Construction method for supporting structures for exterior building materials

Abstract

At least one embodiment of the present disclosure provides a method for constructing an exterior building material support structure that ensures waterproofing and can be provided in a short construction period. [Solution] A construction method for an exterior building material support structure that supports exterior building materials separating the interior and exterior of a building comprises a support member for supporting exterior building materials, a support member fixing step for fixing the support member to the support concrete such that at least a part of the support member extends upward from the support concrete, an exterior building material attachment step for attaching exterior building materials to the support member, and a rising portion casting step for casting a rising portion formed of waterproof mortar into the first gap between the support concrete and the exterior building materials.

Description

Technical Field

[0001] This disclosure relates to a construction method for an exterior building material support structure.

Background Art

[0002] Conventionally, a support structure for a balcony sash has been known. The support structure includes slab concrete, a standing portion rising from the slab concrete, and a balcony sash installed on the standing portion. The standing portion has a waterproof function to prevent water such as rain from entering the indoor side of the balcony sash. Therefore, if the standing portion is integral with the slab concrete, high waterproof performance is expected.

[0003] However, from the perspective of shortening the construction period of a building, it is preferable that the standing portion is separate from the slab concrete. If the standing portion is integrated with the slab concrete, it is necessary to use a floating formwork for forming the standing portion, and undulations will occur on the standing portion after casting. As a result, the construction period will be prolonged by the number of man-hours required for the repair work of the undulated standing portion.

[0004] For example, when constructing a high-rise condominium, the work of installing the main structures such as columns, beams, floors, and balconies is repeatedly carried out floor by floor. If the standing portion is integrated with the slab concrete, the man-hours required per floor (cycle days) will become longer due to the above reasons. The influence of such an increase in man-hours becomes greater as the number of floors of the high-rise condominium increases. Therefore, as in Patent Document 1, it is preferable that the slab concrete and the standing portion are configured separately.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, if the slab concrete and the rising section are constructed as separate components, rainwater and other water can easily seep between them, raising concerns about water leakage into the building. Ensuring the waterproofing function that the rising section is supposed to perform requires an increase in the amount of work required for its construction, which can prolong the construction period of the building.

[0007] The purpose of this disclosure is to provide a construction method for an exterior building material support structure that ensures waterproofing and can be provided in a short construction period. [Means for solving the problem]

[0008] 1) A method for constructing an exterior building material support structure according to at least one embodiment of the present disclosure is: A construction method for an exterior building material support structure that supports exterior building materials that separate the interior and exterior of a building, A support member for supporting the exterior building material, comprising a support member fixing step for fixing the support member to the support concrete so as to extend upward from the support concrete, An exterior building material mounting step for attaching the exterior building material to the support member, A rising section pouring step is provided for pouring a rising section, which is formed of waterproof mortar, into the first gap between the support concrete and the exterior building material. It is equipped with.

[0009] When attempting to install exterior building materials on the rising section after pouring the rising section onto the supporting concrete, the resulting warping of the rising section can make installation difficult. Therefore, it is necessary to spend time repairing the warping of the rising section before installing the exterior building materials. In this regard, according to the construction method described in 1) above, since the exterior building materials are attached to the support members fixed to the support concrete, the rising portion can be cast into the first gap between the support concrete and the exterior building materials. Since the rising portion is formed with waterproof mortar, the waterproofness of the exterior building material support structure is ensured. Therefore, since an exterior building material support structure with waterproofness can be provided without performing repair work on the rising portion, the construction period of the building can be shortened.

[0010] 2) In some embodiments, the method for constructing the exterior building material support structure described in 1) above, When the direction in which the aforementioned rising portion extends is defined as the first direction, The system further includes a waterproof sealant installation step, which is performed on the supporting concrete along the first direction prior to the rising section concrete pouring step.

[0011] According to the construction method described in 2) above, the waterproof sealant is installed on the support concrete along the first direction before the concrete pouring step for the rising section, so that the waterproof sealant can be embedded between the support concrete and the rising section. By installing the waterproof sealant, it becomes more difficult for water to penetrate into the building from between the support concrete and the rising section. Therefore, an exterior building material support structure with improved waterproofing can be provided.

[0012] 3) In some embodiments, the method for constructing the exterior building material support structure described in 2) above, The aforementioned waterproof sealant is A first portion is installed between the supporting concrete and the rising portion and extends along the first direction, A second portion rises from the end of the first portion in the first direction and extends along the side surface of an adjacent structure, Includes.

[0013] According to the construction method described in 3) above, in the waterproof sealant installation step, the waterproof sealant (first part and second part) is installed on the support concrete and on the side of the adjacent structure, making it difficult for water to penetrate into the interior from between the support concrete and the rising part, and between the rising part and the structure. Therefore, it is possible to provide an exterior building material support structure that can prevent water from entering the interior even if water accumulates outdoors.

[0014] 4) In some embodiments, the method for constructing the exterior building material support structure described in any of 1) to 3) above, In the aforementioned rising section casting step, the rising section is cast such that a second gap opening to the outside is formed between the rising section and the exterior building material. The system further includes a waterproof seal installation step for placing a waterproof seal in the second gap between the rising portion and the exterior building material.

[0015] According to the construction method described in 4) above, in the rising section pouring step, the rising section is poured so as to form a second gap that opens to the outside between the rising section and the exterior building material. Subsequently, in the waterproof seal installation step, the waterproof seal is placed in the second gap formed by the rising section pouring step. Since the waterproof seal is placed in the second gap, it becomes difficult for water to penetrate into the interior from between the exterior building material and the rising section. Therefore, an exterior building material support structure with improved waterproofing can be provided.

