JP5034980B2 - Building construction method and formwork with joint members - Google Patents

Description

  The present invention relates to a building construction method and a formwork with joint members, and more particularly, to a construction method for a building in which joints are formed and a formwork with joint members used when constructing the building.

  Concrete has various factors that cause deformation such as temperature change due to heat of hydration of cement and outside air temperature, drying shrinkage, and unexpected external force, and these factors may cause cracks on the wall surface. If these cracks occur randomly on the wall surface, the aesthetics of the building will be impaired. Therefore, in general, a concrete building is provided with a joint for inducing a crack at a specific position on the wall surface.

  Also, in concrete buildings, joints for concrete (horizontal joints that separate the frames of each floor, or vertical joints in the division of the sections on each floor) have joints for jointing. It is recessed.

  Then, by filling the joints with the sealing material, cracks in the concrete and intrusion of moisture into the joint portions are prevented. Conventionally, joints are formed by nailing, for example, a wooden joint rod into a mold, and after the concrete is driven into a space formed using the mold, the mold and joint rod are removed from the concrete. It was. And the sealing material was filled in the formed joint.

  However, in this case, there is a problem that the joint rod needs to be removed from the mold or the sealing material needs to be filled, and the work becomes complicated. For example, filling the sealing material in the joints requires a high degree of skill, and it takes time and effort to achieve a beautiful finish. In addition, since the sealing material is deteriorated by ultraviolet rays or the like, there is a problem that it is necessary to replace the sealing material periodically.

  In view of this, a joint member that eliminates the need for removing the joint rod and applying the sealing material has been proposed (see, for example, Patent Document 1).

  FIG. 8 is a diagram showing a joint structure of a building using the joint member.

  The building shown in FIG. 8 includes concrete 310, a trapezoidal joint 305 recessed in the wall surface of the concrete 310, and a joint member 300 having a complicated outer shape. The joint member 300 includes a wall surface base material 301, a water-stop sheet 302, and a water-permeable joint material 303.

  The wall surface base material 301 is formed of a material having physical properties close to those of the concrete 310 and is disposed so as to form substantially the same plane as the wall surface of the concrete 310. The waterproof sheet 302 is fixed to the back surface of the wall surface base material 301. Non-vulcanized butyl rubber is used for the water stop sheet 302. The water permeable joint material 303 is fixed to the water stop sheet 302. This water-permeable joint material 303 is a material having water permeability with water absorption (for example, a continuous foam or an inorganic fiber material), and has an outer shape corresponding to the joint 305.

  With this configuration, the crack of the concrete 310 is induced at the joint 305 formation position, and the water stop function combining the water-stop sheet 302 and the water-permeable joint material 303 prevents water from entering the crack.

Patent Document 1 proposes to use a formwork with joint members when the concrete 310 is driven. In this mold with a joint member, provisional fastening means for temporarily fastening the joint member 300 to the mold is provided between the joint member 300 and the mold so that the joint member 300 is temporarily fastened to the mold. Has been. After the concrete 310 is driven, the formwork is removed from the concrete 310, and the joint member 300 is embedded in the concrete 310. For this reason, it is not necessary to remove the joint rod and to apply the sealing material.
Japanese Patent Laying-Open No. 2005-061178 (paragraph 0028)

  However, in the technique described in Patent Document 1, the water stop sheet 302 of the joint member 300 is set in a wider range than the joint 305 in consideration of the occurrence of the crack being shifted from the joint 305 as shown in FIG. It is necessary to arrange over. This complicates the outer shape of the joint member 300 as shown in FIG. 8, and the outer shape of the joint member 300 cannot be determined according to the joint 305 to be formed, and its size is larger than the size of the joint 305. There was a problem of becoming.

  In addition, because of this outer shape, for example, a crack may occur at the boundary between the wall surface base material 301 and the concrete 310, and in that case, the water stop sheet 302 and the water-permeable joint material 303 cannot stop the water. There was a problem.

Furthermore, the non-vulcanized butyl rubber constituting the waterstop sheet 302 has an adhesion strength with respect to the concrete 310 of about 1 kgf / cm ² , and does not have sufficient adhesion strength to prevent peeling from the concrete 310. For this reason, there exists a possibility that the water stop sheet | seat 302 may peel from the concrete 310 and there exists a possibility that water stop cannot be performed reliably.

  Further, in the above-described technique, it is necessary to provide temporary fixing means between the joint member 300 and the mold when forming the mold with the joint member. Here, as the temporary fixing means, for example, a double-sided tape can be considered. In this case, one surface of the double-sided tape is bonded to the mold surface. By using a double-sided tape, temporary fixing can be performed easily and inexpensively.

