JP4611108B2 - Integrated construction method of pile and column - Google Patents

Integrated construction method of pile and column Download PDF

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JP4611108B2
JP4611108B2 JP2005144898A JP2005144898A JP4611108B2 JP 4611108 B2 JP4611108 B2 JP 4611108B2 JP 2005144898 A JP2005144898 A JP 2005144898A JP 2005144898 A JP2005144898 A JP 2005144898A JP 4611108 B2 JP4611108 B2 JP 4611108B2
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pile
steel pipe
concrete
pipe member
column
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JP2006322179A (en
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理 三輪
規行 福岡
匡善 柴田
康裕 片山
康平 瀬戸
正成 樫木
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Okumura Corp
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本発明は、場所打ちコンクリート杭に鋼管充填コンクリート柱を、作業性良好に一体化することが可能な杭と柱の一体化施工方法に関する。   The present invention relates to an integrated construction method of a pile and a pillar capable of integrating a steel pipe-filled concrete column into a cast-in-place concrete pile with good workability.

従来、柱と杭を接合する構造として、例えば特許文献１が知られている。この特許文献１は、鋼管内にコンクリートを充填してなる充填鋼管コンクリート造の柱と、ＰＣ杭や場所打ちコンクリート杭等の杭との接合構造に関し、杭の杭頭部を最下階のスラブ上まで突出させる一方で、柱の鋼管の下端部を地中に達するように埋め込んで杭の杭頭部に装着して、当該杭頭部を鋼管内に挿入し、杭頭に突出させた杭鉄筋を鋼管内のコンクリートに定着させるようにしていた。当該接合構造では、杭構築時に杭頭から杭鉄筋を突出させ、杭が硬化した後で、杭頭部にその上方から柱の鋼管を吊り込んで当該鋼管内に杭頭部を挿入し、その後、鋼管内へ打設したコンクリートに杭鉄筋を定着させるように施工されると考えられる。
特開２００１−２５４３６５号公報 Conventionally, patent document 1 is known as a structure which joins a pillar and a pile, for example. This patent document 1 relates to a joint structure of a filled steel pipe concrete column filled with concrete in a steel pipe and a pile such as a PC pile or a cast-in-place concrete pile, and the pile head of the pile is placed on the bottom slab. A pile that protrudes to the top, and is embedded in the pile head of the pile so that the lower end of the steel pipe of the pillar reaches the ground, and the pile head is inserted into the steel pipe and protruded to the pile head The rebar was fixed to the concrete in the steel pipe. In this joint structure, the pile rebar protrudes from the pile head during the construction of the pile, and after the pile has hardened, the steel pipe of the column is suspended from above the pile head and the pile head is inserted into the steel pipe. It is thought that it will be constructed so that the pile reinforcement is fixed to the concrete cast in the steel pipe.
JP 2001-254365 A

上記背景技術にあっては、「柱の鋼管の下端部を……杭の杭頭部に装着」するものであることから、杭頭部を含む杭の構築作業が完了した後に、柱の鋼管を装着するものであり、従ってまず杭を硬化させ、次いで、構築が完了した杭の周りの地盤を一旦掘削し、その後柱の鋼管を杭頭部に装着して固定し、さらに鋼管の周りを埋め戻しして当該鋼管を地中に埋め込む、という一連の作業が必要であり、杭と柱の接合がきわめて煩雑で手間や時間がかかるという課題があった。   In the background art described above, since the lower end of the steel pipe of the column is attached to the pile head of the pile, after the construction work of the pile including the pile head is completed, the steel pipe of the column Therefore, the pile is first hardened, then the ground around the pile that has been constructed is excavated once, and then the steel pipe of the column is attached and fixed to the pile head, and further around the steel pipe A series of operations of backfilling and embedding the steel pipe into the ground is necessary, and there is a problem that joining of the pile and the column is extremely complicated and takes time and effort.

本発明は上記従来の課題に鑑みて創案されたものであって、場所打ちコンクリート杭に鋼管充填コンクリート柱を、作業性良好に一体化することが可能な杭と柱の一体化施工方法を提供することを目的とする。   The present invention was devised in view of the above-mentioned conventional problems, and provides an integrated construction method of a pile and a pillar capable of integrating a steel pipe-filled concrete column into a cast-in-place concrete pile with good workability. The purpose is to do.

本発明にかかる杭と柱の一体化施工方法は、鉄筋や鉄骨などの強度部材を内部に有する場所打ちコンクリート杭に鋼管充填コンクリート柱を一体化する方法であって、上記場所打ちコンクリート杭を形成する際、杭コンクリート打設前に予め、杭頭部を取り囲んで地中から地盤面に達する鋼管部材を配置する第１工程と、杭コンクリートを打設した後、上記場所打ちコンクリート杭の杭頭部位置の杭頭部強度部材を露出させるとともに、上記鋼管部材の下部が該杭頭部強度部材を包囲しつつ地中に残存するように、当該鋼管部材を地盤面上方へ引き上げる第２工程と、引き上げられて地盤面上方に露出された上記鋼管部材の露出部分を上記鋼管充填コンクリート柱の下部とするために、該鋼管部材内に、柱コンクリートを打設して上記杭頭部強度部材を埋設する第３工程とからなることを特徴とする。   An integrated construction method of a pile and a column according to the present invention is a method of integrating a steel pipe-filled concrete column into a cast-in-place concrete pile having strength members such as reinforcing bars and steel frames inside, and forming the cast-in-place concrete pile When placing the pile concrete, first place the steel pipe member that surrounds the pile head and reaches the ground surface from the ground before placing the pile concrete, and after placing the pile concrete, the pile head of the cast-in-place concrete pile A second step of exposing the pile head strength member at the position and pulling the steel pipe member upward above the ground surface so that the lower portion of the steel pipe member remains in the ground while surrounding the pile head strength member. In order to use the exposed portion of the steel pipe member that is pulled up and exposed above the ground surface as the lower part of the steel pipe-filled concrete column, the pile head is formed by placing column concrete in the steel pipe member. Characterized by comprising the third step of embedding the degree member.

前記第２工程の露出作業は、前記杭頭部の杭コンクリートを吸引除去することにより実行されることを特徴とする。   The exposure operation in the second step is performed by sucking and removing pile concrete of the pile head.

前記第２工程の引き上げ作業は、杭コンクリートの未硬化状態で実行されることを特徴とする。   The pulling-up operation in the second step is performed in an uncured state of pile concrete.

本発明にかかる杭と柱の一体化施工方法にあっては、場所打ちコンクリート杭に鋼管充填コンクリート柱を、作業性良好に一体化することができる。   In the integrated construction method of a pile and a column according to the present invention, a steel pipe-filled concrete column can be integrated with a cast-in-place concrete pile with good workability.

以下に、本発明にかかる杭と柱の一体化施工方法の好適な一実施形態を、添付図面を参照して詳細に説明する。本実施形態にかかる杭と柱の一体化施工方法は基本的には、図１に示す手順で実施される。まず、場所打ちコンクリート杭１を構築する。構築に際しては、杭コンクリート２打設前に予め、杭頭部３を取り囲んで地中から地盤面Ｇに達する鋼管部材４を配設する。具体的には、杭孔５を形成する前に、杭１を構築する箇所に、地盤面Ｇから地中へ向かって中空筒体状の鋼管部材４を打設する。鋼管部材４は平面断面が円形であっても、それ以外の多角形状であっても良い。   EMBODIMENT OF THE INVENTION Below, suitable one Embodiment of the integrated construction method of the pile and pillar concerning this invention is described in detail with reference to an accompanying drawing. The integrated construction method of a pile and a pillar according to the present embodiment is basically performed according to the procedure shown in FIG. First, the cast-in-place concrete pile 1 is constructed. At the time of construction, a steel pipe member 4 that surrounds the pile head 3 and reaches the ground surface G from the ground is disposed in advance before the pile concrete 2 is placed. Specifically, before the pile hole 5 is formed, a hollow tubular steel pipe member 4 is driven from the ground surface G into the ground at a place where the pile 1 is constructed. The steel pipe member 4 may have a circular planar cross section or a polygonal shape other than that.