[0016] 5) In some embodiments, a method for constructing an exterior building material support structure as described in any of 1) to 4) above, The aforementioned rising portion has an outdoor side surface that rises from the supporting concrete and is oriented toward the outdoors. The system includes a first waterproof membrane application step in which the first waterproof membrane is attached to the outdoor side surface.

[0017] According to the construction method of 5) above, in the first waterproof film pasting step, the first waterproof film is pasted on the outdoor side surface of the standing upper part. Therefore, it is difficult for water to penetrate indoors from between the support concrete and the standing upper part, so an exterior building material support structure with better waterproof performance can be provided.

[0018] 6) In some embodiments, it is a construction method of the exterior building material support structure according to any one of 1) to 3) above, The step of placing the standing upper part is a main body part placing step of placing a main body part having an indoor side surface rising from the support concrete and oriented indoors, an additional part placing step of placing an additional part having an outdoor side surface rising from the support concrete and oriented outdoors, and includes Between the main body part placing step and the additional part placing step, it further includes a second waterproof film pasting step of pasting a second waterproof film on the upper surface of the support concrete and the outdoor side surface of the main body part.

[0019] According to the construction method of 6) above, in the main body part placing step, the main body part is placed so as to have an indoor side surface. Then, in the second waterproof film pasting step, the second waterproof film is pasted on the outdoor side surface of the main body part. And in the additional part placing step, the additional part is placed so as to have an outdoor side surface. Therefore, at least a part of the second waterproof film can be embedded between the main body part and the additional part, and between the additional part and the support concrete. It is difficult for water to penetrate indoors from between the support concrete and the standing upper part, so an exterior building material support structure with better waterproof performance can be provided.

[0020] 7) In some embodiments, it is a construction method of the exterior building material support structure according to any one of 6) above, In the additional part placing step, the additional part is placed so that a second gap opening outdoors is formed between the additional part and the exterior building material, The system further includes a waterproof seal installation step for installing a waterproof seal in the second gap between the additional portion and the exterior building material.

[0021] According to the construction method described in 7) above, in the additional section casting step, the additional section is cast so as to form a second gap that opens to the outside between the additional section and the exterior building material. Then, in the waterproof seal installation step, the waterproof seal is placed in the second gap formed by the additional section casting step. Since the waterproof seal is placed in the second gap, it becomes difficult for water to penetrate into the interior from between the exterior building material and the main body. Therefore, an exterior building material support structure with improved waterproofing can be provided.

[0022] 8) In some embodiments, a method for constructing an exterior building material support structure as described in either 6) or 7) above, The system further includes a first waterproof membrane application step of applying a first waterproof membrane to the outdoor side surface of the additional portion.

[0023] According to the construction method described in 8) above, in the first waterproofing membrane application step, the first waterproofing membrane is attached to the outdoor side surface of the additional section. Therefore, water is less likely to penetrate into the interior from between the supporting concrete and the additional section, thus providing an exterior building material support structure with improved waterproofing. [Effects of the Invention]

[0024] According to this disclosure, a construction method for an exterior building material support structure that ensures waterproofing can be provided in a short construction period. [Brief explanation of the drawing]

[0025] [Figure 1] A schematic cross-sectional view of a support structure for exterior building materials (first embodiment). [Figure 2] This is a schematic cross-sectional view of the exterior building material support structure as seen from a second direction. [Figure 3] A schematic cross-sectional view of the exterior building material support structure (second embodiment). [Figure 4]This is a flowchart illustrating the construction method of an exterior building material support structure according to one embodiment (first embodiment). [Figure 5] This is a flowchart illustrating the construction method of an exterior building material support structure according to another embodiment (second embodiment). [Figure 6] This is a schematic cross-sectional view of a structure obtained by the procedure up to the exterior building material installation step in a construction method for an exterior building material support structure according to one embodiment. [Figure 7] This is a schematic cross-sectional view of a structure obtained by the procedure up to the exterior building material installation step in a construction method for an exterior building material support structure according to another embodiment. [Figure 8] This is a schematic cross-sectional view of a structure obtained after the concrete pouring step of the rising section in a construction method for an exterior building material support structure according to one embodiment. [Figure 9] This is a schematic cross-sectional view of a structure obtained after the main body casting step in a construction method for an exterior building material support structure according to another embodiment. [Figure 10] This is a schematic cross-sectional view of a structure obtained by the second waterproofing membrane application step and the additional part casting step in the construction method of an exterior building material support structure according to another embodiment. [Modes for carrying out the invention]

[0026] Hereinafter, several embodiments of this disclosure will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described or shown in the drawings as embodiments are not intended to limit the scope of this disclosure, but are merely illustrative examples. For example, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" should not only strictly describe such arrangements, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. For example, expressions such as "identical," "equal," and "homogeneous" that describe things being in an equal state not only describe a state of being strictly equal, but also describe a state in which there is a tolerance or a difference that is sufficient to achieve the same function. For example, expressions describing shapes such as squares or cylinders shall not only represent geometrically precise shapes such as squares or cylinders, but also shapes that include protrusions, chamfers, etc., to the extent that the same effect can be achieved. On the other hand, expressions such as "possessing," "including," or "having" one component are not exclusive expressions that exclude the existence of other components. Note that similar configurations may be denoted by the same reference numerals and their explanations may be omitted.

[0027] First, the configuration of the exterior building material support structure 1 according to several embodiments will be described with reference to Figures 1 to 3. Hereinafter, the exterior building material support structure 1 may be abbreviated as "support structure 1".

