JPS62197524A - Reinforcing structure for foundation slab in pile head joint - Google Patents
Reinforcing structure for foundation slab in pile head jointInfo
- Publication number
- JPS62197524A JPS62197524A JP3722186A JP3722186A JPS62197524A JP S62197524 A JPS62197524 A JP S62197524A JP 3722186 A JP3722186 A JP 3722186A JP 3722186 A JP3722186 A JP 3722186A JP S62197524 A JPS62197524 A JP S62197524A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- foundation slab
- slab
- head
- reinforcing bars
- 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.)
- Pending
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 2
- 239000011210 fiber-reinforced concrete Substances 0.000 abstract 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は杭頭接合部における基−スラブの補強構造に係
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a base-slab reinforcement structure at a pile cap joint.
（従来の技術）
既製杭を用いた杭基礎の杭頭接合部は一般に剛接合とし
て設計されているが、基礎スラブの補強については明確
な方法がなく、杭頭周りの基礎スラブには無補強の場合
すらあった。(Prior technology) Pile cap joints in pile foundations using ready-made piles are generally designed as rigid joints, but there is no clear method for reinforcing the foundation slab, and the foundation slab around the pile cap is not reinforced. There were even cases of
（発明が解決しようとする問題点）
地震力等の水平力が杭基礎に作用すると杭（勾と基礎ス
ラブ（Ｅｌとの接合部には第３図に示すような応力が生
じ、杭（Ａ）がその曲げ耐力を十分に発揮する場合、基
礎スラブ（Ｂ）Ｋ大きな反力が加わり、杭（んが破壊す
る前に基礎スラブ（均が破壊して、接合部としてはその
機能を喪失することが考えられる。(Problem to be solved by the invention) When a horizontal force such as an earthquake force acts on a pile foundation, stress as shown in Fig. 3 is generated at the joint between the pile (A ) fully exerts its bending strength, a large reaction force is applied to the foundation slab (B), and the foundation slab (B) is destroyed before the pile (B) is destroyed, and it loses its function as a joint. It is possible that
従って杭頭接合部を構成する基礎スラブが破壊しないよ
うに十分に補強されなければならないのＫもかかわらず
、前述のように基礎スラブの補強に明確な手段がなく、
無補強の場合すらあるのが現状である。Therefore, the foundation slab that makes up the pile cap joint must be sufficiently reinforced to prevent it from collapsing.However, as mentioned above, there is no clear means for reinforcing the foundation slab.
The current situation is that there are even cases without reinforcement.
（問題点を解決するための手段）
本発明はこのような実情に鑑みて提案されたもので、杭
頭部が埋設された基礎スラブを鋼繊維コンクリートより
構成するとともに、同コンクリート中に前記杭頭部外周
に配設された同心円状の補強鉄筋を埋設してなることを
特徴とする杭頭接合部における基礎スラブの補強構造に
係り、その目的とする処は、基礎スラブの杭頭接合部を
地震力等の水平力に対して効果的に補強する構造上合理
的な補強構造を供する点にある。(Means for Solving the Problems) The present invention was proposed in view of the above-mentioned circumstances, and consists of a foundation slab in which the pile heads are buried made of steel fiber concrete, and the piles are embedded in the concrete. The reinforcement structure of the foundation slab at the pile cap joint is characterized by embedding concentric reinforcement reinforcing bars arranged around the outer circumference of the head, and its purpose is to strengthen the foundation slab at the pile cap joint. The purpose of this invention is to provide a structurally rational reinforcement structure that effectively reinforces the structure against horizontal forces such as earthquake forces.
（作 用）
本発明においては前記したように、杭頭接合部における
基礎スラブ内に、杭頭部外周に配設された同心円状の補
強鉄筋が埋設されているので、同鉄筋によって杭に伝達
される地震力等の水平力及び杭頭部でのてこ反力に抵抗
する。(Function) As described above, in the present invention, concentric reinforcing reinforcing bars arranged around the outer periphery of the pile head are buried in the foundation slab at the pile cap joint, so that the reinforcement is transmitted to the pile by the reinforcing bars. resists horizontal forces such as earthquake forces and lever reaction forces at the pile head.
また基礎スラブは鋼繊維コンクリートより構成されてい
るので、基礎スラブコンクリートのひび割れ防止促進と
、靭性が確保される。更に杭主筋の定着力が増加される
。Furthermore, since the foundation slab is made of steel fiber concrete, cracking prevention and toughness of the foundation slab concrete are ensured. Furthermore, the anchoring force of the pile main reinforcement is increased.
（発明の効果）
このように本発明によれば基礎スラブが鋼繊維コンクリ
ートより構成されるとともに、同スラブに埋設された杭
頭部の外周に同心円状の補強鉄筋が配設されることによ
って、杭頭接合部における基礎スラブが補強され、地震
力等の水平力が杭基礎に作用した際、杭と基礎スラブと
の接合部に作用する応力によって同接合部の破壊される
惧れかない。(Effects of the Invention) According to the present invention, the foundation slab is made of steel fiber concrete, and concentric reinforcing reinforcing bars are arranged around the outer circumference of the pile head buried in the slab. When the foundation slab at the pile head joint is reinforced and a horizontal force such as an earthquake force acts on the pile foundation, there is a risk that the joint will be destroyed by the stress acting on the joint between the pile and the foundation slab.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
囚は杭、（均は同杭（Ａｌの杭頭部が接合された基礎ス
ラブで、同スラブ（Ｂｌは鋼繊維コンクリート（１）よ
り構成され、同コンクリート（１）中に１杭頭部の外周
に配設された同心円状の補強鉄筋（２）が埋設されてい
る。(Bl is a foundation slab to which an Al pile head is joined, and the same slab (Bl is composed of steel fiber concrete (1), with one pile head in the same concrete (1). Concentric reinforcing reinforcing bars (2) arranged around the outer periphery are buried.
