Construction method of concrete structure

Abstract

To provide a construction method of a concrete structure that can significantly shorten a construction period of a concrete structure.SOLUTION: A construction method of a concrete structure includes: a formwork installation step of installing an outer formwork that surrounds a first area corresponding to a foundation of a building and a second area corresponding to an ancillary structure of the building; a partition member installation step of installing a synthetic resin partition member at a boundary between the first area and the second area; a pouring step of pouring concrete into the first area and the second area; and a formwork removal step of removing the outer formwork when the concrete poured in the pouring step reaches a predetermined hardness.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for constructing a concrete structure, and more particularly to a method for constructing a concrete structure in which a foundation portion of a building and an auxiliary structure provided adjacent to the foundation portion are formed from concrete. [Background technology]

[0002] In a typical house, an auxiliary structure such as a front porch is provided adjacent to the foundation of the building. When constructing a front porch, concrete is first poured into the foundation, and the formwork for the foundation is removed after the concrete has hardened. Next, concrete is poured into the area that will become the front porch, and the formwork is removed after the concrete has hardened. As such, work involving pouring concrete requires a large number of man-hours, so various methods are used to reduce the number of man-hours.

[0003] For example, Patent Document 1 discloses a method for constructing an earthen floor that can easily construct an earthen floor concrete for an entrance or the like. According to this construction method, a rectangular concrete box produced in a factory is prepared, and this rectangular box is placed on the ground with its bottom facing up, and the placed rectangular box is fixed to a slab on the main body of the building. An earthen floor for the entrance is obtained by pouring earthen floor concrete to a certain thickness on the top surface of the rectangular box. Instead of attaching concrete blocks along the perimeter of the earthen floor, it is only necessary to simply place the factory-produced concrete rectangular box on the ground, which makes the construction work for an earthen floor for the entrance or the like extremely simple. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-241098 A Summary of the Invention [Problem to be solved by the invention]

[0005] The configuration described in the above Patent Document 1 relates to a technique for improving work efficiency when pouring concrete for the entrance floor. Since the process of constructing the entrance floor, etc., as a separate work process from the foundation, cannot be eliminated, there is a need to further improve the efficiency of the work process.

[0006] Therefore, an object of the present invention is to provide a method for constructing a concrete structure that can significantly shorten the construction period of the concrete structure. [Means for solving the problem]

[0007] In response to the above-mentioned problems, the present invention provides a method for constructing a concrete structure in which a foundation portion of a building and an accessory structure adjacent to the foundation portion are formed from concrete, the method comprising: a formwork installation process for installing an outer formwork surrounding a first area corresponding to the foundation portion and a second area corresponding to the accessory structure; a partition member installation process for installing a synthetic resin partition member at the boundary between the first area and the second area; a pouring process for pouring concrete into the first area and the second area; and a formwork removal process for removing the outer formwork when the concrete poured in the pouring process reaches a predetermined hardness.

[0008] Here, in the formwork removing step, it is preferable to remove a portion of the partition member that is not embedded in the concrete poured in the concrete pouring step. Also, in the pouring step, it is preferable to pour concrete in the second area after pouring concrete in the first area.

[0009] It is also preferable that a support member having a vertical portion extending vertically and a horizontal portion extending horizontally from the upper end of the vertical portion is attached to the upper end side of the partition member. Furthermore, it is preferable that a connecting member connected to the outer formwork is attached to the side of the partition member, and the connecting member has a first connecting portion fixed to the partition member and a second connecting portion protruding from the first connecting portion and fixed to the outer formwork, and the first connecting portion and the second connecting portion are joined together. Effect of the Invention

[0010] In this way, the method of constructing a concrete structure of the present invention involves pouring concrete into the first area corresponding to the foundation and the second area corresponding to the auxiliary structure, with a synthetic resin partition member installed at the boundary between the first area and the second area corresponding to the auxiliary structure.

[0011] This means that the concrete only needs to be poured once, significantly shortening the construction period for a concrete structure.

[0012] In particular, in the formwork removal process, it is only necessary to remove the portions of the partition members that are not embedded in the concrete poured in the concrete pouring process; there is no need to remove the portions that are embedded in the concrete, making it possible to construct the concrete structure easily.

[0013] Furthermore, in the pouring process, by pouring concrete into the first area and then pouring concrete into the second area, it is possible to prevent the formwork from protruding from the outdoor side to the indoor side.

[0014] In addition, a support member having a vertical portion extending vertically and a protruding portion protruding horizontally from the upper end of the vertical portion is attached to the upper end of the partition member. This allows components such as anchor rulers required for the construction of concrete structures to be placed on the upper end side of the partition member.

