JP7836717B2 - Joint structure - Google Patents
Joint structureInfo
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- JP7836717B2 JP7836717B2 JP2022093047A JP2022093047A JP7836717B2 JP 7836717 B2 JP7836717 B2 JP 7836717B2 JP 2022093047 A JP2022093047 A JP 2022093047A JP 2022093047 A JP2022093047 A JP 2022093047A JP 7836717 B2 JP7836717 B2 JP 7836717B2
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Description
本発明は、コンクリート部材同士の接合構造に関する。 This invention relates to a joining structure for concrete members.
建設工事では、工期短縮化を目的として、プレキャスト部材を使用する場合がある。プレキャスト部材は、現場打ちコンクリートにより形成された他のコンクリート部材や、他のプレキャスト部材と、モルタル等を介して接合するのが一般的である。
例えば、図５に示すように、プレキャスト製のフーチング部材１２０と、コンクリート杭との接合構造１００として、フーチング部材１２０の底面に凹部１２１を形成しておき、この凹部１２１に杭頭部（凸部１３１）を挿入した状態で、フーチング部材１２０の凹部１２１と杭頭部と１３１の隙間にモルタルなどの充填材１４０を充填する場合がある（例えば、特許文献１参照）。
このような接合構造１００では、凹部１２１への充填材１４０の充填状況を目視で確認することができないため、凹部１２１の中央付近に形成された注入孔１２２から充填材１４０の注入を行い、凹部１２１の縁部（角部）近傍に形成された複数の空気孔１２３から充填材１４０の排出を確認することで、充填が完了したものとするのが一般的であった。
なお、凹部１２１の中央付近に形成された注入孔１２２から注入された充填材１４０は、図６（ａ）に示すように、凸部１３１の上面において同心円状に広がり、図６（ｂ）に示すように凸部１３１の縁に到達して凸部１３１の縁から流下する。凸部１３１の縁から流下した充填材１４０は、図６（ｃ）に示すように、凹部１２１の内壁面と凸部１３１の側面との間を流れる。凸部１３１が矩形状の場合に充填材１４０は、凸部１３１の四辺に到達して流下し、凹部１２１の内壁面と凸部１３１の側面との間を流れて空気孔１２３に到達する。そのため、充填材１４０は、凸部１３１の上面全体に広がってから流下するとは限らず、凹部１２１の縁部に形成された空気孔１２３から充填材１４０の排出が確認された場合であっても、空気孔１２３の中央寄りの部分（領域１３３）において未充填箇所（空気だまり）が生じるおそれがあり、凸部１３１と凹部１２１との隙間への充填材１４０の充填完了を簡易に判断する方法がない。
In construction projects, precast members are sometimes used to shorten the construction period. Precast members are typically joined to other concrete members formed by cast-in-place concrete, or to other precast members, via mortar or similar materials.
For example, as shown in Figure 5, in a joint structure 100 between a precast footing member 120 and a concrete pile, a recess 121 is formed on the bottom surface of the footing member 120, and with the pile head (protrusion 131) inserted into this recess 121, a filler material 140 such as mortar is filled into the gap between the recess 121 of the footing member 120 and the pile head 131 (see, for example, Patent Document 1).
In such a joint structure 100, it is not possible to visually confirm the status of filling the recess 121 with the filler material 140. Therefore, it was common practice to inject the filler material 140 through an injection hole 122 formed near the center of the recess 121 and to confirm the discharge of the filler material 140 through a plurality of air holes 123 formed near the edge (corner) of the recess 121, thereby indicating that filling was complete.
The filler material 140 injected through the injection hole 122 formed near the center of the recess 121 spreads concentrically on the upper surface of the protrusion 131, as shown in Figure 6(a), reaches the edge of the protrusion 131, and flows down from the edge of the protrusion 131, as shown in Figure 6(b). The filler material 140 that has flowed down from the edge of the protrusion 131 flows between the inner wall surface of the recess 121 and the side surface of the protrusion 131, as shown in Figure 6(c). If the protrusion 131 is rectangular, the filler material 140 reaches all four sides of the protrusion 131 and flows down, flowing between the inner wall surface of the recess 121 and the side surface of the protrusion 131 to reach the air hole 123. Therefore, the filler material 140 does not necessarily spread across the entire upper surface of the protrusion 131 before flowing down. Even if discharge of the filler material 140 from the air holes 123 formed on the edge of the recess 121 is confirmed, there is a risk that unfilled areas (air pockets) may occur in the central part (region 133) of the air holes 123, and there is no easy way to determine when the filler material 140 has been completely filled into the gap between the protrusion 131 and the recess 121.
このような観点から、本発明は、上側のコンクリート部材の下面に形成された凹部に、下側のコンクリート部材の上端に形成された凸部を挿入した状態で、凹部に充填材を充填することによりコンクリート部材同士を接合する接合部において、より確実に充填材を充填することを可能とした接合構造を提案することを課題とする。 From this perspective, the present invention aims to propose a joint structure that enables more reliable filling of a filler material in a joint between concrete members, where a protrusion formed on the upper end of a lower concrete member is inserted into a recess formed on the lower surface of an upper concrete member, and a filler material is then filled into the recess.
前記課題を解決するために、本発明は、上側に配設された上側コンクリート部材と下側に配設された下側コンクリート部材とを接合する接合構造であって、前記上側コンクリート部材の下面に形成された平面視正方形状の凹部と、前記上側コンクリート部材の側面または上面から前記凹部の中央部に至る１本の注入孔と、前記上側コンクリート部材の側面または上面から前記凹部に至る複数の空気孔と、前記下側コンクリート部材の上部に形成された前記凹部に挿入される平面視正方形状の凸部と、前記注入孔から前記凹部と前記凸部との隙間に充填される充填材とを備えている。前記空気孔は、前記凸部の周縁の内側で、かつ、前記凸部の周縁に内接する円の外側の領域の直上において開口している。
なお、前記凸部の平面視正方形の頂点を点Ｐとし、前記凸部の中心Ｏと前記点Ｐとを結ぶ直線と前記凸部の周縁に内接する円との交点を点Ａとしたとき、前記空気孔は、前記点Ｐと前記点Ａとを結ぶ直線を対角線とする矩形の領域内に設けられているのが望ましく、前記点Ｐと前記点Ａとの中間点である点Ｂの近傍に設けられているのがより望ましい。
To solve the aforementioned problems, the present invention provides a joining structure for joining an upper concrete member disposed on the upper side and a lower concrete member disposed on the lower side, comprising: a square-shaped recess in plan view formed on the lower surface of the upper concrete member; a single injection hole extending from the side or top surface of the upper concrete member to the center of the recess; a plurality of air holes extending from the side or top surface of the upper concrete member to the recess; a square-shaped protrusion in plan view formed on the upper part of the lower concrete member and inserted into the recess; and a filler material that fills the gap between the recess and the protrusion from the injection hole. The air holes open on the inside of the periphery of the protrusion and directly above the region outside the circle inscribed in the periphery of the protrusion.
Furthermore, when point P is the vertex of the square in plan view of the protrusion, and point A is the intersection of the line connecting the center O of the protrusion and point P with the circle inscribed on the periphery of the protrusion, it is desirable that the air vent be located within a rectangular area whose diagonal is the line connecting point P and point A, and more preferably located near point B, which is the midpoint between point P and point A.
かかる接合構造を構築する際は、凹部の中央付近から注入した充填材が、凸部の上面において同心円状に広がり、凸部の各辺から流下して、凹部の内壁面に至った後、凹部の内壁面と凸部の側面との間を流れる。空気孔は、凸部の平面視正方形の頂点よりも中心側であって、同心円状に広がる充填材の外側の領域に形成されているため、未充填箇所が形成され難い。すなわち、充填材が回り込み難い位置に空気孔を形成しておき、当該空気孔からの充填材の流出を確認することで、未充填箇所（空気だまり）が形成されることを防止できる。 When constructing such a joint structure, the filler injected from near the center of the recess spreads concentrically on the upper surface of the protrusion, flows down from each side of the protrusion, reaches the inner wall surface of the recess, and then flows between the inner wall surface of the recess and the side surface of the protrusion. Since the air vents are formed on the side of the vertices of the square-shaped protrusion in plan view, and in the area outside the concentrically spreading filler, it is difficult for unfilled areas to form. In other words, by forming air vents in a position where the filler is unlikely to wrap around, and by confirming the outflow of the filler from these air vents, it is possible to prevent the formation of unfilled areas (air pockets).
本発明の接合構造によれば、上側のコンクリート部材の下面に形成された凹部に、下側のコンクリート部材の上端に形成された凸部を挿入した状態で、凹部に充填材を充填することによりコンクリート部材同士を接合する接合部において、より確実に充填材を充填することが可能となる。 According to the joint structure of the present invention, in a joint where concrete members are joined by inserting a protrusion formed on the upper end of a lower concrete member into a recess formed on the lower surface of an upper concrete member, and then filling the recess with a filler material, it becomes possible to more reliably fill the filler material.
本実施形態では、杭基礎構造において、杭（下側コンクリート部材）３の杭頭部３１とプレキャスト製のフーチング（上側コンクリート部材）２とを接合する場合について説明する。図１にフーチング２と杭３との接合構造１を示す。本実施形態では、杭３の杭頭部３１およびキャップ部材３２が、フーチング２の凹部２１に挿入される凸部を構成する場合について説明する。
図１（ａ）および（ｂ）に示すように、フーチング２の下面には、平面視正方形状の凹部２１が形成されている。また、フーチング２には、注入孔２２および複数の空気孔２３が形成されている。注入孔２２は、フーチング２の側面から凹部２１に至るように形成されている。また、空気孔２３は、フーチング２の側面から凹部２１に至るように形成されている。
杭３の上端（凸部）は、凹部２１に挿入可能で、かつ、平面視正方形状を呈している。杭頭部３１は、フーチング２が載置される床付け面５から突出している。本実施形態の杭頭部３１は、杭頭処理として、凹部２１に挿入可能な平面視正方形状のキャップ部材３２が形成されている。
接合構造１は、凹部２１に杭頭部３１（キャップ部材３２）を挿入した状態で、凹部２１と杭頭部３１（キャップ部材３２）との隙間に注入孔２２から注入した充填材４を充填してなる。充填材４には、流動性を有し、かつ、硬化後に所定の強度を発現する隙間を塞ぐのに適した材料を使用すればよく、例えば無収縮モルタルを使用すればよい。
In this embodiment, we will describe a case in which the pile head 31 of the pile (lower concrete member) 3 and the precast footing (upper concrete member) 2 are joined in a pile foundation structure. Figure 1 shows the joining structure 1 between the footing 2 and the pile 3. In this embodiment, we will describe a case in which the pile head 31 and the cap member 32 of the pile 3 constitute a protrusion that is inserted into the recess 21 of the footing 2.
As shown in Figures 1(a) and (b), a square-shaped recess 21 is formed on the lower surface of the footing 2 in plan view. The footing 2 also has an injection hole 22 and a number of air holes 23. The injection hole 22 is formed to extend from the side surface of the footing 2 to the recess 21. The air holes 23 are also formed to extend from the side surface of the footing 2 to the recess 21.
The upper end (protrusion) of the pile 3 is insertable into the recess 21 and has a square shape in plan view. The pile head 31 protrudes from the floor surface 5 on which the footing 2 is placed. In this embodiment, the pile head 31 has a square-shaped cap member 32 in plan view that can be inserted into the recess 21 as a pile head treatment.
The joint structure 1 is formed by inserting the pile head 31 (cap member 32) into the recess 21 and filling the gap between the recess 21 and the pile head 31 (cap member 32) with a filler material 4 injected through the injection hole 22. The filler material 4 can be any material that is fluid and suitable for sealing gaps and exhibits a predetermined strength after hardening; for example, non-shrink mortar can be used.
本実施形態の注入孔２２は、凹部２１の中心付近に形成されている。
図２に空気孔２３の形成箇所を示す。図２に示すように、空気孔２３は、キャップ部材３２（杭頭部３１）の周縁の内側で、かつ、キャップ部材３２の周縁に内接する円Ｃの外側の領域３３の直上において開口している。
キャップ部材３２（杭頭部３１）の頂点（角）を点Ｐとし、キャップ部材３２の中心Ｏと点Ｐとを結ぶ直線Ｌと杭頭部３１の周縁に内接する円Ｃとの交点を点Ａ（図２では紙面右上の交点）としたとき、点Ｐと点Ａとの中間点である点Ｂの近傍に空気孔２３が設けられている。本実施形態では、点Ｐと点Ａとを結ぶ直線を対角線とする矩形Ｅの領域内、より具体的には、点Ｐと点Ａとの中点（矩形Ｅの中心）に点Ｂを設けている。このとき、点Ｐの座標を（０，０）、キャップ部材３２の１辺の長さをＤとすると、点Ａの座標は（Ｄ（２－２０．５）／４，Ｄ（２－２０．５）／４）、点Ｂの座標は（Ｄ（２－２０．５）／８，Ｄ（２－２０．５）／８）となる。
In this embodiment, the injection hole 22 is formed near the center of the recess 21.
