JP2005090123A - Footing structure and its construction method - Google Patents

Footing structure and its construction method Download PDF

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JP2005090123A
JP2005090123A JP2003326365A JP2003326365A JP2005090123A JP 2005090123 A JP2005090123 A JP 2005090123A JP 2003326365 A JP2003326365 A JP 2003326365A JP 2003326365 A JP2003326365 A JP 2003326365A JP 2005090123 A JP2005090123 A JP 2005090123A
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footing
pile
steel
concrete
leg
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JP4175225B2 (en
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Katsuyoshi Nakanishi
克佳 中西
Mikio Koizumi
幹男 小泉
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JFE Engineering Corp
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JFE Engineering Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an economically efficient footing structure and its construction method when an interval between piles is short and a bar arrangement is difficult in a footing made of reinforced concrete (RC), or when the shortening of a construction period is persued. <P>SOLUTION: The footing structure comprises a structure leg 13, the footing F and the piles 10, in which the footing F is fitted into the piles 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、橋脚等の土木・建築構造物の基礎部分に用いるフーチング構造体、及び、その施工方法に係り、特に、杭間隔が短く、ＲＣコンクリート製のフーチングでは配筋が困難な場合、あるいは、短期施工化を追求する場合に、経済性の高いフーチング構造体、及び、その施工方法に関する。   The present invention relates to a footing structure used for a foundation part of a civil engineering / building structure such as a bridge pier and a construction method thereof, and particularly, when a pile interval is short and it is difficult to arrange a bar with RC concrete footing, or In pursuing short-term construction, the present invention relates to an economical footing structure and a construction method thereof.

図１６に例示する如く、鋼製やＲＣコンクリート製橋脚１２などの土木構造物は、その下端がフーチング部分１４を設けた基礎上に立設され、更にこの基礎は支持杭１０で支持される。   As illustrated in FIG. 16, a civil engineering structure such as a steel or RC concrete pier 12 is erected on a foundation having a footing portion 14 at the lower end, and the foundation is supported by a support pile 10.

このような橋脚等の土木構造物の基礎部分に用いるフーチング構造体のうち、（１）鋼製（又はコンクリート製）橋脚＋コンクリートフーチング＋杭のタイプのものとして、特許文献１や２が知られている。特許文献１に記載されたフーチングは、図１４に示した如く、鋼製橋脚１２と杭１０の間にコンクリートフーチング１４が設けられ、その中に鉄筋１６が配筋されている。   Patent Documents 1 and 2 are known as (1) steel (or concrete) bridge pier + concrete footing + pile type of footing structures used for the foundation of civil engineering structures such as piers. ing. In the footing described in Patent Document 1, as shown in FIG. 14, a concrete footing 14 is provided between a steel pier 12 and a pile 10, and a reinforcing bar 16 is arranged therein.

又、（２）鋼製橋脚＋鋼製フーチング＋杭のタイプのものとして、非特許文献１や非特許文献２が知られている。   In addition, Non-Patent Document 1 and Non-Patent Document 2 are known as the type of (2) steel pier + steel footing + pile.

更に、（３）構成橋脚＋鋼とコンクリートの合成フーチング＋杭のタイプのものとして、非特許文献３乃至５が知られている。   Furthermore, Non-Patent Documents 3 to 5 are known as the type of (3) structural bridge pier + steel and concrete synthetic footing + pile.

又、フーチングと杭の接続に関しては、両者を鋼管を介して接続するものが、特許文献３乃至５に記載されている。   Moreover, regarding the connection of a footing and a pile, what connects both via a steel pipe is described in patent documents 3 thru | or 5.