[0015] A connecting member that is connected to the outer formwork is attached to the side of the partition member, and the connecting member has a first connecting part that is fixed to the partition member and a second connecting part that protrudes from the first connecting part and is fixed to the outer formwork, and the first connecting part and the second connecting part are joined together. This makes it possible to firmly fix the partition member to the outer formwork. [Brief description of the drawings]

[0016] [Figure 1] 1 is a plan view of the overall structure of a formwork used in a concrete structure construction method according to an embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a perspective view showing a formwork installation process and a partition member installation process according to an embodiment of the present invention. [Diagram 3] 13 is an enlarged view showing a connecting portion between the partition member and the outer formwork. FIG. [Figure 4] FIG. 2 is a perspective view showing a casting process according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a perspective view showing the entire concrete structure after the formwork removal process is completed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The concrete structure construction method according to the embodiment of the present invention is a method for forming a foundation part of a building and an accessory structure adjacent to the foundation part with concrete, and is a construction method for forming a concrete structure by pouring concrete into a formwork installed around the foundation part and into a formwork installed around the accessory structure. In the following, explanation and illustration of the reinforcing bars installed in the formwork will be omitted.

[0018] Fig. 1 is a plan view of the overall structure of a formwork used in a construction method according to an embodiment. The formwork is composed of an outer formwork 100 (the part shown by the upper left diagonal line in Fig. 1) that is installed so as to surround the foundation part and the part adjacent to the foundation part that will become an auxiliary structure, and an inner formwork 110 (the part shown by the upper right diagonal line in Fig. 1) that is installed inside the outer formwork 100.

[0019] The outer formwork 100 is installed so as to integrally surround the foundation of the building and the auxiliary structures provided adjacent to the foundation. In other words, the outer formwork 100 is installed on the periphery of the building so as to define the space that will become the living space and the space that will become the entrance porch. The inner formwork 110 is installed at a distance inside the outer formwork 100.

[0020] In the following description, the area surrounded by the inner formwork 110 is referred to as the inner area A11, the area between the outer formwork 100 and the inner formwork 110 is referred to as the rising area A12, and the area consisting of the inner area A11 and the rising area A12 is referred to as the first area A1. The area in which the auxiliary structure is formed is referred to as the second area A2. A partition member 10 (the part indicated by dots in FIG. 1) is installed at the boundary between the first area A1 and the second area A2.

[0021] 2 is a perspective view showing a formwork installation step and a partition member installation step. In the formwork installation step, an outer formwork 100 is installed to surround a first area A1 where a foundation portion is to be formed and a second area A2 where an auxiliary structure is to be formed.

[0022] The outer formwork 100 is installed so as to integrally surround the area that will become the living space and the area that will become the entrance porch. The outer formwork 100 is, for example, a steel formwork constructed by joining together a number of rectangular metal steel plates, but may also be a wooden formwork. The boundary between the first area A1 and the second area A2 is a location where the outer formwork 100 is not installed.

[0023] The inner formwork 110 is installed inside the outer formwork 100 in the first area A1 at a distance S. The inner formwork 110 is a steel formwork made by joining together a plurality of rectangular metal steel plates like the outer formwork 100, but may also be a wooden formwork. The inner formwork 110 is installed so as to be at approximately the same height as the outer formwork 100.

[0024] In the partition member installation process, a synthetic resin partition member 10 is installed at the boundary between the first area A1 and the second area A2. Specifically, the portion that separates the rising area A12 and the second area A2 is an opening portion where neither the outer formwork 100 nor the inner formwork 110 is installed. To cover this opening portion, the partition member 10 is installed as shown in FIG.

[0025] The partition member 10 is a flat member formed in a rectangular shape, and is formed to have approximately the same dimensions as the interrupted portion of the outer formwork 100. As shown in Figure 2, the partition member 10 is installed continuous with the outer formwork 100, and has approximately the same height as the outer formwork 100.

[0026] The partition member 10 is made of synthetic resin such as PVC, PP, FRP, etc. By making the partition member 10 from synthetic resin, it is possible to prevent the intrusion of termites and the like into the room (termite prevention function) and to improve durability. In addition, by making the partition member 10 from synthetic resin, it becomes easier to process the partition member 10, such as by cutting it.

[0027] Fig. 3 is an enlarged view of the connection portion between the partition member 10 and the outer formwork 100. As shown in Fig. 3, a support member 30 is attached to the upper end of the partition member 10. The support member 30 is configured to have a vertical portion 31 extending in the vertical direction and a protruding portion 32 protruding horizontally from the upper end of the vertical portion 31. The protruding portion 32 is positioned so as to be at the same height as the upper end of the partition member 10.

