JPS60141929A - Leakage protecting construction method for embedded-in- concrete object - Google Patents

Abstract

PURPOSE:To absorb a moisture content, entering along a round separator, and to prevent leakage of water to a lasement room, by a method wherein a hydrous swelling agent is applied on a cut-off material, which is divided so that it is detachable to the round separator, or a hydrous swelling material is mounted thereto, and is embedded in concrete. CONSTITUTION:A hydrous swelling agent 9 is applied on cut-off materials 7 and 8, respectively divided or partially cut, which are attached to the outside of a embedded-in-concrete object, such as separators 5, H-steels 6, or a hydrous swelling material 10 is mounted thereto. The disc-shaped cut-off disc 7 is divided into 2 parts, the one being a main partition body 11 and the other being an auxiliary partition body 12, the one sides are joined together by means of a support body 13, and the other sides can be freely engaged with each other. The hydrous swelling agent 9, in which fibrous pieces are mixed in high water absorbing resin, is applied on a round separating cut-off material 5. This enables absorption of a moisture content entering along the round separator 5, driven in concrete, prevention of leakage of water, and elongation of useful life for the concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a separator for assembling formwork, which is penetrated or buried in concrete, in concrete constructions.
The purpose is to prevent water from leaking through pipes, H-beams, tie rods, etc.

Conventionally, construction methods for preventing water leakage from buried concrete include:
As shown in Figure 1, concrete forms for underground structures, water treatment plants, sewage treatment plants, etc.1. In order to prevent water from leaking through the separator = 2 that penetrates the hardened concrete wall,
Although a disc-shaped round separator water stop plate 4 was inserted, the water stop effect was not perfect due to the following reasons.

In other words, formwork fasteners 3 are provided at both ends of the separator 2 to tightly connect the formworks 1 and 1', but the threaded portions into which the formwork fasteners 3 are screwed are threaded screws. The outer diameter A of
In addition to being larger in diameter than the outer diameter B of the non-threaded portion, the inner diameter C of the round separator water stop plate 4 must be in close contact with the outer diameter B of the non-threaded portion of the separator 2, otherwise water will be transmitted and leak. .

Therefore, in order to insert the round separator water stop plate 4 into the separator 2, it is necessary to pass through the outer diameter A of the rolled thread at the end, but the inner diameter C of the round separator water stop plate 4 must be the smallest diameter. Next is the outer diameter B of the non-threaded portion of the separator 2, which is successively larger than the outer diameter A of the rolled threaded portion.

That is, the relationship is A>B>C.

Since the above conditions are necessary, the material of the round separator water stop plate 4 is a hard material, which cannot be inserted by enlarging the inner diameter C of the round separator water stop plate 4 manually. It is necessary to use a soft material of rubber or synthetic resin that can be inserted by enlarging the inner diameter C of the separator water stop plate 4.

However, since the round sepa water stop plate 4 is made of soft material, it is weak and
When pouring fresh concrete, depending on the flow of fresh concrete, separator 2
Although it was inserted at right angles to the separator 2, it may be tilted, and there may be a gap with the outer diameter B of the non-threaded part of the separator 2.
Water leaks often occurred in locations where the water pressure was strong due to poor adhesion.

In addition, in order to insert the round separator water stop plate 4 into the separator lake 2, a force to enlarge the inner diameter C is required which is stronger than the repulsive force due to the elasticity of the soft material, and this work is performed by a male professional technician. Another drawback was that it was difficult to work with, as it was inserted by middle-aged and elderly female workers with low wages.

The present invention not only solves the above-mentioned problems and drawbacks, but can also be easily installed even by amateurs without relying on specialized technicians, and can be installed without the danger of welding during rain or the need to manage release paper. Easy process management □ now contributes to lowering the total cost.