特開平８−２６９９１２号公報JP-A-8-269912 特許第２９７９１１４号公報Japanese Patent No. 2979114 特開２００１−１５９１４２号公報JP 2001-159142 A 特開２００２−４２９８号公報Japanese Patent Laid-Open No. 2002-4298 特開２００２−５４１５８号公報JP 2002-54158 A 「コンクリート充填鋼合成門形橋脚の工事報告」サクラダ技報Ｎｏ．１１、１〜３頁"Construction Report of Concrete Filled Steel Composite Bridge Pier" Sakurada Technical Report No. 11, 1-3 「ＱＣＩＢ工法パンフレット」ＪＦＥ、鴻池"QCIB method brochure" JFE, Konoike 「ＳＭＯＯＴＨ工法パンフレット」川田工業株式会社"SMOOTH Method Pamphlet" Kawada Industry Co., Ltd. 「みつき橋工法パンフレット」三井造船・西松建設"Mitsuki Bridge Construction Brochure" Mitsui Engineering & Shipbuilding & Nishimatsu Construction 「ＱＳ工法パンフレット」株式会社宮地鉄工所・東急建設株式会社"QS Methodology Brochure" Miyaji Iron Works, Tokyu Corporation

しかしながら、（１）のコンクリートフーチングを用いる場合には、次のような問題がある。   However, when the concrete footing of (1) is used, there are the following problems.

ａ．杭１０とフーチング１４とをフーチング本体の内部で接合するため、フーチング内で鉄筋１６が輻輳し、配筋が困難である。   a. Since the pile 10 and the footing 14 are joined inside the footing main body, the reinforcing bars 16 are congested in the footing and it is difficult to arrange the bars.

ｂ．フーチング１４内に鉄筋１６が輻輳するため、コンクリート橋脚１２中の主鉄筋をフーチング１４内で定着するのが困難である。   b. Since the reinforcing bar 16 is congested in the footing 14, it is difficult to fix the main reinforcing bar in the concrete pier 12 in the footing 14.

ｃ．現地で鉄筋１６を配筋しなければならないため、施行期間が長くなる。   c. Since the reinforcing bars 16 must be arranged locally, the enforcement period becomes longer.

又、（２）の鋼製フーチングを用いる場合には、次のような問題がある。   Further, when the steel footing (2) is used, there are the following problems.

ａ．フーチングの剛性を鋼材のみで確保するため、高コストとなる。   a. Since the footing rigidity is ensured only by the steel material, the cost becomes high.

ｂ．鋼材が土中に露出しているため、腐食し易い。   b. Since steel is exposed in the soil, it is susceptible to corrosion.

更に、（３）の合成フーチングを用いる場合にも、次のような問題がある。   Further, the following problem is also encountered when the synthetic footing (3) is used.

ａ．フーチングから杭への力の伝達機構が明確でない。   a. The force transmission mechanism from the footing to the pile is not clear.

ｂ．充填コンクリートが鋼セル毎に分離しているため、コンクリートの施工性が悪く、且つ、コンクリートの分担力が小さい。   b. Since the filled concrete is separated for each steel cell, the workability of the concrete is poor and the share of the concrete is small.

ｃ．鋼製部が大型の一体物であるため、現地までの運搬が困難である。   c. Since the steel part is a large one-piece, it is difficult to transport to the site.

ｄ．鋼製部が大型の一体物であるため、全ての杭の施工が終了した後でなければフーチングを施工できず、しかも、杭の施工誤差を吸収することが困難である。   d. Since the steel part is a large one-piece object, the footing cannot be constructed unless construction of all the piles is completed, and it is difficult to absorb construction errors of the piles.

又、フーチングと杭を、鋼管を介して接続するものは、別体の接続用鋼管が必要である。   Moreover, the thing which connects a footing and a pile via a steel pipe requires the steel pipe for a separate connection.

本発明は、前記従来の問題点を解決するべくなされたもので、別体の接続用鋼管が不要であり、杭間隔が短く、ＲＣコンクリート製のフーチングでは配筋が困難な場合、あるいは、短期間施工化を追及する場合に、経済性の高いフーチング構造体、及び、その施工方法を提供することを課題とする。   The present invention has been made to solve the above-mentioned conventional problems, and does not require a separate connecting steel pipe, the interval between piles is short, and it is difficult to arrange bars with RC concrete footing, or short-term. When pursuing inter-construction, it is an object to provide a highly economical footing structure and a construction method thereof.

