JP2016098519A - Tube for injecting grout material and injection method - Google Patents

Tube for injecting grout material and injection method Download PDF

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JP2016098519A
JP2016098519A JP2014234660A JP2014234660A JP2016098519A JP 2016098519 A JP2016098519 A JP 2016098519A JP 2014234660 A JP2014234660 A JP 2014234660A JP 2014234660 A JP2014234660 A JP 2014234660A JP 2016098519 A JP2016098519 A JP 2016098519A
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grout
injection
tube
injection tube
injection hole
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JP6144246B2 (en
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小松　喜美
Yoshimi Komatsu
喜美 小松
利次 猪砂
Toshitsugu Inosako
利次 猪砂
幸徳 秋田
Yukinori Akita
幸徳 秋田
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JFE Bars and Shapes Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an injection tube which can be easily inserted into a grout injection hole by an operator, even in a limited space with intricate reinforcement structures in a construction work site and in an environment where the operator's attitude and the direction of the grout injection hole are restricted, and which can reduce a grout loss, and an injection method using the injection tube.SOLUTION: A tip of an injection tube 7 whose external diameter Dsatisfies D≤D≤D+4, while Dis an inner diameter of a grout injection hole, and is made of soft materials that can freely bend is inserted into the grout injection hole, and grout is fed under pressure from a rear end of the injection tube 7 and injected into the inside of a mechanical joint or anchor hardware.SELECTED DRAWING: Figure 1

Description

本発明は、建築工事や土木工事において、ねじ鉄筋を連結する機械式継手（いわゆるカプラー）や定着金物（いわゆるプレート）の内部に、グラウト材を注入するために使用する注入用チューブおよびそれを用いた注入方法に関するものである。   The present invention relates to an injection tube used for injecting a grout material into a mechanical joint (so-called coupler) or a fixing hardware (so-called plate) for connecting screw reinforcing bars in construction work or civil engineering work, and the use thereof. This is related to the injection method.

以下では、機械式継手をカプラー、定着金物をプレートと読みかえる。ただし、カプラーもプレートも、２本のねじ鉄筋を連結する位置（図３参照）にあるか、ねじ鉄筋の端部（図４参照）にあるかが違うだけであり、グラウト材の注入方法は全く同じである。よって、以下では、機械式継手と定着金物を代表してカプラーと記す。   In the following, mechanical joints will be read as couplers and fixing hardware as plates. However, the only difference between the coupler and the plate is whether the two screw rebars are connected (see Fig. 3) or the end of the screw rebar (see Fig. 4). Exactly the same. Therefore, in the following, a mechanical joint and a fixing hardware are represented as a coupler.

建築工事や土木工事において、図３に示すように、ねじ鉄筋１をカプラー２に螺合して連結する技術が広く使用されている。そして螺合した後、カプラー２に設けられたグラウト注入孔３からグラウト材を注入することによって、ねじ鉄筋１を固定する。それら一連の、カプラー２とねじ鉄筋１を螺合し、さらにカプラー２の内部にグラウト材を注入する作業は工事現場で行なうので、効率良くグラウト材を注入する技術が検討されている。   In construction work and civil engineering work, as shown in FIG. 3, a technique for screwing and connecting a screw rebar 1 to a coupler 2 is widely used. After screwing, the screw rebar 1 is fixed by injecting a grout material from a grout injection hole 3 provided in the coupler 2. Since a series of these operations of screwing the coupler 2 and the screw rebar 1 and injecting the grout material into the coupler 2 is performed at the construction site, a technique for injecting the grout material efficiently has been studied.

