JP5150354B2 - Method for confirming filling state of filler, method for fixing fixing metal to reinforcing bar, fixing metal, PC member - Google Patents
Method for confirming filling state of filler, method for fixing fixing metal to reinforcing bar, fixing metal, PC member Download PDFInfo
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- JP5150354B2 JP5150354B2 JP2008122598A JP2008122598A JP5150354B2 JP 5150354 B2 JP5150354 B2 JP 5150354B2 JP 2008122598 A JP2008122598 A JP 2008122598A JP 2008122598 A JP2008122598 A JP 2008122598A JP 5150354 B2 JP5150354 B2 JP 5150354B2
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- 239000002184 metal Substances 0.000 title claims description 131
- 230000003014 reinforcing effect Effects 0.000 title claims description 104
- 239000000945 filler Substances 0.000 title claims description 44
- 238000000034 method Methods 0.000 title claims description 37
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 239000004567 concrete Substances 0.000 claims description 11
- 238000012790 confirmation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011440 grout Substances 0.000 description 42
- 238000003780 insertion Methods 0.000 description 11
- 230000037431 insertion Effects 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Description
本発明は、コンクリート部材内に埋設された定着金物に鉄筋を螺合させ、定着金物の内部に充填材を充填することにより、定着金物を鉄筋に固定する方法及び定着金物内に充填された充填材の充填状況の確認方法に関する。 The present invention relates to a method of fixing a fixing metal to a reinforcing bar by screwing a reinforcing bar into a fixing metal embedded in a concrete member, and filling the inside of the fixing metal with a filler, and a filling filled in the fixing metal. The present invention relates to a method for confirming the state of material filling.
従来より、例えば、鉄筋コンクリート造の柱梁構造における一方から梁が接続されるような仕口部では、梁主筋に作用する引張力に抵抗できるように、梁主筋の端部に定着金物を取り付けておき、この定着金物を仕口部を構成するコンクリート内に埋設することにより、梁主筋を仕口部に定着させていた。 Conventionally, for example, in joints where a beam is connected from one side in a reinforced concrete column beam structure, fixing hardware is attached to the end of the beam reinforcement so that it can resist the tensile force acting on the beam reinforcement. In addition, by embedding this fixing metal in the concrete constituting the joint part, the main beam of the beam was fixed to the joint part.
このように鉄筋に定着金物を取り付ける際には、鉄筋に作用する引張力が確実に定着金物に伝達されるように、定着金物を強固に鉄筋に固定する必要がある。そこで、例えば、非特許文献１には、鉄筋に定着金物を固定する方法として、鉄筋に定着金物を螺合させた後、鉄筋と定着金物との隙間にグラウトを充填する方法が記載されている。この方法では、グラウトが上記隙間に充填されていることを確認するため、定着金物の両端から溢れ出すまでグラウトを充填する必要がある。 Thus, when attaching the fixing metal to the reinforcing bar, it is necessary to firmly fix the fixing metal to the reinforcing bar so that the tensile force acting on the reinforcing bar is reliably transmitted to the fixing metal. Therefore, for example, Non-Patent Document 1 describes a method of fixing a fixing metal to a reinforcing bar by screwing the fixing metal to the reinforcing bar and then filling a grout in a gap between the reinforcing bar and the fixing metal. . In this method, in order to confirm that the grout is filled in the gap, it is necessary to fill the grout until it overflows from both ends of the fixing metal.
このように鉄筋に定着金物を取り付ける際には、鉄筋に作用する引張力が確実に定着金物に伝達されるように、定着金物を強固に鉄筋に固定する必要がある。そこで、例えば、非特許文献１には、鉄筋に定着金物を固定する方法として、鉄筋に定着金物を螺合させた後、鉄筋と定着金物との隙間にグラウトを充填する方法が記載されている。この方法では、グラウトが上記隙間に充填されていることを確認するため、定着金物の両端から溢れ出すまでグラウトを充填する必要がある。
なお、本願出願人の一社は鉄筋を定着金物を用いて、コンクリートに定着する方法として、特許文献１の図７に示すような方法を提案している。
One company of the present applicant has proposed a method shown in FIG. 7 of Patent Document 1 as a method for fixing a reinforcing bar to concrete using a fixing metal.
しかしながら、上記の方法では、定着金物の両端側からグラウトが溢れ出るのを視認する必要があるが、定着金物をコンクリート部材内に埋設してしまうと、コンクリート部材の内部側からグラウトが溢れ出るのを確認することができない。 However, in the above method, it is necessary to visually confirm that the grout overflows from both ends of the fixing metal. However, if the fixing metal is embedded in the concrete member, the grout overflows from the inner side of the concrete member. Can not be confirmed.
本発明は、上記の問題に鑑みなされたものであり、その目的は、定着金物がコンクリート部材内に埋設された場合のように、定着金物の一方からしかグラウトの溢れ出しを視認できない状況であっても、定着金物内にグラウトが充填されたことを確認できるようにすることである。 The present invention has been made in view of the above problems, and its purpose is to provide a situation where the overflow of the grout is visible only from one side of the fixing hardware, such as when the fixing hardware is embedded in a concrete member. However, it is possible to confirm that the grout is filled in the fixing metal.