本発明は、構造体脚と、フーチングと、杭とからなるフーチング構造体であって、前記フーチングを杭に嵌め込まれる形式とすることにより、前記課題を解決したものである。   The present invention is a footing structure body including a structure leg, a footing, and a pile, and solves the above problems by adopting a form in which the footing is fitted into the pile.

又、前記フーチング構造体において、前記杭に嵌め込む部材として突起付き鋼板で構成した鋼部材を用いたものである。   Moreover, in the said footing structure, the steel member comprised with the steel plate with a protrusion is used as a member inserted in the said pile.

本発明は、又、構造体脚と、フーチングと、杭とからなるフーチング構造体であって、前記フーチングをＲＣコンクリートと鋼殻スケルトンからなる合成フーチングとすることにより、前記課題を解決したものである。   The present invention is also a footing structure comprising a structure leg, a footing, and a pile, wherein the footing is a synthetic footing comprising RC concrete and a steel shell skeleton, thereby solving the above problems. is there.

又、前記鋼殻スケルトンを孔あき鋼殻としたものである。   The steel shell skeleton is a perforated steel shell.

又、前記構造体脚を鋼製構造体脚とし、且つ、該鋼製構造体脚と前記フーチングを溶接接合したものである。   The structure leg is a steel structure leg, and the steel structure leg is welded to the footing.

又、前記構造体脚をＲＣコンクリート製構造体脚とし、且つ、該ＲＣコンクリート製構造体脚と前記フーチングがＲＣコンクリート製構造体脚の主鉄筋をフーチング内で定着するようにしたものである。   Further, the structure leg is an RC concrete structure leg, and the RC concrete structure leg and the footing fix the main reinforcing bar of the RC concrete structure leg in the footing.

又、前記杭の少くとも頭部を鋼製とし、且つ、該鋼製頭部を備えた鋼製杭又は鋼管コンクリート杭と前記フーチングとを溶接接合したものである。   Further, at least the head of the pile is made of steel, and a steel pile or a steel pipe concrete pile provided with the steel head is welded and joined to the footing.

又、前記杭の少くとも頭部を鋼製とし、且つ、該鋼製頭部を備えた鋼製杭又は鋼管コンクリート杭と前記フーチングとを杭頭部の外周あるいは内周に設置したずれ止め（鉄筋、スタッド、フラットバー、アンブル等、ずれ止め（せん断キー）となる突起の全て）によって接合したものである。   Further, the pile head is made of steel at least, and the steel pile or steel pipe concrete pile provided with the steel head and the footing are installed on the outer periphery or inner periphery of the pile head ( They are joined by reinforcing bars (studs, flat bars, ambles, etc., all of projections that serve as detents (shear keys)).

又、前記杭をＲＣコンクリート製とし、且つ、該ＲＣコンクリート製杭と前記フーチングとがＲＣコンクリート製杭の主鉄筋をフーチング内で定着して接合されるようにしたものである。   Further, the pile is made of RC concrete, and the RC concrete pile and the footing are joined by fixing the main reinforcing bar of the RC concrete pile in the footing.

本発明は、又、鋼部材を予め工場で製作し、現地で、杭施行毎に前記鋼部材の杭に嵌め込まれる部分を杭頭に差し込み、杭頭部のコンクリート打設によって杭と一体化する工程を杭本数分繰り返した後、隣り合う鋼部材の上フランジ同士及び下フランジ同士をボルト接合することによって複数本の杭上に格子状に接合したＩ形断面鋼部材が一体化された状態とした後、鋼部材ウェブの上下端の孔に鉄筋を挿通することによってフーチング構造体の上面及び下面に格子鉄筋を配筋し、その後、前記鋼部材全体を被覆するようにコンクリートを打設することを特徴とするフーチング構造体の施工方法を提供するものである。   In the present invention, the steel member is also manufactured in the factory in advance, and the portion fitted into the pile of the steel member is inserted into the pile head every time the pile is applied, and integrated with the pile by placing the pile head concrete. After the process is repeated for the number of piles, the I-shaped cross-section steel members joined in a lattice form on a plurality of piles by bolting upper flanges and lower flanges of adjacent steel members and After that, lattice reinforcing bars are arranged on the upper and lower surfaces of the footing structure by inserting reinforcing bars into the upper and lower end holes of the steel member web, and then concrete is placed so as to cover the entire steel member. The construction method of the footing structure characterized by this is provided.

本発明によれば、杭とフーチングの接続が容易であり、フーチングを他の場所で作って来れるため、杭間隔が短く、ＲＣコンクリート製のフーチングでは配筋が困難な場合、あるいは、短時間施工化を追及する場合においても、経済性の高いフーチング構造体が施工できる。   According to the present invention, since the connection between the pile and the footing is easy and the footing can be made in another place, the interval between the piles is short, and it is difficult to arrange the bars with the RC concrete footing, or the construction is performed for a short time. Even in the case of pursuing conversion, a highly economical footing structure can be constructed.

以下図面を参照して、本発明の実施形態を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明に係るフーチング構造体の実施形態であり、１０は杭、１３は構造体脚、Ｆはフーチング、Ｇは地盤である。図２乃至図１０は、前記フーチング構造体の施工手順であり、図２乃至図４にそれぞれ示す施工手順１〜３を工場で予め行ない、図５〜図１０にそれぞれ示す施工手順４〜９を現地で行なう。   FIG. 1 shows an embodiment of a footing structure according to the present invention, wherein 10 is a pile, 13 is a structure leg, F is a footing, and G is the ground. FIGS. 2 to 10 are construction procedures for the footing structure. Construction procedures 1 to 3 shown in FIGS. 2 to 4 are performed in advance at the factory, and construction procedures 4 to 9 shown in FIGS. Perform locally.

具体的には、まず図２に示す施工手順１において、突起付きＨ形鋼２２を間隔をあけて４本接合して杭１０への挿入部２０を構成する。   Specifically, first, in the construction procedure 1 shown in FIG. 2, four H-shaped steels 22 with protrusions are joined at intervals to constitute the insertion portion 20 to the pile 10.

次いで図３に示す施工手順２において、上フランジ３２、下フランジ３４及びウェブ３６を溶接したＩ形断面を十字に交差させた鋼殻スケルトン３０を構成し、交差させた交点部近傍の下フランジ３４直下に前記杭挿入部２０を接合する。ここで、ウェブ３６には、鋼殻スケルトン３０を後出被覆コンクリート４６（図９参照）と一体化させるための孔３６ａが複数個設けられている。   Next, in the construction procedure 2 shown in FIG. 3, a steel shell skeleton 30 is formed by crossing the I-shaped cross section where the upper flange 32, the lower flange 34 and the web 36 are crossed, and the lower flange 34 in the vicinity of the crossed intersection. The said pile insertion part 20 is joined just under. Here, the web 36 is provided with a plurality of holes 36a for integrating the steel shell skeleton 30 with the later-described coated concrete 46 (see FIG. 9).

次いで図４に示す施工手順３で、前記杭挿入部２０の突起付きＨ形鋼２２からの伝達力を鋼殻スケルトン３０に適切に流すための補剛材４０を設置する。   Next, in the construction procedure 3 shown in FIG. 4, a stiffener 40 is installed to appropriately flow the transmission force from the protruding H-shaped steel 22 of the pile insertion portion 20 to the steel shell skeleton 30.

ここまでが予め工場で行なわれる。   This is done in the factory in advance.

次いで現地に移り、図５に示す施工手順４で、杭１０を杭頭部を残して施工した後に、鋼殻スケルトン３０の杭挿入部２０を杭頭部に上方から差し込み、コンクリートを充填して一体化する。   Next, after moving to the site and constructing the pile 10 leaving the pile head in the construction procedure 4 shown in FIG. 5, the pile insertion portion 20 of the steel shell skeleton 30 is inserted into the pile head from above and filled with concrete. Integrate.

次いで、図６乃至図８に示す手順５乃至７において、図５と同様の手順を杭４本分繰り返し、鋼殻スケルトン３０の上下フランジ３２、３４を添接板４２によってボルト結合する。   Next, in steps 5 to 7 shown in FIGS. 6 to 8, the same procedure as in FIG. 5 is repeated for four piles, and the upper and lower flanges 32 and 34 of the steel shell skeleton 30 are bolted by the attachment plate 42.

