JPH0546410B2 - - Google Patents
Info
- Publication number
- JPH0546410B2 JPH0546410B2 JP62228172A JP22817287A JPH0546410B2 JP H0546410 B2 JPH0546410 B2 JP H0546410B2 JP 62228172 A JP62228172 A JP 62228172A JP 22817287 A JP22817287 A JP 22817287A JP H0546410 B2 JPH0546410 B2 JP H0546410B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforcement
- shaped
- foundation
- pile
- pile head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Foundations (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は基礎杭とフーチング等の基礎部の補
強構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a reinforcement structure for foundation parts such as foundation piles and footings.
一般に基礎杭頭部はフーチング等の基礎底盤に
アンカー筋等を利用して剛に固定する。
Generally, the head of a foundation pile is rigidly fixed to the foundation base such as a footing using anchor bars.
しかし、杭頭固定として建物からの地震力が基
礎底盤を通して杭頭に作用すると、杭頭部は大き
な曲げ応力を受ける。そして杭頭部の基礎底盤へ
の呑み込み長さを短くすることにより杭頭部の固
定度をゆるめ、実質的にピン構造あるいは半剛接
構造とすることが提案されている。その場合基礎
底盤すなわちフーチング下部に割裂破壊や、剥離
破壊が生じる。そこでこれら破壊に対する補強構
造の開発が要望された。そしてこの発明は前記要
望に対処すべく創案したものである。 However, when the pile head is fixed and seismic force from the building acts on the pile head through the foundation base, the pile head receives large bending stress. It has also been proposed to loosen the fixation of the pile head by shortening the length of the pile head into the foundation base, essentially creating a pin structure or a semi-rigid structure. In this case, splitting failure or peeling failure occurs in the foundation base, that is, the lower part of the footing. Therefore, there was a need to develop a reinforcement structure to prevent these types of damage. This invention has been devised to meet the above demand.
この発明は基礎底盤に対する杭頭部の固定度を
実質的にピン構造となるようにゆるめてあり、杭
頭部外周における基礎底盤コンクリート中にリン
グ状、平面的に２重に配置してあり、さらに前記
リング状筋等に跨がつた鉛直方向のＵ状の割裂防
止用補強筋を放射状に埋設したもので、以下各発
明およびその実施例さらにその作用について図面
に基いて説明する。
In this invention, the degree of fixation of the pile head to the foundation base is loosened so that it essentially has a pin structure, and the pile head is arranged in a ring shape in double planar form in the foundation base concrete around the outer periphery of the pile head. Further, vertical U-shaped reinforcing bars for preventing splitting extending over the ring-shaped bars are embedded radially.Each invention, its embodiments, and its operation will be described below with reference to the drawings.
第１図Ａは地盤中に先に打込まれた杭を示し、
Ｂはフーチング、基礎梁等の基礎底盤を示してい
る。杭Ａの頭部は基礎底盤Ｂに対して10cm程度と
してその喰い込み長さを小さくし、その定着状態
は実質的にピン接合あるいは半剛接等のようにそ
の固定度をゆるめてある。したがつて杭Ａに水平
力が作用した場合仮想面Ｘに沿つてその下方が割
裂破壊する。そこでこの仮想面Ｘを横切つて外周
コンクリート中にリング状の割裂防止用の補強筋
１を２重に埋設してある。なお２は基礎底盤Ｂに
埋設されるベース筋であり、杭Ａと基礎底盤Ｂ間
に跨がつて必要により太〓鉄筋３を埋設する。ま
た４は逆Ｕ形のスペーサー兼用割裂防止筋を示
す。
Figure 1A shows a pile that has been driven into the ground first,
B shows the foundation base such as footings and foundation beams. The head of the pile A has a small penetration length of about 10 cm into the foundation base B, and its fixation is loosened, such as a pin connection or a semi-rigid connection. Therefore, when a horizontal force acts on the pile A, the lower part along the imaginary plane X will split and fail. Therefore, ring-shaped reinforcing bars 1 for preventing splitting are buried in double layers in the outer peripheral concrete across this virtual plane X. Reference numeral 2 denotes base reinforcing bars to be buried in the foundation base B, and thick reinforcing bars 3 are buried as necessary to span between the piles A and the foundation base B. 4 indicates an inverted U-shaped spacer and anti-splitting muscle.
第２図、第３図は前記リング状補強筋１に加え
てＵ状をなす鉛直方向の割裂防止筋５を放射状に
配筋した構造である。 2 and 3 show a structure in which, in addition to the ring-shaped reinforcing bars 1, U-shaped vertical splitting prevention bars 5 are arranged radially.
