JPH11217829A - Construction of footing pile, footing pile, and precast hollow pile - Google Patents
Construction of footing pile, footing pile, and precast hollow pileInfo
- Publication number
- JPH11217829A JPH11217829A JP2080898A JP2080898A JPH11217829A JP H11217829 A JPH11217829 A JP H11217829A JP 2080898 A JP2080898 A JP 2080898A JP 2080898 A JP2080898 A JP 2080898A JP H11217829 A JPH11217829 A JP H11217829A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- concrete
- hollow
- ready
- pile hole
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims description 8
- 239000004567 concrete Substances 0.000 claims abstract description 54
- 238000003756 stirring Methods 0.000 claims abstract description 33
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000008267 milk Substances 0.000 claims abstract description 17
- 210000004080 milk Anatomy 0.000 claims abstract description 17
- 235000013336 milk Nutrition 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 239000010802 sludge Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、建造物の基礎を
構成する基礎杭、この基礎杭の構築方法、この構築方法
に使用する既製中空杭に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation pile constituting a foundation of a building, a method for constructing the foundation pile, and a ready-made hollow pile used for the construction method.
【０００２】[0002]
【従来の技術】従来、基礎杭は現場で、杭穴を掘削し、
杭穴内に鉄筋篭を沈設すると共に杭穴内にコンクリート
を充填するいわゆる場所打ち杭工法が取られていた。2. Description of the Related Art Conventionally, a foundation pile is excavated at a site,
The so-called cast-in-place pile method has been adopted in which a steel cage is laid in a pile hole and concrete is filled in the pile hole.
【０００３】[0003]
【発明が解決しようとする課題】前記場所打ち杭工法で
は、構築現場での杭穴の掘削・鉄筋篭の埋設作業等の現
場作業が大となり、また打設するコンクリートの品質管
理等が煩雑となる問題点があった。In the cast-in-place pile method, site work such as excavation of a pile hole and burial of a steel cage at a construction site becomes large, and quality control of concrete to be cast becomes complicated. There was a problem.
【０００４】そこで、鉄筋コンクリート製その他の既製
杭を使用した各種工法も提案されているが、杭穴との既
製杭との一体性が保てず、耐力は埋設する既製杭の外径
分しか考慮されず、杭穴の穴径に応じた大きな耐力が期
待できない問題点があった。Therefore, various construction methods using reinforced concrete or other ready-made piles have been proposed, but the integration of the pile hole with the ready-made pile cannot be maintained, and the proof strength is considered only for the outer diameter of the ready-made pile to be buried. However, there was a problem that large proof stress could not be expected according to the hole diameter of the pile hole.
【０００５】[0005]
【課題を解決するための手段】然るにこの発明は、鉄筋
篭を一体に連設した既製中空杭を、杭穴内のコンクリー
トに埋設して、基礎杭を構成するので、前記問題点を解
決した。However, the present invention has solved the above-mentioned problem, since a prefabricated hollow pile integrally formed with reinforcing steel cages is buried in concrete in a pile hole to form a foundation pile.
【０００６】即ちこの発明は、所定杭穴を掘削した後、
該杭穴内に、下端に鉄筋篭を連設した既製中空杭を沈設
すると共に、前記杭穴内及び既製中空杭の中空部内にコ
ンクリートを注入することを特徴とした基礎杭の構築方
法である。また、掘削ロッドで拡底球根部を有する杭穴
を掘削した後、該掘削ロッドを引き上げ、続いて中空部
に撹拌ロッドを入れた既製杭を、前記杭穴内に下降し、
前記既製杭の下方に突出させた前記撹拌ヘッドから前記
球根部内にセメントミルクを注入して球根部内を撹拌
し、前記既製中空杭を所定位置に沈設し、杭穴の底から
地上まで前記撹拌ロッドの吐出口からコンクリートを吐
出しながら、前記既製中空杭の中空部を通って前記撹拌
ロッドを引き上げ、前記セメントミルクをコンクリート
と置換して杭穴内にコンクリートを充填することを特徴
とした基礎杭の構築方法である。That is, according to the present invention, after excavating a predetermined pile hole,
A method for constructing a foundation pile, characterized in that a prefabricated hollow pile having a reinforcing bar connected to a lower end thereof is sunk in the pile hole, and concrete is poured into the pile hole and the hollow portion of the prefabricated hollow pile. In addition, after drilling a pile hole having a bottomed bulb portion with a drill rod, the drill rod is pulled up, and then a ready-made pile containing a stirring rod in a hollow portion is lowered into the pile hole,
Cement milk is injected into the bulb portion from the stirring head protruding below the ready-made pile to stir the inside of the bulb portion, the ready-made hollow pile is settled at a predetermined position, and the stirring rod is set from the bottom of the pile hole to the ground. While discharging concrete from the discharge port of the foundation pile, the stirring rod is pulled up through the hollow portion of the ready-made hollow pile, and the cement milk is replaced with concrete to fill the pile hole with concrete. It is a construction method.
【０００７】また、拡底球根部を有する杭穴内に、下端
部に鉄筋篭を連設した既製中空杭を沈設し、杭穴の拡底
球根部及び既製中空杭の中空部にコンクリートを充填し
たことを特徴とする基礎杭である。[0007] Further, a prefabricated hollow pile having a reinforcing bar connected at the lower end thereof is sunk in a pile hole having a bottomed bulb portion, and concrete is filled in the bottomed bulb portion of the pile hole and the hollow portion of the prefabricated hollow pile. It is a featured foundation pile.
【０００８】また、中空部を有する既製杭の下端に鉄筋
篭を一体に連設したことを特徴とする既製中空杭であ
る。更に、前記において、既製杭の軸鉄筋を下方に突出
させて突出部を構成し、該突出部に、らせん鉄筋を連設
して鉄筋篭構成した既製中空杭である。[0008] Further, there is provided a prefabricated hollow pile in which a reinforcing bar is integrally connected to a lower end of a prefabricated pile having a hollow portion. Further, in the above, there is provided a prefabricated hollow pile in which a shaft reinforcing bar of a prefabricated pile is projected downward to form a projecting portion, and a spiral reinforcing bar is connected to the projecting portion to form a reinforcing bar cage.
【０００９】前記において、既製中空杭は、中掘工法に
使用される各種コンクリート杭（鉄筋コンクリート杭、
ＰＣ杭等）が望ましいが、中空部を有すれば、鋼管杭、
あるいは鋼管とコンクリートとの複合杭などを使用する
こともできる。In the above, the ready-made hollow pile is made of various concrete piles (reinforced concrete pile,
PC pile, etc.) is desirable, but if there is a hollow part, steel pipe pile,
Alternatively, a composite pile of steel pipe and concrete can be used.
【００１０】[0010]
【発明の実施の形態】中空部を有する既製コンクリート
杭の軸鉄筋を下方に突出させて突出部を構成し、該突出
部に、らせん鉄筋を連設して一体の鉄筋篭構成して、既
製中空杭とする。BEST MODE FOR CARRYING OUT THE INVENTION A shaft of a ready-made concrete pile having a hollow portion is projected downward to form a projecting portion, and a spiral reinforcing bar is connected to the projecting portion to form an integral reinforcing bar cage. Hollow pile.
【００１１】掘削ロッドで拡底球根部を有する杭穴を掘
削した後、掘削ロッドを引き上げる。続いて、中空部に
撹拌ロッドを入れた既製中空杭を、杭穴内に下降して杭
の先端を拡底球根部付近に位置させ、ここで既製中空杭
を保持する。既製杭の下方に撹拌ロッドの撹拌ヘッドを
突出させて、拡底球根部内にセメントミルクを注入して
球根部内を撹拌し、既製中空杭を所定位置に沈設する。
杭穴の底から地上まで撹拌ロッドの撹拌ヘッドの吐出口
からコンクリートを吐出しながら、既製中空杭の中空部
を通って撹拌ロッドを引き上げる。セメントミルクがコ
ンクリートに置換され、杭穴内にコンクリートが充填さ
れる。コンクリート固化後に既製中空杭が杭穴内のコン
クリートと一体の基礎杭を構築する。After excavating the pile hole having the expanded bulb portion with the excavation rod, the excavation rod is pulled up. Subsequently, the ready-made hollow pile in which the stirring rod is placed in the hollow part is lowered into the pile hole, and the tip of the pile is positioned near the expanded bulb part, where the ready-made hollow pile is held. The stirring head of the stirring rod is projected below the ready-made pile, cement milk is injected into the expanded bottom bulb part, and the inside of the bulb part is stirred, and the ready-made hollow pile is settled in a predetermined position.
While discharging concrete from the outlet of the stirring head of the stirring rod from the bottom of the pile hole to the ground, the stirring rod is pulled up through the hollow portion of the ready-made hollow pile. The cement milk is replaced by concrete, and concrete is filled in the pile holes. After the concrete is solidified, the ready-made hollow pile will build a foundation pile integrated with the concrete in the pile hole.
【００１２】[0012]
【作用】既製中空杭の下端部に鉄筋篭を形成したので、
既製中空杭の下端部は、杭穴の下端部で充填されたコン
クリートと一体となる。また、杭穴軸部では既製中空杭
の中空部内にコンクリートが充填される。従って、杭穴
内のコンクリートと中空既製杭とで、杭穴の穴径に応じ
た現場造成杭と同等の強度を有する現場造成杭を構築で
きる。[Function] Since a reinforced cage is formed at the lower end of the ready-made hollow pile,
The lower end of the ready-made hollow pile is integrated with the concrete filled at the lower end of the pile hole. In the shaft portion of the pile hole, concrete is filled in the hollow portion of the ready-made hollow pile. Therefore, the on-site formation pile having the same strength as the on-site formation pile corresponding to the hole diameter of the pile hole can be constructed by the concrete in the pile hole and the hollow precast pile.
【００１３】[0013]
【実施例１】図２、３に基づきこの発明の既製中空杭の
構成について説明する。Embodiment 1 The configuration of a ready-made hollow pile of the present invention will be described with reference to FIGS.
【００１４】既製コンクリート杭本体１の軸鉄筋２、２
を下方に突出させて、該軸鉄筋２、２の突出部３、３を
螺旋鉄筋４で連結して、この発明の既製中空杭６を構成
する。The shaft reinforcing bars 2, 2 of the ready-made concrete pile main body 1
Are projected downward, and the protruding portions 3, 3 of the shaft reinforcing bars 2, 2 are connected by the spiral reinforcing bar 4, thereby forming the ready-made hollow pile 6 of the present invention.
【００１５】前記において、軸鉄筋２、２の突出部３、
３と螺旋鉄筋４とで、鉄筋篭５とする。また前記既製中
空杭６で、既製コンクリート杭本体１の下端１ａから鉄
筋篭５の下端５ａまでの距離Ｌは、地盤条件、杭が負担
すべき荷重にもよるが、既製中空杭６の外径をＤとする
と、通常は１Ｄ〜１ｍ程度であり、既製コンクリート杭
本体１の下端１ａが、鉄筋篭５の下端５ａが掘削した杭
穴２０の底２３に位置した際に、掘削した杭穴２０の拡
底球根部２２内に位置するような高さとしてある。In the above, the protruding portions 3 of the shaft reinforcing bars 2, 2
3 and the spiral rebar 4 constitute a rebar basket 5. The distance L from the lower end 1a of the ready-made concrete pile main body 1 to the lower end 5a of the reinforced cage 5 depends on the ground conditions and the load to be borne by the pile. Is D, it is usually about 1D to 1 m. When the lower end 1a of the ready-made concrete pile main body 1 is located at the bottom 23 of the pile hole 20 from which the lower end 5a of the reinforcing bar 5 is excavated, the excavated pile hole 20 is formed. The height is set so as to be located within the expanded bulb portion 22 of FIG.
【００１６】前記実施例において、鉄筋篭５の下端５ａ
に、鉄筋篭５を保護する短鋼管８を溶着することもでき
る（図３（ａ））。また、短鋼管８に変えて、円板状の
リングとすることもできる（図示していない）。In the above embodiment, the lower end 5a of the reinforcing bar 5
Then, a short steel pipe 8 for protecting the reinforcing bar 5 can be welded (FIG. 3A). Further, instead of the short steel pipe 8, a disk-shaped ring may be used (not shown).
【００１７】また、前記実施例において、既製コンクリ
ート杭本体１の軸鉄筋３を下方に突出させて鉄筋篭５を
構成したが、鉄筋篭５と既製コンクリート杭本体１とを
別部材で構成することもできる。即ち、端板１０の下面
に、軸鉄筋１１、１１を突設させると共に、該軸鉄筋１
１、１１の周囲に螺旋鉄筋４を周設して鉄筋篭１２を構
成する（図３（ｂ））。鉄筋篭１２の端板１０を既製コ
ンクリート杭本体１の下端板９に連結して、既製中空杭
６を構成する。この場合には、一般の既製コンクリート
杭１の下端板１０に鉄筋篭１２を取付ければ、本発明の
既製中空杭を構成することもできる。In the above embodiment, the reinforcing bar 5 is formed by projecting the shaft reinforcing bar 3 of the ready-made concrete pile body 1 downward, but the reinforcing bar 5 and the ready-made concrete pile body 1 are formed by different members. Can also. That is, the shaft rebars 11, 11 are projected from the lower surface of the end plate 10, and
A spiral reinforcing bar 4 is provided around 1 and 11 to form a reinforcing bar cage 12 (FIG. 3B). The end plate 10 of the reinforced cage 12 is connected to the lower end plate 9 of the ready-made concrete pile main body 1 to constitute the ready-made hollow pile 6. In this case, if the reinforced cage 12 is attached to the lower end plate 10 of the general ready-made concrete pile 1, the ready-made hollow pile of the present invention can be constituted.
【００１８】また、前記実施例において、既製コンクリ
ート杭本体１をストレート杭としたが、下端部あるいは
全長に亘って環状リブ１３、１３を設けた節杭とするこ
ともできる（図３（ｃ））。Further, in the above embodiment, the precast concrete pile main body 1 is a straight pile, but it may be a knotted pile provided with annular ribs 13 at the lower end or over the entire length (FIG. 3 (c)). ).
【００１９】[0019]
【実施例２】図１に基づきこの発明の基礎杭及びその構
築方法の実施例を説明する。Embodiment 2 An embodiment of a foundation pile and a method of constructing the same according to the present invention will be described with reference to FIG.
【００２０】 下端部に掘削ヘッド１６を有する掘削
ロッド１５を正転させて、杭穴２０の軸部２１を掘削す
る（図１（ａ））。前記掘削ヘッド１６は、下端部に掘
削刃を有するヘッド本体１７に揺動自在で、下端部に掘
削刃を有する揺動腕１８、１８を取付けて構成してあ
る。また、掘削ロッド１５には、掘削土を地上に揚げる
搬送手段（螺旋はね、スクリュー等）や、杭穴壁を整え
て倒壊を防止する為に掘削泥土を練り付けるドラム類を
取付けてある（図示していない）。The excavation rod 15 having the excavation head 16 at the lower end is rotated forward to excavate the shaft portion 21 of the pile hole 20 (FIG. 1A). The excavating head 16 is configured so as to be swingable on a head body 17 having an excavating blade at a lower end, and to be attached with swinging arms 18, 18 having an excavating blade at a lower end. Further, the excavating rod 15 is provided with a transporting means (spiral spring, screw, etc.) for lifting excavated soil to the ground, and drums for kneading excavated mud to prepare a pile hole wall and prevent collapse ( Not shown).
