JPH061511U - H-shaped steel waterproof structural material - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents peeling from the H-section steel to reduce the water stoppage, facilitates construction, and prevents differences in water stoppage depending on the skill level. [Structure] A water-swellable rubber material 3 is formed in a substantially H-shape so as to cover the entire outer surface of the H-section steel 2 in accordance with the shape of the H-section steel 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water blocking structural material for H-section steel, and more specifically, it does not peel off from the H-section steel to reduce the water blocking property, is easy to install, and has a difference in water blocking property depending on the skill level. The present invention relates to a water-blocking structural material for H-section steel that does not have the risk of

[0002]

[Prior art]

 Although H-section steel is used in many fields as a construction structural material, a water-stopping method that also prevents water leakage through the H-section steel and corrosion of the H-section steel has been a conventional problem. It was.

That is, H-section steel is generally used as a core material for pillars of civil engineering and construction structures, and concrete is placed around the H-section steel. When cracks or junk occur, or when voids form between H-section steel and concrete, groundwater penetrates the H-section steel and enters the inside of the structure, and the H-section steel itself rusts. However, the waterproofing method that effectively prevents these problems has been a conventional problem.

As a water-stopping method for the above H-section steel, a method is conventionally known in which a butyl string is attached to the surface of the H-section steel. Further, as proposed by the present applicant in Japanese Utility Model Publication No. 61-125426, there is also known a construction method using a water-stop structure in which a moisture-curable water-swellable paste-like polyurethane resin is applied to the surface of H-section steel. ing.

[0005]

[Problems to be solved by the device]

 However, in the former method of pasting a butyl string on the H-section steel, a long waterproof material made of the butyl string is pasted on the surface of the H section steel, so it is easy to peel off at corners, etc. In the case of peeling, the water blocking material hangs down from the surface of the H-section steel due to its own weight, there is a risk that the water blocking property will not be restored and the water blocking property will decrease.

In the latter method of applying the moisture-curable water-swellable paste-like polyurethane resin to the surface of the H-shaped steel, the water-swellable water-stopping material exhibits excellent water-stopping effect, but exhibits the water-stopping effect. It takes about one day to cure, it is difficult to apply in a narrow space, it takes time to apply it, and it is difficult to apply it in a certain shape. There were problems such as the occurrence.

The object of the present invention is to prevent the water-stopping property from being peeled off from the H-section steel, to facilitate the construction, and to prevent a difference in the water-stopping property depending on the skill level. It is to provide wood.

[0008]

[Means for Solving the Problems]

 The present invention is characterized in that a water-swellable rubber material is formed into a substantially H-shape in accordance with the shape of the H-section steel so as to cover the entire outer surface of the H-section steel. It provides structural materials.

Here, it is preferable that a wire mesh that suppresses expansion in the lengthwise direction is incorporated inside the water-swellable rubber material. Further, it is preferable that a U-shaped metal fitting made of spring steel is internally provided in a portion of the water-swellable rubber material that covers the corner portion of the H-shaped steel.

[0010]

[Action]

 According to the H-shaped steel waterproof structure of the present invention, the water-swellable rubber material is formed into a substantially H-shape so as to cover the entire outer surface of the H-shaped steel. Therefore, it can be easily installed on site and there is no risk of it hanging from the H-section steel and peeling off.

[0011]

【Example】

 Embodiments of the H-shaped steel waterproof structure of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of a water blocking structural material of H-section steel according to the present invention, and FIG. 2 is a sectional view showing a second embodiment of a water blocking structural material of H-section steel according to the present invention. 3 is a perspective view showing a metal fitting used in the second embodiment, FIG. 4 is a perspective view showing another embodiment of the metal fitting, and FIG. 5 is a water blocking structural material of the first embodiment shown in FIG. 6 is a cross-sectional view showing a case where two cut portions are provided in FIG. 6, FIG. 6 is a cross-sectional view showing a case where two cut portions are provided in the water blocking structural material of the second embodiment shown in FIG. 2, and FIG. 1 is an enlarged cross-sectional view of the cut portion of the water blocking structural material of the first embodiment shown in FIG. 1, B of FIG. 7 is an enlarged cross-sectional view showing another embodiment of the cut portion, and C of FIG. It is an expanded sectional view showing other examples.

