JP2777225B2 - Concrete floor waterproofing method - Google Patents

Description

The present invention relates to a method of waterproofing a concrete floor.

[Problems to be Solved by the Related Art and the Invention] When constructing an underground structure such as a tunnel, when placing concrete on a ground surface, laying a waterproof sheet, then placing concrete, and further placing a concrete layer The surface is coated with a resin to prevent permeated water. However, current measures are not enough to prevent seepage water,
When the time elapses after the application, the resin coating layer peels off, rises, and requires rework.

[Means for solving the problem]

The present inventors have made intensive studies to solve the above-mentioned inconveniences, and as a result, completed the present invention.

That is, the waterproofing method of the concrete floor surface of the present invention, when waterproofing the concrete floor surface cast and formed on the groundwork, pierces the concrete layer to discharge water leakage, lays a wire mesh on the concrete floor surface, Fix with an anchor, apply a resin on this to form a coating layer containing a wire mesh, plug the remaining holes with waterproof rubber made of water-swellable rubber, and then inject the resin. And perform backfilling.

The concrete floor waterproofing method of the present invention basically includes the above four steps.

The first step of the present invention is to pierce the concrete layer to drain out permeated water, water leakage and accumulated water. It is preferable to provide two types of holes.

The first hole is intended to drain water that has already accumulated on the concrete floor, and the size of the hole is such that a submersible pump can be set, and the depth is about 100 to 150
It is preferably about mm. Set a submersible pump in this hole and drain the accumulated water as much as possible. In principle, the submersible pump is set during construction, and if water accumulates, it is driven to discharge water.

FIG. 1 shows a sectional view of the first hole. Here, 1 is a first hole, 2 is a submersible pump, and 3 is a water suction hole of the pump.

The second hole is provided in the part where the seepage water seeps out, the pitch is about 600 mm, the diameter is about 20 to 30 mm, the depth is about 50 mm
It is about a hole. A suction port of a vacuum pump is set in this hole, and the accumulated water is discharged. At this time, if the outflow of the effluent is intense, a general water stopping work such as injection of a chemical solution is performed to eliminate leakage due to permeation. In the area where the surface is not dried, the number of holes is increased, and the same waterproofing work is performed to dry the floor.

The vacuum pump is set in principle during construction, and if water accumulates, it is driven to discharge water. Since the drive of the vacuum pump is performed by filling an appropriate plug such as rubber into the hole, it is preferable that the side surface of the hole is slightly uneven.

A cross-sectional view of the second hole is shown in FIG. Here, 4 is the second hole, 5 is the suction port of the vacuum pump, 6 is the stopper, and 7 is the unevenness on the side surface of the hole.

As described above, permeate water by drilling holes in the concrete layer,
Drain water leaks and accumulated water and dry the concrete surface as much as possible.

The second step of the present invention is to lay a wire mesh on a concrete floor and fix it with an anchor.

As such a wire mesh, various types can be used, but a stainless steel wire mesh is preferable, and the fineness of the mesh is
Those having about 16 mesh can be preferably used. However,
The type of the wire mesh can be changed depending on construction conditions and the like, and the wire mesh may be installed so that the strength of the surface coating layer formed in the next step is sufficient for the seepage water from below.

The wire mesh is installed except for the holes drilled in the steps, and is firmly fixed to the concrete floor by driving in anchors.

The third step of the present invention is to apply a resin on the laid wire mesh to form a coating layer containing the wire mesh.
The coating film layer containing a wire mesh means that the wire mesh is contained inside the coating film layer, both surfaces of the wire mesh are coated with a resin, and the resins on both surfaces are integrated through the wire mesh.

As the resin to be applied, various resins can be selected depending on construction conditions and the purpose of construction, but a resin having flexibility and wet surface adhesiveness is preferable. Examples of such a resin include a flexible wet surface adhesive epoxy resin. Preferred examples of the flexible epoxy resin include Adeka Ultraflex E-110, E-1213, and F-1 manufactured by Asahi Denka Kogyo KK.

The above resin is covered except for the holes formed in the steps.

Since the formed coating film layer is solidified by including the wire mesh, it has sufficient strength against water pressure from below, and also prevents elongation and local or overall lifting.

The thickness of the coating layer varies depending on the construction purpose and construction conditions, but is usually about 2 to 5 mm.