次いで、図９に示す施工手順８で、ウェブ３６の上下端の孔３６ａに鉄筋を挿通することによって、フーチングＦの上面、下面に格子鉄筋４４ａ、４４ｂを配筋し、鋼殻スケルトン３０全体を被覆するようにコンクリート４６を打設する。   Next, in the construction procedure 8 shown in FIG. 9, by inserting reinforcing bars into the holes 36 a at the upper and lower ends of the web 36, the lattice reinforcing bars 44 a and 44 b are arranged on the upper and lower surfaces of the footing F, and the entire steel shell skeleton 30 is placed. Concrete 46 is placed so as to cover it.

次いで、図１０に示す施工手順９において、構造体脚１３がコンクリート製の場合は、鋼殻スケルトン３０の格子内に構造体脚１３の主筋を定着させることによって、フーチングＦと構造体脚１３を一体化させる。一方、構造体脚１２が鋼製の場合は、Ｉ形断面鋼部材（３０）の上フランジ３２上にウェブ位置を合わせて、鋼製構造体脚１３を構成する矩形断面を溶接、あるいはボルト結合によって立ち上げる。   Next, in the construction procedure 9 shown in FIG. 10, when the structure leg 13 is made of concrete, the footing F and the structure leg 13 are fixed by fixing the main bars of the structure leg 13 in the lattice of the steel shell skeleton 30. Integrate. On the other hand, when the structure leg 12 is made of steel, the web position is aligned on the upper flange 32 of the I-shaped cross-section steel member (30), and the rectangular cross section constituting the steel structure leg 13 is welded or bolted. Launch by.

図１１、図１２、及び図１３に、それぞれ本発明の実施形態を具備するフーチング構造体の図１２のＡ−Ａ線に沿う水平断面図、図１１のＢ−Ｂ線に沿う垂直断面図、及び、図１１のＣ−Ｃ線に沿う垂直断面図を示す。図において、１１は、杭１０の主鉄筋である。   11, 12, and 13, a horizontal sectional view taken along line AA in FIG. 12 and a vertical sectional view taken along line BB in FIG. 11, respectively, of the footing structure including the embodiment of the present invention. And the vertical sectional view which follows the CC line of FIG. In the figure, 11 is the main reinforcing bar of the pile 10.

本実施形態においては、杭１０とフーチングＦとを、フーチング本体の外側で接合しているので、フーチング内で鉄筋が輻輳しない。従って、コンクリート橋脚中の主鉄筋をフーチング内で無理なく定着できる。   In this embodiment, since the pile 10 and the footing F are joined on the outside of the footing main body, the reinforcing bars do not converge in the footing. Therefore, the main reinforcement in the concrete pier can be fixed without difficulty in the footing.

又、鋼殻スケルトン３０のウェブ３６の孔３６に上下面鉄筋４４ａ、４４ｂを貫通させることにより、鉄筋の位置決めが一義的に決定でき、施工性が向上する。   Further, by passing the upper and lower surface reinforcing bars 44a and 44b through the holes 36 of the web 36 of the steel shell skeleton 30, the positioning of the reinforcing bars can be uniquely determined, and the workability is improved.

又、鋼とコンクリートの合成構造であるため、同じ寸法でＲＣコンクリート製のフーチングよりも大きな剛性を得ることができる。   In addition, since it is a composite structure of steel and concrete, it can have the same size and greater rigidity than RC concrete footings.

又、鋼材がコンクリート４６で被覆されているため、防食性に優れている。   Moreover, since the steel material is covered with the concrete 46, it is excellent in corrosion resistance.