The content of the present invention will be explained in detail with reference to the drawings below. Water stop materials 7 and 8 are attached to the outside of concrete buried objects such as separators 5 and type W46 by dividing or partially incising.
This is a construction method for preventing water leakage of concrete buried objects, which is carried out by applying a water-containing swelling material 9 or attaching a water-containing swelling material 10 to the non-threaded part of the separator 5, as shown in FIG. The inner diameter of the disc-shaped water stop plate 7 is equal to or slightly smaller than the outer diameter of the disc-shaped water stop plate 7, and the disc shape is divided into two to form a semi-disc-shaped main division body 11 and a sub-division body 12, The joint between the main divided body 11 and the sub divided body 12 is used as a support part 13, the end of the main divided body 11 is made into a claw part 14 so that a part of each part can be locked in a disc shape, and the end of the sub divided body 12 is made into a claw part 14. the engaging part 15
A round sepa water stop material 7 is constructed.

In order to fit the round separator water stop material 7 to the separator 5, the claw part 14 and the engaging part 15 are separated as shown in FIG. Since the engaging portion 15 is engaged and fixed, the round separator water stop material 7 does not need to be inserted through the outer diameter F of the rolled screw at the end of the separator 5, and can be attached to the outside of the non-threaded portion of the separator. Now it can be fitted closely to the diameter.

It is strong because it can use hard material instead of soft material like the conventional round separator water stop plate 4, and it can maintain a right angle with the separator 5 when pouring fresh concrete, so it does not cause gaps. Therefore, water leakage through the separator 5 can be prevented.

In addition, a water-containing swelling material 9 made of super absorbent resin and mixed with fiber strips, urethane foam strips, etc. in a solvent may be applied to a part or all of Maru Separa Waterstop vJ7, or the water-containing swelling material 9 is impregnated into a non-woven fabric, felt, cotton, urethane foam material, etc., and then the dried water-containing expandable material io is attached to the inside, outer periphery, or side of the round separator water stop material 7, and the separator 5 is It absorbs the transmitted moisture and becomes a water-containing swelling material 9
Alternatively, the water-containing expandable material 10 increases its volume to form a swollen water-stopping film and a swelling water-stopping material, filling a slight gap between the hardened concrete and the round separator water-stopping material 7, and causing water to leak through the separator 5. can now be completely prevented.

In addition, if the thickness of the concrete wall is large, the water-stopping effect will be more complete if the round separator water-stopping material 7 is installed at two or more places on the penetrating separator 5. Apply directly to separator 5,
Alternatively, the same water-stopping effect can be obtained even when the water-stopping material 7 is installed, so the cost of the round-separated water-stopping material 7 and its installation can be reduced.

According to the present invention, since the construction method is such that water is stopped at the leakage inlet, it is possible to prevent the occurrence of rust on the iron separator 5, and it is also possible to prevent the cracking of the hardened concrete IJ due to the expansion of iron rust. As a result, it can also be expected to have the effect of extending the lifespan of concrete structures.

Also, when using a connecting nut in the middle of the separator 5, applying water-containing swelling material 9 to the threaded portion before screwing will prevent water from leaking through the gap between the threaded portions. Not only is this prevented, but when water is supplied after applying the water-containing swelling material 9 and screwing it together, the water-containing swelling material 9 increases in volume and fills the gap between the screws, absorbing sound and vibrations. This function prevents the threaded part from loosening due to vibrations, etc.

The above-mentioned slow-acting hydro-swelling material 10 and fast-acting hydro-swelling material 9
When applied, a synergistic effect can be obtained due to the combination of fast-acting and slow-acting water stopping effects.

In addition, when crimped synthetic fibers are used as the base material of the hydrous expandable material 10, the expansion and contraction ratio is high, so it can be used for parts where the outer diameter expands and the inner diameter decreases, such as at bent parts of flexible pipes. The water-stopping effect and vibration-proofing/sound-proofing effect can be obtained by following the same method.

In addition, carbon fiber, glass fiber,
By using strong materials such as aramid fibers, they can withstand high water pressure and can now be used to waterproof structures in the deep sea.

Next, in concrete structures, H-beam steel, square or round steel pipes, etc. are often used as structural materials, but when penetrating the floor slabs of each underground layer from the foundation of underground construction to the ground level. In order to prevent water from leaking through concrete, steel plates are welded to the outer peripheries of shaped steel, square and round steel pipes to prevent water from leaking through them. A construction method to stop water by detouring the route.

