JP4079435B2 - Construction method of PC inclined formwork and dam body for dam construction - Google Patents

Construction method of PC inclined formwork and dam body for dam construction Download PDF

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JP4079435B2
JP4079435B2 JP2004106767A JP2004106767A JP4079435B2 JP 4079435 B2 JP4079435 B2 JP 4079435B2 JP 2004106767 A JP2004106767 A JP 2004106767A JP 2004106767 A JP2004106767 A JP 2004106767A JP 4079435 B2 JP4079435 B2 JP 4079435B2
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plate
wall plate
pedestal
anchor bolt
vertical surface
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武宣 山下
辰雄 小合澤
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内閣府沖縄総合事務局長
財団法人ダム技術センター
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本発明は、台形CSGダムなどの斜面の施工に際して、PC傾斜型枠を用いることによって、施工を簡易化でき、しかも工期の短縮を可能にする技術に関する。 The present invention relates to a technique that can simplify the construction and shorten the construction period by using a PC inclined mold when constructing a slope such as a trapezoidal CSG dam.

PC(プレキャスト)型枠およびその組立て方法として、特開平8−199708号公報に記載のように、工事現場でのセットや組立てが容易で、基本的には型枠支保が不要で、作業性がよく、後打ちコンクリートとの一体性も確保でき、構造物の一部として機能させる技術が提案されている。このPC型枠利用工法は、外方に突出する上段パネルと該上段パネルと段部を介してこれに連続して形成される内方に突出する下段パネルとで型枠パネルを構成し、組立てに際しては、下方の型枠パネルの上段パネルの裏面に、上方の型枠パネルの下段パネルの表面を重ね合わせる施工方法を採っている。 As described in JP-A-8-199708, PC (precast) formwork and its assembly method are easy to set and assemble at the construction site, basically no formwork support is required and workability is improved. Well, there is a proposal for a technique that can ensure integrity with post-cast concrete and function as part of a structure. In this PC formwork construction method, an upper panel protruding outward and a lower panel protruding inward through the upper panel and the stepped portion are formed into an assembly panel. At this time, a construction method is employed in which the surface of the lower panel of the upper formwork panel is superimposed on the back surface of the upper panel of the lower formwork panel.

また、別の工法として、実開平6-14225号公報に記載のように、ブロックにしてコンクリート構造物の足場および型枠を省略して構造物の一部となし、しかもブロックを簡単かつ確実に据え付け固定し、構造物の美的外観を得るために、法壁用プレキャストコンクリートブロックは、平板状の前面部と、後面部の左右両端部に設けられた切りかき溝部と、固定金具と、リフトアンカー金具と、ストッパー金具を設けた構造になっている。
特開平8−199708 実開平6-14225
As another construction method, as described in Japanese Utility Model Laid-Open No. 6-14225, a block is used as a block by omitting the scaffolding and formwork of the concrete structure, and the block is easily and reliably constructed. In order to fix and obtain an aesthetic appearance of the structure, the precast concrete block for the wall is made up of a flat plate-shaped front part, notched grooves provided on the left and right ends of the rear part, fixing brackets, lift anchors It has a structure with metal fittings and stopper metal fittings.
JP-A-8-199708 6-14225

ところが、特許文献1のようなPC型枠は、組立て施工時のPC型枠の支えが困難なため、特別な支持構造が必要となり、特に法面のように傾斜した場所には適しない。また、上段パネルと下段パネルを重ねて使用するため、すべて2枚重ねとなり、作業工数増加の要因となり、能率的とはいえない。 However, since the PC form as in Patent Document 1 is difficult to support the PC form during assembly, a special support structure is required, and it is not particularly suitable for an inclined place such as a slope. In addition, since the upper panel and the lower panel are used in an overlapping manner, all the two panels are stacked, which causes an increase in work man-hours and is not efficient.

特許文献2の技術も、法壁用プレキャストコンクリートブロックを一定の角度で規定の位置に精度良く据え付ける作業が困難であり、また据え付け後は、重機で前記ブロックを吊った状態で、後面部に埋め込まれている固定金具と構造物本体に埋め込まれている固定用フックとを連結鉄棒で連結して、溶接又はネジ止めする必要があり、支持作業が面倒で、危険でもある。 In the technique of Patent Document 2, it is difficult to accurately install a precast concrete block for a wall at a specified angle at a predetermined position. After installation, the block is suspended in a heavy machine and embedded in the rear surface. It is necessary to connect the fixing bracket and the fixing hook embedded in the structure body with a connecting iron bar, and weld or screw them together, which is troublesome and dangerous.

本発明の技術的課題は、従来技術におけるこのような問題に着目し、PC型枠を用いて、ダム堤体や法面などのような傾斜面を施工する際に、PC型枠を自立可能な構造とすることによって、PC型枠の据え付け作業の簡易化を図り、しかも簡易な固定だけで、後打ちコンクリートの打設が可能とすることにある。 The technical problem of the present invention is that such a problem in the prior art is focused on, and when using a PC formwork to construct an inclined surface such as a dam dam body or a slope, the PC formwork can be self-supporting. By adopting a simple structure, it is possible to simplify the installation work of the PC formwork and to allow the placement of post-cast concrete only by simple fixing.

本発明の技術的課題は次のような手段によって解決される。請求項1は、ダム堤体などの斜面を施工する際に用いるPC傾斜型枠における水平の台座版と斜壁版が連続部を介して一体となり、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな構造において、
前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記連続部の正面に形成した鉛直面と背面に形成した鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあること、
前記斜壁版の頂端背面には、アンカーボルトの位置決め時の基準面並びに保護遮水コンクリート打設時のストッパーとなる鉛直面を有していること、
下段の斜壁版の頂端背面の鉛直面の背部に、前記の連続部正面の鉛直面が配置されるように、前記台座版の所定位置に予めアンカーボルト挿入孔を開けてあること、
前記台座版のスパン方向の両端と中間部に、レベル調整手段を装備してあること、を特徴とするPC傾斜型枠である。
The technical problem of the present invention is solved by the following means. In claim 1, a horizontal pedestal plate and a slant wall plate in a PC inclined mold used when constructing a slope such as a dam dam body are integrated through a continuous portion, and the oblique dimension is determined from the dimension in the front-rear direction of the pedestal plate. In the structure where the wall plate is high and the dimensions in the front-rear direction are large,
The plate thickness between the vertical surface formed on the front surface of the continuous portion and the vertical surface formed on the back surface is set so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate. The weight and strength are increased by increasing the thickness of the wall and pedestal plates,
The back of the top end of the slanted wall plate has a reference surface when positioning the anchor bolt and a vertical surface serving as a stopper when placing the protective impermeable concrete,
An anchor bolt insertion hole is previously opened at a predetermined position of the pedestal plate so that the vertical surface of the continuous portion front surface is arranged on the back of the vertical surface of the top end back surface of the lower inclined wall plate,
The PC inclined mold is characterized in that level adjustment means are provided at both ends and an intermediate portion in the span direction of the base plate .

このように、ダム堤体などの斜面を施工する際に用いるPC傾斜型枠における水平の台座版と斜壁版が連続部を介して一体となり、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな不安定な構造であるにもかかわらず、前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記連続部の正面に形成した鉛直面と背面に形成した鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあるため、位置決め状態において、前記台座版のスパン方向の両端と中間部のレベル調整手段でレベル調整したり、台座版下面にモルタルを充填する際にPC傾斜型枠が自立可能となる。このようにPC傾斜型枠を用いて、ダム堤体や法面などのような傾斜面を施工する際に、PC型枠を自立可能な構造とすることによって、PC型枠の据え付け作業が簡易化され、しかも簡易な固定だけで、後打ちコンクリートの打設が可能となる。In this way, the horizontal pedestal plate and the slant wall plate in the PC inclined mold used when constructing a slope such as a dam dam body are integrated through a continuous portion, and the slant wall is determined from the dimension in the front-rear direction of the pedestal plate. The front surface of the continuous portion is positioned so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, despite the fact that the plate is high and has an unstable structure with large dimensions in the front-rear direction. Since the plate thickness between the vertical surface formed on the back surface and the vertical surface formed on the back surface is larger than the plate thickness of the slant wall plate and the pedestal plate, the weight and strength are increased. When the level is adjusted by level adjusting means at both ends and the middle of the span direction, or when the mortar is filled on the lower surface of the pedestal plate, the PC inclined mold can be made independent. In this way, when installing inclined surfaces such as dam dams and slopes using PC inclined formwork, the PC formwork can be installed in a self-supporting structure, thereby simplifying the installation work of the PC formwork. In addition, post-cast concrete can be placed only by simple fixing.
また、下段の斜壁版の頂端背面の鉛直面の背部に、前記の連続部正面の鉛直面が配置されるように、前記台座版の所定位置に予めアンカーボルト挿入孔を開けてあるため、斜壁版の頂端背面の鉛直面から規定の位置に予め固定されたアンカーボルトを台座版のアンカーボルト孔に挿入することで、前記の頂端背面(鉛直面)にその上段のPC傾斜型枠の台座版正面の鉛直面が自動的に位置決めされる。In addition, since the vertical surface of the front of the continuous portion is arranged on the back of the vertical surface of the top end back surface of the lower slant wall plate, an anchor bolt insertion hole is previously opened at a predetermined position of the pedestal plate, By inserting anchor bolts, which are fixed in advance from the vertical surface on the back of the top end of the slant wall plate, into the anchor bolt holes of the base plate, the upper PC inclined mold frame is placed on the top end back surface (vertical surface). The vertical plane in front of the pedestal is automatically positioned.
さらに、前記斜壁版の頂端背面には、アンカーボルトの位置決め時の基準面並びに保護遮水コンクリート打設時のストッパーとなる鉛直面を有しているので、背部に保護遮水コンクリートを打設する際の保護遮水コンクリートの圧力によって、PC傾斜型枠が正面側に押し出されるのを防止するストッパーの役目を、下段のコンクリート養生済みのPC傾斜型枠の頂端背面の鉛直面が果たしている。また、アンカーボルトを位置決めする際の基準面となっている。In addition, the back of the top end of the slanted wall plate has a reference surface for positioning the anchor bolts and a vertical surface that serves as a stopper for placing the protective water-impervious concrete. The vertical surface on the back of the top end of the PC-curved mold that has been cured in the lower stage plays the role of a stopper that prevents the PC-graded mold from being pushed out to the front side by the pressure of the protective impermeable concrete. Moreover, it is a reference surface for positioning the anchor bolt.

