Building structures

Abstract

The present invention provides a building structure that allows for the installation of columns constituting the superstructure of a building even in areas where there are no piles directly below. [Solution] The building structure (1) comprises a plurality of piles (10), an underground beam (20) extending horizontally to connect the tops of the plurality of piles, a pressure plate (22) provided integrally with the underground beam above the piles, and columns (30) provided on the underground beam between the plurality of piles. The lower end of the underground beam is located below the lower end of the pressure plate, and extensions (32) extending along the longitudinal direction of the underground beam are formed on both sides of the underground beam below the pressure plate, and reinforcing bars (22A) extending along the longitudinal direction of the underground beam are provided in the part located inside the pressure plate and inside the underground beam.

Description

Technical Field

[0004] , , , , , ,

[0005] , , ,

[0003] , , , ,

[0001] The present invention relates to a building structure.

Background Art

[0002] [[ID=II]] [[ID=I2]]Conventionally, in the construction of a building having multiple basement floors, a PCa column is constructed in a self-supporting state as a permanent column without constructing a temporary formwork column, and the upper basement floor of the upper part is first constructed as a prior construction floor on top of the PCa column, and then the upper and lower floors are constructed simultaneously, thereby reducing temporary works and shortening the construction period (for example, Patent Document 1). [[ID=I3]] [[ID=I4]]

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] While shortening the construction period is desired in construction work, particularly in a building having a high-rise portion and a low-rise portion adjacent to the outer periphery thereof, shortening the construction period of the high-rise portion with a large number of man-hours is required. For early construction of the high-rise portion, it is desirable to install temporary columns or permanent PCa columns before completion of the foundation structure construction. However, in the conventional technology as described in the above Patent Document 1, the columns used for construction of the high-rise portion can be provided only in a portion where there are foundation piles directly below and having sufficient bearing capacity. Therefore, early construction of the high-rise portion is restricted, and there are also restrictions on the degree of freedom in the layout design of the columns.

[0005] <° The present invention has been made to solve such problems, and an object thereof is to provide a building structure capable of providing columns constituting the upper structure of the building even in a portion where there are no piles directly below.

Means for Solving the Problems

[0006] To solve the above-mentioned problems, the building structure according to the present invention comprises a plurality of piles, underground beams extending horizontally to connect the heads of the plurality of piles, a pressure-resistant plate provided integrally with the underground beams above the piles, and columns provided on the underground beams between the plurality of piles, wherein the lower end of the underground beams is located below the lower end of the pressure-resistant plate, and extensions extending along the longitudinal direction of the underground beams are formed on both sides of the underground beams below the pressure-resistant plate, and a plurality of reinforcing bars extending along the longitudinal direction of the underground beams are provided in the portion located inside the pressure-resistant plate and inside the underground beams.

[0007] With the present invention configured in this way, since extensions are formed on both sides of the underground beam below the pressure slab, extending along the longitudinal direction of the underground beam, the shear force generated in the cross-section of the underground beam due to loads transmitted from columns in areas where there are no piles directly below can be received by the combined structure of the underground beam and the extensions, ensuring sufficient resistance to shear force. Furthermore, since multiple reinforcing bars are provided inside the pressure slab and inside the underground beam, extending along the longitudinal direction of the underground beam, the tensile force generated inside the pressure slab near the joint between the pressure slab and the column and the joint between the pressure slab and the pile due to bending moments caused by loads transmitted from the column can be received by the multiple reinforcing bars, ensuring sufficient resistance to these tensile forces. As a result, columns constituting the superstructure of the building can be provided even in areas between multiple piles where there are no piles directly below.

[0008] In the present invention, preferably, the combined width of the underground beam and the furring section is greater than the diameter or width of the column.

[0009] According to the present invention configured in this way, the shear force generated in the cross-section of the underground beam due to the load transmitted from the column in a section where there is no pile directly below can be received by a structure having a width greater than the diameter or width of the column, thereby ensuring sufficient resistance to shear force.

[0010] In the present invention, preferably, the extension portion extends between a plurality of piles.

[0011] According to the present invention configured in this manner, sufficient resistance to shear force generated in the cross-section of the underground beam due to loads transmitted from columns can be ensured between multiple piles.

[0012] In the present invention, preferably, multiple reinforcing bars are provided inside the pressure-resistant plate at a position closer to the top of the pressure-resistant plate than to the bottom of the plate.