  However, depending on the material of the mold (for example, when the mold is made of wood), the adhesive strength of the double-sided tape to the mold is not sufficient. In particular, when a release material for facilitating demolding from the concrete 310 is applied to the surface of the mold, it becomes more difficult to obtain sufficient adhesion strength with a double-sided tape. Furthermore, when the surface of the formwork to be attached is wet with water such as rain, the adhesion strength of the double-sided tape to the formwork is reduced. For these reasons, the double-sided tape has a problem that the adhesive strength or adhesion strength necessary for temporary fixing cannot be obtained and temporary fixing cannot be performed reliably. Therefore, it is required to perform temporary fixing inexpensively and easily without using double-sided tape at the time of temporary fixing.

  The purpose of the present invention is to secure a temporary fastening of a joint member, which is a joint member having a smaller size than that of the conventional one, which is superior in water-stopping properties and has a high adhesion strength to concrete, to a formwork, inexpensively and easily. An object of the present invention is to provide a building construction method that can be performed and a formwork with joint members used in the construction method of the building.

  In order to achieve the above object, a construction method for a building according to the present invention is a construction method for a building, and includes a base material having an outer shape corresponding to a joint of a concrete wall surface, and the outer shape along the outer shape. Preparing a joint member comprising an ethylene vinyl acetate resin-based sheet disposed on a substrate and a notch formed on the substrate from the side opposite to the side on which the ethylene vinyl acetate resin-based sheet is disposed And a step of preparing an attachment member provided with a fastening member, a step of inserting the attachment member into the cutout portion of the joint member and temporarily joining the joint member, and the attachment using the fastening member. A step of fixing a member and a joint member temporarily joined to the mounting member to the mold, a step of driving concrete into a space formed using the mold, and removing the mold from the concrete Both , Characterized by comprising a step of removing the mounting member from the joint member.

  According to the building construction method of the present invention, a joint member is prepared in which both the base material and the ethylene vinyl acetate resin-based sheet have an outer shape corresponding to the joint of the concrete wall surface. The joint member does not have a complicated outer shape as a whole, and therefore the joint member is smaller than the conventional one. Moreover, since this joint member is provided with the ethylene vinyl acetate resin-type sheet | seat, it is excellent not only in the water-stopping property conventionally (for example, non-vulcanized butyl rubber) but also in the adhesiveness to concrete. Further, according to the present construction method, the joint member is inserted into the cutout portion of the joint member, temporarily joined to the joint member, and fixed to the mold using the fastening member included in the attachment member. Since the attached mold is formed, the joint member and the mold are temporarily fastened via the mounting member. Since the fastening member is used for the temporary fastening, the temporary fastening can be surely performed. Moreover, the handling of the fastening member at this time is simple. Furthermore, after the concrete is driven in, the attachment member is removed from the joint member, so that the attachment member can be reused. For this reason, there is no waste of an attachment member and temporary fixing can be performed at low cost.

  Moreover, in the construction method of the building, the step of temporarily joining the attachment member to the joint member includes a step of arranging an adhesive member that bonds the attachment member and the joint member at the notch portion. Is preferred. Thereby, temporary fixing of an attachment member and a joint member can be performed reliably. Further, by removing the adhesive member, the mounting member can be reliably reused.

  Moreover, in the construction method of the building, in the step of temporarily joining the attachment member to the joint member, it is preferable that a plurality of the attachment members are inserted into the notch portions.

  Thus, by using a plurality of attachment members, it is not necessary to arrange the attachment members in the entire region of the cutout portion of one joint member. For this reason, the volume of the attachment member which should be prepared decreases, and conveyance is easy. In addition, when an adhesive member is used at the time of temporary joining, the amount of the adhesive member used can be reduced.

  Moreover, in the construction method of the building, it is preferable that the fastening member is made of metal, and a portion of the mounting member excluding the fastening member is made of synthetic resin or wood. Thereby, the attachment member provided with the fastening member can be prepared inexpensively and easily.

  Moreover, in the construction method of the building, the base material is a cement-based base material, and the step of preparing the joint member is an outer shape corresponding to the shape of the notch portion at a position corresponding to the notch portion. A rod-shaped member having a structure is disposed, and the cement-based substrate is caused to flow between the rod-shaped member and the ethylene-vinyl acetate resin-based sheet. It is preferable to include a step of forming the notch portion of the joint member by removing the rod-shaped member from the cement-based substrate before the rod-shaped member is fixed to each other. Thereby, a joint member can be prepared easily. Moreover, since a rod-shaped member can be reused, a joint member can be prepared at low cost.