[0028] Figure 1 is a schematic diagram of an exterior building material support structure 1 according to the first embodiment. The exterior building material support structure 1 supports an exterior building material 2 that separates the interior and exterior of a building 9, which may be, for example, a high-rise apartment building. In this embodiment, the exterior building material 2 is a balcony sash. In Figure 1, the left side of the exterior building material 2 is the exterior side of the building 9 and the right side is the interior side.

[0029] The support structure 1 comprises a support concrete 3, which is either slab concrete or beam concrete, and a rising section 4 that rises from the support concrete 3. The support concrete 3 may be slab concrete or beam concrete. The rising section 4, installed on the support concrete 3, extends in a first direction along the horizontal (the front-to-back direction in Figure 1) and supports the exterior building material 2. The rising section 4 includes an outdoor side surface 41a, which is oriented toward the end face facing the outside, and the outdoor side surface 41a rises from the support concrete 3. The rising section 4 also includes an indoor side surface 41b, which is oriented toward the inside, and the indoor side surface 41b rises from the support concrete 3.

[0030] In this embodiment, the rising portion 4 is formed of mortar containing a waterproofing agent (i.e., waterproof mortar). This waterproofing agent is a cement-modifying admixture-type waterproofing agent that imparts water repellency to the mortar. The ratio of the waterproofing agent to the mortar is, for example, 1% or more and 10% or less by weight, preferably 2% or more and 6% or less. According to the inventor's knowledge, if the ratio is less than 1%, the waterproofing properties of the mortar decrease, and if it exceeds 10%, the strength of the mortar decreases.

[0031] The waterproof mortar is formulated to have a permeability ratio of 70% or less in the permeability test of mortar without additives. This enhances the waterproofing performance of the waterproof mortar. The permeability test is conducted in accordance with the "Test Method for Building Cement Waterproofing Agents" specified in JIS-A-1404 (2015), and the water pressure for the permeability test is 3.0 × 10⁻⁶. 5 The water pressure is applied in Pa for 1 hour.

[0032] The aforementioned waterproofing agents include inorganic and organic types. Inorganic types include calcium chloride-based, sodium silicate-based, and silica-based agents, while organic types include higher fatty acid-based agents such as higher fatty acids and higher fatty acid salts.

[0033] The support structure 1 illustrated in Figure 1 further comprises a waterproof sealant 5 installed between the support concrete 3 and the rising portion 4. The waterproof sealant 5 includes an elastic, plastic, or viscous material having waterproofing properties. In this example, the waterproof sealant 5 is a butyl sealant extending in the first direction. Here, the horizontal direction perpendicular to the first direction is defined as the second direction. The second direction corresponds to the left-right direction in Figure 1, as well as the width direction of the waterproof sealant 5.

[0034] Figure 2 is a schematic cross-sectional view of the exterior building material support structure 1 as seen from a second direction. In Figure 2, a cross-section of the support structure 1 cut at the position of the waterproof sealant 5 is shown. In Figure 2, the first direction corresponds to the left-right direction, the second direction corresponds to the front-to-back direction of the paper, and the height direction corresponds to the up-and-down direction. As shown in Figure 2, the support structure 1 is adjacent to the structure 200 in the second direction. The structure 200 is not particularly limited and may be, for example, the exterior wall or columns of the building 9.

[0035] As shown in Figure 3, the waterproof sealant 5 includes a first portion 51 extending along a first direction and a second portion 53 rising from the end 52 of the first portion 51 in a second direction. The second portion 53 extends along the height direction.

[0036] The first portion 51 is installed between the support concrete 3 and the rising portion 4. In the embodiment illustrated in Figure 2, the end portion 52 of the first portion 51 is provided so as to be in contact with the side surface 202 of the structure 200 adjacent to the exterior building material support structure 1.

[0037] The second part 53 extends along the side surface 202 of the structure 200 adjacent to the exterior building material support structure 1. In the embodiment shown in Figure 2, the second portion 53 rises from both ends 52 of the first portion 51. In other embodiments, the second portion 53 rises from one end 52 of the first portion 51.

[0038] The height h' of the second part 53 preferably satisfies the condition 0.25 ≤ h' / H ≤ 1, where H is the height of the rising part 4. By satisfying the above condition, even if water accumulates outside the building 9, water intrusion into the interior can be effectively prevented.

[0039] Returning to Figure 1, the support structure 1 further includes a waterproof seal 19 installed between the rising portion 4 and the exterior building material 2, and positioned facing outwards. The waterproof seal 19 extends in the first direction. The waterproof seal 19 includes an elastic, plastic, or viscous material having waterproof properties. The waterproof seal 19 is a urethane seal or a silicone seal.

[0040] The upper end of the outdoor side surface 41a of the rising section 4 is located lower than the lower surface 2c of the exterior building material 2. The rising section 4 further has a surface 41e located on the indoor side of the outdoor side surface 41a, and a surface 41f connecting the upper end of the outdoor side surface 41a and the lower end of surface 41e.

[0041] The waterproof seal 19 has a side surface 19a oriented toward the outdoors, a side surface 19b located more indoors than side surface 19a, and a surface 19c connecting the lower end of side surface 19a and the lower end of side surface 19b. Side surface 19a of the waterproof seal 19 is oriented to be continuous with the outdoor side surface 41a of the rising section 4. Also, side surface 19a of the waterproof seal 19 is oriented to be continuous with the outdoor side surface 2a of the exterior building material 2. Side surface 19b of the waterproof seal 19 faces surface 41e of the rising section 4. Surface surface 19c of the waterproof seal 19 faces surface 41f of the rising section 4.

[0042] In some embodiments, as shown in Figure 1, the lower end of side surface 19a of the waterproof seal 19 is located below the lower end of side surface 19b. That is, the surface 19c of the waterproof seal 19 slopes downward from side surface 19b toward side surface 19a.

