JP2018028254A - Repair method of existing canal - Google Patents

Repair method of existing canal Download PDF

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JP2018028254A
JP2018028254A JP2017023915A JP2017023915A JP2018028254A JP 2018028254 A JP2018028254 A JP 2018028254A JP 2017023915 A JP2017023915 A JP 2017023915A JP 2017023915 A JP2017023915 A JP 2017023915A JP 2018028254 A JP2018028254 A JP 2018028254A
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retaining
plate
hole
pile
existing
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JP6393350B2 (en
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長谷川 寛
Hiroshi Hasegawa
寛 長谷川
大樹 塩原
Daiki Shiobara
大樹 塩原
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明和工業株式会社
Meiwa Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a repair method of existing canal, when repairing an irrigation canal 03 using a sheet pile steel plate 01, capable of constructing a surface retaining wall X capable of preventing separation, breakdown, subsidence while avoiding imposing a retaining wall soil pressure to a sheet pile steel plate 01.SOLUTION: The repair method of existing canal includes the steps of: driving plural support post piles 10 at an appropriate interval at the rear side of existing retaining wall formed of sheet pile steel plates 01 (rear pile driving work); forming a through hole 3 in the existing sheet pile steel plate 01 locating at a position corresponding each of the support post piles 10, and connecting an appropriate member 5 to the support post pile 10 through the through hole 3 (connecting member disposing work); disposing a retaining wall plate 7a to cover the sheet pile steel plate surface side and connecting to connection member 5a protruding from the through hole 3 (panel disposition work); and filling the backside of the connected and disposed retaining wall plate with an appropriate filler (filling and casting work), to thereby construct the surface retaining wall.SELECTED DRAWING: Figure 9

Description

本発明は、矢板鋼板で擁壁を形成した既存用水路の補修工法に関するものである。   The present invention relates to a repair method for an existing water channel in which a retaining wall is formed of a sheet pile steel plate.

矢板鋼板を両岸に打ち込んで擁壁とし、矢板鋼板の上端に笠木コンクリートを打設して形成した構造の灌漑のための用水路や排水路が知られている。これらの用水路は特に経年変化によって矢板鋼板部分が腐食して補修が必要となる。また一部の腐食部分の補修を行っても、いずれは他の部分も補修が必要となってくるので、腐食箇所ばかりではなく矢板鋼板の表面側に新たな擁壁を構築する手段が提案されている。   There are known irrigation channels and drainage channels for irrigation with a structure formed by driving sheet pile steel sheets on both banks to form retaining walls and casting caps concrete on the upper end of sheet pile steel sheets. These irrigation channels need to be repaired because the sheet pile steel plate portion corrodes due to aging. In addition, even if repairing some corroded parts, it will be necessary to repair other parts as well, so a means to construct a new retaining wall on the surface side of the sheet pile steel sheet as well as the corroded part has been proposed. ing.

特許文献1(特開2014−88753号公報)は、本出願人が先に提案したもので、矢板鋼板の適宜位置に装着した補強材にパネル取付部を設け、用水路底面から笠木部の下方に達する高さで、適宜幅のFRP樹脂板或いは薄鋼板等薄金属板で形成した擁壁板を、隣接する擁壁板と連続して既存矢板鋼板の表面を覆うようにパネル取付部に装着し、既存矢板鋼板と新たに設けた擁壁板の間に、セメント系充填材を充填打設して新規な表面擁壁を形成するものである。   Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-88753) has been previously proposed by the present applicant. A panel mounting portion is provided on a reinforcing member mounted at an appropriate position on a sheet pile steel plate, and is provided below the headboard portion from the irrigation channel bottom. Mount the retaining wall plate, which is made of a thin metal plate such as FRP resin plate or thin steel plate with an appropriate width, to the panel mounting part so as to cover the surface of the existing sheet pile steel plate continuously with the adjacent retaining wall plate. A new surface retaining wall is formed by filling and placing a cement filler between the existing sheet pile steel plate and the newly provided retaining wall plate.

また特許文献2(登録実用新案3201577号公報)に示されているコンクリート擁壁に装着した接続バーの先端にパネルを連結し、パネルと擁壁板の間にコンクリートを充填打設して新規な表面擁壁を構築する手段を、矢板鋼板の用水路の改修にも採用している(ストパネ工法・登録商標)。   In addition, a new surface support is obtained by connecting a panel to the tip of a connection bar attached to a concrete retaining wall shown in Patent Document 2 (Registered Utility Model 3201577) and filling and placing concrete between the panel and the retaining wall plate. The method of building the walls is also used for repairing the canal of sheet pile steel sheets (Stopane method, registered trademark).

特開2014−88753号公報。 Unexamined-Japanese-Patent No. 2014-88753. 登録実用新案3201577号公報。 Registered utility model 3201577.

矢板鋼板で構築された用水路の補修を、前記特許文献1,2で示されているように矢板鋼板の外側に新たな擁壁を構築する手段で行うことが提案され、また実施されているが、前記の手段による新規に構築される表面擁壁は、矢板鋼板とは充填コンクリートで一体化しているとは言えるが、この表面擁壁は矢板鋼板と擁壁板とのサンドイッチ構造で、且つ両者は、矢板鋼板に装着した連結部材で連結されているに過ぎない。連結部材の取付個所を腐食の程度が少ない箇所に設定したとしても、矢板鋼板は経年変化で当然その強度も低下している。このため、新規構築の表面擁壁の土圧に対する耐久力を、腐食している矢板鋼板自体で負担し、また矢板鋼板の弱体化で表面擁壁が剥離して崩落する恐れも生じてしまう。   Although it has been proposed and practiced to repair irrigation channels constructed with sheet pile steel plates by means of constructing a new retaining wall on the outside of the sheet pile steel plates as shown in Patent Documents 1 and 2 above. The surface retaining wall newly constructed by the above means can be said to be integrated with the sheet pile steel plate by filling concrete, but this surface retaining wall is a sandwich structure of the sheet pile steel plate and the retaining wall plate, and both Are merely connected by a connecting member attached to the sheet pile steel plate. Even if the attachment location of the connecting member is set at a location where the degree of corrosion is small, the strength of the sheet pile steel plate naturally decreases with time. For this reason, the durability against the earth pressure of the newly constructed surface retaining wall is borne by the corroded sheet pile steel plate itself, and the surface retaining wall may be peeled off due to weakening of the sheet pile steel plate.

そこで本発明は、矢板鋼板を使用した用水路の補修に際して、矢板鋼板と一体化し、且つ土圧負担を軽減する新規な表面擁壁を構築する新規な既存用水路の補修工法を提案したものである。   Therefore, the present invention proposes a new repair method for an existing water channel that constructs a new surface retaining wall that is integrated with the sheet steel plate and reduces the earth pressure load when repairing a water channel using a sheet pile steel plate.

本発明の請求項1記載に係る既存用水路の補修工法は、矢板鋼板で擁壁を形成した既存用水路の補修工法であって、既存擁壁背後に適宜間隔で支柱杭を打ち込み(背後杭設置工)、前記各支柱杭と対応する位置の既存矢板鋼板に連結用透孔を穿ち、前記連結用透孔を通して適宜な連結部材を支柱杭に連結し(連結部材配置工)、連結用透孔から突出する連結部材に矢板鋼板表面側を覆うように擁壁板を連結配置し(パネル設置工)、連結配置した擁壁板の背後に適宜な充填材を充填し(充填打設工)、表面擁壁を構築してなることを特徴とするものである。   The repair method for an existing water channel according to claim 1 of the present invention is a repair method for an existing water channel in which a retaining wall is formed by a sheet pile steel plate, and a pillar pile is driven at an appropriate interval behind the existing retaining wall (rear pile installation work) ), A through hole for connection is drilled in the existing sheet pile steel plate at a position corresponding to each column pile, and an appropriate connection member is connected to the column pile through the connection hole (connection member placement work). A retaining wall plate is connected to the protruding connecting member so as to cover the sheet steel sheet surface side (panel installation work), and an appropriate filler is filled behind the connected retaining wall board (filling placement work), and the surface It is characterized by building a retaining wall.

