JP-2026074815-A - Foundation reinforcement structure, foundation, and construction method of foundation reinforcement structure

Abstract

[Problem] To provide a reinforced concrete foundation structure, a foundation, and a construction method for a reinforced concrete foundation structure that can improve the ductility performance of the foundation. [Solution] The reinforcement structure of the foundation is arranged with intervals in the first direction X, and includes multiple reinforcing bars 40 that surround multiple first main reinforcements 21 and multiple second main reinforcements 31 when viewed from the first direction X. Each reinforcing bar 40 is composed of a lower reinforcing bar 41 and an upper reinforcing bar 42. The lower reinforcing bar 41 has a first lower vertical bar 41a and a second lower vertical bar 41b that extend in the vertical direction Z on both sides of the first main reinforcements 21 and the second main reinforcements 31, and a lower horizontal bar 41c that connects the first lower vertical bar 41a and the second lower vertical bar 41b. The upper reinforcing bar 42 has a first upper vertical bar 42a and a second upper vertical bar 42b that extend in the vertical direction Z on both sides of the first main reinforcements 21 and the second main reinforcements 31, and an upper horizontal bar 42c that connects the first upper vertical bar 42a and the second upper vertical bar 42b. Multiple lower reinforcing bars 41 are connected by lower connecting bars 50. [Selection Diagram] Figure 3

Inventors

• 奥田 隼也
• 西崎 誠
• 安村 光春
• 渡辺 洋平
• 工藤 知子
• 吉田 誠
• 松原 由幸

Assignees

• 積水ハウス株式会社

Dates

Publication Date

20260507

Application Date

20241021

Claims (6)

1. It comprises a first reinforcement unit and a second reinforcement unit that extend parallel to each other with a gap between them, The direction in which the first reinforcement unit and the second reinforcement unit extend is defined as the first direction. When the direction in which the first reinforcement unit and the second reinforcement unit are aligned is defined as the second direction, The first reinforcement unit comprises a plurality of first main reinforcements extending in the first direction and spaced apart in the vertical direction, and a plurality of first stirrups connecting the plurality of first main reinforcements in the vertical direction and spaced apart in the first direction. The second reinforcement unit is a reinforcement structure for a foundation having a plurality of second main reinforcements extending in the first direction and spaced apart in the vertical direction, and a plurality of second stirrups connecting the plurality of second main reinforcements in the vertical direction and spaced apart in the first direction, The plurality of first main reinforcements are located on the second reinforcement unit side of the plurality of first stirrups in the second direction. The plurality of the second main reinforcements are located on the first reinforcement unit side of the plurality of the second stirrups in the second direction. The reinforcing bars are arranged at intervals in the first direction and, when viewed from the first direction, surround the plurality of first main reinforcements and the plurality of second main reinforcements. The reinforcing bars are composed of lower reinforcing bars and upper reinforcing bars. The lower reinforcing bars include a first lower longitudinal bar and a second lower longitudinal bar extending vertically on both sides of the first main bar and the second main bar, and a lower transverse bar connecting the first lower longitudinal bar and the second lower longitudinal bar on the lower side of the first reinforcement unit and the second reinforcement unit. The upper reinforcing bars include a first upper longitudinal bar and a second upper longitudinal bar extending vertically on both sides of the first main bar and the second main bar, and an upper transverse bar connecting the first upper longitudinal bar and the second upper longitudinal bar on the upper side of the first reinforcement unit and the second reinforcement unit. A reinforcement structure of a foundation in which multiple lower reinforcing bars are connected by lower connecting bars.
2. The lower reinforcing bars are arranged such that, when viewed from the first direction, the first lower longitudinal bar overlaps with the first rib muscle, and the second lower longitudinal bar overlaps with the second rib muscle. The reinforcement structure for a foundation according to claim 1, wherein the upper reinforcing bars are arranged such that, when viewed from the first direction, the first upper longitudinal bars overlap with the first stirrups and the second upper longitudinal bars overlap with the second stirrups.
3. The lower reinforcing bars are arranged such that the first lower longitudinal bar follows the first rib and the second lower longitudinal bar follows the second rib. The reinforcement structure for a foundation according to claim 1, wherein the upper reinforcing bars are arranged such that the first upper longitudinal bar follows the first stirrup and the second upper longitudinal bar follows the second stirrup.
4. The foundation reinforcement structure according to claim 1, wherein the multiple upper reinforcing bars are connected by upper connecting bars.
5. A reinforcing bar section having the reinforcement structure of the foundation as described in any one of claims 1 to 4, Concrete section, A foundation equipped with these features.
6. A method for constructing a reinforced concrete foundation structure according to any one of claims 1 to 4, A first arrangement step involves arranging a plurality of lower reinforcing bars connected by the lower connecting bars, A second arrangement step involves arranging the first reinforcement unit and the second reinforcement unit so that they extend parallel to each other with a gap between them, A third arrangement step involves arranging multiple upper reinforcing bars, Construction method for the reinforced concrete structure of the foundation, including [specific component].