[0013] According to the present invention configured in this way, the tensile forces generated inside the pressure plate near the joint between the pressure plate and the column and the joint between the pressure plate and the pile, due to the bending moment caused by the load transmitted from the column in the area where there is no pile directly below, can be received by multiple reinforcing bars provided closer to the joint, thereby ensuring sufficient load-bearing capacity against these tensile forces more effectively and at a lower cost.

[0014] In the present invention, preferably, multiple reinforcing bars extend between multiple piles.

[0015] According to the present invention configured in this manner, sufficient resistance can be ensured against tensile forces generated within the pressure plate in the vicinity of the joint between the pressure plate and the column, and the joint between the pressure plate and the pile, due to bending moments caused by loads transmitted from the column between multiple piles. [Effects of the Invention]

[0016] According to the building structure of the present invention, columns constituting the superstructure of the building can be provided even in areas where there are no piles directly below. [Brief explanation of the drawing]

[0017] [Figure 1] This is a plan view of a building structure according to an embodiment of the present invention, as seen from above. [Figure 2] This is a side cross-sectional view showing the II-II section in Figure 1. [Modes for carrying out the invention]

[0018] Hereinafter, referring to the attached drawings, a building structure according to an embodiment of the present invention will be described. FIG. 1 is a plan view of the building structure according to the embodiment of the present invention as seen from above excluding the pressure-resistant slab, and FIG. 2 is a side sectional view showing the II-II section in FIG. 1.

[0019] As shown in FIGS. 1 and 2, the building structure 1 of the present embodiment includes a plurality of piles 10, a ground beam 20, and a pressure-resistant slab 22, and these piles 10, ground beam 20, and pressure-resistant slab 22 form a foundation structure that supports the superstructure of a building including columns 30.

[0020] The piles 10 are steel pipe piles, concrete piles, etc., and are formed in a cylindrical shape having, for example, a length and diameter that reach a support layer. The piles 10 are driven into the ground below the building structure 1 at a predetermined interval in the horizontal direction.

[0021] The head of each of the plurality of piles 10 is connected to the ground beam 20 via a footing 24. That is, the heads of the plurality of piles 10 are connected to each other by the ground beam 20 via the footing 24. The footing 24 is a reinforced concrete member having a width wider than the width of the ground beam 20, is provided above each of the plurality of piles 10, and transmits the load of the building to the piles 10.

[0022] The pressure-resistant slab 22 is a plate-shaped member made of reinforced concrete having a predetermined thickness, and is provided integrally with the ground beam 20 above the piles 10. The lower end of the ground beam 20 is located below the lower end of the pressure-resistant slab 22. There is ground directly below the ground beam 20 and the pressure-resistant slab 22, and the load of the building is transmitted to the ground through the ground beam 20, the pressure-resistant slab 22, and the plurality of piles 10.

[0023] The column 30 is a temporary or permanent column that constitutes the superstructure of a building. In the example shown in FIGS. 1 and 2, a temporary column 30 made of cross H-shaped steel is provided on the ground beam 20 between a plurality of piles 10. That is, the column 30 is provided at a location where the pile 10 is not provided directly below the pressure-resistant slab 22 and the ground beam 20. As shown by the imaginary line (two-dot chain line) in FIG. 2, the ground beam 34 may be extended above the pressure-resistant slab 22 according to the progress of the construction. In this case, the temporary column 30 is embedded in the extended ground beam 34.

[0024] The load of the superstructure is transmitted from the column 30 to the pressure-resistant slab 22 and the ground beam 20. However, since the pile 10 is not provided directly below the pressure-resistant slab 22 and the ground beam 20 at the location where the column 30 is provided, it is necessary for the pressure-resistant slab 22 and the ground beam 20 themselves to support the load from the column 30 without relying on the pile 10.

[0025] When the load is transmitted from the column 30 to the ground beam 20, a shear force is generated in the cross section of the ground beam 20. In order to ensure sufficient shear resistance against this shear force, in this embodiment, on both side surfaces below the pressure-resistant slab 22 of the ground beam 20 where the column 30 is provided between a plurality of piles 10, a plurality of indentation portions 32 extending between the plurality of piles 10 along the longitudinal direction of the ground beam 20 are formed. The combined width Wb of the ground beam 20 and the indentation portion 32 is set such that the width of the indentation portion 32 is larger than the diameter or width Wtp of the column 30. On the other hand, for the ground beam 20 where the column 30 is not provided between a plurality of piles 10, since it is not necessary to support the load from the column 30, the indentation portion 32 is not formed.

