JP5285440B2 - Construction method of structure - Google Patents
Construction method of structure Download PDFInfo
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- JP5285440B2 JP5285440B2 JP2009003662A JP2009003662A JP5285440B2 JP 5285440 B2 JP5285440 B2 JP 5285440B2 JP 2009003662 A JP2009003662 A JP 2009003662A JP 2009003662 A JP2009003662 A JP 2009003662A JP 5285440 B2 JP5285440 B2 JP 5285440B2
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- wall body
- shaped steel
- pier
- mountain retaining
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Description
この発明は、構造物の構築方法、特に、大型の橋脚等の構造物を短期間に容易に構築することができる構造物の構築方法に関するものである。 The present invention relates to a structure construction method, and more particularly to a structure construction method capable of easily constructing a structure such as a large pier in a short time.
従来、橋脚等の構造物は、概略、以下のような工程を経て構築されていた。 Conventionally, structures such as piers are generally constructed through the following processes.
(1)地盤への場所打ち杭の構築工程。
(2)仮土留めの打設工程。
(3)仮土留め内の地盤の掘削工程。
(4)場所打ち杭の頭部処理工程。
(5)フーチングおよび橋脚の構築工程。
(6)埋め戻し工程。
(7)仮土留めの撤去工程。
(1) Construction process of cast-in-place piles on the ground.
(2) Temporary earth retaining placement process.
(3) The excavation process of the ground in the temporary earth retaining.
(4) Cast-in-place pile head treatment process.
(5) Footing and pier construction process.
(6) Backfill process.
(7) Temporary earth retaining removal process.
橋脚等の構造物を構築するには、上述のような多くの工程を経て構築されていたので、工期が長く、多大なコストを要していた。 In order to construct a structure such as a bridge pier, it was constructed through many processes as described above, and therefore, the construction period was long and a great deal of cost was required.
そこで、本願発明者等は、特に大型の橋脚等の構造物を短期間に容易に構築することができる構造物の構築方法を得べく、鋭意、検討を重ねた。この結果、山留め工法により基礎を構築すれば、上記工程(1)の地盤への場所打ち杭の構築工程、上記工程(2)の仮土留めの打設工程、上記工程(4)の場所打ち杭の頭部処理工程、および、上記工程(7)の仮土留めの撤去工程を省略することができるので、大型の橋脚等の構造物を短期間に容易に構築することができるといった知見を得た。 Therefore, the inventors of the present application have made intensive studies to obtain a structure construction method that can easily construct a structure such as a large pier in a short time. As a result, if the foundation is constructed by the mountain fastening method, the cast-in-place pile construction process on the ground in the above step (1), the temporary earth retaining placement step in the above step (2), the cast in place in the above step (4). Since it is possible to omit the pile head treatment process and the temporary earth retaining removal process in the above step (7), it is possible to easily construct a structure such as a large pier in a short period of time. Obtained.
この発明は、上記知見に基づきなされたもので、その目的は、大型の橋脚等の構造物を短期間に容易に構築することにある。 The present invention has been made based on the above knowledge, and an object thereof is to easily construct a structure such as a large pier in a short time.
この発明は、下記を特徴とするものである。 The present invention is characterized by the following.
請求項1に記載の発明は、断面が多角形状または閉曲線状になるように、山留め工法により地盤中に山留め壁を構築し、前記山留め壁を基礎として前記山留め壁上に構造物を構築し、前記山留め壁は、ドリルにより地盤に孔を掘りながら、前記ドリルの先端から改良液を吐出させて、円柱状の改良壁体を地盤中に形成し、このようにして形成される前記改良壁体を互いにラップさせて前記改良壁体を柱列状に形成し、前記改良壁体を形成するに際して、所定の前記改良壁体内にH形鋼を挿入し、前記構造物の、スパイラル鉄筋が巻かれたH形鋼からなる下部を、前記基礎の内側に水平に配されたH形鋼からなる連結部材を介して連結し、前記連結部分には、コンクリートを打設することに特徴を有するものである。 The invention according to claim 1 constructs a retaining wall in the ground by a retaining method so that the cross section becomes a polygonal shape or a closed curved shape, constructs a structure on the retaining wall based on the retaining wall, The retaining wall is formed in such a manner that a cylindrical improvement wall body is formed in the ground by discharging the improvement liquid from the tip of the drill while digging a hole in the ground by a drill. The improved wall body is formed in a column shape by wrapping each other, and when forming the improved wall body, H-shaped steel is inserted into the predetermined improved wall body, and the spiral rebar of the structure is wound. The lower part made of H-shaped steel is connected via a connecting member made of H-shaped steel disposed horizontally inside the foundation, and concrete is placed in the connecting part. is there.
請求項2記載の発明は、請求項1に記載の、構造物の構築方法において、前記構造物は、橋脚であることに特徴を有するものである。
The invention according to
この発明によれば、ドリルにより地盤に孔を掘りながら、前記ドリルの先端から改良液を吐出させて、円柱状の改良壁体を地盤中に形成し、このようにして形成される前記改良壁体を互いにラップさせて前記改良壁体を柱列状に形成し、前記改良壁体を形成するに際して、所定の前記改良壁体内にH形鋼を挿入することからなる山留め工法により基礎を構築することによって、場所打ち杭の構築工程や仮土留めの打設工程等を省略することができるので、大型の橋脚等の構造物を短期間に容易に構築することができる。 According to this invention, while digging a hole in the ground with a drill, the improvement liquid is discharged from the tip of the drill to form a cylindrical improved wall body in the ground, and the improved wall thus formed When the improved wall body is formed by wrapping the bodies together to form the improved wall body, a foundation is constructed by a mountain fastening method comprising inserting H-shaped steel into the predetermined improved wall body. Thus, the construction process of cast-in-place piles, the placing process of temporary earth retaining, and the like can be omitted, so that a structure such as a large pier can be easily constructed in a short time.
この発明の、構造物の構築方法の一実施態様を、図面を参照しながら説明する。この場合、構造物として橋脚を例に取るが、橋脚以外の構造物であっても良いことは言うまでもない。 An embodiment of the structure construction method of the present invention will be described with reference to the drawings. In this case, the pier is taken as an example of the structure, but it goes without saying that a structure other than the pier may be used.
図1は、この発明の、構造物の構築方法により構築された橋脚を示す部分省略断面図、図2は、図1のA−a線断面図、図3は、図1のB−B線断面図、図4は、図1のC−C線断面図である。 FIG. 1 is a partially omitted sectional view showing a pier constructed by the structure construction method of the present invention, FIG. 2 is a sectional view taken along line Aa in FIG. 1, and FIG. 3 is taken along line BB in FIG. Sectional drawing and FIG. 4 are CC sectional view taken on the line of FIG.
この発明の、構築物の構築方法は、先ず、図1および図4に示すように、断面が多角形状または閉曲線状(この例では矩形状)になるように、山留め工法により地盤中に山留め壁1を構築する。
As shown in FIGS. 1 and 4, the construction method of the present invention is as follows. First, a
山留め工法は、ドリルにより地盤に孔を掘りながら、ドリルの先端からセメントミルク、ベントナイト等からなる改良液を吐出させて、円柱状の改良壁体2を地盤中に形成し、このようにして形成される改良壁体2を互いにラップさせて改良壁体2を柱列状に形成し、改良壁体2を形成するに際して、所定の改良壁体2内にH形鋼3を挿入することからなっている(図4参照)。なお、この例では、H形鋼3は、1つおきに挿入されているが、各改良壁体2内に挿入しても良い。
In the mountain-clamping method, a cylindrical
上記山留め工法により構築された山留め壁1は、高い強度を有することは勿論、止水性に優れ、場所打ち杭を構築する場合に比べて施工速度が速く、しかも、振動や騒音が少ないといった利点を有している。従って、山留め工法により構築された山留め壁1を、構造物の基礎として使用すれば、高い強度を有する基礎を、上述した利点を生かして構築することができる。
The
次に、上記のようにして構築された山留め壁1内の地盤を掘削する。掘削深さH(図1に示す。)は、山留め壁1に連結される、後述する橋脚の下部の長さである。
Next, the ground in the
次に、山留め壁1を基礎として、山留め壁1の内側に橋脚の骨組となるH形鋼4の下部をH形鋼等からなる支保工5を介して固定する。この際、H形鋼4は、スパイラル鉄筋6等により補強する(図2、図3参照)。
Next, based on the
次に、橋脚の骨組となるH形鋼4の下部内にコンクリート7を打設する(図1中、斜線で示す。)
次に、橋脚の骨組となるH形鋼4の内、外周囲に鉄筋8、9を配し、H形鋼4の内側に橋脚の内面を形成する内側型枠10Aを組み立て、外側に橋脚の外面を形成する外側型枠10Bを組み立てる。そして、内側型枠10Aと外側型枠10Bとの間にコンクリート11を打設する。内側および外側型枠10A、10Bは、図1、図2において仮想線で示す。
Next,
Next, inside the H-
そして、コンクリート11の硬化後、内側型枠10Aおよび外側型枠10Bを撤去すれば、橋脚12を構築することができる。
And the
この発明によれば、山留め工法により構築された山留め壁1を基礎とすることによって、上述した従来の構築方法に比べて、地盤への場所打ち杭の構築工程、仮土留めの打設工程、場所打ち杭の頭部処理工程、および、仮土留めの撤去工程を省略することができるので、
橋脚等の構造物を短期間に容易に構築することができる。しかも、山留め工法により構築する山留め壁は、必要に応じて、大型化できるので、大型の構造物にも対応することができる。
According to this invention, by using the
Structures such as piers can be easily constructed in a short time. In addition, since the mountain retaining wall constructed by the mountain retaining method can be enlarged as required, it can also be applied to large structures.
1:山留め壁
2:改良壁体
3:基礎のH形鋼
4:構造物のH形鋼
5:支保工
6:スパイラル鉄筋
7:コンクリート
8:鉄筋
9:鉄筋
10A:内側型枠
10B:外側型枠
11:コンクリート
12:橋脚
1: Mountain retaining wall 2: Improved wall body 3: H-shaped steel of foundation 4: H-shaped steel of structure 5: Supporting work 6: Spiral rebar 7: Concrete 8: Reinforcing bar 9: Reinforcing
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JP2009003662A JP5285440B2 (en) | 2009-01-09 | 2009-01-09 | Construction method of structure |
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JP5285440B2 true JP5285440B2 (en) | 2013-09-11 |
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KR101219450B1 (en) * | 2010-09-28 | 2013-01-11 | 홍지기술산업주식회사 | Building structure using underground watertight wall and construction method thereof |
JP6222791B1 (en) * | 2017-06-29 | 2017-11-01 | 株式会社ハナミズキ・ブリッジ・プランニング | Seismic reinforcement method for pier foundation and seismic reinforcement method for pier foundation |
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JP2814267B2 (en) * | 1989-07-17 | 1998-10-22 | 前田建設工業株式会社 | Underground continuous wall method |
JPH0439865Y2 (en) * | 1990-02-28 | 1992-09-18 | ||
JPH06341141A (en) * | 1993-02-17 | 1994-12-13 | Fusao Sakano | Construction method of underground earth retaining wall by bored holes excavated in the ground within line separated from boundary by 500mm, and various walls like joint wall, connection wall, butt-joint wall, continuousline wall, superposed wall, cut-off wall by use the method |
JPH0849236A (en) * | 1994-05-13 | 1996-02-20 | Haseko Corp | Sheathing construction method |
JP3635167B2 (en) * | 1996-10-23 | 2005-04-06 | 新日本製鐵株式会社 | Steel pipe concrete well foundation installed on slope and its construction method |
JP2001064958A (en) * | 1999-08-26 | 2001-03-13 | Toyo Constr Co Ltd | Foundation constructing method |
JP3832845B2 (en) * | 2001-11-06 | 2006-10-11 | 財団法人鉄道総合技術研究所 | Steel sheet pile combined direct foundation and construction method of steel sheet pile combined direct foundation |
JP2006291657A (en) * | 2005-04-14 | 2006-10-26 | Shimizu Corp | Supporting structure and supporting construction method for structure |
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