JP2017078258A - Construction method of slab structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of a slab structure for improving workability.SOLUTION: A construction method of a slab structure having beam materials 2 and 3 for a capital part in an outer peripheral part of the capital part 5 around a column 1 in a slab, comprises a first step of constructing a capital unit 6 having the lower layer side of the capital part 5 and the beam materials 2 and 3 for the capital part as a basic assembly unit J by placing concrete with the basically assembled beam materials 2 and 3 for the capital part as a side face form by basically assembling the beam materials 2 and 3 for the capital part, a second step of arranging in a predetermined part of the column 1 by moving the basic assembly unit J constructed in the first step and a third step of constructing the slab by placing the concrete on the upper surface side of the basic assembly unit J arranged in the predetermined part of the column 1 in the second step.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a construction method of a slab structure provided with a concrete slab.

  As the slab structure, a flat slab structure with no beams is known. In this flat slab structure, a capital portion is provided around the column, and reinforcement around the column is made (see, for example, Patent Document 1).

  In the flat slab structure of Patent Document 1, a hole formed in a precast concrete capital is passed through a pillar, the capital is placed at the upper end of the pillar, and then the slab concrete is placed. However, since there is no beam capable of supporting a formwork such as a deck plate when placing concrete in a slab, a large number of support works (temporary struts) are required, and construction is difficult to perform.

  Therefore, the present applicant has applied for a slab structure that facilitates construction (Japanese Patent Application No. 2014-65711). In this slab structure, a pair of beam members are arranged with the columns facing each other across the columns, and concrete is placed between the columns and the beam sides of the pair of beam members to form a capital, A concrete slab is supported by the beam. When forming capital, a pair of beams can be used to support a formwork such as a deck plate, and a pair of beams can be used as a side formwork. Since a formwork such as a plate can be supported by a pair of beam members, the construction becomes easy.

Japanese Patent Laid-Open No. 6-57865

  However, due to demands for labor saving and shortening the construction period, further improvement of workability is desired from the aspect of construction procedures.

  In view of this situation, a main problem of the present invention is to provide a construction method of a slab structure that can improve the workability.

The first characteristic configuration of the present invention is a construction method of a slab structure including a beam material for a capital portion on an outer peripheral portion of a capital portion around a column in the slab,
A capital unit comprising the above-mentioned beam portion for the capital part, and placing the concrete with the side-by-side form of the beam member for the capital portion as a side frame, and comprising a lower layer side of the capital portion and the beam member for the capital portion A first step of constructing as a ground unit,
A second step in which the ground unit constructed in the first step is moved and disposed at a predetermined part of the pillar;
The third step is to provide a third step of constructing a slab by placing concrete on the upper surface side of the ground unit placed in a predetermined part of the column in the second step.

  According to this configuration, in the first step, since the capital unit including the lower layer side of the capital part and the beam material for the capital part is constructed by the ground structure, the capital unit can be easily made while reducing the work at high places. And can be constructed efficiently. In addition, in constructing a capital unit, the beam material for the capital part is used for supporting the bottom mold and the like, and the beam material for the capital part itself can also be used as the side mold and can be placed in the concrete. In the third step, since the ground unit is disposed at a predetermined part of the pillar, the ground unit is used to support the bottom mold and the like, and the ground unit is used as a part of the bottom mold. Can place concrete in slabs. From the above, it is possible to easily and efficiently construct a slab structure using the capital part beam material and the ground unit while reducing the work at high places, and it is possible to effectively improve the workability.

  In the second characteristic configuration of the present invention, in the first step, a plurality of the capital units and a general partial beam material extending between the plurality of capital units are grounded to form the grounding unit. It is in.

  According to this configuration, in the first step, not only the capital unit but also the general partial beam material is grounded to construct the grounding unit. Easy and efficient construction. In addition, since a plurality of capital units are included in one ground assembly unit, a plurality of capital units can be disposed at desired positions simply by placing one ground assembly unit at a desired position. From this aspect, workability can be improved.

  According to a third characteristic configuration of the present invention, in the first step, a plurality of the capital units, the general part beam members, and a slab deck plate supported by the general part beam members are grounded. It is in the point set as the ground unit.

  According to this configuration, in the first step, in addition to the capital unit and the general part beam material, the slab deck plate is also built, and the ground unit is constructed. A grounding unit can be constructed easily and efficiently. Moreover, by laying the slab deck plate, the slab deck plate can be installed in a stable state between the capital units by being supported by the general partial beam material, and the subsequent concrete placement can be performed appropriately.