Figure 2 shows the location where the air holes 23 are formed. As shown in Figure 2, the air holes 23 are located on the inside of the periphery of the cap member 32 (pile head 31) and open directly above the region 33 outside the circle C that is inscribed in the periphery of the cap member 32.
Let P be the vertex (corner) of the cap member 32 (pile head 31), and let A be the intersection of the line L connecting the center O of the cap member 32 and point P and the circle C inscribed on the periphery of the pile head 31 (the intersection point in the upper right of the paper in Figure 2). An air hole 23 is provided near point B, which is the midpoint between point P and point A. In this embodiment, point B is provided within the region of a rectangle E with the line connecting point P and point A as its diagonal, more specifically, at the midpoint of point P and point A (the center of rectangle E). In this case, if the coordinates of point P are (0,0) and the length of one side of the cap member 32 is D, then the coordinates of point A are (D(2 - 2 0.5 )/4, D(2 - 2 0.5 )/4) and the coordinates of point B are (D(2 - 2 0.5 )/8, D(2 - 2 0.5 )/8).
以下、本実施形態の接合構造１を利用した杭基礎構造の構築方法について説明する。
本実施形態の杭基礎構造の構築方法は、杭構築工程と、杭頭処理工程と、基礎配設工程と、接合工程とを有している。図３に杭基礎構造の構築方法の作業状況を示す。
杭構築工程は、図３（ａ）に示すように、杭３を構築する工程である。本実施形態では、円柱状のプレキャスト部材を地盤Ｇに圧入することにより杭３を構築するが、杭３の種類や施工方法は限定されるものではない。杭３の圧入は、図示しない回転圧入装置を用いて行う。
杭３の施工が完了したら、杭頭部３１の周囲の地盤面ＧＬを掘り下げて、杭頭部３１を露出させるとともに、地盤面ＧＬ（床付け面）の不陸を整正する。なお、杭３の施工を杭頭部３１が露出した位置で止める場合は、地盤面ＧＬを掘り下げる必要はない。
The following describes a method for constructing a pile foundation structure using the joint structure 1 of this embodiment.
The method for constructing a pile foundation structure according to this embodiment includes a pile construction step, a pile head treatment step, a foundation placement step, and a joining step. Figure 3 shows the work process for constructing a pile foundation structure.
The pile construction process is the process of constructing the pile 3, as shown in Figure 3(a). In this embodiment, the pile 3 is constructed by pressing a cylindrical precast member into the ground G, but the type of pile 3 and the construction method are not limited. The pile 3 is pressed in using a rotary press-in device (not shown).
Once the construction of pile 3 is complete, the ground surface GL around the pile head 31 is excavated to expose the pile head 31, and any unevenness in the ground surface GL (base surface) is leveled. However, if the construction of pile 3 is stopped at the point where the pile head 31 is exposed, it is not necessary to excavate the ground surface GL.
杭頭処理工程は、図３（ｂ）に示すように、杭３の杭頭部３１にキャップ部材３２を形成する工程である。キャップ部材３２は、杭頭部３１がキャップ部材３２の下面に密着するように覆い被せた状態で形成する。キャップ部材３２は、凹部２１に挿入可能な大きさの平面視矩形状のブロック状部材であって、底面に杭頭部３１を挿入可能な円錐台状窪みが形成されている。杭頭部３１にキャップ部材３２を形成したら、キャップ部材３２の下端部の周囲に地盤材料（砕石や土砂等）５１を敷き均し、キャップ部材３２の下端縁と地盤面Ｇ０との隙間を閉塞するとともに、キャップ部材３２を仮固定する。キャップ部材３２を借り固定したら、必要に応じて均しコンクリート５２を打設する。 The pile head treatment process, as shown in Figure 3(b), involves forming a cap member 32 on the pile head 31 of the pile 3. The cap member 32 is formed so that it covers the pile head 31, ensuring close contact with the lower surface of the cap member 32. The cap member 32 is a rectangular block-shaped member in plan view, sized to fit into the recess 21, with a frustoconical recess formed on its bottom surface into which the pile head 31 can be inserted. After forming the cap member 32 on the pile head 31, ground material (crushed stone, soil, etc.) 51 is spread around the lower end of the cap member 32 to close the gap between the lower edge of the cap member 32 and the ground surface G0, and to temporarily fix the cap member 32. Once the cap member 32 is temporarily fixed, leveling concrete 52 is poured as needed.