[0026] Furthermore, when a load is transmitted from the column 30 to the pressure plate 22, a tensile force is generated inside the pressure plate 22 near the joint between the pressure plate 22 and the column 30 and near the joint between the pressure plate 22 and the pile 10 due to the bending moment caused by this load. In order to ensure sufficient strength against these tensile forces, in this embodiment, multiple reinforcing bars (reinforcement bars) 22A are provided inside the pressure plate 22 and inside the underground beam 20, extending between multiple piles 10 along the longitudinal direction of the underground beam 20. The reinforcement bars 22A are provided inside the pressure plate 22 at a position closer to the top of the pressure plate 22 than to the bottom of the pressure plate 22, that is, at a position close to the joint with the column 30.

[0027] Next, the effects and advantages of the building structure 1 of this embodiment described above will be explained.

[0028] In the building structure 1 of this embodiment, since extensions 32 extending along the longitudinal direction of the underground beam 20 are formed on both sides of the underground beam 20 below the pressure plate 22, the shear force generated in the cross-section of the underground beam 20 due to the load transmitted from the column 30 in the area where there is no pile 10 directly below can be received by the combined structure of the underground beam 20 and the extensions 32, ensuring sufficient resistance to shear force. Furthermore, since reinforcing bars 22A extending along the longitudinal direction of the underground beam 20 are provided in the part located inside the pressure plate 22 and inside the underground beam 20, the tensile force generated inside the pressure plate 22 near the joint between the pressure plate 22 and the column 30 and the joint between the pressure plate 22 and the pile 10 due to the bending moment caused by the load transmitted from the column 30 can be received by the reinforcing bars 22A, ensuring sufficient resistance to these tensile forces. As a result, columns 30 constituting the superstructure of the building can be provided even in the area between multiple piles 10 where there is no pile 10 directly below.

[0029] Furthermore, since the combined width of the underground beam 20 and the furring section 32 is greater than the diameter or width of the column 30, the shear force generated in the cross-section of the underground beam 20 due to the load transmitted from the column 30 in the section where there is no pile 10 directly below can be received by a structure with a width greater than the diameter or width of the column 30, thereby ensuring sufficient resistance to shear force.

[0030] Furthermore, since the extension section 32 extends between the multiple piles 10, sufficient resistance to the shear force generated in the cross-section of the underground beam 20 due to the load transmitted from the column 30 can be ensured between the multiple piles 10.

[0031] Furthermore, since the reinforcing bars 22A are located inside the pressure plate 22, closer to the top than the bottom, the tensile forces generated inside the pressure plate 22 near the joints between the pressure plate 22 and the columns 30 and between the pressure plate 22 and the piles 10 due to bending moments transmitted from the columns 30 in areas where there are no piles 10 directly below can be received by the reinforcing bars 22A located closer to the joints. This allows for more effective and cost-effective securing of sufficient strength against these tensile forces.

[0032] Furthermore, since the reinforcing bars 22A extend between the multiple piles 10, sufficient resistance can be ensured against tensile forces generated inside the pressure plate 22 near the joints between the pressure plate 22 and the columns 30, and near the joints between the pressure plate 22 and the piles 10, due to bending moments caused by loads transmitted from the columns 30, between the multiple piles 10. [Explanation of symbols]

[0033] 1 Architectural structure 10 stakes 20 Underground beam 22 Pressure-resistant plate 22A Reinforcement bars 24 Footing 30 pillars 32 Steaming section 34. Extended underground beams

Claims

1. Multiple piles, A ground beam extending horizontally to connect the heads of the aforementioned multiple piles, Above the aforementioned pile, a pressure-resistant plate is provided integrally with the underground beam, Between the plurality of piles, a column is provided on the underground beam, The lower end of the underground beam is located below the lower end of the pressure plate. On both sides of the underground beam below the pressure plate, extensions are formed that extend along the longitudinal direction of the underground beam. Multiple reinforcing bars are provided in the portion located inside the pressure-resistant plate and inside the underground beam, extending along the longitudinal direction of the underground beam. architectural structure.

2. The building structure according to claim 1, wherein the combined width of the underground beam and the furring section is greater than the diameter or width of the column.

3. The building structure according to claim 1 or 2, wherein the extension portion extends between the plurality of piles.

4. The building structure according to claim 1 or 2, wherein the plurality of reinforcing bars are provided inside the pressure plate at a position closer to the top of the pressure plate than to the bottom of the pressure plate.

5. The building structure according to claim 1 or 2, wherein the plurality of reinforcing bars extend between the plurality of piles.

Images