たとえば特許文献１には、(A)カプラーのグラウト注入孔に注入ガンを嵌めて、カプラーの内部にグラウト材を注入する技術、および、(B)注入ガンにフレキシブルチューブを連結して、カプラーの内部にグラウト材を注入する技術が開示されている。特許文献１に開示された(A)の技術は、注入ガンを直接グラウト注入孔に嵌めることになるので、工事現場の鉄筋構造体が入り組んだ限られた空間で、しかも作業員の姿勢やグラウト注入孔の向き等の制約を受けながら、確実に注入ガンをグラウト注入孔に嵌めて、グラウト材を注入するのは困難である。   For example, in Patent Document 1, (A) a technique in which an injection gun is fitted into a grout injection hole of a coupler and a grout material is injected into the coupler, and (B) a flexible tube is connected to the injection gun to connect the coupler. A technique for injecting a grout material inside is disclosed. In the technique (A) disclosed in Patent Document 1, since the injection gun is directly fitted into the grout injection hole, the posture of the worker and the grout are limited in a limited space where the reinforcing bar structure at the construction site is complicated. It is difficult to inject the grout material by securely fitting the injection gun into the grout injection hole while being restricted by the direction of the injection hole.

特許文献１に開示された(B)の技術は、注入ガンのミキサー吐出口とグラウト注入孔に嵌めるノズルとを連結するためにフレキシブルチューブを使用する。特許文献１の実施例によれば、フレキシブルチューブの具体的な長さは１〜３ｍであり、注入ガンとグラウト注入孔とが離れていても対応できるとしている。この技術は、フレキシブルチューブの先端のノズルが自在に変形しないとう問題がある。つまり、フレキシブルチューブを使用するので、作業員の姿勢やグラウト注入孔の向き等の制約は緩和されるものの、硬質なノズルはそれ自体に柔軟性がなく、グラウト注入孔に嵌めようとしてもその硬さのためにグラウト注入孔に滑らかに挿入できず、作業性が悪い。   The technique (B) disclosed in Patent Document 1 uses a flexible tube to connect a mixer discharge port of an injection gun and a nozzle fitted in a grout injection hole. According to the example of Patent Document 1, the specific length of the flexible tube is 1 to 3 m, and it can be handled even if the injection gun and the grout injection hole are separated. This technique has a problem that the nozzle at the tip of the flexible tube is not freely deformed. In other words, since a flexible tube is used, restrictions such as the posture of the worker and the orientation of the grout injection hole are alleviated, but the hard nozzle itself is not flexible, and even if it tries to fit into the grout injection hole, its hard For this reason, it cannot be smoothly inserted into the grout injection hole, resulting in poor workability.

特許文献１に開示された先端にノズルを装着したフレキシブルチューブの例を図２(a)に示し、市販されている階段状の硬質なノズル装着したフレキシブルチューブの例を図２(b)に示す。特許文献１には、フレキシブルチューブの外径の記載はないが、市販されている硬質（たとえばプラスチック製等）なノズルと組み合わせて使用するフレキシブルチューブの外径は12mmを超える。カプラー２（図３参照）に設けられるグラウト注入孔３の内径は５mmまたは６mmであることが多いので、図２(a)、(b)に示すように、円錐状や階段状を呈するノズルの先端をグラウト注入孔の内径に合わせている。   FIG. 2 (a) shows an example of a flexible tube with a nozzle attached to the tip disclosed in Patent Document 1, and FIG. 2 (b) shows an example of a commercially available flexible tube with a stair-like hard nozzle attached. . Patent Document 1 does not describe the outer diameter of the flexible tube, but the outer diameter of the flexible tube used in combination with a commercially available hard (for example, plastic) nozzle exceeds 12 mm. Since the inner diameter of the grout injection hole 3 provided in the coupler 2 (see FIG. 3) is often 5 mm or 6 mm, as shown in FIGS. 2 (a) and 2 (b), a nozzle having a conical or stepped shape is used. The tip is aligned with the inner diameter of the grout injection hole.

いずれにせよ、上記したように硬質なノズルは柔軟性がないので、作業者がノズルをグラウト注入孔に案内する作業も挿入する作業も困難である。   In any case, since the hard nozzle is not flexible as described above, it is difficult for the operator to guide and insert the nozzle into the grout injection hole.