[0028] The vertical portion 31 is formed in a flat plate shape, and the support member 30 is fixed to the partition member 10 by fastening the vertical portion 31 with a screw to the outdoor side surface of the partition member 10. The support member 30 has a flat protruding portion 32 extending horizontally, so that a tool used during installation, such as an anchor ruler, can be placed on the protruding portion 32.

[0029] 3, a connecting member 40 that connects to the outer formwork 100 is attached to the side of the partition member 10. The connecting member 40 has a first connecting portion 41 that is fixed to the partition member 10, and a second connecting portion 42 that protrudes from the first connecting portion 41 and is fixed to the outer formwork 100.

[0030] The first connecting portion 41 is fixed to the outdoor side surface of the partition member 10 by screws, similar to the vertical portion 31. The second connecting portion 42 is formed to have the same thickness as a web 101 protruding from the outer formwork 100 to the outdoor side. The second connecting portion 42 and the web 101 are connected by a U-shaped fastener 102.

[0031] Here, the combined dimension of the width of the partition member 10 and the protruding dimension of the connecting member 40 is formed to be approximately the same as the protruding dimension of the web 101. Therefore, the connecting member 40 and the outer formwork 100 can be easily joined by the U-shaped fastener 102.

[0032] Fig. 4 is a perspective view showing the pouring step, and Fig. 5 is a perspective view showing the entire concrete structure 200 after the formwork removal step is completed. In the pouring step, concrete is poured into the first area A1 and the second area A2. Specifically, concrete is poured into the inner area A11 surrounded by the inner formwork 110, the rising area A12 sandwiched between the outer formwork 100 and the inner formwork 110, and the second area A2 surrounded by the outer formwork 100 and the partition member 10. The amount of concrete poured is adjusted so that the height of the concrete poured into the inner formwork 110 is lower than the gap S.

[0033] Here, in the pouring step, it is preferable to pour concrete into the first area A1 and then into the second area A2. If concrete is poured into the first area A1 after pouring into the second area A2, the lateral pressure during pouring may cause the formwork to bulge from the outdoor side to the indoor side. Therefore, in order to prevent bulging from the outdoor side to the indoor side, concrete is poured into the first area A1 and then into the second area A2.

[0034] In the pouring step, it is desirable to pour concrete into the first area A1 and the second area A2 at the same time. The "same timing" does not strictly mean pouring concrete into the first area A1 and the second area A2 at the same time, but means completing pouring of concrete into both areas within a short period of time so that the concrete poured into the first area A1 and the second area A2 hardens without any time difference. For example, it is desirable to pour concrete into the second area A2 within a certain period of time before the concrete poured into the first area A1 hardens.

[0035] In the formwork removal process, the outer formwork 100 and the inner formwork 110 are removed when the concrete poured in the pouring process reaches a predetermined hardness. Specifically, after the concrete poured in the pouring process hardens, the outer formwork 100 and the inner formwork 110 are dismantled and removed when the concrete reaches a predetermined hardness.

[0036] In the casting step, concrete is cast into the first area A1 and the second area A2 with the partition member 10 placed between them, so that the concrete in the base portion 201, the rising portion 202, and the attached portion 210 harden at approximately the same time. Therefore, the outer formwork 100 and the inner formwork 110 can be removed at approximately the same time.

[0037] Here, in the formwork removal step, it is desirable to remove the portion of the partition member 10 that is not embedded in the concrete poured in the concrete pouring step. That is, the contact portion 10a of the partition member 10 that is in contact with the concrete poured in the second region A2 is left, and the other non-contact portion 10b is removed together with the outer formwork 100 and the inner formwork 110. For example, when a staircase is to be formed in the entrance porch, the partition member 10 may be cut according to the step of the staircase.

[0038] As shown in Fig. 5, the concrete structure 200 has a base portion 201 on the indoor side and a rising portion 202 around it. Also, on the outdoor side, it has an attached portion 210. Furthermore, the partition member 10 remains installed between the rising portion 202 and the attached portion 210 without being removed.

[0039] The base plate portion 201 is a portion constructed by the hardening of concrete poured inside the inner formwork 110 in the first area A1 in the pouring process. The rising portion 202 is a portion constructed by the hardening of concrete poured into the gap S formed between the outer formwork 100 and the inner formwork 110 in the first area A1 in the pouring process. The attached portion 210 is a portion constructed by the hardening of concrete poured into the second area A2 surrounded by the outer formwork 100 and the partition member 10 in the pouring process.

[0040] When forming a conventional concrete structure, first concrete is poured into a formwork for the foundation that is set up to match the area that will become the foundation of the building, then the formwork for the foundation is removed, and concrete is poured into a formwork for the accessory structure that is set up to match the space that will become the accessory structure, and then the formwork is removed. In addition, there are two processes involved, and unused concrete (remaining concrete) is generated.