基礎配設工程は、図３（ｃ）に示すように、プレキャストコンクリート部材からなるフーチング２を配設する工程である。フーチング２は、凹部２１でキャップ部材３２（杭頭部３１）を覆うように、杭頭部３１の上方から配設する。 The foundation installation process, as shown in Figure 3(c), involves installing the footing 2, which is made of precast concrete members. The footing 2 is installed from above the pile head 31, with the recess 21 covering the cap member 32 (pile head 31).
接合工程は、杭頭部３１とフーチング２とを接合する工程である。杭頭部３１とフーチング２との接合は、図３（ｃ）に示すように、注入孔２２から充填材４を注入し、凹部２１とキャップ部材３２（杭頭部３１）との隙間に充填材４を充填することにより行う。充填材４の注入に伴い、凹部２１とキャップ部材３２との隙間の空気が、空気孔２３から排気される。凹部２１とキャップ部材３２との隙間が充填材４により充填されると空気孔２３から充填材４が排出される。すべての空気孔２３から充填材４の排出が確認されたら、凹部２１に充填材４が充填されたとして、充填材４の注入を終了する。
なお、注入孔２２から注入された充填材４は、図４（ａ）に示すように、杭３（キャップ部材３２）の上面において同心円状に広がった後、図４（ｂ）に示すように、キャップ部材３２の縁（辺）に到達する。充填材４は、キャップ部材３２の縁に到達すると、キャプ部材の縁（四辺）からキャップ部材３２の側面と凹部２１の内壁面との隙間（溝Ｔ）に流下する。そして、当該隙間（溝Ｔ）に流下した充填材４は、図４（ｃ）に示すように、凹部２１の内壁面とキャップ部材３２の側面との隙間（溝Ｔ）を流れる。凹部２１の内壁面とキャップ部材３２の側面との隙間（溝Ｔ）に充填材４が充填されると、隙間（溝Ｔ）からあふれた充填材４がキャップ部材３２（杭頭部３１）の上面周縁の内側で、かつ、キャップ部材３２（杭頭部３１）の周縁に内接する円Ｃ（図２参照）の外側の領域３３に流れ込み、凹部２１の内部が充填材４により充填される（図１参照）。
The joining process involves joining the pile head 31 to the footing 2. As shown in Figure 3(c), the joining of the pile head 31 to the footing 2 is performed by injecting the filler material 4 through the injection hole 22 and filling the gap between the recess 21 and the cap member 32 (pile head 31) with the filler material 4. As the filler material 4 is injected, the air in the gap between the recess 21 and the cap member 32 is exhausted through the air hole 23. Once the gap between the recess 21 and the cap member 32 is filled with the filler material 4, the filler material 4 is discharged from the air hole 23. Once it is confirmed that the filler material 4 has been discharged from all the air holes 23, it is considered that the recess 21 has been filled with the filler material 4, and the injection of the filler material 4 is terminated.
As shown in Figure 4(a), the filler material 4 injected from the injection hole 22 spreads concentrically on the upper surface of the pile 3 (cap member 32), and then reaches the edge (side) of the cap member 32, as shown in Figure 4(b). When the filler material 4 reaches the edge of the cap member 32, it flows down from the edge (four sides) of the cap member into the gap (groove T) between the side surface of the cap member 32 and the inner wall surface of the recess 21. The filler material 4 that has flowed down into the gap (groove T) then flows through the gap (groove T) between the inner wall surface of the recess 21 and the side surface of the cap member 32, as shown in Figure 4(c). When the filler material 4 is filled into the gap (groove T) between the inner wall surface of the recess 21 and the side surface of the cap member 32, the filler material 4 that overflows from the gap (groove T) flows into the area 33 on the inside of the upper peripheral edge of the cap member 32 (pile head 31) and outside the circle C (see Figure 2) that is inscribed in the peripheral edge of the cap member 32 (pile head 31), and the inside of the recess 21 is filled with the filler material 4 (see Figure 1).