そして注入作業が終了すると、フレキシブルチューブ５内に残留したグラウト材が硬化するので、フレキシブルチューブ５とともに廃棄せざるを得ない。このような理由で廃棄処分となるグラウト材（以下、グラウトロスという）は、フレキシブルチューブ５の内径が太いほど増えるという問題がある。   When the pouring operation is completed, the grout material remaining in the flexible tube 5 is cured, and must be discarded together with the flexible tube 5. For this reason, there is a problem that the grout material to be disposed of (hereinafter referred to as “groutros”) increases as the inner diameter of the flexible tube 5 increases.

特許第2743873号公報Japanese Patent No.2743873

本発明は、従来の技術の問題点を解消し、工事現場の鉄筋構造体が入り組んだ限られた空間で、作業員の姿勢やグラウト注入孔の向き等の制約を受ける環境において、作業員が注入用チューブをグラウト注入孔に容易に挿入することができ、しかもグラウトロスを減少することが可能な注入用チューブ、およびそれを用いた注入方法を提供することを目的とする。   The present invention solves the problems of the prior art, and in a limited space where the rebar structure at the construction site is complicated, the worker is restricted in the environment such as the posture of the worker and the direction of the grout injection hole. It is an object of the present invention to provide an injection tube in which an injection tube can be easily inserted into a grout injection hole and can reduce grouting, and an injection method using the same.

本発明者は、硬質なノズルを使用せずに、グラウト材をカプラー内に注入する技術について検討した。そして、
(a)軟質な素材からなり、ミキサーとの連結部からグラウト注入孔までが一体となっていて、所定の外径を有する注入用チューブをグラウト注入孔に挿入することによって、工事現場の鉄筋構造体が入り組んだ限られた空間で、作業員の姿勢やグラウト注入孔の向き等の制約を受ける環境においても、作業員が容易に挿入することができる、
(b)注入用チューブの好適な外径は、グラウト注入孔の内径との関係で規定することが可能で、従来よりも細くすることができる、
(c)注入用チューブが細くなれば、グラウトロスを減少することができる
ということが分かった。 The present inventor examined a technique for injecting a grout material into a coupler without using a hard nozzle. And
(a) It is made of a soft material, and the connection from the mixer to the grout injection hole is integrated, and an injection tube having a predetermined outer diameter is inserted into the grout injection hole, so that the reinforcing bar structure at the construction site In a limited space where the body is intricate, even in an environment subject to restrictions such as the posture of the worker and the direction of the grout injection hole, the worker can easily insert it.
(b) A suitable outer diameter of the injection tube can be defined in relation to the inner diameter of the grout injection hole, and can be made thinner than before.
(c) It was found that the grouting could be reduced if the injection tube became thinner.

本発明は、このような知見に基づいてなされたものである。   The present invention has been made based on such knowledge.

すなわち本発明は、ねじ鉄筋を螺合したカプラーの内部にグラウト材を注入するための注入用チューブであって、外径ＤT（mm）が(1)式を満足するとともに、自在に湾曲する軟質な素材からなるグラウト材の注入用チューブである。
ＤH≦ＤT≦ＤH＋４ ・・・(1)
ＤH：カプラーに設けられるグラウト注入孔の内径（mm）
ＤT：注入用チューブの外径（mm）
本発明の注入用チューブにおいては、その素材が熱可塑性樹脂であることが好ましい。また、グラウト材を注入するためにグラウト注入孔に挿入される先端部、あるいは先端部に加えて後端部が縮径されていることが好ましい。 That is, the present invention is an injection tube for injecting a grout material into a coupler screwed with a screw rebar, and an outer diameter D T (mm) satisfies the expression (1) and is freely curved. A grout injection tube made of a soft material.
D H ≦ D T ≦ D H +4 (1)
D H : Inner diameter of grout injection hole provided in coupler (mm)
D T : Outer tube outer diameter (mm)
In the injection tube of the present invention, the material is preferably a thermoplastic resin. Moreover, it is preferable that the rear end part is reduced in diameter in addition to the front-end | tip part inserted in a grout injection hole in order to inject | pour a grout material, or a front-end | tip part.

