JP2007162381A - Reinforcing structure of foundation in existing underwater structure and its reinforcing method - Google Patents

Reinforcing structure of foundation in existing underwater structure and its reinforcing method Download PDF

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JP2007162381A
JP2007162381A JP2005361671A JP2005361671A JP2007162381A JP 2007162381 A JP2007162381 A JP 2007162381A JP 2005361671 A JP2005361671 A JP 2005361671A JP 2005361671 A JP2005361671 A JP 2005361671A JP 2007162381 A JP2007162381 A JP 2007162381A
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foundation
bottom plate
micropile
box
underwater structure
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JP4669386B2 (en
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Mitsuhiro Kawasaki
光洋 川崎
Koji Onoda
浩二 小野田
Tokuji Kichijima
篤司 吉嶋
Yoshitoshi Inatomi
芳寿 稲冨
Tsutomu Nakamata
強 中俣
Takashi Yamane
隆志 山根
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Penta Ocean Construction Co Ltd
Kyokuto Corp
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Penta Ocean Construction Co Ltd
Kyokuto Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing structure of a foundation in an existing underwater structure capable of simply suppressing buoyancy acting on a cofferdam box body, and its reinforcing method. <P>SOLUTION: The reinforcing structure 1 of the foundation in the existing underwater structure is seated on the bottom so as to surround the foundation 2 of the underwater structure, and a bottom plate 3 of the cofferdam box body adhered to the side of the foundation is fixed by a micro-pile 4 driven to the bottom ground 7 from a driving hole 11 at the upper surface, an additional concrete placing section 5 placed over the upper part of the bottom plate and the upper part of the foundation is formed in a dry space 32 formed by discharging water inside of the temporary cofferdam box body 29, and the body 8 of the cofferdam box body is separated to make the bottom plate 3 as a left-in-place-material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は既存水中構造物における基礎の補強構造およびその補強工法に関するものである。   The present invention relates to a reinforcing structure for a foundation in an existing underwater structure and its reinforcing method.

従来、既存の水中構造物の基礎を補強する工法としては、図１１に示すように、鋼矢板（または鋼管矢板）３４を基礎３５の周りに打設する仮締切工法３６がある。またこの他にも鋼矢板による二重仮締切工法または鋼管矢板井筒工法（図示せず）などがある。しかし、これらの工法はいずれも大規模な工事となるため工費および工期が嵩み、河積を阻害するという問題があった。そこで図１２に示すように、仮締切函体３７を基礎３５の周りに設置する仮締切工法３８が開発された。また、その他の方法としては、例えば特開平１０−１４０５８３号公報の発明がある。
特開平１０−１４０５８３号公報 Conventionally, as a method of reinforcing a foundation of an existing underwater structure, there is a temporary closing method 36 in which a steel sheet pile (or steel sheet pile) 34 is driven around a foundation 35 as shown in FIG. In addition, there are a double temporary closing method using a steel sheet pile or a steel pipe sheet pile method (not shown). However, each of these methods has a problem that the construction cost and construction period are increased due to the large-scale construction, and the river volume is obstructed. Accordingly, as shown in FIG. 12, a temporary closing method 38 in which a temporary closing box 37 is installed around the foundation 35 has been developed. As another method, for example, there is an invention disclosed in JP-A-10-140583.
Japanese Patent Laid-Open No. 10-140583

しかし、上記の仮締切工法は仮締切函体の内側の水を排水したときに、仮締切函体に作用する浮力を抑えるのが非常に困難であるという問題があった。   However, the above-mentioned temporary closing method has a problem that it is very difficult to suppress the buoyancy acting on the temporary closing box when the water inside the temporary closing box is drained.

本発明は上記のような問題に鑑みてなされたものであり、その目的は、仮締切函体に作用する浮力を簡単に抑えることができる既存水中構造物における基礎の補強構造およびその補強工法を提供することである。   The present invention has been made in view of the above problems, and its purpose is to provide a reinforcing structure for a foundation in an existing underwater structure and its reinforcing method capable of easily suppressing buoyancy acting on a temporary closing box. Is to provide.

