JPH0625418B2 - Seismic isolation pile and construction method of seismic isolation pile - Google Patents
Seismic isolation pile and construction method of seismic isolation pileInfo
- Publication number
- JPH0625418B2 JPH0625418B2 JP63032382A JP3238288A JPH0625418B2 JP H0625418 B2 JPH0625418 B2 JP H0625418B2 JP 63032382 A JP63032382 A JP 63032382A JP 3238288 A JP3238288 A JP 3238288A JP H0625418 B2 JPH0625418 B2 JP H0625418B2
- Authority
- JP
- Japan
- Prior art keywords
- seismic isolation
- pile
- elastic cushion
- cushion member
- isolation unit
- 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 - Lifetime
Links
Landscapes
- Foundations (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、既成杭に免震ユニットを一体に組付けた免震
杭およびこの免震杭の施工方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a seismic isolation pile in which a seismic isolation unit is integrally assembled to a prefabricated pile, and a method for constructing this seismic isolation pile.
従来の免震建造物は、杭地業の上に下部基礎スラブを載
せ、この下部基礎スラブ上に免震装置を介して建物の基
礎スラブを載せる工法を行っており、免震装置は現場の
地盤の特性、建造物の規模に応じてその都度設計製作し
ている。In the conventional seismic isolated building, the lower foundation slab is placed on the pile land industry, and the foundation slab of the building is placed on the lower foundation slab via the seismic isolation device. We design and manufacture each time according to the characteristics of the ground and the scale of the building.
しかし、上記従来の免震建造物によると、その都度免震
装置の設計製作が必要であり、かつ基礎スラブが二重に
なって建物の基礎スラブの高さが高くなり、従って工費
が嵩み工期が延長するという問題がある。However, according to the above-mentioned conventional seismic isolation building, it is necessary to design and manufacture a seismic isolation device each time, and the foundation slab is doubled to increase the height of the foundation slab of the building, thus increasing the construction cost. There is a problem that the construction period is extended.
また、杭頭と床版との結合部分に作用する曲げモーメン
トに対応すべく、杭頭と床版との間をピン接合とする発
明も提案されており、例えば、特開昭６２−１０７１１
７号公報においては、杭頭と床版の間に、該杭頭の断面
積より十分に小さい断面積を有する連結部を設けると共
に、杭頭、連結部、床版に補強材を貫通させ、杭頭と床
版をピン接合したものが開示されている。An invention has also been proposed in which a pin joint is made between the pile head and the floor slab in order to cope with a bending moment acting on the joint portion between the pile head and the floor slab, for example, JP-A-62-10711.
In JP-A-7, a connecting portion having a cross-sectional area sufficiently smaller than the cross-sectional area of the pile head is provided between the pile head and the floor slab, and a reinforcing material is passed through the pile head, the connecting portion, and the floor slab, A pin-jointed pile head and floor slab is disclosed.
しかし、このものは、連結部の外周に設けた緩衝材を偏
心圧縮し、床版と杭頭を回転可能とすることにより曲げ
モーメントに対応するものであって、補強材が床版およ
び杭頭を剛に連結しているので、緩衝材そのものには床
版を支承する機能はなく、従って、縦方向の力に対して
補強材が引抜力に対応するのみであり、縦方向の力に有
効に対応することができないという不具合がある。However, this one responds to the bending moment by eccentrically compressing the cushioning material provided on the outer periphery of the connecting portion to make the floor slab and the pile head rotatable, and the reinforcing material is the floor slab and the pile head. Since the shock absorbers are rigidly connected to each other, the cushioning material itself does not have the function of supporting the floor slab, and therefore the reinforcing material only responds to the pulling force against the longitudinal force, which is effective for the longitudinal force. There is a problem that it is not possible to deal with.
本発明は、上記課題を解決すべくなされたものであっ
て、免震装置をユニット化して既成杭に組付け、工費の
低減、工期の短縮、基礎スラブの高さの低下を図るもの
でありながら、横方向、縦方向の力に有効に対応するこ
とができる免震杭およびこの免震杭の施工方法を提供す
ることを目的とする。The present invention has been made to solve the above-mentioned problems, and is to unitize the seismic isolation device and assemble it to an existing pile to reduce the construction cost, shorten the construction period, and lower the height of the foundation slab. However, it is an object of the present invention to provide a seismic isolation pile and a construction method for the seismic isolation pile that can effectively cope with lateral and vertical forces.