また本発明は、ねじ鉄筋を螺合したカプラーの内部に注入用チューブを介してグラウト材を注入する注入方法において、外径ＤTが(1)式を満足しかつ自在に湾曲する軟質な素材からなる注入用チューブの先端部をグラウト注入孔に挿入し、注入用チューブの後端からグラウト材を圧送してカプラーの内部に注入するグラウト材の注入方法である。
ＤH≦ＤT≦ＤH＋４ ・・・(1)
ＤH：カプラーに設けられるグラウト注入孔の内径（mm）
ＤT：注入用チューブの外径（mm）
本発明の注入方法においては、素材が熱可塑性樹脂である注入用チューブを使用することが好ましい。また、注入用チューブの先端部を加熱して縮径し、グラウト注入孔に注入用チューブを挿入することが好ましい。 The present invention also relates to an injection method in which a grout material is injected into an inside of a coupler screwed with a screw rebar through an injection tube, and the outer diameter DT satisfies the expression (1) and is a flexible material that is freely curved. In this method, the grout material is injected into the coupler by inserting the tip portion of the injection tube into the grout injection hole and pumping the grout material from the rear end of the injection tube.
D H ≦ D T ≦ D H +4 (1)
D H : Inner diameter of grout injection hole provided in coupler (mm)
D T : Outer tube outer diameter (mm)
In the injection method of the present invention, it is preferable to use an injection tube whose material is a thermoplastic resin. Further, it is preferable to heat the tip portion of the injection tube to reduce the diameter and insert the injection tube into the grout injection hole.

本発明によれば、工事現場の鉄筋構造体が入り組んだ限られた空間で、作業員の姿勢やグラウト注入孔の向き等の制約を受ける環境において、作業員が注入用チューブをグラウト注入孔に容易に挿入し、しかもグラウトロスを減少することができるので、産業上格段の効果を奏する。   According to the present invention, in a limited space where the reinforcing bar structure at the construction site is intricate, in an environment subject to restrictions such as the posture of the worker and the direction of the grout injection hole, the worker uses the injection tube as the grout injection hole. Since it can be easily inserted and the grouting can be reduced, it has a remarkable industrial effect.

本発明の注入用チューブの例を模式的に示す側面図である。It is a side view which shows typically the example of the tube for injection of this invention. 従来のフレキシブルチューブの例を模式的に示す側面図である。It is a side view which shows the example of the conventional flexible tube typically. ねじ鉄筋をカプラーで連結した例を模式的に示す側面図である。It is a side view which shows typically the example which connected the screw reinforcement with the coupler. ねじ鉄筋をプレートで連結した例を模式的に示す側面図である。It is a side view which shows typically the example which connected the screw reinforcement with the plate.

本発明を適用する注入用チューブは、図１に示すように、ミキサー４の吐出口に接続され、そのミキサー４の反対側端部には圧送機（図示せず）が配設される。ミキサー４は、有機系グラウト材を使用する場合に、薬液を混合するために使用するものである。無機系グラウト材を使用する場合は、ミキサー４を必ずしも使用する必要はない。   As shown in FIG. 1, the injection tube to which the present invention is applied is connected to the discharge port of the mixer 4, and a pressure feeder (not shown) is disposed at the opposite end of the mixer 4. The mixer 4 is used to mix a chemical solution when an organic grout material is used. When an inorganic grout material is used, the mixer 4 is not necessarily used.

以下では図１を参照して説明する。   Hereinafter, a description will be given with reference to FIG.

