JP2555295Y2 - Rust prevention structure of steel pipe pile - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rustproof structure for performing rustproofing on steel pipe piles that are cast in water and underground. 2. Description of the Related Art Conventionally, steel pipe piles are coated with various rust preventives and coatings on the surface thereof in order to prevent rusting due to water. [0003] However, the conventional one has a weak adhesion of a rust preventive or a coating agent, easily peels off from a steel pipe pile, and cannot achieve its original purpose. Was. Further, since the expansion of the metal and the coating agent with respect to the thermal change are different from each other, the coating agent is easily deteriorated and has poor durability. An object of the present invention is to provide a rust prevention structure for a steel pipe pile capable of solving the problems of the prior art. According to the present invention, a waterproof sheet formed by applying a lining material to a cloth cloth such as a cold gauze, drying and applying a waterproof paint on an outer surface thereof is provided on an outer surface of a steel pipe pile. A rust-proof structure of a steel pipe pile formed by bonding in a wound state through a bonding lining material, wherein the lining material and the bonding lining material of the waterproof sheet are mainly composed of carboxy-modified styrene and cyclohexyl methacrylate. And the same composition produced by mixing a main component mainly composed of silicon oxide, calcium oxide, and iron oxide, and the same as the main component of the composite polymer emulsion in the lining material of the waterproof sheet. A rust prevention structure for steel pipe piles, wherein the mixing ratio is higher than the mixing ratio of the two in the adhesive lining material. Pertaining to the structure. In the present invention, the mixing ratio of the composite polymer emulsion to the main agent in the lining material of the waterproof sheet is 1: 3.5, and the mixing ratio of the composite polymer emulsion to the main agent in the bonding lining material is 1: 4 to 6. It also has features. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings. In FIG. 1, reference numeral 1 denotes a waterproof sheet,
The waterproof sheet 1 preferably comprises a cloth fabric 2 such as a cold gauze, carboxy-modified styrene, cyclohexyl methacrylate, a composite polymer emulsion containing styrene as a main component, and a main agent containing silicon oxide, calcium oxide, and iron oxide as a main component. The lining material 3 produced by mixing at a mixing ratio of 1: 3.5 was applied and dried. In such a configuration, since both the cloth fabric 2 and the lining material 3 have a sufficient tensile strength, the two can effectively prevent the generation of cracks in cooperation with each other. The reason why the mixing ratio of the composite polymer emulsion and the main agent is 1: 3.5 is to impart sufficient extensibility to the waterproof sheet 1 and follow the thermal expansion of the steel pipe pile 6 described later. is there. [0010] Further, after the above-mentioned process, as shown in FIG. 2, the waterproof sheet 1 is preferably coated with a waterproof paint 4 preferably of a chlorinated rubber type on one surface thereof to completely waterproof. Can be. Further, since the paint 4 is rubber, the paint 4 can similarly cope with the thermal expansion of the steel pipe pile 6. Reference numeral 5 denotes an adhesive lining material applied to the other surface of the waterproof sheet 1;
Is manufactured by mixing a composite polymer emulsion mainly composed of carboxy-modified styrene and cyclohexyl methacrylate with a main ingredient mainly composed of silicon oxide, calcium oxide and iron oxide at a mixing ratio of preferably 1: 4 to 6. I do. Here, the compounding ratio of the composite polymer emulsion of the lining material 5 and the main agent is preferably 1: 4 to 6
The reason for this is to maximize the adhesive strength to the steel pipe pile 6. After this step, the waterproof sheet 1 is wound around and bonded to the outer surface of the steel pipe pile 6 via the bonding lining material 5, as shown in FIG. During the winding, the waterproof sheet 1 is fastened with a belt or the like until the waterproof sheet 1 is completely bonded to the steel pipe pile 6. The joining edges of the waterproof sheet 1 are connected by an underwater curing type adhesive 7. In the above construction, the waterproof sheet 1 and the adhesive lining material 5 use a composite polymer emulsion having the same composition.
For example, it can be one disclosed in Japanese Patent Application No. 5733499 and has the following component constitution. [0017] The base material used for the waterproof sheet 1 and the adhesive lining material 5 has the following composition. [0018] The waterproof sheet and the lining material composed of the composite polymer emulsion and the base material have excellent physical and chemical properties, and particularly, due to their adhesive strength and tensile strength, the thermal expansion of the steel pipe pile can be sufficiently absorbed,
Cracking of the waterproof sheet can be reliably prevented, and the waterproof sheet can be strongly adhered to the steel pipe pile, thereby completely preventing peeling. Further, since the waterproof sheet is coated with a chlorinated rubber-based paint on its outer surface, complete waterproofing can be achieved. Further, since the lining material forming the waterproof sheet and the lining material for bonding are made of the same material,
The waterproof sheet and the lining material for adhesion are well compatible, and the waterproof sheet can be firmly bonded to the steel pipe pile, and peeling of the waterproof sheet can be reliably prevented. The waterproof sheet can sufficiently follow the thermal expansion of the steel pipe pile by combining a coarse hard and extremely thin cotton cloth or linen with a cold gauze which is a lining material containing a composite polymer emulsion. Cracks can be effectively prevented. [0022] Since the waterproof sheet is further wound around the steel pipe pile by a lining material containing a composite polymer emulsion, the adhesive strength to the steel pipe pile can be significantly increased. Since the outer surface of the waterproof sheet is coated with a chlorinated rubber-based paint, a high waterproof effect can be obtained. Since the lining material forming the waterproof sheet and the adhesive lining material are made of the same material, the waterproof sheet and the adhesive lining material are well compatible, and the waterproof sheet can be firmly bonded to the steel pipe pile. In addition, peeling of the waterproof sheet can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a waterproof sheet used for rust prevention of a steel pipe pile according to the present invention. FIG. 2 is a cross-sectional view of the waterproof sheet in a state where a waterproof paint and a lining material are applied to both sides, respectively. FIG. 3 is an explanatory diagram showing a state where the waterproof sheet is attached to a steel pipe pile. [Description of Signs] 1: Waterproof sheet 2: Cloth cloth 3: Lining material 4: Waterproof paint 5: Adhesive lining material 6: Steel pipe pile 7: Adhesive

Claims (1)

(57) [Rules for requesting registration of utility model] Apply lining material to cloth cloth such as cold gauze,
Waterproof made by drying and applying waterproof paint on the outer surface
The sheet is attached to the outer surface of the steel pipe pile via an adhesive lining material.
Rust prevention structure of steel pipe piles bonded and wound
Te, lining material and adhesive liner of the waterproof sheet
Is a carboxy-modified styrene, a composite polymer emulsion mainly composed of cyclohexyl methacrylate, silicon oxide, calcium oxide, the same composition manufactured by mixing a main ingredient mainly composed of iron oxide , and Waterproof
Polymer emulsion in sheet lining material
Of the main agent in the adhesive lining material
A rust prevention structure for steel pipe piles, characterized in that the mixing ratio is higher than the mixing ratio of the two . 2. Composite polymer in the lining material of the waterproof sheet
-The mixing ratio of the emulsion to the main ingredient is 1: 3.5
As well as composite polymers in adhesive lining materials
The mixing ratio of the emulsion to the main ingredient is 1: 4 to 6
The rust prevention structure of a steel pipe pile according to claim 1, wherein: