JPH01203515A - Earthquake-proof pile and its construction - Google Patents
Earthquake-proof pile and its constructionInfo
- Publication number
- JPH01203515A JPH01203515A JP2531988A JP2531988A JPH01203515A JP H01203515 A JPH01203515 A JP H01203515A JP 2531988 A JP2531988 A JP 2531988A JP 2531988 A JP2531988 A JP 2531988A JP H01203515 A JPH01203515 A JP H01203515A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- earthquake
- ground
- underground
- outer periphery
- 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
- 238000010276 construction Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims abstract description 34
- 230000002265 prevention Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 abstract description 7
- 238000009412 basement excavation Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 229920001875 Ebonite Polymers 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、基礎杭と地盤との振動の伝達を遮断して、
構造物への振動の伝播又は構造物からの振動の伝播を低
減する防震杭およびその工法に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention blocks the transmission of vibration between the foundation pile and the ground,
The present invention relates to an earthquake prevention pile and its construction method that reduces the propagation of vibrations to or from a structure.
（従来の技術）
周知のように、建物の付近に撮動を発生する要因、例え
ば鉄道、道路などがある場合、建物の基礎の形式によら
ず、建物に振動が伝播されることになって、住民の生活
環境を損うばかりでなく、電子機器などを使用するオフ
ィスビル等では重大な問題となる。また構造物内に振動
源がある場合に、その振動が外界へ伝播して環境を破壊
する場合がある。(Prior Art) As is well known, if there are factors that cause imaging near a building, such as a railroad or road, vibrations will be propagated to the building regardless of the type of foundation of the building. This not only damages the living environment of residents, but also poses a serious problem in office buildings where electronic devices are used. Furthermore, if there is a vibration source within a structure, the vibration may propagate to the outside world and destroy the environment.
このため、従来撮動の発生源に近い建物では、基礎およ
び建物構造を堅牢なものとしている。For this reason, conventionally, buildings close to the source of imaging have strong foundations and building structures.
（発明が解決しようとする問題点）
しかしながら、構造を堅牢なものとしても、振動の伝播
は防止できないので、十分な防諜性能を得ることは困難
であった。(Problems to be Solved by the Invention) However, even if the structure is made robust, the propagation of vibrations cannot be prevented, so it has been difficult to obtain sufficient counterintelligence performance.
この発明は上記問題点を解決することを基本的な目的と
し、基礎杭と地盤との振動の伝播の受授を阻止して防諜
を図る防震杭およびその工法を提供するものである。The basic purpose of the present invention is to solve the above-mentioned problems, and to provide an earthquake prevention pile and a method for constructing the same, which prevent transmission of vibrations between the foundation pile and the ground for counterintelligence.
（問題点を解決するための手段）
上記目的を達成するため、本願発明の防震杭は地中杭の
外周に、防震材が配設されたことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the seismic isolation pile of the present invention is characterized in that an earthquake isolation material is disposed around the outer periphery of the underground pile.
また、本願発明の第１の防震杭工法は、地中に杭を施工
した後、杭の外周部を掘削し、この外周部へ防露材を挿
入設置することを特徴とする。The first seismic pile construction method of the present invention is characterized in that after the pile is constructed in the ground, the outer periphery of the pile is excavated, and a dew-proofing material is inserted and installed in this outer periphery.
さらに、第２の防震杭工法では、杭本体の外周に予め防
震杭を配設し、この防震杭を地中の杭穴に埋設すること
を特徴とする。Furthermore, the second earthquake-proof pile construction method is characterized in that a seismic-proof pile is arranged in advance around the outer periphery of the pile body, and this seismic-proof pile is buried in a pile hole in the ground.
上記に用いられる防露材は、基礎杭と地盤との振動の伝
播を阻止するべく、その両面にせん断力が作用した場合
、ある変位の中では比較的自由に変形することのできる
構造、材料を使用する。The dew protection material used above is a structure and material that can deform relatively freely within a certain displacement when shear force is applied to both sides of the foundation pile in order to prevent the propagation of vibrations between the foundation pile and the ground. use.
防霧効果を発揮できる構造としては、潤滑材を塗布した
２枚の板を合わせるこ′とが考えられる。A conceivable structure that can exhibit a fog-proofing effect is to combine two plates coated with a lubricant.
例えば、２枚の硬質ゴム板の間にｌＩｌ！１８Ｉ油を塗
布して複合板とする。For example, lIl! between two hard rubber plates! Apply 18I oil to make a composite board.
