JPS59187922A - Pile foundation - Google Patents
Pile foundationInfo
- Publication number
- JPS59187922A JPS59187922A JP6280883A JP6280883A JPS59187922A JP S59187922 A JPS59187922 A JP S59187922A JP 6280883 A JP6280883 A JP 6280883A JP 6280883 A JP6280883 A JP 6280883A JP S59187922 A JPS59187922 A JP S59187922A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- footing
- buffer layer
- sand
- pile foundation
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は土木、建祭構造物の杭基礎、特に杭頭部の構
造に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to civil engineering and pile foundations for construction structures, particularly to the structure of pile heads.
従来技術
従来、杭頭部の構造については、杭頭部を剛結合したも
のと、杭頭部の回転を可能としたヒンジ結合のものがあ
る。しかし、鋼結合の場合、杭本体に生ずる応力、特に
杭頭部にかかる応力が大きく、地震その他の水平力に対
してはフーチングとの結合部に補強が必要となり、また
曲げモーメント、せん断力、軸力のすべてに対抗できる
ように設計しなければならない。PRIOR ART Conventionally, there are two types of pile head structures: one in which the pile head is rigidly connected and the other in which the pile head is hinged to allow rotation. However, in the case of steel connections, the stress generated in the pile body, especially the stress applied to the pile head, is large, and the connection with the footing requires reinforcement against earthquakes and other horizontal forces. It must be designed to withstand all axial forces.
そのため、ヒンジ結合として例えばフーチングの下面に
ころ等のベアリングを介在させたり、フーチングの本体
と杭頭部を分離し、杭頭部が回転可能な球面状の凹凸で
ヒンジ状に連結したものなどが工夫されている。これら
により杭頭部の補強等を軽減することができるが、完全
なヒンジ結合とすることは困難であり、設計、施工が難
しくなるといった欠点がある。For this reason, hinge connections may be made, for example, by interposing a bearing such as a roller on the bottom surface of the footing, or by separating the footing body and the pile head and connecting them in a hinge-like manner with a spherical unevenness that allows the pile head to rotate. It has been devised. Although these methods can reduce the need for reinforcement of the pile head, they have the disadvantage that it is difficult to achieve a perfect hinge connection, making design and construction difficult.
発明の目的
この発明は上述のような事情の下に発明されたもので、
高圧力下での砂と鋼材の摩擦、水平力が作用したときの
砂粒子の挙動等を利用して、信頼性が高くかつ経済的な
杭基礎を提供することを目的としている＝
発明の構成
以下、この発明の杭基礎を図示した実施例に基づいて説
明する。Purpose of the invention This invention was invented under the above circumstances.
The purpose is to provide a highly reliable and economical pile foundation by utilizing the friction between sand and steel under high pressure, the behavior of sand particles when horizontal force is applied, etc. = Structure of the invention EMBODIMENT OF THE INVENTION Hereinafter, the pile foundation of this invention will be explained based on the illustrated embodiment.
実施例は独立フーチングの場合を示したもので、鉄筋コ
ンクリート製のフーチング１の下面に上部鋼板２を一体
に取シ付けである。なお、この実施例では上部鋼板２の
上面にあらかじめアンカー筋６を溶接等によ勺突設して
おき、必要な配筋を施した後、現場打コンクリートによ
りフーチング１と一体化している。The embodiment shows the case of an independent footing, in which an upper steel plate 2 is integrally attached to the lower surface of a footing 1 made of reinforced concrete. In this embodiment, anchor reinforcements 6 are preliminarily provided on the upper surface of the upper steel plate 2 by welding or the like, and after the necessary reinforcement arrangement, the anchor reinforcements 6 are integrated with the footing 1 by pouring concrete on site.
一方、このフーチング１を支持する複数本の鋼管杭４の
上端には下部鋼板６が溶接によって取り付けられておシ
、上述した上部鋼板５と中間の緩衝層５を介して対向し
ている。On the other hand, a lower steel plate 6 is attached by welding to the upper ends of the plurality of steel pipe piles 4 that support the footing 1, and faces the above-mentioned upper steel plate 5 with an intermediate buffer layer 5 interposed therebetween.
緩衝層５は砂または砂利等あるいはこれらを混合して所
定厚敷設したもので、上部構造物の荷重を直接、鋼管杭
４に伝達するとともに、地震等によりフーチングあるい
は上部構造物に作用した水平力を粒子間の摩擦力の形で
伝達する。The buffer layer 5 is made of sand, gravel, etc. or a mixture of these laid down to a predetermined thickness, and it transmits the load of the upper structure directly to the steel pipe pile 4, and also absorbs the horizontal force acting on the footing or the superstructure due to earthquakes, etc. is transmitted in the form of frictional force between particles.
この緩衝層５の厚さは上部構造物の荷重、フーチング１
の接地面積、支持地盤の深さその他の条件に応じて最適
なものを設計する。また緩衝層５が地下水位以下にある
場合には、緩衝層５の周囲をフレキシブルな防水材料で
覆い、砂または砂利の中に水分が浸入することを防ぐも
のとする。The thickness of this buffer layer 5 is determined by the load of the upper structure, the footing 1
The optimal one is designed according to the ground contact area, depth of supporting ground, and other conditions. Further, when the buffer layer 5 is located below the groundwater level, the buffer layer 5 is covered with a flexible waterproof material to prevent moisture from penetrating into the sand or gravel.