Many construction methods are used to seal water by gluing non-vulcanized butyl rubber, but with the steel plate welding method, there may be gaps between the steel plate and concrete when the fresh concrete is placed.
It was difficult to achieve a complete water-stopping effect, and it took a lot of time to weld the entire circumference of the H-section steel to form a slightly long protrusion with no gaps in the shape of a brim.

In addition, in the method of bonding unvulcanized butyl rubber to 11-shaped steel, etc., the adhesive compounded in the unvulcanized butyl rubber adheres through a chemical reaction when the fresh concrete hardens, and the unvulcanized butyl rubber If one surface of the product is not covered with non-adhesive release paper from production to just before use, the non-vulcanized butyl rubber will stick to itself or to other products, making it impossible to use it.

In addition, if this method is carefully maintained at the site to ensure that the release paper does not come off after adhering to H-shaped steel, etc., right before pouring fresh concrete, the adhesive strength with hardened concrete will decrease and cause water leakage. .

In the present invention, as shown in FIG. 5, the H-beam 6 is integrally attached to the H-beam 6 using an external fixing device.

In this case as well, it goes without saying that if the water-containing swelling material 9 and the water-containing swelling material 10 are used in accordance with the water-stopping purpose, the water-stopping effect will be more complete.

FIG. 6 shows an embodiment using a round steel pipe 18, in which a water stop material 19 divided into ribs is arranged along the outer periphery of the round steel pipe 18 and integrated with a fixing device 20. The method of constructing water leakage prevention for concrete buried objects according to the present invention is not only easy to install even by amateurs without relying on specialized technicians, but also can be installed by welding iron plates or non-vulcanized butyl rubber even in the case of H-shaped steel or round steel pipes. This has the advantage that even an amateur can easily install it without the need for adhesives or the like.

Additionally, there is no danger of welding during rain or the need to manage release paper, and since construction is simple, process control is easy and can contribute to reducing total costs.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of an example using the conventional water leakage prevention construction method (/'C). Figure 2 is a sectional view of the same round separator water stop plate as above. Figure 3 is a round separator water stop material used in the present invention. A vertical cross-sectional view showing a state in which the water-stopping material is installed. Fig. 4 is a diagram showing a divided state of the round sepa water-stopping material used in the present invention. Fig. 5 is a longitudinal cross-sectional view showing a state in which the water-stopping material is installed on an H-shaped steel. Figure 6 is a vertical cross-sectional view showing a round steel pipe with a water stopper attached. Plate 5: Separator 6: ■] Shape steel 7: Round separator Water stop material 8: Water stop material 9: Water-containing swelling material 10: Water-containing swelling material 11: Main dividing body 12: Sub-dividing body 13: Supporting part. 14: Claw part 15: Engagement part 16: Non-threaded part 17: Fixing tool 18: Round steel pipe 19: Water stop material 20: Fastening tool A: Outer diameter of threaded part B: Outer diameter of non-threaded part C: Round separator water stopper Inner diameter of the plate D = Outer diameter of the non-threaded part E: Diameter of the rod disc-shaped water stop plate F: Outer diameter of the rolled screw Patent applicant: Yata Kuju Shimamoto, representative of Arao Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] (11) A water-containing swelling material is applied to a water-containing material that is installed by dividing or cutting a part of the outside of a concrete buried object such as a separator or H-shaped steel, or A construction method for preventing water leakage of concrete buried objects, which is characterized in that it is carried out by attaching it to a concrete buried structure. (2) It is characterized by dividing a disc-shaped water stop into two parts to form a divided body, and attaching it to a round separator, round steel pipe, etc. A construction method for preventing water leakage of concrete buried objects as set forth in claim 1. (3) Water-stopping water-containing swelling material made of a super absorbent resin as a base material and mixed with fiber pieces, urethane foam pieces, etc. with a solvent. A method for constructing water leakage prevention for buried concrete according to claim 1, characterized in that the water leakage prevention construction method for concrete buried objects is coated on the material. Water-containing swelling materials such as non-woven fabrics, felts,
Water leakage from concrete buried objects according to claim 1, characterized in that a water-containing expanded body is used which is obtained by impregnating cotton, urethane foam, carbon fiber, nitrous fiber, aramid fiber, etc. and then drying it. Prevention construction method.