本発明の充填材の充填状態の確認方法は、内周面に螺条が形成された貫通孔を有する定着金物を、外周面に螺条を有する鉄筋の外周に螺合させ、前記貫通孔に通じる注入孔より前記定着金物と前記鉄筋との隙間に充填材を充填することにより前記鉄筋に前記定着金物を固定する際に、前記隙間に充填材が充填されたことを確認する方法であって、前記定着金物を、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成しておき、前記充填材が前記貫通孔の他端側から溢れ出るのを確認することを特徴とする。
なお、充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるとは、後述するように定着金物の他端側にナットを取り付けた場合には、定着金物の一端側端面よりもナットの他端側端面より溢れ出し難くなることをいう。
In the method for confirming the filling state of the filler according to the present invention, a fixing metal having a through hole having a thread formed on the inner peripheral surface is screwed onto the outer periphery of a reinforcing bar having a thread on the outer peripheral surface, and the through hole is inserted into the through hole. A method of confirming that the gap is filled with the filler when the fixing metal is fixed to the reinforcing bar by filling the gap between the fixing metal and the reinforcing bar through the injection hole leading to the reinforcing bar. The fixing metal is configured so that the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal, and the filler is formed from the other end side of the through hole. It is characterized by confirming overflow.
Note that the filler is less likely to overflow from the other end side than the one end side of the fixing metal when the nut is attached to the other end of the fixing metal as will be described later than the end surface of the fixing metal. It means that it is difficult to overflow from the end face of the other end of the nut.
上記の方法において、前記定着金物は、前記他端側が部材表面に露出するようにＰＣ部材に埋設されていてもよい。また、前記定着金物は、前記注入孔が前記定着金物の軸方向中央部よりも前記一端側に形成されていることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていてもよい。
なお、部材表面に露出するとは、ＰＣ部材表面に凹部を設けておき、この凹部内に露出するような場合も含むものである。
In the above method, the fixing hardware may be embedded in the PC member so that the other end side is exposed on the surface of the member. In the fixing metal, the injection hole is formed on the one end side with respect to the central portion in the axial direction of the fixing metal, so that the filler filled in the gap is different from the one end side of the fixing metal. You may be comprised so that it may become difficult to overflow from an end side.
Note that “exposed on the surface of the member” includes a case where a concave portion is provided on the surface of the PC member and the concave portion is exposed in the concave portion.
また、前記定着金物は、前記他端側に前記鉄筋と螺合するとともに、前記定着金物と当接するようにナットを取り付けることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていてもよい。 Further, the fixing metal is screwed to the reinforcing bar on the other end side, and a nut is attached so as to come into contact with the fixing metal, so that the filling material filled in the gap is made from one end side of the fixing metal. Also, it may be configured so as not to overflow from the other end side.
また、前記定着金物は、前記鉄筋にナットを螺合させ、前記ナットを前記他端側に締め付けることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていてもよい。 Further, the fixing metal is screwed into the reinforcing bar with a nut, and the nut is tightened to the other end side so that the filler filled in the gap overflows from the other end side rather than the one end side of the fixing metal object. You may be comprised so that it may become difficult to take out.
また、本発明の鉄筋に定着金物を固定する方法は、内周面に螺条が形成された貫通孔を有する定着金物を、外周面に螺条を有する鉄筋の外周に螺合させ、前記貫通孔に通じる注入孔より前記定着金物と前記鉄筋との隙間に充填材を充填することにより前記鉄筋に前記定着金物を固定する工法であって、前記定着金物を、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成しておき、前記定着金物を前記鉄筋に螺合させ、前記貫通孔の他端側から溢れ出るまで前記充填材を充填することを特徴とする。 In the method of fixing the fixing metal to the reinforcing bar of the present invention, the fixing metal having a through hole having a thread formed on the inner peripheral surface is screwed onto the outer periphery of the reinforcing bar having a thread on the outer peripheral surface, and the penetration A method of fixing the fixing metal to the reinforcing bar by filling a filler into a gap between the fixing metal and the reinforcing bar from an injection hole communicating with the hole, the filler filling the gap with the fixing metal Is configured so that it is less likely to overflow from the other end side than the one end side of the fixing metal, and the fixing metal is screwed into the rebar and the filler is used until it overflows from the other end side of the through hole. It is characterized by filling.
また、本発明の定着金物は、内周面に螺条が形成された貫通孔を有し、外周面に螺条を有する鉄筋の外周に螺合され、前記貫通孔に通じる注入孔より前記定着金物と前記鉄筋との隙間に充填材が充填されることにより前記鉄筋の端部に固定されて用いられる、前記鉄筋をコンクリート部材に定着させるための定着金物であって、前記注入孔が前記定着金物の軸方向中央部よりも一端側に形成されていることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていることを特徴とする。 Further, the fixing metal of the present invention has a through hole having a thread formed on the inner peripheral surface, is screwed onto the outer periphery of a reinforcing bar having a thread on the outer peripheral surface, and is fixed to the fixing hole from the injection hole that communicates with the through hole. A fixing hardware for fixing the reinforcing bar to a concrete member, which is used by being fixed to an end of the reinforcing bar by filling a filler in a gap between the hardware and the reinforcing bar, the injection hole being the fixing hole By being formed at one end side from the central portion in the axial direction of the hardware, it is configured so that the filler filled in the gap is less likely to overflow from the other end side than from the one end side of the fixing hardware. It is characterized by.
