JP4401342B2

JP4401342B2 - Open channel rehabilitation member and open channel rehabilitation method using open channel rehabilitation member

Info

Publication number: JP4401342B2
Application number: JP2005287410A
Authority: JP
Inventors: 俊司東
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2005-09-30
Filing date: 2005-09-30
Publication date: 2010-01-20
Anticipated expiration: 2025-09-30
Also published as: JP2007100299A

Description

この発明は、開水路更生部材および開水路更生部材を用いた開水路の更生方法に関するものである。 The present invention relates to an open channel rehabilitation member and an open channel rehabilitation method using the open channel renewal member.

農業用水路、導水路、余水路などの開水路は、使用により老朽化した場合、浸食やひび割れによって漏水や浸水が生じる。このため、老朽化した開水路については、補修・改修する必要がある。 When an open channel such as an agricultural channel, a conduit, and a spillway becomes obsolete due to use, water leakage or inundation occurs due to erosion or cracking. For this reason, it is necessary to repair and renovate the old open channel.

通常、開水路を補修する場合、不良部分を除去し、その除去部分に新たにコンクリートを打ち直すことが行なわれているが、このような補修法では、既設コンクリートの不良部分の削り、搬出、新コンクリートの打設といった作業が必要となり、工期が長期化するという問題がある。 Usually, when repairing an open channel, the defective part is removed, and concrete is re-launched in the removed part. However, with such a repair method, the defective part of the existing concrete is scraped, removed, and renewed. There is a problem that work such as placing concrete is required and the construction period is prolonged.

このため、既設の開水路の表面に固定部材をアンカーボルトを介して固定し、固定部材を利用してＦＲＰ板を開水路の全面に張設した後、ＦＲＰ板の背面と既設の開水路の表面との間にモルタルを打設して開水路を更生する工法が提案されている（例えば、特許文献１，２参照）。
特公平６−１９１３２号公報特開２００５−５４４７４号公報 For this reason, after fixing a fixing member to the surface of an existing open channel with an anchor bolt and extending the FRP plate over the entire surface of the open channel using the fixing member, the rear surface of the FRP plate and the existing open channel A construction method in which a mortar is placed between the surface and the open channel is rehabilitated has been proposed (see, for example, Patent Documents 1 and 2).
Japanese Patent Publication No. 6-19132 JP 2005-54474 A

しかしながら、前述した工法において、既設の開水路の内面とＦＲＰ板の外面との空間にモルタルを充填するには、その空間の上方開口部を通して行なう必要がある。この場合、上方開口部は、開放されているため、設定圧力で供給されたモルタルが上方開口部から漏出しないように、左右の上方開口部を設定圧力のモルタルに抗して密封する必要があり、作業が煩雑になるという欠点がある。また、例えば、左側の上方開口部からモルタルを供給した場合、モルタルは、左ＦＲＰ板の外面と既設の開水路の左側面との空間を経て底ＦＲＰ板の外面と既設の開水路の底面の空間に達し、その後、右ＦＲＰ板の外面と既設の開水路の右側面との空間に充填されることになるため、流動抵抗が大きくなる。このため、対向する上方開口部まで確実にモルタルが到達するように、モルタルの供給圧力は大きくなりがちとなる。したがって、既設の開水路の左右側面と左右のＦＲＰ板の外面との間に形成される空間の上方開口部をより高い圧力に対抗できるように密封する必要があり、コストがかさむとともに、工期が長期化するという問題がある。 However, in the construction method described above, in order to fill the mortar into the space between the inner surface of the existing open channel and the outer surface of the FRP plate, it is necessary to carry out through the upper opening of the space. In this case, since the upper opening is open, it is necessary to seal the left and right upper openings against the mortar at the set pressure so that the mortar supplied at the set pressure does not leak from the upper opening. There is a disadvantage that the work becomes complicated. Further, for example, when mortar is supplied from the upper opening on the left side, the mortar passes through the space between the outer surface of the left FRP plate and the left side surface of the existing open channel, and the bottom surface of the bottom FRP plate and the existing open channel. After reaching the space, the space between the outer surface of the right FRP plate and the right side surface of the existing open channel is filled, so that the flow resistance increases. For this reason, the supply pressure of the mortar tends to increase so that the mortar surely reaches the upper opening facing the mortar. Therefore, it is necessary to seal the upper opening of the space formed between the left and right side surfaces of the existing open channel and the outer surfaces of the left and right FRP plates so as to be able to resist higher pressure, which increases costs and increases the work period. There is a problem of prolonged.

本発明は、このような問題点に鑑みてなされたもので、裏込め材を簡単に充填できる開水路更生部材を提供するとともに、裏込め材を簡単に充填できる開水路更生部材を用いて工期を短縮して開水路を更生することができる更生方法を提供するものである。 The present invention has been made in view of such problems, and provides an open channel renewal member that can be easily filled with a backfilling material, and a construction period using the open channel renewal member that can be easily filled with a backfilling material. The rehabilitation method which can shorten open water and rehabilitate an open channel is provided.

本発明の開水路更生部材は、既設の開水路の内面形状に略相似形の外面形状を有し、既設の開水路の内面に流れ方向に沿って順に配設して開水路を更生するために用いられる単位長さの開水路更生部材であって、該開水路更生部材は、多数のガラス繊維の間に含浸されたウレタン樹脂組成物を発泡硬化させて成形された繊維強化発泡樹脂成形体から形成され、底面部と、底面部の左右端縁部に立設された左側面部および右側面部とからなり、左側面部および右側面部の上端面に外端縁から外方に設定長さ突出する上面補強材が設けられる一方、底面部、左側面部および右側面部の一端部近傍の外面にわたって設けられたスペーサに受け金具が固定されるとともに、該受け金具の底面部分に取付穴を形成した複数個の取付金具が該取付穴を底面部の一端縁から外方に突出して位置するように固定され、また、底面部、左側面部および右側面部の他端部の外面にわたって前記受け金具の内面側に重合可能な挿し金具が設けられるとともに、受け金具の内面または挿し金具の外面にわたって止水パッキンが設けられ、さらに、既設の開水路に複数の開水路更生部材を配設した際に、裏込め材を充填するためのグラウトホールが設定長さ単位で位置するように、開水路更生部材の底面部、左側面部および右側面部の少なくとも一つにグラウトホールが設けられることを特徴とするものである。 The open channel rehabilitation member of the present invention has an outer surface shape that is substantially similar to the inner surface shape of the existing open channel, and is arranged in order along the flow direction on the inner surface of the existing open channel to renew the open channel. An open channel rehabilitation member having a unit length used for a fiber reinforced foamed resin molded body formed by foaming and curing a urethane resin composition impregnated between a large number of glass fibers. The left side and the right side are erected on the left and right end edges of the bottom part, and project at a set length outward from the outer edge to the upper end surfaces of the left side and the right side. A plurality of support members are fixed to a spacer provided over the outer surface in the vicinity of one end of the bottom surface portion, the left side surface portion, and the right side surface portion while a top surface reinforcing material is provided, and a plurality of mounting holes are formed in the bottom surface portion of the receiving metal fitting Mounting bracket of the mounting hole on the bottom Is fixed so as to protrude outward from one end edge of the base, and an insertion fitting that can be polymerized is provided on the inner surface side of the receiving fitting over the outer surface of the other end portion of the bottom surface portion, the left side surface portion, and the right side surface portion, A water stop packing is provided on the inner surface of the metal fitting or the outer surface of the metal fitting, and when a plurality of open channel renovation members are installed in the existing open channel, the grout hole for filling the backfill material is set to the set length. Grout holes are provided in at least one of the bottom surface portion, the left side surface portion, and the right side surface portion of the open channel renovation member so as to be positioned in units.

本発明によれば、前後の開水路更生部材を受け金具と挿し金具との継手により密封しつつ接続することができる。この場合、設定長さ単位でグラウトホールが位置するように、グラウトホールを設けた開水路更生部材を含む複数の開水路更生部材を接続することにより、設定長さ単位で設けられるグラウトホールに裏込め材のホースなどを接続すれば、裏込め材を開水路更生部材の外面と既設の開水路の内面によって形成される空間に簡単に充填することができる。充填された裏込め材は、上面補強材によってそれ以上の漏出が阻止される。 According to the present invention, the front and rear open channel renewal members can be connected while being sealed by the joint between the receiving metal fitting and the insertion fitting. In this case, by connecting a plurality of open channel renewal members including the open channel renovation member provided with the grout hole so that the grout hole is positioned in the set length unit, the back of the grout hole provided in the set length unit is connected. If a hose or the like of the filling material is connected, the back filling material can be easily filled into the space formed by the outer surface of the open channel renewal member and the inner surface of the existing open channel. The filled backfill material is prevented from further leakage by the top reinforcement.