なお、以上独立フーチングについて述べたが、地中梁で
連結した場合やへた基礎の場合にも同様に適用すること
ができる。Although we have described independent footings above, the same can be applied to cases where they are connected by underground beams or to the case of a flat foundation.
発明の効果
■ 上部構造物を支持する高圧力下において、上部鋼板
と下部鋼板との間に砂または砂利からなる緩衝層を介在
させであるため、水平力に対しても摩擦力以外の力は伝
わらない構造となっている。Effects of the invention ■ Under high pressure to support the upper structure, a buffer layer made of sand or gravel is interposed between the upper steel plate and the lower steel plate, so that no force other than frictional force is applied even to horizontal forces. It has a structure that does not convey information.
■ 砂または砂利の粒子の破砕現象により、水平力に対
して緩衝層でエネルギーを吸収することができる。■ Due to the phenomenon of fragmentation of sand or gravel particles, energy can be absorbed in the buffer layer against horizontal forces.
■ フーチングと杭頭部が緩衝層を介して分離している
ため、回転を許し杭頭部は固定条件でなくなる・従って
杭頭部に過大な曲げモーメント等が作用する恐れがなく
、特に補強を必要としない。■ Because the footing and the pile head are separated via a buffer layer, rotation is allowed and the pile head is no longer fixed.Therefore, there is no risk of excessive bending moment being applied to the pile head, and special reinforcement is not required. do not need.
■ 構造が比較的単純であるため施工性も良く、経済的
である。■ The structure is relatively simple, making it easy to construct and economical.
図面はこの発明の杭基礎の一実施例を示す縦断面図であ
る。
１・・フーチング、２・・上部鋼板、３・・下部鋼板、
４・・鋼管杭、５・・緩衝層、６・・アンカー筋。
手続補正書
昭和５８年４月２１日
２、発明の名称 杭 基 礎
３、 補正をする者
事件と。関係 ％許出Ｍ人
住 所 岸 １） 英 明□、ア（□１，
１）中 柳之助
４、代理人
氏 名 （７００９） 弁理士 久 門 知
１′バー、＋１
５、 補正命令の日付 自 発 補 正８ 補正の
内容 別紙の通り
（１）明細書第３頁第８行目の「０９．一体化している
。」の次に１以下の文章を挿入する。
［この外、上部鋼板２として、例えば上面に凹凸を有す
る縞鋼板等を用いてフーチング１と上部鋼板２の一体化
を図ることもできる。」（２） 明細岩：第３頁第１
１行目の「上部鋼板３」を「上部鋼板２」と補正する。The drawing is a longitudinal sectional view showing an embodiment of the pile foundation of the present invention. 1...Footing, 2...Upper steel plate, 3...Lower steel plate,
4. Steel pipe pile, 5. Buffer layer, 6. Anchor bar. Procedural Amendment April 21, 1982 2, Title of Invention Pile Foundation 3, Case of Person Who Makes Amendment. Relationship % Authorized M person Address Kishi 1) Hideaki □, A (□1,
1) Yanaginosuke Naka 4, Agent name (7009) Patent attorney Tomo Hisakado 1' Bar, +1 5, Date of amendment order Voluntary amendment 8 Contents of amendment As attached (1) Page 3 of the specification Insert 1 or less sentences next to "09. Unified." on the 8th line. [In addition, the footing 1 and the upper steel plate 2 may be integrated by using, for example, a striped steel plate having unevenness on the upper surface as the upper steel plate 2. ” (2) Seiwa: Page 3, No. 1
"Upper steel plate 3" in the first line is corrected to "upper steel plate 2."
Claims (1)
複数本の鋼管杭を溶接した下部銅板との間に、砂または
砂利からなる緩衝層を介在させであることを特徴とする
杭基礎。 （２）上部鋼板の上面にはフーチング中に埋設されるア
ンカー筋が突設されている特許請求の範囲第１項記載の
杭基礎。[Claims] (A buffer layer made of sand or gravel is interposed between the upper steel plate attached to the lower surface of the refooting and the lower copper plate to which a plurality of steel pipe piles are welded to the lower surface. Pile foundation characterized by: (2) The pile foundation according to claim 1, wherein anchor reinforcements embedded in the footing are provided protruding from the upper surface of the upper steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6280883A JPS59187922A (en) | 1983-04-09 | 1983-04-09 | Pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6280883A JPS59187922A (en) | 1983-04-09 | 1983-04-09 | Pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59187922A true JPS59187922A (en) | 1984-10-25 |
Family
ID=13211005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6280883A Pending JPS59187922A (en) | 1983-04-09 | 1983-04-09 | Pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187922A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007332688A (en) * | 2006-06-16 | 2007-12-27 | Japan Pile Corp | Pile head structure |
| JP2015183371A (en) * | 2014-03-20 | 2015-10-22 | 公益財団法人鉄道総合技術研究所 | Continuous ground improvement method in support base of linear structure having spread foundation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628950A (en) * | 1979-08-06 | 1981-03-23 | See Derufuosu Jiru | Vibration and impact separating system |
-
1983
- 1983-04-09 JP JP6280883A patent/JPS59187922A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628950A (en) * | 1979-08-06 | 1981-03-23 | See Derufuosu Jiru | Vibration and impact separating system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007332688A (en) * | 2006-06-16 | 2007-12-27 | Japan Pile Corp | Pile head structure |
| JP2015183371A (en) * | 2014-03-20 | 2015-10-22 | 公益財団法人鉄道総合技術研究所 | Continuous ground improvement method in support base of linear structure having spread foundation |
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