本願発明の既存水中構造物における基礎の補強構造は、水中構造物の基礎を囲むようにして水底に着座され、かつ基礎の側面に密接された仮締切函体の底板が、上面の打設孔から水底地盤に打設されたマイクロパイルで固定され、仮締切函体の内側における水を排水して形成されたドライな空間において底板上部と基礎上部とにわたって増し打ち部が形成され、仮締切函体の本体が切り離された底板が埋め殺されたことを特徴とする。またマイクロパイルと打設孔との間には充填材が充填され、底板上面から突出したマイクロパイルの頭部には固定具がねじ込まれたことを含む。また充填材が充填された打設孔におけるマイクロパイルにはせん断キーが設けられたことを含むものである。   The foundation reinforcement structure of the existing underwater structure according to the present invention is such that the bottom plate of the temporary closing box, which is seated on the bottom of the water so as to surround the foundation of the underwater structure and is in close contact with the side of the foundation, In the dry space formed by draining the water inside the temporary clamping box, the additional punching part is formed across the top of the bottom plate and the upper part of the foundation. It is characterized in that the bottom plate from which the main body is cut is buried. In addition, a filler is filled between the micropile and the placement hole, and the fixing tool is screwed into the head of the micropile protruding from the upper surface of the bottom plate. In addition, the micropile in the placement hole filled with the filler includes that a shear key is provided.

また既存水中構造物における基礎の補強工法は、水中構造物の基礎を囲むようにして仮締切函体を水底に着座させるとともに、基礎の側面に密接させた底板をマイクロパイルで固定し、仮締切函体の内側における水を排水してドライな空間を形成し、底板上部と基礎上部とにわたって増し打ち部を形成した後に、仮締切函体の本体を切り離して底板を埋め殺しにすることを特徴とする。   In addition, the foundation reinforcement method for the existing underwater structure is such that the temporary cutoff box is seated on the bottom of the water so that it surrounds the foundation of the underwater structure, and the bottom plate that is in close contact with the side of the foundation is fixed with a micropile. Water is drained inside to form a dry space, and after forming an increased striking part over the bottom plate upper part and the foundation upper part, the main body of the temporary closing box is cut off and the bottom plate is buried. .

仮締切函体に作用する浮力をマイクロパイルで抑えることができるとともに、仮締切函体の本体を底板から切り離すことにより他に転用することができ、埋め殺しとなった底板が増し打ち部の底型枠の働きをする。またマイクロパイルによる底板の固定と、マイクロパイルが打設された打設孔の止水とを完璧に行うことができる。またマイクロパイルにねじ込んだ固定具、または固定具とせん断キーとでマイクロパイルと底板との固定が強固になる。   The buoyancy acting on the temporary closing box can be suppressed with micropile, and the main body of the temporary closing box can be diverted to other parts by separating it from the bottom plate. Acts as a formwork. Further, the fixing of the bottom plate by the micropile and the water stoppage of the casting hole in which the micropile is cast can be performed perfectly. Further, the fixing between the micropile and the bottom plate is strengthened by the fixing tool screwed into the micropile or the fixing tool and the shear key.

また仮締切函体に作用する浮力をマイクロパイルで抑えつつ底板上部と基礎上部とにわたって増し打ち部を形成することにより、桁下空間の制約を受けず、従来よりも工期・工費の面で有利となり、基礎の補強を行うことができる。   In addition, by suppressing the buoyancy acting on the temporary closing box with a micropile, and forming an increased striking part over the bottom plate upper part and the foundation upper part, there is no restriction on the space under the girder, which is more advantageous in terms of construction period and cost than before Thus, the foundation can be reinforced.

以下、本発明の既存水中構造物における基礎の補強構造（以下補強構造という）およびその補強工法（以下補強工法という）の実施の形態を図面に基づいて説明する。はじめに補強構造の実施の形態について説明し、その後に補強工法の実施の形態について説明する。また各実施の形態において同じ構成は同じ符号を付して説明し、異なった構成にのみ異なった符号を付して説明する。   Embodiments of a foundation reinforcing structure (hereinafter referred to as a reinforcing structure) and a reinforcing method (hereinafter referred to as a reinforcing method) of an existing underwater structure of the present invention will be described below with reference to the drawings. First, an embodiment of the reinforcing structure will be described, and then an embodiment of the reinforcing method will be described. In the embodiments, the same components are described with the same reference numerals, and only different components are described with different reference numerals.

