JP2013256848A - Concrete structure - Google Patents

Concrete structure Download PDF

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JP2013256848A
JP2013256848A JP2012134956A JP2012134956A JP2013256848A JP 2013256848 A JP2013256848 A JP 2013256848A JP 2012134956 A JP2012134956 A JP 2012134956A JP 2012134956 A JP2012134956 A JP 2012134956A JP 2013256848 A JP2013256848 A JP 2013256848A
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reinforcing bar
main
concrete
steel pipe
pipe pile
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JP6115031B2 (en
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Koichi Tanaka
浩一 田中
Katsuya Hamachi
克也 浜地
Kenichi Sanjo
健一 三城
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Obayashi Corp
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Obayashi Corp
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Abstract

PROBLEM TO BE SOLVED: To form a concrete structure where a main reinforcing bar is divided with an inclusion like a pile head as a boundary, in a manner to enable transfer of force of the divided main reinforcing bar, and reduce welding work in constructing the concrete structure.SOLUTION: An RC beam 10 where a main reinforcing bar 14 is divided with a steel pipe pile 1 as a boundary, includes a pair of first reinforcing bars 20 which are arranged to sandwich the steel pipe pile 1 therebetween, and whose ends are disposed at positions further away from the steel pipe pile 1 than ends of the main reinforcing bar 14 and fixed to concrete, and a second reinforcing bar 22 which is arranged to be orthogonal to the main reinforcing bar 14 at a position between end of the main reinforcing bar 14 and end of the first reinforcing bar 20 in a plan view and whose both ends are fixed to concrete .

Description

本発明は、コンクリート構造体に関する。   The present invention relates to a concrete structure.

桟橋構造のように鋼管杭の頭部がＲＣ梁等のコンクリート構造体に接合される場合、杭頭部とコンクリート構造体との接合部では、杭頭部の外周部に定着プレートを溶接し、該定着プレートに機械式継手を溶接し、該機械式継手にコンクリート構造体の主鉄筋を結合している（例えば、特許文献１参照）。これにより、杭頭部を境に分断された主鉄筋の力の伝達を可能にしている。   When the head of a steel pipe pile is joined to a concrete structure such as an RC beam as in a pier structure, a fixing plate is welded to the outer periphery of the pile head at the joint between the pile head and the concrete structure, A mechanical joint is welded to the fixing plate, and a main reinforcing bar of a concrete structure is joined to the mechanical joint (see, for example, Patent Document 1). Thereby, transmission of the force of the main rebar divided by the pile head is made possible.

特開２００７―２４９２号公報JP 2007-2492 A

特許文献１に記載の杭頭部とコンクリート構造体との接合部を施工する際には、定着プレートを鋼管杭の外周部に突合せて溶接する作業や、機械式継手を定着プレートに溶接する作業等の多くの溶接作業が発生するが、多大な時間を要する等の理由から、溶接作業を減らすことが要望されている。   When constructing the joint between the pile head and the concrete structure described in Patent Document 1, the work of welding the fixing plate to the outer periphery of the steel pipe pile or the work of welding the mechanical joint to the fixing plate However, there is a demand for reducing the welding work because it takes a lot of time.

本発明は、上記事情に鑑みてなされたものであり、主鉄筋が杭頭部等の介在物を境に分断されたコンクリート構造体を、分断された主鉄筋の力の伝達が可能であるように構成すると共に、該コンクリート構造体を施工する際の溶接作業を減らすことを課題とするものである。   This invention is made | formed in view of the said situation, and it seems that the transmission of the force of the divided main rebar is possible for the concrete structure which the main rebar divided on the boundary of the inclusions, such as a pile head. And reducing the welding work when constructing the concrete structure.

上記課題を解決するために、本発明に係るコンクリート構造体は、主鉄筋が介在物を境に分断されたコンクリート構造体であって、前記介在物を挟むように対で配された引張補強部材であり、その端部が前記主鉄筋の端部よりも前記介在物から離れた位置に配されてコンクリートに定着された第一の引張補強部材と、平面視において、前記主鉄筋の端部と前記第一の引張補強部材の端部との間の位置で前記主鉄筋に対して交差するように配された引張補強部材であり、その両端部がコンクリートに定着された第二の引張補強部材と、を備える。   In order to solve the above-described problems, a concrete structure according to the present invention is a concrete structure in which main reinforcing bars are divided with inclusions as a boundary, and tensile reinforcement members arranged in pairs so as to sandwich the inclusions. A first tensile reinforcement member whose end is disposed at a position farther from the inclusion than the end of the main reinforcing bar and fixed to the concrete, and in plan view, the end of the main reinforcing bar, It is a tension reinforcement member arranged so as to intersect the main reinforcing bar at a position between the ends of the first tension reinforcement member, and a second tension reinforcement member whose both ends are fixed to concrete. And comprising.