  Further, the formwork with joint members of the present invention includes a base material having an outer shape corresponding to a joint of a concrete wall surface, an ethylene vinyl acetate resin-based sheet disposed on the base material along the outer shape, A joint member provided with a cutout portion formed in the base material from the side opposite to the side on which the ethylene vinyl acetate resin-based sheet is disposed, a fastening member, and inserted into the cutout portion of the joint member. An attachment member temporarily joined to a joint member, and using the fastening member, the attachment member and a formwork to which the joint member temporarily joined to the attachment member is fixed.

  According to the formwork with joint member of the present invention, the joint member is complicated as a whole because both the base material and the ethylene vinyl acetate resin-based sheet have an outer shape corresponding to the joint of the concrete wall surface. Does not have a good outer shape. For this reason, the joint member is smaller than before. Moreover, since this joint member is provided with the ethylene vinyl acetate resin-type sheet | seat, it is not only excellent in water-stopping property than conventional (for example, non-vulcanized butyl rubber) but also has high adhesion strength to concrete. The attachment member is temporarily joined to the joint member in a state where the attachment member is inserted into the cutout portion of the joint member, and these are fixed to the mold using the fastening member of the attachment member. That is, the joint member and the formwork are temporarily fixed via the mounting member. Since the fastening member is used for the temporary fastening, the temporary fastening is surely performed. Moreover, the handling of the fastening member at this time is simple. Furthermore, since the attachment member is temporarily joined to the joint member, it is possible to remove the attachment member from the joint member after using the mold with joint member. For this reason, the attachment member can be reused. Therefore, there is no waste of the attachment member, and temporary fixing can be performed at low cost.

  According to the building construction method and the formwork with joint members of the present invention, the formwork of the joint member, which is a joint member that is smaller than the conventional one, has better water-stopping properties and higher adhesion strength to concrete than the conventional one. Can be securely and inexpensively and easily performed.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a partial enlarged cross-sectional view showing a schematic configuration of an outer peripheral wall of a building constructed by a building construction method according to an embodiment of the present invention.

  In the present embodiment, a building 1 as shown in FIG. 1 is constructed.

  This building 1 includes an outer peripheral wall 2 that stands in a vertical direction from the ground. A wall surface 2 a of the outer peripheral wall 2 shown in FIG. 1 is a surface perpendicular to the thickness direction of the outer peripheral wall 2 and is an outer surface of the building 1.

  The outer peripheral wall 2 is made of reinforced concrete, and the horizontal bars 3 and the vertical bars 4 are embedded in the concrete forming the frame of the outer peripheral wall 2. Furthermore, a hollow pipe 5 arranged along the vertical direction is embedded in the concrete, and a non-shrink mortar 6 is filled in the hollow portion of the pipe 5. The pipe 5 is made of a material that hardly has interface adhesion with concrete, and is made of, for example, vinyl chloride. The pipe 5 is bound to a plurality of horizontal bars 3 arranged in the vertical direction of the outer peripheral wall 2 by iron wire wires (not shown).

  Moreover, as shown in FIG. 1, the joint member 20 (refer FIG. 3) is embed | buried under the concrete along the vertical direction in the outer peripheral wall 2 so that a part may be exposed from the wall surface 2a (after-mentioned). The joint members 20 are arranged at equal intervals (for example, 3 m pitch) in the horizontal direction of the wall surface 2a. Since the joint member 20 is embedded in the concrete, a boundary surface is formed between them. The concrete side surface corresponding to this boundary surface is called joint 10. The joint 10 forms a long groove-like recess along the vertical direction on the wall surface 2a. Moreover, as shown in FIG.1 and FIG.3, the notch part 21b is formed in the joint member 20 at the wall surface 2a side. The notch 21b forms a long groove-like recess along the vertical direction on the wall surface 2a. The groove shape (recessed shape) of the joint 10 is an arc shape, and the groove shape (recessed shape) of the notch 21b is a trapezoidal shape. Thus, when the joint member 20 including the notch portion 21b is embedded at a position corresponding to the joint 10 in the outer peripheral wall 2, when a crack is generated in the concrete, the crack is the joint member 20 including the notch portion 21b. Be triggered towards. Moreover, in this outer peripheral wall 2, a crack is easy to be induced between the pipe 5 and the joint member 20 provided with the notch part 21b. This is because the interface between the pipe 5 and the concrete is hardly adhered, and therefore, in the portion where the pipe 5 is embedded, the dimension in the thickness direction of the outer peripheral wall 2 is smaller than the portion where the pipe 5 is not embedded. This is because it is thin.

  Then, the construction method of the building which concerns on this Embodiment is demonstrated.

  FIG. 2 is a flowchart (process diagram) showing a construction method for constructing the outer peripheral wall 2 of the building 1 shown in FIG.

  In FIG. 2, first, in step S10, the joint member 20 shown in FIG. 3 is prepared.

