JP2901045B2 - Spring drainage method and waterproofing unit inside the building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring drainage method and a waterproofing unit inside a building, and more particularly to a spring generated inside a building which will be located underground after completion, such as a basement of a building. The present invention relates to a drainage method for draining water and a waterproof unit that can be effectively used in the method.

[0002]

2. Description of the Related Art It is impossible to prevent underground water from flowing out through a foundation concrete or a concrete on a side wall of a building which is to be located underground after completion such as a basement of a building. I ca n’t,
Usually, a special drainage work is performed to drain the water that has gushing out.

According to the conventional spring drainage method, a space for collecting water is formed between the basement floor and the foundation concrete, and a drainage layer filled with pebbles or gravel is provided therein, and the collecting space is formed there. The spring water drained was drained. However, in this method, clogging is likely to occur and drainage becomes difficult in some cases. In order to avoid the above-mentioned disadvantages of the conventional spring drainage method, the present inventors have developed a synthetic resin foam in which a concave portion communicating with the side surface is formed on the base concrete cast as a foundation of a basement. We have already proposed a drainage method for basement rooms in which waterproof units consisting of plate-like bodies are placed side by side so that the respective recesses of adjacent waterproof units communicate with each other, and concrete is poured from above. (Japanese Patent Publication No. 63-16537).

[0004] The above method will be described with reference to FIGS. 4 to 6. FIG. 4 shows an embodiment of a waterproofing unit 9 used in carrying out the above method, which is made of expanded polystyrene or other synthetic resin. It is molded with a foam.
The waterproof unit 9 is a plate-like body having a planar shape in which four corners of a square are cut off at right angles, and a plurality of square grooves 9a having a rectangular cross section extending from one end to the other end are provided on the bottom surface thereof. By providing them in parallel, a concave portion communicating with the side surface is formed, and a reinforcing groove 9b is formed in a grid pattern on the upper surface. When the waterproof units 9 are sequentially arranged, the square grooves 9a and the reinforcing-arrangement grooves 9b of the adjacent waterproof units communicate with each other.

FIG. 5 is a vertical cross-sectional view of the basement 3 after the construction in the case where the waterproofing unit 9 is used for drainage of the basement 3 whose top and bottom are partitioned by the first floor 1 and the basement floor 2. This will be described with reference to FIG. 6 which is a sectional view. First, the waterproof units 9 are sequentially arranged and placed above the foundation concrete 4 cast as the foundation of the basement 3. In this state, as described above, the respective square grooves 9a and the reinforcing groove 9b of the adjacent waterproof units 9 communicate with each other, and the cut portions of the four adjacent waterproof units 9 are integrated. Thus, a square hole-shaped void is formed (see also FIG. 6). Next, the above-described groove 9 for reinforcing bars is used.
After arranging the reinforcing bar 10 in b, concrete is poured from above to form the basement floor 2. As a result, the concrete flows into the above-mentioned square-hole-shaped space, and the projection 21 of the basement floor 2 is formed and connected to the foundation concrete 4, so that the waterproof units 9 can be positioned and fixed more reliably. By this construction, the drainage passage is formed vertically and horizontally between the waterproof unit 9 and the foundation concrete 4, so that the spring water is collected in the drainage ditch (not shown) through the drainage passage and discharged out of the building by the pump. You.

When the drainage work of the basement 3 is performed in this manner, a continuous drainage passage is formed by the concave groove formed in the waterproof unit, and therefore, pebbles, gravel and the like are interposed between the basement floor 2 and the foundation concrete 4. Clogging, etc., which is likely to occur when a drainage layer filled with water is formed, does not make drainage difficult, and furthermore, the waterproof unit 9
Is made of synthetic resin foam, so it has the effect of heat insulation and vibration proof. In addition, the drainage work can be done only by placing the waterproof units 9 side by side and placing concrete from above. There is an advantage that is.

[0007]

The present applicant has implemented many of the above drainage methods, and found that there are some points to be improved there. One is that the waterproof unit to be molded is not necessarily flat on all four side parts for the sake of molding, and it is inevitable that fine irregularities occur on molding. Furthermore, when many waterproof units are placed on the foundation concrete, the foundation concrete surface to be placed is often not a flat horizontal surface. Gaps and deviations are likely to occur in
When the concrete is poured from the upper surface, there is a possibility that the concrete may enter from the part and block the drain passage formed.

[0008] In the case where actual processing is performed on the side surface of the waterproof unit and the waterproof units are joined together by actual engagement, the inconvenience can be avoided to some extent, but it is difficult to form a waterproof unit having an actual groove. In addition to the high cost, the work of laying multiple waterproof units while actually engaging on the foundation concrete surface requires carefulness such as checking the direction and is not necessarily a practical solution. .