また、本発明のＰＣ部材は、内周面に螺条が形成された貫通孔を有し、外周面に螺条を有する鉄筋の外周に螺合され、前記貫通孔に通じる注入孔より前記定着金物と前記鉄筋との隙間に充填材が充填されることにより前記鉄筋の端部に固定されて用いられる、前記鉄筋を定着させるための定着金物が部材内に埋設されたＰＣ部材であって、前記定着金物は、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されており、前記他端側が部材表面に露出するように埋設されていることを特徴とする。 Further, the PC member of the present invention has a through-hole having a thread formed on the inner peripheral surface, is screwed to the outer periphery of a reinforcing bar having a thread on the outer peripheral surface, and is fixed to the fixing hole from the injection hole communicating with the through-hole. A PC member in which a fixing metal for fixing the reinforcing bar is embedded in the member, and is used by being fixed to an end of the reinforcing bar by filling a filler in a gap between the metal and the reinforcing bar, The fixing metal is configured such that the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal, and the other end side is embedded so as to be exposed on the surface of the member. It is characterized by.
本発明によれば、定着金物に充填された充填材が一端側よりも他端側から溢れ出し難くなるように構成されているため、充填材が定着金物の他端側から溢れ出た際には、一端側からもグラウトが溢れ出ていることとなる。これにより、例えば、定着金物がコンクリート部材内に埋設された場合のように、定着金物の一方からしか充填材の溢れ出しを確認することができない状況であっても、その一方から充填材が溢れ出るのを確認することで、定着金物内に充填材が十分充填されていることを確認できる。 According to the present invention, since the filler filled in the fixing metal is configured to be less likely to overflow from the other end side than from the one end side, when the filler overflows from the other end side of the fixing metal. The grout overflows from one end side. Thereby, for example, even when the overflow of the filler can be confirmed only from one side of the fixing metal, such as when the fixing metal is embedded in the concrete member, the filler overflows from one side. By confirming the exit, it can be confirmed that the fixing metal is sufficiently filled with the filler.
以下、本発明の充填材の充填状態の確認方法の一実施形態を図面を参照しながら詳細に説明する。
図１は、ＰＣ仕口部材１０の一側面にＰＣ梁部材２０が接続された様子を示す水平断面図である。同図に示すように、ＰＣ仕口部材１０には鉄筋挿入孔１１が形成されており、この鉄筋挿入孔１１の端部には定着金物３０が埋設されている。また、ＰＣ仕口部材１０の上記一側面とは反対側の表面には、定着金物３０の端面が露出するように凹部１２が形成されている。一方、ＰＣ梁部材２０の内部には梁主筋２１が埋設されており、梁主筋２１の端部には機械式継手２２が接続されている。この機械式継手２２の鉄筋挿入孔２３はＰＣ梁部材２０のＰＣ仕口部材１０側の端面に開口している。そして、ＰＣ梁部材２０とＰＣ仕口部材１０とは、鉄筋４０を、その一端が機械式継手２２の鉄筋挿入孔２３内に到達するように設置して、他端部に定着金物３０を固定し、ＰＣ仕口部材１０の鉄筋挿入孔１１及び機械式継手２２内にグラウトを充填し、さらに、ＰＣ仕口部材１０とＰＣ梁部材２０との間の目地にグラウトを充填することにより接続される。なお、鉄筋４０は、外周面に螺条４１が形成された異形鉄筋であり、外周面の一部に平面状の欠損部が形成されている。また、ＰＣ仕口部材１０及びＰＣ梁部材２０の接合端面にコッター等を設けてもよい。
Hereinafter, an embodiment of a method for confirming a filling state of a filler according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a horizontal sectional view showing a state in which a PC beam member 20 is connected to one side surface of a PC joint member 10. As shown in the figure, a reinforcing bar insertion hole 11 is formed in the PC joint member 10, and a fixing hardware 30 is embedded in the end of the reinforcing bar insertion hole 11. Further, a recess 12 is formed on the surface of the PC joint member 10 opposite to the one side surface so that the end surface of the fixing metal 30 is exposed. On the other hand, a beam main bar 21 is embedded inside the PC beam member 20, and a mechanical joint 22 is connected to an end of the beam main bar 21. The reinforcing bar insertion hole 23 of the mechanical joint 22 is opened on the end face of the PC beam member 20 on the PC joint member 10 side. Then, the PC beam member 20 and the PC joint member 10 are provided with the reinforcing bar 40 so that one end thereof reaches the reinforcing bar insertion hole 23 of the mechanical joint 22, and the fixing hardware 30 is fixed to the other end part. Then, the reinforcing bar insertion hole 11 and the mechanical joint 22 of the PC joint member 10 are filled with grout, and the joint between the PC joint member 10 and the PC beam member 20 is filled with grout. The The reinforcing bar 40 is a deformed reinforcing bar in which a thread 41 is formed on the outer peripheral surface, and a flat defect portion is formed on a part of the outer peripheral surface. Further, a cotter or the like may be provided on the joint end face of the PC joint member 10 and the PC beam member 20.
図２は、図１のＡ部の拡大断面図である。同図に示すように、定着金物３０は、内周面に螺条３１が形成された貫通孔３０Ａが形成され、端部に鍔部３２が形成された鋼製の部材である。定着金物３０には、外周面から貫通孔３０Ａまで到達するような注入孔３３が形成されている。 FIG. 2 is an enlarged cross-sectional view of a part A in FIG. As shown in the figure, the fixing hardware 30 is a steel member in which a through hole 30A in which a thread 31 is formed on an inner peripheral surface is formed and a flange portion 32 is formed on an end portion. The fixing metal 30 is formed with an injection hole 33 that reaches the through hole 30A from the outer peripheral surface.