【００２１】 続いて、掘削ロッド１５を反転させ
て、逆に振れた揺動腕１８、１８で杭穴２０の拡底球根
部２２を掘削する（図１（ｂ））。杭穴２０の掘削が完
了したならば、前記掘削ロッド１５を、杭周固定液（セ
メントミルク等）を杭穴２２内に吐出しながら、地上に
引き上げる。Subsequently, the excavating rod 15 is inverted, and the expanded bulb portion 22 of the pile hole 20 is excavated by the swinging arms 18, 18 which have been swung in reverse (FIG. 1B). When the excavation of the pile hole 20 is completed, the excavation rod 15 is pulled up to the ground while discharging the pile circumference fixing liquid (cement milk or the like) into the pile hole 22.
【００２２】 次に、既製中空杭６の中空部７内に撹
拌ロッド２４を収納して、杭穴２０内に、該既製中空杭
６及び撹拌ロッド２４を下降させる。前記撹拌ロッド２
４はその下端部に、揺動する撹拌腕２６、２６を有する
と共に、コンクリートの吐出口２７を有する撹拌ヘッド
２５を取付けてある。また、撹拌ロッド２４は吐出口２
７に対応した搬送用のパイプを内蔵するが、コンクリー
ト用とセメントミルク用の共用のパイプを設け、あるい
は夫々専用のパイプを別途設けることもできる。Next, the stirring rod 24 is housed in the hollow portion 7 of the prefabricated hollow pile 6, and the prefabricated hollow pile 6 and the stirring rod 24 are lowered into the pile hole 20. The stirring rod 2
4 has a stirring head 25 having swinging stirring arms 26 and 26 at the lower end thereof and a discharge port 27 of concrete. The stirring rod 24 is connected to the discharge port 2
Although a transport pipe corresponding to No. 7 is built in, a common pipe for concrete and cement milk can be provided, or a dedicated pipe can be separately provided for each.
【００２３】 既製中空杭６の下端（鉄筋篭の下端）
５ａが杭穴２０の拡底球根部２２の上部に位置した状態
で、既製中空杭６の下降を停止してこの位置に保持す
る。既製中空杭６から撹拌ロッド２４の撹拌ヘッド２５
を下方に突出させ、杭穴２０の拡底球根部２２内を撹拌
するとともに拡底球根部２２内にセメントミルクを注入
する（図１（ｃ））。ここで、拡底球根部２２内の泥土
はセメントミルクに置換される。Lower end of ready-made hollow pile 6 (lower end of reinforced cage)
With 5a positioned above the expanded bulb portion 22 of the pile hole 20, the descent of the prefabricated hollow pile 6 is stopped and held at this position. From the ready-made hollow pile 6 to the stirring head 25 of the stirring rod 24
Is projected downward, and the inside of the expanded bulb portion 22 of the pile hole 20 is agitated and the cement milk is injected into the expanded bulb portion 22 (FIG. 1 (c)). Here, the mud in the expanded bulb portion 22 is replaced with cement milk.
【００２４】 次に、既製中空杭６を杭穴２０の底２
３に沈設した後に、撹拌ヘッド２５の吐出口２７からコ
ンクリート２８を吐出しながら、撹拌ロッド２４を既製
中空杭６の中空部７を通って、地面２９上に引き上げる
（図１（ｄ））。コンクリート２８の注入により、拡底
球根部２２内のセメントミルクは、コンクリート２８に
置換される。Next, the ready-made hollow pile 6 is inserted into the bottom 2 of the pile hole 20.
3, the stirring rod 24 is pulled up onto the ground 29 through the hollow portion 7 of the pre-made hollow pile 6 while discharging the concrete 28 from the discharge port 27 of the stirring head 25 (FIG. 1 (d)). By injecting the concrete 28, the cement milk in the expanded bulb portion 22 is replaced with the concrete 28.