請求項2は、前記の斜壁版において、前記PC傾斜型枠の重心位置を吊り上げ可能な位置に、着脱可能な吊り金具を仮止め可能となっていることを特徴とする請求項1に記載のPC傾斜型枠である。 According to a second aspect of the present invention, in the slanted wall plate , a detachable hanging bracket can be temporarily fixed at a position where the center of gravity of the PC inclined mold can be lifted. It is a PC inclined formwork.

このように、前記の斜壁版において、前記PC傾斜型枠の重心位置を吊り上げ可能な位置に、着脱可能な吊り金具を仮止め可能となっているため、重機などで吊り金具を用いて吊り上げた際に、PC傾斜型枠の台座版が水平となる。したがって、台座版を平坦な面上に置くだけで、PC傾斜型枠が安定するので、据え付け作業が極めて容易になる。また、吊り金具は、斜壁版に対し着脱可能なため、据え付け完了後は、取り外して、ボルト孔をモルタルで塞ぐことができる。In this way, in the slanted wall plate, the detachable hanging bracket can be temporarily fixed at a position where the center of gravity of the PC inclined mold frame can be lifted. In this case, the base plate of the PC inclined form becomes horizontal. Therefore, the PC inclined mold is stabilized only by placing the pedestal plate on a flat surface, so that the installation work becomes extremely easy. Moreover, since the hanging bracket is detachable from the slanted wall plate, it can be removed and the bolt hole can be closed with mortar after the installation is completed.

請求項3は、アンカーボルトの固定位置を決める治具における水平方向に延びた連結部材の一端に、前記斜壁版の頂端背面の鉛直面に仮止め固定する基準部材を有しており、他端には、アンカーボルトが挿入支持される支持筒を有しているアンカーボルト位置決め治具が、その基準部材によって請求項1または請求項2に記載の斜壁版の頂端背面の鉛直面に仮止め固定されていることを特徴とするPC傾斜型枠である。このように、アンカーボルトの固定位置を決める治具における水平方向に延びた連結部材の一端に、前記斜壁版の頂端背面の鉛直面に仮止め固定する基準部材を有しており、他端には、アンカーボルトが挿入支持される支持筒を有しているアンカーボルト位置決め治具が、その基準部材によって請求項1または請求項2に記載の斜壁版の頂端背面の鉛直面に仮止め固定されているため、据え付け完了したPC傾斜型枠の背部にコンクリート打設した後、当該PC傾斜型枠の斜壁版の頂端背面の鉛直面に、位置決め治具の基準部材を当てて固定し、さらに、他端側の位置決め孔にアンカーボルトを挿入すると共に打設したコンクリート中に挿入し埋め込んだ状態とする。こうして養生し硬化した後に、前記の治具をアンカーボルトおよび斜壁版の頂端背面から取り外すと、前記のアンカーボルトを、上段のPC傾斜型枠を据え付ける際の位置決めに利用できる。なお、前記治具にアンカーボルトを保持させた状態で、背部のコンクリートを打設することも可能であり、順序は限定されない。 According to a third aspect of the present invention, a reference member for temporarily fixing and fixing to the vertical surface of the top end rear surface of the slanted wall plate is provided at one end of the connecting member extending in the horizontal direction in the jig for determining the fixing position of the anchor bolt. An anchor bolt positioning jig having a support cylinder into which the anchor bolt is inserted and supported at the end is temporarily attached to the vertical surface of the top end back surface of the inclined wall plate according to claim 1 or 2 by the reference member. It is a PC inclination type | mold form characterized by stopping and fixing. As described above, one end of the connecting member extending in the horizontal direction in the jig that determines the fixing position of the anchor bolt has a reference member that is temporarily fixed to the vertical surface of the top end back surface of the slant wall plate, and the other end. The anchor bolt positioning jig having a support cylinder into which the anchor bolt is inserted and supported is temporarily fixed to the vertical surface of the top end rear surface of the slant wall plate according to claim 1 or 2 by the reference member. Since it is fixed, after placing concrete on the back of the PC inclined mold that has been installed, fix the reference jig of the positioning jig against the vertical surface of the top end of the inclined wall plate of the PC inclined mold. Further, the anchor bolt is inserted into the positioning hole on the other end side and is inserted and embedded in the placed concrete. When the jig is removed from the anchor bolt and the back of the top end of the slant wall plate after being cured and cured in this way, the anchor bolt can be used for positioning when installing the upper PC inclined formwork. In addition, it is also possible to place the back concrete with the anchor bolt held by the jig, and the order is not limited.

請求項4は、PC傾斜型枠の据え付け状態で隣接台座版間において、CSG部と斜壁版との間で下側の段から上側の段に延ばして来た止水板の被りを確保するために、止水板を避けるための欠除空間を台座版端部に形成してあることを特徴とする請求項1、請求項2または請求項3に記載のPC傾斜型枠である。このように、PC傾斜型枠の据え付け状態で隣接台座版間において、CSG部と斜壁版との間で下側の段から上側の段に延ばして来た止水板の被りを確保するために、止水板を避けるための欠除空間を台座版端部に形成してあるため、PC傾斜型枠を並べて据えつけた状態で止水板を配置して後打ちコンクリート中に埋め込むことができ、しかも止水板に対する被りも十分に確保できる。また、各PC傾斜型枠にこの逃げ空間を確保するには、左右両端に設けることになるが、その結果、PC傾斜型枠の軽量化とコンクリート材料の節減にもなる。 Claim 4 secures the covering of the water stop plate extending from the lower step to the upper step between the CSG part and the inclined wall plate between the adjacent pedestal plates with the PC inclined mold frame installed. Therefore, the PC inclined mold according to claim 1, 2 or 3, wherein a lacking space for avoiding the water stop plate is formed at the end of the base plate. As described above, in order to secure the covering of the water stop plate extending from the lower step to the upper step between the CSG portion and the inclined wall plate between the adjacent pedestal plates with the PC inclined form frame installed. In addition, since the lack space for avoiding the water stop plate is formed at the end of the pedestal plate, the water stop plate can be arranged and embedded in the post-cast concrete with the PC inclined formwork placed side by side. In addition, it is possible to sufficiently secure the covering on the water stop plate. Further, in order to secure this escape space in each PC inclined mold, it is provided at both left and right ends. As a result, the PC inclined mold is reduced in weight and the concrete material is saved.

請求項5は、前記の斜壁版の背面が圧力水のジェット噴射などの手法によって粗面化されていることを特徴とする請求項1から請求項4までのいずれかの項に記載のPC傾斜型枠である。ジェット噴射は、粗面化法の一例である。このように、前記斜壁版の背面がジェット水噴射などの手法によって粗面化されているため、後打ちコンクリートを打設した際に互いに密着して強固に結合されるので、確実に一体化される。 The PC according to any one of claims 1 to 4, wherein a back surface of the slanted wall plate is roughened by a method such as jet injection of pressure water. It is an inclined formwork. Jet injection is an example of a roughening method. In this way, the back of the slanted wall slab is roughened by a method such as jet water injection, so when post-cast concrete is placed, it is tightly bonded to each other, so it is securely integrated Is done.

請求項6は、水平の台座版と一体の斜壁版を有し、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな構造のPC傾斜型枠を多数隣接配置し、しかも前記台座版と斜壁版間の連続部正面の鉛直面を下段の斜壁版の頂端背面の鉛直面の背部に規定位置のアンカーボルトで位置決めした状態で固定してあること、
前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記台座版と斜壁版との連続部の背面にも鉛直面を形成し、この背面の鉛直面と前記の連続部正面の鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあること、
CSG部と自立させて据え付けしたPC傾斜型枠との間の空間部に、後打ちコンクリートとして保護遮水コンクリートを打設してなる構造を、複数段積層施工してなることを特徴とするダム堤体などの斜面の施工構造である。
A sixth aspect of the present invention includes a slant wall plate integrated with a horizontal pedestal plate, and a large number of PC inclined molds having a structure in which the slant wall plate is higher than the front-rear direction dimension of the pedestal plate and the front-rear direction dimension is large. Adjacently, and the vertical surface of the front part of the continuous part between the pedestal plate and the inclined wall plate is fixed to the back of the vertical surface of the top end of the lower inclined wall plate with anchor bolts at a specified position. ,
A vertical surface is also formed on the back surface of the continuous portion of the pedestal plate and the slanted wall plate so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, The plate thickness between the vertical surface of the continuous portion front is larger than the plate thickness of the slanted wall plate and the base plate, and the weight and strength are increased.
A dam characterized in that a structure formed by placing protective water-impervious concrete as post-cast concrete in the space between the CSG section and the PC inclined mold that is installed independently It is a construction structure of slopes such as levee bodies .

このように、水平の台座版と一体の斜壁版を有し、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな自立構造のPC傾斜型枠を多数隣接配置して、後打ちコンクリートを打設してなる構造を、複数回重ねて複数段積層し施工した構造とすることによって、所望の高さのダム堤体などにおける上流側および下流側、あるいはダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。In this way, there are a large number of self-supporting PC inclined molds having a slant wall plate integrated with a horizontal base plate, the slant wall plate being higher than the front and rear direction dimension of the base plate, and having a large front and rear direction size. Adjacently arranged, a structure formed by placing post-cast concrete, and a structure in which a plurality of layers are stacked and constructed, the upstream side and the downstream side in a dam dam body having a desired height, or Normal slopes other than dams can also be realized efficiently, shortening the construction period and reducing costs.
また、前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記台座版と斜壁版との連続部の背面にも鉛直面を形成し、この背面の鉛直面と前記の連続部正面の鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあるため、不安定構造のPC傾斜型枠を自立させることができる。In addition, a vertical surface is formed on the back surface of the continuous portion of the pedestal plate and the slanted wall plate so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, Since the plate thickness between the surface and the vertical surface in front of the continuous portion is larger than the plate thickness of the slant wall plate and the base plate, the weight and strength are increased. Can be independent.
しかも、前記台座版と斜壁版間の連続部正面の鉛直面を下段の斜壁版の頂端背面の鉛直面の背部に規定位置のアンカーボルトで位置決めした状態で固定してあるため、斜壁版の頂端背面が、保護遮水コンクリートの打設時のストッパーとして作用する。加えて、CSG部と自立させて据え付けしたPC傾斜型枠との間の空間部に、後打ちコンクリートとして保護遮水コンクリートを打設してなる構造を、複数段積層施工してなるため、所望の高さのダム堤体やダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。In addition, since the vertical surface in front of the continuous part between the pedestal plate and the inclined wall plate is fixed to the back of the vertical surface on the back of the top end of the lower inclined wall plate with anchor bolts at a predetermined position, the inclined wall is fixed. The back of the top edge of the plate acts as a stopper when placing protective impermeable concrete. In addition, a structure formed by placing protective water-impervious concrete as post-cast concrete in the space between the CSG part and the PC inclined mold that is installed in a self-supporting manner is laminated in multiple stages. It is possible to efficiently realize the dam body with a height of 5mm and normal slopes other than the dam, thereby shortening the construction period and saving costs.

請求項7は、止水板とCSG部との間、並びに止水板と前記斜壁版との間に支持鉄板をそれぞれ立てて、前記CSG部側の支持鉄板と斜壁版側の支持鉄板で止水板を挟持した状態で、CSG部と止水板とその前後の支持鉄板とPC傾斜型枠との間の空間に保護遮水コンクリートを打設することによって前記の保護遮水コンクリートの目地切りの位置を塞ぐための止水板を設けてあることを特徴とする請求項6に記載のダム堤体などの斜面の施工構造である。
大規模なコンクリート構造体の場合、コンクリートの温度応力や経時変化に伴うひび割れは避けられないので、目地切りをしておいて、寸法変化を吸収させるが、請求項7のように、目地切りのために、止水板とCSG部との間、並びに止水板と前記斜壁版との間に支持鉄板をそれぞれ立てて、前後の支持鉄板で止水板を挟持した状態で保護遮水コンクリートを打設することによって、保護遮水コンクリートの目地切りの位置を塞ぐための止水板を設けてあるため、このようにして、下側の段から上側の段に順次延ばして来た止水板を目地切り位置に埋め込んでいくことで、目地切り位置における水漏れ防止が可能となる。
7. The support iron plate on the CSG portion side and the support iron plate on the swash wall plate side are provided with standing support iron plates between the water stop plate and the CSG portion and between the water stop plate and the swash wall plate, respectively. In the state where the water blocking plate is sandwiched between the CSG part, the water blocking plate, the supporting iron plate before and after the water blocking plate, and placing the protective water blocking concrete in the space between the PC inclined formwork, 7. The construction structure of a slope such as a dam dam body according to claim 6, wherein a water stop plate for closing the joint cutting position is provided.
In the case of a large-scale concrete structure, cracks due to temperature stress and changes with time of the concrete are inevitable, so that the dimensional change can be absorbed by cutting the joint. For this purpose, protective iron-impregnated concrete is provided in a state where a support iron plate is erected between the water stop plate and the CSG portion, and between the water stop plate and the slant wall plate, and the water stop plate is sandwiched between the front and rear support iron plates. Since a water stop plate is provided to block the joint cutting position of the protective impermeable concrete, the water stop that has been sequentially extended from the lower step to the upper step in this way. By embedding the plate at the joint cutting position, it is possible to prevent water leakage at the joint cutting position.

請求項8は、互いに隣接するPC傾斜型枠間の隙間をシールするための遮水性のテープを、前記斜壁版の隣接する内面に貼ってあることを特徴とする請求項6または請求項7に記載のダム堤体などの斜面の施工構造である。このように、互いに隣接するPC傾斜型枠間の隙間をシールするための遮水性のテープを、前記斜壁版の隣接する内面に貼ってあるため、複数のPC傾斜型枠を水平ならびに上下方向に並べて多数据え付けて、ダム堤体などの斜面を施工した場合、左右の隣接する斜壁版間の隙間から水漏れしたり、PC傾斜型枠の背面に後打ちコンクリートを打設する際にモルタル分(のろ)が漏れ出すのを防ぐことができる。 The eighth aspect of the present invention is characterized in that a water-impervious tape for sealing a gap between adjacent PC inclined molds is attached to an adjacent inner surface of the slanted wall plate. The construction structure of slopes such as dam dam body described in 1. As described above, since the water-blocking tape for sealing the gap between the adjacent PC inclined molds is attached to the adjacent inner surface of the inclined wall plate, a plurality of PC inclined molds are arranged in the horizontal and vertical directions. When a slope such as a dam dam body is installed in parallel, water leaks from the gap between the left and right adjacent sloping wall slabs, or when mortar is placed on the back of the PC inclined formwork The minute can be prevented from leaking out.

請求項9は、水平の台座版と斜壁版間の連続部正面と斜壁版の頂端背面に鉛直面をそれぞれ有するPC傾斜型枠を隣接配置した状態で、
下段のPC傾斜型枠の斜壁版の頂端背面の鉛直面を基準にして、治具を用いて位置決めしたアンカーボルトを下段の保護遮水コンクリート中に挿入し、
この保護遮水コンクリートが硬化した後に、前記の治具を除去して、前記のアンカーボルトを上段のPC傾斜型枠の台座版のアンカーボルト孔に挿入することによって、前記の下段の斜壁版の頂端背面の鉛直面の背部に台座版正面の鉛直面を配置した状態で、
前記台座版に設けたレベル調整手段でレベル調整してから、アンカーボルトにナット締めして固定し、
上段のPC傾斜型枠とCSG部との間に保護遮水コンクリートを打設することを特徴とするPC傾斜型枠を用いた斜面部の施工方法である。
Claim 9 is a state in which PC inclined molds each having a vertical plane on the front surface of the continuous portion between the horizontal base plate and the slant wall plate and the top end back surface of the slant wall plate are arranged adjacently,
Insert the anchor bolts positioned using a jig into the lower protective water-impervious concrete with reference to the vertical plane of the top end of the slant wall plate of the lower PC inclined formwork,
After the protective impermeable concrete is hardened, the lower jig wall is removed by removing the jig and inserting the anchor bolt into the anchor bolt hole of the base plate of the upper PC inclined mold frame. With the vertical plane in front of the base plate placed behind the vertical plane at the back of the top edge of
After adjusting the level with the level adjusting means provided on the pedestal plate, tighten the nut to the anchor bolt and fix it,
A method for constructing a slope portion using a PC inclined mold frame, characterized in that protective water-impervious concrete is placed between an upper PC inclined mold frame and a CSG portion .

このように、水平の台座版と斜壁版間の連続部正面と斜壁版の頂端背面に鉛直面をそれぞれ有するPC傾斜型枠を隣接配置した状態で、下段のPC傾斜型枠の斜壁版の頂端背面の鉛直面を基準にして、治具を用いて位置決めしたアンカーボルトを下段の保護遮水コンクリート中に挿入し、この保護遮水コンクリートが硬化した後に、前記の治具を除去するので、治具を除去した後に、前記アンカーボルトを上段のPC傾斜型枠の台座版のアンカーボルト孔に挿入することによって、前記の下段の斜壁版の頂端背面の鉛直面の背部に台座版正面の鉛直面を接触させることなしに、自動的に位置決め配置できる。そして、この位置決め後に、前記台座版に設けたレベル調整手段でレベル調整してから、アンカーボルトにナット締めして固定した状態で、上段のPC傾斜型枠とCSG部との間に保護遮水コンクリートを打設するので、PC傾斜型枠を積層するたびに、下段のPC傾斜型枠を基準にして位置決めしレベル調整することになり、背部の保護遮水コンクリートを打設する際の保護遮水コンクリートの圧力によって、PC傾斜型枠が正面側に押し出されるのを防止するストッパーの役目も頂端内面が兼ねるので、位置精度の高いPC傾斜型枠式堤体が実現でき、所望の高さのダム堤体やダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。In this manner, the inclined wall of the lower PC inclined mold frame in the state in which the PC inclined mold frame having the vertical surface is adjacently disposed on the front surface of the continuous portion between the horizontal pedestal plate and the inclined wall plate and the top end rear surface of the inclined wall plate. Insert the anchor bolt positioned using the jig with reference to the vertical surface at the back of the top end of the plate into the lower protective impermeable concrete, and after the protective impermeable concrete has hardened, remove the jig Therefore, after removing the jig, the anchor bolt is inserted into the anchor bolt hole of the base plate of the upper PC inclined mold frame, so that the base plate is placed on the back of the vertical surface on the back of the top end of the lower slant wall plate. Positioning and positioning can be performed automatically without bringing the front vertical surface into contact. Then, after this positioning, the level is adjusted by the level adjusting means provided on the pedestal plate, and then protected by a protective water shielding between the upper PC inclined formwork and the CSG portion in a state where the anchor bolt is fastened with a nut and fixed. Since concrete is placed, each time the PC inclined formwork is stacked, positioning and level adjustment are performed with reference to the lower PC inclined formwork. The top inner surface also serves as a stopper to prevent the PC inclined form from being pushed out to the front side due to the pressure of water concrete, so a PC inclined form type levee body with high positional accuracy can be realized, and a desired height can be achieved. The dam body and normal slope other than the dam can also be efficiently realized, and the construction period and cost can be reduced.

請求項10は、レベル調整後の前記台座版の下の隙間にモルタルを流し込んで充填することを特徴とする請求項9に記載のPC傾斜型枠を用いた斜面部の施工方法である。このように、レベル調整後の前記台座版の下の隙間にモルタルを流し込んで充填するので、モルタルが硬化した後は、せっかくのレベル調整が狂う恐れはない。A tenth aspect of the present invention is the construction method of the slope portion using the PC inclined mold according to the ninth aspect, wherein the mortar is poured and filled in the gap under the pedestal plate after the level adjustment. Thus, since the mortar is poured and filled in the gap under the pedestal plate after the level adjustment, there is no fear that the level adjustment will go wrong after the mortar is cured.

請求項1のように、ダム堤体などの斜面を施工する際に用いるPC傾斜型枠における水平の台座版と斜壁版が連続部を介して一体となり、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな不安定な構造であるにもかかわらず、前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記連続部の正面に形成した鉛直面と背面に形成した鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあるため、位置決め状態において、前記台座版のスパン方向の両端と中間部のレベル調整手段でレベル調整したり、台座版下面にモルタルを充填する際にPC傾斜型枠が自立可能となる。このようにPC傾斜型枠を用いて、ダム堤体や法面などのような傾斜面を施工する際に、PC型枠を自立可能な構造とすることによって、PC型枠の据え付け作業が簡易化され、しかも簡易な固定だけで、後打ちコンクリートの打設が可能となる。As in claim 1, the horizontal pedestal plate and the slant wall plate in the PC inclined form used when constructing a slope such as a dam dam body are integrated through a continuous portion, and the dimension in the front-rear direction of the pedestal plate is The continuous wall plate is positioned so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, despite the fact that the slant wall plate is high and has an unstable structure with large dimensions in the front-rear direction. Since the plate thickness between the vertical surface formed on the front surface of the part and the vertical surface formed on the back surface is larger than the plate thickness of the inclined wall plate and the pedestal plate, the weight and strength are increased. When the level is adjusted by the level adjusting means at both ends and the middle part of the span plate of the pedestal plate, or when the mortar is filled on the lower surface of the pedestal plate, the PC inclined mold can be self-supported. In this way, when installing inclined surfaces such as dam dams and slopes using PC inclined formwork, the PC formwork can be installed in a self-supporting structure, thereby simplifying the installation work of the PC formwork. In addition, post-cast concrete can be placed only by simple fixing.
また、下段の斜壁版の頂端背面の鉛直面の背部に、前記の連続部正面の鉛直面が配置されるように、前記台座版の所定位置に予めアンカーボルト挿入孔を開けてあるため、斜壁版の頂端背面の鉛直面から規定の位置に予め固定されたアンカーボルトを台座版のアンカーボルト孔に挿入することで、前記の頂端背面(鉛直面)にその上段のPC傾斜型枠の台座版正面の鉛直面が自動的に位置決めされる。In addition, since the vertical surface of the front of the continuous portion is arranged on the back of the vertical surface of the top end back surface of the lower slant wall plate, an anchor bolt insertion hole is previously opened at a predetermined position of the pedestal plate, By inserting anchor bolts, which are fixed in advance from the vertical surface on the back of the top end of the slant wall plate, into the anchor bolt holes of the base plate, the upper PC inclined mold frame is placed on the top end back surface (vertical surface). The vertical plane in front of the pedestal is automatically positioned.
さらに、前記斜壁版の頂端背面には、アンカーボルトの位置決め時の基準面並びに保護遮水コンクリート打設時のストッパーとなる鉛直面を有しているので、背部に保護遮水コンクリートを打設する際の保護遮水コンクリートの圧力によって、PC傾斜型枠が正面側に押し出されるのを防止するストッパーの役目を、下段のコンクリート養生済みのPC傾斜型枠の頂端背面の鉛直面が果たしている。また、アンカーボルトを位置決めする際の基準面となっている。In addition, the back of the top end of the slanted wall plate has a reference surface for positioning the anchor bolts and a vertical surface that serves as a stopper for placing the protective water-impervious concrete. The vertical surface on the back of the top end of the PC-curved mold that has been cured in the lower stage plays the role of a stopper that prevents the PC-graded mold from being pushed out to the front side by the pressure of the protective impermeable concrete. Moreover, it is a reference surface for positioning the anchor bolt.

請求項2のように、前記の斜壁版において、前記PC傾斜型枠の重心位置を吊り上げ可能な位置に、着脱可能な吊り金具を仮止め可能となっているため、重機などで吊り金具を用いて吊り上げた際に、PC傾斜型枠の台座版が水平となる。したがって、台座版を平坦な面上に置くだけで、PC傾斜型枠が安定するので、据え付け作業が極めて容易になる。また、吊り金具は、斜壁版に対し着脱可能なため、据え付け完了後は、取り外して、ボルト孔をモルタルで塞ぐことができる。As described in claim 2, in the slanted wall plate, the detachable hanging bracket can be temporarily fixed at a position where the center of gravity of the PC inclined mold frame can be lifted. When it is used and lifted, the base plate of the PC inclined mold becomes horizontal. Therefore, the PC inclined mold is stabilized only by placing the pedestal plate on a flat surface, so that the installation work becomes extremely easy. Moreover, since the hanging bracket is detachable from the slanted wall plate, it can be removed and the bolt hole can be closed with mortar after the installation is completed.

請求項3のように、アンカーボルトの固定位置を決める治具における水平方向に延びた連結部材の一端に、前記斜壁版の頂端背面の鉛直面に仮止め固定する基準部材を有しており、他端には、アンカーボルトが挿入支持される支持筒を有しているアンカーボルト位置決め治具が、その基準部材によって請求項1または請求項2に記載の斜壁版の頂端背面の鉛直面に仮止め固定されているため、据え付け完了したPC傾斜型枠の背部にコンクリート打設した後、当該PC傾斜型枠の斜壁版の頂端背面の鉛直面に、位置決め治具の基準部材を当てて固定し、さらに、他端側の位置決め孔にアンカーボルトを挿入すると共に打設したコンクリート中に挿入し埋め込んだ状態とする。こうして養生し硬化した後に、前記の治具をアンカーボルトおよび斜壁版の頂端背面から取り外すと、前記のアンカーボルトを、上段のPC傾斜型枠を据え付ける際の位置決めに利用できる。なお、前記治具にアンカーボルトを保持させた状態で、背部のコンクリートを打設することも可能であり、順序は限定されない。 Good sea urchin of claim 3, the one end of the connecting member extending in the horizontal direction of the jig to determine the fixing position of the anchor bolt has a reference member for temporarily fixed to the vertical surface of the top end back surface of the swash wall plate An anchor bolt positioning jig having a support cylinder into which the anchor bolt is inserted and supported at the other end is a vertical surface of the back surface of the top end of the inclined wall plate according to claim 1 or 2, depending on the reference member. After the concrete is placed on the back of the PC inclined mold that has been installed, the reference member of the positioning jig is applied to the vertical surface of the top end of the inclined wall plate of the PC inclined mold. In addition, the anchor bolt is inserted into the positioning hole on the other end side, and is inserted into the cast concrete and embedded. When the jig is removed from the anchor bolt and the back of the top end of the slant wall plate after being cured and cured in this way, the anchor bolt can be used for positioning when installing the upper PC inclined formwork. In addition, it is also possible to place the back concrete with the anchor bolt held by the jig, and the order is not limited.

請求項4のように、PC傾斜型枠の据え付け状態で隣接台座版間において、CSG部と斜壁版との間で下側の段から上側の段に延ばして来た止水板の被りを確保するために、止水板を避けるための欠除空間を台座版端部に形成してあるため、PC傾斜型枠を並べて据えつけた状態で止水板を配置して後打ちコンクリート中に埋め込むことができ、しかも止水板に対する被りも十分に確保できる。また、各PC傾斜型枠にこの逃げ空間を確保するには、左右両端に設けることになるが、その結果、PC傾斜型枠の軽量化とコンクリート材料の節減にもなる。As in claim 4, the cover of the water stop plate extending from the lower stage to the upper stage between the CSG part and the inclined wall plate between the adjacent pedestal plates with the PC inclined mold frame installed. In order to ensure, a lacking space to avoid the water stop plate is formed at the end of the pedestal plate, so the water stop plate is placed in the post-cast concrete with the PC inclined formwork placed side by side In addition, it is possible to sufficiently cover the water stop plate. Further, in order to secure this escape space in each PC inclined mold, it is provided at both left and right ends. As a result, the PC inclined mold is reduced in weight and the concrete material is saved.

請求項5のように、前記斜壁版の背面がジェット水噴射などの手法によって粗面化されているため、後打ちコンクリートを打設した際に互いに密着して強固に結合されるので、確実に一体化される。 Since the back surface of the slanted wall plate is roughened by a method such as jet water injection as in claim 5, since it is closely bonded to each other when post-cast concrete is placed, Integrated into

請求項6のように、水平の台座版と一体の斜壁版を有し、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな自立構造のPC傾斜型枠を多数隣接配置して、後打ちコンクリートを打設してなる構造を、複数回重ねて積層し施工した構造とすることによって、所望の高さのダム堤体あるいはダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。6. A self-standing PC inclined type having a slant wall plate integrated with a horizontal pedestal plate, the slant wall plate being higher than the front-rear direction dimension of the pedestal plate, and having a large front-rear direction size. Ordinary slopes other than dam dam bodies or dams of desired height by making a structure in which a number of frames are arranged adjacent to each other and a structure in which post-cast concrete is laid is laminated and constructed several times. Can also be realized efficiently, shortening the construction period and reducing costs.
また、前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記台座版と斜壁版との連続部の背面にも鉛直面を形成し、この背面の鉛直面と前記の連続部正面の鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあるため、不安定構造のPC傾斜型枠を自立させることができる。In addition, a vertical surface is formed on the back surface of the continuous portion of the pedestal plate and the slanted wall plate so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, Since the plate thickness between the surface and the vertical surface in front of the continuous portion is larger than the plate thickness of the slant wall plate and the base plate, the weight and strength are increased. Can be independent.
しかも、前記台座版と斜壁版間の連続部正面の鉛直面を下段の斜壁版の頂端背面の鉛直面の背部に規定位置のアンカーボルトで位置決めした状態で固定してあるため、斜壁版の頂端背面が、保護遮水コンクリートの打設時のストッパーとして作用する。加えて、CSG部と自立させて据え付けしたPC傾斜型枠との間の空間部に、後打ちコンクリートとして保護遮水コンクリートを打設してなる構造を、複数段積層施工してなるため、所望の高さのダム堤体やダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。  In addition, since the vertical surface in front of the continuous part between the pedestal plate and the inclined wall plate is fixed to the back of the vertical surface on the back of the top end of the lower inclined wall plate with anchor bolts at a predetermined position, the inclined wall is fixed. The back of the top edge of the plate acts as a stopper when placing protective impermeable concrete. In addition, a structure formed by placing protective water-impervious concrete as post-cast concrete in the space between the CSG part and the PC inclined mold that is installed in a self-supporting manner is laminated in multiple stages. It is possible to efficiently realize the dam body with a height of 5mm and normal slopes other than the dam, thereby shortening the construction period and saving costs.

大規模なコンクリート構造体の場合、コンクリートの温度応力や経時変化に伴うひび割れは避けられないので、目地切りをしておいて、寸法変化を吸収させるが、請求項7のように、目地切りのために、止水板とCSG部との間、並びに止水板と前記斜壁版との間に支持鉄板をそれぞれ立てて、前後の支持鉄板で止水板を挟持した状態で保護遮水コンクリートを打設することによって、保護遮水コンクリートの目地切りの位置を塞ぐための止水板を設けてあるため、このようにして、下側の段から上側の段に順次延ばして来た止水板を目地切り位置に埋め込んでいくことで、目地切り位置における水漏れ防止が可能となる。In the case of a large-scale concrete structure, cracks due to temperature stress and changes with time of the concrete are inevitable, so that the dimensional change can be absorbed by cutting the joint. For this purpose, protective iron-impregnated concrete is provided in a state where a support iron plate is erected between the water stop plate and the CSG portion, and between the water stop plate and the slant wall plate, and the water stop plate is sandwiched between the front and rear support iron plates. Since a water stop plate is provided to block the joint cutting position of the protective impermeable concrete, the water stop that has been sequentially extended from the lower step to the upper step in this way. By embedding the plate at the joint cutting position, it is possible to prevent water leakage at the joint cutting position.

請求項8のように、互いに隣接するPC傾斜型枠間の隙間をシールするための遮水性のテープを、前記斜壁版の隣接する内面に貼ってあるため、複数のPC傾斜型枠を水平ならびに上下方向に並べて多数据え付けて、ダム堤体などの斜面を施工した場合、左右の隣接する斜壁版間の隙間から水漏れしたり、PC傾斜型枠の背面に後打ちコンクリートを打設する際にモルタル分(のろ)が漏れ出すのを防ぐことができる。 Good sea urchin of claim 8, the tape water barrier for sealing a gap between PC inclined frame adjacent to each other, because that is affixed to the adjacent inner surface of the swash wall plate, horizontal multiple PC Slope Panel In addition, when slopes such as dam dam bodies are installed side by side in the vertical direction, water leaks from the gap between the left and right adjacent slant wall slabs, or post-cast concrete is placed on the back of the PC inclined formwork At this time, it is possible to prevent leakage of mortar content.

請求項9のように、水平の台座版と斜壁版間の連続部正面と斜壁版の頂端背面に鉛直面をそれぞれ有するPC傾斜型枠を隣接配置した状態で、下段のPC傾斜型枠の斜壁版の頂端背面の鉛直面を基準にして、治具を用いて位置決めしたアンカーボルトを下段の保護遮水コンクリート中に挿入し、この保護遮水コンクリートが硬化した後に、前記の治具を除去するので、治具を除去した後に、前記アンカーボルトを上段のPC傾斜型枠の台座版のアンカーボルト孔に挿入することによって、前記の下段の斜壁版の頂端背面の鉛直面の背部に台座版正面の鉛直面を接触させることなしに、自動的に位置決め配置できる。そして、この位置決め後に、前記台座版に設けたレベル調整手段でレベル調整してから、アンカーボルトにナット締めして固定した状態で、上段のPC傾斜型枠とCSG部との間に保護遮水コンクリートを打設するので、PC傾斜型枠を積層するたびに、下段のPC傾斜型枠を基準にして位置決めしレベル調整することになり、背部の保護遮水コンクリートを打設する際の保護遮水コンクリートの圧力によって、PC傾斜型枠が正面側に押し出されるのを防止するストッパーの役目も頂端内面が兼ねるので、位置精度の高いPC傾斜型枠式堤体が実現でき、所望の高さのダム堤体やダム以外の通常の法面なども効率的に実現でき、施工期間の短縮と経費節減が実現される。The lower PC inclined form in a state where the PC inclined form having a vertical surface is adjacently disposed on the front surface of the continuous portion between the horizontal base plate and the inclined wall plate and the back of the top end of the inclined wall plate as in claim 9. After inserting the anchor bolts positioned using the jig with reference to the vertical plane at the back of the top end of the slanted wall plate in the protective water-impervious concrete in the lower stage, After removing the jig, the anchor bolt is inserted into the anchor bolt hole of the pedestal plate of the upper PC inclined mold frame, so that the back portion of the vertical surface on the back of the top end of the lower swash wall plate is removed. It is possible to position and arrange automatically without bringing the vertical surface in front of the pedestal plate into contact with each other. Then, after this positioning, the level is adjusted by the level adjusting means provided on the pedestal plate, and then protected by a protective water shielding between the upper PC inclined formwork and the CSG portion in a state where the anchor bolt is fastened with a nut and fixed. Since concrete is placed, each time the PC inclined formwork is stacked, positioning and level adjustment are performed with reference to the lower PC inclined formwork. The top inner surface also serves as a stopper to prevent the PC inclined form from being pushed out to the front side due to the pressure of water concrete, so a PC inclined form type levee body with high positional accuracy can be realized, and a desired height can be achieved. The dam body and normal slope other than the dam can also be efficiently realized, and the construction period and cost can be reduced.


請求項10のように、レベル調整後の前記台座版の下の隙間にモルタルを流し込んで充填するので、モルタルが硬化した後は、せっかくのレベル調整が狂う恐れはない。Since the mortar is poured and filled in the gap under the pedestal plate after the level adjustment as in the tenth aspect, after the mortar is hardened, there is no fear that the level adjustment will go wrong.

次に本発明によるダム施工用PC傾斜型枠とこのPC傾斜型枠を用いた施工方法が実際上どのように具体化されるか実施形態を説明する。図1は、本発明によるダム堤体の斜面施工方法を説明する縦断面図である。本発明の実施形態では、ダム堤体の内部には、CSGを採用している。通常のコンクリートダムは三角形の断面をしているが、台形断面とすることにより、コンクリートより品質は劣るがコストが安価なCSG(Cemented Sand and Gravel)を用いることができる。 Next, an embodiment of how the PC inclined mold for dam construction and the construction method using the PC inclined mold according to the present invention are actually realized will be described. FIG. 1 is a longitudinal sectional view explaining a slope construction method for a dam dam body according to the present invention. In the embodiment of the present invention, CSG is adopted inside the dam dam body. Ordinary concrete dams have a triangular cross section, but by using a trapezoidal cross section, it is possible to use CSG (Cemented Sand and Gravel), which is inferior to concrete but less expensive.

図1においては、まず最初のCSG1を1リフト分打設する。次いで、基礎コンクリート1上において、測量した所定の位置に、最初のPC傾斜型枠2を位置決めし据え付ける。このとき、基礎コンクリート1が硬化しないうちに、アンカーボルト3aを位置決めして挿入・埋設しておき、基礎コンクリート1が硬化してから、最初のPC傾斜型枠2を据え付ける。このとき、PC傾斜型枠2の台座版4に開けてあるボルト孔にアンカーボルト3aが入るように位置決めする。そして、ナット締めして、アンカーボルト3aにPC傾斜型枠2を固定してから、背部に保護遮水コンクリート5aを打設し、CSG1との間の空間を保護遮水コンクリート5aで埋める。 In FIG. 1, the first CSG 1 is placed for one lift. Next, the first PC inclined mold 2 is positioned and installed at the predetermined measured position on the foundation concrete 1. At this time, before the foundation concrete 1 is hardened, the anchor bolts 3a are positioned, inserted and buried, and after the foundation concrete 1 is hardened, the first PC inclined mold 2 is installed. At this time, it positions so that the anchor bolt 3a may enter into the bolt hole opened in the base plate 4 of the PC inclination type | mold form 2. FIG. Then, after tightening the nut and fixing the PC inclined mold 2 to the anchor bolt 3a, the protective water-impervious concrete 5a is placed on the back, and the space between the CSG 1 is filled with the protective water-impervious concrete 5a.

次に、前記のCSG1の上に、次の層のCSG2を打設した後、このCSG2と前記のPC傾斜型枠2との間に保護遮水コンクリート5bを打設する。このとき、保護遮水コンクリート5bの上面を水平に均すと共に、PC傾斜型枠2の頂端内面を基準にして、治具でアンカーボルト3bを位置決めして保護遮水コンクリート5b中に挿入して埋め込む。このとき、CSG3を打設しておく。そして、この保護遮水コンクリート5bが硬化してから、前記のアンカーボルト3bが台座版のボルト孔に入るように、第2段目のPC傾斜型枠2を据え付ける。そして、レベル調整手段6で水平度を調整し、アンカーボルトのナットを締めて台座版を固定してから、台座版の下にモルタルを流し込む。そして、CSG3と第2段目のPC傾斜型枠2との間の空間に保護遮水コンクリート5cを打設する。なお、PC傾斜型枠2の据え付けには、吊り金具7を利用してクレーンで吊り上げて位置決めするが、据え付け後には、吊り金具7を取り外すと共に、ボルト孔はモルタルで埋める。以上のように、CSGとPC傾斜型枠と保護遮水コンクリートを順次積層し施工していくという作業を繰り返すことによって、所要の高さまで斜面を形成していく。 Next, after the CSG 2 of the next layer is placed on the CSG 1, the protective water-impervious concrete 5 b is placed between the CSG 2 and the PC inclined mold 2. At this time, the upper surface of the protective impermeable concrete 5b is leveled horizontally, and the anchor bolt 3b is positioned with a jig and inserted into the protective impermeable concrete 5b with reference to the inner surface of the top end of the PC inclined mold frame 2. Embed. At this time, CSG 3 is placed. Then, after the protective water-impervious concrete 5b is cured, the second-stage PC inclined frame 2 is installed so that the anchor bolt 3b enters the bolt hole of the base plate. Then, the level adjustment means 6 adjusts the level, the nut of the anchor bolt is tightened to fix the base plate, and then the mortar is poured under the base plate. Then, the protective water-impervious concrete 5c is placed in the space between the CSG 3 and the second-stage PC inclined mold 2. The PC inclined mold 2 is installed by lifting it with a crane using the hanging metal fitting 7 and positioning it. After the installation, the hanging metal fitting 7 is removed and the bolt hole is filled with mortar. As described above, the slope is formed to a required height by repeating the work of sequentially laminating and constructing CSG, PC inclined formwork and protective impermeable concrete.

図2は、図1の第2段目のPC傾斜型枠2とその関連構成の詳細を示す図3B−B断面図であり、図2において右側が正面側であり、左側が背面側である。図3はPC傾斜型枠2の背面図(底版部のみ図4のC−C断面図)であり、図4は図3におけるA−A位置の断面図である。PC傾斜型枠2は、下端に形成した水平の平板状の台座版4と連続部8と平板状の斜壁版9とが一体にプレキャスト成型されている。前記の連続部8の正面側は鉛直面8aになっており、背面側は鉛直面8bになっている。また、斜壁版9の頂端9tの内面側9tbが鉛直面となっている。頂端9tの上面は水平面になっている。 FIG. 2 is a cross-sectional view of FIG. 3B-B showing details of the second-stage PC inclined mold 2 in FIG. 1 and its related configuration. In FIG. 2, the right side is the front side and the left side is the back side. . 3 is a rear view of the PC inclined mold 2 (only the bottom plate portion is a cross-sectional view taken along the line CC in FIG. 4), and FIG. 4 is a cross-sectional view taken along the line AA in FIG. In the PC inclined mold 2, a horizontal flat plate base plate 4 formed at the lower end, a continuous portion 8, and a flat plate-shaped inclined wall plate 9 are integrally precast. The front side of the continuous portion 8 is a vertical surface 8a, and the back side is a vertical surface 8b. Further, the inner surface side 9tb of the top end 9t of the inclined wall plate 9 is a vertical surface. The top surface of the top end 9t is a horizontal plane.

前記の斜壁版9の厚さは例えば10cmであり、台座版4の厚さは12cmである。また、連続部8の厚さは21cmであり、斜壁版9や台座版4より版厚を厚くすることによって、台座版4と斜壁版9との連続部8を強化すると共に、重量を大きくして、PC傾斜型枠全体の重心位置Wが台座版4の平面領域内に位置するように設定している。図示例の重心位置Wは、台座版内端から34cm、正面から21cmの位置に有る。そして、前記の吊り金具7は、クレーンなどで吊り上げた場合、重心位置Wが中心となるように吊り上げ可能な位置に着脱可能に装着してある。すなわち、図3の左右2箇所のボルト孔7h、7hからも明らかなように、左右2箇所に吊り金具7を取付けてあるが、この2箇所の吊り金具7・7を吊り上げた際に、丁度中間点9aが重心の位置と一致するようになっている。また、吊り金具7・7の高さ方向の位置は、吊り下げ孔が丁度、重心点Wの真上に来るように設定してある。なお、PC傾斜型枠2の左右方向すなわちスパン方向の寸法は、例えば299.5cmである。 The thickness of the slanted wall plate 9 is, for example, 10 cm, and the thickness of the base plate 4 is 12 cm. Further, the thickness of the continuous portion 8 is 21 cm, and by increasing the plate thickness from the inclined wall plate 9 and the pedestal plate 4, the continuous portion 8 between the pedestal plate 4 and the inclined wall plate 9 is strengthened and the weight is increased. The center of gravity W of the entire PC inclined mold is set so as to be located within the plane area of the base plate 4. The center-of-gravity position W in the illustrated example is 34 cm from the inner end of the base plate and 21 cm from the front. And when the said lifting metal fitting 7 is lifted with a crane etc., it attaches | detaches to the position which can be lifted so that the gravity center position W may become a center. That is, as is apparent from the two bolt holes 7h and 7h on the left and right in FIG. 3, the hanging metal fittings 7 are attached to the left and right two places, but when the two hanging metal fittings 7 and 7 are lifted, The intermediate point 9a coincides with the position of the center of gravity. Further, the height direction position of the suspension fittings 7 and 7 is set so that the suspension hole is just above the center of gravity W. In addition, the dimension of the left-right direction, ie, the span direction, of the PC inclined form frame 2 is, for example, 299.5 cm.

前記のレベル調整手段6は、図4のように、台座版4において、前記の丁度中間点9aとスパン方向の両端付近に取付けてある。そして、中間位置のレベル調整手段6は台座版4の背面寄りに位置しているのに対し、両端のレベル調整手段6・6は、前記の厚肉の連続部8内に設けてある。すなわち、図2〜図4のように、レベル調整手段6を逃げるような凹室10を形成してある。そして、この凹室10中で、スパナなどを挿入して、レベル調整できる。以上のように、レベル調整手段6は、2等辺3角形上の3点に設けてあるので、PC傾斜型枠全体を正確にレベル調整できる。 As shown in FIG. 4, the level adjusting means 6 is attached to the base plate 4 just near the intermediate point 9a and both ends in the span direction. The level adjusting means 6 at the intermediate position is located closer to the back surface of the base plate 4, whereas the level adjusting means 6, 6 at both ends are provided in the thick continuous portion 8. That is, as shown in FIGS. 2 to 4, a recessed chamber 10 is formed so as to escape the level adjusting means 6. Then, a level can be adjusted by inserting a spanner or the like in the concave chamber 10. As described above, since the level adjusting means 6 is provided at three points on the isosceles triangle, the level of the entire PC inclined mold can be adjusted accurately.

前記のアンカーボルト3bを挿入するボルト孔11は、前記の両端のレベル調整手段6・6の位置を背部に延長した位置に開けてある。上段のPC傾斜型枠の据え付けに際しては、その台座版4のボルト孔11中に、下段の保護遮水コンクリート5b中に埋め込み固定されているアンカーボルト3bが入るように位置合わせする。そして、該PC傾斜型枠のレベル調整などが完了した後は、アンカーボルト3bとボルト孔11との間の隙間にモルタルを充填してからナット3Nで締めつけ固定する。 The bolt holes 11 into which the anchor bolts 3b are inserted are opened at positions where the positions of the level adjusting means 6 and 6 at both ends are extended to the back. When installing the upper PC inclined formwork, alignment is performed so that the anchor bolt 3 b embedded and fixed in the lower protective water-impervious concrete 5 b is inserted into the bolt hole 11 of the base plate 4. After the level adjustment of the PC inclined mold is completed, the gap between the anchor bolt 3b and the bolt hole 11 is filled with mortar, and then tightened and fixed with the nut 3N.

前記のように、アンカーボルトに合わせてPC傾斜型枠を位置決めするので、アンカーボルトを埋め込み固定する際には、その設置位置を正確に位置決めする必要がある。図2、図3では、このようにアンカーボルトの位置を決定する治具12が斜壁版9の頂端内面9tbに取付けられている。この治具12の他端には、アンカーボルトを挿入支持する支持筒13を固定してあるので、保護遮水コンクリート5dが硬化しないうちに、支持筒13中にアンカーボルト3cを挿通し、下側の保護遮水コンクリート5d中に差し込んで埋め込むと、斜壁版の頂端内面9tbを基準とした正確な位置にアンカーボルト3cが設置されたことになる。そして、保護遮水コンクリート5dが硬化してから、治具12を取り外し、アンカーボルト3cを利用して、次の段のPC傾斜型枠を据え付ける。なお、アンカーボルト3cをセットした後に、下側の保護遮水コンクリート5dを打設してもよい。 As described above, the PC inclined mold is positioned in accordance with the anchor bolt. Therefore, when the anchor bolt is embedded and fixed, it is necessary to accurately position the installation position. 2 and 3, the jig 12 for determining the position of the anchor bolt is attached to the top inner surface 9tb of the inclined wall plate 9 in this way. Since the support cylinder 13 for inserting and supporting the anchor bolt is fixed to the other end of the jig 12, the anchor bolt 3c is inserted into the support cylinder 13 before the protective impermeable concrete 5d is cured. When inserted and embedded in the protective water-impervious concrete 5d on the side, the anchor bolt 3c is installed at an accurate position with respect to the top end inner surface 9tb of the slant wall plate. Then, after the protective water-impervious concrete 5d is cured, the jig 12 is removed, and the next-stage PC inclined mold is installed using the anchor bolt 3c. In addition, after setting the anchor bolt 3c, the lower protective water-impervious concrete 5d may be placed.

図5は治具12の詳細を示す図で、(1)は平面図、(2)は側面図、(3)は正面図である。この治具12は、水平方向に延びたC型鋼からなる連結部材12jの一端に、PC傾斜型枠の斜壁版9の頂端9tの鉛直の内面側9tbに仮止め固定する基準板14を鉛直状態に固定してある。また、他端上には、アンカーボルトを挿入支持する支持筒13を鉛直状態に立てて固定してある。そして、この支持筒13には、内部に挿入されているアンカーボルトを固定するために、蝶ボルト15を螺合させてある。 FIG. 5 is a diagram showing details of the jig 12, wherein (1) is a plan view, (2) is a side view, and (3) is a front view. The jig 12 has a reference plate 14 vertically fixed to a vertical inner surface 9tb of a top end 9t of a slant wall plate 9 of a PC inclined mold frame at one end of a connecting member 12j made of C-shaped steel extending in a horizontal direction. It is fixed to the state. On the other end, a support cylinder 13 for inserting and supporting anchor bolts is fixed in a vertical state. The support cylinder 13 is screwed with a butterfly bolt 15 in order to fix an anchor bolt inserted therein.

この治具12の使用に際しては、図2の保護遮水コンクリート5dの打設後に、PC傾斜型枠の斜壁版9の頂端9tの鉛直面9tbに基準板14をボルト孔16を利用してボルト止めする。そして、他端の支持筒13の中にアンカーボルト3cを挿通すると共に下段の保護遮水コンクリート5d中に打ち込んで埋設すると、前記の斜壁版鉛直面9tbから一定の位置にアンカーボルト3cが設置されたことになる。そして、下段の保護遮水コンクリート5dが硬化してから、治具12を取り外して、上段のPC傾斜型枠を据え付ける。 When the jig 12 is used, the reference plate 14 is used on the vertical surface 9tb of the top end 9t of the inclined wall slab 9 of the PC inclined mold using the bolt holes 16 after the protective water-impervious concrete 5d shown in FIG. Use bolts. Then, when the anchor bolt 3c is inserted into the support cylinder 13 at the other end and is embedded in the lower protective water-impervious concrete 5d, the anchor bolt 3c is installed at a certain position from the inclined wall plate vertical surface 9tb. It will be done. Then, after the lower protective water-impervious concrete 5d is hardened, the jig 12 is removed and the upper PC inclined mold is installed.

このPC傾斜型枠の据え付け方を図2のPC傾斜型枠2について説明すると、まずレベル調整手段6の下に鉄板21を敷いた状態で、レベル調整する。図示のレベル調整手段6は、台座版4中にメネジ筒を埋め込んだ構成になっているので、このメネジ筒に螺合させたレベル調整ボルト6bを回転操作することによって、台座版4を上下させてレベル調整できる。レベル調整の後、アンカーボルトをナット締めして固定してから、台座版4の下の隙間にモルタル22を流し込んで充填する。その後、CSG部との間に保護遮水コンクリート5c、5dを打設するが、各PC傾斜型枠の連続部8の正面が、治具の取付け基準面となった、下段のPC傾斜型枠の頂端内面9tbの背部に位置するように、アンカーボルトで位置決めされているため、背部の保護遮水コンクリートを打設する際の保護遮水コンクリートの圧力によって、PC傾斜型枠が正面側に押し出されるのを防止するストッパーの役目も頂端内面9tbが兼ねることになり、位置精度の高いPC傾斜型枠式堤体が実現できる。 Referring to the PC inclined mold 2 in FIG. 2, how to install the PC inclined mold will be described. First, the level adjustment is performed with the iron plate 21 laid under the level adjusting means 6. The level adjusting means 6 shown in the figure has a structure in which a female screw cylinder is embedded in the pedestal plate 4, so that the pedestal plate 4 is moved up and down by rotating the level adjusting bolt 6 b screwed into the female screw cylinder. Level can be adjusted. After the level adjustment, the anchor bolt is tightened and fixed, and then the mortar 22 is poured into the gap below the base plate 4 and filled. Thereafter, protective water-impervious concrete 5c, 5d is placed between the CSG parts, and the lower PC inclined mold frame in which the front surface of the continuous part 8 of each PC inclined mold frame serves as a jig mounting reference surface. Because it is positioned with the anchor bolt so that it is located behind the top end inner surface 9tb, the PC inclined mold is pushed to the front side by the pressure of the protective impermeable concrete when placing the protective impermeable concrete on the back The top end inner surface 9tb also serves as a stopper for preventing the occurrence of the failure, and a PC inclined frame type levee body with high positional accuracy can be realized.

こうして、PC傾斜型枠2の背部に保護遮水コンクリートを打設した際に、PC傾斜型枠2と保護遮水コンクリートとが確実に密着して一体化されるように、斜壁版9の背面は予め粗面化されている。粗面化する手法は任意でよいが、例えば、斜壁版背面に圧力水をジェット噴射したり、サンドブラストする。 Thus, when the protective water-impervious concrete is placed on the back of the PC inclined mold 2, the inclined wall plate 9 is arranged so that the PC inclined mold 2 and the protective impervious concrete are firmly adhered and integrated. The back surface is roughened in advance. The roughening method may be arbitrary, but, for example, jetting pressure water or sandblasting the back of the slanted wall plate.

また、ダム堤体などにおいては、多数のPC傾斜型枠を水平方向に並べて据え付けるが、隣接するPC傾斜型枠間の隙間から水漏れしたり、保護遮水コンクリートを打設する際にのろが漏れ出すのを防ぐことが望ましい。そのため、据え付け状態において、図7のように、隣接するPC傾斜型枠C1、C2の隣接する斜壁版の内面に渡って遮水性のテープ20を貼ることが望ましい。すなわち、隣接する斜壁版間の隙間の上に遮水性のテープ20を貼り付けておいてから、保護遮水コンクリートを打設する。 In addition, on dam dams, etc., a large number of PC inclined molds are installed side by side in the horizontal direction, but when leaking from the gaps between adjacent PC inclined molds or when placing protective impermeable concrete, It is desirable to prevent leakage. Therefore, in the installed state, as shown in FIG. 7, it is desirable to apply a water-blocking tape 20 over the inner surfaces of the adjacent slant wall plates of the adjacent PC inclined molds C1 and C2. That is, after the water-impervious tape 20 is stuck on the gap between the adjacent slant wall plates, the protective water-impervious concrete is placed.

図6は止水板の設置方法を示す図で、図7のG12位置の縦断面図である。図7は図6のD−D断面図であり、保護遮水コンクリートの目地切りの位置を塞ぐための止水板17を設けてある。大規模なコンクリート構造体の場合、コンクリートの温度応力や経時変化に伴うひび割れは避けられない。そこで、コンクリート打設時に約15m間隔で目地切りをしておいて、目地切り部分で、寸法変化を吸収させることが一般に行われている。本発明における保護遮水コンクリートの場合は、この目地切りを、隣接するPC傾斜型枠の境界の位置で行なっている。 FIG. 6 is a view showing a method for installing a water stop plate, and is a longitudinal sectional view at a position G12 in FIG. FIG. 7 is a cross-sectional view taken along the line DD of FIG. 6 and is provided with a water stop plate 17 for closing the joint cutting position of the protective water-impervious concrete. In the case of a large-scale concrete structure, cracks due to temperature stress and aging of the concrete are inevitable. Therefore, it is generally performed that joints are cut at intervals of about 15 m at the time of placing concrete and the dimensional change is absorbed at the joints. In the case of the protective water-impervious concrete in the present invention, this joint cutting is performed at the position of the boundary between adjacent PC inclined molds.

すなわち、図7のように、約15m位置で隣接するPC傾斜型枠C1、C2の隣接する位置G12で目地切りを行なう。目地切りのために、止水板17とCSG部との間に立てる支持鉄板2aを準備し、さらに止水板17と斜壁版9との間に立てる支持鉄板1aとを用意しておく。そして、斜壁版9を設置した後に、前記のCSG部側の支持鉄板2aと斜壁版9側の支持鉄板1aを立てて、間に止水板17を挟持する。この状態で、CSG部と止水板17と支持鉄板2a、1aとPC傾斜型枠C1・C2との間の空間に保護遮水コンクリートを打設することによって、図1に示す保護遮水コンクリート5a、5bを形成する。 That is, as shown in FIG. 7, joint cutting is performed at the adjacent position G12 of the PC inclined molds C1 and C2 which are adjacent at a position of about 15 m. For joint cutting, a supporting iron plate 2a is prepared that stands between the water stopping plate 17 and the CSG portion, and a supporting iron plate 1a that stands between the water stopping plate 17 and the slanted wall plate 9 is prepared. After the inclined wall plate 9 is installed, the water stop plate 17 is sandwiched between the CSG portion side supporting iron plate 2a and the inclined wall plate 9 side supporting iron plate 1a. In this state, the protective water-impervious concrete shown in FIG. 1 is placed by placing the protective water-impervious concrete in the space between the CSG portion, the water stop plate 17, the support iron plates 2a and 1a, and the PC inclined molds C1 and C2. 5a and 5b are formed.

そして養生後に、上段のPC傾斜型枠C1、C2を設置した後、前記と同様にCSG部側の支持鉄板2aと斜壁版9側の支持鉄板1aを立てて、間に止水板17を挟持してから、CSG部と止水板17と支持鉄板2a、1aとPC傾斜型枠C1・C2との間の空間に保護遮水コンクリートを打設する。このようにして、下側の段から上側の段に順次延ばして来た止水板17を目地切り位置に埋め込んでいく。 After curing, after installing the upper PC inclined molds C1 and C2, the support iron plate 2a on the CSG portion side and the support iron plate 1a on the slant wall plate 9 side are erected in the same manner as described above, and the water stop plate 17 is interposed therebetween. After clamping, protective water-impervious concrete is placed in the space between the CSG portion, the water stop plate 17, the support iron plates 2a and 1a, and the PC inclined molds C1 and C2. In this way, the water stop plate 17 that has been sequentially extended from the lower stage to the upper stage is embedded in the joint cutting position.

このように、目地切りした箇所では、水漏れ防止のために止水板17を設けるため、止水板17の全長にわたって所定寸法のコンクリート被りを確保する必要がある。ところが、PC傾斜型枠の台座版4の端部が止水板17の設置の邪魔になるので、止水板17から被り寸法分を確保できるように、止水板17を避けるために、台座版端部に欠除空間191、192を形成してある。そして、この欠除空間191、192中で止水板17を位置決めしてから、この欠除空間191、192中にも保護遮水コンクリートを打設するので、所要寸法の被りを確保して、水漏れ防止を確保できる。このように被り確保の目的で欠除空間191、192を形成しているが、各PC傾斜型枠2の両端に欠除空間191、192を形成することによって、PC傾斜型枠自体の軽量化と材料費節減となる。なお、20は、前記の隣接斜壁版間に貼る遮水性テープである。 As described above, in order to provide the water stop plate 17 in order to prevent water leakage at the jointed portion, it is necessary to secure a concrete covering having a predetermined dimension over the entire length of the water stop plate 17. However, since the end portion of the base plate 4 of the PC inclined mold frame obstructs the installation of the water stop plate 17, in order to avoid the water stop plate 17 so as to secure the covering dimension from the water stop plate 17, Absent spaces 191 and 192 are formed at the end of the plate. And after positioning the water stop board 17 in this lacking space 191 and 192, since the protective water-impervious concrete is placed also in this lacking space 191 and 192, the covering of a required dimension is ensured, Prevents water leakage. In this way, the missing spaces 191 and 192 are formed for the purpose of securing the covering, but by forming the missing spaces 191 and 192 at both ends of each PC inclined mold 2, the weight of the PC inclined mold itself is reduced. And material cost savings. In addition, 20 is a water-proof tape stuck between the adjacent slant wall plates.

以上のように、本発明によると、台座版と一体に連続している斜壁版を有する自立型のPC傾斜型枠を使用し、下段のCSG部とPC傾斜型枠との間に打設した保護遮水コンクリート中に、下段のPC傾斜型枠の斜壁版の頂端内面の鉛直面を基準にして、治具で位置決めしてアンカーボルトを挿入埋め込みして、上段のPC傾斜型枠の据え付けの基準にする。そして、保護遮水コンクリートが硬化した後に、前記の治具を除去して、前記のアンカーボルトが上段のPC傾斜型枠の台座版のアンカーボルト孔に入るように位置決めして固定してから、上段のPC傾斜型枠とCSG部との間に保護遮水コンクリートを打設する。このように自立型のPC傾斜型枠を用いるので、作業が容易で能率的に施工でき、工期の短縮が可能となる。PC傾斜型枠の据え付けも容易で正確となり、水漏れ防止なども万全である。 As described above, according to the present invention, a self-supporting PC inclined mold having a slanted wall slab that is continuous with the pedestal is used, and placed between the lower CSG portion and the PC inclined mold. In the protected water-impervious concrete, the vertical surface of the top end of the slant wall plate of the lower PC inclined mold frame is used as a reference, and the anchor bolt is inserted and embedded with the jig, and the upper PC inclined mold frame Use as a standard for installation. Then, after the protective impermeable concrete is cured, the jig is removed, and the anchor bolt is positioned and fixed so that the anchor bolt enters the anchor bolt hole of the pedestal plate of the upper PC inclined mold frame. Protective impermeable concrete is placed between the upper PC inclined formwork and the CSG part. As described above, since the self-supporting PC inclined formwork is used, the work can be performed easily and efficiently, and the construction period can be shortened. PC inclined formwork can be installed easily and accurately, and water leak prevention is also perfect.

本発明によるダム堤体の斜面施工法を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the slope construction method of the dam dam body by this invention. 図1の第2段目のPC傾斜型枠とその関連構成の詳細を示す縦断面図である。It is a longitudinal cross-sectional view which shows the detail of the 2nd step | paragraph PC inclination formwork of FIG. 1, and its related structure. PC傾斜型枠の背面図である。It is a rear view of PC inclination formwork. 図3におけるA−A位置の断面図である。It is sectional drawing of the AA position in FIG. アンカーボルトの位置決め治具の詳細を示す図で、(1)は平面図、(2)は側面図、(3)は正面図である。It is a figure which shows the detail of the positioning jig | tool of an anchor bolt, (1) is a top view, (2) is a side view, (3) is a front view. 止水板の設置位置を示す図で、図7のG12位置の縦断面図である。It is a figure which shows the installation position of a water stop board, and is a longitudinal cross-sectional view of G12 position of FIG. 図6のD−D断面図である。It is DD sectional drawing of FIG.

符号の説明Explanation of symbols

1 基礎コンクリート
2 PC傾斜型枠
3 アンカーボルト
4 台座版
5 保護遮水コンクリート(後打ちコンクリート)
6 レベル調整手段
7 吊り金具
8 連続部
9 斜壁版
9tb 頂端内面
W 重心点
10 凹室
11 ボルト孔
12 治具
12j 連結部材
13 支持筒
14 基準板
15 蝶ボルト
16 ボルト孔
17 止水板
191、192 欠除空間
20 遮水性テープ
1 Foundation concrete
2 PC inclined formwork
3 Anchor bolt 4 Base version
5 Protective impermeable concrete (post-cast concrete)
6 Level adjustment means
7 Hanging bracket
8 continuous parts
9 Diagonal wall version
9tb Top end inner surface
W Center of gravity
DESCRIPTION OF SYMBOLS 10 Recessed chamber 11 Bolt hole 12 Jig 12j Connecting member 13 Support cylinder 14 Reference | standard board 15 Butterfly bolt 16 Bolt hole 17 Water stop plate 191, 192 Absent space 20 Water-proof tape

Claims (10)

ダム堤体などの斜面を施工する際に用いるPC傾斜型枠における水平の台座版と斜壁版が連続部を介して一体となり、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな構造において、
前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記連続部の正面に形成した鉛直面と背面に形成した鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあること、
前記斜壁版の頂端背面には、アンカーボルトの位置決め時の基準面並びに保護遮水コンクリート打設時のストッパーとなる鉛直面を有していること、
下段の斜壁版の頂端背面の鉛直面の背部に、前記の連続部正面の鉛直面が配置されるように、前記台座版の所定位置に予めアンカーボルト挿入孔を開けてあること、
前記台座版のスパン方向の両端と中間部に、レベル調整手段を装備してあること、を特徴とするPC傾斜型枠。
A horizontal pedestal plate and a slant wall plate in a PC inclined form used when constructing a slope such as a dam dam body are integrated through a continuous part, and the slant wall plate is higher than the longitudinal dimension of the pedestal plate, And in the structure with large dimensions in the front-rear direction,
The plate thickness between the vertical surface formed on the front surface of the continuous portion and the vertical surface formed on the back surface is set so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate. The weight and strength are increased by increasing the thickness of the wall and pedestal plates,
The back of the top end of the slanted wall plate has a reference surface when positioning the anchor bolt and a vertical surface serving as a stopper when placing the protective impermeable concrete,
An anchor bolt insertion hole is previously opened at a predetermined position of the pedestal plate so that the vertical surface of the continuous portion front surface is arranged on the back of the vertical surface of the top end back surface of the lower inclined wall plate,
A PC inclined formwork characterized in that level adjusting means are provided at both ends and an intermediate part in the span direction of the base plate .
前記の斜壁版において、
前記PC傾斜型枠の重心位置を吊り上げ可能な位置に、着脱可能な吊り金具を仮止め可能となっていることを特徴とする請求項1に記載のPC傾斜型枠。
In the above slanted wall version,
The PC in the gravity center position can be lifted position of the inclined frame, PC Slope Panel according to claim 1, characterized in Rukoto removable hanger has become possible temporary fixing.
アンカーボルトの固定位置を決める治具における水平方向に延びた連結部材の一端に、前記斜壁版の頂端背面の鉛直面に仮止め固定する基準部材を有しており、At one end of the connecting member extending in the horizontal direction in the jig that determines the fixing position of the anchor bolt, it has a reference member that is temporarily fixed to the vertical surface of the top end back surface of the slant wall plate,
他端には、アンカーボルトが挿入支持される支持筒を有しているアンカーボルト位置決め治具が、At the other end, an anchor bolt positioning jig having a support cylinder into which the anchor bolt is inserted and supported,
その基準部材によって請求項1または請求項2に記載の斜壁版の頂端背面の鉛直面に仮止め固定されていることを特徴とするPC傾斜型枠。A PC inclined formwork characterized in that it is temporarily fixed to the vertical surface of the back of the top end of the slanted wall plate according to claim 1 or 2 by the reference member.
PC傾斜型枠の据え付け状態で隣接台座版間において、CSG部と斜壁版との間で下側の段から上側の段に延ばして来た止水板の被りを確保するために、止水板を避けるための欠除空間を台座版端部に形成してあることを特徴とする請求項1、請求項2または請求項3に記載のPC傾斜型枠。 In order to secure the covering of the water stop plate extending from the lower step to the upper step between the CSG part and the inclined wall plate between the adjacent pedestal plates with the PC inclined form frame installed, PC slope Panel according to claim 1, claim 2 or claim 3, wherein the tare Rukoto the lack space formed in the base plate end portion for avoiding the plate. 前記の斜壁版の背面が圧力水のジェット噴射などの手法によって粗面化されていることを特徴とする請求項1から請求項4までのいずれかの項に記載のPC傾斜型枠。 The PC inclined mold according to any one of claims 1 to 4, wherein a rear surface of the slanted wall plate is roughened by a technique such as jet injection of pressure water . 水平の台座版と一体の斜壁版を有し、前記台座版の前後方向の寸法より前記斜壁版が高く、かつ前後方向の寸法が大きな構造のPC傾斜型枠を多数隣接配置し、しかも前記台座版と斜壁版間の連続部正面の鉛直面を下段の斜壁版の頂端背面の鉛直面の背部に規定位置のアンカーボルトで位置決めした状態で固定してあること、A slant wall plate integrated with a horizontal base plate, and a plurality of PC inclined molds having a structure in which the slant wall plate is higher than the front and rear direction dimension of the base plate and the front and rear direction dimension is large; The vertical surface of the front part of the continuous portion between the pedestal plate and the inclined wall plate is fixed in a state where it is positioned with the anchor bolt at a predetermined position on the back of the vertical surface of the top end back surface of the lower inclined wall plate,
前記台座版の平面領域内に、前記PC傾斜型枠全体の重心が位置するように、前記台座版と斜壁版との連続部の背面にも鉛直面を形成し、この背面の鉛直面と前記の連続部正面の鉛直面との間の版厚を、前記斜壁版および台座版の版厚より大きくして重量と強度を増やしてあること、A vertical surface is also formed on the back surface of the continuous portion of the pedestal plate and the slanted wall plate so that the center of gravity of the entire PC inclined mold is located in the plane area of the pedestal plate, The plate thickness between the vertical surface of the continuous portion front is larger than the plate thickness of the slanted wall plate and the base plate, and the weight and strength are increased.
CSG部と自立させて据え付けしたPC傾斜型枠との間の空間部に、後打ちコンクリートとして保護遮水コンクリートを打設してなる構造を、複数段積層施工してなることを特徴とするダム堤体などの斜面の施工構造。A dam characterized in that a structure formed by placing protective water-impervious concrete as post-cast concrete in the space between the CSG section and the PC inclined mold that is installed independently Construction structure of slopes such as embankments.
止水板とCSG部との間、並びに止水板と前記斜壁版との間に支持鉄板をそれぞれ立てて、前記CSG部側の支持鉄板と斜壁版側の支持鉄板で止水板を挟持した状態で、CSG部と止水板とその前後の支持鉄板とPC傾斜型枠との間の空間に保護遮水コンクリートを打設することによって前記の保護遮水コンクリートの目地切りの位置を塞ぐための止水板を設けてあることを特徴とする請求項6に記載のダム堤体などの斜面の施工構造。A support iron plate is erected between the water stop plate and the CSG unit, and between the water stop plate and the slant wall plate, and the water stop plate is installed with the support iron plate on the CSG unit side and the support iron plate on the slant wall plate side. In the sandwiched state, the position of the joint between the protective water-impervious concrete is placed by placing the protective water-impervious concrete in the space between the CSG part, the water stop plate, the supporting iron plate before and after the plate, and the PC inclined formwork. The construction structure of slopes, such as a dam dam body of Claim 6, provided with the water stop board for plugging up. 互いに隣接するPC傾斜型枠間の隙間をシールするための遮水性のテープを、前記斜壁版の隣接する内面に貼ってあることを特徴とする請求項6または請求項7に記載のダム堤体などの斜面の施工構造。The dam bank according to claim 6 or 7, wherein a water shielding tape for sealing a gap between adjacent PC inclined molds is attached to an adjacent inner surface of the slanted wall plate. Construction structure of slopes such as the body. 水平の台座版と斜壁版間の連続部正面と斜壁版の頂端背面に鉛直面をそれぞれ有するPC傾斜型枠を隣接配置した状態で、In the state where the PC inclined molds each having a vertical surface are arranged adjacent to each other in front of the continuous part between the horizontal base plate and the inclined wall plate and the back of the top end of the inclined wall plate,
下段のPC傾斜型枠の斜壁版の頂端背面の鉛直面を基準にして、治具を用いて位置決めしたアンカーボルトを下段の保護遮水コンクリート中に挿入し、Insert the anchor bolts positioned using a jig into the lower protective water-impervious concrete with reference to the vertical plane of the top end of the slant wall plate of the lower PC inclined formwork,
前記の保護遮水コンクリートが硬化した後に、前記の治具を除去して、前記のアンカーボルトを上段のPC傾斜型枠の台座版のアンカーボルト孔に挿入することによって、前記の下段の斜壁版の頂端背面の鉛直面の背部に台座版正面の鉛直面を配置した状態で、After the protective impervious concrete is cured, the jig is removed, and the anchor bolt is inserted into the anchor bolt hole of the pedestal plate of the upper PC inclined form frame to thereby form the lower inclined wall. With the vertical plane in front of the base plate placed behind the vertical plane at the back of the top of the plate,
前記台座版に設けたレベル調整手段でレベル調整してから、アンカーボルトにナット締めして固定し、After adjusting the level with the level adjusting means provided on the pedestal plate, tighten the nut to the anchor bolt and fix it,
上段のPC傾斜型枠とCSG部との間に保護遮水コンクリートを打設することを特徴とするPC傾斜型枠を用いた斜面部の施工方法。A method for constructing a slope portion using a PC inclined mold frame, wherein protective water-impervious concrete is placed between the upper PC inclined mold frame and the CSG portion.
レベル調整後の前記台座版の下の隙間にモルタルを流し込んで充填することを特徴とする請求項9に記載のPC傾斜型枠を用いた斜面部の施工方法。The method for constructing a slope portion using a PC inclined mold according to claim 9, wherein mortar is poured and filled in a gap under the pedestal plate after level adjustment.
JP2004106767A 2004-03-31 2004-03-31 Construction method of PC inclined formwork and dam body for dam construction Expired - Lifetime JP4079435B2 (en)

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