定着金物３０は、貫通孔３０Ａ内の螺条３１と鉄筋４０の外周面の螺条４１とを螺合させ、注入孔３３から定着金物３０と鉄筋４０との隙間にグラウト６０を充填することにより、鉄筋４０に固定されている。かかる構成により、定着金物３０は鉄筋４０に強固に固定され、定着金物３０に鉄筋４０に作用する引張力が伝達され、定着金物３０がその鍔部３２により反力を受けるため、引張力に抵抗することができる。 The fixing metal 30 is formed by screwing the thread 31 in the through hole 30 </ b> A and the thread 41 on the outer peripheral surface of the reinforcing bar 40 and filling the grout 60 in the gap between the fixing metal 30 and the reinforcing bar 40 through the injection hole 33. It is fixed to the reinforcing bar 40. With this configuration, the fixing hardware 30 is firmly fixed to the reinforcing bar 40, a tensile force acting on the reinforcing bar 40 is transmitted to the fixing metal 30, and the fixing hardware 30 receives a reaction force by the flange portion 32, and thus resists the tensile force. can do.
ここで、鉄筋４０と定着金物３０との間で引張力が伝達されるようにするには、定着金物３０と鉄筋４０と隙間にグラウト６０が確実に充填されている必要があるため、施工の際に、グラウト６０が充填されていることを確認しなければならない。このような確認は、従来、充填したグラウト６０が定着金物３０の両側から溢れ出るのを視認することにより行っていた。しかしながら、上記のように定着部材３０をＰＣ仕口部材１０内に埋設してしまうと、定着金物３０のＰＣ仕口部材１０の内部側からグラウト６０が溢れ出るのを視認できないため、従来の方法によりグラウト６０が充填されたことを確認することができない。 Here, in order to transmit a tensile force between the reinforcing bar 40 and the fixing metal member 30, it is necessary that the grout 60 is reliably filled in the gap between the fixing metal member 30 and the reinforcing bar 40. In this case, it must be confirmed that the grout 60 is filled. Such confirmation is conventionally performed by visually checking that the filled grout 60 overflows from both sides of the fixing hardware 30. However, if the fixing member 30 is embedded in the PC joint member 10 as described above, the overflow of the grout 60 from the inside of the PC joint member 10 of the fixing hardware 30 cannot be visually recognized. Therefore, it cannot be confirmed that the grout 60 is filled.
本実施形態のグラウトの充填状態の確認方法は、このようにＰＣ部材１０内に埋設された定着金物３０に鉄筋４０の端部を固定し、鉄筋３０の端部を定着させる工法において、ＰＣ部材１０内に埋設された定着金物３０内に充填されたグラウト６０の充填状態を確認する方法である。以下、本実施形態のグラウトの充填状態の確認方法を用いて、鉄筋４０に定着金物３０を固定する方法を説明する。 The method for confirming the grout filling state of the present embodiment is such that the end of the reinforcing bar 40 is fixed to the fixing metal 30 embedded in the PC member 10 and the end of the reinforcing bar 30 is fixed. 10 is a method for confirming the filling state of the grout 60 filled in the fixing metal 30 embedded in the steel plate 10. Hereinafter, a method of fixing the fixing hardware 30 to the reinforcing bar 40 will be described by using the grout filling confirmation method of the present embodiment.
まず、図３に示すように、鉄筋４０の螺条４１と定着金物３０の貫通孔３０Ａ内の螺条３１とを螺合させ、鉄筋４０を回転させることにより、同図に示すように、鉄筋４０の端部がＰＣ仕口部材１０の凹部１２内に位置し、その端部が定着金物３０の鍔部３２側の端面より突出した状態となるまで、鉄筋４０を鉄筋挿入孔１１に挿入する。 First, as shown in FIG. 3, the thread 41 of the reinforcing bar 40 and the thread 31 in the through-hole 30A of the fixing hardware 30 are screwed together, and the reinforcing bar 40 is rotated. The reinforcing bar 40 is inserted into the reinforcing bar insertion hole 11 until the end of 40 is located in the recess 12 of the PC fitting member 10 and the end protrudes from the end surface of the fixing hardware 30 on the flange 32 side. .
次に、図４に示すように、凹部１２内において、ナット５０を鉄筋４０の螺条４１と螺合させることにより、定着金物３０の鍔部３２側の端面と当接させ、この状態からさらに締め付ける。これにより、図４に示すように、ナット５０の螺条５１の山のＰＣ仕口部材１０の表面側（図中左側；以下、部材表面側という）の面と、鉄筋４０の螺条４１の山のＰＣ仕口部材１０の中心側（図中右側；以下、部材内側という）の面とが当接し、ナット５０内では鉄筋４０の螺条４１の山の部材表面側に隙間５４が形成されることとなる。また、定着金物３０の貫通孔３０Ａの内周に形成された螺条３１の山の部材内側の面と、鉄筋４０表面の螺条４１の山の部材表面側の面とが当接することとなり、定着金物３０内では鉄筋４０の螺条４１の山の部材内側に隙間３４が形成されることとなる。 Next, as shown in FIG. 4, in the recess 12, the nut 50 is screwed with the thread 41 of the reinforcing bar 40 to be brought into contact with the end surface of the fixing hardware 30 on the flange 32 side. tighten. As a result, as shown in FIG. 4, the surface of the PC joint member 10 at the top of the thread 51 of the nut 50 (left side in the figure; hereinafter referred to as the member surface side) and the thread 41 of the reinforcing bar 40. The center side (right side in the figure; hereinafter referred to as the inside of the member) of the mountain PC joint member 10 abuts, and a gap 54 is formed in the nut 50 on the member surface side of the thread 41 of the reinforcing bar 40 in the nut 50. The Rukoto. Further, the inner surface of the thread 31 of the thread 31 formed on the inner periphery of the through hole 30A of the fixing metal 30 and the surface of the thread 41 of the thread 41 on the surface of the reinforcing bar 40 come into contact with each other. In the fixing hardware 30, a gap 34 is formed inside the crest member of the thread 41 of the reinforcing bar 40.