【００２５】 コンクリート２８が固化した後に、杭
穴２０の拡底球根部２２内、既製中空杭６の中空部７内
にコンクリート２８が充填され、杭穴２０の軸部２１と
既製中空杭６の外周との間には杭周固定液３０が充填さ
れた基礎杭３１が構築される（図１（ｅ））。After the concrete 28 is solidified, the concrete 28 is filled into the expanded bulb portion 22 of the pile hole 20 and the hollow portion 7 of the ready-made hollow pile 6, and the shaft 21 of the pile hole 20 and the outer periphery of the ready-made hollow pile 6 are filled. In between, a foundation pile 31 filled with the pile periphery fixing liquid 30 is constructed (FIG. 1 (e)).
【００２６】前記実施例において、既製中空杭６は、前
記実施例１の各種既製中空杭（図３他）を使用すること
もできる（図示していない）。In the above embodiment, the prefabricated hollow pile 6 may use the various prefabricated hollow piles of the first embodiment (FIG. 3 and others) (not shown).
【００２７】また、前記実施例において、既製中空杭６
を杭穴２０の底２３に沈設した後に、撹拌ヘッド２５か
らコンクリート２８を吐出したが、撹拌ヘッド２５から
コンクリートを突出しながら既製中空杭６の中空部７内
に通って撹拌ヘッド２５を引き上げながら、既製中空杭
６を沈設することもできる（図示していない）。Further, in the above embodiment, the hollow stake 6
Was settled at the bottom 23 of the pile hole 20, and then the concrete 28 was discharged from the stirring head 25. While projecting the concrete from the stirring head 25, the concrete 28 was passed through the hollow portion 7 of the ready-made hollow pile 6, and the stirring head 25 was pulled up. Prefabricated hollow piles 6 can also be laid down (not shown).
【００２８】また、前記実施例で、撹拌ロッド２４から
セメントミルクを吐出して、一旦泥土をセメントミルク
に置換した後に更にセメントミルクをコンクリートに置
換したので、コンクリートの質を高めることができる
が、拡底球根部２２の泥土内に撹拌ロッド２４から直接
コンクリートを吐出することもできる。In the above embodiment, the cement milk is discharged from the stirring rod 24, the mud is once replaced with cement milk, and then the cement milk is further replaced with concrete, so that the quality of concrete can be improved. Concrete can be directly discharged from the stirring rod 24 into the mud of the expanded bulb portion 22.
【００２９】[0029]
【発明の効果】この発明は、杭穴内に下端部に鉄筋篭を
有する既製中空杭を沈設すると共に杭穴内にコンクリー
トを充填するので、杭穴内に構造的に一体となったコン
クリート杭を構築できるので、杭穴径に応じた耐力を期
待できる効果がある。According to the present invention, a prefabricated hollow pile having a reinforcing bar at the lower end is laid in the pile hole and concrete is filled in the pile hole, so that a concrete pile integrated structurally in the pile hole can be constructed. Therefore, there is an effect that a proof stress according to a pile hole diameter can be expected.
【００３０】また、杭穴内に既製中空杭を沈設するの
で、鉄筋篭の沈設に比して、沈設作業が容易であり、ま
た構築現場でのコンクリート打設量を大幅に削減できる
ので、基礎杭の構築作業を簡略化・効率化できる効果が
ある。Further, since the ready-made hollow pile is laid in the pile hole, the laying work is easier than in the case of the reinforced cage, and the amount of concrete poured at the construction site can be greatly reduced. Has the effect of simplifying and increasing the efficiency of construction work.
【図１】（ａ）乃至（ｅ）はこの発明の実施例を説明す
る概略した縦断面図である。FIGS. 1A to 1E are schematic longitudinal sectional views for explaining an embodiment of the present invention.