また、前記コンクリート構造体は、立面視において、前記主鉄筋の端部と前記第一の引張補強部材の端部との間の位置で前記主鉄筋に対して交差するように配された引張補強部材であり、その両端部がコンクリートに定着された第三の引張補強部材を備えてもよい。   In addition, the concrete structure is a tensile member arranged so as to intersect the main reinforcing bar at a position between the end of the main reinforcing bar and the end of the first tensile reinforcing member in an elevational view. It is a reinforcement member, You may provide the 3rd tension reinforcement member by which the both ends were fixed to concrete.

また、前記コンクリート構造体において、前記第一、第二、第三の引張補強部材は、鉄筋、ＰＣ鋼材、又はＦＲＰ製部材であってもよい。   In the concrete structure, the first, second, and third tensile reinforcing members may be reinforcing bars, PC steel, or FRP members.

また、前記コンクリート構造体において、前記介在物は杭であってもよい。   In the concrete structure, the inclusion may be a pile.

本発明によれば、主鉄筋が杭頭部等の介在物を境に分断されたコンクリート構造体を、分断された主鉄筋の力の伝達が可能であるように構成すると共に、該コンクリート構造体を施工する際の溶接作業を減らすことができる。   According to the present invention, a concrete structure in which a main reinforcing bar is divided at the boundary of an inclusion such as a pile head is configured so as to be able to transmit the force of the divided main reinforcing bar, and the concrete structure. The welding work when constructing can be reduced.

一実施形態に係るＲＣ梁を示す平断面図（図２の１−１断面図）である。It is a plane sectional view (1-1 sectional view of Drawing 2) showing RC beam concerning one embodiment. 図１における２−２断面図である。It is 2-2 sectional drawing in FIG. （Ａ）、（Ｂ）は、本実施形態に係るＲＣ梁の梁幅方向の作用を説明するための平断面図である。(A), (B) is a plane sectional view for explaining an operation of the beam width direction of RC beam concerning this embodiment. 本実施形態に係るＲＣ梁の梁せい方向の作用を示す立断面図である。It is an elevation sectional view showing an operation of the beam direction of RC beam concerning this embodiment. 他の実施形態に係るＲＣ構造体を示す平断面図である。It is a plane sectional view showing the RC structure concerning other embodiments. 他の実施形態に係るＲＣ梁を示す平断面図である。It is a plane sectional view showing RC beam concerning other embodiments. 他の実施形態に係るＲＣ梁を示す平断面図である。It is a plane sectional view showing RC beam concerning other embodiments. 他の実施形態に係るＲＣ梁を示す平断面図である。It is a plane sectional view showing RC beam concerning other embodiments.

以下、本発明の一実施形態を、図面を参照しながら説明する。図１は、一実施形態に係る鉄筋コンクリート造の梁（以下、ＲＣ梁という）１０を示す平断面図（図２の１−１断面図）であり、図２は、図１の２−２断面図である。これらの図に示すように、本実施形態に係るＲＣ梁１０は、例えば杭式の桟橋を構成する梁であり、その中間部には、鋼管杭１の頭部が埋め込まれている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a plan sectional view (1-1 sectional view of FIG. 2) showing a reinforced concrete beam (hereinafter referred to as RC beam) 10 according to an embodiment, and FIG. 2 is a section 2-2 of FIG. FIG. As shown in these drawings, the RC beam 10 according to the present embodiment is, for example, a beam constituting a pile-type jetty, and the head portion of the steel pipe pile 1 is embedded in an intermediate portion thereof.