鋼管部材４は、後述する引き上げ作業によって、一部が地中に埋設された状態で、地盤面Ｇ上方に露出される部分が鋼管充填コンクリート柱６の下部を形成できる長さ寸法で形成される。またこの鋼管部材４は、現場打ちコンクリート杭１を構築したときに、杭頭部３の周りを当該鋼管部材４で取り囲むことができる打設深さで地中に打ち込まれる。「地盤面Ｇに達する」とは、鋼管部材４で杭頭部３を取り囲み得るとともに、後述する引き上げ作業に際し鋼管部材４に対して必要な取り合いが可能であるように、鋼管部材４の上端部が地盤面Ｇから僅かに突出するだけでもよく、従ってそれ以上突出させても良い。そしてこの鋼管部材４は、その上端部が少なくとも杭頭部３位置よりも僅かに高い位置にセットされて、杭１の構築時に各種作業に利用されるスタンドパイプとして兼用される。   The steel pipe member 4 is formed in such a length dimension that a portion exposed above the ground surface G can form a lower portion of the steel pipe-filled concrete column 6 in a state where a part thereof is buried in the ground by a pulling operation described later. . The steel pipe member 4 is driven into the ground at a placement depth that can surround the pile head 3 with the steel pipe member 4 when the on-site concrete pile 1 is constructed. “To reach the ground surface G” means that the steel pipe member 4 can surround the pile head 3 and the upper end portion of the steel pipe member 4 so that necessary engagement with the steel pipe member 4 can be performed during the pulling operation described later. May protrude slightly from the ground surface G, and therefore may protrude further. The steel pipe member 4 has an upper end set at a position slightly higher than at least the pile head 3 position, and is also used as a stand pipe used for various operations when the pile 1 is constructed.

鋼管部材４を打設したならば、一般周知の方法によって鋼管部材４内方に現場打ちコンクリート杭１を構築する。略述すると、まず、杭孔５を形成する。この際、例えば掘削土砂を泥水とともに吸い上げて排出しつつ、掘削を進めていく。次いで、杭孔５内に鉄筋籠や鉄骨部材などの強度部材を挿入する。その後、トレミー管７で杭コンクリート２を、予め設定した杭頭部３位置まで打設する。これにより、地中から地盤面Ｇに達する鋼管部材４を配置した状態で、鉄骨部材や鉄筋籠などの強度部材を内部に有する現場打ちコンクリート杭１が形成される（図１（ａ）参照）。   When the steel pipe member 4 is placed, the in-situ concrete pile 1 is constructed inside the steel pipe member 4 by a generally known method. Briefly, first, the pile hole 5 is formed. At this time, for example, excavation is carried out while sucking up and discharging excavated earth and sand together with muddy water. Next, a strength member such as a reinforcing bar rod or a steel frame member is inserted into the pile hole 5. Thereafter, the pile concrete 2 is driven to the preset pile head 3 position with the tremy pipe 7. Thereby, in-situ concrete pile 1 which has strength members, such as a steel frame member and a reinforcing bar, in the state where steel pipe member 4 which reaches ground surface G from the ground is arranged is formed (refer to Drawing 1 (a)). .

次いで、杭コンクリートを打設した後、杭コンクリート２が未硬化の状態で、杭頭部３位置の強度部材を露出させる。図示例にあっては、鉄筋コンクリート杭が示されていて、杭頭部３位置の鉄筋８が露出される。露出作業はいわゆる杭頭処理に相当し、吸引ホース９で、杭頭部３の不良なコンクリート部分を除去することによって行われる。未硬化状態であるので、吸引ホース９などの吸引作用で容易かつ迅速に杭頭部３の不良コンクリート部分を除去して鉄筋８を杭頭部３から上方へ露出させることができる。露出作業は、吸引によるほか、適宜な方法を採用することができる（図１（ｂ）参照）。   Next, after placing the pile concrete, the strength member at the position of the pile head 3 is exposed with the pile concrete 2 in an uncured state. In the example of illustration, the reinforced concrete pile is shown and the reinforcing bar 8 of the pile head 3 position is exposed. The exposure operation corresponds to a so-called pile head treatment, and is performed by removing a defective concrete portion of the pile head 3 with the suction hose 9. Since it is in an uncured state, the defective concrete portion of the pile head 3 can be easily and quickly removed by the suction action of the suction hose 9 and the like, and the reinforcing bars 8 can be exposed upward from the pile head 3. For the exposure work, an appropriate method can be adopted in addition to suction (see FIG. 1B).