図１は橋脚および橋台などの補強構造１であり、この補強構造１はフーチング基礎２の周囲に埋め殺された仮締切函体の底板３がマイクロパイル４で固定され、該底板３上部とフーチング基礎２上部とにわたって増し打ち部５が形成されて構成されている。   FIG. 1 shows a reinforcing structure 1 such as a pier and an abutment. The reinforcing structure 1 has a bottom plate 3 of a temporary closing box that is buried around a footing foundation 2 fixed by a micropile 4, and an upper portion of the bottom plate 3 and a footing. An additional striking portion 5 is formed over the upper portion of the base 2.

このフーチング基礎２は水中に構築された既存のものであり、支持杭６で支持されているが耐震力不足が想定されるために補強を必要とする。このフーチング基礎２周囲の水底地盤７に仮締切函体の本体（以下本体という）８から切り離された底板３が埋め殺され、フーチング基礎２を囲むようにして支持地盤９にまで打設されたマイクロパイル４で固定されている。   The footing foundation 2 is an existing one constructed underwater, and is supported by the support pile 6 but needs to be reinforced because it is assumed that the earthquake resistance is insufficient. A micropile is formed in which the bottom plate 3 separated from the main body (hereinafter referred to as the main body) 8 of the temporary closing box is buried in the water bottom ground 7 around the footing foundation 2 and is placed on the support ground 9 so as to surround the footing foundation 2. 4 is fixed.

このマイクロパイル４は高耐力のマイクロパイル、または小径のマイクロパイルであり、頭部１０が底板３の打設孔１１から突出して増し打ち部５に埋設されている。この増し打ち部５が差し込み配筋された補強筋１２と底板３とでフーチング基礎２に一体接合されてフーチング基礎２が耐震力の大きな補強構造１になっている。   The micropile 4 is a high-pile-proof micropile or a small-diameter micropile, and the head portion 10 protrudes from the placement hole 11 of the bottom plate 3 and is embedded in the increased striking portion 5. The additional striking portion 5 is integrally joined to the footing foundation 2 by the reinforcing bar 12 and the bottom plate 3 into which the reinforcing bar 5 is inserted, and the footing foundation 2 has a reinforcing structure 1 having a large seismic resistance.

またマイクロパイル４が打設された打設孔１１には、止水を目的とした充填材（グラウトなど）１３が充填され、この打設孔１１から突出した頭部１０には雌ネジ部１４が形成され、この雌ネジ部１４には固定具１５がねじ込まれている。この固定具１５は固定リング１６とナット１７とからなり、固定リング１６を頭部１０に嵌め込んでナット１７で締め付けることにより底板３を固定する。   The placement hole 11 in which the micropile 4 is placed is filled with a filler (grouting or the like) 13 for the purpose of water stopping, and the head 10 protruding from the placement hole 11 has a female screw portion 14. , And a fixing tool 15 is screwed into the female screw portion 14. The fixture 15 includes a fixing ring 16 and a nut 17. The bottom plate 3 is fixed by fitting the fixing ring 16 into the head 10 and tightening with the nut 17.

この固定リング１６は本体８が切り離される前の仮締切函体２９に作用する浮力に抵抗するものであり、円形基盤１８とリング１９とが補強リブ２０で補強されて構成されている。よって、ナット１７でマイクロパイル４の頭部１０に固定し、ナット１７を緩めることによりマイクロパイル４の頭部から引き抜くことができる。このようにマイクロパイル４は固定具１５により底板３と接合される他、打設孔１１の充填材１３でも接合され、この充填材１３と雌ネジ部１４との接着が特に強固になる。   The fixing ring 16 resists buoyancy acting on the temporary closing box 29 before the main body 8 is cut off, and is configured by reinforcing the circular base 18 and the ring 19 with reinforcing ribs 20. Therefore, the nut 17 can be fixed to the head 10 of the micropile 4 and the nut 17 can be loosened to be pulled out from the head of the micropile 4. In this way, the micropile 4 is joined to the bottom plate 3 by the fixture 15 and also joined to the filler 13 in the placement hole 11, and the adhesion between the filler 13 and the female screw portion 14 becomes particularly strong.