【図２】この発明の実施例の既製中空杭で、（ａ）は縦
断面図、（ｂ）は底面図を夫々表す。FIGS. 2A and 2B are longitudinal sectional views and a bottom view, respectively, of a ready-made hollow pile according to an embodiment of the present invention.
【図３】（ａ）乃至（ｃ）は、この発明の既製中空杭の
他の実施例の縦断面図である。3 (a) to 3 (c) are longitudinal sectional views of another embodiment of the ready-made hollow pile of the present invention.
１ 既製コンクリート杭本体 ２ 軸鉄筋 ３ 軸鉄筋の突出部 ４ 螺旋鉄筋 ５ 鉄筋篭 ５ａ 鉄筋篭の下端 ６ 既製中空杭 ７ 中空部（既製中空杭） ９ 下端板（既製コンクリート杭本体） １０ 端板（鉄筋篭） １１ 軸鉄筋（鉄筋篭） １２ 鉄筋篭 １５ 掘削ロッド １６ 掘削ヘッド ２０ 杭穴 ２１ 杭穴の軸部 ２２ 杭穴の拡底球根部 ２３ 杭穴の底 ２４ 撹拌ロッド ２５ 撹拌ヘッド ２７ 吐出口（撹拌ヘッド） ２８ コンクリート ２９ 地上 ３１ 基礎杭 DESCRIPTION OF SYMBOLS 1 Ready-made concrete pile main body 2 Axis reinforcing bar 3 Projection part of axis reinforcing bar 4 Spiral reinforcing bar 5 Reinforcement cage 5a Lower end of reinforced cage 6 Ready-made hollow pile 7 Hollow part (ready hollow pile) 9 Bottom plate (ready concrete pile body) 10 End plate ( 11 Rebar cage (12) Reinforcement cage (15) Reinforcement cage (15) Reinforcement cage (15) Drilling rod (16) Drilling head (20) Piles 21 Mixing head) 28 Concrete 29 Ground 31 Foundation pile
Claims (5)
端に鉄筋篭を連設した既製中空杭を沈設すると共に、前
記杭穴内及び既製中空杭の中空部内にコンクリートを注
入することを特徴とした基礎杭の構築方法。After excavating a predetermined pile hole, a prefabricated hollow pile having a reinforcing bar connected to a lower end thereof is sunk in the pile hole, and concrete is injected into the pile hole and a hollow portion of the prefabricated hollow pile. Construction method of foundation pile characterized by the following.
掘削した後、該掘削ロッドを引き上げ、続いて中空部に
撹拌ロッドを入れた既製杭を、前記杭穴内に下降し、前
記既製杭の下方に突出させた前記撹拌ヘッドから前記球
根部内にセメントミルクを注入して球根部内を撹拌し、
前記既製中空杭を所定位置に沈設し、杭穴の底から地上
まで前記撹拌ロッドの吐出口からコンクリートを吐出し
ながら、前記既製中空杭の中空部を通って前記撹拌ロッ
ドを引き上げ、前記セメントミルクをコンクリートと置
換して杭穴内にコンクリートを充填することを特徴とし
た基礎杭の構築方法。2. After excavating a pile hole having an expanded bulb portion with a drill rod, the drill rod is pulled up, and then a ready-made pile having a stirring rod inserted in a hollow portion is lowered into the pile hole, and the ready-made pile is removed. Injecting cement milk into the bulb portion from the stirring head protruding downward to agitate the bulb portion,
The ready-made hollow pile is sunk at a predetermined position, and while discharging concrete from the bottom of the pile hole to the ground through the discharge port of the stirring rod, the stirring rod is pulled up through the hollow portion of the ready-made hollow pile, and the cement milk is removed. A method for constructing a foundation pile, characterized in that concrete is filled in a pile hole by replacing concrete with concrete.