図１では、注入用チューブ７を明確に開示するために、その直径ＤT（mm）をグラウト注入孔３（図３参照）の内径ＤH（mm）よりも拡大して示すが、注入用チューブ７の直径ＤT（mm）とグラウト注入孔３の内径ＤH（mm）との関係は、下記の(1)式に示す通りである。なお、従来から使用されているカプラー２のグラウト注入孔３の内径ＤHは５mmまたは６mmであることが多いので、注入用チューブ７の直径ＤT（mm）の具体的な範囲は５〜10mmが好ましい。ただし、内径ＤH５mm、６mm以外のグラウト注入孔３を設けたカプラー２を使用する場合は、下記の(1)式を満足する直径ＤTを有する注入用チューブ７を使用する。
ＤH≦ＤT≦ＤH＋４ ・・・(1)
注入用チューブ７の直径ＤTがＤH＜ＤT≦ＤH＋４の範囲内であれば、注入用チューブ７の先端の直径を収縮（以下、縮径という）することによって、ノズルを使用せずに、グラウト注入孔３に挿入することができる。好ましくはＤH＜ＤT≦ＤH＋２の範囲内である。 In FIG. 1, in order to clearly disclose the injection tube 7, its diameter D T (mm) is shown larger than the inner diameter D H (mm) of the grout injection hole 3 (see FIG. 3). The relationship between the diameter D T (mm) of the tube 7 and the inner diameter D H (mm) of the grout injection hole 3 is as shown in the following equation (1). In addition, since the inner diameter D H of the grout injection hole 3 of the coupler 2 used in the past is often 5 mm or 6 mm, the specific range of the diameter D T (mm) of the injection tube 7 is 5 to 10 mm. Is preferred. However, when the coupler 2 provided with the grout injection hole 3 other than the inner diameter D H of 5 mm and 6 mm is used, the injection tube 7 having the diameter D T satisfying the following expression (1) is used.
D H ≦ D T ≦ D H +4 (1)
If the diameter D T of the injection tube 7 is within the range of D H <D T ≦ D H +4, the diameter of the tip of the injection tube 7 is contracted (hereinafter referred to as “reduced diameter”) so that the nozzle can be used. Without being inserted into the grout injection hole 3. Preferably, it is within the range of D H <D T ≦ D H +2.

しかも、注入用チューブ７は自在に湾曲する軟質な素材からなるので、工事現場の限られた空間で、作業員の姿勢やグラウト注入孔３の向き等の制約を受ける環境において、作業員が先端をグラウト注入孔３に容易に挿入することができる。なお注入用チューブ７の素材は、自在に湾曲する軟質な素材であれば良いが、縮径に伴う加工（たとえば加熱等）で注入用チューブ７の先端が閉塞すると、注入に支障を来す。したがって、縮径した後の先端の形状を健全な状態に保つために、熱可塑性樹脂（たとえばポリウレタン等）からなる注入用チューブ７を使用することが好ましい。   In addition, since the injection tube 7 is made of a soft material that can be freely bent, the operator is in a limited space at the construction site in an environment subject to restrictions such as the posture of the worker and the orientation of the grout injection hole 3. Can be easily inserted into the grout injection hole 3. The material of the infusion tube 7 may be a soft material that can be freely bent. However, if the tip of the infusion tube 7 is blocked by a process (for example, heating) associated with the diameter reduction, the infusion is hindered. Therefore, in order to keep the shape of the tip after the diameter reduction in a healthy state, it is preferable to use an injection tube 7 made of a thermoplastic resin (for example, polyurethane).

注入用チューブ７の直径ＤTがグラウト注入孔３の内径ＤHに一致する（ＤH＝ＤT）場合は、注入用チューブ７の先端を縮径する必要はない。ただしＤH＝ＤTであっても、注入用チューブ７を速やかに挿入するために、縮径することが好ましい。 When the diameter D T of the injection tube 7 matches the inner diameter D H of the grout injection hole 3 (D H = D T ), it is not necessary to reduce the diameter of the tip of the injection tube 7. However, even when D H = D T , it is preferable to reduce the diameter in order to quickly insert the injection tube 7.