又、杭１０とフーチングＦとの接合部材に突起付き鋼材２２を用いているので、コンクリート杭、鋼管コンクリート杭の双方の杭において、フーチングＦから杭１０へ力を伝達させることができる。なお、杭とフーチングのずれ止めは突起付き鋼材２２に限定されず、杭頭部の外周あるいは内周に設置した、鉄筋、図１４に例示するスタッド５０、図１５に例示するフラットバー５２、アンブル等、ずれ止め（せん断キー）となる突起の全てを含む。   Moreover, since the steel material 22 with a protrusion is used for the joining member of the pile 10 and the footing F, force can be transmitted from the footing F to the pile 10 in both the concrete pile and the steel pipe concrete pile. In addition, the slip prevention of a pile and a footing is not limited to the steel material 22 with a protrusion, the reinforcing bar installed in the outer periphery or inner periphery of a pile head, the stud 50 illustrated in FIG. 14, the flat bar 52 illustrated in FIG. 15, an amble Etc., including all the protrusions that serve as detents (shear keys).

又、鋼殻スケルトン３０のウェブ３６に孔３６ａを設けることにより、鋼殻スケルトン３０と被覆コンクリート４６を一体化でき、且つ添接板無しでウェブ同士を接合できる。   Moreover, by providing the hole 36a in the web 36 of the steel shell skeleton 30, the steel shell skeleton 30 and the covering concrete 46 can be integrated, and the webs can be joined without an attachment plate.

又、Ｉ形断面鋼同士を現地でボルト接合できるため、部材片を大きくでき、運搬し易い。更に、杭施工毎に段階的にＩ形断面鋼と杭とを一体化できる。   Further, since the I-shaped cross-section steels can be bolted together on the site, the member piece can be enlarged and easily transported. Further, the I-shaped cross-section steel and the pile can be integrated step by step for each pile construction.

又、鋼殻スケルトン３０の格子形状を構造体脚１３の断面寸法と一致させることにより、鋼製構造体脚１３からの力の伝達が効率的に行なえる。   Further, by making the lattice shape of the steel shell skeleton 30 coincide with the cross-sectional dimension of the structure leg 13, it is possible to efficiently transmit the force from the steel structure leg 13.

なお、前記実施形態では、接合がボルト接合とされていたが、例えば溶接による接合であっても良い。   In the above-described embodiment, the joining is bolt joining, but may be joining by welding, for example.

本発明の実施形態に係る橋梁の諸源については、対象となる構造物の種類や規模等に応じて種々異なるが、図１〜図１３の構成における寸法の一例を示せば、次のとおりである。   The various sources of the bridge according to the embodiment of the present invention differ depending on the type and scale of the target structure, but the following are examples of dimensions in the configurations of FIGS. is there.

フーチングＦの寸法は３ｍ×４ｍ×３ｍ、コンクリート製構造体脚１３の断面は２ｍ×１．５ｍ、フーチングＦ内の鋼殻スケルトン３０の格子間隔は、構造体脚１３の断面より大きくした２．５ｍ×２ｍ間隔とする。鋼殻スケルトン３０の下面に設置する突起付きＨ形鋼２２の寸法及び本数は、１格子点当り３００ｍｍ×３００ｍｍ×６００ｍｍ及び４本であり、４本の突起付きＨ形鋼２２は、コンクリートとの付着力を確保するため、４０ｍｍ以上間隔をあける。杭１０の径は１．５ｍである。鋼殻スケルトン３０の上下フランジ３２、３４は、幅０．３ｍ、板厚２５ｍｍで、ウェブ３６の板厚は１６ｍｍ、孔３６ａの径は２００ｍｍであり、上面・下面鉄筋４４ａ、４４ｂには、Ｄ２５を用いることができる。   The dimensions of the footing F are 3 m × 4 m × 3 m, the cross section of the concrete structure leg 13 is 2 m × 1.5 m, and the lattice spacing of the steel shell skeleton 30 in the footing F is larger than the cross section of the structure leg 13. The interval is 5 m × 2 m. The dimensions and the number of H-shaped steels 22 with protrusions installed on the lower surface of the steel shell skeleton 30 are 300 mm × 300 mm × 600 mm and four per lattice point. In order to ensure adhesion, a space of 40 mm or more is provided. The diameter of the pile 10 is 1.5 m. The upper and lower flanges 32 and 34 of the steel shell skeleton 30 have a width of 0.3 m, a plate thickness of 25 mm, a web 36 has a plate thickness of 16 mm, and a hole 36a has a diameter of 200 mm. The upper and lower surface reinforcing bars 44a and 44b include D25. Can be used.