その後、鋼管部材４の下部が杭頭部３から露出された鉄筋８を包囲した状態で地中に残存するように、鋼管部材４をクレーンなどで地盤面Ｇ上方へ引き上げる。この引き上げ作業は杭コンクリート２の未硬化状態で実施され、従って比較的小さな揚重能力で速やかに鋼管部材４を引き上げることができる。地中への鋼管部材４の残存量は、後述する柱コンクリート１０で埋設される杭頭部３の鉄筋８の作用も相俟って、杭１と柱６との相互間で必要な応力伝達を確保できる程度でよい。従ってまた、鋼管部材４の地盤面Ｇ上への露出量は、当該露出部分が鋼管充填コンクリート柱６に要求されるコンファインド効果を確保できる程度でよい。   Then, the steel pipe member 4 is pulled up above the ground surface G with a crane or the like so that the lower part of the steel pipe member 4 remains in the ground while surrounding the reinforcing bar 8 exposed from the pile head 3. This pulling operation is performed in an uncured state of the pile concrete 2, and therefore the steel pipe member 4 can be quickly pulled up with a relatively small lifting capacity. The remaining amount of the steel pipe member 4 in the ground is the necessary stress transmission between the pile 1 and the column 6 together with the action of the reinforcing bar 8 of the pile head 3 embedded in the column concrete 10 described later. It is sufficient to ensure the above. Therefore, the exposure amount of the steel pipe member 4 on the ground surface G may be such that the exposed portion can ensure the confining effect required for the steel pipe-filled concrete column 6.

鋼管部材４には予め、地中と接する外周面や杭コンクリート２と接する内周面に、剥離性もしくは潤滑性を発揮するコーティングを形成しておくようにしても良い。このようにすれば、比較的長大な鋼管部材４であっても、円滑・迅速に引き上げ作業を行うことができる（図１（ｃ）参照）。図示しないけれども、引き上げた鋼管部材４が沈下しないように、仮受材などの支持部材で当該鋼管部材４を支持することが好ましい。   The steel pipe member 4 may be previously formed with a coating that exhibits peelability or lubricity on the outer peripheral surface in contact with the ground or the inner peripheral surface in contact with the pile concrete 2. In this way, even a relatively long steel pipe member 4 can be pulled up smoothly and quickly (see FIG. 1C). Although not shown, it is preferable to support the steel pipe member 4 with a support member such as a provisional member so that the pulled steel pipe member 4 does not sink.

ところで、この杭頭部３の鉄筋８の露出作業と鋼管部材４の引き上げ作業は、先に鋼管部材４の引き上げを行い、その後に杭頭部３位置の鉄筋８を露出させるように、順序を逆にして施工してもよいことはもちろんである。しかしながら、露出作業の利便性からすれば、引き上げ作業前に露出作業を行うことが好ましい。   By the way, the exposure operation of the reinforcing bar 8 of the pile head 3 and the lifting operation of the steel pipe member 4 are performed in order so that the steel pipe member 4 is first lifted and then the reinforcing bar 8 at the pile head 3 position is exposed. Of course, the construction may be reversed. However, in view of the convenience of the exposure work, it is preferable to perform the exposure work before the lifting work.

その後、引き上げられて地盤面Ｇ上方に露出された鋼管部材４の露出部分を鋼管充填コンクリート柱６の下部とするために、鋼管部材４内に上方から柱コンクリート１０を打設し、この柱コンクリート１０で杭頭部３に露出している鉄筋８を埋設する。このように柱コンクリート１０で杭頭部３の鉄筋８を埋設することにより、地中から地盤面Ｇ上方に露出された鋼管部材４を構造強度的に複合させた形態で、柱コンクリート１０が充填されて構築される鋼管充填コンクリート柱６と、現場打ちコンクリート杭１とを一体化することができる（図１（ｄ）参照）。図示例にあっては、現場打ちコンクリート杭１として鉄筋コンクリート杭を例示して説明したが、鉄骨コンクリート杭であっても、また鉄骨・鉄筋コンクリート杭であっても、同様に施工することができる。   Thereafter, in order to set the exposed portion of the steel pipe member 4 pulled up and exposed above the ground surface G as the lower part of the steel pipe-filled concrete column 6, a column concrete 10 is placed in the steel pipe member 4 from above, and this column concrete is provided. 10 embeds the reinforcing bar 8 exposed in the pile head 3. By burying the reinforcing bars 8 of the pile head 3 with the column concrete 10 in this way, the column concrete 10 is filled in a form in which the steel pipe member 4 exposed from the ground to the ground surface G is combined in terms of structural strength. Thus, the steel pipe-filled concrete pillar 6 constructed and the cast-in-place concrete pile 1 can be integrated (see FIG. 1D). In the illustrated example, a reinforced concrete pile is exemplified as the in-situ concrete pile 1, but even a steel concrete pile or a steel / reinforced concrete pile can be similarly constructed.

このような杭と柱の一体化施工方法は、フーチングを備えない形態の一般的な建物の構築に好適であることはもちろんのこと、橋梁の脚部を構築する際にも、好ましく適用することができる。図２には、上記実施形態にかかる杭と柱の一体化施工方法を適用した橋梁の施工手順が示されている。図２では、「１．鋼管打設ステップ」から「１１．踏座工ステップ」までが、正面視、側面視および平面視で示されているとともに、「１２．橋桁工ステップ」は側面視で示されている。図示に従って説明すると、まず、所望数の鋼管部材４を所定の箇所に打設する（１．鋼管打設ステップ）。次いで、各鋼管部材４を利用してその内方に杭孔５を掘削する（２．基礎杭工（掘削）ステップ）。次いで、杭孔５内に鉄筋や鉄骨などの強度部材を挿入し、さらに杭コンクリート２を打設する（３．基礎杭工（コンクリート打設）ステップ）。   Such an integrated construction method of piles and pillars is suitable not only for the construction of a general building with no footing but also for the construction of bridge legs. Can do. FIG. 2 shows a construction procedure of a bridge to which the pile and pillar integrated construction method according to the above embodiment is applied. In FIG. 2, "1. Steel pipe placing step" to "11. Step work step" are shown in front view, side view and plan view, and "12. Bridge girder step" is shown in side view. It is shown. Explaining in accordance with the drawing, first, a desired number of steel pipe members 4 are placed at predetermined locations (1. steel pipe placing step). Next, a pile hole 5 is excavated inside each steel pipe member 4 (2. Foundation pile construction (excavation) step). Next, a strength member such as a reinforcing bar or steel frame is inserted into the pile hole 5, and the pile concrete 2 is placed (3. foundation pile construction (concrete placing) step).

次いで、杭コンクリート２が未硬化状態で、吸引ホース９などを利用した吸引処理により杭頭部３の不良コンクリートを除去して、鋼管部材４内で鉄筋などの強度部材を杭頭部３に露出させる（４．杭頭処理工ステップ）。次いで、杭コンクリート２が未硬化状態で、杭頭部３の強度部材を包囲しつつ地中に残存する態様で、鋼管部材４を地盤面Ｇ上方へ引き上げる（５．鋼管引抜工ステップ）。次いで、引き上げた鋼管部材４が沈下しないよう、鋼管部材４をその外周に配設した仮受材１１で支持する（６．鋼管仮受工ステップ）。   Next, the pile concrete 2 is uncured, the defective concrete of the pile head 3 is removed by suction processing using a suction hose 9 or the like, and strength members such as reinforcing bars are exposed to the pile head 3 in the steel pipe member 4. (4. Pile head processing step). Next, the steel pipe member 4 is pulled up above the ground surface G in such a manner that the pile concrete 2 remains in the ground while surrounding the strength member of the pile head 3 in an unhardened state (5. Steel pipe drawing step). Next, the steel pipe member 4 is supported by a temporary receiving material 11 disposed on the outer periphery thereof so that the pulled steel pipe member 4 does not sink (6. Steel pipe temporary receiving step).