またマイクロパイル４の頂部には、上面が蓋２１で閉塞されたキャップ２２が連結リング２３で接合されてマイクロパイル内からの浸水を防いでいる。このようにマイクロパイルの頭部１０には雌ネジ部１４が形成され、かつ連結リング２３でキャップ２２が接合されているため、これらが凹凸状のコッタとなって増し打ち部５との接着強度を大きくしている。   A cap 22 whose upper surface is closed by a lid 21 is joined to the top of the micropile 4 by a connecting ring 23 to prevent water from entering the micropile. As described above, since the female screw portion 14 is formed on the head portion 10 of the micropile and the cap 22 is joined by the connecting ring 23, these become an uneven cotter and the adhesive strength with the increased striking portion 5. Has increased.

一方、底板３から切り離された本体８は、複数の中空ユニット２４が積み重なって形成されたものであり、連結板２５、２６同士がボルト２７で接合されて一体になり、このボルト２７を取り外すことにより底板３から切り離されて他に転用可能となっている。したがって、仮締切函体２９はフーチング基礎２の周りに着座させるまでは一体となっているが、着座させてマイクロパイル４で底板３が固定された後に本体８を切り離すと、底板３がフーチング基礎２の周囲に埋め殺しになる。   On the other hand, the main body 8 separated from the bottom plate 3 is formed by stacking a plurality of hollow units 24, and connecting plates 25 and 26 are joined together by bolts 27 to be integrated, and the bolts 27 are removed. Is separated from the bottom plate 3 and can be diverted to others. Accordingly, the temporary closing box 29 is integrated until it is seated around the footing foundation 2, but when the base plate 8 is detached after being seated and fixed by the micropile 4, the bottom plate 3 is removed from the footing foundation 2. 2 will be buried around.

また図６はマイクロパイル４の他の接合構造を示したものであり、打設孔１１の雌ネジ部１４に設けたリング状のせん断キー２８と充填材１３との接着力によって接合したものである。   FIG. 6 shows another joining structure of the micropile 4, which is joined by the adhesive force between the ring-shaped shear key 28 provided in the female screw portion 14 of the placement hole 11 and the filler 13. is there.

また図７は本体８の他の接合構造を示したものであり、上記の場合のように本体８が底板３において接合された場合に限らず、本体８においても接合することができる。   FIG. 7 shows another joining structure of the main body 8, and not only when the main body 8 is joined at the bottom plate 3 as described above, but also at the main body 8.

また、上記の仮締切函体２９の本体８は、中空ユニット（二重）２４が上下に重ね合わされて形成された函体３０だけではなく、図８に示すように、外殻鋼板２４ａの内側に補強リブ２４ｂが設置されたユニット（二重ではなく一枚）３０ａを上下に接合して形成することもできる。   In addition, the main body 8 of the temporary closing box 29 is not limited to the box 30 formed by superposing the hollow units (double) 24 one above the other, but as shown in FIG. It is also possible to form a unit (a single piece, not a double piece) 30a provided with reinforcing ribs 24b on the top and bottom.

次に、補強工法を図９および図１０に基づいて説明する。この補強工法には、上記と同じ仮締切函体２９が使用される。この仮締切函体２９は、水中のフーチング基礎２を囲めるような平面円形または多角形の本体８と、これに着脱自在に取り付けられた底板３とから構成され、この底板３にはマイクロパイル４を打設する打設孔１１が適宜間隔ごとに設けられている。本体８は平面半円形または半多角形の二つの函体３０が合致して構成され、該函体３０は複数の中空ユニット２４が上下に重ね合わされて形成され、この中空ユニット２４への水の注排水によって仮締切函体２９が浮き沈みするようになっている。一方、底板３も先端がフーチング基礎２の側面に密着してこれを囲めるようになっている。   Next, the reinforcing method will be described with reference to FIGS. The same temporary closing box 29 as described above is used for this reinforcing method. The temporary cutoff box 29 is composed of a planar circular or polygonal body 8 that surrounds the underwater footing foundation 2 and a bottom plate 3 that is detachably attached to the bottom plate 3. Are provided at appropriate intervals. The main body 8 is constructed by matching two flat semicircular or semipolygonal boxes 30, and the box 30 is formed by superposing a plurality of hollow units 24 one above the other. The temporary closing box 29 is raised and lowered by the drainage. On the other hand, the bottom plate 3 also has a tip closely attached to the side surface of the footing foundation 2 so as to surround it.

