JP-2026074814-A - Foundation reinforcement structure, foundation, and construction method of foundation reinforcement structure

JP2026074814AJP 2026074814 AJP2026074814 AJP 2026074814AJP-2026074814-A

Abstract

[Problem] To provide a reinforcement structure for a foundation, a foundation, and a construction method for a reinforcement structure for a foundation that can improve the shear strength of the foundation. [Solution] The reinforcement structure of the foundation comprises a first reinforcement unit 20 and a second reinforcement unit 30 that extend parallel to each other at intervals. The multiple first stirrups 22 of the first reinforcement unit 20 are located on the second reinforcement unit 30 side of the multiple first main reinforcements 21 in the second direction Y. The multiple second stirrups 32 of the second reinforcement unit 30 are located on the first reinforcement unit 20 side of the multiple second main reinforcements 31 in the second direction Y. The reinforcement structure of the foundation comprises multiple reinforcing bars 40 located between the first main reinforcements 21 and the second main reinforcements 31 in a plan view, and arranged at intervals in the first direction X. Each reinforcing bar 40 has a first longitudinal bar 41 and a second longitudinal bar 42 extending in the vertical direction Z, and a transverse bar 43 connecting the first longitudinal bar 41 and the second longitudinal bar 42. [Selection Diagram] Figure 3

Inventors

安村光春
西崎誠
奥田隼也
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 (9)

It comprises a first reinforcement unit and a second reinforcement unit that extend parallel to each other with a gap in between, 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 stirrups are located on the second reinforcement unit side of the plurality of first main reinforcements in the second direction, The plurality of the second stirrups are located on the first reinforcement unit side of the plurality of the second main reinforcements in the second direction, In a plan view, the structure is provided with a plurality of reinforcing bars located between the first main reinforcement and the second main reinforcement, and arranged at intervals in the first direction. The reinforcement structure of the foundation comprises a first longitudinal reinforcement and a second longitudinal reinforcement extending in the vertical direction, and a transverse reinforcement connecting the first longitudinal reinforcement and the second longitudinal reinforcement.
The reinforcement structure for a foundation according to claim 1, wherein the reinforcing bars are arranged such that, when viewed from the first direction, the first longitudinal bars overlap with the first stirrups, and the second longitudinal bars overlap with the second stirrups.
The reinforcement structure for a foundation according to claim 1, wherein the reinforcing bars are arranged such that the first longitudinal bars are along the first stirrups and the second longitudinal bars are along the second stirrups.
The aforementioned horizontal reinforcement is A lower transverse bar connecting the lower end of the first longitudinal bar and the lower end of the second longitudinal bar, An upper transverse bar connecting the upper end of the first vertical bar and the upper end of the second vertical bar, The reinforcement structure for the foundation according to claim 1, including the following:
The lower transverse reinforcement is located between the lowest of the multiple first main reinforcements and the lowest of the multiple second main reinforcements. The reinforcement structure for a foundation according to claim 4, wherein the upper transverse reinforcement is located between the uppermost of the plurality of first main reinforcements and the uppermost of the plurality of second main reinforcements.
The aforementioned reinforcing bar is formed by bending a single reinforcing bar into a hoop shape. The reinforcement structure for a foundation according to claim 4, wherein both ends of the reinforcing bars are fixed to each other by welding.
The reinforcing muscle is composed of a first structural muscle and a second structural muscle. The first structural member comprises a first longitudinal structural member and a second longitudinal structural member extending in the vertical direction, and a first transverse structural member that serves as the transverse structural member connecting the lower end of the first longitudinal structural member and the lower end of the second longitudinal structural member. The second structural member comprises a third longitudinal structural member and a fourth longitudinal structural member extending in the vertical direction, and a second transverse structural member serving as the transverse member connecting the upper end of the third longitudinal structural member and the upper end of the fourth longitudinal structural member. The first longitudinal muscle is formed by the overlapping of the first longitudinal muscle and the third longitudinal muscle. The reinforcement structure for a foundation according to claim 1, wherein the second longitudinal reinforcement is formed by the overlapping of the third longitudinal reinforcement and the fourth longitudinal reinforcement.
A foundation comprising a reinforced concrete section and a reinforcing steel section having the reinforcement structure of the foundation described in any one of claims 1 to 7.
A method for constructing a reinforced concrete foundation structure according to any one of claims 1 to 7, A first 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 second arrangement step involves arranging a plurality of reinforcing bars between the first main reinforcement and the second main reinforcement, 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 the first placement step in the construction method for the reinforcement structure of the foundation.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 reinforcement structure of the foundation in the modified example.This is a perspective view showing the reinforcement bars in the modified example. Referring to Figures 1 to 5, 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. The plurality of first stirrups 22 are located closer to the second reinforcement unit 30 than the plurality of first main reinforcements 21 in the second direction Y. 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 stirrups 32 are positioned closer to the first reinforcement unit 20 than the multiple second main reinforcements 31 in the second direction Y. The multiple second main reinforcements 31 and the multiple second s