Description

This disclosure relates to a reinforcement structure for foundations, a foundation, and a method for constructing a reinforcement structure for foundations. The double reinforcement structure for reinforced concrete foundation beams described in Patent Document 1 comprises a pair of left and right beam reinforcement frames extending parallel to each other at a fixed interval. Each beam reinforcement frame has an upper beam main reinforcement, a lower beam main reinforcement, and a plurality of stirrups. The upper and lower beam main reinforcements extend parallel to each other at a predetermined interval vertically. The plurality of stirrups are arranged at a predetermined pitch in the axial direction of the upper and lower beam main reinforcements. The upper end of each stirrup is welded to the upper beam main reinforcement. The lower end of each stirrup is welded to the lower beam main reinforcement. Japanese Patent Publication No. 2017-078254 This is a front view of the foundation.This is a cross-sectional view of the foundation along line 2-2 in Figure 1.This is a perspective view showing the reinforcement structure of the foundation.This is a perspective view showing multiple lower reinforcing bars and lower connecting bars.This is a perspective view showing the second placement step in the construction method for the reinforcement structure of the foundation.This is a perspective view showing the third placement step in the construction method for the reinforcement structure of the foundation.This is a perspective view showing the upper reinforcing bar in the modified example. Referring to Figures 1 to 6, the reinforcement structure of the foundation 10, the foundation 10, and the construction method of the reinforcement structure of the foundation 10 in this embodiment will be described. The reinforcement structure of the foundation 10, the foundation 10, and the construction method of the reinforcement structure of the foundation 10 in this embodiment are used for low-rise or mid-rise buildings. As shown in Figures 1 and 2, the foundation 10 is made of reinforced concrete. The foundation 10 has a reinforced concrete section 11 and a concrete section 12. The reinforcement structure of the foundation 10 in this embodiment is used in areas of the foundation 10 where many structural columns are provided. These areas of the foundation 10 include, for example, bathrooms, toilets, washrooms, and stairwells. <Reinforcement structure of foundation 10> As shown in Figures 2 and 3, the reinforced concrete section 11 comprises a first reinforcement unit 20 and a second reinforcement unit 30. The first reinforcement unit 20 and the second reinforcement unit 30 extend parallel to each other with a gap between them. The direction in which the first reinforcement unit 20 and the second reinforcement unit 30 extend is called the first direction X. The direction in which the first reinforcement unit 20 and the second reinforcement unit 30 are aligned is called the second direction Y. The first reinforcement unit 20 has a plurality of first main reinforcements 21 and a plurality of first stirrups 22. In this embodiment, the first reinforcement unit 20 has two first main reinforcements 21 as the plurality of first main reinforcements 21. Each first main reinforcement 21 extends in the first direction X. The plurality of first main reinforcements 21 are spaced apart in the vertical direction Z. Each first stirrup 22 connects the plurality of first main reinforcements 21 in the vertical direction Z. The plurality of first stirrups 22 are spaced apart in the first direction X. In the second direction Y, the plurality of first main reinforcements 21 are located closer to the second reinforcement unit 30 than the plurality of first stirrups 22. The plurality of first main reinforcements 21 and the plurality of first stirrups 22 are fixed to each other by welding. The second reinforcement unit 30 has a plurality of second main reinforcements 31 and a plurality of second stirrups 32. In this embodiment, the second reinforcement unit 30 has two second main reinforcements 31 as the plurality of second main reinforcements 31. Each second main reinforcement 31 extends in the first direction X. The plurality of second main reinforcements 31 are spaced apart in the vertical direction Z. Each second stirrup 32 connects the plurality of second main reinforcements 31 in the vertical direction Z. The plurality of second stirrups 32 are spaced apart in the first direction X. The spacing of the second stirrups 32 in the first direction X is the same as the spacing of the first stirrups 22 in the first direction X. The second stirrups 32 are aligned with the first stirrups 22 in the second direction Y. The multiple second main reinforcement bars 31 are positioned closer to the first reinforcement unit 20 than the multiple second stirrups 32 in the second direction Y. The multiple second main reinforcement bars 31 and the multiple second s