JPH0517964A - Waterproof construction method for underground wall structure - Google Patents

Abstract

PURPOSE:To improve a water stopping property by compounding a water guide system between a PC board and a water permeable member while attaining substantial labor saving with no necessity for withdrawal of a mold form by building a PC placing form of mounting the water permeable member, formed by coating a peripheral surface of a sheet material of corrugated sectional shape with a filter material as a core material in the reverse side, thereafter placing body concrete to construct an underground external wall, and using the PC placing form as an internal wall. CONSTITUTION:A water permeable member 20 is integrally formed in the reverse side of a PC board 18 to constitute a PC placing form 16. The PC placing form 16 is built in a position serving as an internal wall, and body concrete is placed to construct the PC placing form 16 as the internal wall and the placed body concrete as an underground external wall 22. A drain path 24 connected to a water collecting pit 12 is formed in a lower part of the water permeable member 20 interposed between the PC board 18 and the underground external wall 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing method for underground wall structures.

[0002]

2. Description of the Related Art Conventionally, as a method for waterproofing an underground wall structure, for example, there is a method shown in FIG. In this waterproofing method, a structure in which a water collecting pit 6 is provided in the deepest underground is constructed in advance, a skeleton outer wall 1 is built around the upper edge of the water collecting pit 6 in contact with the ground, and a waterproof mortar is formed inside the outer wall 1. And give 3
The hollow layer 7 is vacated to construct the concrete block wall 2 to form a double wall, and the groove 4 is formed in the lower portion of the hollow layer 7.
Further, a drainage channel 5 that connects the groove 4 and the water collecting pit 6 is formed.

The waterproofing effect of the obtained underground wall structure is as follows. That is, water that has entered the hollow layer 7 from the ground through the body outer wall 1 flows down the groove 4 along the inner surface of the outer wall 1, is discharged to the water collecting pit 6 through the drainage channel 5, and is further discharged from the water collecting pit 6 to the outside. Is released to.

[0004]

However, such a conventional waterproofing method has the following problems because the concrete block wall 2 is provided as an inner wall for forming the double wall.

That is, in order to construct the concrete block wall 2, it is necessary to stack a large number of blocks alone, which requires a great deal of labor and time, and the construction period is prolonged. Further, the construction of the concrete block wall 2 is a complicated work, and there is a problem in that the finish and waterproofness of the concrete block wall 2 are greatly affected by the skill level of the operator.

Another example of applying this type of waterproofing method is Japanese Patent Laid-Open No. 60-59234 (Int.Cl.E02).
D 31/02) and JP-A-62-233344 (Int.
Cl.E02D 31/02). These construction methods have the inner wall as a concrete wall in place of the concrete block, and the problem of stacking blocks alone can be solved, but to build this concrete wall,
Conventionally, it is necessary to build a formwork such as veneer or steel plate and place concrete in it, so a lot of planks and supports are used to reinforce the formwork. It is necessary to remove the formwork after curing the. For this reason, in order to complete the inner wall, in addition to building the formwork, a great amount of labor is required for removing the formwork and installing and removing the thick timber and supporting work. Similar to the waterproofing method shown, there was a problem that the construction period was significantly extended.

The present invention is to solve such a conventional problem, in which the peripheral surface of a corrugated sheet material as a core material is coated on the back surface of a PC (precast concrete) plate with a filter material. By using a PC driving form fitted with the formed water permeable member and using this PC driving form as the inner wall, water resistance of the underground wall structure can be improved while achieving significant labor saving. The purpose is to provide a construction method.

[0008]

In order to achieve such an object, the present invention provides a water permeable member formed by coating the peripheral surface of a sheet material having a corrugated cross section as a core material with a filter material. The PC driving form attached to the is molded, the PC driving form is built inside the outer wall of the underground to be constructed, and the outer wall of the underground is constructed by placing concrete on the outside of the PC driving form. At the same time, a drainage channel communicating with the water collecting pit is formed below the water permeable member.

[0009]

With the above construction, in the waterproofing method for the underground wall structure of the present invention, the water permeability is formed by covering the peripheral surface of the sheet material having a corrugated cross-section as the core material on the back side with the filter material. It is possible to build a PC driving form fitted with a member and construct a subterranean outer wall with concrete placed outside the PC driving form. At this time, the PC driving formwork becomes an inner wall with respect to the underground outer wall, and the underground outer wall and the inner wall form a double wall via the water permeable member. Therefore, the water that has entered through the outer wall of the underground can be blocked by the PC driving mold, and the blocked water is guided downward while permeating the water permeable member,
Then, the water is discharged to the water collecting pit through the drainage channel.

By the way, since the PC driving mold is used as the inner wall, it is not necessary to remove the PC driving mold after the construction of the inner wall is completed. Further, since the PC driving mold has high rigidity, a thick piece is not required when the PC driving mold is built. Therefore, since it is not necessary to remove the formwork and attach and detach the thick material, a great labor saving can be achieved.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 show an embodiment of a waterproofing method for an underground wall structure according to the present invention. FIG. 1 is a sectional view of a main part, and FIG. 2 is an enlarged sectional view of a main part A of FIG.

That is, in the waterproofing method for the underground wall structure of this embodiment, the underground portion 1 excavated for constructing the underground structure 1
At 0, a skeleton base 14 having water collecting pits 12 is constructed, and a PC driving form 16 is built in the peripheral edge of the upper surface of the skeleton base 14. At this time, this PC driving mold 16
Is built by providing a predetermined space between it and the inside of the underground portion 10. At this time, the PC driving mold 1
6 is fixed in a vertical state by using a supporting structure. The support work will be removed after the construction of the underground outer wall 22 described later is completed.