[0043] As shown in Figure 1, the support structure 1 further comprises a first waterproof membrane 10 attached to the support concrete 3 and the rising portion 4. The first waterproof membrane 10 is a polyurethane-based seal extending in a first direction. The first waterproof membrane 10 consists of a first horizontal attachment portion 11 and a first vertical attachment portion 12.

[0044] The first horizontal attachment section 11 is attached to the upper surface 31 of the support concrete 3. The first vertical attachment section 12 rises from the first horizontal attachment section 11 and is attached to the outdoor side surface 41a of the vertical section 4. However, the first waterproof membrane 10 does not necessarily include the first horizontal attachment section 11. Also, instead of being an adhesive-type seal, the first waterproof membrane 10 may be formed by the solidification of a liquid waterproofing agent.

[0045] In some embodiments, as shown in Figure 1, the upper end of the first vertical attachment portion 12 is attached at a height position relative to the lower surface 2c of the exterior building material 2. In other embodiments, the upper end of the first vertical attachment portion 12 may be attached to the outdoor side surface 2a of the exterior building material 2 at a height above the lower surface 2c of the exterior building material 2.

[0046] In some embodiments, as shown in Figure 1, the first vertical attachment portion 12 is attached to the outdoor side surface 41a of the vertical portion 4 and the side surface 19a of the waterproof seal 19.

[0047] Figure 3 is a schematic diagram of the exterior building material support structure 1 according to the second embodiment. In Figure 3, the same reference numerals are used for the same components as in Figure 1. The support structure 1 further includes a second waterproof membrane 20 positioned on the outdoor side of the waterproof sealant 5. The second waterproof membrane 20 consists of a second horizontal attachment portion 21 and a second vertical attachment portion 22. The second horizontal attachment portion 21 is attached to the upper surface 31 of the support concrete 3 between the support concrete 3 and the vertical portion 4. In addition, a part of the second horizontal attachment portion 21 is positioned on the outdoor side of the vertical portion 4 and is interposed between the first horizontal attachment portion 11 and the support concrete 3. In other words, the first horizontal attachment portion 11 according to the second embodiment is attached to the upper surface 31 of the support concrete 3 via the second horizontal attachment portion 21. The second vertical attachment portion 22 rises from the second horizontal attachment portion 21 and extends vertically within the vertical portion 4. A portion of the second vertical attachment portion 22 is attached to the side surface 19b of the waterproof seal 19. The second waterproof membrane 20 may be formed by the solidification of a liquid waterproofing agent instead of being an adhesive-type seal.

[0048] In some embodiments, as shown in Figure 3, the rising portion 4 includes a main body 42 having an indoor side surface 42b (41b) oriented toward the interior, and an additional portion 43 having an outdoor side surface 43a (41a) oriented toward the exterior. The main body 42 further has a side surface 42a located on the outdoor side of the indoor side surface 42b (41b). The additional portion 43 further has a side surface 43b located on the indoor side of the outdoor side surface 43a (41a), and a surface 43f (41f) connecting the upper end of the outdoor side surface 43a (41a) and the upper end of the side surface 43b. The surface 43f of the additional portion 43 is located below the lower surface 2c of the exterior building material 2. In the embodiment shown in Figure 3, the second rising attachment portion 22 is located between the side surface 42a of the main body portion 42 and the side surface 43b of the additional portion 43. In the embodiment illustrated in Figure 3, the second rising attachment portion 22 is located between the side surface 42a of the main body portion 42 and the side surface 43b of the additional portion 43 and the side surface 19b of the waterproof seal 19.

[0049] In some embodiments, the first waterproof membrane 10 and the second waterproof membrane 20 are made of different materials. The first waterproof membrane 10 and the second waterproof membrane 20 are each made of materials that have different properties other than waterproofing. The first waterproofing membrane 10 is exposed to sunlight and rainfall, so high waterproofing and weather resistance are required. Therefore, the first waterproofing membrane 10 is preferably a urethane-based coating. The second waterproofing membrane 20 is required to have high adhesion and durability to the waterproofing mortar of the rising section 4. Therefore, it is preferable that the second waterproofing membrane 20 be, for example, a polymer cement-based coating.

[0050] Next, with reference to Figures 4 to 10, several embodiments of the construction methods for the exterior building material support structure 1 described above will be explained. Figure 4 is a flowchart illustrating the construction method of an exterior building material support structure according to one embodiment. Figure 5 is a flowchart illustrating the construction method of an exterior building material support structure according to another embodiment. Figure 6 is a schematic cross-sectional view of a structure obtained by the procedure up to the exterior building material installation step in a construction method for an exterior building material support structure according to one embodiment. Figure 7 is a schematic cross-sectional view of a structure obtained by the procedure up to the exterior building material installation step in a construction method for an exterior building material support structure according to another embodiment. Figure 8 is a schematic cross-sectional view of a structure obtained after the concrete pouring step of the rising section in a construction method for an exterior building material support structure according to one embodiment. Figure 9 is a schematic cross-sectional view of a structure obtained after the main body casting step in a construction method for an exterior building material support structure according to another embodiment. Figure 10 is a schematic cross-sectional view of a structure obtained by the second waterproofing membrane application step and the additional part casting step in a construction method for an exterior building material support structure according to another embodiment.