First, referring to FIG. 1, a first embodiment of the water blocking structural material for H-section steel of the present invention will be described. The water blocking structural material 1 comprises a water-swellable rubber material 3 and an H-shaped steel 2 It is formed in a substantially H-shape in advance so as to cover the entire outer surface of the H-shaped steel 2. The water-swellable rubber material 3 is internally provided with a wire net 4 for suppressing undesired expansion in the lengthwise direction, and the water-swellable rubber material 3 is provided with an appropriate portion (H-shaped steel 2 A cutting portion 6 is provided at a position corresponding to the central position of the horizontal portion of the.

Here, the H-shape may be formed by one constituent member made of the water-swellable rubber material 3, but it may be formed by a plurality of constituent members made of the water-swellable rubber material 3. Preferably. This is because when it is formed of a plurality of constituent members, it can be mounted on the H-section steel 2 more easily than when it is formed of one constituent member. The width of the water-swellable rubber material 3 (the dimension of the portion along the length direction of the H-shaped steel 2) is preferably set to 10 mm to 30 mm.

Further, as the wire net 4, it is possible to use various metal nets including ordinary stainless nets. The wire mesh 4 can be installed vertically or parallel to the wall surface of the H-section steel 2, but in FIG. 1, the wire mesh 4 is perpendicular to the wall surface of the H-section steel 2 (to the wall surface). The interior is shown (as vertical). Moreover, it is preferable that the wire mesh 4 is installed along the entire wall surface of the H-shaped steel 2 except for the corner portions.

Examples of the water-swellable rubber forming the water-swellable rubber material 3 include water-swellable polyurethane resins, starch / acrylic acid graft copolymers, and well-known highly water-absorbing materials such as polyacrylic acid sodium bridges. Examples thereof include a mixture of a water-soluble polymer and a natural rubber, a synthetic rubber, a reclaimed rubber, or the like. Among these, a water-swellable polyurethane resin-containing flexible substance is preferable.

Such a water-swellable polyurethane resin-containing flexible substance is a urethane prepolymer containing a terminal isocyanate group obtained from one or a mixture of two or more polyether polyols represented by the following chemical formula 1 and polyisocyanate. And a cross-linking material can be obtained by kneading and curing with the above rubbers.

[0018]

[Chemical 1]

Examples of the polyhydric alcohol include dihydric alcohols (ethylene glycol, propylene glycol, etc.), trihydric alcohols (glycerin, trimethylolpropan, etc.), tetrahydric alcohols (erythritol, pentaerythritol, etc.), pentavalent alcohols. Alcohol (arabit, xylit, etc.), hexahydric alcohol (sorbit, mannitol, etc.), etc.

The above polyether polyol can be produced by adding alkylene oxide to such a polyhydric alcohol so as to have a desired molecular weight. Such addition may be random or block. When the proportion of oxyethylene groups is 20% or less, the swelling property becomes insufficient, which is not so preferable as a water blocking material. Any polyisocyanate can be used. The isocyanate group present at the terminal of the urethane prepolymer is 1 to 12%, more preferably 2 to 7%.

As the above-mentioned cross-linking agent, polyol having 2 to 6 active hydrogens per molecule and having an average molecular weight of 30 to 15000 per active hydrogen, polyamine (low molecular weight polyol, addition of low molecular weight polyol and alkylene oxide). Polymers, low molecular weight polyamines, addition polymers of low molecular weight polyamines and alkylene oxides), or mixtures of the above compounds can be used.

In the above-mentioned flexible substance, it is preferable to mix 20 to 800 parts of water-swelling polyurethane resin with 100 parts of rubbers.

Other preferable flexible substances include those obtained by further mixing a hydraulic substance with the composition comprising the water-swellable polyurethane resin and rubbers. Examples of hydraulic materials that can be used include Portland cement, blast furnace cement, colloidal cement, gypsum, etc. Preferably, this is used together with a calcium aluminate cement quick-setting agent. Such a flexible substance containing a hydraulic substance has an advantage that shrinkage is small even when dried. The compounding amount of the hydraulic substance is preferably 20 to 300 parts of the hydraulic substance based on 100 parts of the total amount of the water-swellable polyurethane resin and rubbers.