従って形成される表面擁壁は腐食が進んで老朽化した矢板鋼板の擁壁の前面に、連結部材を介して支柱杭に支持された擁壁板による壁面が形成され、擁壁板の背後が充填材で満たされて、用水路の擁壁に加わる土圧が充填材によって均等に分散されて擁壁板に加わるので、前記土圧に対する耐久力を備えた新規構築の表面擁壁で老朽化した矢板鋼板擁壁を保護することになる。即ち老朽化した矢板鋼板擁壁の土圧の負担を低減(殆どゼロとすることが好ましい)させることになる。   Therefore, the surface retaining wall is formed on the front surface of the retaining wall of the sheet steel sheet that has deteriorated due to corrosion, and a wall surface is formed by the retaining wall plate supported by the pillar pile via the connecting member. Since the earth pressure applied to the retaining wall of the irrigation channel is evenly dispersed by the filler and added to the retaining wall plate, it is aged with a newly constructed surface retaining wall with durability against the earth pressure. The sheet steel retaining wall will be protected. That is, the earth pressure burden on the aging sheet pile steel retaining wall is reduced (preferably almost zero).

また本発明の請求項2記載に係る発明は、背後杭設置工に際して、特に支柱杭を、既存用水路に設けられている笠木部に当接して打ち込んでなるもので、笠木部が切梁部材で支持されているので、支柱杭は打込み深さに応じた支持力と当接した笠木部による支持で背後土圧を受けることになる。   In the invention according to claim 2 of the present invention, in the case of the back pile installation work, in particular, the support pile is driven in contact with the headboard portion provided in the existing waterway, and the headboard portion is a beam member. Since it is supported, the pillar pile receives a back earth pressure by the support by the head portion in contact with the support force according to the driving depth.

また本発明の請求項3記載に係る発明は、前記の請求項1又は2記載の発明に加えて、既存用水路の底方における矢板鋼板に下方透孔を設け、当該下方透孔箇所から矢板鋼板裏面を用水路底面以下まで掘削して、当該背面穴内に適宜な受支持部を構築し、前記受支持部を介して埋設矢板鋼板部分に支柱杭負荷を負担させたものである。   In addition to the invention according to claim 1 or 2, the invention according to claim 3 of the present invention is provided with a lower through hole in the sheet pile steel plate at the bottom of the existing waterway, and the sheet pile steel plate from the lower through hole location. The back surface is excavated to the bottom of the irrigation channel, an appropriate receiving support portion is constructed in the back hole, and the pile pile sheet steel plate portion is loaded with the support pile load through the receiving support portion.

而して支柱杭に加わる用水路側面の背面土圧に対して、上方は笠木部で支持され、下方部は土中に打設された矢板鋼板は腐食の進行が少なく堅牢であるので、受支持部(請求項4記載の基礎ブロック体、請求項5記載の支持ブロック体、請求項6記載の打設コンクリート)を介在して前記矢板鋼板の堅牢部分に支持されるので、支柱杭をより安定して設置できるものである。   Thus, against the back side earth pressure on the side of the irrigation channel that is applied to the pillar pile, the upper part is supported by the headboard part, and the lower part is less robust to corrosion, so the sheet pile steel plate that is placed in the soil is robust. Since it is supported by the solid portion of the sheet pile steel plate through the portion (the foundation block body according to claim 4, the support block body according to claim 5, and the cast concrete according to claim 6), the column pile is more stable. Can be installed.

更に本発明の請求項5記載に係る発明は、下方透孔箇所の矢板鋼板表面側も掘削し、下方開口コの字に形成した支持ブロック体を、当該下方透孔を跨いで設置した(支持ブロック体設置工)ものであり、請求項7記載に係る発明は、背面穴に突出する連結突部を備えたパネルを下方透孔前に配置し、パネル背面及び背面穴内にコンクリートを打設して(基礎構築工)、受支持部及び擁壁板支持部を構築してなるもので、受支持部の構築と共に構築される表面擁壁の荷重を矢板鋼板に負担させる擁壁板支持部も同時に施工できるものである。   Further, the invention according to claim 5 of the present invention excavates the sheet pile steel plate surface side of the lower through hole, and installs the support block body formed in the lower opening U-shape across the lower through hole (support In the invention according to claim 7, the panel provided with the connecting projection protruding into the back hole is disposed in front of the lower through hole, and the concrete is placed in the back and back holes of the panel. (Foundation construction work), the support wall and the retaining wall plate support part are constructed, and the retaining wall plate support part that bears the load of the surface retaining wall built with the construction of the receiving support part on the sheet pile steel plate It can be constructed at the same time.

また本発明の請求項8記載に係る発明は、下方透孔を貫いてコンクリート打設を行って受支持部及び擁壁板支持部を構築する前記請求項7記載の発明の基礎構築工において、更に支柱杭に連結した連結部材とパネルとを連結し、パネルを最下方擁壁板としてなるもので、受支持部及び擁壁板支持部の構築と同時に、最下方パネル部分の連結部材配置工及びパネル設置工を実施するものである。   Further, the invention according to claim 8 of the present invention is the foundation construction work of the invention according to claim 7, wherein the receiving support portion and the retaining wall plate support portion are constructed by placing the concrete through the lower through hole. In addition, the connecting member connected to the pillar pile and the panel are connected, and the panel becomes the lowermost retaining wall plate. At the same time as the construction of the receiving support portion and the retaining wall plate support portion, the connecting member arrangement work of the lowermost panel portion And panel installation work.

また本発明の請求項9記載に係る発明は、請求項5項及び7項記載の発明のような擁壁板支持部構築工を実施しない場合に、特に擁壁板連結配置前(パネル設置工前)に矢板鋼板の表面に添って用水路底面に適宜な支持杭を適宜間隔で打ち込んでなり(受杭打込工)、構築される表面擁壁の荷重負担をなすものである。   Further, the invention according to claim 9 of the present invention is particularly effective when the retaining wall plate support portion construction work as in the inventions of claims 5 and 7 is not carried out, particularly before the retaining wall plate connection arrangement (panel installation work). A suitable support pile is driven into the bottom of the irrigation channel at an appropriate interval along the surface of the sheet pile steel plate before (loading pile driving work), and the load of the surface retaining wall to be constructed is made.

また本発明の請求項10記載に係る発明は、特に充填材がセメント系充填材としたものである。充填材としては発生土や砕石など任意であるが、特に充填材がセメント系充填材を採用すると、擁壁板がコンクリート型枠として機能することになると共に、セメントのアルカリ作用による防食効果で矢板鋼板の老朽化(腐食進行)を止めることができる。   In the invention according to claim 10 of the present invention, in particular, the filler is a cement-type filler. As the filler, the generated soil and crushed stone are optional, but when the cement-based filler is used as the filler, the retaining wall plate will function as a concrete formwork, and the sheet pile will have an anticorrosive effect due to the alkaline action of the cement. Aging (corrosion progress) of the steel sheet can be stopped.

また本発明の請求項11記載に係る発明は、特に擁壁板としてコンクリートパネルを採用するもので、コンクリート壁面の新規擁壁が構築されることになる。   The invention according to claim 11 of the present invention employs a concrete panel as the retaining wall plate, and a new retaining wall of the concrete wall surface is constructed.

また本発明の請求項12記載に係る発明は、擁壁板の背後への充填材の充填に引き続き、擁壁板頂部と既存用水路の笠木部との間を塞ぐ上部パネルを配置すると共に、当該上部パネルの背面にも充填材を充填してなる上部パネル設置工を行うもので、新規表面擁壁によって露出している既存矢板鋼板の全面を覆うことになる。   Further, in the invention according to claim 12 of the present invention, following the filling of the filler into the back of the retaining wall plate, an upper panel for closing the space between the top of the retaining wall plate and the headboard portion of the existing water channel is disposed, The upper panel installation work is performed by filling the back surface of the upper panel with a filler, and the entire surface of the existing sheet pile steel plate exposed by the new surface retaining wall is covered.

また本発明の請求項13記載に係る発明は、連結部材を支柱杭に連結する際(連結部材配置工)に、連結用透孔から支柱杭までの間の土壌を除去してなる開削穴形成を行うもので、連結部材と支柱杭との連結作業を容易に且つ確実に行うことができる。   In the invention according to claim 13 of the present invention, when the connecting member is connected to the support pile (connecting member arranging work), the excavation hole is formed by removing the soil between the connecting through hole and the support pile. Therefore, the connecting operation between the connecting member and the support pile can be easily and reliably performed.

