JP5964672B2 - Housing structure and construction method of housing - Google Patents

Description

  The present invention relates to a frame structure having a pillar and a foundation and a construction method.

  In general, the frame work for the foundation tends to be troublesome at the construction site. In order to improve the efficiency of the frame construction, a construction method using a PCa (precast) member has been proposed. For example, Patent Document 1 proposes a method in which a column base hole is formed on the upper surface of a footing foundation, and a PCa column is installed here. Patent Document 2 proposes that a footing is formed in two stages, a PCa pillar is built in the stage where the lower part is formed, and then the upper part is formed. Patent Document 3 proposes a structure in which a plurality of PCa foundation beams are integrated with a footing to construct a foundation.

Japanese Patent Laid-Open No. 10-311041 JP 2009-174135 A Japanese Patent Laid-Open No. 7-268883

  Although the construction methods of Patent Documents 1 and 2 improve the construction efficiency of the columns, the construction time and the foundation beam before the construction of the columns require more time than a general construction method, so the effect of shortening the construction period is not so high. The construction method of Patent Document 3 improves the construction efficiency of the foundation beam, but it is necessary to support the foundation beam before assembling the footing formwork, which takes time and effort.

  The objective of this invention is improving the construction efficiency of a pillar and a foundation.

According to the present invention, in a frame structure including a pillar part, a foundation beam part, and a foundation part that connects the pillar part and the foundation beam part, the foundation part has a groove having a flat bottom surface. The column part and the foundation beam part are provided with the bottom part of the inverted T-shaped first having a flat bottom so that the foundation beam part protrudes from the lower end part of the pillar part to both sides. A housing structure is provided , wherein the housing is formed of a PCa member , and the first PCa member is joined to the base portion in a state of being disposed on the bottom surface of the groove .

In addition, according to the present invention, in the construction method of a frame including a column part, a foundation beam part, and a foundation part that connects the pillar part and the foundation beam part, the foundation part having a groove is constructed. a step of, insert the first PCa member having integrally with the said pillar portion foundation beam portion in the groove, seen including and a step of joining said first PCa member and said base portion, The groove traverses the foundation and has a flat bottom surface, and the first PCa member has an inverted flat bottom surface in which the foundation beam protrudes from the lower end of the pillar to both sides. A method for constructing a housing is provided, which is formed in a T shape .

  According to the present invention, the construction efficiency between the pillar and the foundation can be improved.

The schematic diagram which shows the housing which concerns on one Embodiment of this invention. Explanatory drawing of the construction method of the housing of FIG. Explanatory drawing of the construction method of the housing of FIG. Explanatory drawing of the construction method of the housing of FIG. (A) is explanatory drawing of the construction method of the housing of FIG. 1, (B) is a schematic diagram of another example of a housing. (A) And (B) is explanatory drawing of another example of the joining method, (C) is a schematic diagram of another example of a PCa member and a groove | channel.

  FIG. 1 is a schematic view showing a housing 1 according to an embodiment of the present invention. The frame 1 includes a column portion 10, a foundation beam portion 11, and a foundation portion 12 that connects the column portion 10, the foundation beam portion 11, and the pile 13. The foundation 12 is supported on the pile 13 and constitutes a pile cap foundation of the pile 13. The column part 10 and the foundation beam part 11 are formed of the PCa member 2, and in the example of FIG. 1, three PCa members 2 are connected to each other. Details thereof will be described later.

  Next, a method for constructing the housing 1 will be described with reference to FIGS. 2 to 5A. As shown in ST1 of FIG. 2, after the pile 13 is driven, the level concrete 14 is driven around the pile head 13a. After inking, etc., as shown in ST2 of FIG. Thereafter, the formwork is installed and the concrete of the foundation portion 12 is cast to construct the foundation portion 12. About the joining method of the pile head 13a and the foundation part 12, the semi-rigid joining method which covers a pile head 13a and makes it non-fixed with the foundation part 12 may be sufficient, and rigid joining may be sufficient.

  ST3 in FIG. 2 shows a state in which the base portion 12 is constructed. The base portion 12 has a groove 121. In the present embodiment, the groove 121 is a linear groove that crosses the base portion 12. Next, the PCa member 2 is lifted by a heavy machine, and the PCa member 2 is inserted into the groove 121 as shown in ST4 and ST5 of FIG. The PCa member 2 includes a column part 10 and a foundation beam part 11 integrally.

  In the case of this embodiment, the column part 10 and the foundation beam part 11 are the same thickness, and the whole PCa member 2 is flat. That the pillar part 10 is a flat pillar contributes to ensuring the effective space of a building. By making the foundation beam portion 11 the same thickness as the column portion 10 and making the PCa member 2 as a whole flat, manufacturing and handling can be simplified.