ただし、振動による変位速度は非常に早く、現在一般に
使用されているＦｌｌＷ４材は粘弾性体であって、この
ように高速度の変位に対しては弾性体のごとき挙動を示
し、変位速度によって防露材としての効果が若干小さく
なる。However, the displacement speed due to vibration is very fast, and the FLLW4 material currently in general use is a viscoelastic material, and it behaves like an elastic material against such high-speed displacement, and is prevented by the displacement speed. The effect as a dew material will be slightly reduced.
これに対し、硬質ゴム板間にスポンジ状のものを挟む構
造とすることもできる。On the other hand, it is also possible to adopt a structure in which a sponge-like material is sandwiched between hard rubber plates.
スポンジ状の材料では、独立気泡を有し、土中における
水分を吸収して粘弾性化することがなく、また、圧縮・
せん断に対し、はとんど力を要しない弾性体となる。例
えばスポンジ状のものとしてウレタンフオームを選択す
る。Sponge-like materials have closed cells, do not absorb moisture in the soil and become viscoelastic, and are resistant to compression and
It becomes an elastic body that does not require much force against shearing. For example, urethane foam is selected as the sponge-like material.
尚、せん断変形に対する追従という点では、−般に軽い
もの程すぐれている。In addition, in terms of following shear deformation, the lighter the material is, the better it is.
また、防露材としては、上記のように一体物に限定され
るものではなく、スチレンビーズなどのように粒状物を
用いることも可能である。Further, the dew-proofing material is not limited to an integral material as described above, but it is also possible to use a granular material such as styrene beads.
上記防震杭を得るための第１の防震杭工法では、既製杭
または現場打ち杭からなる杭を地中に設置した後、杭本
体の外周部を筒状のケーシングなどで掘削する。この掘
削部へ、前記防露材を挿入、設置する。防露材は、例え
ば予め板状円筒状に形成しておき、これを掘削部へ押し
込む。また、二液性の材料を用い、これを掘削部に流し
込んだ後、発泡、硬化反応などにより、防露材を得るこ
とも可能である。In the first earthquake prevention pile construction method for obtaining the earthquake prevention pile, a pile consisting of a ready-made pile or a cast-in-place pile is installed in the ground, and then the outer periphery of the pile body is excavated with a cylindrical casing or the like. The dew-proofing material is inserted and installed into this excavated portion. The dew-proofing material is formed in advance into a plate-like cylindrical shape, for example, and is pushed into the excavation part. It is also possible to obtain a dew-proofing material by using a two-component material, pouring it into the excavation area, and then performing foaming, curing reactions, etc.
また、第２の防震杭工法では、杭本体の外周部 ′へ予
め防露材を配設した防震杭を用意しておき、これを地中
に形成した杭穴に埋設する。In the second earthquake-proof pile construction method, a seismic-proof pile is prepared in advance with a dew-proofing material provided on the outer periphery of the pile body, and is buried in a pile hole formed in the ground.
（作 用）
この発明の防謂杭によれば、防露材がぜん断変形に追従
して変形し、地中杭の外周面と地盤との振動の連絡が断
たれ、振動（特に上下“振動）が、両者間で伝播される
のを阻止する。(Function) According to the anti-corrosion pile of the present invention, the anti-dew material deforms following shear deformation, and vibration communication between the outer peripheral surface of the underground pile and the ground is cut off, and vibration (especially vertical “vibration”) is reduced. ) is prevented from being propagated between the two.
したがって、鉄道や道路などで発生した地盤表層の振動
が、基礎杭からさらに基礎上の建物へと伝播する゛のが
阻止される。Therefore, vibrations in the ground surface layer generated by railways, roads, etc. are prevented from propagating from the foundation piles to the buildings on the foundations.
また、振動発生源である鉄道数や道路の基礎杭として防
震杭を用いた場合には、基礎杭に伝わっ・た振動がさら
に地盤表層に伝わって、振動が周囲伝播するのを防止す
る。 ・
また、第１の防震杭工法によれば、現場での簡単な作業
により、上記の防震杭が得られる。ざらに、第２の防震
杭工法によれば・、予め杭本体の外周に防露材を配置し
ておけるので、より簡単な作業で防震杭を構築すること
ができる。In addition, when seismic piles are used as foundation piles for railways and roads that are sources of vibration, the vibrations transmitted to the foundation piles are further transmitted to the ground surface layer, preventing the vibrations from propagating to the surrounding area. - Also, according to the first earthquake prevention pile construction method, the above earthquake prevention pile can be obtained by simple work on site. In general, according to the second earthquake-proof pile construction method, since the dew-proofing material can be placed in advance around the outer periphery of the pile body, the earthquake-proof pile can be constructed with simpler work.
（実施例）
以下にこの発明の一実施例を添付図面に基づき説明する
。(Example) An example of the present invention will be described below with reference to the accompanying drawings.
