JP4371748B2 - Shaped tube structure - Google Patents

Shaped tube structure Download PDF

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Publication number
JP4371748B2
JP4371748B2 JP2003326994A JP2003326994A JP4371748B2 JP 4371748 B2 JP4371748 B2 JP 4371748B2 JP 2003326994 A JP2003326994 A JP 2003326994A JP 2003326994 A JP2003326994 A JP 2003326994A JP 4371748 B2 JP4371748 B2 JP 4371748B2
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pipe
strip
branch pipe
deformed
main pipe
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JP2005090673A (en
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裕司 西川
隆行 岸田
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Kubota Corp
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Kubota Corp
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  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Description

この発明は、異形管の構造に関し、詳しくはＦＲＰ管、又はＦＲＰＭ管などの改良された異形管の構造に関する。   The present invention relates to a structure of a deformed tube, and more particularly, to an improved structure of a deformed tube such as an FRP tube or an FRPM tube.

ＦＲＰ管、又はＦＲＰＭ管などの異形管１として、図９に示すように主管１ａの外側面に枝管１ｂを連通接続したものが知られている(特許文献１)。
ところで、これら異形管１は通常地中に埋設されて配管されるので、埋戻土の土圧が加わり、また、道路下の埋設管の場合は、土圧に加え通行車両の重量が加わる。このため、これら異形管１は変形しやすく、このような荷重に対向させるため、防護コンクリート２を打設し、管路を保護することが行われる。 As a deformed pipe 1 such as an FRP pipe or an FRPM pipe, one having a branch pipe 1b connected to the outer surface of the main pipe 1a as shown in FIG. 9 is known (Patent Document 1).
By the way, since these deformed pipes 1 are normally buried in the ground and piped, earth pressure of the backfill soil is applied, and in the case of buried pipes under the road, the weight of the passing vehicle is added in addition to the earth pressure. For this reason, these deformed pipes 1 are easily deformed, and in order to oppose such a load, protective concrete 2 is placed to protect the pipe line.

しかし、管路においてこのような異形管１毎に防護コンクリート２を打設するのは手間がかかり、また施工時間もかかるので、上記のような外力が作用しても変形に対する追従性を良くし管路の損傷をなくすため、図１０に示すように接続部分に弾性体３を介在させて主管１ａの側面に枝管１ｂを接着し、その周囲をガラス繊維及び樹脂よりなる接着層４を積層して一体化することなどが提案されている(特許文献１)。
特開２０００-２９１８６４号 図１、図２(ａ)、(ｂ) However, it is troublesome and time-consuming to place the protective concrete 2 for each of the deformed pipes 1 in the pipe, so that the followability to deformation is improved even when the above external force is applied. In order to eliminate damage to the pipeline, as shown in FIG. 10, the branch body 1b is bonded to the side surface of the main pipe 1a with the elastic body 3 interposed in the connection portion, and the adhesive layer 4 made of glass fiber and resin is laminated around the periphery. Have been proposed (Patent Document 1).
JP, 2000-291864, A FIG. 1, FIG. 2 (a), (b)

しかしながら、このようにして成形した異形管は、弾性体３や接着層４を構成する樹脂の弾性にもかかわらず、異形管が数％の変形を起こすと、接着層４の浮き変形や剥離が生じるなどの問題があった。   However, the deformed tube formed in this manner is not deformed by several percent when the deformed tube is deformed despite the elasticity of the resin constituting the elastic body 3 and the adhesive layer 4. There was a problem that occurred.

このため、安全策として異形管外周を防護コンクリートで防護するといった施工が結局必要となる場合が多いという問題があった。
この発明は、上記問題を解消し、土圧や通行車両の重量を受ける異形管であっても、変形等による破損を少なくし、かつ容易に接続していくことを可能にすることを課題としてなされたものである。 For this reason, there has been a problem that, as a safety measure, it is often necessary to perform construction such as protecting the outer periphery of the deformed pipe with protective concrete.
It is an object of the present invention to solve the above problems, to reduce damage due to deformation or the like and to easily connect even a deformed pipe that receives earth pressure or the weight of a passing vehicle. It was made.

