Non-bearing wall and method for constructing non-bearing wall

Abstract

To improve quality of non-bearing walls.SOLUTION: Provided is a concrete non-bearing wall 1 to be placed adjacent to a structural member 20 via a structural slit 30, comprising a plurality of wall sections 10 and a slit material 12 that separates laterally the adjacent wall sections 10. At least one of the wall sections 10 is a spandrel wall section 10c formed below an opening 11, and preferably, the slit material 12 placed on a side edge of the spandrel wall section 10c extends downward from an end of the opening 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a non-bearing wall and a method for constructing a non-bearing wall. [Background technology]

[0002] When constructing a concrete structure, a formwork is assembled at the concrete pouring site, and concrete is poured into the formwork. Formwork for constructing non-load-bearing walls can be long horizontally. If concrete is poured into a long horizontal formwork, the concrete may separate as it moves horizontally inside the formwork, which may reduce its strength and durability. For this reason, there is a method of pouring concrete in several stages (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-54579 Summary of the Invention [Problem to be solved by the invention]

[0004] When pouring concrete in several batches within the same formwork, taking too long can result in cold joints forming at the joint surface, leading to a deterioration in the quality of the non-load-bearing concrete wall.

[0005] From this perspective, an object of the present invention is to improve the quality of non-load-bearing walls. [Means for solving the problem]

[0006] The non-load-bearing wall structure of the present invention, which solves the above-mentioned problems, is a non-load-bearing wall made of concrete that is placed next to a structural member via a structural slit, and is characterized in having a plurality of wall sections and slit materials that separate adjacent wall sections in the horizontal direction.

[0007] According to the present invention, the slit material acts as a formwork when constructing a non-load-bearing wall, so the amount of concrete used per go can be reduced, and concrete separation during the process of moving laterally within the formwork can be prevented. In addition, the slit material functions as an induction joint, so cracks can be prevented. This improves the quality of the non-load-bearing wall.

[0008] It is also preferable that at least one of the walls is a waist wall formed below the opening, and the slit material arranged on the side edge of the waist wall extends downward from the end of the opening.

[0009] At least one of the walls is a hanging wall formed above the opening, It is preferable that the slit member arranged on the side edge of the hanging wall portion extends upward from the end of the opening.

[0010] According to the present invention, the upper or lower area of ​​the opening can be surrounded by the slit material, improving the quality of the waist wall and the hanging wall. In addition, by using the slit material, this area functions as an induction joint, preventing cracks at the corners of the opening.

[0011] Also, a method for constructing a non-load-bearing wall with an opening is characterized by comprising the steps of: setting a structural slit at the boundary with a structural member, setting an open formwork at the position of the opening, placing a slit material between a first region that will be the wall on both the left and right sides of the opening and a second region that will be the waist wall below the opening, to separate the first region from the second region, and pouring concrete into the first region and the second region. Note that the order of the steps of setting the structural slit, setting the open formwork, and placing the slit material is not limited, and may be changed as appropriate depending on the situation at the site, or may be performed in parallel.

[0012] According to the present invention, the quality of even a non-load-bearing wall having an opening can be improved.

[0013] It is also preferable to cast advance mortar in the second region.

[0014] According to the present invention, even when advance mortar is used, quality can be ensured, and therefore waste can be reduced.

[0015] According to the non-bearing wall of the present invention, the quality of the non-bearing wall can be improved. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view showing a non-load-bearing wall according to the present embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a perspective view showing an attached state of the slit material. [Figure 4] FIG. 2 is a front view showing the formwork used to construct a non-load-bearing wall. [Diagram 5] FIG. 2 is a side view showing formwork for constructing a non-load-bearing wall. [Figure 6] 5 is a cross-sectional view taken along the line VV in FIG. 4. [Figure 7] FIG. 13 is a diagram showing a modified example of a non-load-bearing wall. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The embodiments of the present invention will be described with reference to the drawings as appropriate. The present invention is not limited to the following embodiments. In the following description, "front and back," "left and right," and "up and down" follow the arrows in FIG. 1. These directions are used for convenience of explanation and do not limit the directions of the present invention.

[0018] As shown in Fig. 1, a non-load-bearing wall 1 is a wall that is adjacent to a structural member 20, such as a column or wall formed of reinforced concrete, and is arranged through a structural slit 30. The non-load-bearing wall 1 is a wall structure that is not a major structural part, such as a balcony or a common corridor of an apartment building. The non-load-bearing wall 1 comprises multiple wall portions 10, an opening 11, and a slit material 12. Furthermore, a horizontal slit 31 is arranged on the underside of the non-load-bearing wall 1.

[0019] As shown in Fig. 1, the wall 10 is a concrete member formed by pouring concrete into a formwork. A rectangular opening 11 is formed in the non-bearing wall 1, penetrating in the front-to-rear direction. A plurality of wall portions 10 are arranged around the opening 11. In the following, the wall portion 10 on the left side of the opening 11 is referred to as the left wall portion 10a, the wall portion 10 on the right side of the opening 11 is referred to as the right wall portion 10b, the wall portion 10 below the opening 11 is referred to as the waist wall portion 10c, and the wall portion 10 above the opening 11 is referred to as the hanging wall portion 10d.

