JP5541788B2 - Yamadome structure - Google Patents

Yamadome structure Download PDF

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JP5541788B2
JP5541788B2 JP2010111623A JP2010111623A JP5541788B2 JP 5541788 B2 JP5541788 B2 JP 5541788B2 JP 2010111623 A JP2010111623 A JP 2010111623A JP 2010111623 A JP2010111623 A JP 2010111623A JP 5541788 B2 JP5541788 B2 JP 5541788B2
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pedestal
abdomen
mountain retaining
ground anchor
fixed
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JP2011241533A (en
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正貴 藤本
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Gecoss Corp
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本発明は、仮設グラウンドアンカー工法における山留壁の腹起を１段（シングル）で施工できるようにした山留構造に関するものである。   The present invention relates to a mountain structure that can be constructed in one stage (single) for the rising of a mountain wall in a temporary ground anchor method.

従来の山留構造における一般的な形態は、例えば図３に示すように、山留壁の前面の親杭１１に対し、Ｈ形鋼からなる腹起１３ａ、１３ｂを２段（ダブル）に設け、上下の腹起１３ａ、１３ｂの前面側に取り付けた台座１６にグラウンドアンカー１９の後端部を固定するものである。このような山留構造は、例えば特許文献１、特許文献２等に示されている。   For example, as shown in FIG. 3, the conventional form of the conventional retaining structure is provided with two ridges 13a, 13b made of H-shaped steel in two stages (double) with respect to the parent pile 11 on the front surface of the retaining wall. The rear end portion of the ground anchor 19 is fixed to the pedestal 16 attached to the front side of the upper and lower abdominals 13a and 13b. Such a mountain structure is shown, for example, in Patent Document 1, Patent Document 2, and the like.

しかし、腹起１３ａ、１３ｂを上下２段に設ける構造では、腹起１３ａ、１３ｂを支持するブラケット１２ａ、１２ｂも上下２段必要であり、仮設材の資材量が多くなるだけでなく、施工手間も多い。   However, in the structure in which the bulges 13a and 13b are provided in two upper and lower stages, the brackets 12a and 12b that support the bulges 13a and 13b are also required in two upper and lower stages. There are also many.

これに対し、特許文献３には、「シングル腹起し山留め工法」として、親杭のブラケット上に配置される腹起をグラウンドアンカーの配置ピッチと略同じ長さに分断し、隣り合う腹起の端部の間に跨るように設置された台座にグラウンドアンカーの後端部を固定するようにしたものが記載されている。   On the other hand, in Patent Document 3, as a “single erection and mountain fastening method”, the erections arranged on the bracket of the parent pile are divided into approximately the same length as the arrangement pitch of the ground anchors, and adjacent erections are made. The thing which fixed the rear-end part of the ground anchor to the base installed so that it might straddle between the edge parts of this may be described.

特開２００４−３５３２６７号公報JP 2004-353267 A 特開２００６−０３７５５２号公報JP 2006-037552 A 特許第２７６２１２３号公報Japanese Patent No. 2762123

特許文献３記載の山留構造は、腹起が１段（シングル）であることから、仮設材の資材量を減らすことができるが、グラウンドアンカーの設置位置ごとに、短い腹起を多数設置しなければならず、却って施工手間が増すという問題がある。   The mountain structure described in Patent Document 3 can reduce the amount of material for temporary materials because the erection is one-stage (single), but many short erections are installed at each ground anchor installation position. On the contrary, there is a problem that the construction labor is increased.

また、多数に分断された腹起で山留壁を支持することになるため、１本の長い腹起を用いる場合に比べ不安定であり、信頼性の確保が難しい。   In addition, since the mountain retaining wall is supported by a large number of divided erections, it is unstable compared to the case where one long erection is used, and it is difficult to ensure reliability.

本願発明は、上述のような課題の解決を図ったものであり、仮設資材量および施工手間を大幅に減らすことができ、かつ安定性および信頼性に優れた山留構造を提供することを目的としている。   The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a mountain structure that can greatly reduce the amount of temporary materials and construction labor and is excellent in stability and reliability. It is said.