In addition, a suitable water-absorbing substance can be added to the flexible substance. Examples of the water-absorbing substance include a carboxyl group, a carboxylate, a carboxylic acid imide, a carboxylic acid amide, a carboxylic acid anhydride, and the like, or a group having at least one carboxyl group in the molecule, which can be converted into a carboxyl group. Examples thereof include those containing a β-unsaturated compound as a main component and optionally other α, β-unsaturated compounds and polymerized, or those obtained by further modifying these with isocyanates.

Examples of such a water-absorbent resin include starch / acrylic acid graft copolymers, salts of styrene-maleic anhydride copolymers, cross-linked products of sodium polyacrylic acid, vinyl esters / ethylenically unsaturated carboxylic acids. Alternatively, a known superabsorbent polymer such as a saponified product of a derivative thereof can be used.

Further, the flexible material can be vulcanized using a crosslinking agent such as sulfur.

In addition, the above-mentioned flexible substance is preferably mixed in such a manner that the water swelling ratio of the obtained molded product is 10 to 350%, and more preferably 40% to 250%.

It is preferable to apply a primer to the water blocking structure material 1 in advance. If the primer is applied, the expansion speed of the waterproof structure 1 can be controlled even at the construction site where the construction period is long and dew condensation occurs. As such a primer, water-based urethane, rubber-based adhesive or the like is used.

According to the water blocking structural material 1 of the H-section steel of the present embodiment configured as described above, it is possible to prevent groundwater from passing through the H-section steel 2 and entering the inside of the structure. It is possible to prevent the shaped steel 2 itself from rusting.

That is, since the water-stopping structural material 1 of this embodiment is formed by forming the water-swellable rubber material 3 into a substantially H-shape according to the cross-sectional shape of the H-shaped steel 2, Unlike bending and adhering the structural material along the H-section steel 2 or applying putty, it is easy to attach to the corners of the H-section steel 2 which is difficult to construct, and uneven work due to skill level occurs. Absent. Therefore, the waterproofness is improved. Further, since the water-swellable rubber material 3 is used, its rubber elasticity prevents the material from hanging even if it is peeled off from the H-section steel 2.

In addition, since the wire net 4 is provided inside the water-swellable rubber material 3, the water-swellable rubber is used even in the case where the construction period is long and the environment is highly humid such that dew condensation is caused. It has the effect of suppressing the expansion of the material 3 in the length direction and increasing the expansion in the thickness direction, and there is no trouble such as meandering or peeling of the water-swelling rubber material 3, and a more water-stopping effect is exhibited.

Next, referring to FIG. 2, a second embodiment of the H-shaped steel waterproof structure of the present invention will be described. In FIG. 2, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 2, the water blocking structural material 10 of the second embodiment is such that the end of the H-shaped steel 2 is formed at a portion of the water-swellable rubber material 3 that covers the corner portion of the H-shaped steel 2. A U-shaped metal fitting 5 made of spring steel is internally provided so as to be engaged with the portion, but in other respects, the construction is substantially the same as that of the water blocking structural member 1 shown in FIG.

Here, the metal fitting 5 is preferably installed inside the water-swellable rubber material 3 in a state substantially parallel to the H-shaped steel 2 at a substantially central position in the thickness direction of the water-swellable rubber material 3. Further, the metal fitting 5 may be formed by simply bending spring steel into a U-shape as shown in FIG. 3, but if an appropriate shaped hole 5a is further formed as shown in FIG. The water swelling rubber material 3 on the front side of the metal fitting 5 and the water swelling rubber material 3 on the back side communicate with each other through the hole 5a, and the same effect as the wire net 4 shown in FIG. Will have the effect of suppressing the unwanted expansion of the. The width of the metal fitting 5 (the dimension of the portion along the length direction of the H-shaped steel 2) is preferably set to 5 mm to 25 mm. In this case, it is preferable to set the width of the water-swellable rubber material 3 (the dimension of the portion along the length direction of the H-section steel 2) to 10 mm to 30 mm.

According to the water blocking structural material 10 of the second embodiment configured as described above, in addition to exhibiting the same effect as the water blocking structural material 1 of the first embodiment described above, the metal fitting 5 causes the H The joint between the shaped steel 2 and the waterproof structure 10 becomes easy and strong. Further, since the cut portion 6 is provided, the waterproof structure material 10 can be attached to the surface of the H-section steel 2 by using an adhesive or a pressure-sensitive adhesive, and can be peeled off from the H-section steel 2. Instead, it can be installed almost completely.