この課題を達成するため本発明は、主管側面に枝管が連通するように水密に取付けられた異形管において、少なくとも前記枝管外面から前記主管外面にかけて、短冊状補強シートが、前記枝管側では、該枝管の軸方向に沿って、周方向に平行にオーバーラップさせて配列して貼着され、前記主管外面では前記主管と前記枝管の接続部を折れ線として前記主管外面に前記枝管を中心とした放射状に貼着され、さらに、前記枝管外面に延在する短冊状補強シート上と、前記主管外面に延在する短冊状補強シート上とには、それぞれ帯状テープ部材が周方向に巻回されてなるものである。 In order to achieve this object, the present invention provides a deformed pipe that is watertightly attached so that a branch pipe communicates with a side face of a main pipe, and at least the strip-shaped reinforcing sheet extends from the outer face of the branch pipe to the outer face of the main pipe. Then, along the axial direction of the branch pipe, they are arranged and adhered in parallel with each other in the circumferential direction, and on the outer surface of the main pipe, the branch part is connected to the outer surface of the main pipe with a connecting portion of the main pipe and the branch pipe as a broken line A strip-shaped tape member is attached to the strip-shaped reinforcing sheet that is attached radially to the center of the pipe and extends to the outer surface of the branch pipe and the strip-shaped reinforcing sheet that extends to the outer surface of the main pipe. It is wound in the direction.

したがって、この発明によれば、土圧や車両荷重が作用する主管の枝管取付け部分が帯状テープ部材で保護されるので、積層部分の剥離などは生じることがなくそれだけ安全度が増し、防護コンクリートの施工も省略可能となるのである。   Therefore, according to the present invention, the branch pipe mounting portion of the main pipe to which earth pressure or vehicle load acts is protected by the strip-shaped tape member, so that the laminated portion is not peeled off and the safety level is increased, and the protective concrete is increased. The construction of can also be omitted.

次にこの発明の実施の形態である異形管の構造を説明する。
実施の形態１
図１は、この発明の実施の形態１である異形管の構造の要部破断側面図、図２は同じく平面図である。 Next, the structure of the deformed pipe which is an embodiment of the present invention will be described.
Embodiment 1
FIG. 1 is a cutaway side view of an essential part of a deformed pipe structure according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of the same.

図１において、異形管１は、主管１ａの側面に枝管１ｂが軸線を直交して連通して取り付けられている。そして、枝管１ｂ周囲と主管１外面には、樹脂含浸のチョップドストランドマットからなる接着層４が積層され、接続部分からの水漏れが無いように接着されている。   In FIG. 1, a deformed pipe 1 has a branch pipe 1b attached to a side surface of a main pipe 1a so as to communicate with each other at an orthogonal axis. An adhesive layer 4 made of a resin-impregnated chopped strand mat is laminated on the periphery of the branch pipe 1b and the outer surface of the main pipe 1, and is bonded so that there is no water leakage from the connection portion.

そして、この接着層４上には短冊状補強シート５…が、枝管１ｂ側では枝管１ｂの軸方向に沿って周方向に平行に配列して貼着され、主管１ａ側では、主管１ａに対する枝管１ｂの接続立ち上がり部分１ｃを折線６として主管１ａ外面に、枝管１ｂを中心として図２に明示されているように放射状に貼着されている。上記において、短冊状補強シート５…は、ガラス繊維マットあるいはガラスロービングクロスなどに樹脂を含浸させたものが使用され、主管１ａの径にもよるが厚さは最小で５ｍｍ、最大２０ｍｍ程度とされる。そして、枝管１ｂ外周に配列する場合、周方向につき合わせるように配列しても良いが１ｃｍ以上オーバーラップさせて配列することが望ましい。それだけ短冊状補強シート５…による補強効果が得られるからである。   On the adhesive layer 4, strip-shaped reinforcing sheets 5 are stuck and arranged in parallel to the circumferential direction along the axial direction of the branch pipe 1 b on the branch pipe 1 b side, and the main pipe 1 a on the main pipe 1 a side. The connection rising portion 1c of the branch pipe 1b is attached to the outer surface of the main pipe 1a as a broken line 6, and is radially attached around the branch pipe 1b as clearly shown in FIG. In the above, the strip-shaped reinforcing sheet 5 is made of a glass fiber mat or glass roving cloth impregnated with resin, and the thickness is about 5 mm at the minimum and about 20 mm at the maximum depending on the diameter of the main pipe 1a. The And when arranging on the outer periphery of the branch pipe 1b, it may be arranged so as to be aligned in the circumferential direction, but it is desirable to arrange them so as to overlap by 1 cm or more. This is because the reinforcing effect of the strip-shaped reinforcing sheet 5 is obtained.