本願の請求項１に係る山留構造は、山留壁の前面に設けた複数のブラケットで支持され、フランジ面が前面側および背面側に位置するように配したＨ形鋼からなる腹起と、先端部側が地山に定着されたグラウンドアンカーと、前記グラウンドアンカーの後端部を山留壁の前面に固定し、グラウンドアンカーからの反力を前記腹起に伝えるための台座と、下部を前記腹起のフランジ間の凹部内に嵌め込んだ状態で固定され、前記台座を支持する台座受けピースとからなり、前記腹起が前記グラウンドアンカーの配置位置で分断されないようにしたことを特徴とするものである。 The mountain retaining structure according to claim 1 of the present application is supported by a plurality of brackets provided on the front surface of the mountain retaining wall, and has a bellows made of H-shaped steel arranged so that the flange surfaces are located on the front side and the back side. A ground anchor whose front end is fixed to a natural ground, a rear end portion of the ground anchor is fixed to the front surface of the mountain retaining wall, a base for transmitting reaction force from the ground anchor to the abdomen, and a lower portion is fixed in a state of fitted into the recess between the flanges of the HaraOkoshi, Ri do from the base receiving piece for supporting the pedestal, characterized in that it has not be divided by the position of the antinodes outs the ground anchor It is what.

本発明の大きな特徴の１つは、前述した特許文献３記載の発明と同様、１段の腹起（シングル）で支持する構造であることであるが、特許文献３のように腹起をグラウンドアンカーの配置位置ごとに分断せずに、腹起のフランジ間に台座受けピースおよび台座を固定する構造としたことで、施工手間が少なく、安定性および信頼性にも優れる。   One of the major features of the present invention is that it is a structure that supports a single-stage abdomen (single) as in the invention described in Patent Document 3, but the abdomen is grounded as in Patent Document 3. The structure in which the pedestal receiving piece and the pedestal are fixed between the flanges of the abdomen without being divided for each anchor arrangement position requires less work and is excellent in stability and reliability.

なお、本発明における山留壁は、例えばＳＭＷ工法、親杭横矢板工法、鋼矢板工法などの山留め工法によって構築することができ、その場合のブラケットはＳＭＷ工法におけるＨ形鋼等の形鋼、親杭横矢板工法における親杭、あるいは鋼矢板工法における鋼矢板などに設けられる。   In addition, the mountain retaining wall in the present invention can be constructed by a mountain retaining method such as the SMW method, the parent pile sheet pile method, the steel sheet pile method, etc., and the bracket in that case is a shape steel such as H-section steel in the SMW method, It is provided on the main pile in the main pile sheet pile method or the steel sheet pile in the steel sheet pile method.

請求項２は、請求項１に係る山留構造において、前記台座受けピースは、前記腹起のフランジに穿設したボルト孔を貫通するボルトにより着脱自在としたことを特徴とするものである。   According to a second aspect of the present invention, in the mountain retaining structure according to the first aspect, the pedestal receiving piece is detachable by a bolt penetrating a bolt hole drilled in the flange of the abdomen.

請求項３は、請求項１または２に係る山留構造において、前記台座は、前記腹起に固定される１対の台座受けピース間にボルト接合されていることを特徴とするものである。   According to a third aspect of the present invention, in the mountain retaining structure according to the first or second aspect, the pedestal is bolted between a pair of pedestal receiving pieces fixed to the abdomen.

台座受けピースおよび台座は、ボルトにより着脱自在とすることで、現場での取り付け、も容易となり、転用が可能である。   By making the pedestal receiving piece and the pedestal detachable with bolts, it is easy to install on the site and can be diverted.

本発明の山留構造は、１段の腹起で支持する構造であるため、従来のダブルの腹起に比べ、腹起部材やそれを支持するブラケットを半分に削減することができる。   Since the mountain retaining structure of the present invention is a structure that is supported by a single-stage abdomen, the abdomen and the bracket that supports the abdomen can be cut in half compared to the conventional double abdomen.

それに伴い、施工手間も減り、工期短縮、工費削減が図れる。   Along with this, the construction labor is reduced, and the construction period can be shortened and the construction cost can be reduced.

また、腹起が１段であるため、腹起の設置高さに制限がある場合（上部に設置スペースがとれない場合等）に有効である。   Further, since the abdomen has one stage, it is effective when the installation height of the abdomen is limited (such as when the installation space cannot be taken up).

また、台座受けピースおよび台座を腹起のフランジ間に固定するため、グラウンドアンカーの突出量が少なく、ほぼ腹起の幅内に納めることができるため、内側の躯体工事等の障害とならない。   Further, since the pedestal receiving piece and the pedestal are fixed between the flanges of the flank, the amount of projection of the ground anchor is small and can be accommodated within the width of the flank.

引用文献３記載の発明のように腹起が短く分断されることがないため、施工手間が少なく、安定性および信頼性にも優れる。   Since the abdominal erection is not shortly divided as in the invention described in the cited document 3, there is little construction work and excellent stability and reliability.