  As shown in FIG. 3, the joint member 20 has a substantially kamaboko-shaped cross-sectional shape composed of a flat surface and a curved surface. The joint member 20 includes a base material 21 and an ethylene vinyl acetate resin-based sheet (hereinafter referred to as “EVA sheet”) 22. The base material 21 has an outer shape corresponding to the joint 10 shown in FIG. The EVA sheet 22 is disposed on the base material 21 along the outer shape, and covers a part (curved surface) of the surface of the base material 21. That is, both the base material 21 and the EVA sheet 22 have an outer shape corresponding to the joint 10 of the wall surface 2a of the concrete. In the present embodiment, the shape of the joint 10, the outer shape of the base material 21 on the EVA sheet 22 side, and the outer shape of the EVA sheet 22 are arcuate.

  The substrate 21 is made of a cement-based substrate such as non-shrink grout or polymer cement mortar. The base material 21 has flat surfaces 21 a and 21 a (surfaces excluding a cutout portion 21 b described below) that are not covered with the EVA sheet 22. These surfaces 21 a and 21 a constitute substantially the same plane as the wall surface 2 a of the outer peripheral wall 2.

  In addition, a cutout portion 21 b is formed in the base material 21 along the longitudinal direction of the base material 21 on the side opposite to the side where the EVA sheet 22 is disposed. By forming the notch 21b in the base material 21, the base material 21 is easily broken. In the present embodiment, the shape of the notch 21b in the cross section of the base material 21 is a trapezoid that expands toward the outside.

  Here, an example of a preparation method (manufacturing method) of the joint member 20 in which the notch 21b is formed will be described.

  First, the EVA sheet 22 is placed in a mold having an outer shape corresponding to the joint 10. Subsequently, a rod-like member (not shown) having an outer shape (trapezoidal shape) corresponding to the shape of the notch 21b is disposed at a position corresponding to the notch 21b. Thereafter, a cement-based substrate constituting the substrate 21 is caused to flow between the rod-shaped member and the EVA sheet 22. Then, before the cement-based substrate and the rod-shaped member are fixed to each other as the cement-based substrate is cured, the rod-shaped member is removed from the cement-based substrate. By doing in this way, the joint member 20 in which the notch part 21b was formed can be prepared (manufactured) easily.

  By the way, at the time of manufacturing the joint member 20, if the rod-shaped member is taken out from the cement-based substrate without damaging the substrate 21 after the cement-based substrate (substrate 21) and the rod-shaped member are fixed to each other, It is conceivable to break the member. If the rod-shaped member is taken out without being damaged, the base material 21 may be damaged. However, according to the above-described method of forming the notch portion 21b, it is not necessary to break the rod-shaped member, so that the rod-shaped member can be reused. For this reason, the joint member 20 can be prepared at low cost. In addition, as long as the material which comprises a rod-shaped member is a material which is hard to adhere to a cementitious base material, what kind of material may be sufficient as it.

The EVA sheet 22 has excellent water blocking properties. For this reason, even if a crack occurs in the joint 10, it is possible to prevent water from entering the crack (water stop function of the joint member 20). Specifically, the EVA sheet 22 has a very high elongation and follows deformation due to cracks or the like. Furthermore, the EVA sheet 22 has a raised surface (both sides), and has higher adhesion strength to a cement-based substrate or the like than non-vulcanized butyl rubber. The adhesion strength to the cement-based substrate is 1 kgf / cm ² for non-vulcanized butyl rubber, and 9 kgf / cm ² for EVA sheet 22. Thus, by ensuring high adhesion strength to the EVA sheet 22, the water stop function of the joint member 20 can be reliably increased as compared with the case where non-vulcanized butyl rubber is used.

  Here, as described above, even if an unexpected external force is applied to the outer peripheral wall 2 of the building 1 by forming the notch portion 21b in the base material 21 and making the base material 21 easy to break, Then, the base material 21 is broken. For this reason, tearing of the EVA sheet 22 and peeling of the EVA sheet 22 from the concrete are less likely to occur. And even if the base material 21 fractures, the EVA sheet 22 can hold the fractured base material 21 while maintaining the state of adhering to the concrete, so that the water stop function of the joint member 20 is impaired. There is no.

  In the present embodiment, the notch is provided so that the base material 21 is reliably broken before the EVA sheet 22 is peeled off from the concrete forming the casing of the outer peripheral wall 2 and before the EVA sheet 22 is torn. The depth of the portion 21b (depth from the surface 21a) and the like are designed in advance.

  In the subsequent step S20, the attachment member 100 shown in FIGS. 4A and 4B is prepared.