[0051] In some embodiments, the support member fixing step S10 is performed as shown in Figures 4 and 5. In the support member fixing step S10, as shown in Figures 6 and 7, support members 7 (7A, 7B) for supporting the exterior building material 2 are fixed to the support concrete 3. At least a portion of the support members 7 (7A, 7B) extends upward from the support concrete 3. That is, the support members 7 (7A, 7B) include a first portion 71 (71A, 71B) fixed to the support concrete 3 and an intermediate portion 72 (72A, 72B) extending upward from the first portion 71 (71A, 71B). The method of fixing the support members 7 (7A, 7B) is not particularly limited. For example, the first portion 71 (one end portion 71A, described later) of the support member 7 (support rod 7A, described later) may be embedded in the support concrete 3, or the first portion 71 (71B) may be fixed to the upper surface 31 of the support concrete 3 using other known mounting techniques. The support member 7 may be a single support member 7 extending along the first direction in which the rising portion 4 extends, or it may be a plurality of support members 7 arranged along the first direction.

[0052] After fixing the support members 7 (7A, 7B) to the support concrete 3, the exterior building material installation step S30 is performed. In the exterior building material installation step S30, the exterior building material 2 is attached to the support members 7 (7A, 7B) as shown in Figures 6 and 7. That is, the support members 7 (7A, 7B) further include a second portion 73 (73A, 73B) to which the exterior building material 2 is attached. The second portion 73 (73A, 73B) is located on the opposite side of the first portion 71 (71A, 71B), with the intermediate portion 72 (72A, 72B) in between. By attaching the exterior building material 2 to the second portion 73 (73A, 73B) of the support members 7 (7A, 7B), the lower surface 2c of the exterior building material 2 is positioned higher than the upper surface 31 of the support concrete 3. Thus, a first gap G1 is formed between the exterior building material 2 and the support concrete 3. The exterior building material 2 is attached to the support members 7 (7A, 7B) by welding the metal portion of the exterior building material 2 to the second portion 73 (73A, 73B) of the support members 7 (7A, 7B). However, the method of attaching the exterior building material 2 is not limited to welding, and other known attachment techniques may be used.

[0053] In the embodiment shown in Figure 6, the support member 7 is a support rod 7A. The support rod 7A, as the support member 7, includes one end 71A which is embedded in the support concrete 3 and the other end 73A to which the exterior building material 2 is attached. In the support member fixing step S10, as shown in Figure 6, the support rod 7A is fixed to the support concrete 3 by embedding one end 71A of the support rod 7A into the support concrete 3.

[0054] In the embodiment shown in Figure 7, the support member 7B includes a first portion 71B fixed to the support concrete 3 and a second portion 73B to which the exterior building material 2 is attached. The first portion 71B extends along a second direction, which is a horizontal direction perpendicular to the first direction. In the support member fixing step S10, as shown in Figure 7, the first portion 71B of the support member 7B is fixed to the upper surface 31 of the support concrete 3. At this time, as illustrated in Figure 7, the first portion 71B may be fixed to the support concrete 3 with an anchor 8. The type of anchor 8 is not particularly limited and may be a metal anchor or an adhesive anchor.

[0055] In the embodiment illustrated in Figure 7, the support member 7B is an H-shaped steel beam whose cross-sectional shape when viewed from the first direction is H-shaped. In the H-shaped steel beam as the support member 7B, the second portion 73B extends along the second direction. As illustrated in Figure 7, the exterior building material 2 is placed on the surface 73b of the second portion 73B. In other embodiments not shown, the support member 7B is an angle steel (angle member) having an L-shaped cross-section when viewed from the first direction. That is, in the case of the angle steel as the support member 7B, the outer part (72B) extends upward from one end of the first part (71B) in the second direction. In yet another embodiment not shown, the support member 7B is a T-shaped steel beam whose cross-sectional shape when viewed from the first direction is T-shaped. That is, in the T-shaped steel beam as the support member 7B, the main body (72B) extends upward from between the ends of the first portion (71B) in the second direction.

[0056] After attaching the exterior building material 2 to the support members 7 (7A, 7B), the rising section concrete pouring step S40 is performed. In the rising section pouring step S40, the rising section 4 is formed in the first gap G1 as shown in Figures 8 to 10. The rising section 4 is formed with waterproof mortar as described above. After filling the first gap G1 with waterproof mortar, the waterproof mortar is allowed to harden.

[0057] According to the construction method described above, a rising section 4 formed of waterproof mortar can be poured into the first gap G1 between the support concrete 3 and the exterior building material 2. Therefore, an exterior building material support structure 1 with waterproof properties can be provided without repairing the rising section 4, thus shortening the construction period of the building.

[0058] In the embodiment shown in Figure 5, the rising section casting step S40 includes a main body casting step S42 for casting the main body 42 and an additional section casting step S44 for casting the additional section 43. The main body casting step S42 is performed after the exterior building material installation step S30. After the main body casting step S42, the second waterproofing membrane application step S50, which will be described later, is performed, and then the additional section casting step S44 is performed. In the main body casting step S42, as shown in Figures 9 and 10, the main body 42 is cast so that the indoor side surface 42b (41b), which is oriented towards the interior, is connected to the indoor side surface 2b of the exterior building material 2. In addition, in the main body casting step S42, the main body 42 is cast so that the outdoor side surface 42a of the main body 42 is located further outdoors than the indoor side surface 42b (41b). Furthermore, the main body 42 may be cast so that the side surface 42a of the main body 42 is located further outdoors than the outdoor end of the waterproof sealant 5, which will be described later. In the additional section casting step S44, as shown in Figure 10, the additional section 43 is cast so that the indoor side surface 43b of the additional section 43 is located on the outdoor side than the side surface 42a of the main body section 42. Also in the additional section casting step S44, the additional section 43 is cast so that the outdoor side surface 43a (41a), which is oriented towards the outdoors, is in the same second direction position as the outdoor side surface 2a of the exterior building material 2.