本発明の山留構造の一実施形態における山留壁前面の断面図（図２のＢ−Ｂ断面）である。It is sectional drawing (BB cross section of FIG. 2) of the mountain retaining wall front surface in one Embodiment of the mountain retaining structure of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 従来例の腹起が２段（ダブル）の山留構造の断面図である。It is sectional drawing of the mountain retaining structure of the 2 steps (double) of the abdomen of the prior art example.

以下、本発明の実施形態について、図面に基づいて詳細に説明する。なお、本発明は、以下に説明する実施形態に限定されるものではない。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below.

図１および図２は、本発明の一実施形態を示したもので、本実施形態における山留構造は、山留壁を構成するＨ形鋼からなる山留杭１の前面に設けた複数のブラケット２で支持され、フランジ面が前面側および背面側に位置するように配したＨ形鋼からなる腹起３と、先端部側が地山に定着されたグラウンドアンカー９と、グラウンドアンカー９の後端部を山留壁の山留杭１の前面に固定し、グラウンドアンカー９からの反力を腹起３に伝えるための台座６と、腹起３のフランジ間に固定され、台座６を支持する台座受けピース５とからなる。   1 and 2 show an embodiment of the present invention, and the mountain structure in this embodiment is a plurality of piles 1 provided on the front surface of a pile pile 1 made of H-shaped steel constituting the mountain wall. An abdomen 3 made of H-shaped steel supported by the bracket 2 so that the flange surfaces are located on the front side and the back side, a ground anchor 9 with the tip side fixed to a natural ground, and the rear of the ground anchor 9 The end is fixed to the front surface of the mountain retaining pile 1 of the retaining wall, and is fixed between the pedestal 6 for transmitting the reaction force from the ground anchor 9 to the flank 3 and the flange of the flank 3 to support the pedestal 6 It comprises a pedestal receiving piece 5 that performs.

腹起３は山留壁の側圧をグランドアンカー９に伝達させる部材であり、山留杭１前面のブラケット２に載置し、アングル等からなるずれ止め４で固定している。   The abdomen 3 is a member that transmits the lateral pressure of the mountain retaining wall to the ground anchor 9, and is placed on the bracket 2 on the front surface of the mountain retaining pile 1 and fixed by a detent 4 made of an angle or the like.

台座受けピース５は、台座６と腹起３を連結する部材であり、図２に示されるように横向きに設置されたＨ形鋼からなる腹起３のウェブと前後のフランジで形成される凹部に上から落とし込み、腹起３のウェブおよび前後のフランジにボルト７で固定する。   The pedestal receiving piece 5 is a member that connects the pedestal 6 and the protuberance 3, and as shown in FIG. 2, in the recess formed by the web of the protuberance 3 made of H-shaped steel installed sideways and the front and rear flanges. It is dropped from above and fixed to the web of the abdomen 3 and the front and rear flanges with bolts 7.

本実施形態における台座受けピース５は鋼材を組み立てて加工したものであり、上述した腹起３の凹部に嵌め込んでボルト接合される正面から見て略三角形の溝状部５ａと、台座６の端板６ｄとボルト接合される端板５ｂからなり、左右一対の台座受けピース５間に台座６を挟み込んだ形で腹起３に固定される。   The pedestal receiving piece 5 in the present embodiment is obtained by assembling and processing a steel material. The groove receiving portion 5a having a substantially triangular shape as viewed from the front surface that is fitted into the concave portion of the abdomen 3 and is bolted together, and the pedestal 6 It consists of an end plate 5b that is bolted to the end plate 6d, and is fixed to the abdomen 3 with the pedestal 6 sandwiched between a pair of left and right pedestal receiving pieces 5.

山留杭１と台座受けピース５間には、安定した支持構造を与えるため、裏込め材１０が設けられる。裏込め材１０としては、間隔調整可能なブロック状のもの（裏込めブロック）等を利用することもできる。   A back-filling material 10 is provided between the mountain pile 1 and the pedestal receiving piece 5 to provide a stable support structure. As the backfilling material 10, a block-like material (backfilling block) whose interval can be adjusted can be used.

なお、台座受けピース５を構成する鋼材の組み合わせは特に限定されず、例えば、山留部材の隅部フラットピースなどを利用すれば、安価に製作することができる。   In addition, the combination of the steel materials which comprise the base receiving piece 5 is not specifically limited, For example, if the corner flat piece of a mountain retaining member etc. are utilized, it can manufacture at low cost.

