JP2017119986A - Concrete curved surface form, and construction method for concrete curved surface wall - Google Patents
Concrete curved surface form, and construction method for concrete curved surface wall Download PDFInfo
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- 238000010276 construction Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000009415 formwork Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 description 8
- 239000000057 synthetic resin Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
Description
本発明はコンクリート曲面型枠およびコンクリート曲面壁の構築方法に係り、曲面状の側壁やアーチ状スラブ等を現場打ちコンクリートで構築する際に、適用するのに好適なコンクリート曲面型枠およびコンクリート曲面壁の構築方法に関する。 The present invention relates to a method for constructing a concrete curved formwork and a concrete curved wall, and is suitable for use in constructing curved side walls, arched slabs, etc., by using cast-in-place concrete. It relates to the construction method.
従来、曲面状の側壁やアーチ状スラブ等を現場打ちコンクリートで構築する際、曲面型枠が用いられる。この曲面型枠では、合板や樹脂板で作成した曲面のせき板に合わせて曲げ加工された鋼鉄製の角管を支保工として用いていた。しかし、この工法では、角管の曲げ加工に多くの時間を割き、構築するコンクリートの肉厚によっても曲面型枠の曲率が異なるので、多くの種類の曲げ管を製作せざるを得ず、コストが割高になってしまう。このような問題を解決するために、特許文献１に記載している技術がある。 Conventionally, when a curved side wall, an arched slab, or the like is constructed with cast-in-place concrete, a curved formwork is used. In this curved formwork, a steel square tube bent according to a curved plate made of plywood or resin plate was used as a support. However, this method takes a lot of time to bend the square tube, and the curvature of the curved formwork differs depending on the thickness of the concrete to be built. Becomes expensive. In order to solve such a problem, there is a technique described in Patent Document 1.
この特許文献１に記載の技術は、曲面型枠の外側に弾性変形可能な合成樹脂製丸管を配置するとともに、フォームタイ（登録商標）により前記合成樹脂製丸管をその弾性復元力に抗してせき板の曲面に合わせて変形させた状態に締付け固定するようにしたものである。すなわち、曲面型枠の外側に弾性変形可能な塩化ビニール製丸管をそれぞれ２本ずつ一組として、上下方向に複数組配置する。そして、各組の隣接する丸管の突合せ部（端部）に他の丸管の長手方向中間部が位置するように２本の長手方向での位置をずらして配置される。フォームタイ（登録商標）により前記丸管をその弾性復元力に抗して、曲面型枠の曲面に合わせ、まず、長手方向の一端部側を締付ける。次に、その締付け位置から管長手方向に適当な間隔（例えば、６００ｍｍ）離れた位置を別のフォームタイ（登録商標）で締付けて丸管を変形させる。以下、次々とフォームタイ（登録商標）による締付け位置を適当間隔ずつ管長手方向にずらしていくことにより、曲面型枠の曲面に沿った形状に変形されるのである。 The technique described in Patent Document 1 arranges a synthetic resin round tube that can be elastically deformed outside a curved formwork, and resists the elastic restoring force of the synthetic resin round tube by a foam tie (registered trademark). Then, it is fastened and fixed in a deformed state according to the curved surface of the dam plate. That is, a plurality of sets of vinyl chloride round tubes that can be elastically deformed are arranged on the outside of the curved form frame, and two sets are arranged in the vertical direction. Then, the positions in the two longitudinal directions are shifted so that the middle portion in the longitudinal direction of the other round tube is positioned at the abutting portion (end portion) of the adjacent round tube in each set. The above-mentioned round tube is resisted against its elastic restoring force by foam tie (registered trademark) and matched with the curved surface of the curved mold, and first, one end side in the longitudinal direction is tightened. Next, the round tube is deformed by tightening a position spaced apart from the tightening position by an appropriate distance (for example, 600 mm) in the longitudinal direction of the tube with another form tie (registered trademark). Thereafter, the fastening position by the form tie (registered trademark) is successively shifted in the longitudinal direction of the pipe by an appropriate interval, thereby being deformed into a shape along the curved surface of the curved mold.