Plan view of slab structure Perspective view showing the capital unit Sectional view at III-III in Fig. 1 during construction of slab structure Sectional view of the slab structure at IV-IV in FIG. Plan view of the slab structure when another ground unit is constructed Perspective view showing the ground unit Plan view of the slab structure when another ground unit is constructed

An embodiment of a construction method for a slab structure according to the present invention will be described with reference to the drawings.
The slab structure 100 is configured as a flat slab structure. As shown in FIG. 1, the slab structure 100 includes a pillar 1, a concrete slab part 4 as a general part, and a concrete capital part 5 arranged around the pillar 1. The slab portion 4 and the capital portion 5 are reinforced by a first beam member 2 extending along the Y direction and a second beam member 3 extending along the X direction. Here, the X direction and the Y direction are two directions along a horizontal direction orthogonal to each other.

  The pillars 1 are arranged at intervals in the X direction and the Y direction. The column 1 is, for example, a steel column such as a circular steel pipe. The column 1 is not limited to a steel column, and various types of columns such as a reinforced concrete column, a steel-framed reinforced concrete column, and a concrete-filled steel pipe column can be used.

  For example, the first beam members 2 are configured by appropriately joining H-shaped steel materials, and a pair of the first beam members 2 are arranged so as to face each other with the column 1 sandwiched in the X direction. A pair of first beam members 2 is arranged for each of the plurality of columns 1 arranged in the Y direction. The first beam member 2 includes a pair of first capital portion beam members 2a arranged on the outer peripheral portion of the capital portion 5 opposed in the X direction and a pair of capital portions 5 arranged in the Y direction. A first general beam member 2b.

  For example, the second beam members 3 are configured by appropriately joining H-shaped steel materials, and are arranged in a pair so as to face each other with the column 1 sandwiched in the Y direction. A pair of second beam members 3 is arranged for each of the plurality of columns 1 arranged in the X direction. The second beam member 3 includes a pair of second capital portion beam members 3a disposed on the outer peripheral portion of the capital portion 5 facing in the Y direction and a pair of capital portions 5 disposed in the X direction. And a second general portion beam member 3b.

  Here, the first beam material 2 and the second beam material 3 are not limited to H-shaped steel materials, and various steel materials such as I-shaped steel materials and square steel pipes can be used. Moreover, about joining of the steel materials in the 1st beam material 2 and the 2nd beam material 3, various joining methods, such as spanning a plate between steel materials and joining with a volt | bolt and a nut, are applicable, for example.

  The pair of first capital portion beam members 2a and the pair of second capital portion beam members 3a are arranged in a rectangular shape in plan view surrounding the periphery of the pillar 1, and the pair of first capital portion beam members 2a and A pair of second capital portion beam members 3a is configured as a capital portion beam member. The pair of first general-part beam members 2b are provided continuously to the pair of first capital-part beam members 2a, and are arranged between the pair of first capital-part beam members 2a arranged in the Y direction. Has been. The pair of second general portion beam members 3b is provided continuously to the pair of second capital portion beam members 3a, and is disposed between the pair of second capital portion beam members 3a arranged in the X direction. Has been. The pair of first general part beam members 2b and the pair of second general part beam members 3b are configured as general part beam members. Thus, the 1st beam material 2 and the 2nd beam material 3 are arrange | positioned at the cross-beam shape by planar view.

  Further, as the second beam member 3, a third general portion beam member 7 is disposed between the first general portion beam members 2b. The third general partial beam member 7 is disposed at a location where the interval between the first general partial beam members 2b is large among the first general partial beam members 2b arranged in the X direction. Incidentally, the third general portion beam member 7 can be disposed also at a location where the distance between the first general portion beam members 2b is small.

  As shown in FIG. 4, the capital portion 5 is thicker than the slab portion 4 in a state of projecting downward from the lower surface portion of the slab portion 4 to reinforce the joint portion between the column 1 and the slab portion 4. doing. The capital portion 5 includes a capital unit 6 (see a solid line portion in FIG. 1) having a lower layer side portion 5a of the capital portion 5, a pair of first capital portion beam members 2a, and a pair of second capital portion beam members 3a. The upper portion 5b of the capital portion 5 is placed on the upper surface side of the capital unit 6 with concrete.

  Since the capital part 5 is reinforced by the pair of first capital part beam members 2a and the pair of second capital part beam members 3a, the thickness of the capital part 5 can be reduced as much as possible, and the weight of the capital part 5 can be reduced. Can be realized. Studs 11 are disposed on the top and side surfaces of the first capital portion beam material 2a and the second capital portion beam material 3a.

Hereinafter, the construction method of the slab structure 100 will be described.
First, as shown in FIG. 2, a pair of first capital part beam members 2a and a pair of second capital part beam members 3a are grounded, and a pair of first capital part beam members 2a and Concrete is cast using a pair of second capital portion beam members 3a as side molds, and a lower portion 5a of the capital portion 5, a first capital portion beam member 2a, and a second capital portion beam member 3a are provided. The 1st step which constructs the capital unit 6 which has it as the ground unit J is performed.