この仮締切函体２９を水上曳航または台船にて運搬し、図８に示すように、フーチング基礎２を囲むようにして水底に着座させた後、支保工３１を設置して据え付けを行うが、この据え付け前に水底面に土砂が堆積している場合はその浚渫を行う。   This temporary deadline box 29 is transported by water towing or a trolley, and as shown in FIG. 8, after being seated on the bottom of the water so as to surround the footing foundation 2, a support 31 is installed and installed. If sediment has accumulated on the bottom of the water before installation, perform dredging.

次に、フーチング基礎２を囲むように仮締切函体の底板３における全ての打設孔１１から支持地盤９までマイクロパイル４を打設する。次に、このマイクロパイル４が打設された打設孔１１内に充填材１３を充填して止水した後、底板３上面から突出したマイクロパイルの頭部１０に固定具１５を取り付けるとともに、キャップ２２を設置してマイクロパイル４の内側からの水の浸入も防ぐことができる。このような固定と止水とを行った後、仮締切函体２９の内側における水を排水してドライな空間３２を形成すると、仮締切函体２９には大きな浮力が作用するが、これがマイクロパイル４で抑えられる。   Next, the micropile 4 is driven from all the setting holes 11 to the support ground 9 in the bottom plate 3 of the temporary closing box so as to surround the footing foundation 2. Next, after filling the filling hole 13 into which the micropile 4 is placed and filling the filling material 13 with water, the fixing tool 15 is attached to the head 10 of the micropile protruding from the upper surface of the bottom plate 3, The cap 22 can be installed to prevent water from entering from the inside of the micropile 4. After such fixing and water stopping, when the water inside the temporary closing box 29 is drained to form a dry space 32, a large buoyancy acts on the temporary closing box 29. Suppressed with pile 4.

次に、図１０に示すように、仮締切函体の内側のドライな空間３２においてフーチング基礎２の周囲に補強筋１２を配筋するとともに、底板３上部とフーチング基礎２上部とにコンクリートを打設して増し打ち部５を形成する。この増し打ち部５にはマイクロパイルの頭部１０も埋設される。   Next, as shown in FIG. 10, the reinforcing bars 12 are arranged around the footing foundation 2 in the dry space 32 inside the temporary closing box, and the concrete is applied to the upper part of the bottom plate 3 and the upper part of the footing foundation 2. And an additional striking portion 5 is formed. A micropile head 10 is also embedded in the additional hitting portion 5.

このように増し打ち部５が形成された後に、図７に示すように、本体８を底板３から切り離して他に転用すると、底板３がフーチング基礎２の周りに埋め殺しとなる。したがって、簡単な方法で図１に示すような補強構造１を構築することができるようなる。   After the additional striking portion 5 is formed in this way, as shown in FIG. 7, when the main body 8 is separated from the bottom plate 3 and used elsewhere, the bottom plate 3 is buried around the footing foundation 2. Therefore, the reinforcing structure 1 as shown in FIG. 1 can be constructed by a simple method.

本体を底板から切り離した補強構造の断面図である。It is sectional drawing of the reinforcement structure which cut | disconnected the main body from the baseplate. 本体を底板から切り離した補強構造の断面図である。It is sectional drawing of the reinforcement structure which cut | disconnected the main body from the baseplate. 補強構造の平面図である。It is a top view of a reinforcement structure. 補強構造の要部拡大断面図である。It is a principal part expanded sectional view of a reinforcement structure. （１）は打設孔の断面図、（２）は同平面図である。(1) is a sectional view of the placement hole, and (2) is a plan view thereof. マイクロパイルが打設された他の打設孔の断面図である。It is sectional drawing of the other placement hole by which the micropile was cast. 他の仮締切函体の本体の断面図である。It is sectional drawing of the main body of another temporary closing box. 他の仮締切函体の本体であり、（１）は平面図、（２）は断面図である。It is the main body of another temporary closing box, (1) is a top view, (2) is sectional drawing. 仮締切函体を据え付けたフーチング基礎の断面図である。It is sectional drawing of the footing foundation which installed the temporary closing box. 本体を底板から切り離したフーチング基礎の断面図である。It is sectional drawing of the footing foundation which cut | disconnected the main body from the baseplate. 従来の仮締切工法であり、（１）は断面図、（２）は同平面図である。This is a conventional temporary closing method, in which (1) is a cross-sectional view and (2) is a plan view thereof. 仮締切函体を使用した従来の仮締切工法の断面図である。It is sectional drawing of the conventional temporary deadline construction method using a temporary deadline box.