これによれば、型枠締付け用管として弾性変形可能な合成樹脂製丸管が使用されているので、フォームタイ（登録商標）による締付け力によって曲面型枠の曲面に合わせて変形させることができ、ロール成形機等による曲げ加工が不要であり、あらゆる曲面に対応できるとされている。 According to this, since a plastic tube made of synthetic resin that can be elastically deformed is used as a mold clamping tube, it can be deformed in accordance with the curved surface of the curved mold by a tightening force by a foam tie (registered trademark). It is said that bending by a roll forming machine or the like is unnecessary and it can cope with any curved surface.
しかしながら、上記従来の型枠の構造では、施工性が悪く、且つコスト高となってしまう。これは全ての合成樹脂性丸管を曲げ加工しているため、使用後に廃棄する本数が多くなり、資源の無駄使いとなってしまうからである。また、型枠の曲面を押さえるのに合成樹脂製丸管を用いているため、せき板自体の曲面に依存して固定している。このため、未施工のせき板には予め曲面が定まったものでなくてはならない。すなわち、曲面の基準となる面が存在しなくてはならず、これには剛性の高いせき板、例えば剛性の高い樹脂製のせき板等が必要となる。 However, the conventional formwork structure described above has poor workability and high cost. This is because all the synthetic resin round tubes are bent, so that the number discarded after use increases, resulting in wasteful use of resources. Moreover, since the synthetic resin round tube is used to hold down the curved surface of the mold, it is fixed depending on the curved surface of the dam plate itself. For this reason, a curved surface must be determined in advance on the unconstructed dam plate. That is, there must be a reference surface for the curved surface, which requires a highly rigid slat, for example, a highly rigid resin slat.
また、合成樹脂製丸管を型枠の支保工として用い、順次、端からフォームタイ（登録商標）によって締め付ける構成であるため、誤差が累積しやすい問題がある。また、同時に左右両端方向からの施工が難しく、施工性が悪いという問題もある。
更に、異なる曲面への転用に際しては、丸管であるが故に、撓み方向が一定とならず、締付け力が不安定となってしまう。
In addition, since a synthetic resin round tube is used as a support for the formwork and is sequentially tightened with foam ties (registered trademark) from the end, there is a problem that errors are likely to accumulate. At the same time, there is a problem that the construction from both the left and right ends is difficult and the workability is poor.
Further, when diverting to a different curved surface, the bending direction is not constant because of the round tube, and the tightening force becomes unstable.
本発明は、コンクリート曲面型枠を、曲線加工した鋼製端太材と、鋼製端太材より低剛性の端太材とを、せき板に配設させた簡単な構成にて実現するとともに、そのコンクリート曲面型枠を使用したコンクリート曲面躯体の構築方法を提供することを課題とする。 The present invention realizes a curved concrete form with a simple structure in which a curved steel end piece and an end piece less rigid than the steel end piece are arranged on a slat. It is an object of the present invention to provide a method for constructing a concrete curved frame using the concrete curved formwork.
また、コンクリート曲面型枠においては、湾曲面を構成するための特殊な型枠材の使用割合を少なくすることで、低コストで、かつ適用範囲を拡大して廃棄処分量を低減し、数多く転用することを可能とする環境にやさしい型枠構造を提供することも課題とする。 In addition, in concrete curved formwork, by reducing the usage rate of special formwork materials for forming curved surfaces, the cost can be expanded and the scope of application can be expanded to reduce the amount of waste disposal. Another object of the present invention is to provide an environment-friendly formwork structure that can be performed.
本発明は、上記課題を解決するために、次のように構成した。
すなわち、本発明に係るコンクリート曲面型枠は、せき板と当該せき板の外面に上下に多段に配置された管材とを有し、曲面コンクリートを打設形成する型枠であって、特定の段を構成する管材は躯体を形成するコンクリート曲面の曲率に沿った湾曲管材とし、他の段を形成する管材は弾性変形可能な可撓性直管とするとともに前記せき板を弾性変形可能としたものである。コンクリート曲面型枠においては、所定のコンクリート躯体厚さが確保された一対の型枠材で構成されることが好ましい。
In order to solve the above problems, the present invention is configured as follows.