本実施形態の接合構造１は、空気孔２３が、杭頭部（凸部）３１の頂点（角）よりも中心側であって、同心円状に広がる充填材４の外側の領域に形成されているため、未充填箇所が形成され難い。すなわち、充填材４が回り込み難い位置に空気孔２３が形成されているため、当該空気孔２３からの充填材４の流出を確認することで、未充填箇所（空気だまり）が形成されることを防止できる。 In this embodiment, the joint structure 1 has air holes 23 located closer to the center than the apex (corner) of the pile head (protrusion) 31, and formed in the outer region of the concentrically spreading filler material 4. Therefore, it is difficult for unfilled areas to form. In other words, because the air holes 23 are formed in a position where the filler material 4 is unlikely to wrap around, the outflow of the filler material 4 from the air holes 23 can be monitored to prevent the formation of unfilled areas (air pockets).
本発明は、前述の実施形態に限られず、前記の各構成要素については、本発明の趣旨を逸脱しない範囲で、適宜変更が可能である。
例えば、前記実施形態では、フーチング２と杭３とを接合する場合について説明したが、本発明の接合構造１の施工対象物は杭基礎構造に限定されるものではなく、他のコンクリート部材同士の接合構造にも適用可能である。例えば、プレキャスト部材を利用した柱の施工における、プレキャスト製の柱部材同士の接合に使用してもよい。
また、前記実施形態では、注入孔２２および空気孔２３をフーチング２の側面から凹部２１に至るように形成したが、注入孔２２および空気孔２３は、フーチング２の上面から凹部２１に至るように形成されていてもよい。
また、空気孔２３の形成箇所は、杭頭部３１の周縁の内側で、かつ、杭頭部３１の周縁に内接する円の外側の領域の直上において開口していれば限定されるものではない。なお、点Ｐと点Ａとを結ぶ直線を対角線とする矩形の領域内に空気孔２３を設けるのが望ましい。
上部コンクリートの凹部２１に挿入される下部コンクリート部材の凸部は、キャップ部材に限定されるものではなく、下部コンクリート部材の上面に形成された突起であってもよい。
キャップ部材３２は、必要に応じて設ければよい。また、キャップ部材３２の下面には、必ずしも円錐台状の窪みが形成されている必要はなく、例えば、柱状の窪みであってもよい。
The present invention is not limited to the embodiments described above, and each of the above-described components can be modified as appropriate without departing from the spirit of the present invention.
For example, although the above embodiment described the case of joining a footing 2 and a pile 3, the object to which the joint structure 1 of the present invention can be constructed is not limited to pile foundation structures, but can also be applied to joint structures between other concrete members. For example, it may be used to join precast column members in the construction of columns using precast members.
Furthermore, in the above embodiment, the injection holes 22 and air holes 23 were formed so as to extend from the side surface of the footing 2 to the recess 21, but the injection holes 22 and air holes 23 may also be formed so as to extend from the top surface of the footing 2 to the recess 21.
Furthermore, the location of the air vents 23 is not limited to being on the inside of the periphery of the pile head 31 and opening directly above the region outside the circle inscribed in the periphery of the pile head 31. It is preferable to provide the air vents 23 within a rectangular region with the line connecting point P and point A as its diagonal.
The protrusion of the lower concrete member that is inserted into the recess 21 of the upper concrete is not limited to a cap member, but may also be a projection formed on the upper surface of the lower concrete member.
The cap member 32 may be provided as needed. Furthermore, the lower surface of the cap member 32 does not necessarily need to have a frustoconical recess; for example, a columnar recess may be formed.