次に、図５に示すように、ＰＣ仕口部材１０に設けられた孔１３を通じて、注入孔３３から定着金物３０内にグラウト６０を注入する。ここで、ナット５０を定着金物３０の鍔部３２側の表面に当接するように取り付けているため、注入孔３３から定着金物３０の部材内側の端面までの長さよりも定着金物３０の注入孔３３からナット５０の部材表面側の端面までの長さの方が大きい。 Next, as shown in FIG. 5, the grout 60 is injected into the fixing metal 30 from the injection hole 33 through the hole 13 provided in the PC joint member 10. Here, since the nut 50 is attached so as to be in contact with the surface of the fixing metal 30 on the flange 32 side, the injection hole 33 of the fixing metal 30 is longer than the length from the injection hole 33 to the end surface inside the member of the fixing metal 30. To the end surface on the member surface side of the nut 50 is larger.
さらに、上記のように定着金物３０の内部では鉄筋４０表面の螺条４１の山の部材内側に隙間３４が形成され、ナット５０の内部では、鉄筋４０表面の螺条４１の山の部材表面側に隙間５４が形成される。すなわち、定着金物３０内部とナット５０内部とでは、鉄筋４０の螺条４１の山に対する隙間３４、５４の形成される位置が逆になり、隙間３４と隙間５４とはナット５０と定着金物３０との境界部において互いに遮断される。したがって、注入孔３３から注入されたグラウト６０は、定着金物３０内では隙間３４を通して貫通孔３０Ａ内にスムーズに充填されるものの、ナット５０内へは隙間３４から隙間５４へと流れ込むことができないので、鉄筋４０の螺条４１の欠損部などの狭い隙間を通らなければ、ナット５０内の隙間５４に流れ込むことができない。このため、グラウト６０は、ナット５０の表面よりも先に定着金物３０の部材内側端部まで到達することとなる。 Further, as described above, the gap 34 is formed inside the thread 41 of the thread 41 on the surface of the reinforcing bar 40 inside the fixing metal 30, and the thread member 41 surface side of the thread 41 on the surface of the reinforcing bar 40 is formed inside the nut 50. A gap 54 is formed in the gap. That is, the positions where the gaps 34 and 54 are formed with respect to the crests of the thread 41 of the reinforcing bar 40 are reversed between the inside of the fixing metal 30 and the inside of the nut 50. Are cut off from each other at the boundary. Therefore, the grout 60 injected from the injection hole 33 is smoothly filled into the through hole 30A through the gap 34 in the fixing metal 30, but cannot flow into the nut 50 from the gap 34 to the gap 54. If it does not pass through a narrow gap such as a defective portion of the thread 41 of the reinforcing bar 40, it cannot flow into the gap 54 in the nut 50. For this reason, the grout 60 reaches the member inner end of the fixing hardware 30 before the surface of the nut 50.
これらの理由により、定着金物３０の注入孔３３に充填されたグラウト６０は、図５に示すように、まず、定着金物３０の部材内側の端部から溢れ出し、その後、図６に示すように、ナット５０の表面から溢れ出すこととなる。このため、ナット５０の表面からグラウト６０が溢れ出れば、定着金物３０内にグラウト６０が完全に充填されたといえる。
なお、上記のように定着金物３０内にグラウト６０を充填した後、必要に応じて、ＰＣ仕口部材１０の表面に形成された凹部１２にグラウトを充填してもよい。
以上の工程により、定着金物３０が鉄筋４０の端部に強固に固定され、鉄筋４０をＰＣ仕口部材１０に定着させることができる。
For these reasons, the grout 60 filled in the injection hole 33 of the fixing metal 30 overflows first from the inner end of the fixing metal 30 as shown in FIG. 5, and then, as shown in FIG. , It overflows from the surface of the nut 50. For this reason, if the grout 60 overflows from the surface of the nut 50, it can be said that the grout 60 is completely filled in the fixing metal 30.
In addition, after filling the fixing metal 30 with the grout 60 as described above, the grout may be filled in the recess 12 formed on the surface of the PC joint member 10 as necessary.
Through the above steps, the fixing hardware 30 is firmly fixed to the end of the reinforcing bar 40, and the reinforcing bar 40 can be fixed to the PC joint member 10.
以上説明したように、本実施形態によれば、定着金物３０の部材表面側にナット５０を締め付けることにより、定着金物３０の注入孔３３から部材内側の端部までの長さに比べて、定着金物３０の注入孔３３からナット５０の部材表面側の端部までの長さが大きくなる。 As described above, according to the present embodiment, the nut 50 is fastened to the member surface side of the fixing metal 30, thereby fixing the length of the fixing metal 30 from the injection hole 33 to the inner end of the member. The length from the injection hole 33 of the hardware 30 to the end of the nut 50 on the member surface side is increased.
また、グラウト６０を隙間３４、５４を通してナット５０内に充填できず、鉄筋４０の螺条４１の欠損部などの狭い隙間を通らなければ、ナット５０内の隙間５４に流れ込むことができないので、定着金物３０の部材内側よりも部材表面側へ溢れ出しにくくなっている。 In addition, the grout 60 cannot be filled into the nut 50 through the gaps 34 and 54, and cannot flow into the gap 54 in the nut 50 unless it passes through a narrow gap such as a defective portion of the thread 41 of the reinforcing bar 40. The metal 30 is less likely to overflow to the member surface side than the inside of the member.