  As shown in FIGS. 4A and 4B, the mounting member 100 includes a base 110 made of synthetic resin such as urethane foam and a metal fastening member 120. The base 110 corresponds to a portion of the mounting member 100 excluding the fastening member 120.

  The base 110 has a length in the longitudinal direction of, for example, 5 cm. Moreover, the cross-sectional shape of the base 110 is trapezoidal as shown in FIG. 4B, and is complementary to the shape of the notch 21b of the joint member 20. A through hole 111 is formed in the central portion of the base 110 in a direction perpendicular to the surface of the base 110. The through-hole 111 functions as a hole for fitting the fastening member 120, and has a large diameter portion 111a (for example, 12 mm in diameter) having a large diameter and a small diameter portion 111b having a small diameter communicating with the large diameter portion 111a. (For example, a diameter of 6.5 mm). The large diameter portion 111a of the through hole 111 is formed on the side opposite to the side on which the trapezoid formed by the cross section of the base 110 is expanded (see FIG. 4B).

  The fastening member 120 includes a bolt 121 composed of a head portion 121a and a shaft portion 121b, and a nut 122 that is screwed into a thread (not shown) formed on the shaft portion 121b of the bolt 121. The shaft 121b of the bolt 121 has a diameter of, for example, 6.5 mm and a length of, for example, 35 mm. In this embodiment, the nut 122 is a nut with a washer, but may not be one with a washer.

  The bolt 121 is inserted into the through-hole 111 from the surface side where the large-diameter portion 111a of the base 110 is present, and the head 121a is accommodated in the large-diameter portion 111a of the through-hole 111, while the shaft portion. 121b protrudes from the surface where the small diameter part 111b of the base 110 exists. It is preferable to use an adhesive so that the bolt 121 is firmly fixed to the base 110 when the bolt 121 is inserted into the through hole 111. Here, the head portion 121a of the bolt 121 does not protrude from the surface of the base 110. Therefore, the large diameter portion 111a of the through hole 111 has a space 130 as a space where the head portion 121a of the bolt 121 is not disposed. is there.

  In step S30, the attachment member 100 prepared in step S20 is temporarily joined to the joint member 20 prepared in step S10. Specifically, first, the temporary bonding adhesive member 140 is filled (arranged) in the space 130 of the mounting member 100 (see FIG. 6), and then the mounting member 100 is inserted into the cutout portion 21 b of the joint member 20. insert. Thereby, the attachment member 100 and the joint member 20 adhere | attach in the notch part 21b. Thus, provisional joining is completed. As the adhesive member 140, an indeterminate adhesive material having a high strength for adhering the base material 21 of the joint member 20 and the head 121 a of the bolt 121 of the mounting member 100 and having releasability that can be removed again. It is preferable to use it. Thereby, temporary fixing of an attachment member and a joint member can be performed more reliably. Further, the adhesive member 140 can be easily removed.

  At the time of provisional joining, a plurality of attachment members 100 are inserted into the notches 21b of one joint member 20, as shown in FIG. The plurality of attachment members 100 are temporarily joined to the joint member 20 at regular intervals (for example, 40 cm pitch). The attachment member 100 is also temporarily joined to both end portions in the longitudinal direction of the joint member 20. In the example shown in FIG. 5, the length of the joint member 20 in the longitudinal direction is 100 cm, one attachment member 100 is temporarily joined to the center portion of the joint member 20, and the two attachment members 100 and 100 are joint members. It is temporarily joined at a position 10 cm from one end of 20 and a position 10 cm from the other end. In this way, by using a plurality of attachment members 100, it is not necessary to arrange the attachment members 100 in the entire region of the cutout portion 21b of the single joint member 20. For this reason, since the volume of the attachment member 100 to be prepared is reduced, transportation and the like are easy. Moreover, the usage-amount of the adhesive member 140 used in the temporary joining can be reduced.

  Next, in step S40, the joint member 20 is fixed to a mold frame 200 (see FIG. 6) as a barrier plate. As the formwork 200, it is preferable to use a plywood panel (wooden) such as a veneer plywood. Thereby, the formwork 200 can be prepared inexpensively. More preferably, the surface of which a release material for facilitating the removal of the poured concrete is applied is used.

  The fastening member 120 of the mounting member 100 is used to fix the joint member 20 to the mold 200. Therefore, a hole is formed in the mold 200 at a position where the joint 10 is formed on the outer peripheral wall 2 and corresponding to the bolt 121 of the mounting member 100. Then, the shaft part 121b of the bolt 121 is inserted into this hole, and the mold 122 is tightened by screwing the nut 122 from the opposite side of the mold frame 200. Thereby, the attachment member 100 and the joint member 20 temporarily joined to the attachment member 100 are fixed to the mold frame 200. In this way, the mold 200 with the joint member 20 is formed.

