JPH06108488A - Underground external wall and its construction - Google Patents

Abstract

PURPOSE:To provide an underground external wall having a sufficient water- proof effect and easy construction. CONSTITUTION:An underground external wall is provided with a concrete wall 11 supported by the frames 20 of the underground external wall body 10 and formed by them. The frames 20 form the internal faces of the underground external wall body 10 by the unified body with the concrete wall as frames to place concrete. The frame for concrete has hollow spaces in the inside and water-permeable grooves 21a are formed on the face of concrete wall 11 side of the frames for concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground wall and its installation method, and more particularly to an underground wall and its installation method in which a formwork can be used as a finishing surface of an inner wall surface.

[0002]

2. Description of the Related Art When constructing a reinforced concrete underground outer wall in an underground part where underground water is expected to invade, groundwater penetrates to the inner surface (indoor side) of this underground outer wall and stains the inner surface. Appropriate waterproofing and decorative walls are required to be created or lime deposits from the outer wall of the underground and the inner surface of the outer wall of the underground is soiled.

Conventionally, such a waterproofed underground outer wall body has been constructed by the following method. For example, a concrete form is installed, and concrete is placed in this form which has been reinforced. Next, after the concrete is hardened to form a concrete wall, the formwork is removed, and 20 to 30
A block wall as a decorative wall is provided with a space of cm.

In this way, the double wall structure of the concrete wall and the block wall has prevented groundwater and the like from entering the inside.

[0005]

However, in order to make a double wall structure of a concrete wall and a block wall, after the concrete wall is formed, the formwork used for forming the concrete wall must be removed. I have to.

Further, in order to construct the block wall on the inner surface of the concrete wall, it is necessary to carry in and out the material such as the block. In particular, when forming the outer wall of the basement, the work of removing these forms, the work of loading and unloading materials such as blocks, and the work of forming the block wall must be carried out underground, and efficient construction must be performed. There was a problem that it was difficult.

The present invention has been made in order to solve the above problems, and an object thereof is to provide an underground outer wall body having a sufficient waterproof effect and easy to construct, and a construction method thereof. .

[0008]

In order to achieve the above object, the underground outer wall body of the present invention comprises a concrete wall supported and formed by a formwork of the underground outer wall body, and the formwork is a driving formwork. As an integral part of the concrete wall to form the inner side surface of the underground outer wall, the driving formwork has a hollow portion inside, and a water-permeable groove is formed on the concrete wall side surface of the driving formwork. In addition, the surface of the water permeable groove is covered with a water permeable non-woven fabric.

Further, the concrete wall is formed by being supported by the formwork of the underground outer wall body, and the formwork forms an inner surface of the underground outer wall body integrally with the concrete wall as a driving formwork. The driving formwork has a hollow part inside,
A slit groove is formed on the concrete wall side surface of the driving form, and a water-permeable groove communicating with the slit groove is provided.

Further, in the method for constructing an underground wall of the present invention, a hollow portion is formed in at least one of the molds for forming the concrete wall, and a slit groove is formed on the concrete wall side surface of the one mold. Form a water-permeable groove that communicates with this slit groove and form a concrete wall by placing concrete in the formwork, and use one of the formwork as a driving formwork to form an inner surface of the concrete wall. It is configured to be integrated with.

In the above-mentioned method for constructing an underground wall of the present invention, the slit groove forming surface may be covered with a water-permeable nonwoven fabric.

[0012]

According to the underground outer wall of the present invention, a water-permeable groove is formed on the concrete wall side of the driving form, and the water-permeable groove forming surface of the driving form is covered with a water-permeable nonwoven fabric. Since it is said that groundwater etc. that has invaded through the concrete wall is guided to the permeable nonwoven fabric and drained to the permeable groove,
It is prevented that the inner surface of the underground wall is reached.

Since the hollow portion is formed inside the outer wall of the underground, the strength as a plate material in the groove direction is high, the reinforcement which is conventionally performed with steel pipes and the like is not necessary, and the weight of the outer wall is reduced. It becomes possible to improve workability.

Further, by forming a narrow slit groove on the concrete wall side surface of the casting form and providing a water-permeable groove communicating with this slit groove, concrete can be provided in the water-permeable groove without providing a non-woven fabric. Only water drains down without clogging.

Further, according to the method for constructing the underground outer wall body of the present invention, the formwork for forming the concrete wall is not removed but left as it is as a casting formwork to form the inner surface of the underground outer wall body. Therefore, the smooth surface of the mold can be finished as it is, and the work of forming the block wall as in the conventional case is not required, so that the work efficiency can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a transverse cross-sectional view of an underground outer wall body according to the present invention, FIG. 2 is a transverse enlarged view of an underground outer wall body having a narrow groove width that does not require a water-permeable nonwoven fabric, and FIG. 3 is a vertical cross-sectional view thereof.

In the drawings, an underground wall 10 of the present invention is
A concrete wall 11 formed by pouring concrete in a portion surrounded by a form frame including an outer form (not shown) and a driving form 20 is provided. Reinforcing bars (not shown) are embedded in the concrete wall 11 to maintain its strength.

On the inner side surface of the concrete wall 11, the inner formwork used when forming the concrete wall 11 is integrated with the concrete wall 11 as a driving form 20. That is, among the molds for forming the concrete wall 11, the mold on the indoor side, that is, on the inner surface side of the underground outer wall body 10 is left without being removed as the driving mold 20 even after the concrete wall 11 is formed. ing.