注入用チューブ７が短すぎると、注入用チューブ７を把持する作業員の行動範囲を十分に確保するのが困難になる。一方で、長すぎると、グラウト材を圧送する際の摩擦抵抗が増大して、グラウト注入孔３から注入するのが困難になる。したがって注入用チューブ７の長さは、200〜1000mmの範囲内が好ましい。   If the injection tube 7 is too short, it will be difficult to ensure a sufficient range of action for the operator holding the injection tube 7. On the other hand, if the length is too long, the frictional resistance when pumping the grout material increases, and it becomes difficult to inject from the grout injection hole 3. Therefore, the length of the injection tube 7 is preferably in the range of 200 to 1000 mm.

注入用チューブ７が薄すぎると、グラウト材を圧送する際に、注入用チューブ７が破れ易くなる。一方で、厚すぎると、グラウト材の流路が狭くなるので、圧送が困難になるばかりでなく、自在に湾曲するという注入用チューブ７の特性が失なわれる。したがって注入用チューブ７の外皮の厚さは、１mm程度が好ましい。   If the injection tube 7 is too thin, the injection tube 7 is easily broken when the grout material is pumped. On the other hand, if the thickness is too large, the flow path of the grout material becomes narrow, so that not only is pressure feeding difficult, but the characteristics of the injection tube 7 that is freely curved are lost. Therefore, the thickness of the outer skin of the injection tube 7 is preferably about 1 mm.

このようにして注入用チューブ７の先端を縮径してグラウト注入孔３に挿入する時に、注入用チューブ７先端のテーパー部の外径とグラウト注入孔３の内径が一致するところまで、注入用チューブ７を挿入する。そして、注入用チューブ７の柔軟性が寄与して、注入用チューブ７先端とグラウト注入孔３が密着し、固定する。   When the distal end of the injection tube 7 is reduced in diameter and inserted into the grout injection hole 3 in this manner, the injection tube 7 is injected until the outer diameter of the tapered portion at the distal end of the injection tube 7 coincides with the inner diameter of the grout injection hole 3. Insert the tube 7. The flexibility of the injection tube 7 contributes, and the tip of the injection tube 7 and the grout injection hole 3 are in close contact and fixed.

本発明によれば、注入用チューブ７を細くすることができるので、グラウト材の流路が縮小し、その結果、グラウトロスを減少する効果も得られる。   According to the present invention, since the injection tube 7 can be made thinner, the flow path of the grout material is reduced, and as a result, the effect of reducing the grout loss is also obtained.

図３に示すようにカプラー２とねじ鉄筋１を螺合した後に、本発明を適用してグラウト材をカプラー２の内部に注入した。その手順について説明する。   As shown in FIG. 3, after the coupler 2 and the screw rebar 1 are screwed together, the present invention is applied to inject the grout material into the coupler 2. The procedure will be described.

まず注入用チューブ７の先端を、図１に示すように縮径した。使用した注入用チューブ７は、自在に湾曲する軟質な熱可塑性樹脂であるポリウレタンからなり、外径ＤTは６mm、長さ280mm、内径４mmであり、先端を加熱して外径4.8mmに縮径した。 First, the diameter of the tip of the injection tube 7 was reduced as shown in FIG. The injection tube 7 used is made of polyurethane, which is a soft thermoplastic resin that can be freely bent, and has an outer diameter DT of 6 mm, a length of 280 mm, and an inner diameter of 4 mm. Diameter.

次に、ねじ鉄筋１を螺合したカプラー２のグラウト注入孔３（内径ＤH：５mm）に、注入用チューブ７の先端を挿入した。このとき、注入用チューブ７を湾曲させた状態で容易にかつ速やかに挿入することができた。 Next, the tip of the injection tube 7 was inserted into the grout injection hole 3 (inner diameter D H : 5 mm) of the coupler 2 screwed with the screw rebar 1. At this time, the injection tube 7 could be easily and quickly inserted in a curved state.