本発明に係るフーチング構造体の全体構成を示す略図Schematic showing the overall structure of the footing structure according to the present invention 前記フーチング構造体の施工手順１を示す斜視図The perspective view which shows the construction procedure 1 of the said footing structure 同じく施工手順２を示す斜視図The perspective view which similarly shows construction procedure 2 同じく施工手順３を示す斜視図Similarly perspective view showing construction procedure 3 同じく施工手順４を示す斜視図The perspective view which similarly shows construction procedure 4 同じく施工手順５を示す斜視図The perspective view which similarly shows construction procedure 5 同じく施工手順６を示す斜視図The perspective view which similarly shows construction procedure 6 同じく施工手順７を示す斜視図The perspective view which similarly shows construction procedure 7 同じく施工手順８を示す斜視図The perspective view which similarly shows construction procedure 8 同じく施工手順９を示す斜視図The perspective view which similarly shows construction procedure 9 本発明に係るフーチング構造体の実施形態の図１２のＡ−Ａ線に沿う水平断面図Horizontal sectional view taken along the line AA of FIG. 12 of the embodiment of the footing structure according to the present invention. 同じく図１１のＢ−Ｂ線に沿う垂直断面図Similarly, a vertical sectional view along the line BB in FIG. 同じく図１１のＣ−Ｃ線に沿う垂直断面図Similarly, a vertical sectional view taken along the line CC in FIG. 同じくずれ止め用スタッドの例を示す斜視図The perspective view which similarly shows the example of the stud for slip prevention 同じくずれ止め用フラットバーの例を示す斜視図The perspective view which similarly shows the example of the flat bar for slip prevention 従来のフーチング構造体の概略図Schematic diagram of conventional footing structure

符号の説明Explanation of symbols

Ｆ…フーチング
Ｇ…地盤
１０…杭
１１…杭の主鉄筋
１３…構造体脚
２０…杭挿入部
２２…突起付きＨ形鋼
３０…鋼殻スケルトン
３２…上フランジ
３４…下フランジ
３６…ウェブ
３６ａ…孔
４０…補剛材
４２…添接板
４４ａ、４４ｂ…鉄筋
４６…被覆コンクリート
５０…スタッド
５２…フラットバー F ... Footing G ... Ground 10 ... Pile 11 ... Pile main reinforcement 13 ... Structure leg 20 ... Pile insertion part 22 ... H-shaped steel with projection 30 ... Steel shell skeleton 32 ... Upper flange 34 ... Lower flange 36 ... Web 36a ... Hole 40 ... Stiffener 42 ... Joining plate 44a, 44b ... Reinforcement 46 ... Coated concrete 50 ... Stud 52 ... Flat bar

Claims (10)