上記目的を達成するために本発明が採用した技術手段
は、既成杭の杭頭部に鋼棒ダンパー部材と弾性クッショ
ン部材から成る免震ユニットを組付けて免震杭を構成
し、該弾性クッション部材により基礎スラブを弾性支持
したことを特徴とするもの、及び、既成杭を杭打ちし、
杭頭部に鋼棒ダンパー部材と弾性クッション部材から成
る免震ユニットを組付け、上記免震ユニットの外周を保
護部材で囲み、上記保護部材の外周に弾性クッション部
材を介在して覆土を施し、前記免震ユニット上に基礎ス
ラブを打設することを特徴とするものである。In order to achieve the above object, the technical means adopted by the present invention is to construct a seismic isolation pile by assembling a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member to the pile head of an existing pile to construct the seismic isolation pile. What is characterized by elastically supporting the foundation slab by members, and staking precast piles,
Assembling a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member on the pile head, enclosing the outer periphery of the seismic isolation unit with a protective member, and covering the outer periphery of the protective member with an elastic cushion member interposed between them. A base slab is placed on the seismic isolation unit.
免震杭は、既成の杭頭部に直接鋼棒ダンパー部材と弾性
クッション部材から成る免震ユニットを組付けるもので
あるから免震ユニットを半既成品化することができ、ま
た建物の基礎スラブは免震構造を設けていない場合と同
様、単一の基礎スラブですみ、基礎スラブの低下が可能
となる。Since the seismic isolation pile is to assemble the seismic isolation unit consisting of the steel rod damper member and the elastic cushion member directly to the existing pile head, it is possible to make the seismic isolation unit into a semi-prepared product and to construct the foundation slab of the building. As with the case where no seismic isolation structure is installed, the single foundation slab is sufficient and the foundation slab can be lowered.
基礎スラブは、該弾性クッション部材により弾性支持さ
れているので、縦方向の力は弾性クッション部材が吸収
し、一方、横方向の力は鋼棒ダンパーおよび弾性クッシ
ョンが吸収する。Since the foundation slab is elastically supported by the elastic cushion member, the longitudinal force is absorbed by the elastic cushion member, while the lateral force is absorbed by the steel rod damper and the elastic cushion.
以下本発明を図示の実施例に基づいて説明する。 The present invention will be described below based on the illustrated embodiments.
第１図は本発明にかかる免震杭の施工後の状態を示し、
免震杭１は、中空コンクリート杭等の既成杭２の杭頭部
に免震ユニット３を組付けたもので、免震ユニット３は
柱頭中心部に組付けた柱鉄筋状の鋼棒ダンパー部材４
と、この鋼棒ダンパー部材４の外周に組付けた積層ゴム
等の弾性クッション部材５とから構成され、基礎スラブ
１３は免震ユニット３を構成する弾性クッション部材５
によって弾性支持されている。FIG. 1 shows the state of the seismic isolation pile according to the present invention after construction,
The seismic isolation pile 1 is the pile head of a prefabricated pile 2 such as a hollow concrete pile, and the seismic isolation unit 3 is assembled to the seismic isolation unit 3. Four
And an elastic cushion member 5 made of laminated rubber or the like assembled on the outer periphery of the steel rod damper member 4, and the base slab 13 constitutes the seismic isolation unit 3.
It is elastically supported by.
上記免震杭１の施工方法は第２図乃至第５図に示すよう
に、まず所定場所に中空コンクリート杭等の既成杭２を
打設する（第２図）。As shown in FIGS. 2 to 5, the method for constructing the seismic isolation pile 1 is to first place a precast pile 2 such as a hollow concrete pile at a predetermined location (FIG. 2).
杭頭の中空部に柱鉄筋状の鋼棒ダンパー部材４を、杭頭
より所定長さ延出して組込み、中詰めコンクリート６を
打って固定する（第３図）。A pillar-reinforcing steel rod damper member 4 is incorporated into the hollow portion of the pile head by extending it for a predetermined length from the pile head, and is struck and fixed with filling concrete 6 (Fig. 3).
杭頭の鋼棒ダンパー部材４の外周に積層ゴム等の弾性ク
ッション部材５を組付ける（第４図）。An elastic cushion member 5 such as laminated rubber is attached to the outer periphery of the steel rod damper member 4 on the pile head (Fig. 4).