そして、この短冊状補強シート５…の枝管１ｂの外周部分には、ガラス繊維で織製された帯状テープ７が枝管１ｂの周方向へ巻回貼着され、また、主管１ａの外周部分には放射状に拡がる短冊状補強シート５…上にかかるようにガラス繊維で織製された帯状テープ８が巻回されている。   And the strip-shaped tape 7 woven with glass fiber is wound around the outer peripheral portion of the branch pipe 1b of the strip-shaped reinforcing sheet 5 ... in the circumferential direction of the branch pipe 1b, and the outer peripheral portion of the main pipe 1a. A strip-shaped tape 8 woven of glass fiber is wound around the strip-shaped reinforcing sheet 5 that spreads radially.

この帯状テープ７,８の幅も主管１ａ、枝管１ｂの径によって変化するが、共に小径管で幅１００ｍｍ、大径管で１６０ｍｍ程度とされる。
この帯状テープ８の巻回方向は、枝管１ｂを中心として主管１ａの外面にできるだけ均一に分布するように斜め方向にも巻回される。但し、このとき、ガラス繊維製の帯状テープ８は伸縮弾性がなく、巻回方向を大きく斜め方向へ変化させると皺が出来るため、この皺を発生させないように出来るだけ小さい角度で徐々に屈曲させるようにして巻回して行く。図示例は、説明のため模式的に大きな角度で巻回した状態を示しているが、実際はもっと僅かな角度変化量とされる。 The widths of the strip tapes 7 and 8 vary depending on the diameters of the main pipe 1a and the branch pipe 1b, but both are about 100 mm in width for the small diameter pipe and about 160 mm for the large diameter pipe.
The winding direction of the strip-shaped tape 8 is also wound in an oblique direction so as to be distributed as uniformly as possible on the outer surface of the main pipe 1a with the branch pipe 1b as a center. At this time, however, the glass fiber band-like tape 8 does not have elastic elasticity and can be wrinkled when the winding direction is greatly changed to an oblique direction, so that it is gradually bent at an angle as small as possible so as not to generate this wrinkle. So wind it up. The illustrated example schematically shows a state where the wire is wound at a large angle for the sake of explanation.

以上のように、この実施の形態１の異形管の構造は、主管１ａと枝管１ｂとにかけて貼着される樹脂含浸のチョップドストランドマットからなる接着層４外周に、短冊状補強シート５…を貼着し、さらにその上から抗張力に極めて優れるガラス繊維製の帯状テープ７を巻回すると共に主管１ａ外周にも帯状テープ８を満遍なく巻回して固定してしまうので、異形管が外力により少々変形しても、ガラス繊維製の帯状テープ６によって樹脂含浸のチョップドストランドマットからなる接着層４が押さえられて剥離するような事故は防止される。
実施の形態２
図３は、この発明の実施の形態２である異形管の構造の要部破断側面図である。 As described above, the deformed pipe structure of the first embodiment has a strip-shaped reinforcing sheet 5 on the outer periphery of the adhesive layer 4 made of a resin-impregnated chopped strand mat adhered to the main pipe 1a and the branch pipe 1b. The ribbon-shaped tape 7 made of glass fiber with excellent tensile strength is wound on it, and the strip-shaped tape 8 is uniformly wound around the outer periphery of the main tube 1a so that the deformed tube is slightly deformed by external force. Even so, an accident in which the adhesive layer 4 made of a resin-impregnated chopped strand mat is pressed and peeled by the glass fiber strip tape 6 is prevented.
Embodiment 2
FIG. 3 is a cutaway side view of an essential part of the deformed pipe structure according to the second embodiment of the present invention.