構造体脚と、フーチングと、杭とからなるフーチング構造体であって、前記フーチングが杭に嵌め込まれる形式であることを特徴とするフーチング構造体。   A footing structure comprising a structure leg, a footing, and a pile, wherein the footing is fitted into the pile. 請求項１記載のフーチング構造体であって、前記杭に嵌め込む部材として突起付き鋼板で構成した鋼部材を用いたことを特徴とするフーチング構造体。   The footing structure according to claim 1, wherein a steel member made of a steel plate with a protrusion is used as a member fitted into the pile. 構造体脚と、フーチングと、杭とからなるフーチング構造体であって、前記フーチングがＲＣコンクリートと鋼殻スケルトンからなる合成フーチングであることを特徴とするフーチング構造体。   A footing structure comprising a structure leg, a footing, and a pile, wherein the footing is a synthetic footing comprising RC concrete and a steel shell skeleton. 請求項３記載のフーチング構造体であって、前記鋼殻スケルトンが孔あき鋼殻であることを特徴とするフーチング構造体。   The footing structure according to claim 3, wherein the steel shell skeleton is a perforated steel shell. 請求項１乃至４のいずれかに記載のフーチング構造体であって、前記構造体脚が鋼製構造体脚であり、且つ、該鋼製構造体脚と前記フーチングが溶接接合されていることを特徴とするフーチング構造体。   The footing structure according to any one of claims 1 to 4, wherein the structure leg is a steel structure leg, and the steel structure leg and the footing are welded. Feature footing structure. 請求項１乃至４のいずれかに記載のフーチング構造体であって、前記構造体脚がＲＣコンクリート製構造体脚であり、且つ、該ＲＣコンクリート製構造体脚と前記フーチングがＲＣコンクリート製構造体脚の主鉄筋をフーチング内で定着していることを特徴とするフーチング構造体。   5. The footing structure according to claim 1, wherein the structure leg is an RC concrete structure leg, and the RC concrete structure leg and the footing are an RC concrete structure. A footing structure in which the main reinforcing bars of the legs are fixed in the footing. 請求項３乃至６のいずれかに記載のフーチング構造体であって、前記杭の少なくとも頭部が鋼製であり、且つ、該鋼製頭部を備えた鋼製杭又は鋼管コンクリート杭と前記フーチングとが溶接接合されていることを特徴とするフーチング構造体。   The footing structure according to any one of claims 3 to 6, wherein at least a head portion of the pile is made of steel, and the steel pile or the steel pipe concrete pile provided with the steel head portion and the footing. And a footing structure characterized by being welded together. 請求項３乃至６のいずれかに記載のフーチング構造体であって、前記杭の少なくとも頭部が鋼製であり、且つ、該鋼製頭部を備えた鋼製杭又は鋼管コンクリート杭と前記フーチングとが杭頭部の外周あるいは内周に設置したずれ止めによって接合されていることを特徴とするフーチング構造体。   The footing structure according to any one of claims 3 to 6, wherein at least a head portion of the pile is made of steel, and the steel pile or the steel pipe concrete pile provided with the steel head portion and the footing. Are joined by a stopper installed on the outer periphery or inner periphery of the pile head. 請求項３乃至６のいずれかに記載のフーチング構造体であって、前記杭がＲＣコンクリート製であり、且つ、該ＲＣコンクリート製杭と前記フーチングとがＲＣコンクリート製杭の主鉄筋をフーチング内で定着して接合されていることを特徴とするフーチング構造体。   The footing structure according to any one of claims 3 to 6, wherein the pile is made of RC concrete, and the RC concrete pile and the footing have a main reinforcing bar of the RC concrete pile in the footing. A footing structure characterized by being fixed and bonded. 鋼部材を予め工場で製作し、
現地で、杭施行毎に前記鋼部材の杭に嵌め込まれる部分を杭頭に差し込み、杭頭部のコンクリート打設によって杭と一体化する工程を杭本数分繰り返した後、
隣り合う鋼部材の上フランジ同士及び下フランジ同士をボルト接合することによって複数本の杭上に格子状に接合したＩ形断面鋼部材が一体化された状態とした後、
鋼部材ウェブの上下端の孔に鉄筋を挿通することによってフーチング構造体の上面及び下面に格子鉄筋を配筋し、
その後、前記鋼部材全体を被覆するようにコンクリートを打設することを特徴とするフーチング構造体の施工方法。 Steel members are manufactured in advance at the factory,
At the site, after inserting the part fitted into the pile of the steel member into the pile head every time the pile is implemented, and repeating the process of integrating with the pile by placing the pile head concrete for the number of piles,
After making the I-shaped cross-section steel members joined in a lattice shape on a plurality of piles by bolting the upper flanges and the lower flanges of adjacent steel members,
By inserting the reinforcing bars into the holes at the upper and lower ends of the steel member web, the reinforcing bars are arranged on the upper and lower surfaces of the footing structure,
Thereafter, concrete is cast so as to cover the entire steel member, and a footing structure construction method is provided.
JP2003326365A 2003-09-18 2003-09-18 Footing structure and construction method thereof Expired - Lifetime JP4175225B2 (en)

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