  Moreover, in the case of this embodiment, the foundation beam part 11 protrudes in the both sides from the lower end part of the pillar part 10, and the PCa member 2 has comprised the inverted T shape as a whole. There is an advantage that the foundation beam part 11 extending in both directions from the foundation part 12 can be simultaneously constructed.

  The groove 121 is formed according to the outer shape of the PCa member 2. The groove 121 preferably has a width and a depth at which the PCa member 2 inserted into the groove 121 can stand on its own. The PCa member 2 can be supported by the base portion 12, and the subsequent joining work can be facilitated.

  Next, the PCa member 2 and the base part 12 are joined. For example, the joining is performed by filling the gap between the inner surface of the groove 121 and the PCa member 2 with a filler 122 as shown in ST6 of FIG. The filler 122 is, for example, grout 122 or concrete. For the purpose of improving the bonding force, cotter unevenness may be formed on the inner surface of the groove 121 as shown in FIG. 6A, and similarly, the cotter unevenness may be formed also on the PCa member 2 side. In addition, as shown in FIG. 6B, fixing stripes 121b may be provided from the inner surface of the groove 121. The fixing stripe 121b may be provided on the PCa member 2 side, or may be provided on both the inner surface of the groove 121 and the PCa member 2.

  Next, an operation for joining the foundation beam portions 11 is performed. In this embodiment, it joins by adding the PCa member 2 and arrange | positioning the new PCa member 2 between the foundation beam parts 11 of existing PCa2. ST7 in FIG. 4 shows a state in which a new PCa member 2 is arranged between the existing PCa members 2. The pillar part 10 of the new PCa member 2 becomes a stud. The foundation beam portions 11 can be joined by an existing joining technique between PCa members. As shown in FIG. 5 (A), the concrete 111 is placed and filled in the gaps between the foundation beam portions 11, and the frame 1 shown in FIG. 1 is completed.

  In addition, as a new PCa member which joins between the existing foundation beam parts 11, the thing without the pillar part 10 may be sufficient. FIG. 5B is an example in which the existing foundation beam portions 11 are joined by the PCa member 20 having only the foundation beam portion 11.

  Moreover, you may perform the construction of the slab (not shown) which fits the upper end of the foundation beam part 11 after the PCa member 2 is attached to the foundation part 12.

  Thus, in this embodiment, the pillar part 10 and the foundation beam part 11 of the lowest floor of a building can be constructed simultaneously by using the PCa member 2 integrally provided with the pillar part 10 and the foundation beam part 11. . For this reason, construction in a short construction period is possible, and the construction efficiency between the pillar and the foundation can be improved.

  Although it is necessary to form the groove | channel 121 in the base part 12, since it can construct | assemble regardless of other joints, it can avoid that it leads to an increase in work period or cost by diversion of a formwork.

  In the present embodiment, the PCa member 2 is exemplified as having the foundation beam portions 11 for two directions on the same straight line, but is not limited thereto. FIG. 6C shows the PCa member 2 ′ having the foundation beam portions 11 for three directions, and the shape of the groove 121 ′ of the foundation portion 12 ′ also corresponds to the shape of the foundation beam portions 11 for three directions. It has become a thing. Thus, the foundation beam part with which PCa member is provided may be for three directions or more, and may be for one direction. Moreover, even if it is for two directions, it is not necessary to extend on the same straight line, and for example, it may be for two orthogonal directions.

Claims (3)

In a frame structure comprising a pillar part, a foundation beam part, and a foundation part that connects the pillar part and the foundation beam part,
The foundation has a groove with a flat bottom .
The pillar part and the foundation beam part are provided integrally with each other such that the foundation beam part protrudes from the lower end part of the pillar part to both sides, and the first PCa member having a flat bottom surface and having a flat bottom surface. Formed by
The first PCa member is joined to the base portion in a state of being disposed on the bottom surface of the groove . The first PCa members that are respectively joined to the adjacent base portions are joined via another first PCa member or a second PCa member that is only the base beam portion. The housing structure according to claim 1. In a method for constructing a housing comprising a column part, a foundation beam part, and a foundation part that connects the pillar part and the foundation beam part,
Building the foundation having a groove;
Plug first PCa member having a said pillar portion and the foundation beam portion integrally with the grooves, it viewed including the the steps of bonding the said first PCa member base part,
The groove traverses the foundation and has a flat bottom surface;
The first PCa member is formed in an inverted T-shaped structure in which the foundation beam portion projects from both sides from the lower end portion of the column portion and the bottom surface is flat .

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