ＲＣ梁１０は、上下の複数の主鉄筋１２、１４を備えている。上側の主鉄筋１２は、鋼管杭１の頭部の上側を通るように配筋されている（図２参照）。一方、下側の主鉄筋１４は、鋼管杭１の頭部の高さに配筋されており、鋼管杭１を境に分断されている。   The RC beam 10 includes a plurality of upper and lower main reinforcing bars 12 and 14. The upper main reinforcing bar 12 is arranged to pass through the upper side of the head of the steel pipe pile 1 (see FIG. 2). On the other hand, the lower main reinforcing bar 14 is arranged at the height of the head of the steel pipe pile 1 and is divided at the steel pipe pile 1 as a boundary.

ここで、下側の主鉄筋１４の端部は、鋼管杭１の頭部の外周面近傍に配され、当該端部には機械式定着金具１６が結合されており、当該端部は、鋼管杭１の頭部の外周面近傍において、ＲＣ梁１０のコンクリートに定着されている。   Here, the end portion of the lower main rebar 14 is disposed in the vicinity of the outer peripheral surface of the head portion of the steel pipe pile 1, and the mechanical fixing bracket 16 is coupled to the end portion, and the end portion is a steel pipe. In the vicinity of the outer peripheral surface of the head of the pile 1, the RC beam 10 is fixed to the concrete.

ＲＣ梁１０と鋼管杭１の頭部との接合部１１には、主鉄筋１４に対して平行に配筋された複数の第一の鉄筋２０と、主鉄筋１４及び第一の鉄筋２０に対して直交するように水平に配筋された複数の第二の鉄筋２２と、鉛直に配筋された複数の第三の鉄筋２４とが備えられている。第一の鉄筋２０は、下側の主鉄筋１４より上側と下側とにそれぞれ、対をなすように配筋されており、対で配筋された第一の鉄筋２０は、鋼管杭１を梁幅方向に挟むように配筋されている。また、第一の鉄筋２０の端部は、主鉄筋１４の端部よりも鋼管杭１から離れた位置に配され、当該端部には機械式定着金具２６が結合されている。即ち、第一の鉄筋２０の端部は、主鉄筋１４の端部よりも鋼管杭１から離れた位置においてＲＣ梁１０のコンクリートに定着されている。   The joint 11 between the RC beam 10 and the head of the steel pipe pile 1 has a plurality of first rebars 20 arranged in parallel to the main rebar 14, and the main rebar 14 and the first rebar 20. A plurality of second reinforcing bars 22 arranged horizontally so as to be orthogonal to each other and a plurality of third reinforcing bars 24 arranged vertically are provided. The first reinforcing bars 20 are arranged in pairs above and below the lower main reinforcing bars 14, and the first reinforcing bars 20 arranged in pairs are connected to the steel pipe pile 1. The bars are arranged so as to be sandwiched in the beam width direction. Further, the end of the first reinforcing bar 20 is arranged at a position farther from the steel pipe pile 1 than the end of the main reinforcing bar 14, and a mechanical fixing fitting 26 is coupled to the end. That is, the end of the first reinforcing bar 20 is fixed to the concrete of the RC beam 10 at a position farther from the steel pipe pile 1 than the end of the main reinforcing bar 14.

また、主鉄筋１４の端部と第一の鉄筋２０の端部との間のコンクリートで応力が伝達されるように、主鉄筋１４と第一の鉄筋２０とが配置されている。   Moreover, the main reinforcing bar 14 and the first reinforcing bar 20 are arranged so that stress is transmitted by the concrete between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20.

第二の鉄筋２２は、主鉄筋１４と上側の第一の鉄筋２０との間と、主鉄筋１４と下側の第一の鉄筋２０との間の位置とにそれぞれ配筋され、また、平面視における主鉄筋１４の端部と第一の鉄筋２０の端部との間の位置に配筋されている。また、第二の鉄筋２２の端部は、第一の鉄筋２０よりも梁幅方向外側に配され、当該端部はＵ字状に曲げられたフック部２８となっている。即ち、第二の鉄筋２２の端部は、第一の鉄筋２０よりも梁幅方向外側においてＲＣ梁１０のコンクリートに定着されている。   The second reinforcing bars 22 are arranged between the main reinforcing bar 14 and the upper first reinforcing bar 20 and at positions between the main reinforcing bar 14 and the lower first reinforcing bar 20, respectively. The bar is arranged at a position between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20 in view. Further, the end of the second reinforcing bar 22 is arranged on the outer side in the beam width direction than the first reinforcing bar 20, and the end is a hook part 28 bent in a U-shape. That is, the end of the second reinforcing bar 22 is fixed to the concrete of the RC beam 10 on the outer side in the beam width direction than the first reinforcing bar 20.