このため、本実施形態のように、定着金物３０がＰＣ仕口部材１０内に埋設され、定着金物３０の一方からしかグラウト６０の溢れ出しを確認することができない状況であっても、定着金物３０内にグラウト６０が十分充填されたことを確認することができ、定着金物３０を鉄筋４０に強固に固定することできる。 For this reason, even in a situation where the fixing metal 30 is embedded in the PC fitting member 10 and the overflow of the grout 60 can be confirmed only from one side of the fixing metal 30 as in this embodiment, the fixing metal It is possible to confirm that the grout 60 is sufficiently filled in 30, and the fixing hardware 30 can be firmly fixed to the reinforcing bar 40.
なお、本実施形態では、定着金物３０のＰＣ仕口部材１０の表面側に当接させた状態で、ナット５０を締め付けることとしたが、必ずしも、ナット５０を締め付けなくてもよい。上記のように、ナット５０を定着金物３０のＰＣ仕口部材１０の表面側に当接するように設けておけば、定着金物３０の注入孔３３から部材内側の端部までの長さに比べて、注入孔３３からナット５０の部材表面側の端部までの長さが長くなるため、注入孔３３から充填されたグラウト６０は部材内側に比べて部材表面側に溢れ出しにくくなり、ナット５０の部材表面側からグラウト６０が溢れ出すのを視認することで、定着金物３０内に十分グラウト６０が充填されたことを確認できる。 In the present embodiment, the nut 50 is tightened in a state where the fixing hardware 30 is in contact with the surface side of the PC fitting 10, but the nut 50 is not necessarily tightened. As described above, if the nut 50 is provided so as to be in contact with the surface side of the PC fitting member 10 of the fixing metal 30, the length from the injection hole 33 of the fixing metal 30 to the inner end of the member is compared. Since the length from the injection hole 33 to the end of the nut 50 on the member surface side becomes longer, the grout 60 filled from the injection hole 33 is less likely to overflow to the member surface side compared to the inside of the member. By visually confirming that the grout 60 overflows from the member surface side, it can be confirmed that the grout 60 is sufficiently filled in the fixing metal 30.
また、本実施形態では、軸方向の略中央に注入孔３３が形成された定着金物３０を用いる場合について説明したが、これに限らず、例えば、図７に示すように、注入孔１３３が貫通孔１３０Ａの軸方孔何れかに偏って設けられた定着金物１３０を用いてもよい。この場合には、同図に示すように、注入孔１３３が形成された側がＰＣ仕口部材１０の内部側に位置するように定着金物１３０を埋設しておくことで、本実施形態のようにナット５０を取り付けなくても、注入孔１３３から定着金物１３０のＰＣ仕口部材１０の中心側までの長さに比べて、注入孔１３３から定着金物１３０のＰＣ仕口部材１０の表面側までの長さが長くなるため、上記の実施形態と同様に定着金物１３０の鉄筋４０の端部側からグラウト６０が溢れ出たのを視認できれば、定着金物１３０内にグラウト６０が充填されたことを確認できる。また、上記の実施形態の定着金物３０に代えて、このように一方に偏って注入孔１３３が形成された定着金物１３０を用いることも可能である。 Further, in the present embodiment, the case where the fixing hardware 30 in which the injection hole 33 is formed at substantially the center in the axial direction has been described. However, the present invention is not limited to this. For example, as shown in FIG. A fixing hardware 130 that is biased to any one of the axial holes of the hole 130A may be used. In this case, as shown in the figure, the fixing hardware 130 is embedded so that the side on which the injection hole 133 is formed is located on the inner side of the PC fitting member 10, as in this embodiment. Even if the nut 50 is not attached, the length from the injection hole 133 to the surface side of the PC fitting member 10 of the fixing metal 130 is longer than the length from the injection hole 133 to the center side of the PC fitting member 10 of the fixing metal 130. Since the length becomes longer, if the grout 60 overflows from the end side of the reinforcing bar 40 of the fixing metal 130 as in the above embodiment, it is confirmed that the grout 60 is filled in the fixing metal 130. it can. Further, instead of the fixing metal 30 of the above-described embodiment, it is also possible to use a fixing metal 130 in which the injection hole 133 is formed so as to be biased to one side.
また、本実施形態では、ＰＣ仕口部材１０内に先端が到達する鉄筋４０の先端に、部材内に埋設された定着金物３０を取り付ける場合について説明したが、これに限らず、コンクリート部材内に先端が到達するように鉄筋を配置し、その先端に定着金物を取り付ける場合であれば、本発明を適用することができる。 Moreover, although this embodiment demonstrated the case where the fixing metal fitting 30 embed | buried in the member was attached to the front-end | tip of the reinforcing bar 40 which a front-end | tip reaches in the PC joint member 10, it does not restrict to this but in a concrete member The present invention can be applied to the case where a reinforcing bar is arranged so that the tip reaches the end and a fixing hardware is attached to the tip.