台座６も鋼材を組み立てて加工したものであり、所定間隔をおいて背中合わせに配置した１対の溝形鋼６ａ、６ｂと、溝形鋼６ａ、６ｂの両端に溶接などで取り付けた端板６ｄとからなり、溝形鋼６ａ、６ｂにはスティフナー６ｃを取り付けて補剛している。   The pedestal 6 is also made by assembling and processing a steel material. A pair of groove steels 6a and 6b arranged back to back at a predetermined interval, and an end plate 6d attached to both ends of the groove steels 6a and 6b by welding or the like. Stiffeners 6c are attached to the channel steels 6a and 6b for stiffening.

台座６を構成する溝形鋼６ａ、６ｂ間に、貫通孔を形成した定着プレート８を設置し、グラウンドアンカー９の後端部を定着させる。   A fixing plate 8 having a through hole is installed between the channel steels 6a and 6b constituting the base 6, and the rear end portion of the ground anchor 9 is fixed.

グラウンドアンカー９は、山留壁背面の安定した地盤にアンカー定着体を築造したものであり、定着プレート８の貫通孔を貫通させてプレストレスを導入し、後端部を定着させることで山留壁を支える。   The ground anchor 9 has an anchor fixing body built on a stable ground on the back of the mountain retaining wall. The ground anchor 9 penetrates the through hole of the fixing plate 8 to introduce a prestress, and fixes the rear end portion of the mountain anchor 9. Support the wall.

１…山留杭（Ｈ形鋼、鋼矢板など）、２…ブラケット（Ｈ形鋼）、３…腹起（Ｈ形鋼）、４…ずれ止め（アングル）、５…台座受けピース（加工品）、５ａ…溝状部、５ｂ…端板、５ｃ…吊り孔、６…台座（加工品）、６ａ、６ｂ…溝型鋼、６ｃ…スティフナー、６ｄ…端板、７…ボルト、８…定着プレート、９…グラウンドアンカー、１０…裏込め材   1 ... Yamadome pile (H-shaped steel, steel sheet pile, etc.) 2 ... Bracket (H-shaped steel) 3 ... Rise (H-shaped steel) 4 ... Slip stopper (angle) 5 ... Pedestal receiving piece (workpiece) ), 5a ... groove-like portion, 5b ... end plate, 5c ... suspension hole, 6 ... pedestal (processed product), 6a, 6b ... groove steel, 6c ... stiffener, 6d ... end plate, 7 ... bolt, 8 ... fixing plate , 9 ... Ground anchor, 10 ... Backfill material

Claims (3)

山留壁の前面に設けた複数のブラケットで支持され、フランジ面が前面側および背面側に位置するように配したＨ形鋼からなる腹起と、
先端部側が地山に定着されたグラウンドアンカーと、
前記グラウンドアンカーの後端部を山留壁の前面に固定し、グラウンドアンカーからの反力を前記腹起に伝えるための台座と、
下部を前記腹起のフランジ間の凹部内に嵌め込んだ状態で固定され、前記台座を支持する台座受けピースとからなり、
前記腹起が前記グラウンドアンカーの配置位置で分断されないようにしたことを特徴とする山留構造。 An uprising made of H-shaped steel supported by a plurality of brackets provided on the front surface of the mountain retaining wall and arranged such that the flange surfaces are located on the front side and the back side,
A ground anchor whose tip is fixed to the ground,
Fixing the rear end portion of the ground anchor to the front surface of the mountain retaining wall, and a base for transmitting the reaction force from the ground anchor to the abdomen,
Is fixed in a state of fitting the bottom in the recess between the flanges of the HaraOkoshi, Ri Do from the base receiving piece for supporting the pedestal,
The mountain retaining structure characterized in that the abdomen is not divided at the position where the ground anchor is disposed . 前記台座受けピースは、前記腹起のフランジに穿設したボルト孔を貫通するボルトにより着脱自在としたことを特徴とする請求項１記載の山留構造。   2. The mountain retaining structure according to claim 1, wherein the pedestal receiving piece is detachable by a bolt penetrating a bolt hole formed in the flange of the abdomen. 前記台座は、前記腹起に固定される１対の台座受けピース間にボルト接合されていることを特徴とする請求項１または２記載の山留構造。   3. The mountain retaining structure according to claim 1, wherein the pedestal is bolted between a pair of pedestal receiving pieces fixed to the abdomen.
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CN106351229B (en) * 2015-06-11 2018-06-26 叶长青 Soft clay area basement support structure
KR102134926B1 (en) * 2019-07-04 2020-07-16 한국건설기술연구원 Foundation reinforcing apparatus using bracing type supporting structure and horizontal tendon apparatus and foundation reinforcing method therewith

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