所望位置の地盤１に、常法により現場打ちで地
□中杭２を構築する。尚、図中２ａは鉄筋部である。Place the ground on the ground 1 at the desired location by pouring it on-site using the usual method.
□Build medium pile 2. In addition, 2a in the figure is a reinforcing bar part.
次いで、地中杭２の外周部に嵌合する大きさの筒状の特
殊ケーシング３を地中杭２の上部に設置する。このケー
シング３は鋼製で、先端部に掘削刃３ａが取り付けであ
る。また掘削土を泥土化して排出するために、清水を注
入するパイプ（図示しない）が、長尺方向に沿って筒壁
内に形成されており、先端部で開口している。Next, a special cylindrical casing 3 having a size that fits around the outer circumference of the underground pile 2 is installed on top of the underground pile 2. This casing 3 is made of steel, and a digging blade 3a is attached to the tip. Further, in order to turn the excavated soil into mud and discharge it, a pipe (not shown) for injecting fresh water is formed in the cylinder wall along the longitudinal direction, and is open at the tip.
このケーシング３を杭打ち機（８示゛しない）に装着し
、オーガーマシン（図示しない）によって回転させ、地
中杭２の外周を掘削して地盤１と地中杭２との簡に所定
のＳ簡を形成する。This casing 3 is attached to a pile driver (8 not shown), rotated by an auger machine (not shown), and the outer periphery of the underground pile 2 is excavated to easily connect the ground 1 and the underground pile 2 to a predetermined position. Form an S.
この掘削に際しては、ケーシング３の先端からパイプを
通し″′Ｃ清水を注入し、掘削土を泥土化して排出し掘
削を補助する。During this excavation, fresh water is injected through a pipe from the tip of the casing 3, and the excavated soil is turned into mud and discharged to assist the excavation.
ここで、ケーシング３による掘削の深さは、適宜室める
ことができるが、地中杭２の根部２ｂは、鉛直方向の支
持力を確保するため、未掘削部とするのが望ましい。Here, the depth of excavation by the casing 3 can be adjusted as appropriate, but it is desirable that the root portion 2b of the underground pile 2 be an unexcavated portion in order to ensure vertical supporting force.
掘削終了後には、前記ケーシング３を地盤１から扱き取
る。次いで、この掘削部に板状、円筒状などに成形した
防露材４を挿入する。この防露材４は、硬質ゴム４ａ、
４ａ問に独立気泡構造のウレタンフオーム４ｂを積層し
た複合材からなり、掘削部の全長に亘り挿入する。After the excavation is completed, the casing 3 is removed from the ground 1. Next, a dew-proofing material 4 formed into a plate shape, a cylinder shape, etc. is inserted into this excavated portion. This dew-proofing material 4 includes hard rubber 4a,
It is made of a composite material in which urethane foam 4b with a closed cell structure is laminated on 4a, and is inserted over the entire length of the excavated part.
尚、防震杭４の挿入前、すなわちケーシング３による掘
削前に、掘削部へ硬化材を注入しておき、防露材４を挿
通した後に硬化させることもできる。It is also possible to inject a hardening material into the excavated portion before inserting the seismic pile 4, that is, before excavating with the casing 3, and harden it after the dew protection material 4 is inserted.
尚、上記実施例では、地中杭は現場打ちで施工したが、
既製杭を杭穴に貫入して施工したものでもよい。In addition, in the above example, the underground piles were constructed by casting on site.
It may be constructed by inserting ready-made piles into the pile holes.
また、他の工法として、既製杭５の外周に予め防露材４
を配設しておき、この防震杭６を地中に形成した杭穴７
に埋設する。In addition, as another construction method, a dew-proofing material 4 is placed on the outer periphery of the ready-made pile 5 in advance.
The earthquake prevention pile 6 is placed in a pile hole 7 formed in the ground.
to be buried.
上記により得られた防震杭は、地中杭もしくは、地盤が
上下に振動する際に、防露材４のウレタンフオーム４ｂ
が弾性変形して、せん断変形に追従するので、これに接
する地盤もしくは地中杭に伝わる上下振動を低減させる
。The earthquake prevention pile obtained above is an underground pile, or when the ground vibrates up and down, the urethane foam 4b of the dew protection material 4
Because it deforms elastically and follows shear deformation, it reduces vertical vibrations transmitted to the ground or underground piles in contact with it.
また、水平振動においても同様に振動伝播を妨げる。In addition, horizontal vibrations similarly impede vibration propagation.
尚、防震杭の工法としては、上記２つの工法に限定され
るものではなく、要は地中杭の外周に防露材が配置され
た防震杭を構築できるものであればよい。Incidentally, the method of constructing the earthquake prevention pile is not limited to the above two construction methods, and any method may be used as long as it can construct an earthquake prevention pile in which a dew prevention material is arranged around the outer periphery of the underground pile.