また、本実施形態では、ＰＣ部材１０内に定着金物３０が埋設された場合に本発明を適用した場合について説明したが、これに限らず、定着金物が埋設されるコンクリートを現場で構築する際に、鉄筋が密集するなどの理由により、定着金物の一方からしかグラウトの溢れ出しを確認することができないような場合には、本発明を適用することで、定着金物内に充填材が十分充填されたことを確認することができ、定着金物と鉄筋とを確実に固定することができる。 In the present embodiment, the case where the present invention is applied to the case where the fixing hardware 30 is embedded in the PC member 10 is described. However, the present invention is not limited to this, and the concrete in which the fixing hardware is embedded is constructed on site. In addition, when the overflow of the grout can be confirmed only from one side of the fixing hardware due to the reason that the reinforcing bars are densely packed, the filling material is sufficiently filled in the fixing hardware by applying the present invention. It can be confirmed that the fixing hardware and the reinforcing bar are securely fixed.
また、本実施形態では、鍔部３２がＰＣ部材１０の表面側に位置するように定着金物３０を埋設するものとしたが、これに限らず、図８に示すように、定着金物を、鍔部２３２が部材中心側に位置するようにＰＣ部材１０に埋設してもよい。この場合、同図に示すように、定着金物２３０としては、注入孔２３３が鍔部２３２側に偏って設けられたものを用いるとよい。これにより、注入孔２３３から定着金物２３０のＰＣ仕口部材１０の中心側までの長さに比べて、注入孔２３３から定着金物２３０のＰＣ仕口部材１０の表面側までの長さが長くなり、内部に充填されたグラウトは、定着金物２３０の部材表面側に比べて、鉄筋４０の端部側に溢れ出にくくなる。また、図８に示す実施形態では、注入孔２３３が鍔部２３２に偏って設けられた定着金物２３０を用いることにより、グラウトが鉄筋４０の端部側から溢れ出にくくなるようにしたが、これに限らず、上記の実施形態と同様に、定着金物のＰＣ部材の表面側にナットを当接させる又は締め付けることにより、グラウトが鉄筋４０の端部側から溢れ出にくくなるようにしてもよい。 Further, in this embodiment, the fixing hardware 30 is embedded so that the collar portion 32 is positioned on the surface side of the PC member 10, but not limited to this, as shown in FIG. You may embed in the PC member 10 so that the part 232 may be located in the member center side. In this case, as shown in the figure, it is preferable to use a fixing metal 230 in which the injection hole 233 is provided so as to be biased toward the flange portion 232 side. Accordingly, the length from the injection hole 233 to the surface side of the PC fitting member 10 of the fixing metal 230 becomes longer than the length from the injection hole 233 to the center side of the PC fitting member 10 of the fixing metal 230. The grout filled inside is less likely to overflow to the end side of the reinforcing bar 40 compared to the member surface side of the fixing metal 230. Further, in the embodiment shown in FIG. 8, the grout is not easily overflowed from the end side of the reinforcing bar 40 by using the fixing metal 230 in which the injection hole 233 is provided to be biased to the flange portion 232. Not limited to this, the grout may not easily overflow from the end side of the reinforcing bar 40 by abutting or tightening a nut on the surface side of the PC member of the fixing metal as in the above embodiment.
また、上記の実施形態では、図１に示すような、鉄筋挿入孔２３が部材表面に開口するように埋設された機械式継手２２を備えるＰＣ梁部材２０と、仕口部のみを構成するＰＣ仕口部材とを接合する場合について説明したが、本発明が適用できるのはこれに限らない。例えば、図９に示すように、機械式継手３２２が部材内部に埋設されており、接合端面から機械式継手３２２の鉄筋挿入孔３２３まで到達するような貫通孔が形成されたＰＣ梁部材と、ＰＣ仕口部材１０とを接合する場合や、図１０に示すように、仕口部及び梁の端部を構成するＰＣ梁・仕口部材４１０と、梁の中央部を構成するＰＣ梁部材４２０とを接合する場合にも適用することができる。なお、図１０に示す実施形態では、機械式継手４２２の鉄筋挿入孔４２３が部材の端面に開口する場合を示しているが、図９と同様に機械式継手４２２は部材内部に埋設する構成としてもよい。 Moreover, in said embodiment, as shown in FIG. 1, PC beam member 20 provided with the mechanical coupling 22 embedded so that the reinforcing bar insertion hole 23 might open on the member surface, and PC which comprises only a joint part. Although the case where the joint member is joined has been described, the present invention is not limited to this. For example, as shown in FIG. 9, a mechanical joint 322 is embedded in the member, and a PC beam member in which a through hole is formed so as to reach the reinforcing bar insertion hole 323 of the mechanical joint 322 from the joint end surface; When the PC joint member 10 is joined, or as shown in FIG. 10, the PC beam / joint member 410 constituting the joint portion and the end of the beam, and the PC beam member 420 constituting the center portion of the beam. The present invention can also be applied in the case of joining together. In the embodiment shown in FIG. 10, the case where the reinforcing bar insertion hole 423 of the mechanical joint 422 opens at the end face of the member is shown, but the mechanical joint 422 is embedded in the member as in FIG. Also good.