  FIG. 6 is a partially enlarged cross-sectional view showing a state when the joint member 20 is fixed to the mold frame 200 in step S40 of FIG.

  As shown in FIG. 6, by using a nut 122 with a washer, the mold 200 can be efficiently tightened. Further, by providing a space 131 between the mold frame 200 and the base 110 of the mounting member 100, the mold frame 200 and the joint member 20 (surfaces 21a, 21a) are closely attached when the mold frame 200 is tightened. Increases nature.

  And the housing of the outer peripheral wall 2 is constructed (steps S50 to S70). Specifically, as shown in FIG. 7A, the above-described mold form 200 with the joint member 20 or the form form 200 ′ to which the joint member 20 is not attached is installed (step S50). , 200 ′, concrete (cement base material) is driven into the space (step S60; see FIG. 7B), and after the concrete has hardened, it is demolded (step S70). Demolding is completed by first removing the nut 122 from the bolt 121, subsequently removing the molds 200, 200 ′ from the concrete, and then removing the mounting member 100 from the joint member 20. When installing the molds 200 and 200 ′ in step S50, the pipe 5 filled with the horizontal stripes 3, the horizontal stripes 4 and the non-shrink mortar 6 and the separator for supporting the molds 200 and 200 ′ are used. And supporting work (not shown) are also arranged at predetermined positions. At this time, the pipe 5 is bound to the horizontal bar 3 by an iron wire.

  Here, the attachment member 100 is detached from the joint member 20 so as to scrape (squeeze) the attachment member 100 from the cutout portion 21b. The reason why it can be easily removed in this way is, first, the use of the adhesive member 140 having peelability at the time of temporary joining, and second, the shape of the notch 21b on the outside (on the formwork 200 side). There is a trapezoid that expands as you go. That is, the attachment member 100 is easily detached from the joint member 20. On the other hand, the joint member 20 is firmly joined to the concrete due to the high adhesion strength of the EVA sheet 22. For this reason, the joint member 20 does not fall off from the concrete during mold removal.

  And when the adhesive member 140 used in the temporary joining remains in the cutout portion 21b of the joint member 20, it is removed. Since the adhesive member 140 has a peelable property, the base material 21 of the joint member 20 is not damaged when the adhesive member 140 is removed.

  The state after demolding is as shown in FIG. That is, the outer peripheral wall 2 as shown in FIG. 1 is constructed as a part of the building 1 through the steps described above. Moreover, the building 1 is constructed | assembled by constructing parts (not shown) other than the outer peripheral wall 2.

  As explained in detail above, according to the construction method of the building 1 (outer peripheral wall 2), in step S10, both the base material 21 and the EVA sheet 22 have an outer shape corresponding to the joint 10 of the concrete wall surface 2a. The joint member 20 is prepared. The joint member 20 does not have a complicated outer shape as a whole, and therefore the joint member 20 is smaller than the joint member having a complicated outer shape. Further, since the joint member 20 includes the EVA sheet 22, it has higher adhesion strength to the cement-based base material constituting the concrete and excellent water-stopping properties than conventional (eg, non-vulcanized butyl rubber).

  Moreover, according to this construction method, the attachment member 100 in which the notch portion 21b is formed is prepared in step S10, and the attachment member 100 is inserted into the notch portion 21b of the joint member 20 in step S30. In step S40, these are fixed to the mold 200 using the fastening member 120 included in the mounting member 100, whereby the mold 200 with the joint member 20 is formed. That is, the joint member 20 and the formwork 200 are temporarily fixed via the attachment member 100. Since the fastening member 120 is used for the temporary fastening, the temporary fastening can be reliably performed. Further, the handling of the fastening member 120 at this time is simple.

  Furthermore, according to this construction method, in step S70 after the concrete is driven, the attachment member 100 is removed after the molds 200 and 200 'are removed. Therefore, the attachment member 100 can be reused. For this reason, there is no waste of the attachment member 100, and the temporary fixing can be performed at a low cost. In order to reliably reuse the attachment member 100, the adhesive member 140 remaining in the space 130 may be removed.

  Therefore, the construction method described above is the joint member 20 that is smaller than the conventional joint member, and is superior to the conventional waterproofing and has a high adhesion strength to the concrete, and the temporary fastening to the formwork 200 is ensured. Moreover, it can be carried out inexpensively and easily.

  Moreover, according to this construction method, the fastening member 120 is used in the temporary fastening. For this reason, at the time of temporary fastening, it is not necessary to arrange an adhesive with a double-sided tape or the like between the mold 200 and the joint member 20, that is, on the surfaces 21 a and 21 a of the joint member 20 in contact with the mold 200.