[0020] Adjacent walls 10, 10 are divided by slit material 12. That is, slit material 12 is disposed in a total of four places: between left wall 10a and waist wall 10c, between left wall 10a and hanging wall 10d, between right wall 10b and waist wall 10c, and between right wall 10b and hanging wall 10d.

[0021] As shown in FIG. 2, the slit material 12 includes a plate-shaped slit core material 12a and a pair of left and right force aggregates 12b, 12b arranged on the sides of the slit core material 12a. The material of the slit core material 12a is not particularly limited, but it is composed of fibers such as rock wool and glass wool, foam, etc., for example. The pair of left and right force aggregates 12b, 12b are formed to be approximately the same shape. The force aggregates 12b are formed by extrusion molding of synthetic resins such as hard vinyl and polypropylene. A groove portion 12c with a cross section of approximately U-shape is formed on the inside of each force aggregate 12b (the side facing the other force aggregates 12b). The side of the slit core material 12a is fitted into the groove portion 12c. An outer groove portion 12d with a cross section of approximately U-shape is formed on the outside of each force aggregate 12b.

[0022] As shown in Fig. 3, the outer groove portion 12d fits into a protrusion 41a provided on the inside of the formwork 40. The slit material 12 is disposed between the opposing formworks 40, 40, and is fixed to the formworks 40, 40 by fitting the outer groove portions 12d, 12d into the protrusions 41a, 41a. Then, with the slit material 12 disposed between the formworks 40, 40, concrete is poured to form the wall portion 10 (see Fig. 1).

[0023] The size of the slit core material 12a is not particularly limited, but for example, the longitudinal dimension (height direction during construction) is 1000 to 2500 mm, the transverse dimension is 100 to 300 mm, and the thickness is about 20 to 50 mm.

[0024] Next, a method for constructing the non-bearing wall 1 will be described with reference to Fig. 1 to Fig. 6. The method for manufacturing the non-bearing wall of this embodiment includes a preparation step, a slit arranging step, an open formwork arranging step, a first casting step, and a second casting step.

[0025] The preparation process is a process of opposing a pair of formwork 40, 40 for forming the wall portion 10 and the structural member 20, and installing a structural slit 30. As shown in Fig. 1, the structural slit 30 is placed at the boundary between the structural member 20 and the wall portion 10. The configuration of the structural slit 30 may be the same as that of the slit material 12, or a different one may be used.

[0026] As shown in FIG. 4, the formwork 40 includes a sheathing 41 that contacts the concrete, an outer end 42 that extends laterally, and an inner end 43 that extends vertically. The outer end 42 and the inner end 43 are arranged to support the load of the concrete to be poured. In this embodiment, the outer end 42 is made of a round steel pipe, and the inner end 43 is made of wood. The outer end 42 may be made of other materials or shapes, such as a square steel pipe. As shown in FIG. 5, the formworks 40 are arranged opposite each other and fastened together using formwork fastening fittings 44.

[0027] The slit arrangement step is a step of arranging slit materials 12 above and below the opening 11, as shown in Fig. 1 and Fig. 4. If the left and right regions of the opening 11 (regions that will become the left wall portion 10a and the right wall portion 10b) are defined as a first region S1, the lower region of the opening 11 (region that will become the waist wall portion 10c) is defined as a second region S2, and the upper region of the opening 11 (region that will become the hanging wall portion 10d) is defined as a third region S3, the slit materials 12 are arranged at the boundary between the first region S1 and the second region S2 and the boundary between the first region S1 and the third region S3. The lower slit material 12 extends downward from the end of the opening 11, and the upper slit material 12 extends upward from the end of the opening 11.

[0028] The open-end formwork placement step is a step of placing an open-end formwork 50 at a position where an opening is to be formed, as shown in FIG. 4. The open-end formwork 50 is configured by connecting plate-like formwork members 51, 52, 53, and 54 in a rectangular shape. As shown in FIG. 5, the formwork member 53, which is the lower frame, is placed so as to close the gap at the top of the formworks 40a and 40b that face each other across the second region S2. The formwork member 54, which is the upper frame, is placed so as to close the gap at the bottom of the formworks 40c and 40d that face each other across the third region S3. The formwork member 54, which is the upper frame, is supported by a pipe support 55 erected on the formwork member 53, which is the lower frame. The order of the slit arrangement step and the open form arrangement step can be changed as appropriate depending on the site conditions, etc., and they may be performed in parallel.

[0029] The first pouring step is a step of pouring concrete into the second region S2. As shown in FIG. 5, in the first pouring step of this embodiment, concrete is poured from the openings at the tops of the opposing forms 40a, 40b. As shown in FIG. 6, the second region S2 is an area surrounded by the opposing forms 40, 40 and the slit material 12, and is a portion that becomes the waist wall portion 10c. Since the first region S1 and the second region S2 are separated by the slit material 12, the concrete poured into the second region S2 remains in the second region S2 and does not flow into the first region S1. Advance mortar may be poured into the second region S2.