符号の説明Explanation of symbols

１ 補強構造
２、３５ フーチング基礎
３ 底板
４ マイクロパイル
５ 増し打ち部
６ 支持杭
７ 水底地盤
８ 仮締切函体の本体
９ 支持地盤
１０ マイクロパイルの頭部
１１ 打設孔
１２ 補強筋
１３ 充填材
１４ 雌ネジ部
１５ 固定具
１６ 固定リング
１７ ナット
１８ 円形基盤
１９ リング
２０、２４ｂ 補強リブ
２１ 蓋
２２ キャップ
２３ 連結リング
２４ 中空ユニット
２４ａ 外殻鋼板
３０ａ ユニット
２５、２６ 連結板
２７ ボルト
２８ せん断キー
２９、３７ 仮締切函体
３０ 函体
３１ 支保工
３２ ドライな空間
３４ 鋼矢板
３６、３８ 仮締切工法 DESCRIPTION OF SYMBOLS 1 Reinforcement structure 2, 35 Footing foundation 3 Bottom plate 4 Micropile 5 Additional punching part 6 Support pile 7 Submarine ground 8 Main body of temporary closing box 9 Support ground 10 Micropile head 11 Punching hole 12 Reinforcing bar 13 Filler 14 Female thread part 15 Fixing tool 16 Fixing ring 17 Nut 18 Circular base 19 Ring 20, 24b Reinforcement rib 21 Lid 22 Cap 23 Connecting ring 24 Hollow unit 24a Outer shell steel plate 30a Unit 25, 26 Connecting plate 27 Bolt 28 Shear key 29, 37 Temporary cutoff box 30 Box 31 Supporting work 32 Dry space 34 Steel sheet pile 36, 38 Temporary cutoff method

Claims (6)

水中構造物の基礎を囲むようにして水底に着座され、かつ基礎の側面に密接された仮締切函体の底板が、上面の打設孔から水底地盤に打設されたマイクロパイルで固定され、仮締切函体の内側における水を排水して形成されたドライな空間において底板上部と基礎上部とにわたって増し打ち部が形成され、仮締切函体の本体が切り離されて底板が埋め殺されたことを特徴とする既存水中構造物おける基礎の補強構造。   The bottom plate of the temporary closing box, which is seated on the bottom of the water so as to surround the foundation of the underwater structure and is in close contact with the side of the foundation, is fixed by the micropile placed in the bottom of the ground from the upper hole. In the dry space formed by draining the water inside the box, an extra striking part is formed over the upper part of the bottom plate and the upper part of the foundation, the main body of the temporary closing box is cut off and the bottom plate is buried Reinforcement structure of foundation in existing underwater structure. マイクロパイルと打設孔との間には充填材が充填され、底板上面から突出したマイクロパイルの頭部には固定具がねじ込まれたことを特徴とする請求項１に記載の既存水中構造物における基礎の補強構造。   The existing underwater structure according to claim 1, wherein a filler is filled between the micropile and the placement hole, and a fixing tool is screwed into a head of the micropile protruding from the upper surface of the bottom plate. Reinforcement structure of foundation in 充填材が充填された打設孔におけるマイクロパイルにはせん断キーが設けられたことを特徴とする請求項２に記載の既存水中構造物における基礎の補強構造。   The reinforcing structure for a foundation in an existing underwater structure according to claim 2, wherein a shear key is provided in the micropile in the placement hole filled with the filler. 仮締切函体は基礎を囲めるような平面円形または多角形の本体と、この本体に着脱自在に取り付けられた底板とから構成され、この底板にはマイクロパイルを打設するための打設孔が適宜間隔ごとに設けられたことを特徴とする請求項１〜３のいずれかに記載の既存水中構造物における基礎の補強構造。   The temporary cut-off box is composed of a flat circular or polygonal main body that surrounds the foundation and a bottom plate that is detachably attached to the main body. The bottom plate has a placement hole for placing a micropile. The reinforcement structure of the foundation in the existing underwater structure in any one of Claims 1-3 provided suitably for every space | interval. 本体は複数の中空ユニットを上下に重ね合わせて形成した函体、または外殻鋼板の内側に補強リブが設置されたユニットを上下に重ね合わせて形成した函体であることを特徴とする請求項４に記載の既存水中構造物における基礎の補強構造。   The main body is a box formed by stacking a plurality of hollow units vertically, or a box formed by stacking units with reinforcing ribs installed on the inner side of the outer shell steel plate. 4. A reinforcing structure of a foundation in the existing underwater structure according to 4. 水中構造物の基礎を囲むようにして仮締切函体を水底に着座させるとともに、基礎の側面に密接させた底板をマイクロパイルで固定し、仮締切函体の内側における水を排水してドライな空間を形成し、底板上部と基礎上部とにわたって増し打ち部を形成した後に、仮締切函体の本体を切り離して底板を埋め殺しにすることを特徴とする既存水中構造物における基礎の補強工法。   The temporary closing box is seated on the bottom of the water so as to surround the foundation of the underwater structure, and the bottom plate that is in close contact with the side of the foundation is fixed with a micropile, and the water inside the temporary closing box is drained to create a dry space. A foundation reinforcement method in an existing underwater structure, characterized in that, after forming and forming an additional punching portion over the bottom plate upper portion and the foundation upper portion, the main body of the temporary closing box is cut off and the bottom plate is buried.
JP2005361671A 2005-12-15 2005-12-15 Reinforcement structure of foundation in existing underwater structure and its reinforcement method Expired - Fee Related JP4669386B2 (en)