次いで、各鋼管部材４内に上方からコンクリート１０を打設して鋼管充填コンクリート柱形式の橋台１２をそれぞれ構築する。これにより、杭施工用の鋼管部材４を橋台１２の主体として利用する（７．橋台工（コンクリート打設）ステップ）。次いで、これら橋台１２それぞれの上端に小規模な梁様の橋台体１３を設置する（８．橋台設置ステップ）。次いで、地盤面Ｇから橋台体１３上に達するスロープ１４を形成する気泡混合土を、橋台１２を巻き込むようにして打設するための化粧型枠１５を設置する。この化粧型枠１５は仕上げ材として兼用する（９．化粧型枠設置工ステップ）。次いで、化粧型枠１５を利用し、橋台１２を巻き込むようにして気泡混合土１６を打設してスロープ１４を形成する（１０．気泡混合土工ステップ）。次いで、橋台１２上に踏座１７を設置する（１１．踏座工ステップ）。   Next, concrete 10 is placed from above into each steel pipe member 4 to construct steel pipe-filled concrete column type abutments 12 respectively. Thereby, the steel pipe member 4 for pile construction is utilized as a main body of the abutment 12 (7. Abutment (concrete placing) step). Next, a small beam-like abutment 13 is installed at the upper end of each of these abutments 12 (8. Abutment installation step). Next, a decorative mold 15 for placing the bubble mixed soil forming the slope 14 reaching the abutment 13 from the ground surface G so as to involve the abutment 12 is installed. This decorative mold 15 is also used as a finishing material (9. decorative mold installation step). Next, using the decorative mold 15, the bubble mixed soil 16 is driven so as to involve the abutment 12 to form the slope 14 (10. Bubble mixed earth work step). Next, the pedestal 17 is installed on the abutment 12 (11. pedestrian construction step).

以上のような作業手順により、スロープ１４付きの橋台１２を一対構築する。その後、これらスロープ１４を繋ぐために、各橋台１２上の踏座１７間に橋桁１８を掛け渡す（１２．橋桁工ステップ）。これにより、上記杭と柱の一体化施工法を利用して橋梁を建設することができる。   A pair of abutments 12 with slopes 14 is constructed by the above-described work procedure. Thereafter, in order to connect these slopes 14, a bridge girder 18 is bridged between the pedestals 17 on each abutment 12 (12. bridge girder step). Thereby, a bridge can be built using the integrated construction method of the said pile and a pillar.

以上説明した本実施形態にかかる杭と柱の一体化施工方法にあっては、場所打ちコンクリート杭１を形成する際、杭コンクリート２打設前に予め、地中から地盤面Ｇに達する鋼管部材４を配置してから、杭コンクリート２を打設し、その後、鋼管部材４を引き上げる手順を備えることから、現場打ちコンクリート杭１周りに鋼管部材４を装着するにあたって、当該現場打ちコンクリート杭１周りや鋼管部材４周りでの地盤の掘削や埋め戻しが不要で手間がかからないとともに、杭コンクリート２が硬化するまでの待ち時間も必要がなく、短期間で効率よく現場打ちコンクリート杭１に鋼管部材４を装着することができ、作業性良好に杭１と柱６とを一体化することができる。   In the pile and column integrated construction method according to the present embodiment described above, when the cast-in-place concrete pile 1 is formed, the steel pipe member that reaches the ground surface G from the ground in advance before the pile concrete 2 is placed. 4 is placed, and then the pile concrete 2 is placed, and then the steel pipe member 4 is pulled up. Therefore, when the steel pipe member 4 is mounted around the spot cast concrete pile 1, the spot cast concrete pile 1 around In addition, excavation and backfilling of the ground around the steel pipe member 4 is not required, and there is no need for trouble, and there is no need for a waiting time until the pile concrete 2 is hardened. The pile 1 and the column 6 can be integrated with good workability.