ここで、グラウトホールの取付位置としては、流動長さが左右に均等化される底面部の幅方向中間部が好ましいが、左右の側面部にそれぞれ１個ずつ設けてもよく、また、施工の制約から、更生区間の一部においては、左右の側面部の一方のみに設けてもよい。 Here, the mounting position of the grout hole is preferably an intermediate portion in the width direction of the bottom portion where the flow length is equalized to the left and right, but one may be provided on each of the left and right side portions, Due to restrictions, in a part of the rehabilitation section, it may be provided only on one of the left and right side portions.

本発明において、前記底面部、左側面部および右側面部の外面にわたって長手方向に間隔をおいて複数本の縦補強桟が設けられるとともに、隣接する縦補強桟間に幅方向および高さ方向に間隔をおいて複数本の横補強桟が設けられると、開水路更生部材を補強することができるため、好ましい。これにより、裏込め材の充填時に撓みの発生を防止することができる。 In the present invention, a plurality of longitudinal reinforcing bars are provided at intervals in the longitudinal direction over the outer surfaces of the bottom surface part, the left side surface part, and the right side surface part, and the space between the adjacent vertical reinforcing bars is spaced in the width direction and the height direction. In this case, it is preferable to provide a plurality of lateral reinforcing bars because the open channel renewal member can be reinforced. Thereby, generation | occurrence | production of a bending at the time of filling of a backfilling material can be prevented.

本発明の開水路更生部材を用いた開水路の更生方法は、請求項１または２記載の開水路更生部材を既設の開水路に配置し、開水路更生部材を既設の開水路に取付金具の取付穴を通してアンカーにより固定した後、新たな開水路更生部材を既設の開水路に配置するとともに、新たな開水路更生部材をその他端面と先に固定した開水路更生部材の一端面とが略当接するように引き寄せ、先に固定した開水路更生部材の受け金具に新たな開水路更生部材の挿し金具を差し込んで継手を形成した後、新たな開水路更生部材を既設の開水路に取付金具の取付穴を通してアンカーにより固定し、以下、グラウトホールが設定長さ単位で位置するように、新たな開水路更生部材を受け金具と挿し金具が継手を形成した状態で順に固定し、次いで、固定された開水路更生部材を支保工を介して支持した後、グラウトホールを通して裏込め材を開水路更生部材の外面と既設の開水路の内面との間に充填することを特徴とするものである。 An open channel rehabilitation method using the open channel renewal member according to the present invention is the arrangement of the open channel renewal member according to claim 1 or 2 in an existing open channel, and the open channel renewal member is attached to the existing open channel. After fixing with an anchor through the mounting hole, a new open channel renovation member is placed in the existing open channel, and the other end surface of the new open channel renewal member and the one end surface of the open channel renovation member fixed earlier are approximately After pulling them so that they come into contact with each other, insert a fitting for the new channel renewal member into the bracket of the channel renewal member fixed earlier, and then form a joint, and then attach the new channel renewal member to the existing channel. Fix with the anchor through the mounting hole, and then fix the new open channel renovation member in order with the fitting and the fitting formed in order so that the grout hole is located in the set length unit, then fixed The After the waterway rehabilitation member supported via 支保 Engineering, is characterized in that the filling between the outer surface and the existing open channel of the inner surface of the open channel retreading member back-filling material through the grout holes.

本発明によれば、既設の開水路に開水路更生部材を受け金具と挿し金具が継手を形成した状態で順にアンカー固定し、開水路更生部材を支保工を介して支持した後、開水路更生部材に設定長さ単位で設けられたグラウトホールに裏込め材のホースなどを接続して裏込め材を供給することにより、開水路更生部材の撓みを抑えつつ開水路更生部材の外面と既設の開水路の内面および上面補強材によって形成される空間に裏込め材を簡単に充填することができるとともに、工期を短縮して開水路を更生することが可能となる。 According to the present invention, an open channel renewal member is received in an existing open channel, and the metal fitting and the insertion fitting are anchored in order in a state where the fitting forms a joint, and the open channel renewal member is supported via a support, and then the open water channel renewal is supported. By connecting the hose of the backfill material to the grout hole provided in the set length unit on the member and supplying the backfill material, the outer surface of the open channel renovation member and the existing surface are suppressed while suppressing the deflection of the open channel renewal member. The backfill material can be easily filled in the space formed by the inner surface of the open channel and the upper surface reinforcing material, and the open channel can be renewed by shortening the construction period.

ここで、グラウトホールは、更生区間の設定長さ単位で設けられることから、単位長さの開水路更生部材が短い場合、例えば、既設の開水路がゆるやかに湾曲している場合には、複数の開水路更生部材に１個の割合で開水路更生部材に設ければよい。一方、既設の開水路が直線である場合には、単位長さの開水路更生部材を長く形成することができ、各開水路更生部材にグラウトホールを設ければよい。 Here, since the grout hole is provided in the set length unit of the rehabilitation section, when the open channel rehabilitation member of the unit length is short, for example, when the existing open water channel is gently curved, What is necessary is just to provide in an open channel renovation member in the ratio of one to the open channel renovation member. On the other hand, when the existing open channel is a straight line, the open channel renewal member having a unit length can be formed long, and a grout hole may be provided in each open channel renewal member.

また、アンカーは、後打ちアンカーであって、ホールインアンカー（メカニカルアンカー）やケミカルアンカーを選択できる。 The anchor is a post-cast anchor, and a hole-in anchor (mechanical anchor) or a chemical anchor can be selected.

本発明において、前記裏込め材が軽量多孔質繊維強化コンクリートであることが好ましい。軽量多孔質繊維強化コンクリートとしては、明興防水株式会社の製造販売に係る商品名：エコセルロ（登録商標）モルタルを挙げることができる。このエコセルロ（登録商標）モルタルは、製紙工場より排出される副産物を利用して加工した繊維質物質（エコセルロ（登録商標））を発泡コンクリートの材料に使用したものであり、繊維が気泡、セメント粒子、水を抱き込み、水を完全に押し出して隙間のない充填が可能となる。すなわち、エコセルロ（登録商標）モルタルを裏込め材として採用するときには、水を外部に押し出して裏込め材を開水路更生部材の外面と開水路の表面との空間に隙間なく充填することができるものとなる。 In the present invention, the backfill material is preferably lightweight porous fiber reinforced concrete. As a lightweight porous fiber reinforced concrete, the brand name which concerns on manufacture and sale of Meiko Waterproof Co., Ltd .: Ecocellulo (trademark) mortar can be mentioned. This Eco-Cellulo (registered trademark) mortar is made of a fiber material (Eco-Cellulo (registered trademark)) processed by using by-products discharged from a paper mill as a material for foamed concrete. Embracing water, completely extruding water and filling without gaps. That is, when Eco-Cellulo (registered trademark) mortar is used as a backfill material, water can be pushed out to fill the space between the outer surface of the open channel renovation member and the surface of the open water channel without any gap. It becomes.

本発明の開水路更生部材は、既設の開水路の内面形状に略相似形の外面形状を有し、既設の開水路の内面に流れ方向に沿って順に配設して開水路を更生するために用いられる単位長さの開水路更生部材であって、該開水路更生部材は、多数のガラス繊維の間に含浸されたウレタン樹脂組成物を発泡硬化させて成形された繊維強化発泡樹脂成形体から形成され、底面部と、底面部の左右端縁部に立設された左側面部および右側面部とからなり、左側面部および右側面部の上端面に外端縁から外方に設定長さ突出する上面補強材が設けられる一方、底面部、左側面部および右側面部の一端部の外面にわたって縦補強桟がその一端面を底面部、左側面部および右側面部の端面から外方に設定長さ突出して設けられるとともに、他端部近傍の外面にわたって縦補強桟が、一端部に設けられた縦補強桟の一端面に対向する他端面を底面部、左側面部および右側面部の端面から内方に設定長さ後退して設けられ、また、底面部の両端部に幅方向に間隔をおいて複数個の下穴が縦横補強桟を貫通して形成され、既設の開水路に複数の開水路更生部材を固定した際に、裏込め材を充填するためのグラウトホールが設定長さ単位で位置するように、開水路更生部材の底面部、左側面部および右側面部の少なくとも一つにグラウトホールが設けられることを特徴とするものである。 The open channel rehabilitation member of the present invention has an outer surface shape that is substantially similar to the inner surface shape of the existing open channel, and is arranged in order along the flow direction on the inner surface of the existing open channel to renew the open channel. An open channel rehabilitation member having a unit length used for a fiber reinforced foamed resin molded body formed by foaming and curing a urethane resin composition impregnated between a large number of glass fibers. The left side and the right side are erected on the left and right end edges of the bottom part, and project at a set length outward from the outer edge to the upper end surfaces of the left side and the right side. While the top surface reinforcing material is provided, the vertical reinforcing bar extends across the outer surface of one end of the bottom surface, left side surface, and right side surface, with one end surface protruding outward from the end surface of the bottom surface, left side surface, and right side surface by a set length. On the outer surface near the other end. The vertical reinforcing bar is provided with the other end surface facing the one end surface of the vertical reinforcing bar provided at the one end part set back from the end surface of the bottom surface part, the left side surface part and the right side surface part by a set length, A plurality of pilot holes are formed through the vertical and horizontal reinforcing bars at intervals in the width direction at both ends of the bottom surface, and when a plurality of open channel renovation members are fixed to the existing open channel, The grout hole is provided in at least one of the bottom surface portion, the left side surface portion, and the right side surface portion of the open channel renovation member so that the grout hole for filling is positioned in a set length unit.