That is, the concrete curved surface formwork according to the present invention is a formwork having a piling plate and pipes arranged in multiple stages on the outer surface of the piling plate, and is formed by placing curved concrete. The tube material that constitutes the tube is a curved tube material that follows the curvature of the concrete curved surface that forms the frame, and the tube material that forms the other steps is a flexible straight tube that can be elastically deformed, and the baffle plate can be elastically deformed It is. The concrete curved formwork is preferably composed of a pair of formwork materials in which a predetermined concrete frame thickness is secured.
本発明によれば、コンクリート打設時には、コンクリート側圧によって、湾曲材に沿って可撓性のあるせき板と可撓性直管により湾曲管材に沿ったコンクリート曲面型枠が形成され、コンクリート曲面躯体が構築される。コンクリート曲面型枠は、通常の平板面を製造する型枠材料である弾性変形しやすい可撓性のある材料を多く用いつつ、曲面コンクリートを製造するために湾曲管材の使用量が少なくなる。これによって、低コストで型枠を製作することができる曲面コンクリート型枠およびコンクリート曲面壁の製造方法を提供することできる。また、湾曲面を構成するための基準面となる材料は特定の湾曲管材だけで使用割合が少なく、異なる型枠に再度使用する際の廃棄処分が低減できる。 According to the present invention, at the time of placing concrete, a concrete curved surface form along the curved pipe material is formed by the flexible dam plate and the flexible straight pipe along the curved material by the concrete side pressure. Is built. Concrete curved formwork uses a large amount of flexible material that is easily elastically deformed, which is a formwork material for producing a normal flat plate surface, and reduces the amount of curved pipe used to produce curved concrete. Thus, it is possible to provide a method for producing a curved concrete formwork and a concrete curved wall capable of producing a formwork at low cost. Moreover, the material used as the reference surface for constituting the curved surface is only a specific curved tube material, and the usage rate is small, so that the waste disposal when it is used again in a different formwork can be reduced.
本発明に係るコンクリート曲面壁の構築方法は、上記コンクリート曲面型枠を使用したコンクリート曲面壁の構築方法であって、せき板の背面に可撓性直管を配設して、せき板面を平板状に形成し、その後、湾曲管材をせき板の背面にルーズに配設してコンクリート曲面型枠を建て込んだ後、前記コンクリート曲面型枠内にコンクリートを充填し、コンクリート側圧を作用させて、湾曲管材に添うようにせき板および可撓性直管を湾曲面状に変形させることにより、曲面コンクリート躯体を構築することを特徴とする。 A method for constructing a concrete curved wall according to the present invention is a method for constructing a concrete curved wall using the above-mentioned concrete curved formwork. Formed into a flat plate, and then installed the curved curved tube form loosely on the back of the dam plate and built the concrete curved formwork, filled the concrete into the concrete curved formwork, and applied the concrete side pressure. A curved concrete frame is constructed by deforming the siding plate and the flexible straight pipe into a curved surface shape so as to follow the curved pipe material.
本発明によれば、コンクリート側圧による型枠変形を考慮したコンクリート曲面型枠を使用することで、短期間に、低コストにてコンクリート曲面躯体が構築できる。 According to the present invention, a concrete curved surface frame can be constructed in a short time and at a low cost by using a concrete curved surface mold form that takes into account the deformation of the mold form caused by concrete side pressure.