 The fourth step of the present invention is the processing of the remaining holes.

In the second hole provided in the step, after the coating layer is solidified, the resin is injected and filled while fixing the wire netting by hitting an anchor.

If water is flowing out of the hole, it is preferable to plug the hole with water-stopping rubber and then inject and fill the resin while fixing the wire netting by hitting an anchor. As such a water-stop rubber stopper, a water-swellable rubber stopper is preferable, and for example, an Adeka Ultra Seal round bar manufactured by Asahi Denka Kogyo KK is preferably used. In addition, a baffle material such as rubber may be stuffed on it to reinforce it.

FIG. 3 shows a cross-sectional view of the hole subjected to the above-described processing, in the case where there is no outflow of water and in the case where there is water. Here, 4 'is a second hole having a water spout, 4 "is a second hole having no water spout, 8 is a waterproof rubber stopper, 9 is a baffle material, 10 is an anchor, 11 is a wire mesh, 12 Is a resin.

The resin used at this time is preferably the same as the resin used for coating. In this case, the resin layer is formed by digging into the inside of the concrete layer, and since this resin layer has good adhesiveness to the surface coating layer, it is effective in preventing peeling and floating.

The first hole provided in the step, remove the submersible pump,
Stopper with a stopcock. As the water stopper, a water stopper with a water-swellable water-stop rubber, for example, an Adeka stopper manufactured by Asahi Denka Kogyo KK is preferable. When this stopper is set at the bottom of the hole and the screw is tightened from above, the water-swellable waterproof rubber attached to the side of the stopper is pressed against the side wall of the hole to stop the water. As a result, even if a leak occurs, the water can be completely stopped by the water expansion of the water-swellable waterproof rubber.

After confirming that there is no water leakage, fill the hole in the same way as for the second hole. FIG. 4 is a cross-sectional view of the hole subjected to the above treatment, where 13 is a stopper and 14 is a water-swellable waterproof rubber.

When water accumulates on the floor due to water seepage from the wall, etc., as shown in FIG. 5, the water level (height of the portion where water permeates) 15 on the wall is about 100 mm above the water level. It is preferable to fix the wire mesh as described above and further form a wire mesh cored coating layer 16 to which a resin such as a flexible epoxy resin is applied.

〔The invention's effect〕

According to the concrete floor waterproofing method of the present invention, a coating layer containing a wire mesh is formed, and the resin coating layer is prevented from peeling and floating due to permeated water or the like. can get.

[Brief description of the drawings]

1 is a cross-sectional view of a first hole, FIG. 2 is a cross-sectional view of a second hole, FIG. 3 is a cross-sectional view of a second hole that has been backfilled,
FIG. 4 is a sectional view of the first hole subjected to the backfilling process, and FIG.
The figure is a sectional view showing a waterproofing method when there is permeated water from a wall surface. 1: 1st hole, 2: submersible pump 3: pump suction hole, 4: second hole 4 ': second hole with water source 4 ″: second hole without water source 5: Vacuum pump suction port 6: stopper, 7: irregularities on side of hole 8: waterproof rubber stopper, 9: baffle material 10: anchor, 11: wire mesh 12: resin, 13: stopper 14: water swellable waterproof rubber, 15: Water level 16: Wire mesh cored coating layer

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Satake 7-35, Higashiogu, Arakawa-ku, Tokyo Asahi Denka Kogyo Co., Ltd. (72) Inventor Takeshi Suzuki 7-35, Higashiogu, Arakawa-ku, Tokyo Asahi Denka Kogyo Co., Ltd. (72) Inventor Makio Takahashi 7-2-35 Higashiogu, Arakawa-ku, Tokyo Asahi Denka Kogyo Co., Ltd. (56) References JP-A-52-135508 (JP, A) (58) Surveyed field (Int.Cl. ⁶ , DB name) E21D 11/38 E02D 19/10 E02D 31/02

Claims (1)

(57) [Claims] 1. When waterproofing a concrete floor surface cast and formed on a foundation, water is discharged by piercing a hole in the concrete layer, a wire mesh is laid on the concrete floor surface, and this is fixed with an anchor. Applying a resin to form a coating layer containing a wire mesh, plugging the remaining holes with waterproof rubber made of water-swellable rubber, then injecting the resin and backfilling. A characteristic waterproofing method for concrete floors.