[0059] In the embodiment shown in Figure 10, the additional portion 43 is cast so that the upper end of the outdoor side surface 43a (41a) is lower than the lower surface 2c of the exterior building material 2. A second gap G2, which will be described later, is formed between the additional portion 43 and the exterior building material 2. In another embodiment, an additional portion 43 is cast so that the outdoor side surface 43a (41a) is connected to the outdoor side surface 2a of the exterior building material 2.

[0060] Furthermore, in the rising section concrete pouring step S40 (S42, S44), it is preferable to allow the waterproof mortar to harden for at least 24 hours. Hardening the waterproof mortar allows for smooth proceeding to the second waterproof membrane application step S50, the waterproof seal installation step S60, or the first waterproof membrane application step S70, which will be described later. Furthermore, it is preferable to allow a two-week curing period after the waterproof mortar has hardened.

[0061] In the embodiment shown in Figure 5, the second waterproofing membrane application step S50 is performed after the main body casting step S42 and before the additional part casting step S44. In the second waterproof membrane application step S50, as shown in Figures 9 and 10, the second waterproof membrane 20 is applied to the upper surface 31 of the support concrete 3 and the outdoor side surface 42a of the main body 42. Specifically, the second waterproof membrane 20 is applied to the entire side surface 42a of the main body 42, and the second waterproof membrane 20 is also applied to the upper surface 31 of the support concrete 3 so as to extend from the first gap G1 outwards. As described above, since the additional section 43 is poured after the second waterproofing membrane 20 is attached, at least a portion of the second vertical attachment section 22 of the second waterproofing membrane 20 is embedded between the side surface 42a of the main body section 42 and the side surface 43b of the additional section 43. Also, at least a portion of the second horizontal attachment section 21 of the second waterproofing membrane 20 is embedded between the additional section 43 and the support concrete 3. Therefore, water is less likely to penetrate into the interior from between the support concrete 3 and the vertical section 4, thus providing an exterior building material support structure 1 with improved waterproofing.

[0062] In one embodiment, a sheet-like material may be attached to the side surface 42a of the main body 42 as the second waterproof membrane 20. By using a sheet-like material as the second waterproof membrane 20, the second waterproof membrane 20 processed into the desired shape can be prepared in advance, so the attachment work of the second waterproof membrane 20 can be completed quickly. In other embodiments, a liquid waterproofing agent may be solidified on the side surface 42a of the main body 42 to form the second waterproofing membrane 20. By solidifying the liquid waterproofing agent to form the second waterproofing membrane 20, cracks in the main body 42, gaps between the exterior building material 2 and the main body 42, and gaps between the support concrete 3 and the main body 42 can be effectively filled. Therefore, the waterproofing and durability of the support structure 1 can be further improved.

[0063] In some embodiments, the rising section 4 is poured in the rising section pouring step S40 such that a second gap G2 is formed. Specifically, as shown in Figures 8 and 10, the rising section 4 (additional section 43) is cast so that the upper end of the outdoor side surface 41a (43a) of the rising section 4 (additional section 43) is lower than the lower surface 2c of the exterior building material 2, and includes a surface 41f (43f) extending inward from the upper end of the outdoor side surface 41a (43a). In other words, the rising section 4 (additional section 43) is cast so that the surface 41f (43f) of the rising section 4 (additional section 43) faces the lower surface 2c of the exterior building material 2 and is lower than the lower surface 2c of the exterior building material 2. Thus, a second gap G2 is formed between the lower surface 2c of the exterior building material 2 and the surface 41f (43f) of the rising section 4 (additional section 43). As shown in Figures 8 and 10, the second gap G2 opens outwards to the outside between the rising portion 4 (additional portion 43) and the exterior building material 2. In order to form the second gap G2, for example, a spacer that does not adhere to the waterproof mortar may be placed in the first gap G1, and the spacer may be removed after the waterproof mortar has hardened.

[0064] In the embodiments shown in Figures 8 and 10, the surface 41f (43f) of the rising portion 4 (additional portion 43) is oriented to incline downward as it faces the outdoors. As a result, the second gap G2 opens wider towards the outdoors, making it easier to place the waterproof seal 19, described later, in the second gap G2. In addition, water that enters the second gap G2 is more easily discharged to the outdoors through the second gap G2.

[0065] After casting the rising portion 4 (additional portion 43) so that the second gap G2 is formed, the waterproof seal installation step S60 is performed. In step S60, the waterproof seal installation step, the waterproof seal 19 is placed in the second gap G2, as shown in Figures 8 and 10. Specifically, the waterproof seal 19 is placed so that its side surface 19a is connected to the outdoor side surface 41a (43a) of the rising portion 4 (additional portion 43). As described above, since the waterproof seal 19 is placed in the second gap G2, water is less likely to penetrate into the interior from between the exterior building material 2 and the rising part 4 (main body part 42). Therefore, an exterior building material support structure 1 with improved waterproofing can be provided.

[0066] In one embodiment, a paste-like sealant may be filled into the second gap G2 and hardened to form a waterproof sealant 19 in the second gap G2. By using a paste-like sealant as the waterproof sealant 19, cracks that have formed in the rising portion 4 (additional portion 43) due to the drying shrinkage of the waterproof mortar, and gaps between the exterior building material 2 and the rising portion 4 (main body portion 42) can be effectively filled. Therefore, the waterproofness and durability of the support structure 1 can be further improved. In other embodiments, a solid sealant processed to the shape of the second gap G2 may be embedded in the second gap G2 as a waterproof seal 19. By using a solid sealant as the waterproof seal 19, the sealant processed to the shape of the second gap G2 can be prepared in advance, allowing the placement of the waterproof seal 19 to be completed quickly.