本発明によれば、前後の開水路更生部材を対向する縦補強桟の接合により接続することができる。この場合、設定長さ単位でグラウトホールが位置するように、グラウトホールを設けた開水路更生部材を含む複数の開水路更生部材を接続することにより、設定長さ単位で設けられるグラウトホールに裏込め材のホースなどを接続すれば、裏込め材を開水路更生部材の外面と既設の開水路の内面によって形成される空間に簡単に充填することができる。充填された裏込め材は、上面補強材によってそれ以上の漏出が阻止される。 According to the present invention, the front and rear open channel renewal members can be connected by joining the opposing vertical reinforcing bars. In this case, by connecting a plurality of open channel renewal members including the open channel renovation member provided with the grout hole so that the grout hole is positioned in the set length unit, the back of the grout hole provided in the set length unit is connected. If a hose or the like of the filling material is connected, the back filling material can be easily filled into the space formed by the outer surface of the open channel renewal member and the inner surface of the existing open channel. The filled backfill material is prevented from further leakage by the top reinforcement.

本発明の開水路更生部材を用いた開水路の更生方法は、請求項５または６記載の開水路更生部材を既設の開水路に配置し、開水路更生部材を既設の開水路に底面部の下穴を通してアンカーにより固定した後、新たな開水路更生部材を既設の開水路に配置するとともに、新たな開水路更生部材をその他端面と先に固定した開水路更生部材の一端面とが略当接するように引き寄せ、先に固定した開水路更生部材の一端部に設けられた縦補強桟の一端面に、新たな開水路更生部材の他端部に設けられた縦補強桟の対向する他端面を接合した後、新たな開水路更生部材を既設の開水路に底面部の下穴を通してアンカーにより固定し、以下、グラウトホールが設定長さ単位で位置するように、新たな開水路更生部材を対向する縦補強桟の端面が接合した状態で順に固定し、次いで、固定された開水路更生部材を支保工を介して支持した後、グラウトホールを通して裏込め材を開水路更生部材の外面と既設の開水路の内面との間に充填することを特徴とするものである。 An open channel rehabilitation method using the open channel renewal member according to the present invention includes the open channel renewal member according to claim 5 or 6 disposed in an existing open water channel, and the open channel renewal member disposed on the existing open water channel. After fixing with the anchor through the pilot hole, a new open channel renovation member is placed in the existing open channel, and the other end surface of the new open channel renewal member and the one end surface of the open channel renovation member fixed earlier are approximately The other end surface of the vertical reinforcing bar provided at the other end of the new open channel renovation member is opposite to the one end surface of the vertical reinforcement member provided at one end of the open channel renewal member that has been drawn and touched After joining the new open channel renovation member, the new open channel renewal member is fixed to the existing open water channel with the anchor through the bottom hole in the bottom part, and the new open channel renewal member is set so that the grout hole is positioned in the set length unit. Opposite end faces of vertical reinforcing bars joined Then, after supporting the fixed open channel renovation member through the support, fill the backfill material between the outer surface of the open channel renewal member and the inner surface of the existing open water channel through the grout hole. It is characterized by doing.

本発明によれば、既設の開水路に順に開水路更生部材を対向する縦補強桟の端面が接合した状態で順にアンカー固定し、開水路更生部材を支保工を介して支持した後、開水路更生部材に設定長さ単位で設けられたグラウトホールに裏込め材のホースなどを接続して裏込め材を供給することにより、開水路更生部材の撓みを抑えつつ開水路更生部材の外面と既設の開水路の内面および上面補強材によって形成される空間に裏込め材を簡単に充填することができるとともに、工期を短縮して開水路を更生することが可能となる。 According to the present invention, the open channel renovation member is anchored in order in the state where the end surfaces of the vertical reinforcing bars facing each other are sequentially joined to the existing open water channel, and the open channel renewal member is supported via the support, and then the open water channel By connecting the backfilling material hose to the grout hole provided in the set length unit on the rehabilitation member and supplying the backfilling material, the outer surface of the openwater channel renovation member and the existing surface are suppressed. The backfill material can be easily filled into the space formed by the inner surface of the open channel and the upper surface reinforcing material, and the open channel can be renewed by shortening the construction period.

本発明の開水路更生部材によれば、裏込め材を簡単に充填することができる。 According to the open channel rehabilitation member of the present invention, the backfilling material can be easily filled.

また、本発明の開水路更生部材を用いた開水路の更生方法によれば、裏込め材を簡単に充填して、開水路を工期を短縮して更生することができる。 Moreover, according to the rehabilitation method of the open channel using the open channel renewal member of the present invention, it is possible to refill the open channel by shortening the construction period by simply filling the backfill material.

以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１乃至図３には、本発明の開水路更生部材１の一実施形態が示されている。 1 to 3 show an embodiment of an open channel rehabilitation member 1 according to the present invention.

この開水路更生部材１は、底面部２と、底面部２の左端部および右端部にそれぞれ沿って立設された左側面部３および右側面部４と、から主に構成され、後述する更生対象の農業用水路などの既設の開水路Ｗ（図２参照）の内面形状に略対応する外面形状を有している。そして、開水路更生部材１を構成する底面部２、左側面部３および右側面部４は、多数のガラス繊維の間に含浸されたウレタン樹脂組成物を発泡硬化させて成形された繊維強化発泡樹脂成形体（ＦＦＵ＝Fiber reinforced Formed Urethan）によって成形されている。 This open channel rehabilitation member 1 is mainly composed of a bottom surface portion 2, and a left side surface portion 3 and a right side surface portion 4 which are erected along a left end portion and a right end portion of the bottom surface portion 2, respectively. It has an outer surface shape substantially corresponding to the inner surface shape of an existing open water channel W (see FIG. 2) such as an agricultural water channel. The bottom surface portion 2, the left side surface portion 3 and the right side surface portion 4 constituting the open channel rehabilitation member 1 are formed by a fiber reinforced foamed resin molding formed by foaming and curing a urethane resin composition impregnated between a number of glass fibers. It is molded by the body (FFU = Fiber reinforced formed Urethan).

このような繊維強化発泡樹脂成形体は、遮水性、耐久性、耐磨耗性に優れるとともに、天然木材と同等の比重で軽量でありながら天然木材と同等以上の強度を有し、強度変化もほとんどなく、また、天然木材と同様の加工が可能であり、長期間水中に浸漬しても吸水することがなく、寸法、強度ともほとんど変化しない他、吸湿、乾燥による伸縮がなく、優れた寸法安定性を有するものである。 Such a fiber reinforced foamed resin molded article is excellent in water barrier properties, durability, and abrasion resistance, has a specific gravity equivalent to that of natural wood and is light, yet has strength equal to or higher than that of natural wood, and changes in strength are also possible. There is almost no processing, it can be processed in the same way as natural wood, it will not absorb water even if it is immersed in water for a long period of time, its dimensions and strength will hardly change, and there is no expansion and contraction due to moisture absorption and drying, and it has excellent dimensions It has stability.

また、開水路更生部材１を構成する左側面部３の上端面および右側面部４の上端面には、左右の側面部３，４の内面に連続する内面を有するとともに、その外端縁から外方に設定長さ突出する上面補強材５が一体に貼着されている他、左右の側面部３，４の外面には、上端面を上面補強材５の下面に当接させるとともに、下端を底面部２の外面から下方に設定長さ突出する複数本の縦補強桟６が長手方向に設定間隔をおいて一体に貼着されている。同様に、底面部２の外面にも、前述した左右の側面部３，４に貼着された各縦補強桟６に連続するように、長手方向に設定間隔をおいて複数本の縦補強桟６が一体に貼着されている。さらに、左右の側面部３，４の外面には、隣接する一対の縦補強桟６，６間において、複数本の横補強桟７が互いに連続するように高さ方向に設定間隔をおいて一体に貼着されている他、底面部２の外面にも、隣接する一対の縦補強桟６，６間において、複数本の横補強桟７が互いに連続するように幅方向に設定間隔をおいて一体に貼着されている。 In addition, the upper end surface of the left side surface portion 3 and the upper end surface of the right side surface portion 4 constituting the open channel rehabilitation member 1 have inner surfaces that are continuous with the inner surfaces of the left and right side surface portions 3, 4, and outward from the outer edge. The upper surface reinforcing material 5 that protrudes for a set length is integrally attached to the outer surface of the left and right side surface portions 3 and 4, and the upper end surface is brought into contact with the lower surface of the upper surface reinforcing material 5, and the lower end is the bottom surface A plurality of vertical reinforcing bars 6 projecting a set length downward from the outer surface of the portion 2 are integrally attached at a set interval in the longitudinal direction. Similarly, on the outer surface of the bottom surface portion 2, a plurality of vertical reinforcing bars are provided at set intervals in the longitudinal direction so as to be continuous with the vertical reinforcing bars 6 attached to the left and right side surfaces 3 and 4. 6 is stuck together. Further, the outer surfaces of the left and right side surfaces 3 and 4 are integrated with a set interval in the height direction so that a plurality of lateral reinforcing bars 7 are continuous with each other between a pair of adjacent vertical reinforcing bars 6 and 6. In addition to being attached to the outer surface of the bottom surface portion 2, a set interval in the width direction is provided between the adjacent vertical reinforcing bars 6 and 6 so that a plurality of horizontal reinforcing bars 7 are continuous with each other. It is stuck together.

なお、底面部２の前端近傍および後端近傍の外面、左右の側面部３，４の前端近傍および後端近傍の外面には、他の横補強桟７と連続するように、前端の縦補強桟６の前方および後端の縦補強桟６の後方に位置して設定長さの横補強桟７’が延設されている。 It should be noted that the longitudinal reinforcement of the front end is provided on the outer surface in the vicinity of the front end and the rear end of the bottom surface portion 2 and the outer surface in the vicinity of the front end and the rear end of the left and right side surface portions 3 and 4 so as to be continuous with other lateral reinforcing bars 7. A horizontal reinforcing bar 7 ′ having a set length is extended from the front and rear end of the vertical reinforcing bar 6 at the rear end of the bar 6.

一方、開水路更生部材１を構成する底面部２の前端近傍の外面および左右の側面部３，４の前端近傍の外面には、スペーサ８が一体に貼着されており、このスペーサ８には、複数個の取付金具１０を一体に溶着した受け金具９がビス止めされている（図１参照）。この受け金具９は、図６に示すように、スペーサ８の外面形状に沿うように、ステンレス鋼板を略Ｕ字状に折曲して形成され、その内面には、後述する止水パッキン１１を位置決めするための位置決め片９１が固定されている。また、複数個の取付金具１０は、スペーサ８の底面部分に幅方向に設定間隔をおいて、かつ、受け金具９の前端縁から一定長さ突出して設けられており、その突出部分には、取付穴１０ａが形成されている。 On the other hand, a spacer 8 is integrally attached to the outer surface near the front end of the bottom surface portion 2 constituting the open channel rehabilitation member 1 and the outer surface near the front ends of the left and right side surface portions 3, 4. A receiving bracket 9 in which a plurality of mounting brackets 10 are integrally welded is screwed (see FIG. 1). As shown in FIG. 6, the catch 9 is formed by bending a stainless steel plate into a substantially U shape so as to follow the outer surface shape of the spacer 8. A positioning piece 91 for positioning is fixed. Further, the plurality of mounting brackets 10 are provided at a set interval in the width direction on the bottom surface portion of the spacer 8 and projecting from the front end edge of the receiving bracket 9 by a predetermined length. A mounting hole 10a is formed.

この場合、受け金具９をスペーサ８に固定した際、取付金具１０の取付穴１０ａが底面部２の前端縁を越えて外方に位置するように設定されている。 In this case, when the receiving bracket 9 is fixed to the spacer 8, the mounting hole 10 a of the mounting bracket 10 is set to be located outward beyond the front edge of the bottom surface portion 2.

さらに、開水路更生部材１を構成する底面部２の後端部の外面および左右の側面部３，４の後端部の外面には、挿し金具１２がビス止めされている（図１参照）。この挿し金具１２は、図７に示すように、底面部２の外面および左右の側面部３，４の外面に沿うように、ステンレス鋼板を略Ｕ字状に折曲して形成されている。 Further, a metal fitting 12 is screwed to the outer surface of the rear end portion of the bottom surface portion 2 and the outer surfaces of the rear end portions of the left and right side surface portions 3 and 4 constituting the open channel rehabilitation member 1 (see FIG. 1). . As shown in FIG. 7, the insertion fitting 12 is formed by bending a stainless steel plate into a substantially U shape so as to follow the outer surface of the bottom surface portion 2 and the outer surfaces of the left and right side surface portions 3 and 4.

この場合、挿し金具１２を開水路更生部材１の底面部２、左側面部３および右側面部４の後端部にわたって固定した際、挿し金具１２の後端部がそれらの後端縁を越えて設定長さ突出するように設定されている。 In this case, when the insertion fitting 12 is fixed over the rear end portions of the bottom surface portion 2, the left side surface portion 3, and the right side surface portion 4 of the open channel renovation member 1, the rear end portion of the insertion fitting 12 is set beyond the rear end edge thereof. The length is set to protrude.

さらにまた、開水路更生部材１の底面部２には、複数本に１本の割合でグラウトホール１３（図４参照）が設けられている。このグラウトホール１３は、底面部２に形成された取付穴２ａに嵌合可能な筒状部と、筒状部の端部に一体に設けられたフランジ部とからなり、その中心に後述する接続ニップル１４（図９参照）の雄ねじに対応する雌ねじ１３ａが形成されている。そして、グラウトホール１３は、底面部２の外面側から取付穴２ａに筒状部が挿入され、フランジ部が底面部２の外面に接着剤を介して貼着されている。 Furthermore, the bottom part 2 of the open channel renovation member 1 is provided with grout holes 13 (see FIG. 4) at a rate of one for each. The grout hole 13 includes a cylindrical portion that can be fitted into the mounting hole 2a formed in the bottom surface portion 2, and a flange portion that is integrally provided at the end of the cylindrical portion, and a connection that will be described later at the center thereof. A female screw 13a corresponding to the male screw of the nipple 14 (see FIG. 9) is formed. And as for the grout hole 13, a cylindrical part is inserted in the attachment hole 2a from the outer surface side of the bottom face part 2, and the flange part is stuck to the outer surface of the bottom face part 2 via the adhesive agent.

次に、このように構成された開水路更生部材１を用いて既設の開水路Ｗを更生する施工手順について説明する。 Next, the construction procedure for rehabilitating the existing open channel W using the open channel renewal member 1 configured as described above will be described.

まず、渇水期において、更生する既設の開水路Ｗの流水面を更生区間にわたって洗浄した後、詳細には図示しないが、測量結果に基づいて底面部２を支持する支持金具をホールインアンカーを打ち込んで固定する。支持金具の固定が終了すれば、更生区間の後端に開水路更生部材１を配置する。次いで、開水路更生部材１の取付金具１０の取付穴１０ａを通して既設の開水路Ｗの底面にホールインアンカーを打ち込んだ後、ホールインアンカーにナットを締結し、後端の開水路更生部材１を固定する。その後、固定した開水路更生部材１の前方に新たな開水路更生部材１を配置し、接続する。具体的には、後方の開水路更生部材１の前端部に設けられた受け金具９に、前方の開水路更生部材１の後端部に設けられ、その後端縁から後方に向けて突出している挿し金具１２を合わせ、前方の開水路更生部材１を後方に引き込んで、受け金具９の内方に挿し金具１２を挿入して継手を形成する。この際、受け金具９の内面に設けられた止水パッキン１１（図３参照）に挿し金具１２の外面が接触し、受け金具９と挿し金具１２間を密封する。そして、後方の開水路更生部材１の底面部２、左右の側面部３，４の前端面に、前方の開水路更生部材１の底面部２、左右の側面部３，４の後端面が略当接する位置に達したならば、再び前方の開水路更生部材１の取付金具１０の取付穴１０ａを通して既設の開水路Ｗの底面にホールインアンカーを打ち込んだ後、ホールインアンカーにナットを締結し、次の開水路更生部材１を固定する。 First, in the drought period, the water surface of the existing open channel W to be rehabilitated is washed over the rehabilitation section, and although not shown in detail, a support fitting that supports the bottom portion 2 is driven into the hole-in anchor based on the survey result. Secure with. If fixing of a support metal fitting is complete | finished, the open channel renovation member 1 will be arrange | positioned at the rear end of a renovation area. Next, after a hole-in anchor is driven into the bottom surface of the existing open channel W through the mounting hole 10a of the mounting bracket 10 of the open channel renewal member 1, a nut is fastened to the hole-in anchor, and the open channel renewal member 1 at the rear end is fixed. Fix it. Then, the new open channel renovation member 1 is arrange | positioned ahead of the fixed open channel renovation member 1, and it connects. Specifically, it is provided at the rear end portion of the front open channel renewal member 1 on the metal fitting 9 provided at the front end portion of the rear open channel renovation member 1 and protrudes rearward from the rear edge. The insertion fittings 12 are combined, the front open channel renovation member 1 is pulled backward, and the insertion fitting 12 is inserted inside the receiving fitting 9 to form a joint. At this time, the outer surface of the metal fitting 12 comes into contact with the water-stopping packing 11 (see FIG. 3) provided on the inner surface of the metal fitting 9, and the space between the metal fitting 9 and the metal fitting 12 is sealed. And, the bottom end 2 of the rear open channel renewal member 1 and the front end surfaces of the left and right side surfaces 3 and 4 are substantially the bottom end 2 of the front open channel renewal member 1 and the rear end surfaces of the left and right side surfaces 3 and 4. When the contact position is reached, the hole-in anchor is driven into the bottom surface of the existing open channel W through the mounting hole 10a of the mounting bracket 10 of the open channel renewal member 1 at the front, and a nut is fastened to the hole-in anchor. Then, the next open channel renewal member 1 is fixed.

以下同様に、先に固定した開水路更生部材１の前方に新たな開水路更生部材１を配置し、受け金具９に挿し金具１２を合わせて継手を形成した後、ホールインアンカーおよびナットによって順に固定するものである。 Similarly, after a new open channel renewal member 1 is arranged in front of the previously fixed open channel renewal member 1, a fitting is formed by inserting the metal fitting 12 into the receiving metal fitting 9, and then sequentially using a hole-in anchor and a nut. It is to be fixed.

この場合、複数本に１本の割合で、例えば、３本に１本の割合で、グラウトホール１３が設けられた開水路更生部材１を接続し、固定する。 In this case, the open channel renovation member 1 provided with the grout hole 13 is connected and fixed at a rate of one for a plurality, for example, one for every three.

このようにして、更生区間にわたって開水路更生部材１を順次接続し、固定したならば、開水路更生部材１が浮上しないように、かつ、浮上による接合部分の段差が発生しないように、開水路更生部材１を支保工１５によって支持する。支保工１５は、例えば、図８に示すように、既設の開水路Ｗの両側に鋼材１５１を設置するとともに、左右の鋼材１５１間に設定間隔をおいて鋼材１５２を架け渡した後、設定間隔をおいて鋼材１５２と底面部２間に水圧サポート１５３を配設するととともに、左右の側面部３，４間に水圧サポート１５３を配設して構成される。 Thus, if the open channel renovation member 1 is sequentially connected and fixed over the rehabilitation section, the open channel renewal member 1 is prevented from rising and the stepped portion of the joint portion due to rising is not generated. The rehabilitation member 1 is supported by the support work 15. For example, as shown in FIG. 8, the support 15 installs the steel material 151 on both sides of the existing open channel W, and spans the steel material 152 with a set interval between the left and right steel materials 151. The hydraulic pressure support 153 is disposed between the steel material 152 and the bottom surface portion 2, and the hydraulic pressure support 153 is disposed between the left and right side surface portions 3 and 4.

支保工１５を設置したならば、グラウトホール１３に接続ニップル１４を接続するとともに、接続ニップル１４にホース１４１を接続した後、図示しないコンクリートポンプを作動させて裏込め材Ｃを開水路更生部材１の外面と既設の開水路Ｗの内面との空間に供給する。 If the support work 15 is installed, after connecting the connection nipple 14 to the grout hole 13 and connecting the hose 141 to the connection nipple 14, the concrete pump (not shown) is operated to turn the backfill material C into the open channel renewal member 1. To the space between the outer surface and the inner surface of the existing open channel W.

このとき、裏込め材Ｃは、開水路更生部材１の幅方向中央から左右の側壁部３，４の外面側にほぼ均等に分かれて充填されるため、相対的に流動抵抗が小さくなり、コンクリートポンプによる裏込め材Ｃの吐出圧を小さくすることができる。具体的には、開水路更生部材１の強度も考慮しつつ、高さ２ｍの開水路更生部材１に対応することができるように、裏込め材Ｃの吐出圧は、０．２ＭＰａに設定されている。 At this time, since the backfilling material C is almost equally divided from the center in the width direction of the open channel rehabilitation member 1 to the outer surface side of the left and right side wall portions 3 and 4, the flow resistance becomes relatively small, and the concrete is reduced. The discharge pressure of the backfill material C by the pump can be reduced. Specifically, the discharge pressure of the backfill material C is set to 0.2 MPa so that it can correspond to the open channel renewal member 1 having a height of 2 m while considering the strength of the open channel renovation member 1. ing.

また、グラウトホール１３を通して供給された裏込め材Ｃは、底面部２の外面と既設の開水路Ｗの底面との空間を充填するとともに、左側面部３の外面と既設の開水路Ｗの左側面との空間および右側面部４の外面と既設の開水路Ｗの右側面との空間に達し、充填する。この際、裏込め材Ｃは、左右の側面部３，４の外面と既設の開水路Ｗの左右側面とによって形成される空間の上方開口部を通して外部に漏出しようとするが、この上方開口部は、上面補強材５によってほぼ閉鎖されており、かつ、ほぼ左右均等の流動抵抗となることに対応して、上面補強材５に到達するために必要な裏込め材Ｃの吐出圧力を調整することができ、裏込め材Ｃの漏出を抑えることができる。 The backfilling material C supplied through the grout hole 13 fills the space between the outer surface of the bottom surface portion 2 and the bottom surface of the existing open channel W, and also the outer surface of the left side surface portion 3 and the left side surface of the existing open channel W. And the space between the outer surface of the right side surface portion 4 and the right side surface of the existing open channel W are filled. At this time, the backfill material C tends to leak outside through the upper opening of the space formed by the outer surfaces of the left and right side surfaces 3 and 4 and the left and right side surfaces of the existing open channel W. Is substantially closed by the upper surface reinforcing material 5 and adjusts the discharge pressure of the backfilling material C required to reach the upper surface reinforcing material 5 in response to the flow resistance being substantially equal to the left and right. And leakage of the backfill material C can be suppressed.

ここで、裏込め材Ｃとしては、明興防水株式会社の製造販売に係る軽量多孔質繊維強化コンクリート（商品名：エコセルロ（登録商標）モルタル）を用いることが好ましい。すなわち、エコセルロ（登録商標）モルタルは、製紙工場より排出される副産物を利用して加工した繊維質物質（エコセルロ（登録商標））を発泡コンクリートの材料に使用したものであり、繊維が気泡、セメント粒子、水を抱き込み、水を完全に押し出して隙間のない充填が可能になる利点がある。 Here, as the backfill material C, it is preferable to use lightweight porous fiber reinforced concrete (trade name: Eco-Cellulo (registered trademark) mortar) according to the manufacture and sale of Meiko Waterproof Co., Ltd. In other words, Eco-Cellulo (registered trademark) mortar uses a fibrous material (Eco-Cellulo (registered trademark)) processed by using by-products discharged from a paper mill as a material for foamed concrete. There is an advantage that particles and water are embraced and water is completely pushed out to allow filling without gaps.

このため、エコセルロ（登録商標）モルタルを裏込め材Ｃとして採用するときには、既設の開水路Ｗに水が浸入したとしても、水を外部に押し出して裏込め材Ｃを開水路更生部材１の外面と既設の開水路Ｗの表面との空間に隙間なく充填することができる。 For this reason, when Eco-Cellulo (registered trademark) mortar is adopted as the backfill material C, even if water enters the existing open channel W, the water is pushed out and the backfill material C is exposed to the outer surface of the open channel renewal member 1. And the space between the existing open water channel W and the surface of the existing open water channel W can be filled without a gap.

裏込め材Ｃが硬化したならば、接続ニップル１４からホース１４１を離脱させるとともに、グラウトホール１３から接続ニップル１４を離脱させた後、支保工１５を撤去し、次いで、底面部２に形成された取付穴２ａに図示しない栓体を嵌合接着し、その表面が底面部２の表面と面一となるように調整し、合わせて開水路更生部材１の内面を清掃する。 When the backfill material C is cured, the hose 141 is detached from the connection nipple 14 and the connection nipple 14 is detached from the grout hole 13, and then the support 15 is removed, and then the bottom portion 2 is formed. A stopper (not shown) is fitted and bonded to the mounting hole 2a, adjusted so that the surface thereof is flush with the surface of the bottom surface portion 2, and the inner surface of the open channel renewal member 1 is also cleaned.

なお、前述した開水路更生部材１の実施形態においては、前端部に受け金具９を、後端部に挿し金具１２をそれぞれ設けた場合を例示したが、前端部に挿し金具１２を、後端部に受け金具９をそれぞれ設けるようにしてもよく、また、止水パッキン１１を挿し金具１２の外面に設けるようにしてもよい。 In the above-described embodiment of the open channel rehabilitation member 1, the case where the metal fitting 9 is provided at the front end and the metal fitting 12 is provided at the rear end is illustrated, but the metal fitting 12 is provided at the front end. Receiving brackets 9 may be provided on the respective parts, or a water-stopping packing 11 may be inserted and provided on the outer surface of the bracket 12.

ところで、前述した開水路更生部材１においては、前後の開水路更生部材１，１を受け金具９と挿し金具１２による継手によって接続する場合を例示したが、図１０および図１１に示す開水路更生部材１を採用することもできる。 By the way, in the open channel renovation member 1 described above, the case where the front and rear open channel renewal members 1 and 1 are connected by the joints of the metal fittings 9 and the fittings 12 is illustrated, but the open water channel renovation shown in FIGS. The member 1 can also be employed.

この開水路更生部材１も、繊維強化発泡樹脂成形体製の底面部２と、底面部２の左端縁部および右端縁部にそれぞれ立設された左側面部３および右側面部４と、から主に構成され、既設の開水路Ｗの内面形状に略対応する外面形状を有している。 This open water channel renewal member 1 is also mainly composed of a bottom surface portion 2 made of a fiber reinforced foamed resin molded body, and a left side surface portion 3 and a right side surface portion 4 erected on the left end edge portion and the right end edge portion of the bottom surface portion 2, respectively. It is comprised and has the outer surface shape substantially corresponding to the inner surface shape of the existing open water channel W.

なお、この開水路更生部材１も、前述した開水路更生部材１と基本構造は同一であり、同一の部材には同一の符号を付してその詳細な説明を省略し、相違する点についてのみ説明する。 The open channel renewal member 1 has the same basic structure as the open channel renewal member 1 described above, the same reference numerals are assigned to the same members, and detailed descriptions thereof are omitted, and only differences are noted. explain.

開水路更生部材１を更生する左側面部３および右側面部４の外面には、上端面を上面補強材５の下面に当接させるとともに、下端を底面部２の外面から下方に設定長さ突出する複数本の縦補強桟６が両端部の縦補強桟６１，６２とともに長手方向に設定間隔をおいて一体に貼着されている。同様に、底面部２の外面にも、前述した左右の側面部３，４に貼着された各縦補強桟６に連続するように、両端部とともに長手方向に設定間隔をおいて複数本の縦補強桟６が一体に貼着されている。さらに、左側面部３および右側面部４の外面には、隣接する一対の縦補強桟６１，６，６２間において、複数本の横補強桟７が互いに連続するように高さ方向に設定間隔をおいて一体に貼着されている他、底面部２の外面にも、隣接する一対の縦補強桟６１，６，６２間において、複数本の横補強桟７が互いに連続するように幅方向に設定間隔をおいて一体に貼着されている。 On the outer surfaces of the left side surface portion 3 and the right side surface portion 4 that rehabilitate the open channel rehabilitation member 1, the upper end surface is brought into contact with the lower surface of the upper surface reinforcing member 5, and the lower end protrudes downward from the outer surface of the bottom surface portion 2 by a set length. A plurality of vertical reinforcing bars 6 are integrally attached together with the vertical reinforcing bars 61 and 62 at both ends at a set interval in the longitudinal direction. Similarly, on the outer surface of the bottom surface portion 2, a plurality of pieces are provided at a set interval in the longitudinal direction together with both end portions so as to be continuous with the vertical reinforcing bars 6 attached to the left and right side surface portions 3 and 4. A longitudinal reinforcing bar 6 is integrally attached. Further, on the outer surfaces of the left side surface portion 3 and the right side surface portion 4, a set interval is set in the height direction so that a plurality of lateral reinforcing bars 7 are continuous with each other between a pair of adjacent vertical reinforcing bars 61, 6, 62. In addition to being attached integrally, the outer surface of the bottom surface 2 is set in the width direction so that a plurality of lateral reinforcing bars 7 are continuous with each other between a pair of adjacent vertical reinforcing bars 61, 6 and 62. Affixed together at intervals.

ここで、開水路更生部材１を更生する底面部２、左側面部３および右側面部４の前端部および後端部にそれぞれ設けられた縦補強桟６１，６２のうち、前端部に設けられた縦補強桟６１は、その前端面が底面部２、左側面部３および右側面部４の前端縁から前方に設定長さ突出するように設けられ、また、後端部に設けられた縦補強桟６２は、その後端面が底面部２、左側面部３および右側面部４の後端縁から前方に設定長さ後退して設けられている。そして、前後方向に隣接する開水路更生部材１，１において、後方の開水路更生部材１の前端面と、前方の開水路更生部材１の後端面とが略当接するように相対的に移動させた際、前方の開水路更生部材１の後端部に設けられた縦補強桟６２の後端面と、後方の開水路更生部材１の前端部に設けられた縦補強桟６１の前端面とが接合するように設定されている。 Here, the vertical reinforcing bars 61 and 62 provided at the front end part and the rear end part of the bottom face part 2, the left side face part 3, and the right side face part 4 that rehabilitate the open channel rehabilitation member 1, are provided at the front end part. The reinforcing bar 61 is provided such that the front end surface protrudes forward from the front end edges of the bottom surface part 2, the left side surface part 3 and the right side surface part 4, and the vertical reinforcing bar 62 provided at the rear end part is The rear end surface of the bottom surface portion 2, the left side surface portion 3, and the right side surface portion 4 is provided so as to recede forward by a set length from the rear end edges. And in the open channel renovation members 1 and 1 adjacent to each other in the front-rear direction, the front end surface of the rear open channel renewal member 1 and the rear end surface of the front open channel renewal member 1 are relatively moved. The rear end surface of the vertical reinforcing bar 62 provided at the rear end of the front open channel renovation member 1 and the front end surface of the vertical reinforcing bar 61 provided at the front end of the rear open channel renewal member 1. It is set to join.

また、底面部２の前端部および後端部には、幅方向に間隔をおいて複数個の下穴２ｘが両端部の縦補強桟６を貫通して形成されている。この下穴２ｘは、ホールインアンカーを打ち込むために形成され、底面部２に形成された穴の径がホールアンカーに締結するナットに対応して大径に形成され、縦補強桟６に形成された穴の径がホールインアンカーの軸に対応して小径に形成されている。 Further, a plurality of pilot holes 2x are formed in the front end portion and the rear end portion of the bottom surface portion 2 so as to penetrate the vertical reinforcing bars 6 at both end portions at intervals in the width direction. The pilot hole 2x is formed to drive the hole-in anchor, and the diameter of the hole formed in the bottom surface portion 2 is formed to have a large diameter corresponding to a nut fastened to the hole anchor, and is formed in the longitudinal reinforcing bar 6. The diameter of the hole is formed with a small diameter corresponding to the axis of the hole-in anchor.

次に、このように構成された開水路更生部材１を用いて既設の開水路Ｗを更生する場合も同様に施工することができる。 Next, when the existing open channel W is rehabilitated using the open channel renewal member 1 configured as described above, the construction can be similarly performed.

具体的には、更生する既設の開水路Ｗの流水面を更生区間にわたって洗浄した後、底面部２を支持する支持金具をホールインアンカーを打ち込んで固定する。次いで、更生区間の後端に開水路更生部材１を配置した後、底面部２の下穴２ｘを通して既設の開水路Ｗの底面にホールインアンカーを打ち込み、ホールインアンカーにナットを締結し、後端の開水路更生部材１を固定する。その後、固定した開水路更生部材１の前方に新たな開水路更生部材１を配置し、後方の開水路更生部材１の前端部に設けられた縦補強桟６に、前方の開水路更生部材１の後端部を合わせ、前方の開水路更生部材１を後方に引き込む。この際、前方の開水路更生部材１の後端部に設けられた縦補強桟６の後端面に水膨張性ゴム１６（図１１参照）が貼着されており、前方の開水路更生部材１の後端部に設けられた縦補強桟６２の後端面と、後方の開水路更生部材１の前端部に設けられた縦補強桟６１の前端面とが水膨張性ゴム１６を介して接合される。このため、前方の開水路更生部材１の後端部に設けられた縦補強桟６２と、後方の開水路更生部材１の前端部に設けられた縦補強桟６１との接合部が水膨張性ゴム１６によって密封される。 Specifically, after cleaning the flowing water surface of the existing open channel W to be rehabilitated over the rehabilitation section, the support fitting that supports the bottom surface portion 2 is driven and fixed with a hole-in anchor. Next, after the open channel renovation member 1 is disposed at the rear end of the rehabilitation section, a hole-in anchor is driven into the bottom surface of the existing open channel W through the pilot hole 2x of the bottom surface portion 2, and a nut is fastened to the hole-in anchor. The open channel renewal member 1 at the end is fixed. Thereafter, a new open channel renovation member 1 is disposed in front of the fixed open channel renovation member 1, and the front open channel renovation member 1 is placed on the vertical reinforcing bar 6 provided at the front end of the rear open channel renewal member 1. The rear end portions are aligned, and the front open channel renewal member 1 is pulled backward. Under the present circumstances, the water expansion rubber | gum 16 (refer FIG. 11) is affixed on the rear-end surface of the vertical reinforcement crosspiece 6 provided in the rear-end part of the front open channel renovation member 1, and the front open-channel renewal member 1 is attached. The rear end face of the vertical reinforcing bar 62 provided at the rear end part and the front end face of the vertical reinforcing bar 61 provided at the front end part of the rear open channel renewal member 1 are joined via the water-expandable rubber 16. The For this reason, the joint part between the vertical reinforcing bar 62 provided at the rear end portion of the front open channel renovation member 1 and the vertical reinforcing bar 61 provided at the front end portion of the rear open channel renewal member 1 is water-expandable. Sealed by rubber 16.

この後、前方の開水路更生部材１の底面部２の下穴２ｘを通して既設の開水路Ｗの底面にホールインアンカーを打ち込んだ後、ホールインアンカーにナットを締結し、開水路更生部材１を固定する。 After that, after a hole-in anchor is driven into the bottom surface of the existing open channel W through the pilot hole 2x of the bottom surface portion 2 of the front open channel renewal member 1, a nut is fastened to the hole-in anchor, and the open channel renewal member 1 is fixed. Fix it.

以下同様に、先に固定した開水路更生部材１の前方に新たな開水路更生部材１を配置し、それらの開水路更生部材１の前端部および後端部において対向する縦補強桟６を水膨張性ゴムを介して接合した後、ホールインアンカーおよびナットによって順に固定するものである。 Similarly, a new open channel renovation member 1 is arranged in front of the previously fixed open channel renovation member 1, and the vertical reinforcing bars 6 facing each other at the front end and the rear end of the open channel renewal member 1 are watered. After joining via inflatable rubber, it fixes in order with a hole-in anchor and a nut.

この場合も、複数本に１本の割合で、例えば、３本に１本の割合で、グラウトホール１３が設けられた開水路更生部材１を接続し、固定する。 Also in this case, the open channel renovation member 1 provided with the grout hole 13 is connected and fixed at a rate of one for a plurality, for example, one for every three.

このようにして、更生区間にわたって開水路更生部材１を順次接続し、固定したならば、開水路更生部材１が浮上しないように、かつ、浮上による接合部分の段差が発生しないように、開水路更生部材１を支保工１５によって支持した後、グラウトホール１３に接続ニップル１４を接続するとともに、接続ニップル１４にホース１４１を接続した後、図示しないコンクリートポンプを作動させて裏込め材Ｃを開水路更生部材１の外面と既設の開水路Ｗの内面との空間に供給すればよい。 Thus, if the open channel renovation member 1 is sequentially connected and fixed over the rehabilitation section, the open channel renewal member 1 is prevented from rising and the stepped portion of the joint portion due to rising is not generated. After the rehabilitation member 1 is supported by the support 15, the connection nipple 14 is connected to the grout hole 13, the hose 141 is connected to the connection nipple 14, and then a concrete pump (not shown) is operated to open the backfill material C. What is necessary is just to supply to the space of the outer surface of the rehabilitation member 1 and the inner surface of the existing open channel W.

なお、開水路更生部材の両端部に縦補強桟を設ける実施形態においては、後端部に設ける縦補強桟を設定長さ後方に突出させ、前端部に設ける縦補強桟を設定長さ後方に後退させるようにしてもよい。 In the embodiment in which the vertical reinforcing bars are provided at both ends of the open channel rehabilitation member, the vertical reinforcing bars provided at the rear end are projected rearward by the set length, and the vertical reinforcing bars provided at the front end are provided rearward by the set length. You may make it reverse.

以上のように本発明によれば、既設の開水路を開水路更生部材によって簡単に更生することができることから、水資源を有効に、かつ、安全に活用することができる。 As described above, according to the present invention, an existing open channel can be easily rehabilitated by the open channel renewal member, so that water resources can be effectively and safely utilized.

本発明の開水路更生部材の一実施形態を示す平面図および側面図である。It is the top view and side view which show one Embodiment of the open channel renovation member of this invention. 図１のＡ−Ａ線端面図である。It is an AA line end view of FIG. 図１のＢ−Ｂ線端面図である。FIG. 3 is an end view taken along line BB in FIG. 1. 図１のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 図１の開水路更生部材を一部省略して示す平面図および側面図である。It is the top view and side view which abbreviate | omits and shows a part of open channel renovation member of FIG. 受け金具を示す平面図、正面図および側面図である。It is the top view which shows a receiving metal fitting, a front view, and a side view. 挿し金具を示す平面図、正面図および側面図である。It is the top view which shows an insertion metal fitting, a front view, and a side view. 図１の開水路更生部材を用いて開水路を更生する際の支保工を説明する正面図である。It is a front view explaining the support work at the time of renovating an open channel using the open channel renovation member of FIG. 開水路更生部材の背面側に裏込め剤を充填する工程を説明する断面図である。It is sectional drawing explaining the process of filling a backfilling agent in the back side of an open channel renovation member. 本発明の開水路更生部材の他の実施形態を示す平面図および側面図である。It is the top view and side view which show other embodiment of the open channel renovation member of this invention. 図８の開水路更生部材を接続する際の前端部と後端部の関係を説明する拡大断面図である。It is an expanded sectional view explaining the relationship between the front-end part at the time of connecting the open channel renovation member of FIG. 8, and a rear-end part.

符号の説明Explanation of symbols

１開水路更生部材
２底面部
２ａ取付穴
２ｘ下穴
３左側面部
４右側面部
５上面補強材
６，６１，６２縦補強桟
７横補強桟
８スペーサ
９受け金具
１０取付金具
１１止水パッキン
１２挿し金具
１３グラウトホール
１４接続ニップル
１５支保工
１６水膨張性ゴム
Ｃ裏込め材
Ｗ既設の開水路 DESCRIPTION OF SYMBOLS 1 Open channel renewal member 2 Bottom face part 2a Mounting hole 2x Lower hole 3 Left side face part 4 Right side face part 5 Top face reinforcing material 6, 61, 62 Vertical reinforcing bar 7 Horizontal reinforcing bar 8 Spacer 9 Receiving bracket 10 Mounting bracket 11 Water stop packing 12 Insertion Metal fitting 13 Grout hole 14 Connection nipple 15 Support 16 Water-expandable rubber C Backing material W Existing open channel

Claims

既設の開水路の内面形状に略相似形の外面形状を有し、既設の開水路の内面に流れ方向に沿って順に配設して開水路を更生するために用いられる単位長さの開水路更生部材であって、該開水路更生部材は、多数のガラス繊維の間に含浸されたウレタン樹脂組成物を発泡硬化させて成形された繊維強化発泡樹脂成形体から形成され、底面部と、底面部の左右端縁部に立設された左側面部および右側面部とからなり、左側面部および右側面部の上端面に外端縁から外方に設定長さ突出する上面補強材が設けられる一方、底面部、左側面部および右側面部の一端部近傍の外面にわたって設けられたスペーサに受け金具が固定されるとともに、該受け金具の底面部分に取付穴を形成した複数個の取付金具が該取付穴を底面部の一端縁から外方に突出して位置するように固定され、また、底面部、左側面部および右側面部の他端部の外面にわたって前記受け金具の内面側に重合可能な挿し金具が設けられるとともに、受け金具の内面または挿し金具の外面にわたって止水パッキンが設けられ、さらに、既設の開水路に複数の開水路更生部材を配設した際に、裏込め材を充填するためのグラウトホールが設定長さ単位で位置するように、開水路更生部材の底面部、左側面部および右側面部の少なくとも一つにグラウトホールが設けられることを特徴とする開水路更生部材。 A unit-length open channel that has an outer surface shape that is substantially similar to the inner surface shape of an existing open channel, and is arranged in order along the flow direction on the inner surface of the existing open channel to rehabilitate the open channel A rehabilitation member, wherein the open channel rehabilitation member is formed from a fiber-reinforced foamed resin molded body formed by foaming and curing a urethane resin composition impregnated between a large number of glass fibers, and a bottom surface portion and a bottom surface The left side surface portion and the right side surface portion are erected on the left and right edge portions of the portion, and the upper surface of the left side surface portion and the right side surface portion is provided with an upper surface reinforcing material protruding outward from the outer edge by a set length, while the bottom surface The bracket is fixed to the spacer provided on the outer surface near the one end of the right side portion and the left side surface portion, and a plurality of mounting brackets in which mounting holes are formed in the bottom surface portion of the bracket include the mounting hole on the bottom surface. Protruding outward from one edge of the section In addition, an insertion fitting that can be superposed on the inner surface side of the receiving bracket is provided over the outer surfaces of the bottom surface, the left side surface, and the other end of the right side surface, and the inner surface of the receiving bracket or the outer surface of the insertion bracket In addition, when a plurality of open channel renewal members are installed in the existing open channel, the water stop packing is provided so that the grout hole for filling the backfill material is positioned in the set length unit. An open channel renovation member, wherein a grout hole is provided in at least one of a bottom surface portion, a left side surface portion, and a right side surface portion of the water channel renovation member.

前記底面部、左側面部および右側面部の外面にわたって長手方向に間隔をおいて複数本の縦補強桟が設けられるとともに、隣接する縦補強桟間に幅方向および高さ方向に間隔をおいて複数本の横補強桟が設けられることを特徴とする請求項１記載の開水路更生部材。 A plurality of vertical reinforcing bars are provided in the longitudinal direction across the bottom surface, the left side part, and the right side part, and a plurality of vertical reinforcing bars are provided in the width direction and the height direction between adjacent vertical reinforcing bars. The open channel rehabilitation member according to claim 1, wherein a horizontal reinforcing bar is provided.

請求項１または２記載の開水路更生部材を既設の開水路に配置し、開水路更生部材を既設の開水路に取付金具の取付穴を通してアンカーにより固定した後、新たな開水路更生部材を既設の開水路に配置するとともに、新たな開水路更生部材をその他端面と先に固定した開水路更生部材の一端面とが略当接するように引き寄せ、先に固定した開水路更生部材の受け金具に新たな開水路更生部材の挿し金具を差し込んで継手を形成した後、新たな開水路更生部材を既設の開水路に取付金具の取付穴を通してアンカーにより固定し、以下、グラウトホールが設定長さ単位で位置するように、新たな開水路更生部材を受け金具と挿し金具が継手を形成した状態で順に固定し、次いで、固定された開水路更生部材を支保工を介して支持した後、グラウトホールを通して裏込め材を開水路更生部材の外面と既設の開水路の内面との間に充填することを特徴とする開水路更生部材を用いた開水路の更生方法。 The open channel rehabilitation member according to claim 1 or 2 is arranged in an existing open water channel, the open channel renewal member is fixed to the existing open water channel by an anchor through a mounting hole of a mounting bracket, and then a new open water channel renewal member is installed. The new open channel renovation member is drawn so that the other end face and one end surface of the open channel renewal member fixed earlier are in close contact with each other, and is attached to the bracket of the open water renewal member fixed earlier. After inserting a fitting for a new open channel renovation member and forming a joint, a new open channel renewal member is fixed to the existing open channel with an anchor through a mounting hole in the mounting bracket. The new open channel renewal member is fixed in order with the fitting and the fitting forming a joint so that the new open channel renovation member is located in the joint, and then the fixed open channel renewal member is supported through a support, and then grouted. Rehabilitation method for open channel with open channel rehabilitation member, characterized in that the filling between the open channel of the inner surface outer surface of the existing open channel retreading member back-filling material through Lumpur.

前記裏込め材が軽量多孔質繊維強化コンクリートであることを特徴とする請求項３記載の開水路更生部材を用いた開水路の更生方法。 The method for rehabilitating an open channel using the open channel renewal member according to claim 3, wherein the backfill material is lightweight porous fiber reinforced concrete.

既設の開水路の内面形状に略相似形の外面形状を有し、既設の開水路の内面に流れ方向に沿って順に配設して開水路を更生するために用いられる単位長さの開水路更生部材であって、該開水路更生部材は、多数のガラス繊維の間に含浸されたウレタン樹脂組成物を発泡硬化させて成形された繊維強化発泡樹脂成形体から形成され、底面部と、底面部の左右端縁部に立設された左側面部および右側面部とからなり、左側面部および右側面部の上端面に外端縁から外方に設定長さ突出する上面補強材が設けられる一方、底面部、左側面部および右側面部の一端部の外面にわたって縦補強桟がその一端面を底面部、左側面部および右側面部の端面から外方に設定長さ突出して設けられるとともに、他端部近傍の外面にわたって縦補強桟が、一端部に設けられた縦補強桟の一端面に対向する他端面を底面部、左側面部および右側面部の端面から内方に設定長さ後退して設けられ、また、底面部の両端部に幅方向に間隔をおいて複数個の下穴が縦横補強桟を貫通して形成され、既設の開水路に複数の開水路更生部材を固定した際に、裏込め材を充填するためのグラウトホールが設定長さ単位で位置するように、開水路更生部材の底面部、左側面部および右側面部の少なくとも一つにグラウトホールが設けられることを特徴とする開水路更生部材。 A unit-length open channel that has an outer surface shape that is substantially similar to the inner surface shape of an existing open channel, and is arranged in order along the flow direction on the inner surface of the existing open channel to rehabilitate the open channel A rehabilitation member, wherein the open channel rehabilitation member is formed from a fiber-reinforced foamed resin molded body formed by foaming and curing a urethane resin composition impregnated between a large number of glass fibers, and a bottom surface portion and a bottom surface The left side surface portion and the right side surface portion are erected on the left and right edge portions of the portion, and the upper surface of the left side surface portion and the right side surface portion is provided with an upper surface reinforcing material protruding outward from the outer edge by a set length, while the bottom surface The vertical reinforcing bar extends over the outer surface of one end portion of the left side portion and the right side portion, and has one end surface protruding outward from the end surface of the bottom portion, left side portion and right side portion, and an outer surface near the other end portion. Longitudinal reinforcing bars over one end The other end surface facing the one end surface of the vertical reinforcing bar is set back from the end surface of the bottom surface portion, the left side surface portion, and the right side surface inward by a set length, and spaced in the width direction at both ends of the bottom surface portion. A plurality of pilot holes are formed through the vertical and horizontal reinforcing bars, and when a plurality of open channel rehabilitation members are fixed to the existing open channel, the grout hole for filling the backfill material is set length An open channel renovation member, wherein a grout hole is provided in at least one of a bottom surface portion, a left side surface portion, and a right side surface portion of the open channel renovation member so as to be positioned as a unit.

前記底面部、左側面部および右側面部の外面にわたって長手方向に間隔をおいて複数本の縦補強桟が設けられるとともに、隣接する縦補強桟間に幅方向および高さ方向に間隔をおいて複数本の横補強桟が設けられることを特徴とする請求項５記載の開水路更生部材。 A plurality of vertical reinforcing bars are provided in the longitudinal direction across the bottom surface, the left side surface, and the right side surface, and a plurality of vertical reinforcing bars are spaced in the width direction and the height direction between adjacent vertical reinforcing bars. An open channel rehabilitation member according to claim 5, wherein a horizontal reinforcing bar is provided.

請求項５または６記載の開水路更生部材を既設の開水路に配置し、開水路更生部材を既設の開水路に底面部の下穴を通してアンカーにより固定した後、新たな開水路更生部材を既設の開水路に配置するとともに、新たな開水路更生部材をその他端面と先に固定した開水路更生部材の一端面とが略当接するように引き寄せ、先に固定した開水路更生部材の一端部に設けられた縦補強桟の一端面に、新たな開水路更生部材の他端部に設けられた縦補強桟の対向する他端面を接合した後、新たな開水路更生部材を既設の開水路に底面部の下穴を通してアンカーにより固定し、以下、グラウトホールが設定長さ単位で位置するように、新たな開水路更生部材を対向する縦補強桟の端面が接合した状態で順に固定し、次いで、固定された開水路更生部材を支保工を介して支持した後、グラウトホールを通して裏込め材を開水路更生部材の外面と既設の開水路の内面との間に充填することを特徴とする開水路更生部材を用いた開水路の更生方法。 The open channel renovation member according to claim 5 or 6 is arranged in an existing open water channel, and the open channel renewal member is fixed to the existing open water channel with an anchor through a bottom hole in the bottom portion, and then a new open channel renewal member is installed. The new open channel renovation member is drawn so that the other end face and one end surface of the open channel renovation member fixed earlier are substantially in contact with each other, and is attached to one end of the open water renewal member fixed earlier. After joining the other end face of the vertical reinforcing bar provided at the other end of the new open channel renovation member to one end surface of the provided vertical reinforcing bar, the new open channel renewal member is connected to the existing open channel. Fix it with an anchor through the bottom hole in the bottom, and then fix the new open channel renovation member in order with the end faces of the vertical reinforcing bars facing each other so that the grout hole is located in the set length unit, then , Fixed open channel rehabilitation member After supporting through the support, the backfill material is filled between the outer surface of the open channel renovation member and the inner surface of the existing open channel through the grout hole. Rehabilitation method.

前記裏込め材が軽量多孔質繊維強化コンクリートであることを特徴とする請求項７記載の開水路更生部材を用いた開水路の更生方法。 The method for rehabilitating an open channel using the open channel renewal member according to claim 7, wherein the backfill material is lightweight porous fiber reinforced concrete.