次いで、有機系グラウト材をカプラー２に注入した。そして、有機系グラウト材がカプラー２内部に充満するまで、支障なく注入を続けることができた。   Next, an organic grout material was injected into the coupler 2. The injection could be continued without any trouble until the organic grout material was filled in the coupler 2.

以上が発明例である。   The above is an example of the invention.

これに対して比較のために、発明例と同じ材質からなる直径14mmのチューブの先端を加熱して、発明例と同様に外径4.8mmに縮径した（図示せず）。しかし加熱による縮径量が大きすぎて内径を確保できず、有機系グラウト材の注入に使用できなかった。   On the other hand, for comparison, the tip of a tube having a diameter of 14 mm made of the same material as that of the inventive example was heated to reduce the outer diameter to 4.8 mm as in the inventive example (not shown). However, the amount of diameter reduction by heating was too large to secure the inner diameter, and could not be used for injecting organic grout material.

そこで、その直径14mmのチューブ（発明例と同様に長さ280mm、外径６mm）の先端にプラスチック製のノズル６を装着（図２(b)参照）して、グラウト注入孔３に嵌めた。このとき、ノズル６に柔軟性がなく、その硬さのために挿入が容易ではなく、発明例の注入用チューブ７を使用した場合に比べて、２倍の作業時間を要した。   Therefore, a plastic nozzle 6 was attached to the tip of a tube having a diameter of 14 mm (same as the invention example, length 280 mm, outer diameter 6 mm) (see FIG. 2 (b)) and fitted into the grout injection hole 3. At this time, the nozzle 6 was not flexible and was not easily inserted due to its hardness, and required twice as much work time as the case of using the injection tube 7 of the invention example.

１ ねじ鉄筋
２ カプラー
３ グラウト注入孔
４ ミキサー
５ フレキシブルチューブ
６ ノズル
７ 注入用チューブ 1 Screw Reinforcement 2 Coupler 3 Grout Injection Hole 4 Mixer 5 Flexible Tube 6 Nozzle 7 Injection Tube

Claims (6)