  In the first step, the pair of first capital portion beam members 2a and the pair of second capital portion beam members 3a are assembled in an assembly yard or the like, thereby having a rectangular frame portion in plan view. Configure. In the frame portion, the ends of the capital deck plate 8 are supported by lower flanges of each of the pair of first capital portion beam members 2a and the pair of second capital portion beam members 3a, and the pair of first capital portions A capital deck plate 8 is placed across the partial beam member 2a and the pair of second capital partial beam members 3a. The capital deck plate 8 is a bottom mold, and the pair of first capital part beam members 2a and the pair of second capital part beam members 3a are side molds. Build unit 6. At this time, an insertion port 9 through which the column 1 can be inserted is formed in the central portion of the capital unit 6 in plan view.

  In the first step, since the capital unit 6 is constructed by the ground structure, the capital unit 6 can be constructed easily and efficiently while reducing the work at high places. Further, in the construction of the capital unit 6, concrete can be placed using the pair of first capital portion beam members 2 a and the pair of second capital portion beam members 3 a to support the capital deck plate 8. The workability can be improved.

  Next, as shown in FIG. 3, the second step of moving the capital unit 6 (ground unit J) and disposing it at a predetermined part of the pillar 1 is performed. In this second step, the column 1 is inserted into the insertion port 9 of the capital unit 6, the capital unit 6 is moved to a predetermined part of the column 1, and the column 1 and the capital unit 6 are joined to various joints such as non-shrink mortar. Join by means. Then, as shown in FIG. 1, the first general beam member 2b is arranged between the capital units 6 arranged in the Y direction, and is arranged between the capital units 6 arranged in the X direction. (2) A beam member 3b for general parts is provided. Further, in the first general partial beam members 2b arranged in the X direction, the third general general beam member 2b is provided between the first general partial beam members 2b at a portion where the distance between the first general partial beam members 2b is large. A partial beam 7 is disposed. Incidentally, the timing at which the general partial beam members 2b, 3b, and 7 are arranged can be appropriately changed depending on the construction status and the like.

  Next, as shown in FIG. 4, the third step of constructing the upper portion 5 b and the slab portion 4 of the capital portion 5 by placing concrete on the upper surface side of the capital unit 6 (ground unit J) is performed. In this third step, first, as shown in FIG. 3, the first capital portion beam material 2a, the second capital portion beam material 3a, the first general portion beam material 2b, and the second general portion beam material 3b. And the end part of the deck plate 10 for slabs is supported by the upper flange in each of the beam members 7 for 3rd general parts, the beam material 2a for 1st capital parts, the beam material 3a for 2nd capital parts, A slab deck plate 10 is placed over the first general beam member 2b, the second general beam member 3b, and the third general beam member 7. Then, as shown in FIG. 4, reinforcing bars 12 are arranged on the upper surface side of the capital unit 6 and the slab deck plate 10, the slab deck plate 10 and the capital unit 6 are used as a bottom mold, and the capital unit 6 and the slab deck plate are used. Concrete is placed on the upper surface side of the deck plate 10 to construct the upper layer side portion 5b and the slab portion 4 of the capital portion 5. At this time, concrete placement may be performed while appropriately supporting a necessary portion by a support work such as a pipe support.

  In the third step, the first capital portion beam material 2a, the second capital portion beam material 3a, the first general portion beam material 2b, the second general portion beam material 3b, And while using each of the beam material 7 for 3rd general parts, it can cast concrete using the capital unit 6 as a bottom mold, and can improve workability | operativity.

  In the first step described above, one capital unit 6 is constructed as a ground unit J as shown in FIG. 2, but the ground unit J can be constructed including a plurality of capital units 6. For example, as shown in the solid line part of FIG. 5 and FIG. 6, the ground unit J can be constructed including two capital units 6 adjacent in the Y direction.

  In the construction method in this case, in the first step, the plurality of capital units 6, the first general part beam material 2 b extending between the plurality of capital units 6, and the second general part beam material 3 b are supported. A grounding unit J is a grounding slab deck plate 10 to be grounded.

  In the first step, as shown in FIG. 6, one beam member having the first capital portion beam member 2a, the first general portion beam member 2b, and the first capital portion beam member 2a is used as the first beam member. 2 and the first beam members 2 are arranged to face each other at a predetermined interval. A pair of second capital portion beam members 3a is disposed between the first capital member beam members 2a at both end portions of the first beam member 2, and the both ends of the first beam member 2 are viewed in plan view. A beam member having a rectangular frame portion is formed.