The driving form 20 is formed by extruding cement and resin mixed mortar material. A narrow slit groove 21 is formed on the surface of the casting mold 20 on the concrete wall side, and a water permeable groove 21a communicating with the slit groove 21 is provided. The surface provided with the slit groove 21 is covered with a water-permeable nonwoven fabric 22.

With such a structure, it becomes possible to absorb the groundwater that has permeated the concrete wall 11 with the nonwoven fabric 22 and guide it to the water permeable groove 21a. Further, since the substantially circular water-permeable groove 21a is provided, there is no possibility that the drainage will be interrupted by efflorescence (precipitation of calcium) due to groundwater.

In such a driving form 20, as shown in FIG.
In some cases, the non-woven fabric 22 may not be required by forming the slit groove 21 narrow as shown in FIG. Non-woven 2
When there is no 2, the slit groove 21 allows the pressurized groundwater to enter the water permeable groove 21a to release the pressure.

Inside the driving frame 20, a hollow portion 21b having a quadrangular cross section is continuously provided. By forming such a hollow portion 21b, the strength as a plate material in the groove direction is high, the reinforcement that was conventionally performed with a steel pipe or the like is not necessary, and it is possible to reduce the weight and improve workability. .

Tongue-shaped joint portions 21c and 21d for joining the driving form 20 by fitting with each other are formed at both ends of the driving form 20. Such joining of the driving form 20 is performed by pushing the concrete block portions 21 until they come into contact with each other and fitting the joint portions 21c and 21d. By fitting the joint portions 21c and 21d, it is possible to prevent water leakage from the joint portion of the driving form 20. Further, as shown in FIG. 3, the vertical joining of the driving form 20 can be easily performed by inserting the joining dowel 23 into the hollow portion.

Next, a method of constructing the underground outer wall body 10 according to the present invention will be described. In the method for constructing the underground outer wall body according to the present invention, after the outer formwork is arranged, the reinforcing bars embedded inside the concrete wall 11 are arranged.

After that, the joint portion 21 of the driving form 20
By fitting c and 21d, the driving formwork 20 is joined and the formwork is installed. At this time, a separator is drawn through the medial portion 21e, which is a joint portion of the driving form 20, and the outer form, and the driving form 20 is temporarily fixed by a home tie. When this building is completed, the horizontal flap is attached to the home tie and tightened. The lower part of the driving form 20 is fixed with an amble or the like. In addition, in such a process, the driving form 20 is
It is possible to appropriately perform cutting processing, etc. on site.

Then, if necessary, the driving form 20
A water-permeable non-woven fabric is glued to the surface where the slit groove 21 is formed. In such a state, the outer mold and the driving mold 2
Concrete is poured between 0. Then, after placing the concrete, the separator is removed, and the media portion 21e
Is sealed, and the underground outer wall body according to the present invention is completed.

Thus, the underground outer wall body 10 according to the present invention
In the construction method, since the inner formwork forms the inner surface of the subterranean outer wall body 10 as the driving formwork 20 as it is, the work of removing the inner formwork is unnecessary, and the work efficiency is increased accordingly. Is possible.

In the method of constructing the underground outer wall body 10 according to the present invention, it is possible to further apply a finishing treatment such as painting or cloth to the inner surface of the driving form 20.

[0029]

As described above, according to the present invention,
It is possible to provide an underground outer wall body having a sufficient waterproof effect and easy to construct, and a construction method thereof.

[Brief description of drawings]

1 is a cross-sectional view showing an underground wall body according to the present invention.

FIG. 2 is an enlarged cross-sectional view of an underground outer wall having a narrow groove width that does not require a water-permeable nonwoven fabric.

FIG. 3 is a vertical cross-sectional view of an underground outer wall body having a narrow groove width that does not require a water-permeable nonwoven fabric.

[Explanation of Codes] 10 ... Underground outer wall 11 ... Concrete wall 20 ... Placing formwork 21 ... Slit groove 21a ... Water permeable groove 21b ... Hollow part 22 ... Nonwoven fabric 23 ... Dowels for joining

Claims (4)

[Claims] 1. A concrete wall supported and formed by a formwork of an underground outer wall body, wherein the formwork forms an inner surface of the underground outer wall body integrally with the concrete wall as a driving formwork, The driving formwork has a hollow portion inside, and a water-permeable groove is formed on the concrete wall side surface of the driving formwork, and the surface on which the water-permeable groove is formed is covered with a water-permeable nonwoven fabric. Underground outer wall characterized by being present. 2. A concrete wall formed by being supported by a formwork of an underground outer wall body, wherein the formwork forms an inner surface of the underground outer wall body integrally with the concrete wall as a driving formwork, The driving formwork has a hollow inside, and a slit groove is formed on a surface of the driving formwork on the concrete wall side, and a water-permeable groove communicating with the slit groove is provided. . 3. A hollow groove is formed in at least one of the molds for forming a concrete wall, a slit groove is formed on the concrete wall side surface of the one mold, and a water-permeable groove communicating with this slit groove. And a concrete wall is formed by placing concrete in the formwork, and one of the formwork is integrated with the inner side surface of the concrete wall as a driving formwork. Body construction method. 4. The method for constructing an underground wall body according to claim 3, wherein the surface on which the slit groove is formed is covered with a water-permeable nonwoven fabric.