ねじ鉄筋を螺合した機械式継手または定着金物の内部にグラウト材を注入するための注入用チューブであって、外径ＤT（mm）が(1)式を満足するとともに、自在に湾曲する軟質な素材からなることを特徴とするグラウト材の注入用チューブ。
ＤH≦ＤT≦ＤH＋４ ・・・(1)
ＤH：グラウト注入孔の内径（mm）
ＤT：注入用チューブの外径（mm） An injection tube for injecting a grout material into the inside of a mechanical joint or fixing metal fitting screwed with a screw rebar, and the outer diameter D T (mm) satisfies the equation (1) and is freely curved. A grout injection tube characterized by being made of a soft material.
D H ≦ D T ≦ D H +4 (1)
D H : Inner diameter of grout injection hole (mm)
D T : Outer tube outer diameter (mm) 前記素材が熱可塑性樹脂であることを特徴とする請求項１に記載のグラウト材の注入用チューブ。   2. The grout material injection tube according to claim 1, wherein the material is a thermoplastic resin. 前記グラウト材を注入するために前記グラウト注入孔に挿入される先端部、あるいは該先端部に加えて後端部が縮径されていることを特徴とする請求項１または２に記載のグラウト材の注入用チューブ。   The grout material according to claim 1 or 2, wherein a diameter of a front end portion inserted into the grout injection hole for injecting the grout material, or a rear end portion in addition to the front end portion is reduced. Tube for injection. ねじ鉄筋を螺合した機械式継手または定着金物の内部に注入用チューブを介してグラウト材を注入する注入方法において、外径ＤTが(1)式を満足しかつ自在に湾曲する軟質な素材からなる前記注入用チューブの先端部をグラウト注入孔に挿入し、前記注入用チューブの後端から前記グラウト材を圧送して前記機械式継手または前記定着金物の内部に注入することを特徴とするグラウト材の注入方法。
ＤH≦ＤT≦ＤH＋４ ・・・(1)
ＤH：グラウト注入孔の内径（mm）
ＤT：注入用チューブの外径（mm） In the injection method in which the grout material is injected into the interior of the mechanical joint or fixing metal fitting screwed with the screw rebar through the injection tube, the outer diameter DT satisfies the equation (1) and is a flexible material that can be freely bent The tip end portion of the injection tube is inserted into a grout injection hole, and the grout material is pumped from the rear end of the injection tube and injected into the mechanical joint or the fixing hardware. Grouting material injection method.
D H ≦ D T ≦ D H +4 (1)
D H : Inner diameter of grout injection hole (mm)
D T : Outer tube outer diameter (mm) 前記素材が熱可塑性樹脂である前記注入用チューブを使用することを特徴とする請求項４に記載のグラウト材の注入方法。   5. The grout material injection method according to claim 4, wherein the injection tube is made of a thermoplastic resin. 前記注入用チューブの先端部を加熱して縮径し、前記グラウト注入孔に前記注入用チューブを挿入することを特徴とする請求項５に記載のグラウト材の注入方法。   6. The method of injecting a grout material according to claim 5, wherein a diameter of the tip of the injection tube is reduced by heating, and the injection tube is inserted into the grout injection hole.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51127531A (en) * 1975-04-26 1976-11-06 Sumitomo Metal Ind Reinforced joint
US4744193A (en) * 1985-02-27 1988-05-17 Taisei Corporation Method of sealing water leakage in concrete structures
JP2743873B2 (en) * 1995-06-29 1998-04-22 東京鐵鋼株式会社 Method and apparatus for injecting two-component mixed grout into rebar joint
JPH1181678A (en) * 1997-09-03 1999-03-26 Tokyo Tekko Co Ltd Grouting device for reinforcing bar joint
JP2003003607A (en) * 2001-06-22 2003-01-08 Tokyo Tekko Co Ltd Check valve and reinforcement connector
JP2003096974A (en) * 2001-09-26 2003-04-03 Ito Seitetsusho:Kk Method for injecting grout material for reinforcement joint
JP2008231679A (en) * 2007-03-16 2008-10-02 Ohbayashi Corp Tube form for forming grout injection/exhaust port, reinforced concrete member created by using the form, and creation method for the reinforced concrete member
JP2010168850A (en) * 2009-01-26 2010-08-05 Toda Constr Co Ltd Supporting method of mold for grout of pillar main reinforcement joint, position fixation jig, and mold unit for grout

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51127531A (en) * 1975-04-26 1976-11-06 Sumitomo Metal Ind Reinforced joint
US4744193A (en) * 1985-02-27 1988-05-17 Taisei Corporation Method of sealing water leakage in concrete structures
JP2743873B2 (en) * 1995-06-29 1998-04-22 東京鐵鋼株式会社 Method and apparatus for injecting two-component mixed grout into rebar joint
JPH1181678A (en) * 1997-09-03 1999-03-26 Tokyo Tekko Co Ltd Grouting device for reinforcing bar joint
JP2003003607A (en) * 2001-06-22 2003-01-08 Tokyo Tekko Co Ltd Check valve and reinforcement connector
JP2003096974A (en) * 2001-09-26 2003-04-03 Ito Seitetsusho:Kk Method for injecting grout material for reinforcement joint
JP2008231679A (en) * 2007-03-16 2008-10-02 Ohbayashi Corp Tube form for forming grout injection/exhaust port, reinforced concrete member created by using the form, and creation method for the reinforced concrete member
JP2010168850A (en) * 2009-01-26 2010-08-05 Toda Constr Co Ltd Supporting method of mold for grout of pillar main reinforcement joint, position fixation jig, and mold unit for grout

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