鉄筋篭を連設した既製中空杭を沈設し、杭穴の拡底球根
部及び既製中空杭の中空部にコンクリートを充填したこ
とを特徴とする基礎杭。3. A method in which a prefabricated hollow pile having a reinforcing bar connected to a lower end thereof is sunk in a pile hole having a bottomed bulb portion, and concrete is filled in the bottomed bulb portion of the pile hole and the hollow portion of the prefabricated hollow pile. The foundation pile that is the feature.
一体に連設したことを特徴とする既製中空杭。4. A prefabricated hollow pile, wherein a reinforcing bar is integrally connected to a lower end of the prefabricated pile having a hollow portion.
部を構成し、該突出部に、らせん鉄筋を連設して鉄筋篭
構成した請求項４記載の既製中空杭。5. The ready-made hollow pile according to claim 4, wherein a shaft reinforcing bar of the ready-made pile is projected downward to form a projecting portion, and a spiral reinforcing bar is connected to the projecting portion to form a reinforcing bar cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02080898A JP4154487B2 (en) | 1998-02-02 | 1998-02-02 | Foundation pile construction method, foundation pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02080898A JP4154487B2 (en) | 1998-02-02 | 1998-02-02 | Foundation pile construction method, foundation pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11217829A true JPH11217829A (en) | 1999-08-10 |
| JP4154487B2 JP4154487B2 (en) | 2008-09-24 |
Family
ID=12037350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02080898A Expired - Lifetime JP4154487B2 (en) | 1998-02-02 | 1998-02-02 | Foundation pile construction method, foundation pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4154487B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334304C (en) * | 2004-12-06 | 2007-08-29 | 雷玉华 | Construction method for making hollow pile with large end at bottom by casting concrete in situ |
| JP2012067562A (en) * | 2010-09-27 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground excavation method |
| JP2012067561A (en) * | 2010-09-27 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground excavation method |
| CN108266131A (en) * | 2018-03-13 | 2018-07-10 | 刘守进 | Rotate soil compaction bottom expanding drill and method for constructing foundation pile |
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| CN111472692A (en) * | 2020-05-14 | 2020-07-31 | 武汉南方旭域科技工程有限公司 | Construction method pile construction equipment and construction method thereof |
| JP2021050569A (en) * | 2019-09-26 | 2021-04-01 | 株式会社熊谷組 | Reinforcement tool, precast pile, and improved ground |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4424208B2 (en) | 2005-01-17 | 2010-03-03 | トヨタ自動車株式会社 | Body front structure |
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1998
- 1998-02-02 JP JP02080898A patent/JP4154487B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334304C (en) * | 2004-12-06 | 2007-08-29 | 雷玉华 | Construction method for making hollow pile with large end at bottom by casting concrete in situ |
| JP2012067562A (en) * | 2010-09-27 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground excavation method |
| JP2012067561A (en) * | 2010-09-27 | 2012-04-05 | Asahi Kasei Construction Materials Co Ltd | Ground excavation method |
| CN108266131A (en) * | 2018-03-13 | 2018-07-10 | 刘守进 | Rotate soil compaction bottom expanding drill and method for constructing foundation pile |
| CN108547284A (en) * | 2018-04-16 | 2018-09-18 | 中交第二航务工程勘察设计院有限公司 | A kind of bottom-expanding sinking-pipe pilework and construction method |
| CN109184570A (en) * | 2018-11-14 | 2019-01-11 | 淮海工学院 | The construction method of prefabricated pile is sunk in a kind of expansion bit and its rotation reaming |
| JP2021050569A (en) * | 2019-09-26 | 2021-04-01 | 株式会社熊谷組 | Reinforcement tool, precast pile, and improved ground |
| CN111472692A (en) * | 2020-05-14 | 2020-07-31 | 武汉南方旭域科技工程有限公司 | Construction method pile construction equipment and construction method thereof |
| CN116378019A (en) * | 2023-04-28 | 2023-07-04 | 山西四建集团有限公司 | A pile foundation suitable for high groundwater level and large settlement and its construction method |
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| Publication number | Publication date |
|---|---|
| JP4154487B2 (en) | 2008-09-24 |
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