  In each of the rectangular frame portions, the capital deck plate 8 is spanned across the pair of first capital portion beam members 2a and the pair of second capital portion beam members 3a, as in the first step described above. The two capital units 6 are constructed by casting concrete. In each of the second capital portion beam material 3a in the one side capital unit 6 and the second capital portion beam material 3a in the other side capital unit 6, and in the pair of first general portion beam materials 2b The end portion of the slab deck plate 10 is supported by the upper flange, and the slab deck plate 10 is arranged between the two second capital portion beam members 3a and the pair of first general portion beam members 2b. Set up. As a result, the grounding unit J is constructed by grounding the two capital units 6, the pair of first general partial beam members 2 b, and the slab deck plate 10. Part of the slab deck plate 10 can also be constructed on the ground as a ground unit J, effectively reducing the work at high places, and the construction of the flat slab structure 100 can be performed easily and safely. It is possible to effectively improve the performance.

  In the first step, by constructing a grounding unit J in which two capital units 6, a pair of first general part beam members 2b, and a slab deck plate 10 are grounded, one ground is formed in the second step. The arrangement work of the two capital units 6, the pair of first general part beam members 2b, and the slab deck plate 10 can be performed only by arranging the assembly unit J at a predetermined portion of the pillar 1 (see FIG. 3). . Thereby, the slab structure 100 can be constructed easily and efficiently by reducing the work at a high place where a part of the slab deck plate 10 is disposed.

  In FIG. 5 and FIG. 6 described above, the ground unit J is constructed including the two capital units 6 adjacent in the Y direction. However, as shown in the solid line part of FIG. It is also possible to construct the ground unit J including a total of four capital units 6 adjacent in the direction.

  In the example shown in FIG. 7, in addition to the four capital units 6, the general partial beam members 2 b and 3 b extending over the four capital units 6, and the slab deck plate 10, the third general partial beam member 7 is used. Can also be constructed on the ground, reducing the work at high places and further improving the workability.

  As described above, the number of capital units 6 including the ground unit J can be appropriately changed. Therefore, the slab structure 100 can be constructed by constructing one type of ground unit J by setting the number of capital units 6 included in the ground unit J to one, depending on the construction conditions and the like. It is also possible to construct a plurality of types of ground unit J by setting a plurality of capital units 6 included in the ground unit J, and to construct the slab structure 100 by combining the plurality of ground units J.

[Another embodiment]
(1) In the above embodiment, as shown in FIGS. 5 and 6, in the first step, two capital units 6 adjacent in the Y direction, a pair of first general beam members 2b, and a slab deck plate 10 are used. As an example, a grounding unit J is a grounding unit. Instead of this, a grounding unit J can be obtained by grounding two capital units 6 adjacent in the X direction, a pair of second general portion beam members 3b, and a deck plate 10 for slab.

(2) In the above embodiment, an example in which both the first beam member 2 and the second beam member 3 are provided has been described. However, only one of the first beam member 2 and the second beam member 3 may be provided. In FIG. 2, the capital unit 6 includes a pair of first capital portion beam members 2a and a pair of second capital portion beam members 3a, and forms a rectangular frame portion in plan view. Instead, the capital unit 6 may include only a pair of first capital portion beam members 2a arranged to face each other, or only a pair of second capital portion beam members 3a arranged to face each other. . Also in FIG. 6, as the ground unit J, the four second capital portion beam members 3 a are omitted, and only the pair of first beam members 2 arranged to face each other are provided or arranged to face each other. The pair of first beam members 2 can be omitted, and only the four second capital portion beam members 3a can be provided.

1 Pillar 2a Beam material for the first capital part (beam material for the capital part)
2b First general part beam material (general part beam material)
3a First capital part beam material (capital part beam material)
3b Beam material for second general part (beam material for general part)
4 Slab part (slab)
5 Capital part (slab)
5a Lower part of the capital part 6 Capital unit 10 Slab deck plate J Groundwork unit

Claims (3)

In the construction method of the slab structure with the beam material for the capital part on the outer periphery of the capital part around the column in the slab,
A capital unit comprising the above-mentioned beam portion for the capital part, and placing the concrete with the side-by-side form of the beam member for the capital portion as a side frame, and comprising a lower layer side of the capital portion and the beam member for the capital portion A first step of constructing as a ground unit,
A second step in which the ground unit constructed in the first step is moved and disposed at a predetermined part of the pillar;
A method for constructing a slab structure comprising a third step of constructing a slab by placing concrete on the upper surface side of the ground unit disposed at a predetermined part of the column in the second step.   The construction of the slab structure according to claim 1, wherein in the first step, a plurality of the capital units and a general partial beam material extending between the plurality of capital units are grounded to form the grounding unit. Method. 3. In the first step, a plurality of the capital units, the general part beam members, and a slab deck plate supported by the general part beam members are grounded to form the ground unit. The construction method of the slab structure as described in 2.

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