  In addition, when only the adhesive (for example, double-sided tape) is used for the temporary fixing and the fastening member 120 is not used, the following problems occur. First, sufficient adhesive strength cannot be obtained because the formwork 200 is made of wood or because of the release material applied to the surface of the formwork 200. Second, since the adhesive cannot be used when the surface of the mold 200 is wet, for example, when it rains, it is necessary to arrange the adhesive in a large indoor space that can accommodate the mold 200. bad. Thirdly, when an adhesive (particularly thick double-sided tape) is used, the joint member 20 may be misaligned in the mold 200, and as a result, the joint 10 may be misaligned on the wall surface 2a. is there. On the other hand, since this construction method uses the fastening member 120, the temporary fastening can be surely performed regardless of the surface state of the mold 200. For this reason, there is no possibility that the mold 200 is dropped during the concrete driving. Furthermore, even when it is raining, the temporary fixing work can be performed outdoors and the workability is high. Moreover, since the fastening member 120 is used, the position of the joint member 20 is not easily displaced, and therefore, the joint 10 is not easily misplaced.

  Moreover, according to this construction method, since the attachment member 100 and the joint member 20 are temporarily joined, the removal of the attachment member 100 from the joint member 20 is a work of a spasm degree, and the attachment member 100 is removed. Is simple. For this reason, there is little labor after removing the molds 200 and 200 '. Further, according to the present construction method, the amount of use of the adhesive member 140 only corresponds to the volume of the space 130 provided in the mounting member 100, and therefore it can be reduced. Furthermore, even in the case where the attachment member 100 is temporarily joined to the joint member 20 indoors, for example, in the case of rain, the joint member 20 is smaller than the mold frame 200, so that the indoor space may be small.

  In the construction method of the building 1 (outer peripheral wall 2) described above, in step S70, the nut 122 is removed from the bolt 121, and then the formwork 200 is removed, and the attachment member 100 is removed. However, the attachment member 100 may be removed together with the mold frame 200 without removing the nut 122 from the bolt 121. Thereby, the removal of the attachment member 100 becomes easier, and the trouble at the time of mold removal is further reduced.

  In the above-described embodiment, the base material 21 of the joint member 20 is composed of a cement-based base material, but is not limited to a cement-based base material. However, since the cement-based substrate has curability, the joint member 20 to which the EVA sheet 22 and the cement-based substrate are firmly attached can be manufactured using the curability. Easy to prepare.

  Further, the base 110 of the mounting member 100 is made of synthetic resin, but is not limited to synthetic resin, and may be, for example, wooden. The material constituting the base 110 is preferably a material that can be obtained at low cost and that can be easily processed, such as synthetic resin or wood. Thereby, the attachment member 100 can be prepared inexpensively and easily.

  Furthermore, the number of through holes 111 formed for fitting the bolts 121 into the base 110 of the mounting member 100 is not limited to one and may be plural. In this case, it is preferable to prepare a long base 110. And the elongate attachment member provided with the several volt | bolt 121 is prepared. By using such a long attachment member, the joint member 20 can be more firmly fixed to the mold frame 200. It is also possible to manufacture a plurality of attachment members 100 including one bolt 121 by cutting the long attachment member.

  Moreover, although the shape of the joint 10, the outer shape of the EVA sheet 22 side of the base material 21, and the outer shape of the EVA sheet 22 are arcuate, they are not limited to arcuate. For example, a semi-elliptical shape or a U-shape may be used instead of the arc shape.

  Furthermore, although the shape of the notch 21b is a trapezoid, it is not limited to a trapezoid, and may be a rectangle, for example. Moreover, it is preferable to form so that the dimension of the width direction perpendicular | vertical to the longitudinal direction of the notch part 21b may become small. Thereby, in the building 1, the area which the notch part 21b exposes as a recessed part decreases, and the design property when it sees from the wall surface 2a side of the building 1 increases.

  In the above-described embodiment, the wall surface 2a may be surface-finished. Surface finish includes paint finish. Further, as the surface finish, the notch 21b may be filled with a low-strength mortar, a sealing material (resin or vinyl chloride) or the like.

  Moreover, in embodiment mentioned above, although the combination of the bolt 121 and the nut 122 was used as the fastening member 120, it is not restricted to this combination. For example, a pin or a rivet may be used as the fastening member 120.

  In the above-described embodiment, the case where the joint 10 is formed in the vertical direction has been described. However, the direction in which the joint 10 is formed is not limited to the vertical direction, and for example, intersects the horizontal direction or the horizontal direction. It may be a direction. Further, in the joint member 20, the notch portion 21 b may not be formed in the base material 21.