複数の第三の鉄筋２４は、鋼管杭１の梁長さ方向両側に鋼管杭１と第二の鉄筋２２との間の位置、且つ、一対の第一の鉄筋２０の間の位置に梁幅方向に並べて配筋されており、そのうちの真中の第三の鉄筋２４は、梁幅方向中央に主鉄筋１４に挟まれるように配筋され、両側の第三の鉄筋２４は、主鉄筋１４を梁幅方向に挟むように配筋されている。また、第三の鉄筋２４の上端部は、上側の第一の鉄筋２０より上方に配され、当該上端部には機械式定着金具３０が結合されている。即ち、第三の鉄筋２４の上端部は、上側の第一の鉄筋２０よりも上方においてＲＣ梁１０のコンクリートに定着されている。また、第三の鉄筋２４の下端部は、下側の第一の鉄筋２０より下方に配され、当該下端部には機械式定着金具３２が結合されている。即ち、第三の鉄筋２４の下端部は、下側の第一の鉄筋２０よりも下方においてＲＣ梁１０のコンクリートに定着されている。なお、第三の鉄筋２４は、例えば、梁幅方向中央に１本配置したり、梁幅方向両側に各１本ずつ配置したりする等、その配置は適宜設定すればよい。   The plurality of third rebars 24 have a beam width at a position between the steel pipe pile 1 and the second rebar 22 on both sides in the beam length direction of the steel pipe pile 1 and at a position between the pair of first rebars 20. The third reinforcing bar 24 in the middle is arranged so as to be sandwiched between the main reinforcing bars 14 at the center in the beam width direction, and the third reinforcing bars 24 on both sides are connected to the main reinforcing bars 14. The bars are arranged so as to be sandwiched in the beam width direction. The upper end of the third reinforcing bar 24 is disposed above the upper first reinforcing bar 20, and a mechanical fixing bracket 30 is coupled to the upper end. That is, the upper end of the third reinforcing bar 24 is fixed to the concrete of the RC beam 10 above the upper first reinforcing bar 20. The lower end of the third reinforcing bar 24 is disposed below the lower first reinforcing bar 20, and a mechanical fixing bracket 32 is coupled to the lower end. That is, the lower end portion of the third reinforcing bar 24 is fixed to the concrete of the RC beam 10 below the lower first reinforcing bar 20. In addition, the arrangement | positioning should just set the 3rd reinforcement 24 suitably, for example, arrange | positioning one in the beam width direction center, or arrange | positioning one each on both sides of a beam width direction.

図３（Ａ）、（Ｂ）は、本実施形態に係るＲＣ梁１０の梁幅方向の作用を説明するための平断面図、図４は、ＲＣ梁１０の梁せい方向の当該作用を説明するための立断面図であり、鋼管杭１の梁長さ方向の片側の部分を示している。図３（Ａ）に示すように、鋼管杭１を挟むように配筋された一対の第一の鉄筋２０が、主鉄筋１４の端部よりも鋼管杭１から離れた位置まで延び、主鉄筋１４の端部と一対の第一の鉄筋２０の端部とがコンクリートに定着されている。このため、主鉄筋１４に引張力が作用すると、図３（Ｂ）に示すように、主鉄筋１４の端部と第一の鉄筋２０の端部との間の部位Ａは、中間部（主鉄筋１４の端部の位置）に荷重Ｐ１〜Ｐ４が作用し、その両端側（第一の鉄筋２０の端部の位置）に反力Ｒ１、Ｒ２が作用する梁のような構造になる。従って、当該部位Ａにおける鋼管杭１側には曲げ圧縮応力が生じ、その反対側には曲げ引張応力が生じる。   3A and 3B are plan sectional views for explaining the action in the beam width direction of the RC beam 10 according to the present embodiment, and FIG. 4 explains the action of the RC beam 10 in the beam direction. It is a sectional elevation for doing, and has shown the part of the one side of the beam length direction of the steel pipe pile 1. FIG. As shown in FIG. 3 (A), the pair of first reinforcing bars 20 arranged so as to sandwich the steel pipe pile 1 extend to a position farther from the steel pipe pile 1 than the end of the main reinforcing bar 14, and the main reinforcing bar The ends of 14 and the ends of the pair of first reinforcing bars 20 are fixed to the concrete. For this reason, when a tensile force acts on the main reinforcing bar 14, as shown in FIG. 3B, a portion A between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20 is an intermediate portion (main Loads P1 to P4 are applied to the ends of the reinforcing bars 14, and the structure is like a beam in which reaction forces R1 and R2 are applied to both ends thereof (positions of the ends of the first reinforcing bars 20). Therefore, bending compressive stress is generated on the steel pipe pile 1 side in the part A, and bending tensile stress is generated on the opposite side.