As shown in FIG. 5 or 6, the cutting portion 6 is provided at a position corresponding to the central height position of the right and left vertical portions of the H-shaped steel 2 of the water blocking structural material 10. Good. That is, the water blocking structural member 1 or 10 may be divided into two constituent members, that is, the upper portion of FIG. 5 or FIG. 6 and the lower portion of FIG. It may be formed of two constituent members made of the swellable rubber material 3). The cut section 6 may be formed by vertically cutting the water blocking structural material 1 or 10 as shown in A of FIG. 7, but as shown in B of FIG. It is preferable to form it by cutting it in the form of a tenon, or as shown in FIG. 7C, to form a tenon, that is, one of the cut surfaces is a tenon (projection) and the other cut section is a groove. . In particular, if the cutting portion 6 is shaped like a tenon, the water blocking structural member 1 or 10 is mounted on the surface of the H-shaped steel 2 without any gap in the cutting portion 6 even if there is some deviation. be able to.

The H-shaped steel water-stop structural material of the present invention is mainly for preventing groundwater and the like from entering the voids formed between the H-shaped steel and the concrete that is cast around it and solidified. Used by mounting on H-shaped steel.

[0038]

[Effect of device]

 As described above, the water blocking structural material of the present invention does not peel off the water blocking material to reduce the water blocking property, is easy to install, and does not cause a difference in water blocking property depending on the skill level.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of an H-shaped steel waterproof structure according to the present invention.

FIG. 2 is a cross-sectional view showing a second embodiment of the H-shaped steel waterproof structure of the present invention.

FIG. 3 is a perspective view showing a metal fitting used in the second embodiment.

FIG. 4 is a perspective view showing another embodiment of the metal fitting.

5 is a cross-sectional view showing a case where two cut portions are provided in the water blocking structural material of the first embodiment shown in FIG.

FIG. 6 is a cross-sectional view showing a case where two cut portions are provided in the water blocking structural material of the second embodiment shown in FIG.

7A is an enlarged cross-sectional view of a cut portion of the water blocking structural material of the second embodiment shown in FIG. 2, and FIG. 7B is an enlarged cross-sectional view showing another embodiment of the cut portion. FIG. 7C is an enlarged cross-sectional view showing still another embodiment of the same cut portion.

[Explanation of symbols]

 1, 10 H-shaped steel waterproof structural material 2 H-shaped steel 3 Water-swellable rubber material 4 Wire mesh 5 U-shaped metal fitting 5a Hole 6 Cut part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soumitsu Mizuno 7-6, Eizashi-cho, Tennoji-ku, Osaka City, Osaka Prefecture Osaka Waterproof Construction Co., Ltd. Asahi Denka Kogyo Co., Ltd. (72) Inventor Isamu Izuka 7-35 Higashiohisa, Arakawa-ku, Tokyo Asahi Denka Kogyo Co., Ltd. (72) Inventor Akemi Terao 7-2-5 Higashiohisa, Arakawa-ku, Tokyo No. Asahi Denka Kogyo Co., Ltd. (72) Koji Hara 7-35 Higashiohisa, Arakawa-ku, Tokyo Tokyo Asahi Denka Kogyo Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A stop for H-shaped steel, characterized in that a water-swellable rubber material is formed into a substantially H-shape in accordance with the shape of the H-shaped steel so as to cover the entire outer surface of the H-shaped steel. Water structure material. 2. The waterproof structural material for H-section steel according to claim 1, wherein the H-shape is formed by one component made of the water-swellable rubber material. 3. The water blocking structural material for H-section steel according to claim 1, wherein the H-shape is formed of a plurality of constituent materials made of the water-swellable rubber material. 4. The water stop of H-section steel according to claim 1, wherein the water-swellable rubber material is internally provided with a wire mesh which suppresses expansion in the lengthwise direction. Structural material. 5. A U-shaped metal fitting made of spring steel is provided inside a portion of the water-swellable rubber material that covers the corner portion of the H-shaped steel. H described
Shaped steel waterproof structural material.