本発明によれば、コンクリート曲面型枠を、特殊な型枠材を殆ど使用することなく、曲線加工した湾曲管材（例えば、鋼製端太材）と、湾曲管材より低剛性の可撓性直管（例えば、樹脂管、木製の端太材や桟木）とを、せき板に配設させた簡単な構成とすることで、適用範囲が広く、かつ低コストによる曲面型枠を実現できる。また、当該コンクリート曲面型枠を使用することで、効率的なコンクリート曲面躯体の構築方法が提供できる。 According to the present invention, a curved curved form material (for example, a steel end thick material) and a flexible straight plate having a lower rigidity than a curved pipe material are used for a curved concrete form with almost no special form material. By adopting a simple structure in which a pipe (for example, a resin pipe, a wooden end piece, or a pier) is disposed on a dam plate, a curved formwork having a wide application range and low cost can be realized. Moreover, the construction method of an efficient concrete curved surface frame can be provided by using the said concrete curved surface formwork.
以下に本発明の実施形態を、図面を参照しつつ、詳細に説明する。なお、以下に示す実施形態は一実施例に過ぎず、本旨を失うことがない限り、その変更は可能である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the embodiment described below is only an example, and can be changed as long as it does not lose the gist.
図１〜２は本実施形態に係るコンクリート曲面型枠の構造の要部斜視図とその断面図であり、図３は部分横断面図、図４はこれに用いられる湾曲管材と可撓性直管の斜視図、図５〜６は実際の型枠構造の構築例を示す縦横断面図である。 1 and 2 are a perspective view and a cross-sectional view of a main part of a structure of a concrete curved form according to the present embodiment, FIG. 3 is a partial cross-sectional view, and FIG. The perspective view of a pipe | tube, FIGS. 5-6 are the vertical and horizontal sectional views which show the construction example of an actual formwork structure.
実施形態に係るコンクリート曲面型枠は、図１に示すようにコンクリートに直接接し、コンクリートの漏れを防ぐ型枠面材（せき板）１２、１２a、１２ｂと、このせき板を支える支保工と、せき板と支保工を緊結して型枠の強度・剛性を保つ締付け金物（セパレータ２２）から構成される。前記支保工は、せき板に直接添わせる内縦端太材１４と、その内縦端太材と直交する位置に設ける外横端太材１５で構成される。本実施形態では、図１、図２に示すように、コンクリート曲面壁を構築するために、外側のせき板（図１にてＡ面側）には、コンクリート曲面壁の曲率に沿った湾曲管材１６と、弾性変形が可能な可撓性直管１８が上下に多段配置されており、内側のせき板（図１にてＢ面側）には可撓性直管１８のみが多段配置されている。可撓性直管１８は、湾曲管材１６よりは剛性が低く、弾性変形可能な合成樹脂材で形成されている。また、本発明の特徴は、一対のせき板同士が所定の壁厚さを保持した状態で、湾曲管材に添うように、型枠内に打設されたコンクリートの側圧によって弾性変形することで、コンクリート曲面壁が形成される点にある。 As shown in FIG. 1, the concrete curved surface form according to the embodiment is in direct contact with concrete and forms surface materials (slabs) 12, 12 a, 12 b that prevent leakage of concrete, and a support that supports the plank, It consists of a clamp (separator 22) that keeps the strength and rigidity of the mold frame by tightly connecting the support plate and the support work. The support is composed of an inner vertical end thick member 14 directly attached to the dam plate and an outer horizontal end thick member 15 provided at a position orthogonal to the inner vertical end thick member. In this embodiment, as shown in FIGS. 1 and 2, in order to construct a concrete curved wall, a curved pipe material along the curvature of the concrete curved wall is provided on the outer dam plate (A surface side in FIG. 1). 16 and flexible straight pipes 18 that can be elastically deformed are arranged in multiple stages in the vertical direction, and only the flexible straight pipes 18 are arranged in multiple stages on the inner dam plate (B side in FIG. 1). Yes. The flexible straight pipe 18 has a lower rigidity than the curved pipe material 16 and is formed of a synthetic resin material that can be elastically deformed. In addition, the feature of the present invention is that the pair of slats are elastically deformed by the side pressure of the concrete placed in the mold so as to follow the curved pipe material while maintaining a predetermined wall thickness. The concrete curved wall is formed.
本実施形態では、図３、５に示すように傾斜したコンクリート曲面壁を構築するために、曲面型枠１０は、コンクリート壁が湾曲する外側をＡ面側とし、内側の面をＢ面側と記載した。なお、図３で湾曲管材１６と可撓性直管１８は同じ太さであり、図面上判別しやすいように模式的に記載している。 In this embodiment, in order to construct an inclined concrete curved wall as shown in FIGS. 3 and 5, the curved mold 10 is configured such that the outside on which the concrete wall is curved is the A surface side, and the inner surface is the B surface side. Described. In FIG. 3, the curved tube 16 and the flexible straight tube 18 have the same thickness and are schematically illustrated so as to be easily distinguished in the drawing.
曲面型枠１０のせき板１２は、弾性変形可能な合板から構成され、外面（Ａ面）側のせき板１２ａと、内面（Ｂ面）側のせき板１２ｂとからなり、一対のせき板同士の間にコンクリート壁部が構築される。また、コンクリート曲面壁を形成させる外側、Ａ面側の外横端太材１５にはサポート受け端太角２８が設けられ、型枠が支持されている。 The slat plate 12 of the curved mold 10 is composed of a resiliently deformable plywood, and includes a slat plate 12a on the outer surface (A surface) side and a slat plate 12b on the inner surface (B surface) side. A concrete wall is constructed in between. Further, the outer lateral end thick material 15 on the outer side and the A side on which the concrete curved wall is formed is provided with a support receiving end thick corner 28 to support the formwork.
図４に、湾曲管材１６と可撓性直管１８の全体形状について、模式的に示す。
湾曲管材１６は、コンクリート曲面壁の曲率に合わせて、ロール成形機で曲線加工された断面サイズが６０×６０ｍｍの角管である。また、可撓性直管１８は、湾曲管材１６より剛性が低く、比較的容易に弾性変形する塩化ビニール系樹脂体であり、曲線加工は行われておらず断面サイズが６０×６０ｍｍの矩形棒状体である。また、湾曲管材と可撓性直管は、其々、せき板に添わせた内縦端太材と直交するように、内縦端太材の外側に配置される（図１を参考）。
FIG. 4 schematically shows the overall shapes of the curved tube material 16 and the flexible straight tube 18.
The curved pipe material 16 is a square tube having a cross-sectional size of 60 × 60 mm, which has been curved by a roll forming machine in accordance with the curvature of the concrete curved wall. Further, the flexible straight pipe 18 is a vinyl chloride resin body having a rigidity lower than that of the curved pipe material 16 and elastically deforming relatively easily, and is not subjected to curve processing and has a rectangular bar shape having a cross-sectional size of 60 × 60 mm. Is the body. Further, the curved tube material and the flexible straight tube are respectively arranged outside the inner vertical end thick member so as to be orthogonal to the inner vertical end thick member attached to the dam plate (see FIG. 1).
Ａ面側のせき板に取り付けられた内縦端太材１４に添わせる湾曲管材と可撓性直管は、図１、図５に示すように、湾曲管材１６を挟んだ上下に２段ずつ、可撓性直管１８が設置される。湾曲管材及び可撓性直管は、其々、鉛直方向に４５０ｍｍ程度の間隔をもって設置される。可撓性直管１８は、最初直線状になっているが、せき板１２内に入れられるコンクリートの側圧により曲げられ、最初に所定の曲率で曲線加工されている湾曲管材１６に倣う形で湾曲され、合板性のせき板１２とともに湾曲し、曲面型枠１０の支保工として機能している。一方、他面（Ｂ面）側のせき板１２ｂには、可撓性直管にみが、鉛直方向に４５０ｍｍ程度の間隔をもって設置される。 As shown in FIGS. 1 and 5, the curved tube material and the flexible straight tube attached to the inner vertical end thick member 14 attached to the A-side side plate are provided in two stages above and below the curved tube material 16. A flexible straight pipe 18 is installed. The curved pipe member and the flexible straight pipe are respectively installed with an interval of about 450 mm in the vertical direction. The flexible straight pipe 18 is initially straight, but is bent by the side pressure of the concrete put in the dam 12 and bent in a manner that follows the curved pipe 16 that is initially curved with a predetermined curvature. Then, it is bent together with the plywood plate 12 and functions as a support for the curved mold 10. On the other hand, only the flexible straight tube is installed on the other surface (B surface) side of the slat 12b with an interval of about 450 mm in the vertical direction.
これらＡ面側の湾曲管材１６と可撓性直管１８を介したせき板１２ｂと、Ｂ面側の可撓性直管１８が取付けられたせき板１２ａが、其々、セパレータ２２により締付け固定されている。 The slat plate 12b through the curved pipe material 16 on the A side and the flexible straight pipe 18 and the slat 12a to which the flexible straight pipe 18 on the B side is attached are fastened and fixed by the separator 22, respectively. Has been.
上記のようなせき板と外横端太材の組み合わせにより、せき板を弾性変形が可能なようにすることで、低コストで施工性の良いコンクリート曲面型枠の構造が実現できる。 The structure of the concrete curved form with good workability can be realized at low cost by enabling the elastic deformation of the dam by the combination of the dam and the outer lateral end thick material as described above.
また、コンクリート曲面壁の外周側に設置されるＡ面側の型枠構造は、図３、５に示すように、外横端太材１５を外側から支持するために外縦端太材２６が配置され、その外縦端太材２６を斜めのサポート受け端太角２８が支えている。また、サポート受け端太角２８は、基盤４０上に設置された台座３０に接合され、支持されている。 Further, as shown in FIGS. 3 and 5, the form structure on the A surface side installed on the outer peripheral side of the concrete curved wall has an outer vertical end thick member 26 for supporting the outer horizontal end thick member 15 from the outside. It is arranged, and an oblique support receiving end thick corner 28 supports the outer vertical end thick material 26. The support receiving end wide angle 28 is joined to and supported by a pedestal 30 installed on the base 40.
このようなコンクリート曲面型枠を用いたコンクリート曲面壁の構築方法は、湾曲管材１６をコンクリート曲面壁の曲率に合わせて曲線加工し、前記湾曲管材１６よりも剛性が低い可撓性直管１８を未加工すなわち直線状のままの直管として用いて支保工とする。そして、可撓性直管１８と同様に弾性変形可能な合板により形成したせき板１２（１２ａ，１２ｂ）によってコンクリート曲面壁を構成する曲面型枠１０を形成する。前記各管１６、１８をせき板１２に対しセパレータ２２により締結する。そして、せき板１２内にコンクリートを打設することにより、コンクリートの側圧が作用する。この側圧は、所定の曲率で形成されて基準面を作っている湾曲管材１６に支えられ、このカーブに倣った形状に可撓性直管１８およびせき板１２が湾曲して、前記曲面壁の曲面を構築することができる。コンクリート厚さはセパレータ２２によって維持される。 The method of constructing a concrete curved wall using such a concrete curved formwork is to curve the curved pipe 16 in accordance with the curvature of the concrete curved wall, and to form a flexible straight pipe 18 having a rigidity lower than that of the curved pipe 16. It is used as a straight pipe that is not processed, that is, straight. Then, similarly to the flexible straight pipe 18, the curved form 10 constituting the concrete curved wall is formed by the slats 12 (12 a, 12 b) formed by a plywood that can be elastically deformed. The pipes 16 and 18 are fastened to the dam 12 by a separator 22. Then, by placing concrete in the dam 12, a concrete side pressure acts. This lateral pressure is supported by the curved tube 16 that is formed with a predetermined curvature and forms a reference surface, and the flexible straight tube 18 and the dam plate 12 are curved in a shape that follows this curve. A curved surface can be constructed. The concrete thickness is maintained by the separator 22.
具体的には、コンクリート曲面型枠１０は、せき板１２の背面に可撓性直管１８を配設して、該せき板面１２を平板状に形成し、その後、湾曲管材１６を前記せき板１２ａの背面にルーズに配設してコンクリート曲面型枠１０を建て込む。前記コンクリート曲面型枠１０内にコンクリートを充填し、Ａ面側にて、コンクリート側圧により前記湾曲管材１６に添うように前記せき板１２ａおよび前記可撓性直管１８を湾曲面状に変形させるとともに、Ｂ面側では弾性変形するせき板１２ｂと可撓性直管１８が曲げ成形されることにより、コンクリート曲面壁が製造される。 Specifically, the concrete curved surface form 10 is provided with a flexible straight pipe 18 on the back surface of the slat plate 12 to form the slat plate surface 12 into a flat plate shape, and then the curved pipe material 16 is placed on the squeeze plate. The concrete curved surface form 10 is installed in a loose manner on the back surface of the plate 12a. The concrete curved mold 10 is filled with concrete, and on the surface A side, the slat 12a and the flexible straight pipe 18 are deformed into a curved surface so as to follow the curved pipe 16 by a concrete side pressure. On the B surface side, the elastically deformed dam plate 12b and the flexible straight pipe 18 are bent to produce a concrete curved wall.
このように構成することによって、曲げ加工する湾曲管材１６の使用量を減らすことができ、直線加工の可撓性直管１８を多用することで、重量の軽減による施工性の良さと、コスト削減ができる。 With this configuration, it is possible to reduce the amount of use of the bending tube material 16 to be bent, and by using a large number of straight straight flexible pipes 18, good workability due to weight reduction and cost reduction. Can do.
なお、上記効果に加え、次のような効果も得られる。
可撓性直管１８としては使用後の形状復帰と湾曲性を考慮すると合成樹脂製のものが望ましい。
In addition to the above effects, the following effects can also be obtained.
The flexible straight pipe 18 is preferably made of a synthetic resin in consideration of the shape return after use and the bendability.
また、一方（Ａ面側）の型枠面に配される湾曲管材１６と、他方（Ｂ面側）の型枠面に配される可撓性直管１８とを一対として用い、その他は可撓性直管１８同士を一対として用い、セパレータ２２により締結することで曲面が湾曲管材１６に沿った形で形成され、簡易な構成にて構築が可能となる。 In addition, the curved tube material 16 disposed on one (A surface side) mold surface and the flexible straight tube 18 disposed on the other (B surface side) mold surface are used as a pair, and the others are acceptable. The flexible straight pipes 18 are used as a pair and fastened by the separator 22 so that the curved surface is formed along the curved pipe material 16 and can be constructed with a simple configuration.
また、曲面型枠１０は少なくとも縦方向に傾斜し、その外側（Ａ面側）に湾曲管材１６が配置される構成とすることで、自然の力を利用した曲面造形が可能となる利点がある。 In addition, the curved mold 10 is inclined at least in the vertical direction, and the curved tube material 16 is disposed on the outer side (A surface side), so that there is an advantage that curved surface modeling using natural force is possible. .
本発明に係る型枠の構造は、せき板１２を支える水平多段に配置された外横端太材を湾曲管材１６と可撓性直管１８により構成している。Ａ面側に配置される鋼管１６はコンクリート曲面の曲率に沿って湾曲した湾曲管材とし、他の段を形成する可撓性直管１８は弾性変形可能な直管とから構成している。また、Ｂ面側に可撓性直管１８を多段に形成し、前記各管１６，１８を型枠に締結するセパレータ２２とによって構成している。これによりコンクリート肉厚を設定条件に維持しつつ、湾曲管材１６に倣った曲面形状とすることができ、これによりコストを抑制しつつ、簡易にコンクリート曲面を構築することができる。 In the structure of the mold according to the present invention, the outer lateral end thick members arranged in multiple horizontal stages for supporting the siding plate 12 are constituted by the curved tube material 16 and the flexible straight tube 18. The steel pipe 16 disposed on the A side is a curved pipe material that is curved along the curvature of the concrete curved surface, and the flexible straight pipe 18 that forms the other steps is constituted by a straight pipe that can be elastically deformed. Further, the flexible straight pipe 18 is formed in multiple stages on the B surface side, and the pipes 16 and 18 are constituted by a separator 22 fastened to a mold frame. Thereby, it can be set as the curved surface shape which followed the curved pipe material 16, maintaining concrete wall thickness on setting conditions, and, thereby, a concrete curved surface can be constructed | assembled easily, suppressing cost.
なお、上記実施形態では、曲面壁を傾斜した状態で説明したが、垂直壁として単純な曲面壁を構成する場合にも適用することができる。この場合には、内側・外側のせき板に対して曲線加工した鋼管と未加工のままの樹脂管とを併設した構造とすることができる。 In the above-described embodiment, the curved wall is described as being inclined. However, the present invention can also be applied to a case where a simple curved wall is configured as the vertical wall. In this case, a structure in which a curved steel pipe and an unprocessed resin pipe are provided side by side with respect to the inner and outer weir plates can be provided.
また、上記実施形態では特にＡ面側において湾曲管材と直管とを１：２の関係においているがこのパターンは任意である。すなわち、湾曲管材と直管とを１：１でも３：１でも可能であり、Ｂ面側に同じく湾曲管材を設置することも可能である。 In the above embodiment, the curved pipe and the straight pipe are in a 1: 2 relationship, particularly on the A plane side, but this pattern is arbitrary. That is, the curved tube material and the straight tube can be 1: 1 or 3: 1, and the curved tube material can also be installed on the B surface side.
この発明は、コンクリート曲面壁を対象としたコンクリート曲面型枠と、そのコンクリート曲面型枠を使用してコンクリート曲面壁を構築する場合に適用できる。 The present invention can be applied to a concrete curved surface form for a concrete curved wall and a concrete curved wall constructed using the concrete curved form.
１０……曲面型枠、１２……せき板、１２ａ……Ａ面側せき板、１２ｂ……Ｂ面側せき板、１４……内縦端太材、１５……外横端太材、１６……湾曲管材、１８……可撓性直管、２２……セパレータ、２６……外縦端太材、２８……サポート受け端太角、３０……台座、３２……枠足場、４０……基盤。
10... Curved formwork, 12... Slat, 12 a... A-side slat, 12 b... B-side slat, 14. ...... curved tube, 18 …… flexible straight tube, 22 …… separator, 26 …… outer vertical end thick material, 28 …… support receiving end thick angle, 30 …… pedestal, 32 …… frame scaffolding, 40… ... the foundation.
Claims (2)
特定の段を構成する管材は躯体を形成するコンクリート曲面の曲率に沿った湾曲管材とし、他の段を形成する管材は弾性変形可能な可撓性直管とするとともに、前記せき板を弾性変形可能としたことを特徴とするコンクリート曲面型枠。 A mold having a dam plate and pipes arranged in multiple stages on the outer surface of the dam plate and casting curved concrete,
The pipe material that constitutes a specific stage is a curved pipe material that follows the curvature of the concrete curved surface that forms the casing, and the pipe material that forms the other stage is a flexible straight pipe that can be elastically deformed. A concrete curved formwork characterized by being made possible.
せき板の背面に可撓性直管を配設して、当該せき板面を平板状に形成し、その後、湾曲管材を前記せき板の背面にルーズに配設してコンクリート曲面型枠を建て込んだ後、
前記コンクリート曲面型枠内にコンクリートを充填し、コンクリート側圧により前記湾曲管材に添うように前記せき板および前記可撓性直管を湾曲面状に変形させることにより、曲面コンクリート躯体を製造することを特徴とするコンクリート曲面壁の構築方法。
A method for constructing a concrete curved wall using the concrete curved form according to claim 1,
A flexible straight pipe is disposed on the back of the slat plate, the slat plate surface is formed into a flat plate shape, and then the curved tube material is loosely disposed on the back surface of the slat plate to build a concrete curved formwork. After
Manufacturing the curved concrete frame by filling the concrete curved formwork with concrete, and deforming the dam plate and the flexible straight pipe into a curved surface so as to follow the curved pipe by a concrete side pressure. A method for constructing a concrete concrete curved wall.
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