As shown in detail in FIG. 2, the PC driving mold 16 is formed on the back surface of the PC plate 18 by covering a peripheral surface of a corrugated sheet material as a core material with a filter material. The water-permeable member 20 is integrally lined. The water permeable member 20 is rich in water permeability in which both sides of a plastic sheet formed in a shape of continuous corrugated cross section is covered with a non-woven fabric, is lightweight, has high pressure resistance against concrete pouring pressure, etc. It is also an excellent material. This water permeable member 20 is used as the PC plate 18
As the backing, the PC plate 18 may be integrally formed by being driven at the time of molding, or various fixing methods such as sticking with an adhesive and nailing may be employed.

After the PC driving mold 16 has been built, a skeleton concrete is applied to the outside of the PC driving mold 16, that is, in the space between the PC driving mold 16 and the underground portion 10. The concrete is constructed as the underground outer wall 22 by pouring and hardening it.
In addition, when the underground outer wall 22 is constructed, the water permeable member 20 is sandwiched between the underground outer wall 22 and the PC plate 18.

A plurality of drainage channels 24, one end of which opens at the lower end of the water-permeable member 20 and the other end of which opens inside the water collecting pit 12, are formed at the upper peripheral edge of the skeleton base 14. is there. After the PC driving form 16 has been built, the lightweight concrete 26 that will become the floor surface is constructed.

According to the waterproofing method for the underground wall structure of the present embodiment having the above-mentioned structure, by constructing the frame concrete on the outside of the PC driving form 16 having the water permeable member 20 on the back side, The underground outer wall 22 can be easily constructed with cast concrete. Further, the PC driving formwork 16 is used as an inner wall with respect to the underground outer wall 22,
The underground outer wall 22 and the PC driving form 16 form a double wall with the water permeable member 20 interposed therebetween.

Therefore, when water enters from the underground outer wall 22, the water can be blocked by the PC driving form 16. The water blocked by the PC driving mold 16 permeates the water permeable member 20, and the water thus permeated into the water permeable member 20 travels through the water permeable member 20 and is gradually guided downward. . On the other hand, since the drainage channel 24 leading to the water collecting pit 12 is formed at the lower end of the water permeable member 20, the permeated water can be discharged to the water collecting pit 12 via the drainage channel 24. . Therefore, the PC plate 18 has excellent watertightness, and the water permeable member 2
In combination with 0 having excellent water permeability, the underground wall 22
The water-stopping property can be remarkably improved. Further, since the water permeable member 20 has a heat insulating property, this water permeable member 20 can form a heat insulating layer between the underground outer wall 22 and the PC plate 18 which is the inner wall, and the underground wall structure portion. It is possible to prevent dew condensation on the surface. Further, since the water-permeable member 20 has excellent pressure resistance, it is possible to prevent the PC driving form 16 from being broken even if the underground outer wall 22 is cracked.

By the way, since the PC driving mold 16 is used as the inner wall, the PC is not used after the inner wall is completely constructed.
It is not necessary to remove the driving form 16. Also, this PC
Since the driving form 16 is formed by hardening concrete into a plate shape, it has high rigidity. Even when the PC driving form 16 is to be built, the thick material that has been conventionally used is used. Unnecessary.

Therefore, by using the PC driving mold 16 as the inner wall of the underground outer wall 22, it is not necessary to remove the mold and attach and detach the thick timber, which has been conventionally performed, and it is possible to save a great amount of labor on site. Can be achieved.
Further, since the PC driving form 16 is manufactured in a batch in a factory or the like, it is possible to ensure the uniformity of the product and the smoothness of the surface finish, thereby increasing the skill level of the construction worker on the site in constructing the inner wall. Since it is not necessary so much and the surface finishing of the inner wall can be omitted, the present situation of labor shortage can be sufficiently dealt with.

[0020]

As described above, according to the waterproofing method for the underground wall structure of the present invention, the corrugated cross section is used as the core material on the back side of the PC driving form used for constructing the underground outer wall. Since a water-permeable member formed by covering the peripheral surface of the sheet material with a filter material was attached and this PC-casting formwork was constructed as an inner wall, there is no need to remove the formwork after completion of construction of this inner wall, and Since the surface finish of the inner wall is not required, it is possible to achieve a significant labor saving and a significant reduction in the construction period.

Further, since the PC driving form can ensure the uniformity of the product, it does not require a high level of skill of the construction worker on the site to construct the inner wall, and sufficiently copes with the current situation of labor shortage. You can

Furthermore, by combining a water-conducting system with a PC plate having excellent watertightness and a water-permeable member, various excellent effects can be obtained in that the water-stopping property of the underground outer wall can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an example of an underground wall structure constructed by using a waterproofing method according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a portion A in FIG.

FIG. 3 is a sectional view of a main part of an underground wall structure showing a conventional waterproofing method.

[Explanation of symbols]

 12 Water collecting pit 16 PC driving formwork 18 PC version 20 Water permeable member 22 Underground outer wall 24 Drainage channel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Etsunori Tamura 2-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (1)

Claim: What is claimed is: 1. A PC driving mold having a water-permeable member formed by covering the peripheral surface of a corrugated sheet material as a core material with a filter material on the back side thereof. Then, the PC driving form is built inside the outer wall of the underground to be constructed, and the outer wall of the underground is constructed by placing concrete on the outside of the PC driving form, and at the bottom of the water-permeable member. A waterproof construction method for underground wall structures, characterized by forming a drainage channel leading to a water collection pit.