JPH06285839A - Manufacture of pontoon using foam molded product - Google Patents

Abstract

PURPOSE:To extend a life cycle of a pontoon by a method wherein standardization of materials and shortening of a manufacturing period of the pontoon are achieved by adopting a foam molded product as an inner form. CONSTITUTION:A form of a pontoon is manufactured on a bottom plate with an inner form 2 and an outer form 3 which are composed of foam molded product. Reinforcement, steelwork, precast concrete, and prestressed sheath are assembled in a space between an outer face 4 of the inner form 2 and the outer form 3, and conrete is poured thereinto. After curing the concrete, the outer form 3 is demolished and carried out, and the pontoon is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a float which is moored on water and used for docking and cargo handling of ships.

[0002]

2. Description of the Related Art In the prior art, a method of manufacturing a float using an outer mold and a inner mold both made of steel or wood is used.

[0003]

SUMMARY OF THE INVENTION In the conventional method for manufacturing a float, a float form is manufactured on a bottom slab by an outer mold and an inner mold both made of steel or wood. In the space sandwiched between the outer mold and the inner mold, rebar, steel frame, precast concrete, and prestressed sheath are assembled, concrete is poured, and after the concrete is hardened, the inner mold is dismantled and floated. Since it is carried out from the narrow opening located on the upper surface of the above, there is a problem in that assembling and disassembling the inner formwork requires cost and construction period.

The conventional float has a problem that after a long period of use, the skeleton of the float that is in contact with water has a very high risk of causing minute cracks and flooding.

It is an object of the present invention to provide an excellent method for manufacturing a float, which can reduce the cost required for assembling / disassembling the inner formwork and shorten the construction period.

The present invention is a method of manufacturing an excellent float, which has an action of preventing accidents such as water leakage and inundation of the float from minute cracks that may occur in the body of the float after long-term use. Is intended to provide.

[0007]

In order to achieve the above-mentioned object, the inner formwork 2 in the present invention is manufactured by previously enclosing a foaming agent inside a standard formwork in another factory. The foamed molded product taken out is used.

[0008] Plywood, roadbed, etc. are laid on a smooth and smooth base, and the bottom surface is set according to the plan. The bottom plate 1 is arranged on the basis of the bottom surface. The inner formwork 2 is loaded onto the bottom plate 1. The material of the outer mold 3 made of steel or wood is loaded. The outer form 3 and the inner form 2 are made into a floating form, and in the space sandwiched between the outer form 3 and the outer face 4 of the inner form 2, rebar, steel frame, precast concrete, prestress Assemble the sheath,
Concrete is poured and the concrete is hardened to produce a float.

Since the inner mold form 2 is left inside the float as it is even after the manufacture of the float is completed, the material of the foamed molded article forming the inner mold form: urethane or styrene fills the inside space. It has the function of preventing accidents such as floating water leaks and inundation.

The outer mold 3 is disassembled.

For large-scale floating, a plurality of outer molds 3
The inner formwork 2 is provided and manufactured.

If necessary, after the concrete constituting the float has hardened, a vaporization accelerator is injected into the inner mold 2 made of the foamed molded product to vaporize the foamed molded product, and the foamed molded product is obtained. The occupying portion can be hollowed out.

[0013]

EXAMPLE The example of FIG. 1 shows a completed state of a floating body.

The inner mold form 2 of the present invention is manufactured by enclosing a foaming agent in a standard mold form in another factory in advance and then taking out the foamed molded product.

[0015] Plywood, roadbed, etc. are laid on a flat and smooth base, and the bottom of the float is set according to the plan. Based on the bottom surface, the bottom plate 1 for floating, the outer wall 6, and the partition wall 7 are formed.
Place a steel frame / prestressed sheath tube. The inner formwork 2 is carried in and installed on the bottom plate 1. An outer formwork 3 made of steel is built on the bottom plate 1. Outer surface 3 of outer mold 3 and inner mold 2
The outer formwork 3 is assembled so that the outer wall 6 and the partition wall 7, which are the reinforcing bars, the steel frames, and the prestressed sheath tube, are arranged in the space sandwiched between the outer formwork 3 and the partition wall 7. Arrange the floating top plate 5. The concrete of the floating bottom slab 1, the outer wall 6, the partition wall 7, and the top slab 5 are simultaneously cast.

Since the inside 2 of the inner mold is left inside the float as it is even after the production of the float is completed, the material of the foam-molded article forming the inside 2 of the inner mold: urethane or styrene By filling the air, it has the function of preventing accidents such as water leakage and inundation of floating bodies.

The outer frame 3 constituting the float is disassembled. The concrete that forms the outer wall 6 and the top plate 5 appears.

The above is a description of the single outer mold 3 and the inner mold 2. In this embodiment, a plurality of outer molds 3 and inner molds 2 are used. When a plurality of outer molds 3 and inner molds 2 are used, it corresponds to repetitive work when a single outer mold 3 or inner mold 2 is used.

[0019]

Since the present invention is constructed as described above, it has the following effects. By adopting a foamed molded product for the inner mold to standardize the materials and shorten the production period for floating, it is possible to reduce the cost and the construction period.

The foam-molded article forming the inside of the inner mold is lightweight and suitable for the work to be easily moved by human power. Since the carry-in weight of the inner mold is greatly reduced, the cost and the construction period are reduced. It can be shortened.

By adopting a foamed molded product for the inner mold, it is possible to easily perform repetitive assembly work and demolding work, and it is possible to reduce the cost and the construction period.

The foamed molded article forming the inner surface of the inner mold form has an action of preventing accidents such as water leakage and infiltration of the floating body from minute cracks which may be generated in the body of the floating body due to long-term use. It has, and can extend the life cycle of floating.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a float.

FIG. 2 is a sectional view taken along line AA of FIG.

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

FIG. 4 is a perspective view of an inner mold form.

[Explanation of symbols]

 1 Floating bottom slab 2 Inner mold made of foamed molded product 3 Outer mold 4 Outer surface of inner mold 5 Floating top plate 6 Floating outer wall 7 Floating bulkhead

Claims (2)

[Claims] 1. A floating form is produced on an arranged bottom plate (1) by an inner mold (2) made of a foam molded product and an outer mold (3) made of steel or wood. Then, in the space sandwiched between the outer surface (4) of the inner formwork (2) and the outer formwork (3), rebar / steel frame / precast concrete and prestressed sheath are assembled, the concrete is poured, and the concrete is poured. A method for producing a float using a foam-molded article, in which the outer mold (3) is disassembled and carried out after curing to produce a float. 2. After the concrete constituting the float has hardened, a vaporization accelerator is injected into the inner mold (2) made of a foamed molded product to vaporize the foamed molded product, and the foamed molded product occupies it. The method for producing a float using a foam-molded article according to claim 1, wherein the portion is hollowed.