また、鋼管部材４を、杭コンクリート２打設前には、杭頭部３を取り囲むように配置し、鋼管部材４の引き上げ前もしくは引き上げ後に鉄筋８や鉄骨部材などの強度部材の露出作業を行い、そして鋼管部材４の引き上げ後にその内部に柱コンクリート１０を打設して杭頭部３の鉄筋８などの強度部材を埋設するようにして、これによって、引き上げられた地盤面Ｇ上方に露出された鋼管部材４の露出部分を鋼管充填コンクリート柱６の下部として形成するようにしたので、杭１と柱６の一体化に寄与する杭頭部３の鉄筋８など強度部材の露出処理の円滑性を確保しつつ、現場打ちコンクリート杭１と鋼管充填コンクリート柱６とを、鋼管部材４を構造強度的に複合させてまさに一体化することができる。   Further, the steel pipe member 4 is disposed so as to surround the pile head 3 before the pile concrete 2 is placed, and the steel pipe member 4 is exposed before or after the steel pipe member 4 is pulled up, and the strength member such as the reinforcing bar 8 or the steel frame member is exposed. Then, after the steel pipe member 4 is pulled up, the column concrete 10 is placed therein, and strength members such as the reinforcing bars 8 of the pile head 3 are buried, so that the exposed ground surface G is exposed. Since the exposed part of the steel pipe member 4 is formed as the lower part of the steel pipe-filled concrete column 6, the smoothness of the exposure process of the strength member such as the reinforcing bar 8 of the pile head 3 that contributes to the integration of the pile 1 and the column 6. It is possible to exactly integrate the cast-in-place concrete pile 1 and the steel pipe-filled concrete column 6 by combining the steel pipe member 4 in terms of structural strength.

また、杭コンクリート２の未硬化状態で、杭頭部３の杭コンクリート２を吸引除去することにより鉄筋８などの強度部材の露出作業を行うようにしたので、簡便にかつ効率よく作業を完了することができる。さらに、杭コンクリート２の未硬化状態で鋼管部材４の引き上げ作業を行うようにしたので、当該作業も簡便かつ円滑に完了することができる。   In addition, since the pile concrete 2 of the pile head 3 is sucked and removed while the pile concrete 2 is in an uncured state, the strength member such as the reinforcing bar 8 is exposed, so the work is completed easily and efficiently. be able to. Furthermore, since the steel pipe member 4 is lifted in the uncured state of the pile concrete 2, the work can be completed easily and smoothly.

また、本実施形態にかかる杭１と柱６の一体化施工方法による橋梁の施工にあっては、杭施工用の鋼管部材４を引き上げ、その内部にコンクリート１０を打設したものを橋台１２の主体に利用し、その上に直接踏座１７を設置するようにしたので、杭１の施工とは別に橋台１２を構築する手間を削減することができる。また、橋台１２を構成する鋼管部材４が地中から引き上げられるために汚損されていても、これを巻き込むようにスロープ１４を施工するので、鋼管部材４の清掃作業などを省略することができる。また、スロープ１４を、橋台１２を巻き込むようにして打設される気泡混合土１６で施工するようにしていて、これを地中梁として考慮することが可能であり、別途地中梁を施工する手間を削減することができる。また、気泡混合土１６の打設型枠を化粧型枠１５としたので、仕上げ工を簡素化することができる。これらにより、橋梁工事を省力化することができ、短期日で橋梁を構築することができる。   Moreover, in the construction of the bridge by the integrated construction method of the pile 1 and the pillar 6 concerning this embodiment, the steel pipe member 4 for pile construction is pulled up, and what put concrete 10 in the inside is used for the abutment 12 Since it is used for the main body and the pedestal 17 is directly installed on the main body, it is possible to reduce time and labor for constructing the abutment 12 separately from the construction of the pile 1. Moreover, even if the steel pipe member 4 which comprises the abutment 12 is soiled because it is pulled up from underground, since the slope 14 is constructed so that this may be wound, the cleaning operation | work etc. of the steel pipe member 4 can be abbreviate | omitted. Further, the slope 14 is constructed with the bubble mixed soil 16 that is placed so as to involve the abutment 12, and this can be considered as an underground beam, and an underground beam is separately constructed. Time and effort can be reduced. Moreover, since the casting formwork of the bubble mixed soil 16 is the decorative formwork 15, the finishing work can be simplified. As a result, it is possible to save the bridge work and to build the bridge in a short day.