図３において、異形管１は、主管１ａと枝管１ｂとの接合端面に、弾性層９が介挿され、この弾性層９は主管１ａ、枝管１ｂとに一体的に接着されている。
この弾性層９は、弾性を有する接着剤を層状に厚く塗布し硬化させることによって形成する他、弾性層９となるリング体を弾性を有するプラスチックなどで形成し、両者に貼着することによって介挿させても良い。 In FIG. 3, the deformed pipe 1 has an elastic layer 9 interposed between the joint end faces of the main pipe 1a and the branch pipe 1b, and the elastic layer 9 is integrally bonded to the main pipe 1a and the branch pipe 1b.
This elastic layer 9 is formed by thickly applying and curing an adhesive having elasticity, and forming a ring body to be the elastic layer 9 with elastic plastic or the like, and sticking to both to form the elastic layer 9 It may be inserted.

なお、図４に示すように管内面にも同様に短冊状補強シート５…を張り付け、帯状テープ８を内面に張り付けるようにしても良い。
上記で説明した事項以外の、樹脂含浸のチョップドストランドマットからなる接着層４、短冊状補強シート５…、ガラス繊維製の帯状テープ７、８を積層接着していく構成は実施の形態１と同じであるので、図中の同一部材に同じ符号を付すことで、詳細な説明は省略する。 In addition, as shown in FIG. 4, the strip-shaped reinforcement sheet | seat 5 ... may be similarly affixed on a pipe inner surface, and you may make it affix the strip | belt-shaped tape 8 on an inner surface.
Other than the matters described above, the configuration in which the adhesive layer 4 made of a resin-impregnated chopped strand mat, the strip-shaped reinforcing sheet 5, and the glass fiber strips 7 and 8 are laminated and bonded is the same as that of the first embodiment. Therefore, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol to the same member in a figure.

この実施の形態２の異形管の構造は、主管１ａと枝管１ｂとの接着界面に弾性層９が介挿されているので、外力による弾性変形性が良くなる。
実施例
呼び径６００ｍｍのＦＲＰＭ製の主管１ａに、呼び径１００ｍｍのＦＲＰＭ製の枝管１ｂを取り付けた異形管１であって、実施の形態２と同様な構造の異形管１と、比較例として図９に示したように接着層４のみで補強した異形管１を用意し、図５に示すように枝管１ｂが水平方向となるように配置し、矢印Ａで示すように上方から荷重を加え、点線で示すに変形させることで、たわみ率(％)を測定した。 Since the elastic layer 9 is inserted in the bonding interface between the main pipe 1a and the branch pipe 1b, the deformed pipe structure of the second embodiment is improved in elastic deformability due to external force.
Example A deformed pipe 1 in which a FRPM branch pipe 1b having a nominal diameter of 100 mm is attached to a main pipe 1a made of FRPM having a nominal diameter of 600 mm, and a modified pipe 1 having the same structure as that of the second embodiment, as a comparative example As shown in FIG. 9, the deformed pipe 1 reinforced only by the adhesive layer 4 is prepared, and the branch pipe 1b is arranged in the horizontal direction as shown in FIG. 5, and the load is applied from above as shown by the arrow A. In addition, the deflection rate (%) was measured by deformation as shown by the dotted line.

なお、実施例の異形管１の短冊状補強シート５は幅１００ｍｍで、積層範囲は図６、図７に示すようにＳ１が１００ｍｍ、Ｓ２が７０ｍｍ、Ｓ３が２００ｍｍ、帯状テープ８の総厚が外面で５ｍｍ、内面で３ｍｍであった。なお、内面の帯状テープ８は、管内面に押さえつけるように貼りつけていった。   In addition, the strip-shaped reinforcing sheet 5 of the modified tube 1 of the embodiment has a width of 100 mm, and the stacking range is S1 100 mm, S2 70 mm, S3 200 mm, and the total thickness of the strip-shaped tape 8 as shown in FIGS. The outer surface was 5 mm and the inner surface was 3 mm. In addition, the belt-like tape 8 on the inner surface was attached so as to be pressed against the inner surface of the pipe.

その結果は図８の通りであり、従来のものは、たわみ率４.８％で破壊したのに対し、実施の形態２のものは６.５％で破壊し、従来例に対して荷重に対する変形追従性が優れることが確認された。   The result is as shown in FIG. 8, and the conventional one broke at a deflection rate of 4.8%, while the second embodiment broke down at 6.5%, which was higher than the load of the conventional example. It was confirmed that the deformation followability was excellent.