１０、４１０ ＰＣ仕口部材
１１、４１１ 鉄筋挿入孔
２０、３２０、４２０ ＰＣ梁部材
２１、３２１、４２１ 梁主筋
２２、３２２、４２２ 機械式継手
２３、３２３、４２３ 鉄筋挿入孔
３２４ 貫通孔
３０、１３０、２３０ 定着金物
３０Ａ、１３０Ａ、２３０Ａ 貫通孔
３１、２３１ 螺条
３２、２３２ 鍔部
３３、１３３、２３３ 注入孔
３４ 隙間
４０ 鉄筋
４１ 螺条
５０ ナット
５１ 螺条
５４ 隙間
10, 410 PC joint member 11, 411 Reinforcing bar insertion hole 20, 320, 420 PC beam member 21, 321, 421 Beam main bar 22, 322, 422 Mechanical joint 23, 323, 423 Reinforcing bar insertion hole 324 Through hole 30, 130 , 230 Fixing hardware 30 </ b> A, 130 </ b> A, 230 </ b> A Through-holes 31, 231 Thread 32, 232 Gutter 33, 133, 233 Injection hole 34 Gap 40 Reinforcement 41 Thread 50 Nut 51 Thread 54 Gap
Claims (8)
前記定着金物を、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成しておき、
前記充填材が前記貫通孔の他端側から溢れ出るのを確認することを特徴とする定着金物の内部に充填された充填材の充填状態の確認方法。 A fixing metal having a through hole having a thread formed on the inner peripheral surface is screwed onto the outer periphery of a reinforcing bar having a thread on the outer peripheral surface, and a gap between the fixing metal and the reinforcing bar is introduced from an injection hole leading to the through hole. A method of confirming that the filler is filled in the gap when the fixing metal is fixed to the reinforcing bar by filling the filler with the filler,
The fixing metal is configured such that the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal,
A method of confirming a filling state of a filler filled in a fixing metal, wherein the filler is confirmed to overflow from the other end side of the through hole.
前記定着金物は、前記他端側が部材表面に露出するようにＰＣ部材に埋設されていることを特徴とする充填材の充填状態の確認方法。 A method for confirming the filling state of the filler according to claim 1,
The fixing metal is embedded in a PC member so that the other end is exposed on the surface of the member.
前記定着金物は、前記注入孔が前記定着金物の軸方向中央部よりも前記一端側に形成されていることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていることを特徴とする充填材の充填状態の確認方法。 A method for confirming a filling state of a filler according to claim 1 or 2,
In the fixing metal, the filling hole is formed on the one end side with respect to the axial center portion of the fixing metal, so that the filler filled in the gap is on the other end side rather than the one end side of the fixing metal. It is comprised so that it may become difficult to overflow from the inside, The confirmation method of the filling state of the filler characterized by the above-mentioned.
前記定着金物は、前記他端側に前記鉄筋と螺合するとともに、前記定着金物と当接するようにナットを取り付けることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていることを特徴とする充填材の充填状態の確認方法。 A method for confirming a filling state of a filler according to any one of claims 1 to 3,
The fixing metal is screwed to the reinforcing bar on the other end side, and a nut is attached so as to come into contact with the fixing metal, so that the filler filled in the gap is different from the one end side of the fixing metal. It is comprised so that it may become difficult to overflow from an end side, The confirmation method of the filling state of the filler characterized by the above-mentioned.
前記定着金物は、前記鉄筋にナットを螺合させ、前記ナットを前記他端側に締め付けることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていることを特徴とする充填材の充填状態の確認方法。 A method for confirming a filling state of a filler according to any one of claims 1 to 4,
In the fixing metal, a nut is screwed into the reinforcing bar, and the nut is tightened to the other end, so that the filler filled in the gap is less likely to overflow from the other end than the one end of the fixing metal. It is comprised so that it may become. The confirmation method of the filling state of the filler characterized by the above-mentioned.
前記定着金物を、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成しておき、
前記定着金物を前記鉄筋に螺合させ、
前記貫通孔の他端側から溢れ出るまで前記充填材を充填することを特徴とする鉄筋に定着金物を固定する方法。 A fixing metal having a through hole having a thread formed on the inner peripheral surface is screwed onto the outer periphery of a reinforcing bar having a thread on the outer peripheral surface, and a gap between the fixing metal and the reinforcing bar is introduced from an injection hole leading to the through hole. A method of fixing the fixing hardware to the reinforcing bar by filling the filler with a filler,
The fixing metal is configured such that the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal,
Screwing the fixing hardware to the reinforcing bar,
A method of fixing a fixing metal to a reinforcing bar, wherein the filler is filled until it overflows from the other end side of the through hole.
前記注入孔が前記定着金物の軸方向中央部よりも一端側に形成されていることにより、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されていることを特徴とする定着金物。 It has a through hole with a thread on the inner peripheral surface, is screwed onto the outer periphery of a reinforcing bar with a thread on the outer peripheral surface, and fills the gap between the fixing hardware and the reinforcing bar through the injection hole that leads to the through hole. A fixing hardware for fixing the reinforcing bar to a concrete member, which is used by being fixed to the end of the reinforcing bar by being filled with a material,
Since the injection hole is formed on one end side with respect to the central portion in the axial direction of the fixing metal, the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal. Fixing hardware characterized in that it is configured as follows.
前記定着金物は、前記隙間に充填された充填材が前記定着金物の一端側よりも他端側から溢れ出し難くなるように構成されており、前記他端側が部材表面に露出するように埋設されていることを特徴とするＰＣ部材。 It has a through hole with a thread on the inner peripheral surface, is screwed onto the outer periphery of a reinforcing bar with a thread on the outer peripheral surface, and fills the gap between the fixing hardware and the reinforcing bar through the injection hole that leads to the through hole. It is a PC member in which a fixing metal for fixing the reinforcing bar is embedded in the member, which is used by being fixed to the end of the reinforcing bar by being filled with a material,
The fixing metal is configured such that the filler filled in the gap is less likely to overflow from the other end side than the one end side of the fixing metal, and the other end side is embedded so as to be exposed on the surface of the member. A PC member characterized by the above.
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