弾性クッション部材５は杭径よりやや大径の上下のプレ
ート７、８間に杭径とほぼ同径の円環状積層ゴム材等を
挾んだもので、上プレート７の上面にはアンカー９が植
設されている。なお弾性クッション部材５は円環状に一
体形成したものでなく分割したものを鋼棒ダンパー部材
４の周囲に並べてもよい。The elastic cushion member 5 is formed by sandwiching an annular laminated rubber material having a diameter substantially the same as the pile diameter between upper and lower plates 7 and 8 having a diameter slightly larger than the pile diameter. An anchor 9 is provided on the upper surface of the upper plate 7. It has been planted. The elastic cushion member 5 may not be integrally formed in an annular shape but may be divided and arranged around the steel rod damper member 4.
鋼棒ダンパー部材４と弾性クッション部材５とから成る
免震ユニット３の外周を鋼板等の保護部材１０で囲み、
次いで保護部材１０の外周に弾性クッション部材１１を
介在して免震ユニット３のほぼ上面まで覆土１２を施
し、この後免震ユニッット３上に建物の基礎スラブ１３
を打設する（第５図）。The seismic isolation unit 3 composed of the steel rod damper member 4 and the elastic cushion member 5 is surrounded by a protective member 10 such as a steel plate,
Next, an elastic cushion member 11 is provided on the outer periphery of the protective member 10 to cover the seismic isolation unit 3 with almost all the upper surface of the seismic isolation unit 3, and then the foundation slab 13 of the building is placed on the seismic isolation unit 3.
(Fig. 5).
叙上の免震杭を用いた施工によると、縦方向の地震動は
主として積層ゴム等の弾性クッション部材５の弾性によ
って吸収され、横方向の地震動は鋼棒ダンパー部材４の
縦方向鋼棒の靭性および弾性クッション部材５の積層間
の摩擦によって吸収されて基礎スラブ１３と一体の建造
物は免震され、また免震ユニット３とその周囲の地面と
の相対変位は保護部材１４０外周の弾性クッション部材
１１によって吸収される。According to the construction using the above-mentioned seismic isolation pile, the longitudinal seismic motion is mainly absorbed by the elasticity of the elastic cushion member 5 such as laminated rubber, and the lateral seismic motion is the toughness of the longitudinal steel rod of the steel rod damper member 4. And the building integrated with the foundation slab 13 is absorbed by friction between the laminated layers of the elastic cushion member 5, and the relative displacement between the seismic isolation unit 3 and the surrounding ground is the elastic cushion member on the outer periphery of the protection member 140. Absorbed by 11.
以上説明したように本発明は、既成杭の杭頭部に鋼棒ダ
ンパー部材と弾性クッション部材から成る免震ユニット
を組付けて免震杭を構成し、該弾性クッション部材によ
り基礎スラブを弾性支持したことを特徴とするので、杭
径、杭耐力、要求バネ定数に応じた各種容量の免震ユニ
ットを半既成品化して既成杭と組合せることによって、
建物の特性に適合した免震杭を低価格で提供できるもの
でありながら、地震動の横方向、縦方向の力、さらには
回転にも有効に対応することができ、十分な免震機能を
発揮する。As described above, the present invention constructs a seismic isolation pile by assembling a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member on the pile head of an existing pile, and elastically supports the foundation slab by the elastic cushion member. Since it is characterized by doing, by combining the seismic isolation unit of various capacities according to the pile diameter, pile strength, required spring constant with the prefabricated pile and combining it with the prefabricated pile,
While it is possible to provide seismic isolation piles that match the characteristics of the building at a low price, it is possible to effectively respond to lateral and vertical forces of earthquake motion, as well as rotation, and exert sufficient seismic isolation function. To do.