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KR101038723B1 (en) 2010-10-28 2011-06-02 이용오 Reinforcement structure of footing body and reinforcement method using this building cutoff collar, scouring protection and supporting
KR101072958B1 (en) 2011-05-18 2011-10-12 삼성물산 주식회사 Foundation structure using the micropile and truss, and construction method thereof in a surrounding structure and the places that it is adjacent to
JP5509374B1 (en) * 2013-07-16 2014-06-04 黒沢建設株式会社 Seismic strengthening structure and seismic strengthening method for existing buildings
KR102638837B1 (en) * 2023-12-14 2024-02-22 이엘엔지니어링(주) Steel support for pre-construction of externally attached earthquake-reinforced superstructure and construction method using the same

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JP2000273881A (en) * 1999-03-24 2000-10-03 Toyo Constr Co Ltd Aseismatic reinforcing construction method for existing structure foundation
JP2005226326A (en) * 2004-02-13 2005-08-25 Ohbayashi Corp Reinforcing structure for existing pier foundation and reinforcing method for the existing pier foundation
JP2006265844A (en) * 2005-03-22 2006-10-05 Penta Ocean Constr Co Ltd Reinforcing structure of underwater foundation of existing structure and its reinforcing construction method

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Publication number Priority date Publication date Assignee Title
JP2000273881A (en) * 1999-03-24 2000-10-03 Toyo Constr Co Ltd Aseismatic reinforcing construction method for existing structure foundation
JP2005226326A (en) * 2004-02-13 2005-08-25 Ohbayashi Corp Reinforcing structure for existing pier foundation and reinforcing method for the existing pier foundation
JP2006265844A (en) * 2005-03-22 2006-10-05 Penta Ocean Constr Co Ltd Reinforcing structure of underwater foundation of existing structure and its reinforcing construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101038723B1 (en) 2010-10-28 2011-06-02 이용오 Reinforcement structure of footing body and reinforcement method using this building cutoff collar, scouring protection and supporting
KR101072958B1 (en) 2011-05-18 2011-10-12 삼성물산 주식회사 Foundation structure using the micropile and truss, and construction method thereof in a surrounding structure and the places that it is adjacent to
JP5509374B1 (en) * 2013-07-16 2014-06-04 黒沢建設株式会社 Seismic strengthening structure and seismic strengthening method for existing buildings
KR102638837B1 (en) * 2023-12-14 2024-02-22 이엘엔지니어링(주) Steel support for pre-construction of externally attached earthquake-reinforced superstructure and construction method using the same

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