[0067] In some embodiments, as shown in Figures 4 and 5, the waterproof sealant installation step S20 is performed before the rising section concrete pouring step S40. In step S20, the waterproof sealant is installed on the support concrete 3 along the first direction, as shown in Figures 6 and 7. After installing the waterproof sealant 5, the rising section 4 (main body section 42) is poured, embedding the waterproof sealant 5 inside the rising section 4 (main body section 42). As a result, water is less likely to penetrate into the building from between the support concrete 3 and the rising section 4 (main body section 42), providing an exterior building material support structure 1 with improved waterproofing.

[0068] In one embodiment, the waterproof sealant 5 is installed such that its end in the first direction is in contact with the side surface 202 of the structure 200. By having the waterproof sealant 5 in contact with the side surface 202 of the structure 200, the space between the supporting concrete 3 and the rising section 4 can be waterproofed more effectively.

[0069] Furthermore, in the waterproof sealant installation step S20, as shown in Figures 6 and 7, the waterproof sealant 5 is installed in the range where the first gap G1 is formed in the second direction, which is a horizontal direction perpendicular to the first direction. That is, on the upper surface 31 of the support concrete 3, the waterproof sealant 5 is installed between the second direction position of the outdoor side surface 2a of the exterior building material 2 and the second direction position of the indoor side surface 2b. In the embodiments shown in Figures 6 and 7, the waterproof sealant 5 is installed on the outdoor side of the support members 7 (7A, 7B) in the second direction. When a worker constructs the support structure 1 from the outdoor side of the building, the installation of the waterproof sealant 5 can be easily performed. In addition, the waterproof sealant 5 can prevent water that has entered from the outdoor side from reaching the support members 7 (7A, 7B). In other embodiments, the waterproof sealant 5 may be installed on the indoor side of the support members 7 (7A, 7B) in the second direction.

[0070] In the embodiments shown in Figures 4 and 5, the waterproof sealant installation step S20 is performed after the support member fixing step S10 and before the exterior building material installation step S30. By installing the waterproof sealant 5 before attaching the exterior building material 2 to the support members 7 (7A, 7B), sufficient space is secured for the installation of the waterproof sealant 5, making it easy to install. In other embodiments, the waterproof sealant installation step S20 may be performed before the support member fixing step S10, or after the exterior building material installation step S30.

[0071] In some embodiments, a paste-like sealant may be applied to the upper surface 31 of the support concrete 3 and then hardened to install the sealant as a waterproof sealant 5. Thus, the waterproof sealant 5 can be easily installed. In other embodiments, the waterproof sealant 5 may be installed by attaching a solid sealant to the upper surface 31 of the support concrete 3 along the first direction on the support concrete 3. By using a solid sealant, a sealant processed into the desired shape can be prepared in advance as the waterproof sealant 5.

[0072] In some embodiments, the waterproof sealant 5 is installed so as to rise upward from the end 52 of the waterproof sealant 5 in the first direction. Specifically, as shown in Figure 2, the waterproof sealant 5 is installed on the upper surface 31 of the support concrete 3 along the first direction up to the side surface 202 of the structure 200, and then the waterproof sealant 5 is installed on the side surface 202 up to a height h'. Alternatively, the waterproof sealant 5 may be installed on the side surface 202 of the structure 200 from a height h' up to the upper surface 31 of the support concrete 3, and then the waterproof sealant 5 may be installed on the upper surface 31 along the first direction. As described above, since the waterproof sealant 5 (second part 53) is installed on the side surface 202 of the structure 200 up to a height h', even if water accumulates outside the building 9, it is possible to prevent water from entering the building from the outside.

[0073] The height h' rising from the end 52 of the waterproof sealant 5 preferably satisfies the condition 0.25 ≤ h' / H ≤ 1, where H is the distance between the upper surface 31 of the supporting concrete 3 and the lower surface 2c of the exterior building material 2. By satisfying the above condition, even if water accumulates outside the building 9, it is possible to more reliably prevent water from entering the building from the outside.

[0074] When a paste-like sealant is hardened to form the waterproof sealant 5, the sealant can be continuously applied to the upper surface 31 of the support concrete 3 and the side surface 202 of the structure 200. Alternatively, when a solid sealant is used as the waterproof sealant 5, a single piece of sealant can be continuously applied to the upper surface 31 of the support concrete 3 and the side surface 202 of the structure 200.

[0075] In some embodiments, the first waterproofing membrane application step S70 is performed after the concrete pouring step S40. In the first waterproof membrane application step S70, as shown in Figures 8 and 10, the first waterproof membrane 10 is applied to the outdoor side surface 41a (43a) of the rising section 4 (additional section 43). As a result, water is less likely to penetrate into the building from between the support concrete 3 and the rising section 4 (additional section 43), thus providing an exterior building material support structure 1 with improved waterproofing. In the embodiments illustrated in Figures 8 and 10, the upper end of the first waterproof membrane 10 is attached to the lower surface 2c of the exterior building material 2 at a height position.

[0076] In other embodiments, the first waterproof membrane 10 may be attached to the outdoor side surface 41a (43a) of the rising section 4 (additional section 43) and the outdoor side surface 2a of the exterior building material 2. The upper end of the first waterproof membrane 10 is attached at a height higher than the lower surface 2c of the exterior building material 2. Therefore, it becomes more difficult for water to penetrate into the interior from between the exterior building material 2 and the rising section 4 (additional section 43).

[0077] In the embodiments shown in Figures 8 and 10, the first waterproof membrane application step S70 is performed after the waterproof seal installation step S60. In this case, the first waterproof membrane 10 is applied to the outdoor side surface 41a (43a) of the rising portion 4 (additional portion 43) and the side surface 19a of the waterproof seal 19.