（発明の効果）
以上説明したように、本願発明の防震杭によれば、地中
杭の外周に防震杭を配設したので、地中杭と地盤との撮
動の伝播を有効に防止することができる。(Effects of the Invention) As explained above, according to the earthquake prevention pile of the present invention, since the earthquake prevention pile is arranged around the outer periphery of the underground pile, it is possible to effectively prevent the propagation of imaging between the underground pile and the ground. be able to.
したがって、建物の防撮性能を向上させることができ、
また振動源に用いた場合には、周囲への撮動の伝播を防
止することができるという効果がある。Therefore, the anti-photography performance of the building can be improved,
Furthermore, when used as a vibration source, it has the effect of preventing the propagation of imaging to the surroundings.
また、本願発明の第１の防露杭工法によれば、地中に地
中杭を施工した後、地中杭の外周部を掘削し、この外周
部へ防露材を挿入設置するので、簡単な作業で防震杭を
構築することができる。Further, according to the first dew-proof pile construction method of the present invention, after constructing the underground pile underground, the outer periphery of the underground pile is excavated, and the dew-proofing material is inserted and installed into this outer periphery. Earthquake prevention piles can be constructed with simple work.
さらに、本願発明の第２の防露工法によれば、予め杭本
体の外周に防露材を配設し、この防震杭を地中の杭穴に
埋設するので、予め用意した防震杭を効率よく施工する
ことができるという効果がある。Furthermore, according to the second dew prevention construction method of the present invention, a dew prevention material is placed on the outer periphery of the pile body in advance, and this earthquake prevention pile is buried in a pile hole in the ground. It has the advantage of being easy to construct.
第１図へ〜（Ｅ）は本願発明の内、第１の工法を示す工
程図、第２図はこの工法に用いる防露材の一部拡大断面
図、第３図へ、Ｂ）は第２の工法を示す工程図である。Figures 1 to (E) are process diagrams showing the first construction method of the present invention, Figure 2 is a partially enlarged sectional view of the dew protection material used in this construction method, Figure 3 is B) It is a process diagram showing construction method 2.
Claims (1)
外周部へ防震材を挿入設置する防震杭工法 ３ 杭本体の外周に予め防震材を配設し、この防震杭を
地中の杭穴に埋設する防震杭工法[Scope of Claims] 1 Earthquake-proofing pile with earthquake-proofing material arranged around the outer periphery of the underground pile 2 After constructing the pile underground, the outer periphery of the pile is excavated, and the earthquake-proofing material is inserted and installed into this outer periphery. Earthquake prevention pile construction method 3 Earthquake prevention pile construction method in which earthquake prevention material is placed around the outer periphery of the pile body in advance, and this earthquake prevention pile is buried in a pile hole in the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2531988A JPH01203515A (en) | 1988-02-05 | 1988-02-05 | Earthquake-proof pile and its construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2531988A JPH01203515A (en) | 1988-02-05 | 1988-02-05 | Earthquake-proof pile and its construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01203515A true JPH01203515A (en) | 1989-08-16 |
Family
ID=12162665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2531988A Pending JPH01203515A (en) | 1988-02-05 | 1988-02-05 | Earthquake-proof pile and its construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01203515A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268609A (en) * | 2017-06-06 | 2017-10-20 | 哈尔滨工业大学深圳研究生院 | A kind of double-decker damping stake and its construction method |
| JP2018135683A (en) * | 2017-02-21 | 2018-08-30 | 株式会社三誠 | Ground improvement device and ground improvement method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636996U (en) * | 1979-08-31 | 1981-04-08 | ||
| JPS61176717A (en) * | 1985-01-30 | 1986-08-08 | Shimizu Constr Co Ltd | Earthquake-proof pile |
-
1988
- 1988-02-05 JP JP2531988A patent/JPH01203515A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636996U (en) * | 1979-08-31 | 1981-04-08 | ||
| JPS61176717A (en) * | 1985-01-30 | 1986-08-08 | Shimizu Constr Co Ltd | Earthquake-proof pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018135683A (en) * | 2017-02-21 | 2018-08-30 | 株式会社三誠 | Ground improvement device and ground improvement method |
| CN107268609A (en) * | 2017-06-06 | 2017-10-20 | 哈尔滨工业大学深圳研究生院 | A kind of double-decker damping stake and its construction method |
| CN107268609B (en) * | 2017-06-06 | 2019-08-09 | 哈尔滨工业大学深圳研究生院 | A kind of double-layer structure damping stake and its construction method |
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