また、図４に示すように、主鉄筋１４を挟むように配筋された上下一対の第一の鉄筋２０が、主鉄筋１４の端部よりも鋼管杭１から離れた位置まで延び、主鉄筋１４の端部と一対の第一の鉄筋２０の端部とがコンクリートに定着されている。このため、上述の梁幅方向と同様、梁せい方向についても、主鉄筋１４に引張力が作用すると、主鉄筋１４の端部と第一の鉄筋２０の端部との間の上記部位Ａにおける鋼管杭１側には曲げ圧縮応力が生じ、その反対側には曲げ引張応力が生じる。   Further, as shown in FIG. 4, the pair of upper and lower first reinforcing bars 20 arranged so as to sandwich the main reinforcing bar 14 extend to a position farther from the steel pipe pile 1 than the end of the main reinforcing bar 14, and the main reinforcing bar The ends of 14 and the ends of the pair of first reinforcing bars 20 are fixed to the concrete. For this reason, in the same manner as the beam width direction described above, when a tensile force acts on the main rebar 14 in the beam sway direction, the region A between the end of the main rebar 14 and the end of the first rebar 20 is used. Bending compressive stress is generated on the steel pipe pile 1 side, and bending tensile stress is generated on the opposite side.

ここで、図３（Ａ）に示すように、上記部位Ａにおける曲げ引張応力が生じる位置（鋼管杭１から遠い側の位置）には、第二の鉄筋２２が、主鉄筋１４に対して直交するように水平に配筋されており、該第二の鉄筋２２の両端部が第一の鉄筋２０より梁幅方向外側においてコンクリートに定着されている。このため、当該部位Ａは、第二の鉄筋２２により十分な曲げ耐力を備えることとなる。   Here, as shown in FIG. 3A, the second reinforcing bar 22 is orthogonal to the main reinforcing bar 14 at the position where the bending tensile stress is generated in the part A (position on the side far from the steel pipe pile 1). The two reinforcing bars 22 are fixed to the concrete on the outer side in the beam width direction from the first reinforcing bar 20. For this reason, the part A is provided with sufficient bending strength by the second reinforcing bar 22.

また、図４に示すように、梁せい方向についても同様に、上記部位Ａにおける曲げ引張応力が生じる位置には、第三の鉄筋２４が、主鉄筋１４に対して直交するように鉛直に配筋されており、該第三の鉄筋２４の上端部が上側の第一の鉄筋２０より上方において、下端部が下側の第一の鉄筋２０より下方において、コンクリートに定着されている。このため、当該部位Ａは、第三の鉄筋２４により曲げ耐力を高められることにより、ＲＣ梁１０の梁せい方向についての十分な引張耐力を備えることとなる。   Also, as shown in FIG. 4, the third reinforcing bar 24 is arranged vertically so as to be orthogonal to the main reinforcing bar 14 at the position where the bending tensile stress is generated in the part A in the beam direction as well. The upper end of the third reinforcing bar 24 is fixed to the concrete above the upper first reinforcing bar 20 and the lower end is fixed to the concrete below the lower first reinforcing bar 20. For this reason, the said part A will be equipped with the sufficient tensile strength about the beam ridge direction of the RC beam 10 by the bending strength being raised by the 3rd reinforcing bar 24.