また本発明の請求項14記載に係る発明は、開削穴形成を、既存矢板鋼板に穿った連結用透孔内に、崩壊防止用パイプを打ち込み、当該パイプ内の土壌を除去して行うようにするもので、連結部材を支柱杭に連結する際に土砂の崩落が防止されるものである。   Further, in the invention according to claim 14 of the present invention, the drilling hole is formed by driving a collapse preventing pipe into the connecting through hole formed in the existing sheet pile steel plate and removing the soil in the pipe. Therefore, when the connecting member is connected to the support pile, the collapse of the earth and sand is prevented.

また本発明の請求項15記載に係る発明は、連結部材で矢板鋼板表面側に横杆を支持し、前記横杆に擁壁板を装着してなるもので、擁壁板の設置に際して横杆における所望位置を選択できる。   The invention according to claim 15 of the present invention comprises a connecting member that supports a recumbent on the sheet pile steel plate surface side, and a retaining wall plate is mounted on the recumbent surface. The desired position in can be selected.

本発明工法は上記のとおりで、矢板鋼板の表面に形成される新規擁壁の壁面となる擁壁板が、用水路背後に打ち込んだ支柱杭で支持され、前記擁壁板の背面に適宜な充填材を充填して新規な表面擁壁を構築するもので、前記構築が効率良く行われると共に、構築された表面擁壁が矢板鋼板から分離することを防止し、且つ擁壁に加わる土圧を新規擁壁で負担することになり、その耐久力も高められる。   The construction method of the present invention is as described above, and the retaining wall plate which is the wall surface of the new retaining wall formed on the surface of the sheet pile steel plate is supported by the pillar pile driven behind the irrigation channel, and the back surface of the retaining wall plate is appropriately filled A new surface retaining wall is constructed by filling the material, and the construction is performed efficiently, and the constructed surface retaining wall is prevented from separating from the sheet pile steel plate, and earth pressure applied to the retaining wall is reduced. It will be borne by the new retaining wall, and its durability will be enhanced.

本発明工法の実施対象施工前の用水路断面図(施工前)。 Cross section of the canal before construction subject to the construction of the present invention method (before construction). 本発明工法の実施形態の作業工程(背後杭設置工及び受杭打込工)の説明図。 Explanatory drawing of the work process (back pile installation work and receiving pile driving work) of embodiment of this invention construction method. 同図(連結部材配置工)で、(イ)は断面図(ロ)は正面図。 In the same figure (connecting member arrangement work), (a) is a sectional view (b) is a front view. 同図(底面整備工及びパネル設置工)。 The figure (bottom maintenance work and panel installation work). 同図(コンクリートの充填打設工)で、(イ)は断面図(ロ)は正面図。 In this figure (concrete filling and placing work), (a) is a sectional view (b) is a front view. 同図(施工後)。 The figure (after construction). 同支柱杭及び連結部材別例の説明図。 Explanatory drawing of the same pillar pile and another example of a connection member. 同パネル設置工の別例図。 Another example of the panel installation work. 同コンクリート充填打設工の別例図で、(イ)は断面図(ロ)は正面図。 It is another figure of the concrete filling placement work, (a) is a sectional view (b) is a front view. 同背後杭設置工前の基礎ブロック体設置工(受支持部構築工)の説明図(矢板鋼板裏面掘削)。 Explanatory drawing of the foundation block body installation work (receiving support part construction work) before the back pile installation work (sheet pile back side excavation). 同基礎ブロック体設置工を行った際の背後杭設置工の説明図。 Explanatory drawing of the back pile installation work at the time of performing the foundation block body installation work. 同施工後図。 Figure after the construction. 同背後杭設置工前の支持ブロック体設置工(受支持部構築工及び擁壁板支持部構築工の同時施工)前の説明図(矢板鋼板表裏面掘削)。 Explanatory drawing before the support block body installation work (simultaneous construction of the receiving support part construction work and the retaining wall plate support part construction work) before the back pile installation work (sheet pile front and back excavation). 同支持ブロック体設置工を行った際の背後杭設置工及び連結部材配置工の別例の説明図。 Explanatory drawing of the other example of a back pile installation work at the time of performing the support block body installation work, and a connection member arrangement | positioning work. 同施工後図。 Figure after the construction. 同基礎構築工の説明図(背後杭設置工前のケーシング設置)。 Illustration of the foundation construction work (casing installation before the back pile installation work). 同図(背後杭設置工)。 Fig. (Back pile installation work). 同図(基礎コンクリート打設前)。 The same figure (before foundation concrete placement). 同図(基礎構築工施工後)。 Figure (after foundation construction work). 同図(表面擁壁構築後)。 The same figure (after surface retaining wall construction).

本発明工法が適用される補修対象の用水路は、矢板鋼板01を地盤(用水路底面)02に打ち込んで両岸からの背圧(背面土圧)を受け止めて水路03を確保し、前記矢板鋼板01の上縁に笠木部04を設けて用水路を構築している。また笠木部04は、土圧耐久力を高めるために対向笠木間に切梁部材05を架設した水路もある。   The irrigation channel to be repaired to which the present invention construction method is applied, the sheet pile steel sheet 01 is driven into the ground (bottom of the irrigation channel) 02 to receive the back pressure (back ground pressure) from both banks to secure the channel 03, and the sheet pile steel plate 01 A irrigation channel is constructed by providing a headboard portion 04 at the upper edge of the water channel. In addition, the headboard part 04 has a water channel in which a beam member 05 is installed between opposing headboards in order to increase the earth pressure durability.

実施形態として示した本発明工法は、前記の既存用水路の矢板鋼板01の表面に新規に表面擁壁Xを構築するものであり、その施工は、基本的に支柱杭10の打ち込み設置を行う背後杭設置工、表面擁壁(擁壁板7,7a,7b)を支柱杭10と連結する連結部材(5,5a,5b,5c)を設ける連結部材配置工、表面擁壁を設置するパネル設置工、連結配置した擁壁板7,7a,7bの背後にコンクリート8,8aを充填する充填打設工の順でなされる。   The construction method of the present invention shown as an embodiment is to construct a new surface retaining wall X on the surface of the sheet pile steel sheet 01 of the existing water channel, and the construction is basically performed by driving the pillar pile 10 into place. Pile installation work, connecting member placement work to provide connecting members (5, 5a, 5b, 5c) to connect the surface retaining walls (retaining wall plates 7, 7a, 7b) with the pillar piles 10, panel installation to install the surface retaining walls The construction is performed in the order of filling and placing the concrete 8 and 8a behind the retaining wall plates 7, 7a and 7b connected and arranged.

また前記の基本的な各工に加えて、構築される表面擁壁Xの荷重を受ける擁壁板支持部の構築のための受杭打込工、支柱杭10に加わる背面土圧を用水路底面02以下の埋設矢板鋼板01aに負担させる受支持部の構築を行うための基礎ブロック体設置工、更には擁壁板支持部と受支持部の双方を構築する支持ブロック体設置工及び基礎構築工等を選択的に行うと共に、必要に応じて水路03の用水路底面02の整備を行う底面整備工を行う。   Further, in addition to the basic works described above, the receiving pile driving work for the construction of the retaining wall plate support that receives the load of the surface retaining wall X to be constructed, the back surface earth pressure applied to the column pile 10 is used as the bottom surface of the water channel No. 02 foundation block body installation work for constructing a receiving support part to be borne on buried sheet pile steel sheet 01a, and further, a support block body installation work and foundation construction work for constructing both retaining wall plate support part and receiving support part Etc. are selectively performed, and a bottom surface maintenance work is performed to maintain the irrigation channel bottom surface 02 of the water channel 03 as necessary.

また前記の各工は構築しようとする表面擁壁Xの長さに対応して適宜に工区を分け、或いは部分的に先行すべき各工を適宜実施していくものである。   In addition, each of the above-mentioned works is to appropriately divide the work zone according to the length of the surface retaining wall X to be constructed, or to carry out each work that should be partially preceded.

次に各工の詳細について説明する。基本的な背後杭設置工は、単に所定の支柱杭10を既存擁壁背後に適宜間隔で打ち込むもので、打込み深さ及び間隔は用水路の環境(切梁部材05の有無及びその間隔、更には地盤強度等)によって定められるが、少なくとも用水路底面02よりも深い位置に達するようにしたもので、切梁部材05が存在している場合には、支柱杭10を笠木部04の背面に当接するように打込むことが好ましい。   Next, details of each work will be described. The basic back pile installation work is simply to drive the predetermined strut pile 10 behind the existing retaining wall at an appropriate interval, and the driving depth and interval are the environment of the irrigation channel (the presence or absence of the beam member 05 and its interval, The ground pile strength is determined at least deeper than the bottom surface 02 of the irrigation channel, and when the beam member 05 is present, the pillar pile 10 is brought into contact with the back surface of the headboard portion 04. It is preferable to drive in such a manner.

前記支柱杭10には例えばC鋼(どのような規格材を採用するか等は用水路環境によって定める)を使用し、後述する連結部材5と対応する連結部101を備えたものである。例えばC鋼の前面の所定位置(支柱杭10の打ち込み後の開削穴Cの対応位置)に、後述する連結部材5の係止突起52と対応する縦長矩形孔等を設けておく。   The pillar pile 10 is made of, for example, C steel (which standard material is adopted depending on the irrigation channel environment) and includes a connecting portion 101 corresponding to a connecting member 5 described later. For example, a vertically long rectangular hole corresponding to a locking projection 52 of the connecting member 5 described later is provided at a predetermined position on the front surface of C steel (corresponding position of the excavation hole C after driving the pillar pile 10).

また前記の支柱杭10を打ち込む前に、図10乃至16に示すように、予め用水路底面(地盤)02以下において埋設矢板鋼板01aにコンクリートブロック等の基礎ブロック体11又は支持ブロック体12を設置するブロック体の設置工を行うようにしても良い。或いは図17乃至図20に示すように支柱杭10の設置を行う背後杭設置工を含む基礎構築工を行っても良い。   Prior to driving the pillar pile 10, as shown in FIGS. 10 to 16, the foundation block body 11 such as a concrete block or the support block body 12 is previously installed on the buried sheet pile steel plate 01 a below the bottom of the irrigation channel (ground) 02. You may make it perform the installation work of a block body. Alternatively, as shown in FIGS. 17 to 20, a foundation construction work including a back pile installation work for installing the support pile 10 may be performed.

基礎ブロック体設置工を採用した場合について説明すると、使用する基礎ブロック体11は、コンクリート部縦面(周面)が矢板鋼板01の凹凸段に一致する形状か或いは矢板鋼板01の凹凸段内に納まる左右幅とし、前後幅は後述する背後杭設置工に対応させる。   The case where the foundation block body installation work is adopted will be described. The foundation block body 11 to be used has a shape in which the vertical surface (circumferential surface) of the concrete portion coincides with the uneven step of the sheet pile steel plate 01 or in the uneven step of the sheet pile steel plate 01. The left and right widths are set so that the front and rear widths correspond to the back pile installation work described later.

そして既存用水路の底方において矢板鋼板01に下方透孔13を穿設し、当該下方透孔13の箇所から矢板鋼板01裏面を用水路底面以下まで掘削して背面穴Aを形成する(図10)。この背面穴Aに基礎ブロック体11を埋設矢板鋼板01aの裏面側に当接して設置する。   And the lower through-hole 13 is drilled in the sheet pile steel plate 01 at the bottom of the existing water channel, and the back surface A is formed by excavating the back surface of the sheet steel plate 01 from the position of the lower through-hole 13 to the bottom of the water channel (FIG. 10). . In this back hole A, the basic block body 11 is placed in contact with the back side of the buried sheet pile steel plate 01a.

前記の基礎ブロック体設置工の後に、前記した支柱杭10の打ち込みを行う背後杭設置工を実施するもので、特に支柱杭10をその上下位置で笠木部04の背面と基礎ブロック体11の背面に当接するように設置する。特に基礎ブロック体11の背面側に当接或いは近接させることで、基礎ブロック体11が受支持部となる(図11)。   After the foundation block body installation work, the above-described back pile installation work for driving the pillar pile 10 is carried out. In particular, the pillar pile 10 is placed at its vertical position on the back surface of the headboard portion 04 and the back surface of the foundation block body 11. Install so that it touches. In particular, the base block body 11 becomes a receiving and supporting part by contacting or approaching the back side of the base block body 11 (FIG. 11).

尚背面穴Aは適宜埋め戻すが、残余空間はコンクリートの充填打設工に際して、コンクリートが流れ込み、埋設矢板鋼板01aと基礎ブロック体11が一体化される。   The back hole A is appropriately refilled, but the concrete flows into the remaining space during the concrete filling and placing, and the buried sheet pile steel plate 01a and the foundation block body 11 are integrated.

前記の基礎ブロック体11に替えて支持ブロック体12を採用しても良い。支持ブロック体12は、下方開口コの字状に形成したもので、後方脚部121と前方脚部122とを備えると共に、上面に下方開口個所と連通する縦孔部123を設けたものである。   A support block body 12 may be employed instead of the basic block body 11 described above. The support block body 12 is formed in a U-shaped lower opening, and includes a rear leg 121 and a front leg 122, and a vertical hole 123 communicating with the lower opening on the upper surface. .

支持ブロック体設置工は、矢板鋼板01の表面側の用水路底面02を適宜範囲で掘削して前面穴Bを形成し、前記前面穴Bに面した矢板鋼板01に、適宜高さの下方透孔13aを穿設し、更に当該下方透孔13aの箇所から矢板鋼板01裏面を用水路底面02よりも深く下方に掘削して背面穴A1を形成する(図13)。   The support block body installation work excavates the water channel bottom surface 02 on the surface side of the sheet pile steel plate 01 in an appropriate range to form a front hole B, and the sheet pile steel plate 01 facing the front hole B has a lower through-hole having an appropriate height. 13a is drilled, and further, the back surface of the sheet pile steel plate 01 is excavated deeper and lower than the bottom surface 02 of the water channel from the position of the lower through hole 13a to form a back hole A1 (FIG. 13).

支持ブロック体12は、前記の下方透孔13aを跨ぎ、且つ後方脚部121の前面を埋設矢板鋼板01aの裏面に当接するように設置する。支持ブロック体12の設置後に縦孔部123からコンクリートを流し込んで、埋設矢板鋼板01aと支持ブロック体12との隙間をコンクリートで充たし、埋設矢板鋼板01aと支持ブロック体12の一体化を図る。   The support block body 12 is installed so as to straddle the lower through hole 13a and to make the front surface of the rear leg 121 contact the back surface of the buried sheet pile steel plate 01a. Concrete is poured from the vertical hole portion 123 after the support block body 12 is installed, and the gap between the buried sheet pile steel plate 01a and the support block body 12 is filled with concrete, so that the buried sheet pile steel plate 01a and the support block body 12 are integrated.

支持ブロック体設置工を終了した後、支柱杭10の打ち込みを行う背後杭設置工を行う。この背後杭設置工は、基礎ブロック体11を採用した際と同様に実施し(図14)、支持ブロック体12の後方脚部121が支柱杭10と埋設矢板鋼板01aとの間に介在して、受支持部が構成されるようになる。また埋設矢板鋼板01aと一体化した支持ブロック体12の上面が擁壁板支持部となる。   After finishing the support block body installation work, a back pile installation work for driving the support pile 10 is performed. This back pile installation work is carried out in the same manner as when the foundation block body 11 is adopted (FIG. 14), and the rear leg 121 of the support block body 12 is interposed between the pillar pile 10 and the buried sheet pile steel plate 01a. The receiving support part is configured. Moreover, the upper surface of the support block body 12 integrated with the buried sheet pile steel plate 01a becomes the retaining wall plate support portion.

尚背面穴A1及び前面穴Bは適宜埋め戻すが、残余空間が存在したとしても、後述する底面整備工又はコンクリートの充填打設工に際してコンクリートが流れ込み、矢板鋼板01と支持ブロック体12との一体化がなされる。   The back hole A1 and the front hole B are appropriately refilled, but even if there is a remaining space, the concrete flows into the bottom surface maintenance work or the concrete filling and placing work described later, and the sheet pile steel plate 01 and the support block body 12 are integrated. Is made.

前記した基礎ブロック体設置工及び支持ブロック体設置工に替えて、コンクリート打設で受支持部及び擁壁板支持部を備えた基礎部分を構築する基礎構築工を採用することもできる。   In place of the above-described foundation block body installation work and support block body installation work, a foundation construction work for constructing a foundation portion having a receiving support portion and a retaining wall plate support portion by concrete placement may be employed.