[0041] On the other hand, in the method of constructing a concrete structure according to the embodiment, a concrete structure 200 is obtained through a formwork installation process in which an outer formwork 100 is installed to surround the first area A1 corresponding to the foundation and the second area A2 corresponding to the ancillary structure, a partition member installation process in which a synthetic resin partition member 10 is installed at the boundary between the first area A1 and the second area A2, a pouring process in which concrete is poured into the first area A1 and the second area A2, and a formwork removal process in which the outer formwork 100 is removed when the concrete poured in the pouring process reaches a predetermined hardness.

[0042] As a result, the concrete only needs to be poured once, which significantly shortens the construction period of a concrete structure. In addition, the amount of leftover concrete can be reduced because the concrete only needs to be poured once. This allows for efficient use of concrete and prevents adverse environmental effects.

[0043] In addition, since the partition member 10 is made of synthetic resin, it is possible to prevent the intrusion of termites and the like into the interior of the building (termite prevention function) and to improve durability. In addition, since the partition member 10 is made of synthetic resin, it is possible to easily cut the partition member 10 in the formwork removal process. Therefore, it is possible to easily remove the partition member 10 that is not embedded in the concrete poured in the concrete pouring process. As a result, a part of the partition member 10 remains embedded in the concrete at the boundary between the first area A1 and the second area A2, which makes it possible to prevent the concrete of the foundation and the concrete of the auxiliary structure from becoming integrated together.

[0044] In the formwork removal process, the portion of the partition member 10 that is not embedded in the concrete poured in the concrete pouring process is removed. That is, the portion of the partition member 10 that is embedded in the poured concrete can remain embedded, which simplifies the formwork removal process.

[0045] In addition, in the pouring process, concrete is poured into the first area A1 and then into the second area A2, which prevents the formwork from bulging out due to the lateral pressure of the concrete on the foundation located on the indoor side.

[0046] In addition, a support member 30 having a vertical portion 31 extending vertically and a protruding portion 32 protruding horizontally from the upper end of the vertical portion 31 is attached to the upper end of the partition member 10. This makes it possible to ensure a position for arranging members such as anchor rulers required for the construction of the concrete structure 200 on the upper end side of the partition member 10.

[0047] Furthermore, a connecting member 40 that connects to the outer formwork 100 is attached to the side of the partition member 10, and the connecting member 40 has a first connecting part 41 that is fixed to the partition member 10 and a second connecting part 42 that protrudes from the first connecting part 41 and is fixed to the outer formwork 100. This makes it possible to firmly fix the partition member 10 to the outer formwork 100.

[0048] Each embodiment of the present invention has been described in detail above with reference to the drawings, but the specific configuration is not limited to these embodiments, and design changes that do not deviate from the gist of the present invention are included in the present invention. [Explanation of symbols]

[0049] 10: Partition material 30: Support member 31: Vertical section 32:Protrusion 40: Connecting member 41: 1st connection part 42:Second connection part 100:Outer formwork 110: Inner formwork 200: Concrete structures A1: 1st area A2:Second area S: Gap

Claims

1. A method for constructing a concrete structure, comprising forming a foundation of a building and an auxiliary structure adjacent to the foundation from concrete, the method comprising the steps of: a formwork installation process for installing an outer formwork surrounding a periphery of a first region corresponding to the foundation portion and a second region corresponding to the auxiliary structure; a partition member installation step of installing a partition member made of a synthetic resin at a boundary portion between the first region and the second region; A pouring step of pouring concrete into the first area and the second area; a formwork removal process for removing the outer formwork when the concrete poured in the pouring process has reached a predetermined hardness.

2. 2. The method for constructing a concrete structure according to claim 1, wherein in the formwork removal process, the portion of the partition member that is not embedded in the concrete poured in the concrete pouring process is removed.

3. 3. The method for constructing a concrete structure according to claim 1, wherein in the pouring step, concrete is poured into the first region and then concrete is poured into the second region.

4. A method of constructing a concrete structure as described in claim 1 or 2, characterized in that a support member having a vertical portion extending vertically and a protruding portion protruding horizontally from the upper end of the vertical portion is attached to the upper end of the partition member.

5. A connecting member that is connected to the outer formwork is attached to the side of the partition member, The method for constructing a concrete structure as described in claim 1 or 2, characterized in that the connecting member has a first connecting portion fixed to the partition member and a second connecting portion protruding from the first connecting portion and fixed to the outer formwork, and the first connecting portion and the second connecting portion are joined together.

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