimeters, or the entire back surface of the hanging tape attachment cloth 16 is joined when hot air welding or an adhesive is used.
The material of the suspending tape 13 and the presser tape 17 is a material in which a synthetic resin fiber material having a strong tensile strength, for example, a high-density polyester resin fiber with suppressed elongation is woven so as to be able to withstand a large load during lifting work. Then, a member having a thickness of about 3 to 6 mm is used. The suspension tape 13 and the presser tape 17 made of such a thick fiber material cannot secure a necessary strength by bonding or welding to the suspension tape attachment cloth 16 or the zenith cloth upper film 14A. Sewing will be performed.
As the material of the hanging tape attachment cloth 16, for example, a member made of the same material as the zenith cloth upper film 14A having a thickness of about 1 to 2 millimeters is used. The hanging tape attachment cloth 16 made of such a material is bonded to the zenith cloth upper film 14A integrally with the same material by adhesion or welding, so that it is securely fixed to the zenith cloth upper film 14A with a necessary area in a wide area. Can do.

The hanging tape 13 is formed in a ring shape with a flat strip shape having a rectangular cross section or a string-like tape having a flat elliptical cross section, and the lower portion thereof is sewn in a horizontal line shape by a stitching portion 18. The hanging tape 13 is firmly fixed by being squeezed so that the annular portion does not spread and peel off. Further, since the presser tapes 17 and 17 are overlapped on the skirt portions 13A and 13A of the suspending tape 13 and are sewn to the suspending tape attaching cloth 16 by the sewing portions 19 and 19, the suspending tape 13 is detached. It will not peel off. Moreover, the substantially rectangular hanging tape attaching cloth 16 to which the hanging tape 13 is sewn is firmly fixed on the zenith cloth upper film 14A so as not to be peeled off in a large area.
The suspension tape 13 after the suspension work may be embedded in the mortar by fastening it with a reinforcing member to be constructed later. However, if it is not necessary, the suspension tape 13 is a fiber material and is sewn using a cutter or the like. The upper portion can be cut from the mating portion 18 and removed easily.

FIG. 7 is an explanatory perspective view showing a mounting state of the hanging tape 13 shown in FIGS. 5 and 6.
The hanging tape 13 has a band-shaped tab material formed in an annular shape, and a lifting rope 11 such as a rope or a band is inserted into the annular hole.
Since the load of the flexible film body due to the lifting of the lifting rope 11 is averagely distributed via the suspension tape 13 attached in the vicinity of the zenith portion, the zenith cloth and the lifting portion are not damaged.

This invention builds a dome roof that covers the top of various storage tanks and other structures that store liquids such as water and petroleum, low-temperature liquefied gas, digestion gas, powder, and granular materials by the air dome method. It can be applied to a wide range of lifting of the flexible film body.

1 Storage tank
2 Dome roof
3 Bottom plate
4 Side walls
5 Flexible membrane
6 Auxiliary wire
7 Scaffolding
8 Center stand
9 Crane
10 Pull-in rope
11 Lifting rope
12 Membrane suspension member
13 Hanging tape
13A Hanging tape both hem part 14 Zenith part membrane
14A Zenith cloth top membrane
14B Zenith cloth membrane
15 Annular membrane
16 Hanging tape attachment cloth
17 Presser tape
18 Sewing part
19 Sewing part

101 Storage tank
102 Dome roof
103 Bottom plate
104 Side wall
105 Flexible membrane
106 Blower

Claims (3)

A flexible membrane body having a dome roof shape is formed by an annular ring-shaped membrane body having an outer ring shape and a planar circular zenith membrane membrane, and the zenith membrane membrane has a large-diameter top membrane and a small-diameter under-zenith fabric. The top part of the annular part film body is hermetically joined to the upper surface of the annular part film body, and the zenith undercoat is partially fixed to the extent that it does not hang down from the zenith cloth top film. The dome roof is characterized in that the membrane and the zenith cloth upper film are in a free state, and a suspension tape for lifting the entire flexible film body is attached to the same circumferentially symmetrical position on the upper surface of the zenith cloth film. A suspension member at the zenith portion of the flexible film body having a shape. Both hem portions of the suspending tape are sewn on the suspending tape attachment cloth fixed to the upper surface of the zenith cloth overcoat, and the suspending tape attachment cloth is attached to the same circumferentially symmetrical position on the upper surface of the zenith cloth overcoat. The suspension member of the top part of the flexible film | membrane body of the dome roof shape of Claim 1 characterized by the above-mentioned. The above-mentioned hanging tape is formed in an annular shape with a belt-like tab material, the middle of the lower part of the ring is sewn in a horizontal line shape, and the presser tape is overlaid on the remaining hems of this hanging tape, and the hanging tape attachment cloth is placed on top of it. The suspension member of the top part of the dome roof-shaped flexible membrane body according to claim 1, wherein the suspension member is formed by sewing to a top.