なお同心円状の補強鉄筋（２）は、杭躯体と同心状忙配
設された円環状鉄筋（２ａ）と放射状に配設された輻方
向の鉄筋（２ｂ）とを連結して構成されている。The concentric reinforcing bars (2) are constructed by connecting circular reinforcing bars (2a) that are arranged concentrically with the pile frame and radial reinforcing bars (2b) that are arranged radially. .
図中、（３）は杭主筋、（４）は杭（ＡＩにおゆる杭頭
部の中詰め補強コンクリートで、基礎スラブ（Ｂ）の鋼
繊維コンクＩＪ −トの一部が杭頭部の中空部に填装さ
れている。In the figure, (3) is the main reinforcement of the pile, (4) is the reinforced concrete filled in the pile head (AI), and part of the steel fiber concrete IJ-t of the foundation slab (B) is at the pile head. It is loaded into the hollow part.
図示の実施例は前記したように構成されているので、杭
頭部に配設された同心円状の補強鉄筋（２）によって地
震力等の水平力が作用した際における基礎スラブ（均内
に発生する引張応力に対して抵抗し、また基礎スラブ（
Ｂｌに使用された鋼繊維コンクリ−Ｎｉｌによって基礎
スラブ（Ｂｌの靭性を増大し、ひび割れの発生を防止す
るとともに杭主筋（３）の定着性能を向上し、基礎スラ
ブ（Ｂｌを水平力に対して有効に補強し、同基礎スラブ
（Ｂｌと杭頭部との接合部の破壊を防止するものである
。The illustrated embodiment is configured as described above, so that when a horizontal force such as an earthquake force is applied to the foundation slab by the concentric reinforcing reinforcing bars (2) installed at the pile head, It resists tensile stresses that cause the foundation slab (
The steel fiber concrete Nil used in Bl increases the toughness of the foundation slab (Bl), prevents cracking, improves the anchoring performance of the main pile reinforcement (3), and improves the stability of the foundation slab (Bl) against horizontal forces. This effectively strengthens the foundation slab and prevents the joint between the foundation slab (Bl) and the pile head from breaking.
以上本発明を実施例九ついて説明したが、本発明は勿論
このような実施例にだけ局限されるものではな（、本発
明の精神を逸脱しない範囲内で種々の設計の改変を施し
うるものである。Although the present invention has been described above with reference to nine embodiments, the present invention is, of course, not limited to these embodiments (the design may be modified in various ways without departing from the spirit of the present invention). It is.
第１図は本発明に係る杭頭接合部における１に礎スラブ
の補強構造の一実施例を示す縦断面図、第２図は同心円
状の補強鉄筋の平面図、第３図は水平力の作用時におけ
る杭頭接合部内の応力分布図である。
ｆＡｌ・・・杭 （Ｅｌ・・・基礎スラ
ブ（１１・・・Ｗ４繊維コンクリート
（２）・・・同心円状の補強鉄筋
代即人 弁理士 岡 本 市 文
外２名
第３図Fig. 1 is a vertical cross-sectional view showing one embodiment of the foundation slab reinforcement structure at the pile cap joint according to the present invention, Fig. 2 is a plan view of concentric reinforcement reinforcing bars, and Fig. 3 is a horizontal sectional view of It is a stress distribution map in the pile cap joint part at the time of action. fAl...Pile (El...Foundation slab (11...W4 fiber concrete (2)...Concentric reinforcing bars paid immediately Patent attorney Okamoto City, 2 outsiders Figure 3)
Claims (1)
り構成するとともに、同コンクリート中に前記杭頭部外
周に配設された同心円状の補強鉄筋を埋設してなること
を特徴とする杭頭接合部における基礎スラブの補強構造
。A pile head connection characterized in that a foundation slab in which a pile head is buried is made of steel fiber concrete, and concentric reinforcing reinforcing bars arranged around the outer periphery of the pile head are buried in the concrete. Reinforcement structure of foundation slab in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3722186A JPS62197524A (en) | 1986-02-24 | 1986-02-24 | Reinforcing structure for foundation slab in pile head joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3722186A JPS62197524A (en) | 1986-02-24 | 1986-02-24 | Reinforcing structure for foundation slab in pile head joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62197524A true JPS62197524A (en) | 1987-09-01 |
Family
ID=12491532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3722186A Pending JPS62197524A (en) | 1986-02-24 | 1986-02-24 | Reinforcing structure for foundation slab in pile head joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62197524A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372315A (en) * | 2001-06-12 | 2002-12-26 | Yoshihiro Okuyama | Method and device for practically utilizing subterranean heat by utilizing foundation pile |
| CN111395342A (en) * | 2020-03-26 | 2020-07-10 | 中国一冶集团有限公司 | Construction method for cast-in-place pile broken pile head, auxiliary isolation net and preparation method of auxiliary isolation net |
-
1986
- 1986-02-24 JP JP3722186A patent/JPS62197524A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372315A (en) * | 2001-06-12 | 2002-12-26 | Yoshihiro Okuyama | Method and device for practically utilizing subterranean heat by utilizing foundation pile |
| CN111395342A (en) * | 2020-03-26 | 2020-07-10 | 中国一冶集团有限公司 | Construction method for cast-in-place pile broken pile head, auxiliary isolation net and preparation method of auxiliary isolation net |
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