[0009] For this purpose, in actual drainage work, a waterproof unit having no actual groove on the side surface is used, and the unit is laid on the foundation concrete. A) is applied to all of the parts (indicated by A) to form a so-called seam, thereby preventing concrete from entering through the gap between the waterproof units. However, when the construction area is small, the work of applying the adhesive tape (sealing work) does not bring much difficulty, but when the construction area is large, the amount of work is large, Accurate bonding along the joint line of comrades requires careful work, and it is a work to be avoided if possible as a field work.

In addition, it is actually difficult to expect that all of a large number of waterproof units are accurately arranged on a foundation concrete in a close contact state, and the shape of the construction surface at the construction site is difficult. Is not always an accurate rectangle, it is rare that the reinforcing groove 9b formed on the upper surface is completely connected to each of the adjacent waterproof units 9 rarely. Since it is difficult to pass through the streaks, in actual construction, it is almost always necessary to install reinforcing bars on the waterproof unit after the waterproof unit 9 is arranged, irrespective of the reinforcing groove 9b.

The present invention has the disadvantages of the proposed spring water drainage method inside a building using a waterproofing unit made of a synthetic resin foam plate having a concave portion communicating with the side surface on the bottom surface, which has already been proposed as described above. More specifically, by eliminating the work of covering the joint surface with adhesive tape after laying the waterproof unit on the foundation concrete, construction that facilitates on-site work It is to obtain a spring water drainage method and a waterproof unit inside a product.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention relates to a drainage method for spring water inside a building, the method comprising: A waterproof unit in which a synthetic resin sheet is stuck on at least two adjacent sides of a synthetic resin foam plate having a concave portion communicating with a side surface on the bottom surface is formed on the concrete. Each of the waterproof units is placed side by side so that the recesses communicate with each other, and the synthetic resin sheet covers the side surfaces of adjacent waterproof units that contact each other from above, and concrete is poured from above. Disclosed is a method of draining spring water inside a building, characterized by the following.

[0013] The present invention also provides a waterproof unit which can be used particularly effectively in the above-described spring drainage method.
The whole is molded from a synthetic resin foam plate, the bottom surface of which is formed with a concave portion communicating with the side surface, and the top surface of which is attached with a synthetic resin sheet extending at least from two adjacent sides. A waterproof unit made of a plate-like body is also disclosed.

[0014]

[Operation] In the method for draining spring water inside a building according to the present invention, when the waterproof unit is placed on the foundation concrete of the building, the joining line portion on the side of the adjacent waterproof unit is connected to the waterproof unit. They are sequentially arranged so as to be covered from above by a synthetic resin sheet attached to the upper surface. Thereby, when a large number of waterproof units are placed on the foundation concrete, even if a gap or a gap occurs between the joined side surfaces of the waterproof unit, the gap or the gap is shifted from the top by the synthetic resin sheet. It will be in a completely covered state. Therefore, it is possible to reliably prevent the concrete poured in from the gap from entering without performing the work of attaching the adhesive tape to the joining line portion. Thereby, the on-site work can be simplified.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a waterproofing unit according to the present invention. The waterproofing unit 50 has a flat plate-like body 50b formed of a foam made of expanded polystyrene or another synthetic resin.
And a synthetic resin sheet 51 bonded to the upper surface thereof. The plate-like body 50b has a rectangular groove 50a having a rectangular cross section extending from one end to the other end provided on the bottom surface thereof in parallel with the side surface by a plurality of rows in the same manner as the waterproof unit 9 used in the spring water drainage method in the above-described conventional example. As a result, a concave portion communicating with the side surface is formed.

In this embodiment, the upper surface of the plate-like body 50b is a flat surface, on which a synthetic resin sheet 51 having an area larger than the surface area of the plate-like body 50b has two adjacent sides L _1. They are joined in a state of extending a part from L _2. The synthetic resin sheet 51 only needs to have a property of not being damaged by the concrete poured thereon and having the property of not allowing the uncured concrete to permeate.
Synthetic resin sheets such as polypropylene and polyester are preferable, and polyethylene is particularly preferable from the viewpoint of cost. The thickness may be about 50 μm to 300 μm, and about 150 μm is practical.

The means for joining the synthetic resin sheet 51 to the foam body is optional, but joining with an adhesive resin coating or heat fusion with a hot roll is effective.
This joining process is performed in the manufacturing factory of the waterproof unit 51. Next, a method of draining spring water using the waterproof unit 50 will be described. First, the waterproof unit 5 having the synthetic resin sheet 51 bonded to the upper surface as described above.
Zeros are carried to the construction site. The carried-in waterproof units 50 are sequentially arranged on a foundation concrete cast as a foundation in a basement or the like as in the conventional construction method. However, in the case of this embodiment,
It is a very desirable construction method to arrange the two adjacent sides of each waterproof unit 50 so that the synthetic resin sheet 51 extends in the same direction. At that time, the waterproof unit 50 to be placed next is placed on the side L ₃ (L ₄ ) of the waterproof unit 50 that has already been placed on the foundation concrete, on the side L ₃ (L ₄ ) where the synthetic resin sheet 51 does not extend. It is a more preferable embodiment that the synthetic resin sheet 51 is arranged so that the side L ₁ (L ₂ ) extending from the synthetic resin sheet 51 is in contact with the synthetic resin sheet 51. By doing so, it is possible to easily arrange all the waterproof units 50 in a state in which the synthetic resin sheet 51 covers the adjacent side surfaces of the adjacent waterproof units from above.