基礎構築工は、支持体ブロック体設置工と同様に、前面穴B1を掘削形成し、前面穴B1の箇所から矢板鋼板01に下方透孔13bを穿設し、当該下方透孔13bの箇所から矢板鋼板01裏面を用水路底面以下まで掘削して背面穴A2を形成する。   Like the support block body installation work, the foundation construction work excavates and forms the front hole B1, drills the lower through hole 13b in the sheet pile steel plate 01 from the position of the front hole B1, and starts from the position of the lower through hole 13b. The back surface of the sheet pile steel plate 01 is excavated to the bottom of the irrigation channel to form a back hole A2.

所定の掘削を終えると、ケーシング設置、支柱杭10の打ち込み設置を行う背後杭設置工、矢板鋼板01の前面の水路底面の基礎用整備、型枠パネル(表面擁壁板の最下方部分を兼ねる)7cの配置、コンクリートを充填する基礎打設の順で行う。   After the predetermined excavation, the installation of the casing, the back pile installation work for driving the column piles 10, the maintenance of the foundation of the bottom of the water channel in front of the sheet pile steel plate 01, the formwork panel (also serves as the lowermost part of the surface retaining wall plate) ) 7c is arranged in the order of foundation placement to fill concrete.

ケーシング設置は、例えば下方開口コの字状板の上方ケーシング14aと上方開口コの字状板の下方ケーシング14bとを組み合わせて形成した分割ケーシングを使用するもので、下方透孔13bから差し入れて背面穴A2で下方に拡張させる。   The casing installation uses, for example, a split casing formed by combining the upper casing 14a of the lower opening U-shaped plate and the lower casing 14b of the upper opening U-shaped plate. Expand downward in hole A2.

ケーシング設置後に背後杭設置工を行う。支柱杭10は前記分割ケーシング14a,14bの奥方に当接して打ち込むのが望ましいが、非当接状態であっても支柱杭10の一部が背面穴A2内に露出していれば良い。この分割ケーシング14a,14bの設置は地盤が崩落し易い場合に適用するものであり、必ずしもケーシング設置を行わなくとも良い。   Back pile installation work is performed after casing installation. It is desirable that the strut pile 10 is driven in contact with the back of the divided casings 14a and 14b. However, even if the strut pile 10 is in a non-contact state, a part of the strut pile 10 only needs to be exposed in the back hole A2. The installation of the divided casings 14a and 14b is applied when the ground easily collapses, and the casing installation is not necessarily performed.

水路底面の基礎用整備は、前記の前面穴B1の掘削と同時進行で矢板鋼板01の前面に添って基礎を構築する範囲全長に掘削溝を形成し、当該掘削溝に砕石20を敷設すると共に、矢板鋼板01の前面に添って足鋼材21若しくは鉄筋を配置する。   In the maintenance of the foundation on the bottom of the water channel, the excavation groove is formed in the entire length of the foundation construction along the front surface of the sheet pile steel plate 01 simultaneously with the excavation of the front hole B1, and the crushed stone 20 is laid in the excavation groove. The foot steel material 21 or the reinforcing bar is arranged along the front surface of the sheet pile steel plate 01.

型枠パネル7cは、パネル板76の背面に適宜長さの支持材77を突設したもので、パネル板76は、新規に構築される擁壁の表面となるもので、後述するパネル設置工に使用する擁壁板7と同一の材質とすることが好ましく、金属板やプラスチック板でも良いが、コンクリートパネルが最適である。更にこのパネル板76には、連結部材5cの連結用の連結孔78を穿設してなる。   The formwork panel 7c has a support member 77 of an appropriate length protruding from the back surface of the panel plate 76. The panel plate 76 serves as a surface of a newly constructed retaining wall. It is preferable to use the same material as the retaining wall plate 7 used in the above, and a metal plate or a plastic plate may be used, but a concrete panel is optimal. Further, the panel plate 76 is formed with a connecting hole 78 for connecting the connecting member 5c.

型枠パネル設置は、予め背面穴A2の空間を通して支柱杭10に連結部材5cを連結しておき、パネル板76を足鋼材21の上に載置すると共に、連結部材5cを連結孔78に挿通し、固定ナット(表裏配置)56でパネル板76を固定する。このパネル板76の固定時に支持材77は下方透孔13bを通り上下ケーシング14a,14bで囲繞された空間内に位置することになる。   For the formwork panel installation, the connecting member 5c is connected to the column pile 10 in advance through the space of the back hole A2, the panel plate 76 is placed on the foot steel member 21, and the connecting member 5c is inserted into the connecting hole 78. Then, the panel plate 76 is fixed by a fixing nut (front and back arrangement) 56. When the panel plate 76 is fixed, the support member 77 passes through the lower through hole 13b and is located in a space surrounded by the upper and lower casings 14a and 14b.

次に型枠パネル(最下方擁壁板)7cの背後にコンクリート8aを充填打設すると、上下ケーシング14a,14b、及び支柱杭10、及び連結部材5c、及び支持材77を含む型枠パネル(最下方擁壁板)7cが一体となった基礎Yが構築されることになる。   Next, when concrete 8a is filled and placed behind the formwork panel (lowermost retaining wall plate) 7c, the formwork panel (including the upper and lower casings 14a and 14b, the column pile 10, the connecting member 5c, and the support member 77). The foundation Y in which the lowermost retaining wall plate) 7c is integrated is constructed.

前記の支持ブロック体設置工及び基礎構築工を行った場合は、次に連結部材配置工、パネル設置工、充填打設工を行い、前記以外は受杭打込工を行い、その後に連結部材配置工、パネル設置工、充填打設工を行う。   When the support block body installation work and the foundation construction work are performed, the connecting member placement work, the panel setting work, and the filling placement work are performed, and the receiving pile driving work is performed except the above, and then the connection member. Arrangement work, panel installation work, filling placement work.

前記した支持ブロック体設置工や基礎構築工のように擁壁板支持部の構築を行わない場合に、支持杭2の打ち込み(受杭打込工)による擁壁板支持部の構築を行う。受杭打込工は、松杭等の腐食耐性を備えた支持杭2を矢板鋼板01の表面(用水路側)に添って用水路底面02に打ち込んでなるもので、杭径及び杭長並びに杭間隔は、新設される表面擁壁Xの荷重を考慮して定められる。また打ち込みの程度は、支持杭2の頂部が用水路底面02の高さと一致させるが、後述する底面整備工を実施する場合は、底面整備工による捨てコンクリート面6の厚さ分上方に突出させても良い。尚支持ブロック体設置工を行った箇所は省略することができる。   When the retaining wall plate support portion is not constructed as in the above-described support block body installation work or foundation construction work, the retaining wall plate support portion is constructed by driving the support pile 2 (receiving pile placing work). The receiving pile driving work is made by driving the support pile 2 having corrosion resistance such as pine piles into the bottom face 02 of the irrigation channel along the surface (the irrigation channel side) of the sheet pile steel plate 01, and the pile diameter, the pile length, and the pile spacing. Is determined in consideration of the load of the newly installed surface retaining wall X. Moreover, the level of the driving pile 2 is made to coincide with the height of the bottom surface 02 of the irrigation channel. However, when the bottom surface maintenance work described later is carried out, it is projected upward by the thickness of the discarded concrete surface 6 by the bottom surface maintenance work. Also good. In addition, the place which performed the support block body installation work can be abbreviate | omitted.

連結部材配置工は、最初に支柱杭10を立て込んだ位置で且つ連結部101の高さ位置で実施するもので、連結部材5の支柱杭10との連結構造によっては開削穴Cを形成する。開削穴Cの形成手段は、矢板鋼板01の所定位置に予めマーキングDを表示し、当該箇所の矢板鋼板01を穿孔して連結用透孔3を形成する。次に前記連結用透孔3を通して矢板鋼板01の背後の土中に崩壊防止用パイプ4を打ち込み、更に当該パイプ4内の土壌を掻き出して除去し、支柱杭10の連結部101を露出させる開削穴Cを形成する。   The connecting member placement work is performed at the position where the column pile 10 is first stood and at the height position of the connecting portion 101, and the cut hole C is formed depending on the connection structure of the connecting member 5 to the column pile 10. The means for forming the excavation hole C displays the marking D at a predetermined position of the sheet pile steel plate 01 in advance, and drills the sheet pile steel plate 01 at the corresponding portion to form the connecting through hole 3. Next, the collapse prevention pipe 4 is driven into the soil behind the sheet pile steel plate 01 through the connection through hole 3, and the soil in the pipe 4 is scraped and removed to expose the connection portion 101 of the column pile 10. Hole C is formed.