従って例えば、日中の交通量が多い道路や鉄道の上方に橋梁を構築する場合など、夜間のみの施工という制限された条件下であっても、短期間に円滑に施工を完了することができる。また、鋼管部材４を利用した橋台１２の施工精度については、小規模な橋台体１３を用意して橋台１２上に設置することで、必要な精度調整を簡便にかつ精度良く行うことができる。   Therefore, for example, when building a bridge above a road or railway with heavy traffic during the day, construction can be completed smoothly in a short time even under restricted conditions such as construction only at night. . Moreover, about the construction precision of the abutment 12 using the steel pipe member 4, a required small scale abutment 13 is prepared and installed on the abutment 12, and a required precision adjustment can be performed simply and accurately.

本発明にかかる杭と柱の一体化施工方法の好適な一実施形態を示す工程図である。It is process drawing which shows suitable one Embodiment of the pile and pillar integrated construction method concerning this invention. 本発明にかかる杭と柱の一体化施工方法を用いて橋梁を構築する手順を示す工程図である。It is process drawing which shows the procedure which constructs a bridge using the pile and pillar integrated construction method concerning this invention.

符号の説明Explanation of symbols

１ 場所打ちコンクリート杭
２ 杭コンクリート
３ 杭頭部
４ 鋼管部材
６ 鋼管充填コンクリート柱
８ 鉄筋
１０ 柱コンクリート
Ｇ 地盤面 DESCRIPTION OF SYMBOLS 1 Cast-in-place concrete pile 2 Pile concrete 3 Pile head 4 Steel pipe member 6 Steel pipe filling concrete pillar 8 Reinforcement 10 Column concrete G Ground surface

Claims (3)

鉄筋や鉄骨などの強度部材を内部に有する場所打ちコンクリート杭に鋼管充填コンクリート柱を一体化する方法であって、
上記場所打ちコンクリート杭を形成する際、杭コンクリート打設前に予め、杭頭部を取り囲んで地中から地盤面に達する鋼管部材を配置する第１工程と、
杭コンクリートを打設した後、上記場所打ちコンクリート杭の杭頭部位置の杭頭部強度部材を露出させるとともに、上記鋼管部材の下部が該杭頭部強度部材を包囲しつつ地中に残存するように、当該鋼管部材を地盤面上方へ引き上げる第２工程と、
引き上げられて地盤面上方に露出された上記鋼管部材の露出部分を上記鋼管充填コンクリート柱の下部とするために、該鋼管部材内に、柱コンクリートを打設して上記杭頭部強度部材を埋設する第３工程とを含むことを特徴とする杭と柱の一体化施工方法。 A method of integrating a steel pipe-filled concrete column into a cast-in-place concrete pile having strength members such as reinforcing bars and steel frames inside,
When forming the cast-in-place concrete pile, the first step of arranging a steel pipe member that surrounds the pile head and reaches the ground surface from the ground before placing the pile concrete;
After placing the pile concrete, the pile head strength member at the pile head position of the cast-in-place concrete pile is exposed, and the lower part of the steel pipe member remains in the ground while surrounding the pile head strength member The second step of pulling the steel pipe member upward to the ground surface,
In order to use the exposed portion of the steel pipe member that has been pulled up and exposed above the ground surface as the lower part of the steel pipe-filled concrete column, the pile head strength member is embedded in the steel pipe member by placing column concrete. The pile and the pillar integrated construction method characterized by including the 3rd process to do. 前記第２工程の露出作業は、前記杭頭部の杭コンクリートを吸引除去することにより実行されることを特徴とする請求項１に記載の杭と柱の一体化施工方法。   The pile and column integrated construction method according to claim 1, wherein the exposing operation in the second step is performed by sucking and removing the pile concrete of the pile head. 前記第２工程の引き上げ作業は、杭コンクリートの未硬化状態で実行されることを特徴とする請求項１または２に記載の杭と柱の一体化施工方法。   The pile and column integrated construction method according to claim 1 or 2, wherein the pulling work in the second step is performed in an uncured state of the pile concrete.
JP2005144898A 2005-05-18 2005-05-18 Integrated construction method of pile and column Expired - Fee Related JP4611108B2 (en)

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