１ 接合構造
２ フーチング（上部コンクリート部材）
２１ 凹部
２２ 注入孔
２３ 空気孔
３ 杭（下部コンクリート部材）
３１ 杭頭部（凸部）
３２ キャップ部材（凸部）
３３ 領域
４ 充填材
５ 床付け面
Ｃ 円
Ｅ 矩形
Ｇ 地盤
ＧＬ 地盤面
Ｌ 直線
Ｔ 溝（隙間）
1. Joint structure 2. Footing (upper concrete member)
21 Recess 22 Injection hole 23 Air hole 3 Pile (lower concrete member)
31. Pile head (protruding part)
32 Cap member (protruding part)
33 Area 4 Filling material 5 Floor surface C Circle E Rectangle G Ground GL Ground surface L Straight line T Groove (gap)
Claims (3)
前記上側コンクリート部材の下面に形成された平面視正方形状の凹部と、
前記上側コンクリート部材の側面または上面から前記凹部の中央部に至る１本の注入孔と、
前記上側コンクリート部材の側面または上面から前記凹部に至る複数の空気孔と、
前記下側コンクリート部材の上部に形成された前記凹部に挿入される平面視正方形状の凸部と、
前記注入孔から前記凹部と前記凸部との隙間に充填される充填材と、を備え、
前記空気孔は、前記凸部の周縁の内側で、かつ、前記凸部の周縁に内接する円の外側の領域の直上において開口していることを特徴とする、接合構造。 A joining structure that connects an upper concrete member located on the upper side and a lower concrete member located on the lower side,
A square-shaped recess in plan view is formed on the lower surface of the upper concrete member,
A single injection hole extending from the side or top surface of the upper concrete member to the center of the recess,
Multiple air holes extending from the side or top surface of the upper concrete member to the recess,
A square-shaped protrusion in plan view is inserted into the recess formed on the upper part of the lower concrete member,
The system comprises a filler material that is filled into the gap between the recess and the protrusion through the injection hole,
The joint structure is characterized in that the air vent is located inside the periphery of the protrusion and is open directly above the region outside the circle inscribed in the periphery of the protrusion.
前記空気孔は、前記点Ｐと前記点Ａとを結ぶ直線を対角線とする矩形の領域内に設けられていることを特徴とする、請求項１に記載の接合構造。 Let P be the vertex of the square in plan view of the convex portion, and let A be the intersection of the line connecting the center O of the convex portion and point P, and the circle inscribed on the periphery of the convex portion.
The joining structure according to claim 1, characterized in that the air vent is provided within a rectangular region whose diagonal is the straight line connecting point P and point A.
前記上側コンクリート部材の下面に形成された平面視正方形状の凹部と、
前記上側コンクリート部材の側面または上面から前記凹部の中央部に至る注入孔と、
前記上側コンクリート部材の側面または上面から前記凹部に至る複数の空気孔と、
前記下側コンクリート部材の上部に形成された前記凹部に挿入される平面視正方形状の凸部と、
前記注入孔から前記凹部と前記凸部との隙間に充填される充填材と、を備え、
前記空気孔は、前記凸部の周縁の内側で、かつ、前記凸部の周縁に内接する円の外側の領域の直上において開口していて、
前記凸部の平面視正方形の頂点を点Ｐとし、前記凸部の中心Ｏと前記点Ｐとを結ぶ直線と前記凸部の周縁に内接する円との交点を点Ａとしたとき、前記空気孔は、前記点Ｐと前記点Ａとを結ぶ直線を対角線とする矩形の領域内であって、前記点Ｐと前記点Ａとの中間点である点Ｂの近傍に設けられていることを特徴とする、接合構造。 A joining structure that connects an upper concrete member located on the upper side and a lower concrete member located on the lower side,
A square-shaped recess in plan view is formed on the lower surface of the upper concrete member,
An injection hole extending from the side or top surface of the upper concrete member to the center of the recess,
Multiple air holes extending from the side or top surface of the upper concrete member to the recess,
A square-shaped protrusion in plan view is inserted into the recess formed on the upper part of the lower concrete member,
The system comprises a filler material that is filled into the gap between the recess and the protrusion through the injection hole,
The air vent is located on the inner side of the periphery of the protrusion and directly above the region outside the circle inscribed within the periphery of the protrusion.
A joining structure characterized in that, when point P is the vertex of the square in plan view of the protrusion, and point A is the intersection of the line connecting the center O of the protrusion and point P with a circle inscribed on the periphery of the protrusion, the air hole is provided within a rectangular region with the line connecting point P and point A as its diagonal, and is located near point B, which is the midpoint between point P and point A.
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| JP2000355975A (en) | 1999-06-17 | 2000-12-26 | Ando Corp | Precast composite column joining method |
| JP2005256546A (en) | 2004-03-15 | 2005-09-22 | Fujita Corp | Building basic structure and construction method |
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