[0078] Furthermore, in the first waterproof membrane application step S70, as shown in Figures 8 and 10, the first waterproof membrane 10 may be applied not only to the outdoor side surface 41a (43a) of the rising section 4 (additional section 43) but also to the upper surface 31 of the support concrete 3. Since the first waterproof membrane 10 includes the first horizontal application section 11, water is less likely to penetrate into the building from between the support concrete 3 and the rising section 4 (additional section 43). In the embodiment shown in Figure 8, the first waterproof membrane 10 is directly attached to the upper surface 31 of the support concrete 3.

[0079] In the embodiment shown in Figure 10, the first waterproof membrane 10 is attached to the upper surface 31 of the support concrete 3 via the second horizontal attachment portion 21 of the second waterproof membrane 20. Therefore, water is less likely to penetrate between the additional portion 43 and the second horizontal attachment portion 21. In addition, since the second horizontal attachment portion 21 is covered by the first horizontal attachment portion 11, deterioration of the second waterproof membrane 20 due to exposure to sunlight and rainfall can be suppressed. Therefore, the waterproofing and durability of the exterior building material support structure 1 can be further improved.

[0080] In one embodiment, a sheet-like material may be attached to the outdoor side surface 41a as the first waterproof membrane 10. By using a sheet-like material as the first waterproof membrane 10, the first waterproof membrane 10 processed into the desired shape can be prepared in advance, so the attachment work of the first waterproof membrane 10 can be completed quickly. In other embodiments, the first waterproofing membrane 10 may be a film formed by solidifying a liquid waterproofing agent on the outdoor side surface 41a. By solidifying a liquid waterproofing agent to form the first waterproofing membrane 10, cracks in the rising portion 4, gaps between the exterior building material 2 and the rising portion 4 (additional portion 43), and gaps between the support concrete 3 and the rising portion 4 (additional portion 43) can be effectively filled. Therefore, the waterproofing and durability of the support structure 1 can be further improved.

[0081] The embodiments shown in Figures 1 to 10 are merely examples of the present disclosure. From a value engineering (VE) perspective, it is preferable to simplify the configuration of the support structure 1 as much as possible, within the range in which the support structure 1 can exhibit the required waterproofing performance. For example, the first waterproof membrane 10 and the second waterproof membrane 20 are not essential components of the exterior building material support structure 1, and these components may be omitted as appropriate. [Explanation of Symbols]

[0082] 1:Support structure (exterior building material support structure) 2:Exterior building materials 3: Supporting concrete 4: Upright section 5: Waterproof sealant 7: Support member 9: Building 10: 1st waterproofing membrane 19: Waterproof seal 20:Second waterproofing membrane 31:Top surface 41a: Outdoor side 41b: Indoor side 42: Main body 43: Additional section 51: 1st part 52: End 53:Second part 200 :Structure 202: Side view G1: First gap G2: Second gap

Claims

1. A construction method for an exterior building material support structure that supports exterior building materials that separate the interior and exterior of a building, A support member for supporting the exterior building material, comprising a support member fixing step for fixing the support member to the support concrete such that at least a portion of the support member extends upward from the support concrete, An exterior building material mounting step for attaching the exterior building material to the support member, A rising section pouring step is provided for pouring a rising section, which is formed of waterproof mortar, into the first gap between the support concrete and the exterior building material. Equipped with Construction method for supporting structures for exterior building materials.

2. When the direction in which the aforementioned rising portion extends is defined as the first direction, The system further includes a waterproof sealant installation step, which is performed on the support concrete along the first direction prior to the riser concrete pouring step. A method for constructing the exterior building material support structure described in claim 1.

3. The aforementioned waterproof sealant is A first portion is installed between the supporting concrete and the rising portion and extends along the first direction, A second portion rises from the end of the first portion in the first direction and extends along the side surface of an adjacent structure, including A method for constructing the exterior building material support structure according to claim 2.

4. In the aforementioned rising section casting step, the rising section is cast such that a second gap opening to the outside is formed between the rising section and the exterior building material. The system further includes a waterproof seal installation step for placing a waterproof seal in the second gap between the aforementioned rising portion and the aforementioned exterior building material. A method for constructing an exterior building material support structure according to any one of claims 1 to 3.

5. The aforementioned rising portion has an outdoor side surface that rises from the supporting concrete and is oriented toward the outdoors. The system includes a first waterproof membrane application step in which the first waterproof membrane is attached to the outdoor side surface. A method for constructing an exterior building material support structure according to any one of claims 1 to 3.

6. The aforementioned concrete pouring step for the rising section is, A main body casting step for casting the main body portion which rises from the aforementioned support concrete and has an indoor side surface oriented toward the interior, An additional section casting step for casting an additional section that rises from the aforementioned support concrete and has an outdoor side surface oriented toward the outdoors, Includes, Between the main body casting step and the additional part casting step, The system further includes a second waterproof membrane application step for applying a second waterproof membrane to the upper surface of the support concrete and the outdoor side surface of the main body. A method for constructing an exterior building material support structure according to any one of claims 1 to 3.

7. In the additional portion casting step, the additional portion is cast such that a second gap opening to the outside is formed between the additional portion and the exterior building material. The system further comprises a waterproof seal installation step for installing a waterproof seal in the second gap between the additional portion and the exterior building material. A method for constructing the exterior building material support structure according to claim 6.

8. The method further includes a first waterproof membrane application step of applying a first waterproof membrane to the outdoor side surface of the additional portion. A method for constructing the exterior building material support structure according to claim 6.

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