尚開削穴Cの形成位置は、矢板鋼板01の凹凸面のいずれでも良いが、できるだけバランスが良く、且つ上下に配置するが、採用する連結部材5の連結構造や、擁壁板7の連結金具71の構造に対応して適宜定めるものである。   The cut-off hole C may be formed on any of the concave and convex surfaces of the sheet pile steel plate 01, but the balance is as good as possible and is arranged vertically, but the connection structure of the connection member 5 to be used and the connection bracket of the retaining wall plate 7 are used. It is determined as appropriate corresponding to the structure 71.

次に連結部材5を開削穴Cに通して、支柱杭10の連結部101に連結する。使用する連結部材5は、相応の引っ張り強度を備えた部材であり、例えば図3に示したように棒状本体51の先端に軸方向と直交する縦長矩形状の係止突起52を設け、基端に擁壁板装着用の螺条部53を設けたものである。この連結部材5を開削穴Cに差し込み、支柱杭10の連結部(縦長矩形孔)101に挿入して半回転させると連結部材5は抜け止め装着され、螺条部53が矢板鋼板01の表面側に露出させてなるものである。   Next, the connecting member 5 is passed through the cut hole C and connected to the connecting portion 101 of the column pile 10. The connecting member 5 to be used is a member having an appropriate tensile strength. For example, as shown in FIG. 3, a vertically long rectangular locking projection 52 orthogonal to the axial direction is provided at the distal end of the rod-shaped main body 51, and the proximal end Is provided with a threaded portion 53 for attaching a retaining wall plate. When this connecting member 5 is inserted into the cut hole C, inserted into the connecting portion (vertically long rectangular hole) 101 of the column pile 10 and half-rotated, the connecting member 5 is attached to prevent it from coming off, and the threaded portion 53 is attached to the surface of the sheet pile steel plate 01. It is exposed to the side.

尚この連結部材配置工は、前記の連結部材5に特定されるものでは無く、支柱杭10に設けた連結部101の構造と対応する部材で、且つ後述する擁壁板7に連結可能な構成であれば良く、他の例としては図7に示すように連結部101aを雌螺孔部とし連結部材5aを螺子棒としても良い。更には単に連結部101aを円形孔とし、連結部材としてアンカー構造を採用しても良いし、又は連結部材をひも体とし、予め支柱杭10に固着(ワイヤーの溶着や結縛)しておき、開削穴Cから引き出すようにした構造でも良い。また土壌中を進行可能な例えば螺旋杭形状のような連結部材を採用すると開削穴Cを形成する必要もない。   In addition, this connection member arrangement | positioning work is not specified to the said connection member 5, It is a member corresponding to the structure of the connection part 101 provided in the support | pillar pile 10, and the structure which can be connected with the retaining wall board 7 mentioned later As another example, as shown in FIG. 7, the connecting portion 101a may be a female screw hole portion and the connecting member 5a may be a screw rod. Furthermore, the connecting portion 101a is simply a circular hole, an anchor structure may be adopted as the connecting member, or the connecting member is a string, and is fixed to the pillar pile 10 in advance (welding or binding of wires), A structure may be adopted in which it is pulled out from the cut hole C. Further, when a connecting member such as a spiral pile shape capable of traveling in the soil is employed, it is not necessary to form the excavation hole C.

更に図14に例示するように先端に係止鉤部54を設けた連結部材5bを採用し、矢板鋼板01の表面側に横架される横杆55を前記係止鉤部54で支持(連結)し、この横杆55をパネル設置工に際しての擁壁板7bの装着対象とするものである。   Further, as illustrated in FIG. 14, a connecting member 5 b provided with a locking hook portion 54 at the tip is adopted, and a horizontal rod 55 laid on the surface side of the sheet pile steel plate 01 is supported (connected) by the locking hook portion 54. This horizontal bar 55 is to be mounted on the retaining wall plate 7b during panel installation work.

底面整備工は、受杭打込工を採用した際に、次のパネル設置工における擁壁板7の設置を正確に且つ容易に行うために実施するものである。この底面整備工は、用水路底面02に簡易舗装のような捨てコンクリート面6を形成し、又はコンクリート板を敷くことで実施する。前記捨てコンクリート面6は、支持ブロック体12の上面や支持杭2の頂面と一致させても良いし、またこれらを覆うように形成しても良い。尚の底面整備工は受杭打込工を採用した場合に必ず実施しなければならないものではなく、省略することもできる。   The bottom surface maintenance work is carried out in order to accurately and easily install the retaining wall plate 7 in the next panel installation work when the receiving pile driving work is adopted. This bottom surface maintenance work is carried out by forming a discarded concrete surface 6 such as a simple pavement on the irrigation channel bottom surface 02 or laying a concrete plate. The said abandoned concrete surface 6 may be made to correspond with the upper surface of the support block body 12, and the top surface of the support pile 2, and may be formed so that these may be covered. The bottom surface maintenance work is not necessarily performed when the receiving pile driving work is adopted, and can be omitted.

パネル設置工は、表面擁壁X(X1)の表面被覆であり表面擁壁Xの型枠となる擁壁板7(7a,7b)を所定の位置に設置するもので、擁壁板7は、金属板やプラスチック板でも良いが、好ましくはコンクリートパネルを使用する。   The panel installation work is to install the retaining wall plate 7 (7a, 7b), which is the surface coating of the surface retaining wall X (X1) and forms the form of the surface retaining wall X, at a predetermined position. A metal plate or a plastic plate may be used, but a concrete panel is preferably used.

前記擁壁板7には予め連結部材5(5a,5bその他の任意構造)と対応する連結構造、例えば背面に突設した連結金具71等を備えさせてなり、また下端縁はL状に突設した載置部72を設けたもので、前記連結金具71と連結部材5の基端側とを連結すると共に、擁壁板7を矢板鋼板01の表面を覆うように、隣接する擁壁板7を連続させて捨てコンクリート面6上又は支持ブロック体12上或いは基礎Y上に配置していくものである。   The retaining wall plate 7 is preliminarily provided with a connecting structure corresponding to the connecting member 5 (5a, 5b and other arbitrary structures), for example, a connecting metal fitting 71 projecting on the back surface, and the lower end edge protrudes in an L shape. An installed retaining portion 72 is provided, which connects the connecting fitting 71 and the base end side of the connecting member 5, and adjoins the retaining wall plate 7 so as to cover the surface of the sheet pile steel plate 01 with the retaining wall plate 7. 7 is continuously disposed on the concrete surface 6 or on the support block body 12 or on the foundation Y.

即ち受杭打込工を行っている場合には、支持杭2で擁壁板7(表面擁壁X)の荷重を支えるようにし、支持ブロック体設置工を行っている場合には、擁壁板7を前記支持ブロック体12上に位置させることで擁壁板7(表面擁壁X)の荷重を支えるようにし、また基礎構築工を実施した場合には、基礎Y上に構築される擁壁板7(表面擁壁X1)の荷重を支えるものである。   That is, when the receiving pile driving work is performed, the supporting pile 2 supports the load of the retaining wall plate 7 (surface retaining wall X), and when the supporting block body installation work is performed, the retaining wall The plate 7 is positioned on the support block body 12 so as to support the load of the retaining wall plate 7 (surface retaining wall X), and when the foundation construction work is performed, the foundation constructed on the foundation Y is supported. It supports the load of the wall plate 7 (surface retaining wall X1).

またパネル設置工に際しては、前記のとおり擁壁板7の背後に連結金具71を備えたものでは無く、図8に示すように連結部材5(5a)と対応する位置に連結孔73を穿設した擁壁板7aと、擁壁板7aを連結部材5(5a)に装着する適宜な外装連結金具74を採用しても良い。このような組み合わせを採用すると擁壁板7aの設置作業が擁壁板用水路側から作業することができる。   When installing the panel, as described above, the connecting metal plate 71 is not provided behind the retaining wall plate 7, but a connecting hole 73 is formed at a position corresponding to the connecting member 5 (5a) as shown in FIG. The retaining wall plate 7a and the appropriate exterior coupling fitting 74 for attaching the retaining wall plate 7a to the coupling member 5 (5a) may be employed. When such a combination is employed, the installation work of the retaining wall plate 7a can be performed from the retaining wall plate water channel side.

更に図14に例示した通り横杆55を採用した場合には、擁壁板7bを横杆55に掛け止めその他の連結手段を備えた連結部75を備えておくと、擁壁板7bの壁面方向(横方向)における取付位置を任意に設定できる。   Further, when the horizontal bar 55 is employed as illustrated in FIG. 14, if the retaining wall plate 7 b is hooked on the horizontal wall 55 and provided with a connecting portion 75 having other connecting means, the wall surface of the retaining wall plate 7 b is provided. The mounting position in the direction (lateral direction) can be set arbitrarily.

コンクリートの充填打設工は、矢板鋼板01の表面に配置された擁壁板7(7a,7b)の背後(矢板鋼板01との間隙)にコンクリート(セメント系充填材)8を充填打設するものである。更に擁壁板7(7a,7b)の背後への充填打設に引き続き、擁壁板7頂部と既存用水路の笠木部04との間を塞ぐ上部パネル(コンクリート板)9を配置すると共に、当該上部パネル9の背面にも充填コンクリート8を充填打設する。   In the concrete filling and placing work, concrete (cement-based filler) 8 is filled and placed behind the retaining wall plates 7 (7a, 7b) disposed on the surface of the sheet pile steel plate 01 (a gap with the sheet pile steel plate 01). Is. Furthermore, following the filling and placing behind the retaining wall plate 7 (7a, 7b), an upper panel (concrete plate) 9 is arranged to close the space between the top of the retaining wall plate 7 and the headboard portion 04 of the existing water channel, and Filling concrete 8 is filled and placed also on the back surface of the upper panel 9.

而してコンクリートの固化によって、連結部材5(5a,5b,5c)で支柱杭10と擁壁板7(7a,7b)が連結され、矢板鋼板01と支柱杭10と擁壁板7(7a,7b)と充填コンクリート8(基礎のコンクリート8aも含む)が一体になった新規の表面擁壁X(X1)が構築され、腐食した矢板鋼板で構成されていた用水路の補修が実現するものである。   Thus, due to the solidification of the concrete, the column pile 10 and the retaining wall plate 7 (7a, 7b) are coupled by the coupling member 5 (5a, 5b, 5c), and the sheet pile steel plate 01, the column pile 10 and the retaining wall plate 7 (7a). 7b) and a new surface retaining wall X (X1) in which the filled concrete 8 (including the basic concrete 8a) is integrated, and the repair of the irrigation channel composed of corroded sheet pile steel is realized. is there.

特に前記表面擁壁X(X1)は、擁壁板支持部(支持杭2、支持ブロック体12、基礎Y)によってその荷重を支えられ、また腐食進行が遅い埋設矢板鋼板01aと一体化して自重による沈下が防止されることになり、更に背面土圧に対しては、笠木04と受支持部(基礎ブロック体11、支持ブロック体12、基礎Y)を介した埋設矢板鋼板01aで支柱杭10が支えられ、表面擁壁X(X1)が連結部材5(5a,・・)で前記支柱杭10と連結されることにより既存の矢板鋼板01からの剥離が防止されるものである(図6,図12,図15、図20)。またコンクリートの防食効果により、矢板鋼板01の腐食進行が抑えられ、開削穴Cを形成した場合には、開削穴C内もコンクリートで満たされ、連結部材5(5a・・)の防食もなされる。   In particular, the surface retaining wall X (X1) is supported by the retaining wall plate support (support pile 2, support block body 12, foundation Y), and is integrated with the buried sheet pile steel plate 01a, which is slow in corrosion progress, and has its own weight. In addition, against the backside earth pressure, the pile pile 10 is formed by the buried sheet pile steel plate 01a through the headboard 04 and the receiving support (base block body 11, support block body 12, foundation Y). Is supported, and the surface retaining wall X (X1) is connected to the pillar pile 10 by the connecting member 5 (5a,...), Thereby preventing peeling from the existing sheet pile steel plate 01 (FIG. 6). 12, FIG. 15, FIG. 20). Further, due to the anticorrosive effect of the concrete, the progress of the corrosion of the sheet pile steel plate 01 is suppressed, and when the cut hole C is formed, the cut hole C is also filled with concrete, and the connecting member 5 (5a ··) is also protected from corrosion. .

10 支柱杭
101,101a 連結部
11 基礎ブロック体(受支持部)
12 支持ブロック体
121 後方脚部(受支持部)
122 前方脚部
123 縦孔部
13,13a,13b 下方透孔
14a,14b 分割ケーシング
2 支持杭(擁壁板支持部)
20 砕石
21 足鋼材
3 連結用透孔
4 崩壊防止用パイプ
5,5a,5b,5c 連結部材
51 棒状本体
52 係止突起
53 螺条部
54 係止鉤部
55 横杆
56 固定ナット
6 捨てコンクリート面
7,7a,7b 擁壁板
7c 型枠パネル(最下方擁壁板)
71 連結金具72 載置部73,78 連結孔74 外装連結金具75 連結部76 パネル板77 支持材8,8a コンクリート(セメント系充填材) 71 Connecting part 72 Mounting part 73,78 Connecting hole 74 Exterior connecting part 75 Connecting part 76 Panel plate 77 Support material 8,8a Concrete (cement-based filler)
9 上部パネルA,A1,A2 背面穴B,B1 前面穴C 開削穴D マーキングX,X1 表面擁壁Y 基礎(受支持部、擁壁板支持部) 9 Top panels A, A1, A2 Back holes B, B1 Front holes C Drilling holes D Markings X, X1 Surface retaining wall Y Foundation (retaining wall support, retaining wall plate support)
01 矢板鋼板01a 埋設矢板鋼板02 地盤(用水路底面) 01 Sheet pile steel plate 01a Buried sheet pile steel plate 02 Ground (bottom of irrigation canal)
03 水路04 笠木部05 切梁部材10 pillar pile 101, 101a connection part 11 foundation block body (receiving support part) 03 Waterway 04 Kasagibe 05 Beam member 10 pillar pile 101, 101a connection part 11 foundation block body (receiving support part)
12 Support block body 121 Back leg part (receiving support part) 12 Support block body 121 Back leg part (receiving support part)
122 Front leg portion 123 Vertical hole portions 13, 13a, 13b Lower through holes 14a, 14b Split casing 2 Support pile (retaining wall plate support portion) 122 Front leg portion 123 Vertical hole portions 13, 13a, 13b Lower through holes 14a, 14b Split casing 2 Support pile (retaining wall plate support portion)
20 Crushed stone 21 Foot material 3 Connecting through hole 4 Collapse prevention pipes 5, 5 a, 5 b, 5 c Connecting member 51 Bar-shaped main body 52 Locking protrusion 53 Threaded portion 54 Locking flange portion 55 Horizontal anchor 56 Fixed nut 6 Abandoned concrete surface 7, 7a, 7b Retaining wall plate 7c Formwork panel (lowermost retaining wall plate) 20 Crushed stone 21 Foot material 3 Connecting through hole 4 Collapse prevention pipes 5, 5 a, 5 b, 5 c Connecting member 51 Bar-shaped main body 52 Locking protrusion 53 Threaded portion 54 Locking flange portion 55 Horizontal anchor 56 Fixed nut 6 Abandoned concrete surface 7, 7a, 7b Retaining wall plate 7c Formwork panel (lowermost retaining wall plate)
71 Connecting bracket 72 Mounting portion 73, 78 Connecting hole 74 Exterior connecting bracket 75 Connecting portion 76 Panel plate 77 Support material 8, 8a Concrete (cement-based filler) 71 Connecting bracket 72 Mounting portion 73, 78 Connecting hole 74 Exterior connecting bracket 75 Connecting portion 76 Panel plate 77 Support material 8, 8a Concrete (cement-based filler)
9 Upper panel A, A1, A2 Back hole B, B1 Front hole C Cut hole D Marking X, X1 Surface retaining wall Y Foundation (receiving support part, retaining wall plate support part) 9 Upper panel A, A1, A2 Back hole B, B1 Front hole C Cut hole D Marking X, X1 Surface retaining wall Y Foundation (receiving support part, retaining wall plate support part)
01 sheet pile steel sheet 01a buried sheet pile steel sheet 02 ground (bottom of the canal) 01 sheet pile steel sheet 01a buried sheet pile steel sheet 02 ground (bottom of the canal)
03 Waterway 04 Kasagi part 05 Beam member 03 Waterway 04 Kasagi part 05 Beam member

Claims (15)

  1. 矢板鋼板で擁壁を形成した既存用水路の補修工法であって、既存擁壁背後に適宜間隔で支柱杭を打ち込み、前記各支柱杭と対応する位置の既存矢板鋼板に連結用透孔を穿ち、前記連結用透孔を通して適宜な連結部材を支柱杭に連結し、連結用透孔から突出する連結部材と矢板鋼板表面側を覆うように配置した擁壁板とを適宜手段で連結し、連結配置した擁壁板の背後に適宜な充填材を充填して表面擁壁を構築してなることを特徴とする既存用水路の補修工法。   It is a repair method for an existing water channel in which a retaining wall is formed with a sheet pile steel plate, and a pillar pile is driven at an appropriate interval behind the existing retaining wall, and a through hole for connection is made in the existing sheet pile steel plate at a position corresponding to each pillar pile, An appropriate connecting member is connected to the pillar pile through the connecting through hole, and the connecting member protruding from the connecting through hole and the retaining wall plate arranged so as to cover the sheet steel plate surface side are appropriately connected and connected. A method for repairing an existing water channel, characterized in that a surface retaining wall is constructed by filling an appropriate filler behind the retaining wall plate.
  2. 支柱杭を、既存用水路に設けられている笠木部に当接して打ち込んでなる請求項1記載の既存用水路の補修工法。   The repair method for the existing water channel according to claim 1, wherein the pillar pile is driven in contact with a headboard portion provided in the existing water channel.
  3. 既存用水路の底方における矢板鋼板に下方透孔を設け、当該下方透孔箇所から矢板鋼板裏面を用水路底面以下まで掘削して、当該背面穴内に適宜な受支持部を構築し、前記受支持部を介して埋設矢板鋼板部分に支柱杭負荷を負担させる請求項1又は2記載の既存用水路の補修工法。   The sheet pile steel plate at the bottom of the existing water channel is provided with a lower through hole, the sheet pile steel plate back surface is excavated from the lower hole location to the bottom of the channel, and an appropriate receiving support portion is constructed in the rear hole. The repair method of the existing waterway of Claim 1 or 2 which bears a support | pillar pile load to an embedded sheet pile steel plate part via.
  4. 受支持部を背面穴内に設置する基礎ブロック体としてなる請求項3記載の既存用水路の補修工法。   The repair method of the existing waterway of Claim 3 which becomes a foundation block body which installs a receiving support part in a back surface hole.
  5. 下方透孔箇所の矢板鋼板表面側も掘削し、下方開口コの字に形成した支持ブロック体を、当該下方透孔を跨いで設置して、当該支持ブロック体が受支持部になると共に、擁壁板支持部にもなる請求項3記載の既存用水路の補修工法。   The bottom side of the sheet pile steel sheet is also excavated, and a support block body formed in a U-shaped lower opening is installed across the lower through hole so that the support block body becomes a receiving support part, The repair method of the existing waterway of Claim 3 used also as a wall-plate support part.
  6. 受支持部を背面穴内に打設したコンクリートで形成してなる請求項3記載の既存用水路の補修工法。   The method for repairing an existing waterway according to claim 3, wherein the receiving support part is made of concrete cast in the back hole.
  7. 背面穴に突出する連結突部を備えたパネルを下方透孔前に配置し、パネル背面及び背面穴内にコンクリートを打設して、受支持部及び擁壁板支持部を構築してなる請求項6記載の既存用水路の補修工法。   A panel having a connecting projection protruding into the back hole is disposed in front of the lower through hole, and concrete is placed in the back and back holes of the panel to construct a receiving support portion and a retaining wall plate support portion. Repair method for existing waterways as described in 6.
  8. 前記支柱杭に連結した連結部材とパネルとを連結し、パネルを最下方擁壁板としてなる請求項7記載の既存用水路の補修工法。   The repair method of the existing waterway of Claim 7 which connects the connection member and panel which were connected with the said support | pillar pile, and uses a panel as a lowermost retaining wall board.
  9. 擁壁板連結配置前に矢板鋼板の表面に添って用水路底面に適宜な支持杭を適宜間隔で打ち込んで擁壁板支持部としてなる請求項1乃至4及び6記載の何れかの既存用水路の補修工法。   The repair of the existing water channel according to any one of claims 1 to 4 and 6, wherein an appropriate support pile is driven into the bottom surface of the water channel along the surface of the sheet pile steel plate at appropriate intervals before the retaining wall plate coupling arrangement. Construction method.
  10. 充填材がセメント系充填材である請求項1乃至9記載の何れかの既存用水路の補修工法。 The repair method for an existing water channel according to any one of claims 1 to 9, wherein the filler is a cement-based filler.
  11. 擁壁板をコンクリートパネルとしてなる請求項1乃至10記載の何れかの既存用水路の補修工法。 The method for repairing an existing water channel according to any one of claims 1 to 10, wherein the retaining wall plate is a concrete panel.
  12. 擁壁板の背後への充填材の充填に引き続き、擁壁板頂部と既存用水路の笠木部との間を塞ぐ上部パネルを配置すると共に、当該上部パネルの背面にも充填材を充填してなる請求項1乃至11記載の何れかの既存用水路の補修工法。   Following the filling of the filling material behind the retaining wall plate, an upper panel that closes the space between the top of the retaining wall plate and the headboard portion of the existing water channel is arranged, and the back surface of the upper panel is filled with the filling material. The repair method of the existing waterway in any one of Claims 1 thru | or 11.
  13. 連結部材を支柱杭に連結する際に、連結用透孔から支柱杭までの間の土壌を除去してなる請求項1乃至12記載の何れかの既存用水路の補修工法。   The method for repairing an existing water channel according to any one of claims 1 to 12, wherein when the connecting member is connected to the support pile, the soil between the connecting through hole and the support pile is removed.
  14. 既存矢板鋼板に穿った連結用透孔内に、崩壊防止用パイプを打ち込み、当該パイプ内の土壌を除去して開削孔を形成してなる請求項13の既存用水路の補修工法。   14. The repair method for an existing water channel according to claim 13, wherein a pipe for preventing collapse is driven into a through hole for connection drilled in an existing sheet pile steel sheet, and a ground hole is formed by removing soil in the pipe.
  15. 連結部材で矢板鋼板表面側に横杆を支持し、前記横杆に擁壁板を装着してなる請求項1乃至14記載の何れかの既存用水路の補修工法。   The method for repairing an existing water channel according to any one of claims 1 to 14, wherein the connecting member supports a horizontal bar on the sheet pile steel plate surface side, and a retaining wall plate is mounted on the horizontal bar.
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CN109281298A (en) * 2018-10-22 2019-01-29 浙江水利水电学院 A kind of cast-in-place irrigation canal construction method
CN109281298B (en) * 2018-10-22 2020-07-03 浙江水利水电学院 Cast-in-situ irrigation channel construction method

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JP2014088753A (en) * 2012-10-04 2014-05-15 Meiwa Industries Ltd Repair method for existing irrigation canal
JP2014169596A (en) * 2013-03-05 2014-09-18 Meiwa Industries Ltd Repair method for existing irrigation channel
JP2014211068A (en) * 2013-04-22 2014-11-13 藤村ヒューム管株式会社 Coupling jig, coupling wall coupled by the same, and repair method for steel sheet pile using the same

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JP2010196271A (en) * 2009-02-23 2010-09-09 Koken Sangyo Kk Method for reinforcing existing revetment
JP2014088753A (en) * 2012-10-04 2014-05-15 Meiwa Industries Ltd Repair method for existing irrigation canal
JP2014169596A (en) * 2013-03-05 2014-09-18 Meiwa Industries Ltd Repair method for existing irrigation channel
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Publication number Priority date Publication date Assignee Title
CN109281298A (en) * 2018-10-22 2019-01-29 浙江水利水电学院 A kind of cast-in-place irrigation canal construction method
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