この発明は以上の構成からなり、基礎底盤に対
する杭頭部をゆるめることにより、基礎底盤に生
ずる恐れのある割裂を杭頭部外周コンクリート中
に埋設した２重のリング状補強筋でコンクリート
を拘束し、さらにはこれら補強筋を放射状をなし
てＵ状の割裂防止筋を配してあるので、より確実
な補強構造とすることができる。またＵ状の割裂
防止筋はスペーサーとなり２重のリング状補強筋
の位置決めを容易とする。
This invention consists of the above-mentioned structure, and by loosening the pile head relative to the foundation base, splitting that may occur in the foundation base is restrained by double ring-shaped reinforcing bars embedded in the concrete around the pile head. Furthermore, since these reinforcing bars are arranged radially with U-shaped splitting prevention bars, a more reliable reinforcing structure can be achieved. Further, the U-shaped splitting prevention reinforcement serves as a spacer and facilitates the positioning of the double ring-shaped reinforcing reinforcement.
第１図はこの発明の実施例の縦断面図、第２図
は他の実施例の縦断面図、第３図はその配筋状態
の平面図である。
Ａ……杭、Ｂ……基礎底盤、１……補強筋、２
……ベース筋、３……太〓鉄筋、４……スペーサ
ー兼用割裂防止筋、５……割裂防止筋。
FIG. 1 is a longitudinal sectional view of an embodiment of the invention, FIG. 2 is a longitudinal sectional view of another embodiment, and FIG. 3 is a plan view of the reinforcing structure. A...Pile, B...Foundation base, 1...Reinforcement bar, 2
...Base reinforcement, 3..Thick reinforcing bar, 4..Split prevention reinforcement that also serves as a spacer, 5..Split prevention reinforcement.
Claims (1)
あり、杭頭部外周コンクリート中にリング状の割
裂防止用補強筋が２重に埋設してあり、かつ放射
状をなしてＵ状の鉛直方向割裂防止筋が前記２重
のリング状筋に跨がつて埋設してあることを特徴
とする杭と基礎部の補強構造。1 The fixation of the pile head to the foundation base is loosened, and ring-shaped reinforcing bars to prevent splitting are buried double in the concrete around the pile head, and radial U-shaped vertical splitting is achieved. A reinforcement structure for a pile and a foundation, characterized in that a prevention reinforcement is embedded across the double ring-shaped reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22817287A JPS6471927A (en) | 1987-09-11 | 1987-09-11 | Reinforced structure of pile and foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22817287A JPS6471927A (en) | 1987-09-11 | 1987-09-11 | Reinforced structure of pile and foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6471927A JPS6471927A (en) | 1989-03-16 |
| JPH0546410B2 true JPH0546410B2 (en) | 1993-07-13 |
Family
ID=16872351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22817287A Granted JPS6471927A (en) | 1987-09-11 | 1987-09-11 | Reinforced structure of pile and foundation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6471927A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4683520B2 (en) * | 2001-09-12 | 2011-05-18 | 大成建設株式会社 | Foundation structure of new building using existing piles |
| JP4780451B2 (en) * | 2005-11-25 | 2011-09-28 | 清水建設株式会社 | Semi-rigid structure of precast concrete piles |
| JP5542519B2 (en) * | 2010-05-10 | 2014-07-09 | 鹿島建設株式会社 | Joint structure of pile head and foundation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5312106A (en) * | 1976-07-20 | 1978-02-03 | Taisei Corp | Method of treating steellpipe pile head |
| JPS6052258A (en) * | 1983-09-01 | 1985-03-25 | Alps Electric Co Ltd | Polishing machine |
| JPS61109826A (en) * | 1984-11-02 | 1986-05-28 | Nikken Sekkei:Kk | Reinforcing metal fitting for pile-foundation connection |
-
1987
- 1987-09-11 JP JP22817287A patent/JPS6471927A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5312106A (en) * | 1976-07-20 | 1978-02-03 | Taisei Corp | Method of treating steellpipe pile head |
| JPS6052258A (en) * | 1983-09-01 | 1985-03-25 | Alps Electric Co Ltd | Polishing machine |
| JPS61109826A (en) * | 1984-11-02 | 1986-05-28 | Nikken Sekkei:Kk | Reinforcing metal fitting for pile-foundation connection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6471927A (en) | 1989-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |