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JP4747014B2 - Reinforcement structure and method for concrete waterway - Google Patents
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JP4747014B2 - Reinforcement structure and method for concrete waterway - Google Patents

Reinforcement structure and method for concrete waterway Download PDF

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JP4747014B2
JP4747014B2 JP2006085227A JP2006085227A JP4747014B2 JP 4747014 B2 JP4747014 B2 JP 4747014B2 JP 2006085227 A JP2006085227 A JP 2006085227A JP 2006085227 A JP2006085227 A JP 2006085227A JP 4747014 B2 JP4747014 B2 JP 4747014B2
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concrete
water channel
concrete water
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孝信 森田
紘治 豊田
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株式会社シクソン
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Description

本発明は、農業用水路、流雪溝、下水溝などを構築する、コンクリート製水路の補強構造とその工法に関する。   The present invention relates to a concrete waterway reinforcing structure and construction method for constructing agricultural waterways, snow drift grooves, sewer grooves, and the like.

この種コンクリート製水路は、長期使用によるコンクリートの劣化などに伴い、一部が破損したり変形する虞れがある。
コンクリート製水路の補強としては、図5に示すように、水路本体100の開口部にコンクリートや鋼材などからなる補強桟200を適宜間隔毎に架設する構造が古くから知られている。しかし、このような補強構造によれば、子供などが補強桟200に乗って遊ぶ虞れが有り、落下事故を誘発するという問題があった。
そこで、補強桟200を、図5中に仮想線で示すように、水路内に架設することも考えられるが、この場合、流水抵抗が増加してしまうばかりか、流水面積が大幅に減少する虞れがあるので好ましくない。
This kind of concrete water channel may be partially damaged or deformed due to deterioration of concrete due to long-term use.
As a reinforcement of a concrete water channel, as shown in FIG. 5, a structure in which reinforcing bars 200 made of concrete, steel, or the like are installed at appropriate intervals in an opening of a water channel body 100 has been known for a long time. However, according to such a reinforcing structure, there is a possibility that children or the like may play on the reinforcing bar 200 and cause a fall accident.
Therefore, it is conceivable that the reinforcing bar 200 is installed in the water channel as shown by the phantom line in FIG. 5, but in this case, not only the flow resistance increases but also the flow area may be significantly reduced. This is not preferable.

一方、老朽化したコンクリート製既設水路の内壁面などを補修する方法として、例えば特許文献1、2などに開示されるように、水路内壁面に、プラスチック板やFRP板をアンカーボルト止めする工法が提案されている。   On the other hand, as a method of repairing the inner wall surface of an old concrete channel that has deteriorated, as disclosed in Patent Documents 1 and 2, for example, there is a method of anchoring a plastic plate or FRP plate to the inner wall surface of the channel with an anchor bolt. Proposed.

しかしながら、このような従来の補修工法によれば、老朽化した既設コンクリート内壁面の除去、新設コンクリートの増打ち、FRP板等のアンカーボルト止め、型枠設置などの手間を要するため、相当の工期が必要であった。
また、コンクリートの増打ちやFRP板等の厚み分だけ水路内の流水面積が低減する、水路内に突出するアンカーボルトの頭部が流水抵抗となるなどの問題があった。
However, according to such a conventional repair method, it takes time to remove the old wall surface of the existing concrete, reinforce the new concrete, fix the anchor bolts such as FRP plates, and install the formwork. Was necessary.
In addition, there have been problems such as the increase in concrete and the flow area in the water channel reduced by the thickness of the FRP plate or the like, and the head of the anchor bolt protruding into the water channel has resistance to water flow.

特開2000−230226号公報JP 2000-230226 A 特開2002−266337号公報JP 2002-266337 A

本発明者は鋭意検討を行い、前記した従来事情、並びに、既設のコンクリート製水路が、その構造上、耐久性や耐震強度が低く長期の使用や地震などにより亀裂などが生じ易いという事実を知見した。詳しくは、20〜30年を経過したコンクリート製水路は通常、施工初期に比べ強度が大幅に低下している。また、数箇所の実地現場において、コンクリート製水路のシュミット調査(コンクリート圧縮強度試験)を行い、水路の側壁上部に比べ、側壁下部及び底壁部のコンクリート強度が30%程度低下しているという新たな知見を得た。このようなコンクリート製水路特有の強度低下は、コンクリート製水路の側壁にかかる土圧が、初期計算値より大幅に低下しているとの推測に基づき、さらに鋭意検討を続け、水路内底部における左右両側の隅部を補強することが、該コンクリート製水路の構造強度の向上に極めて効果的であるという知見を得て、本発明を完成するに至った。   The present inventor has intensively studied and found out the above-described conventional situation and the fact that the existing concrete water channel is low in durability and seismic strength due to its structure and easily cracked due to long-term use or earthquake. did. In detail, the strength of concrete water channels that have passed 20 to 30 years has been greatly reduced compared to the initial stage of construction. In addition, we conducted a Schmidt survey (concrete compressive strength test) of concrete water channels at several actual sites, and the concrete strength at the bottom and bottom walls of the side walls is about 30% lower than that at the top of the side walls. I got a good knowledge. Such a decrease in strength peculiar to a concrete canal is based on the assumption that the earth pressure applied to the side wall of the concrete canal is significantly lower than the initial calculated value. Obtaining the knowledge that reinforcing the corners on both sides is extremely effective in improving the structural strength of the concrete water channel, the present invention has been completed.

すなわち、本発明は、簡単な工法でコンクリート製水路の耐久性、耐震強度などを大幅に向上し得る新規な水路補強構造とその工法を提供することを目的とする。   That is, an object of the present invention is to provide a novel water channel reinforcement structure and its construction method capable of greatly improving the durability and seismic strength of a concrete water channel with a simple construction method.

以上の目的を達成するために本発明は、コンクリート製水路の内底部における左右両側の隅部を補強する補強構造体を、該コンクリート製水路の流水方向に沿って配設してなることを要旨とする。
このような構成の補強構造とすることで、流水面積の大幅な低減や、流水抵抗の増大などを招くことなく、コンクリート製水路の耐久性、耐震性などを向上させることができる。
In order to achieve the above object, the present invention provides a reinforcing structure that reinforces the left and right corners of the inner bottom of a concrete water channel along the flowing direction of the concrete water channel. And
By adopting such a reinforcing structure, it is possible to improve the durability, earthquake resistance, and the like of the concrete water channel without significantly reducing the flowing water area or increasing the flowing water resistance.

補強構造体は、コンクリート製水路の内底部における左右両側の隅部を補強可能な形状で、且つ、水路内の流水面積の大幅な低減や、流水抵抗を増大させる虞れの少ない形状とすることが好ましい。詳しくは、少なくとも、コンクリート製水路の左右側壁の内面に沿う立面部分と、該コンクリート製水路の底壁上面に沿う底面部分とを備えた断面形状であって、例えば、断面台形状、断面三角形状、断面台形状、断面四角形状、断面L字形状、、断面ハ字形状、断面逆ハ字形状、断面三角形枠型状、断面四角形枠型状、断面五角形枠型状、断面ハ字形枠型状、断面逆ハ字形枠型状などに形成することができる。また、夫々の形状において、角部分をアール形状としたり角を切り欠いた傾斜面とする形状とすることができる。
この中でも、前記した耐久性、耐震性、流水面積、流水抵抗の点などを考慮すれば、断面L字形状、断面三角形状、断面台形状とすることがより好ましい。
The reinforcing structure shall have a shape that can reinforce the left and right corners of the inner bottom of the concrete water channel, and a shape that does not significantly reduce the flow area in the water channel and increase the flow resistance. Is preferred. Specifically, it is a cross-sectional shape including at least a vertical surface portion along the inner surfaces of the left and right side walls of the concrete water channel and a bottom surface portion along the top surface of the bottom wall of the concrete water channel, for example, a cross-sectional trapezoidal shape, a cross-sectional triangle Shape, trapezoidal cross-section, rectangular cross-section, L-shaped cross-section, cross-section H-shape, inverted cross-section H-shape, cross-section triangle frame shape, cross-section square frame shape, cross-section pentagon frame shape, cross-section H-shape frame shape It can be formed into a shape, a cross-sectional inverted box shape, or the like. Moreover, in each shape, it can be set as the shape which makes the corner | angular part the round shape or the inclined surface which notched the corner.
Among these, in view of the durability, the earthquake resistance, the flowing water area, the flowing water resistance, etc., it is more preferable to have a cross-sectional L shape, a cross-sectional triangle shape, and a cross-sectional trapezoidal shape.

補強構造体の形成材料としては、コンクリート(一般コンクリート)、高強度コンクリート(レジンコンクリート、ポリマーコンクリート、スチールファイバーコンクリート、特殊コンクリートなど)、高強度樹脂、金属(主に鋼板)などを挙げることができ、これら材料は、コンクリート製構造物等の分野で知られたものを用いることができる。
また、補強構造体は、コンクリート、高強度コンクリート、高強度樹脂により、現場打設工法で形成することもできるし、コンクリート、高強度コンクリート、高強度樹脂、金属などにより、予め形成されたブロック体を複数用いることもできる。
Examples of forming materials for reinforced structures include concrete (general concrete), high-strength concrete (resin concrete, polymer concrete, steel fiber concrete, special concrete, etc.), high-strength resin, and metal (mainly steel plates). As these materials, those known in the field of concrete structures and the like can be used.
In addition, the reinforcing structure can be formed by an on-site casting method using concrete, high-strength concrete, or high-strength resin, or a block body formed in advance using concrete, high-strength concrete, high-strength resin, metal, or the like. A plurality of can also be used.

補強構造体として予め形成されたブロック体を用いる場合、該補強構造体を、固定手段を用いて、コンクリート製水路の内底部における左右両側の隅部に、該コンクリート製水路の流水方向に沿って連続するよう複数固定することができる。   When a pre-formed block body is used as the reinforcing structure, the reinforcing structure is fixed to the left and right corners of the inner bottom of the concrete water channel along the flowing direction of the concrete water channel. A plurality can be fixed so as to be continuous.

ここで、補強構造体が金属製である場合、固定手段としては、アンカーボルトなどのボルト止め手段を用いることができる。またこの場合、金属製補強構造体の表面を防錆処理することが好ましい。また、アンカーボルトなどのボルト止め手段(固定手段)の頭部や端部などが、水路内に突出して流水抵抗となる虞れがあるので、流水抵抗を低減させるために、カバーなどで覆うことが好ましい。   Here, when the reinforcing structure is made of metal, bolt fixing means such as anchor bolts can be used as the fixing means. In this case, the surface of the metal reinforcing structure is preferably subjected to rust prevention treatment. In addition, the head and end of bolting means (fixing means) such as anchor bolts may protrude into the water channel and become running resistance, so cover them with a cover to reduce running resistance. Is preferred.

補強構造体がコンクリート、高強度コンクリート、高強度樹脂などからなる場合、前記した防錆処理などは不要である。
またこの場合、固定手段としては、アンカーボルトなどのボルト止め手段を用いることもできるし、エポキシ系接着剤やモルタル、ポリマーモルタルなどの高接合強度(接合強度20kg/cm以上、より好ましくは70kg/cm以上)の接合材料を用いることができる。
ボルト止め手段を用いた場合、コンクリート製水路に対し、補強構造体をより確実に固定することができる。
エポキシ系接着剤、モルタル、ポリマーモルタルなどの接合材料を用いた場合、流水抵抗の増加を抑制しながら、コンクリート製水路内の所定箇所に、補強構造体を簡単に接合一体化することができる。
When the reinforcing structure is made of concrete, high-strength concrete, high-strength resin, etc., the above-described rust prevention treatment is not necessary.
Further, in this case, as the fixing means, bolt fixing means such as anchor bolts can be used, and high bonding strength (bonding strength 20 kg / cm 2 or more, more preferably 70 kg) such as epoxy adhesive, mortar, and polymer mortar. / Cm 2 or more) can be used.
When the bolting means is used, the reinforcing structure can be more reliably fixed to the concrete water channel.
When a joining material such as an epoxy adhesive, mortar, or polymer mortar is used, the reinforcing structure can be easily joined and integrated at a predetermined location in the concrete water channel while suppressing an increase in flowing water resistance.

前記補強構造体が高強度コンクリートからなる場合の具体的態様として、セメントを基材とし、金属繊維又は有機繊維、骨材粒子、ポゾラン系反応粒子、分散剤を含む組成物と、水とを混合して成形された、圧縮強度500kg/cm以上のプレキャスト高強度コンクリート製品であって、前記コンクリート製水路の左右側壁の内面に沿う立面部と、該コンクリート製水路の底壁上面に沿う底面部とからなる断面L字形状に形成された態様をあげることができる。
該プレキャスト高強度コンクリート製品を成形するための材料として、より具体的には、例えば、特開平5−310459号、特開平11−246255号などに開示される技術を基礎とした、太平洋セメント社のダクタル(商品名・登録商標)をあげることができる。
As a specific embodiment when the reinforcing structure is made of high-strength concrete, a composition containing a cement as a base material and containing metal fibers or organic fibers, aggregate particles, pozzolanic reaction particles, a dispersant, and water is mixed. A precast high-strength concrete product having a compressive strength of 500 kg / cm 2 or more, and a vertical surface along the inner surfaces of the left and right side walls of the concrete water channel, and a bottom surface along the upper surface of the bottom wall of the concrete water channel The aspect formed in the cross-sectional L-shape which consists of a part can be mention | raise | lifted.
As a material for molding the precast high-strength concrete product, more specifically, for example, based on the technology disclosed in JP-A-5-310459, JP-A-11-246255, etc. You can list Ductals (trade names and registered trademarks).

このような補強構造体を用いた場合、薄肉状で小型な補強構造体であって、流水面積の低減や、流水抵抗の増加などを最小限に抑制しながら、コンクリート製水路の耐久性、耐震性などを効果的に向上させることができる。   When such a reinforced structure is used, it is a thin and small reinforced structure that minimizes the flow area and increases the flow resistance while minimizing the durability and seismic resistance of the concrete water channel. It is possible to effectively improve the properties.

より詳しくは、前記立面部の高さ寸法(h)が、前記コンクリート製水路の深さ寸法(D)の20〜40%であり、前記底面部の幅寸法(w)が、前記立面部の高さ寸法(h)の40〜60%であり、且つ前記立面部と底面部の厚さ寸法(t)が20〜40mmである断面L字形状の補強構造体とすることができる。
この場合、コンクリート製水路の構造強度を25〜35%程度向上し得ることを、実験により確認済みである。
More specifically, the height dimension (h) of the vertical surface part is 20 to 40% of the depth dimension (D) of the concrete water channel, and the width dimension (w) of the bottom surface part is the vertical surface. 40 to 60% of the height dimension (h) of the portion, and a reinforcing structure having an L-shaped cross section in which the thickness dimension (t) of the vertical surface portion and the bottom surface portion is 20 to 40 mm. .
In this case, it has been confirmed by experiments that the structural strength of the concrete water channel can be improved by about 25 to 35%.

この補強構造体は、アンカーボルトなどのボルト止め手段でコンクリート製水路内に固定することができる。また、接合強度70kg/cm以上のエポキシ系接着剤又はポリマーモルタルにより、コンクリート製水路内に固定することができる。 This reinforcing structure can be fixed in the concrete water channel by bolting means such as anchor bolts. Moreover, it can fix in a concrete water channel with the epoxy-type adhesive agent or polymer mortar of 70 kg / cm < 2 > or more of joint strength.

補強構造体を現場打設で形成する場合、少なくとも、前記コンクリート製水路の左右側壁の内面に沿う立面部分と、該コンクリート製水路の底壁上面に沿う底面部分と、該底面部分に対向する上面部分とを備えた断面形状からなり、その高さ寸法(h)が前記コンクリート製水路の深さ寸法(D)の20〜40%であり、上面部分の厚さ寸法(t1)が前記コンクリート製水路の側壁の厚さ寸法(T)と同厚であり、底面部分の厚さ寸法(t2)が前記上面部分の厚さ寸法(t1)の1.5〜2倍(好ましくは1.7倍)となるよう形成することができる。
この場合も、コンクリート製水路の構造強度を25〜35%程度向上し得ることを、実験により確認済みである。
When the reinforcing structure is formed on-site, at least a vertical surface portion along the inner surfaces of the left and right side walls of the concrete water channel, a bottom surface portion along the top surface of the bottom wall of the concrete water channel, and the bottom surface portion are opposed to each other. And the height dimension (h) is 20 to 40% of the depth dimension (D) of the concrete water channel, and the thickness dimension (t1) of the upper surface part is the concrete. The thickness dimension (T) of the side wall of the water channel is the same, and the thickness dimension (t2) of the bottom surface portion is 1.5 to 2 times (preferably 1.7) the thickness dimension (t1) of the top surface portion. Times).
Also in this case, it has been confirmed by experiments that the structural strength of the concrete water channel can be improved by about 25 to 35%.

本発明に係るコンクリート製水路補強構造の施工方法の一例として、〔0014〕又は〔0016〕記載の前記補強構造体を、コンクリート製水路の内底部における左右両側の隅部に、アンカーボルトなどのボルト止め手段、又は、〔0017〕記載の前記エポキシ系接着剤若しくはポリマーモルタルを用いて、コンクリート製水路の流水方向に沿って連続するよう複数固定する工法を挙げることができる。   As an example of a method for constructing a concrete waterway reinforcing structure according to the present invention, the reinforcing structure according to [0014] or [0016] is provided at the left and right corners of the inner bottom part of the concrete waterway with bolts such as anchor bolts. Examples of the fixing method or a method of fixing a plurality of the adhesives continuously along the flowing direction of the concrete water channel using the epoxy adhesive or polymer mortar described in [0017] can be given.

また、〔0018〕記載の前記補強構造体を、コンクリート製水路の内底部における左右両側の隅部に、現場打設により、コンクリート製水路の流水方向に沿って連続するよう形成する工法を挙げることができる。   In addition, a method of forming the reinforcing structure according to [0018] in a continuous manner along the flowing direction of the concrete water channel at the corners on both the left and right sides of the inner bottom of the concrete water channel by on-site placement is given. Can do.

このような工法によれば、本発明に係るコンクリート製水路補強構造を簡単、短期、低コストで施工することができるなど、多くの効果を有する。   According to such a construction method, the concrete waterway reinforcement structure according to the present invention can be constructed in a simple, short-term, and low-cost manner.

尚、本発明が対象とするコンクリート製水路は、耐震補強などが必要な既設のコンクリート製水路や、老朽化した既設のコンクリート製水路である場合に特に顕著な効果を発揮するが、これに限定されるものでは無く、新設のコンクリート製水路においても、耐久性、耐震性などの向上に寄与し得ることは言うまでもない。   The concrete water channel targeted by the present invention is particularly effective when it is an existing concrete water channel that requires seismic reinforcement or an old concrete water channel that has deteriorated. Needless to say, the new concrete water channel can also contribute to improvements in durability and earthquake resistance.

以上説明したように、本発明は、コンクリート製水路の内底部における左右両側の隅部を補強する補強構造体を、前記コンクリート製水路の流水方向に沿って配設するので、流水面積の大幅な低減や流水抵抗の増大などを招くことなく、水路自体の耐久性、耐震性を効果的に向上させることができる。よって、コンクリート製水路の耐用年数を従来より長期化し得ると共に、劣化や老朽化した既設水路の強度を向上させ、大掛かりな補修、改修工事などを不要とし、補強工事に係る日数やコストの大幅な低減を期待し得るなど、多くの効果を有する。   As described above, according to the present invention, the reinforcing structure that reinforces the left and right corners of the inner bottom of the concrete water channel is disposed along the direction of water flow of the concrete water channel, so that the water flow area is greatly increased. The durability and seismic resistance of the water channel itself can be effectively improved without causing a reduction or an increase in running water resistance. Therefore, the service life of the concrete canal can be extended longer than before, and the strength of the existing canal that has deteriorated or deteriorated can be improved, eliminating the need for large-scale repairs and repairs. It has many effects, such as a reduction expected.

以下、実施形態例について、図面を参照しながら説明する。
図1において、100は従来周知の構造からなる農業用のコンクリート製水路であって、左右の側壁101,101と底壁102からなり、その内底部における左右両側の隅部103,103に配設された補強構造体a,aにより、耐久性,耐震性の補強がなされている。
Hereinafter, exemplary embodiments will be described with reference to the drawings.
In FIG. 1, reference numeral 100 denotes an agricultural concrete water channel having a well-known structure, which is composed of left and right side walls 101, 101 and a bottom wall 102, and is disposed at the left and right corners 103, 103 of the inner bottom. Durability and earthquake resistance are reinforced by the reinforced structures a and a.

補強構造体aは、コンクリート製水路100における内底部の左右両側の隅部103,103に合致する形状に形成されるもので、本例では、コンクリート製水路100の左右側壁101,101の内面に沿う立面部1と、該コンクリート製水路の底壁102の上面に沿う底面部2とからなる断面L字形状で、所定の長さ寸法(例えば1m〜3m程度)のブロック体に形成されており、後述する接合材により前記隅部103,103に接合一体化され、コンクリート製水路100の流水方向に沿って連続するよう複数設置されている。   The reinforcing structure a is formed in a shape that matches the left and right corners 103, 103 of the inner bottom of the concrete water channel 100. In this example, the reinforcing structure a is formed on the inner surfaces of the left and right side walls 101, 101 of the concrete water channel 100. It is formed in a block body having a predetermined length (for example, about 1 m to 3 m) in an L-shaped cross section composed of a vertical surface portion 1 and a bottom surface portion 2 along the top surface of the bottom wall 102 of the concrete water channel. In addition, a plurality of pieces are installed so as to be joined and integrated with the corner portions 103 and 103 by a joining material described later, and to be continuous along the flowing direction of the concrete water channel 100.

また、補強構造体aは、セメントを基材とし、金属繊維又は有機繊維、骨材粒子、ポゾラン系反応粒子、分散剤を含む組成物と、水とを混合して成形された、圧縮強度1000kg/cmの高強度のコンクリート二次製品(プレキャストコンクリート製品)である。このような高強度のコンクリート二次製品を成形する材料として、本例では、太平洋セメント社のダクタル(商品名・登録商標)を用いた。 Further, the reinforcing structure a is made of a cement as a base material, and is formed by mixing a composition containing metal fibers or organic fibers, aggregate particles, pozzolanic reaction particles, a dispersant, and water, and has a compressive strength of 1000 kg. / Cm 2 high strength concrete secondary product (precast concrete product). As a material for molding such a high-strength concrete secondary product, a ductal (trade name, registered trademark) manufactured by Taiheiyo Cement Co., Ltd. was used in this example.

また、本例の補強構造体aは、立面部1の高さ寸法(h)が、コンクリート製水路100の深さ寸法(D)の20〜40%であり、底面部2の幅寸法(w)が、立面部1の高さ寸法(h)の40〜60%であり、立面部1と底面部2の厚さ寸法(t)が20〜40mmとなるよう形成されている(図2参照)。   Further, in the reinforcing structure a of this example, the height dimension (h) of the vertical surface portion 1 is 20 to 40% of the depth dimension (D) of the concrete water channel 100, and the width dimension ( w) is 40 to 60% of the height dimension (h) of the elevation part 1 and the thickness dimension (t) of the elevation part 1 and the bottom part 2 is 20 to 40 mm ( (See FIG. 2).

このような補強構造体aを、コンクリート製水路100の内底部における両隅部103,103に接合一体化させるための固定手段として、アンカーボルトなどのボルト止め手段(図示せず)を用いることができる。また、エポキシ系接着剤、モルタル、ポリマーモルタルなどの接合材料を用いることができる。本例では、固定手段として、接合強度70kg/cm以上のエポキシ系接着剤(シクソン社製のエポキシ系接着剤「TS−エポキシ接着剤」)を用いた。 A bolting means (not shown) such as an anchor bolt is used as a fixing means for joining and integrating such a reinforcing structure a to both corners 103 and 103 in the inner bottom of the concrete water channel 100. it can. In addition, a bonding material such as an epoxy adhesive, mortar, or polymer mortar can be used. In this example, an epoxy adhesive (an epoxy adhesive “TS-epoxy adhesive” manufactured by Sixson) having a bonding strength of 70 kg / cm 2 or more was used as a fixing means.

本例の補強構造体aで隅部103,103を補強されたコンクリート製水路100は、流水抵抗が増加するような虞れがなく、流水面積の増加を最小限に抑えながら、耐久性、耐震性などが向上する。
また、前記補強構造体aは、エポキシ系接着剤や、モルタル、ポリマーモルタルなどの接合材料(固定手段)により、コンクリート製水路内の所定箇所に簡単に接合一体化することができるので、簡単、短期、低コストで前記補強を行うことができる。
尚、固定手段としてボルト止め手段を用いた場合、補強構造体aの固定をより確実なものにすることができる。
The concrete water channel 100 in which the corners 103 and 103 are reinforced with the reinforcing structure a of this example has no fear of increasing the flow resistance, and is durable and earthquake resistant while minimizing the increase of the flow area. Improve.
In addition, the reinforcing structure a can be easily joined and integrated at a predetermined location in the concrete water channel by a bonding material (fixing means) such as an epoxy adhesive, mortar, or polymer mortar. The reinforcement can be performed in a short time and at a low cost.
Note that when the bolting means is used as the fixing means, the reinforcing structure a can be fixed more reliably.

本例に係る水路補強構造のより詳細な実施の一例を説明すれば、開口幅(W)が500mm、深さ(D)が700mm、水路内における底壁102の幅(W)が430mm、側壁101の厚さ(T)が50mm、底壁102の厚さ(T)が70mmのコンクリート製水路100に対し、前述の補強構造体aを前記したように設置した。
補強構造体aは、立面部1の高さ寸法(h)を前記深さ寸法(D)の30%=210mm、底面部2の幅寸法(w)を前記高さ寸法(h)の50%=105mm、立面部1と底面部2の厚さ寸法(t)を30mmとなるよう形成した。
該補強構造体aで補強されたコンクリート製水路100と、補強されないコンクリート製水路100の構造強度試験を行った結果、補強構造体aで補強されたコンクリート製水路100の構造強度が30%向上していることが確認できた。
An example of more detailed implementation of the water channel reinforcement structure according to this example will be described. The opening width (W 1 ) is 500 mm, the depth (D) is 700 mm, and the width (W 2 ) of the bottom wall 102 in the water channel is 430 mm. In the concrete water channel 100 having the side wall 101 having a thickness (T 1 ) of 50 mm and the bottom wall 102 having a thickness (T 2 ) of 70 mm, the aforementioned reinforcing structure a was installed as described above.
In the reinforcing structure a, the height dimension (h) of the elevation surface portion 1 is 30% of the depth dimension (D) = 210 mm, and the width dimension (w) of the bottom surface portion 2 is 50 of the height dimension (h). % = 105 mm, and the thickness dimension (t) of the vertical surface portion 1 and the bottom surface portion 2 was 30 mm.
As a result of the structural strength test of the concrete water channel 100 reinforced with the reinforced structure a and the concrete water channel 100 not reinforced, the structural strength of the concrete water channel 100 reinforced with the reinforced structure a is improved by 30%. It was confirmed that

次に、図3に示す実施形態例について説明するが、前述の形態例と同様の構成部分については図中に前記と同一の符号を付すなどして、重複する説明は一部省略する。
この例の補強構造体a’は、現場打設コンクリートによりコンクリート製水路100内に形成されたものである。
補強構造体a’は、コンクリート製水路の左右側壁101,101の内面に沿う立面部分11と、コンクリート製水路の底壁102の上面に沿う底面部分12と、該底面部分12に対向する上面部分13と、水路内に臨む傾斜面部分14で囲まれた断面台形状であって、コンクリート製水路100の流水方向に沿って連続して形成されている。
Next, the embodiment shown in FIG. 3 will be described. However, the same components as those of the above-described embodiment are denoted by the same reference numerals in the drawing, and a part of the overlapping description is omitted.
The reinforced structure a ′ in this example is formed in the concrete water channel 100 from on-site cast concrete.
The reinforcing structure a ′ includes an elevation surface portion 11 along the inner surfaces of the left and right side walls 101, 101 of the concrete water channel, a bottom surface portion 12 along the upper surface of the bottom wall 102 of the concrete water channel, and an upper surface facing the bottom surface portion 12. The trapezoidal section is surrounded by a portion 13 and an inclined surface portion 14 facing the water channel, and is formed continuously along the flowing direction of the concrete water channel 100.

またこの補強構造体a’は、その高さ寸法(h)がコンクリート製水路の深さ寸法(D)の20〜40%であり、上面部分13の厚さ寸法(t1)がコンクリート製水路の側壁101の厚さ寸法(T)と同厚であり、底面部分13の厚さ寸法(t2)が前記上面部分13の厚さ寸法(t1)の1.3〜2倍となるよう形成されている(図4参照)。 The reinforcing structure a ′ has a height dimension (h) of 20 to 40% of the depth dimension (D) of the concrete water channel, and a thickness dimension (t1) of the upper surface portion 13 of the concrete water channel. The side wall 101 has the same thickness (T 1 ) as the thickness dimension (t 2) of the bottom surface portion 13 and 1.3 to 2 times the thickness dimension (t 1) of the top surface portion 13. (See FIG. 4).

この例の補強構造体a’で隅部103,103を補強されたコンクリート製水路100は、流水抵抗が大幅に増加するような虞れがなく、流水面積の増大を抑えながら、耐久性、耐震性などが向上する。   The concrete water channel 100 in which the corners 103 and 103 are reinforced with the reinforcing structure a ′ in this example has no fear that the flow resistance is greatly increased, and the durability and the earthquake resistance are suppressed while suppressing an increase in the flow area. Improve.

この例に係る水路補強構造のより詳細な実施の一例を説明すれば、開口幅(W)が500mm、深さ(D)が700mm、水路内における底壁102の幅(W)が430mm、側壁101の厚さ(T)が50mm、底壁102の厚さ(T)が70mmのコンクリート製水路100に対し、前述の補強構造体a’を前記したように設置した。
補強構造体a’は、高さ寸法(h)がコンクリート製水路の深さ寸法(D)の30%=210mm、上面部分13の厚さ寸法(t1)が前記側壁101の厚さ寸法(T)と同厚=50mm、底面部分13の厚さ寸法(t2)が前記上面部分13の厚さ寸法(t1)の1.7倍=85mmとなるよう形成した。
該補強構造体a’で補強されたコンクリート製水路100と、補強されないコンクリート製水路100の構造強度試験を行った結果、補強構造体a’で補強されたコンクリート製水路100の構造強度が30%向上していることが確認できた。
An example of a more detailed implementation of the water channel reinforcement structure according to this example will be described. The opening width (W 1 ) is 500 mm, the depth (D) is 700 mm, and the width (W 2 ) of the bottom wall 102 in the water channel is 430 mm. The aforementioned reinforcing structure a ′ was installed on the concrete water channel 100 having the side wall 101 having a thickness (T 1 ) of 50 mm and the bottom wall 102 having a thickness (T 2 ) of 70 mm as described above.
In the reinforcing structure a ′, the height dimension (h) is 30% of the depth dimension (D) of the concrete water channel = 210 mm, and the thickness dimension (t1) of the upper surface portion 13 is the thickness dimension (T 1 ) = 50 mm, and the thickness (t2) of the bottom portion 13 is 1.7 times the thickness (t1) of the top portion 13 = 85 mm.
As a result of the structural strength test of the concrete water channel 100 reinforced with the reinforced structure a ′ and the non-reinforced concrete water channel 100, the structural strength of the concrete water channel 100 reinforced with the reinforced structure a ′ is 30%. It was confirmed that there was an improvement.

以上、本発明に係るコンクリート製水路の補強構造の例を図面を参照して説明したが、本発明はこれらの例に限定されるものでは無く、各請求項に記載された技術的思想の範疇において、種々の変更が可能であることは言うまでもない。   As mentioned above, although the example of the reinforcement structure of the concrete water channel which concerns on this invention was demonstrated with reference to drawings, this invention is not limited to these examples, The category of the technical idea described in each claim Needless to say, various modifications are possible.

本発明の実施形態の一例に係るコンクリート製水路補強構造の縦断斜視図。The vertical perspective view of the concrete waterway reinforcement structure which concerns on an example of embodiment of this invention. 図1に係る補強構造体とコンクリート製水路の関係を示す簡略断面図。FIG. 2 is a simplified cross-sectional view showing a relationship between a reinforcing structure according to FIG. 1 and a concrete water channel. 本発明の実施形態の他例に係るコンクリート製水路補強構造の縦断斜視図。The longitudinal section perspective view of the concrete channel reinforcement structure concerning other examples of the embodiment of the present invention. 図3に係る補強構造体とコンクリート製水路の関係を示す簡略断面図。FIG. 4 is a simplified cross-sectional view showing the relationship between the reinforcing structure according to FIG. 3 and a concrete water channel. コンクリート製水路補強構造の従来例を示す縦断斜視図。The longitudinal section perspective view which shows the prior art example of the concrete waterway reinforcement structure.

符号の説明Explanation of symbols

a:補強構造体
1:立面部
2:底面部
a’:補強構造体
11:立面部分
12:底面部分
13:上面部分
14:傾斜面部分
100:コンクリート製水路
101:側壁
102:底壁
a: Reinforcement structure 1: Elevation part 2: Bottom part a ': Reinforcement structure 11: Elevation part 12: Bottom part 13: Upper part 14: Slope part 100: Concrete water channel 101: Side wall 102: Bottom wall

Claims (6)

コンクリート製水路の内底部における左右両側の隅部を補強する補強構造体を、前記コンクリート製水路の流水方向に沿って配設してなるコンクリート製水路の補強構造であって、
前記補強構造体が、セメントを基材とし、金属繊維又は有機繊維、骨材粒子、ポゾラン系反応粒子、分散剤を含む組成物と、水とを混合して成形された、圧縮強度500kg/cm 2 以上のプレキャスト高強度コンクリート製品であって、予め形成されたブロック体であり、前記コンクリート製水路の左右側壁の内面に沿う立面部と、該コンクリート製水路の底壁上面に沿う底面部とからなる断面L字形状に形成され、
該補強構造体を、固定手段を用いて、コンクリート製水路の内底部における左右両側の隅部に、該コンクリート製水路の流水方向に沿って連続するよう複数固定してなることを特徴とするコンクリート製水路の補強構造。
A reinforcement structure for reinforcing a concrete water channel, in which a reinforcing structure that reinforces the left and right corners of the inner bottom of the concrete water channel is disposed along the flowing direction of the concrete water channel,
The reinforcing structure is formed by mixing water with a composition containing cement as a base material and containing metal fibers or organic fibers, aggregate particles, pozzolanic reaction particles, and a dispersant, and a compressive strength of 500 kg / cm. a 2 or more precast high strength concrete products, a preformed block body, and elevations portion along the inner surface of the left and right side walls of the concrete water channel, and a bottom portion along the bottom wall upper surface of the concrete waterways Formed in an L-shaped cross section consisting of
A plurality of the reinforcing structures are fixed to the left and right corners of the inner bottom portion of the concrete water channel using a fixing means so as to be continuous along the flowing direction of the concrete water channel. Reinforced structure of waterworks.
前記立面部の高さ寸法(h)が、前記コンクリート製水路の深さ寸法(D)の20〜40%であり、前記底面部の幅寸法(w)が、前記立面部の高さ寸法(h)の40〜60%であり、且つ前記立面部と底面部の厚さ寸法(t)が20〜40mmであることを特徴とする請求項1記載のコンクリート製水路の補強構造。 The height dimension (h) of the elevation part is 20 to 40% of the depth dimension (D) of the concrete water channel, and the width dimension (w) of the bottom part is the height of the elevation part. The reinforcing structure for a concrete water channel according to claim 1 , wherein the thickness (t) is 40 to 60% of the dimension (h), and the thickness dimension (t) of the elevation part and the bottom part is 20 to 40 mm . 前記固定手段がボルト止め手段であり、該ボルト止め手段により、前記補強構造体を、前記コンクリート製水路の内底部における左右両側の隅部に固定したことを特徴とする請求項1又は2記載のコンクリート製水路の補強構造。 The fixing means is a bolting means, and the reinforcing structure is fixed to the left and right corners of the inner bottom of the concrete water channel by the bolting means . Reinforced structure of concrete waterway. 前記補強構造体を、前記コンクリート製水路の内底部における左右両側の隅部に、接合強度70kg/cm 2 以上のエポキシ系接着剤又はポリマーモルタルにより固定せしめてなることを特徴とする請求項1または2記載のコンクリート製水路の補強構造。 The reinforcing structure is fixed to the left and right corners of the inner bottom of the concrete water channel with an epoxy adhesive or polymer mortar having a bonding strength of 70 kg / cm 2 or more. 2. Reinforcement structure of concrete waterway according to 2 . 請求項1又は2記載の前記補強構造体を、コンクリート製水路の内底部における左右両側の隅部に、ボルト止め手段を用いて、コンクリート製水路の流水方向に沿って連続するよう複数固定することを特徴とするコンクリート製水路の補強工法。  A plurality of the reinforcing structures according to claim 1 or 2 are fixed to the left and right corners of the inner bottom of the concrete water channel by using bolting means so as to be continuous along the flowing direction of the concrete water channel. Reinforcement method of concrete waterway characterized by 請求項4記載の前記補強構造体を、コンクリート製水路の内底部における左右両側の隅部に、前記エポキシ系接着剤又はポリマーモルタルを用いて、コンクリート製水路の流水方向に沿って連続するよう複数固定することを特徴とするコンクリート製水路の補強工法。  A plurality of the reinforcing structures according to claim 4 are used so as to be continuous along the flowing direction of the concrete channel using the epoxy adhesive or polymer mortar at the left and right corners of the inner bottom of the concrete channel. A concrete waterway reinforcement method, characterized by fixing.
JP2006085227A 2006-03-27 2006-03-27 Reinforcement structure and method for concrete waterway Expired - Lifetime JP4747014B2 (en)

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