以上のように、この発明の異形管の構造によれば、従来の異形管に比べ破断時のたわみ率が高くなるため、外圧によって変形することがあっても破壊されにくく、そのため配管施工時にコンクリートによる補強工事などは不要となり、施工も容易となる等の効果を有し、特に弾性変形量の大きい大径管において顕著な効果を有する。   As described above, according to the modified pipe structure of the present invention, the deflection rate at the time of breakage is higher than that of the conventional modified pipe, so even if it is deformed by external pressure, it is difficult to break down. This has the effect that the reinforcement work or the like is not required and the construction is easy, and in particular, has a remarkable effect in a large-diameter pipe having a large elastic deformation amount.

この発明の実施の形態１である異形管の構造の要部破断側面図である。It is a principal part fracture side view of the structure of the deformed pipe which is Embodiment 1 of this invention. この発明の実施の形態１である異形管の構造の平面図である。It is a top view of the structure of the deformed pipe which is Embodiment 1 of this invention. この発明の実施の形態２である異形管の構造の要部断面図である。It is principal part sectional drawing of the structure of the deformed pipe which is Embodiment 2 of this invention. この発明の実施の形態２である異形管の構造の他の構成例の要部断面図である。It is principal part sectional drawing of the other structural example of the structure of the deformed pipe which is Embodiment 2 of this invention. この発明の実施例の試験方法を説明する要部側面図である。It is a principal part side view explaining the test method of the Example of this invention. この発明の実施例の各部寸法を示す要部破断平面図である。It is a principal part fracture | rupture top view which shows each part dimension of the Example of this invention. この発明の実施例の各部寸法を示す要部断面図である。It is principal part sectional drawing which shows each part dimension of the Example of this invention. この発明の実施例の試験結果を示すグラフである。It is a graph which shows the test result of the Example of this invention. 異形管の従来例を示す斜視図である。It is a perspective view which shows the prior art example of a deformed pipe. 従来の異形管の要部断面図である。It is principal part sectional drawing of the conventional deformed pipe.

符号の説明Explanation of symbols

１ 異形管
１ａ 主管
１ｂ 枝管
４ 接着層
５ 短冊状補強シート
６ 折線
７ 枝管側帯状テープ
８ 主管側帯状テープ
９ 弾性層 DESCRIPTION OF SYMBOLS 1 Modified pipe 1a Main pipe 1b Branch pipe 4 Adhesive layer 5 Strip-shaped reinforcement sheet 6 Folding line 7 Branch pipe side strip-shaped tape 8 Main pipe side strip-shaped tape 9 Elastic layer

Claims (1)

主管側面に枝管が連通するように水密に取付けられた異形管において、少なくとも前記枝管外面から前記主管外面にかけて、短冊状補強シートが、前記枝管側では、該枝管の軸方向に沿って、周方向に平行にオーバーラップさせて配列して貼着され、前記主管外面では前記主管と前記枝管の接続部を折れ線として前記主管外面に前記枝管を中心とした放射状に貼着され、さらに、前記枝管外面に延在する短冊状補強シート上と、前記主管外面に延在する短冊状補強シート上とには、それぞれ帯状テープ部材が周方向に巻回されてなる異形管の構造。 In a deformed pipe that is watertightly attached so that the branch pipe communicates with the side face of the main pipe, a strip-shaped reinforcing sheet extends along the axial direction of the branch pipe at least from the outer face of the branch pipe to the outer face of the main pipe. Te are adhered are arranged parallel to overlapped in a circumferential direction, wherein the main tube outer surface is adhered to a radially centered on the branch pipe to the main pipe outer surface of the connection portion of the branch pipe and the main pipe as a line Furthermore, a strip-shaped tape member is wound on the strip-shaped reinforcing sheet extending on the outer surface of the branch pipe and on the strip-shaped reinforcing sheet extending on the outer surface of the main pipe, respectively. Construction.
JP2003326994A 2003-09-19 2003-09-19 Shaped tube structure Expired - Fee Related JP4371748B2 (en)

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JP5266174B2 (en) * 2009-09-18 2013-08-21 株式会社水道技術開発機構 T-pipe replacement method for water pipes and new T-tube connection structure
JP5566951B2 (en) * 2011-06-14 2014-08-06 古河電気工業株式会社 Branch structure of resin piping and method for forming the same
JP2017009066A (en) * 2015-06-24 2017-01-12 積水化学工業株式会社 Irregular shape tube

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