[0030] As shown in Fig. 4, the first region S1 is adjacent to the structural slit 30 (see Fig. 1), as well as adjacent to the slit material 12 and the open formwork 50 (formwork member 51). The third region S3 is a region divided by the left and right slit materials 12 and the lower open formwork 50 (formwork member 54).

[0031] Finally, a second pouring step is performed. In the second pouring step, concrete is poured into the first region S1 and the third region S3 on the left and right sides. Since the first region S1 and the third region S3 are separated by the slit material 12, the concrete poured into the third region S3 remains in the third region S3 and does not flow into the first region S1. After the concrete has been cured for a predetermined time, the formwork 40 is removed to form a non-bearing wall 1 having an opening 11 as shown in FIG. 1. Note that advance mortar may be poured into the third region S3.

[0032] The non-bearing wall of this embodiment described above includes multiple wall sections 10 and slit members 12 that separate adjacent wall sections 10 in the horizontal direction, so that the slit members 12 function as formwork to divide the area into which concrete is poured. This makes it possible to reduce the amount of concrete poured at one time and to prevent the concrete from separating during the process of moving laterally within the formwork 40. This improves the quality of the non-bearing wall 1.

[0033] Furthermore, at least one of the walls 10 is a waist wall portion 10c formed below the opening 11, and a slit material 12 arranged on the side edge of the waist wall portion 10c extends downward from the end of the opening 11. Furthermore, at least one of the walls 10 is a hanging wall portion 10d formed above the opening 11, and a slit material 12 arranged on the side edge portion of the hanging wall portion 10d extends upward from the end of the opening 11. This allows the second region S2 and the third region S3 to be surrounded by the slit material 12, making it easy to pour concrete even around the opening 11 where pouring concrete is difficult. This improves the quality of the waist wall 10c and the hanging wall 10d. In addition, the use of the slit material 12 allows cracks to be concentrated in this area, preventing cracks from occurring at the corners of the opening 11.

[0034] Furthermore, according to the method for constructing a non-load-bearing wall of this embodiment, the quality can be improved even for a non-load-bearing wall 1 having an opening 11, as it includes a preparation step of installing a structural slit 30 at the boundary with the structural member 20, an opening formwork arrangement step of installing an opening formwork 50 at a position that will become the opening 11, an arrangement step of arranging a slit material 12 separating the first region S1 and the second region S2 between the first region S1 that will be the wall portions on both the left and right sides of the opening 11 (left wall portion 10a, right wall portion 10b) and the second region S2 that will be the waist wall portion 10c below the opening 11, a first pouring step of pouring concrete into the second region S2, and a second pouring step of pouring concrete into the first region S1 and the third region S3.

[0035] Furthermore, according to the method for constructing a non-bearing wall of this embodiment, it is possible to pour concrete by strictly distinguishing between the concrete of the structural member 20 and the concrete of the non-bearing wall 1. Therefore, even if pre-placed mortar is poured into the second region S2, the quality of the structural member 20 is not impaired. This makes it possible to reduce waste.

[0036] Even if the non-load-bearing wall does not have an opening, the slit material 12 may be placed inside the formwork and concrete may be poured as shown in FIG. 7. Even in such a case, the slit material 12 can divide the non-load-bearing wall into multiple wall sections 10, reducing the amount of concrete to be filled at one time. This improves the quality of the concrete in the wall sections 10. The slit material 12 also functions as a crack-inducing joint with a cross-sectional loss rate of 100%. This makes it possible to prevent cracks on the wall surface of the wall sections 10.

[0037] Although the embodiment and the modified examples of the present invention have been described above, appropriate design changes are possible within the scope of the present invention. For example, in this embodiment, both the waist wall portion 10c and the hanging wall portion 10d are formed, but only one of them may be formed. [Explanation of symbols]

[0038] 1 Non-load-bearing wall 10 Wall section 10a Left wall 10b Right wall section 10c Waist wall 10d Hanging wall 11 Opening 12 Slit material 20 Structural members 30 Structural slit

Claims

1. A non-load-bearing concrete wall that is placed next to a structural member through a structural slit, A plurality of walls; A non-load-bearing wall characterized by comprising a slit material separating adjacent wall portions in the horizontal direction.

2. At least one of the walls is a waist wall formed below the opening, 2. A non-load-bearing wall according to claim 1, characterized in that the slit material arranged on the side edge portion of the waist wall portion extends downward from the end portion of the opening.

3. At least one of the walls is a hanging wall formed above the opening, 3. A non-load-bearing wall according to claim 1, wherein the slit material arranged on the side edge of the hanging wall portion extends upward from the end of the opening.

4. A method for constructing a non-load-bearing wall with an opening, comprising the steps of: A step of providing a structural slit at the boundary with the structural member; A step of installing an open formwork at a position that will become the opening; A step of disposing a slit material between a first region which becomes a wall portion on both the left and right sides of the opening and a second region which becomes a waist wall portion on the lower side of the opening, the slit material separating the first region and the second region; and pouring concrete into the first area and the second area.

5. The method for constructing a non-load-bearing wall according to claim 4, further comprising pouring advance mortar into the second region.

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