  In the above-described embodiment, the joint 10 is formed on the wall surface 2a among the surfaces of the outer peripheral wall 2. However, the joint 10 may be formed on the wall surface facing the wall surface 2a. In the above-described embodiment, the pipe 5 is embedded in the concrete of the outer peripheral wall 2, but it is not always necessary to embed it. Although the outer peripheral wall 2 is made of reinforced concrete, it may be made of concrete without the horizontal bars 3 and the vertical bars 4 instead.

  Moreover, although embodiment mentioned above demonstrated the case where the outer peripheral wall 2 of the building 1 was constructed | assembled, this invention is not limited to the case where an outer peripheral wall is constructed, and is a concrete building. It is applicable when constructing a building that is a thing and has joints.

  The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

It is a partial expanded sectional view which shows the schematic structure of the outer peripheral wall of the building constructed | assembled by the construction method of the building which concerns on embodiment of this invention. It is a flowchart (process drawing) which shows the construction method for constructing the outer peripheral wall of the building shown in FIG. It is a perspective view which shows the structure of the joint member prepared in step S10 of FIG. It is sectional drawing which shows the structure of the attachment member prepared in step S20 of FIG. 1, (a) is sectional drawing which follows the longitudinal direction of an attachment member, (b) is perpendicular | vertical to the longitudinal direction of an attachment member. It is sectional drawing which follows a direction. It is a front view which shows a state when an attachment member is temporarily joined to the joint member in step S30 of FIG. It is a partial expanded sectional view which shows a state when a joint member is fixed to a formwork in step S40 of FIG. It is sectional drawing for demonstrating the state in step S50-S60 of FIG. 1, (a) is sectional drawing which shows states, such as an installed formwork, (b) is the state after concrete pouring. It is sectional drawing shown. It is a partial expanded sectional view which shows the schematic structure of the outer peripheral wall of the conventional building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Outer peripheral wall 2a Wall surface 3 Horizontal bar 4 Vertical bar 10 Joint 20 Joint member 21 Base material 21a Surface 21b Notch 22 Ethylene vinyl acetate resin type sheet (EVA sheet)
100 Mounting member 110 Base 111 Through hole 111a Large diameter portion 111b Small diameter portion 120 Fastening member 121 Bolt 121a Head portion 121b Shaft portion 122 Nut 130, 131 Space 140 Adhesive member 200, 200 'Formwork

Claims (6)

A construction method for a building,
A base material having an outer shape corresponding to the joint of the concrete wall surface, an ethylene vinyl acetate resin-based sheet disposed on the base material along the outer shape, and a side on which the ethylene vinyl acetate resin-based sheet is disposed; Preparing a joint member provided with a notch formed in the base material from the opposite side;
Preparing an attachment member with a fastening member;
Inserting the attachment member into the cutout portion of the joint member and temporarily joining the joint member;
Using the fastening member, fixing the attachment member and the joint member temporarily joined to the attachment member to a mold frame;
Placing concrete into the space formed using the mold, and
Removing the mold from the concrete, and removing the attachment member from the joint member;
The construction method of the building characterized by having provided. The step of temporarily joining the attachment member to the joint member includes the step of disposing an adhesive member that adheres the attachment member and the joint member at the cutout portion.
The building construction method according to claim 1, wherein:   The construction method according to claim 1 or 2, wherein in the step of temporarily joining the attachment member to the joint member, a plurality of the attachment members are inserted into the cutout portions.   The building according to any one of claims 1 to 3, wherein the fastening member is made of metal, and a portion of the mounting member excluding the fastening member is made of synthetic resin or wood. Construction method. The substrate is a cement-based substrate,
The step of preparing the joint member includes
A bar-shaped member having an outer shape corresponding to the shape of the notch is disposed at a position corresponding to the notch,
Between the rod-shaped member and the ethylene vinyl acetate resin-based sheet, the cement-based substrate is allowed to flow,
Before the cement-based substrate and the rod-shaped member are fixed to each other as the cement-based substrate is cured, the rod-shaped member is removed from the cement-based substrate,
Including the step of forming the cutout portion of the joint member.
The construction method for a building according to any one of claims 1 to 4, wherein the construction method is characterized. A base material having an outer shape corresponding to the joint of the concrete wall surface, an ethylene vinyl acetate resin-based sheet disposed on the base material along the outer shape, and a side on which the ethylene vinyl acetate resin-based sheet is disposed; Is a joint member provided with a notch formed in the base material from the opposite side;
A fastening member, and a mounting member that is inserted into the cutout portion of the joint member and temporarily joined to the joint member;
Using the fastening member, the mounting member, and a mold frame on which the joint member temporarily joined with the mounting member is fixed,
A mold with a joint member, characterized by comprising:

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