また、この免震杭は、既成杭を杭打ちし、杭頭部に鋼棒
ダンパー部材と弾性クッショ部材から成る免震ユニット
を組付け、上記免震ユニットの外周を保護部材で囲み、
上記保護部材の外周に弾性クッション部材を介在して覆
土を施し、前記免震ユニット上に基礎スラブを打設して
施工するから、基礎スラブは免震構造を設けない場合と
同様、単一の基礎スラブですみ、建造工事費の低減、工
期の短縮および基礎スラブの高さの低下が可能となり、
免震構造物の普及が実現される等の効果が得られる。In addition, this seismic isolation pile stakes a prefabricated pile, attaches a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member to the pile head, and surrounds the outer periphery of the seismic isolation unit with a protective member,
The soil is applied to the outer periphery of the protection member with an elastic cushion member interposed, and since the foundation slab is laid and constructed on the seismic isolation unit, the foundation slab has a single structure as in the case where no seismic isolation structure is provided. Only the foundation slab is required, the construction cost can be reduced, the construction period can be shortened, and the height of the foundation slab can be reduced.
It is possible to obtain effects such as the spread of seismic isolation structures.
図面は本発明の一実施例を示し、第１図は本発明にかか
る免震杭の施工後の状態を示した縦断面図、第２図乃至
第５図は同免震杭の施工方法を順を追って示した縦断面
図である。 １……免震杭、２……既成杭、３……免震ユニット、４
……鋼棒ダンパー部材、５……弾性クッション部材、１
０……保護部材、１１……保護部材の外周の弾性クッシ
ョン部材、１３……基礎スラブ。The drawings show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view showing a state after construction of the seismic isolation pile according to the present invention, and FIGS. 2 to 5 show a construction method of the seismic isolation pile. It is the longitudinal cross-sectional view shown in order. 1 ... Seismic isolation pile, 2 ... Prefabricated pile, 3 ... Seismic isolation unit, 4
...... Steel bar damper member, 5 …… Elastic cushion member, 1
0 ... Protective member, 11 ... Elastic cushion member around the protective member, 13 ... Basic slab.
Claims (2)
クッション部材から成る免震ユニットを組付け、該弾性
クッション部材により基礎スラブを弾性支持したことを
特徴とする免震杭。1. A seismic isolation pile, characterized in that a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member is attached to the pile head of an existing pile, and the foundation slab is elastically supported by the elastic cushion member.
部材と弾性クッション部材から成る免震ユニットを組付
け、上記免震ユニットの外周を保護部材で囲み、上記保
護部材の外周に弾性クッション部材を介在して覆土を施
し、前記免震ユニット上に基礎スラブを打設することを
特徴とする免震杭の施工方法。2. An existing pile is piled up, a seismic isolation unit consisting of a steel rod damper member and an elastic cushion member is attached to the pile head, the outer periphery of the seismic isolation unit is surrounded by a protective member, and the outer periphery of the protective member. A method for constructing a seismic isolation pile, characterized in that soil is covered with an elastic cushion member, and a foundation slab is placed on the seismic isolation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032382A JPH0625418B2 (en) | 1988-02-15 | 1988-02-15 | Seismic isolation pile and construction method of seismic isolation pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032382A JPH0625418B2 (en) | 1988-02-15 | 1988-02-15 | Seismic isolation pile and construction method of seismic isolation pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01207530A JPH01207530A (en) | 1989-08-21 |
| JPH0625418B2 true JPH0625418B2 (en) | 1994-04-06 |
Family
ID=12357403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63032382A Expired - Lifetime JPH0625418B2 (en) | 1988-02-15 | 1988-02-15 | Seismic isolation pile and construction method of seismic isolation pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625418B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703022A (en) * | 2017-01-10 | 2017-05-24 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Uplift pile with surface elastic scales and construction method of uplift pile |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207676A (en) * | 2000-01-28 | 2001-08-03 | Fujita Corp | Damping structure for building |
| JP4866492B2 (en) * | 2001-09-26 | 2012-02-01 | 大和ハウス工業株式会社 | Base-isolated building with piles |
| CN103174161A (en) * | 2013-03-18 | 2013-06-26 | 中天建设集团有限公司 | Anti-shock buttress based on rubber concrete |
| CN116290131B (en) * | 2023-04-04 | 2023-09-19 | 中铁西北科学研究院有限公司 | IGB shock insulation damper for lateral displacement of anti-slide pile self-adaptive pile in high-intensity area |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62107117A (en) * | 1985-11-01 | 1987-05-18 | Ohbayashigumi Ltd | Connection structure of pile head and floor slab |
-
1988
- 1988-02-15 JP JP63032382A patent/JPH0625418B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703022A (en) * | 2017-01-10 | 2017-05-24 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Uplift pile with surface elastic scales and construction method of uplift pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01207530A (en) | 1989-08-21 |
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