This state will be described with reference to FIG. FIG. 2 shows a case where nine waterproof units 50 are arranged on the foundation concrete as an example. By arranging each waterproof unit 50 in the order of the number given to the figure as an example, easily and reliably. It will be understood that the adjacent side surfaces of the adjacent waterproof units can be covered by the synthetic resin sheet 51 from above.

After arranging the required number of waterproof units 50 on the foundation concrete, reinforcing bars are arranged in the same manner as in the conventional construction method, and concrete is poured from above to form a basement floor. Accordingly, since the drainage passage is formed vertically and horizontally between the waterproof unit 50 and the foundation concrete, spring water is collected in a drainage ditch (not shown) through the drainage passage and easily discharged to the outside of the building by the pump. be able to.

In the spring drainage method according to the present invention, the adjacent side surfaces of the adjacent waterproofing units are integrally joined to the waterproofing units simultaneously with the arrangement of the waterproofing units on the foundation concrete. It is covered from above by a synthetic resin sheet. As a result, it is possible to completely prevent the situation where the cast concrete enters from the joint portion and blocks the drain passage, and the seaming work with the adhesive tape after the laying of the waterproof unit conventionally performed at the construction site can be omitted. .

The above description is only a description of an embodiment of the method of spring water drainage inside a building and a waterproofing unit according to the present invention, and there are many other variations. For example, in the waterproof unit 50 shown in FIG. 1, the plate 50b and the synthetic resin sheet 51 have similar shapes, and the plate 50
The upper surface of b is entirely covered with a synthetic resin sheet 51, and this is not an essential configuration, even if it is a preferable embodiment from the viewpoint of moisture resistance.
The initial purpose can be achieved if the synthetic resin sheets are joined while extending from one side. FIG. 3 shows one embodiment of the present invention. In this embodiment, the synthetic resin sheet 52 is joined in an L-shape in plan view such that a part thereof extends from the plate-like body 50b. In this case, the amount of the synthetic resin sheet used can be reduced, and the cost is reduced.

Of course, the synthetic resin sheet is a plate-like body 50b.
May extend from three or four sides. In that case, it is possible to arrange on the foundation concrete without considering the directionality, and the construction is further facilitated, but on the other hand, the use amount of the synthetic resin sheet increases and the cost rises. Further, the shape of the concave portion formed on the back surface of the plate-like body 50b is merely an example, and the point is that any shape is possible as long as the concave portions of the adjacent waterproof units communicate with each other. All of the shapes described in JP-B-63-16537 can be effectively used. Further, a reinforcing groove may be formed on the upper surface of the plate-like body 50b as described in JP-B-63-16537, and the synthetic resin film 51 may be bonded thereon. Is deformed in the synthetic resin film 51 by the insertion of the reinforcing bars into the grooves for reinforcing bars, but it will be understood that this does not hinder the achievement of the object.

[0023]

As described above, when the waterproofing unit according to the present invention is used to perform spring water drainage work inside a building, it is not necessary to apply adhesive tape or the like to the joint surface of the waterproofing unit. Therefore, in addition to the effects of the conventional construction method such as not requiring a large space for drainage, and having excellent effects of heat insulation and vibration isolation, the work process can be further simplified. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a waterproof unit according to the present invention.

FIG. 2 is a view showing a state in which a waterproof unit according to the present invention is arranged.

FIG. 3 is a perspective view showing another embodiment of the waterproof unit according to the present invention.

FIG. 4 is a perspective view showing a conventional example of a waterproof unit.

FIG. 5 is a cross-sectional view showing a state after a spring drainage operation inside a building using a waterproof unit.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

[Explanation of symbols]

50: waterproof unit, 50b: plate, 51: synthetic resin sheet

Claims (2)

(57) [Claims] 1. A drainage method for spring water inside a building, comprising: a synthetic resin foam plate-like body having a concave portion communicating with a side surface formed on a base concrete cast as a foundation of the building. A waterproof unit having a synthetic resin sheet adhered to the upper surface at least extending from two adjacent sides thereof, such that the concave portions of the adjacent waterproof units communicate with each other, and the synthetic resin sheets are adjacent to each other. A method of draining spring water from inside a building, wherein the waterproof units are placed side by side so as to cover adjacent side surfaces of the waterproof unit from above, and concrete is poured from above. 2. A synthetic resin sheet is adhered in a state of being formed entirely of a synthetic resin foam plate, having a bottom surface formed with a concave portion communicating with a side surface, and having an upper surface extending from at least two adjacent sides thereof. A waterproofing unit for use in a spring drainage method inside a building, which is characterized in that it is used.