また、主鉄筋１４の端部と第一の鉄筋２０の端部との間のコンクリートで応力が伝達されるように、主鉄筋１４と第一の鉄筋２０とが配置されている。従って、ＲＣ梁１０に曲げモーメントが作用し主鉄筋１４が引張力を受けると、一方の主鉄筋１４から上記部位Ａ、第一の鉄筋２０、及び鋼管杭１を隔てた他方側の部位Ａを介して、他方の主鉄筋１４に引張力が伝達される。なお、当該部位Ａが、第三の鉄筋２４を配筋しなくても十分な梁せい方向の引張耐力を備える場合には、第三の鉄筋２４を省略してもよい。   Moreover, the main reinforcing bar 14 and the first reinforcing bar 20 are arranged so that stress is transmitted by the concrete between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20. Accordingly, when a bending moment acts on the RC beam 10 and the main reinforcing bar 14 receives a tensile force, the other part A separating the part A, the first reinforcing bar 20 and the steel pipe pile 1 from the main reinforcing bar 14 is formed. Through this, a tensile force is transmitted to the other main reinforcing bar 14. Note that the third reinforcing bar 24 may be omitted when the portion A has sufficient tensile strength in the beam constriction direction without arranging the third reinforcing bar 24.

以上説明したように、本実施形態に係るＲＣ梁１０では、第一の鉄筋２０を、鋼管杭１を挟むように対で配筋し、その端部を主鉄筋１４の端部よりも鋼管杭１から離れた位置においてコンクリートに定着させ、また、第二の鉄筋２２を、平面視において、主鉄筋１４の端部と第一の鉄筋２０の端部との間の位置に主鉄筋１４に対して直交するように配筋し、その両端部をコンクリートに定着させることにより、鋼管杭１を境に分断された主鉄筋１４の力の伝達を可能にした。従って、ＲＣ梁１０と鋼管杭１の頭部との接合部１１を施工する際における溶接作業を不要にでき、施工性を向上させることができる。   As described above, in the RC beam 10 according to the present embodiment, the first reinforcing bars 20 are arranged in pairs so as to sandwich the steel pipe pile 1, and the end portion thereof is more than the end portion of the main reinforcing bar 14. The second reinforcing bar 22 is fixed to the concrete at a position away from 1, and the second reinforcing bar 22 is located with respect to the main reinforcing bar 14 at a position between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20 in plan view. By arranging the bars so as to be orthogonal to each other and fixing both ends of the concrete to the concrete, it was possible to transmit the force of the main rebar 14 divided by the steel pipe pile 1 as a boundary. Therefore, the welding work at the time of constructing the joint 11 between the RC beam 10 and the head of the steel pipe pile 1 can be eliminated, and the workability can be improved.

また、本実施形態に係るＲＣ梁１０では、第三の鉄筋２４を、立面視において、主鉄筋１４の端部と第一の鉄筋２０の端部との間の位置に主鉄筋１４に対して直交するように配筋し、その両端部をコンクリートに定着させることにより、上記部位Ａにおける梁せい方向の引張耐力を補強している。これにより、上記部位Ａのコンクリートの梁せい方向についての引張耐力が十分でない場合であっても、鋼管杭１を境に分断された主鉄筋１４の力の伝達が可能になる。   Further, in the RC beam 10 according to the present embodiment, the third reinforcing bar 24 is positioned with respect to the main reinforcing bar 14 at a position between the end of the main reinforcing bar 14 and the end of the first reinforcing bar 20 in an elevational view. By arranging the bars so as to be orthogonal to each other and fixing both ends of the concrete to the concrete, the tensile strength in the direction of the beam in the part A is reinforced. Thereby, even if it is a case where the tensile proof stress about the beam direction of the concrete of the said part A is not enough, transmission of the force of the main rebar 14 divided by the steel pipe pile 1 as a boundary is attained.

図５は、他の実施形態に係る鉄筋コンクリート造の構造体（以下、ＲＣ構造体という）１００を示す平断面図である。この図に示すように、ＲＣ構造体１００では、ＲＣ梁１０１とＲＣ梁１０２とが直交し、これらの交差部に鋼管杭１の頭部が埋め込まれており、ＲＣ梁１０１の下側の主鉄筋１４が鋼管杭１を境に図中左右に分断され、ＲＣ梁１０２の下側の主鉄筋１４が鋼管杭１を境に図中上下に分断されている。   FIG. 5 is a plan sectional view showing a reinforced concrete structure (hereinafter referred to as an RC structure) 100 according to another embodiment. As shown in this figure, in the RC structure 100, the RC beam 101 and the RC beam 102 are orthogonal to each other, and the head portion of the steel pipe pile 1 is embedded at these intersections. The reinforcing bar 14 is divided into left and right in the figure with the steel pipe pile 1 as a boundary, and the main reinforcing bar 14 below the RC beam 102 is divided into the upper and lower parts in the figure with the steel pipe pile 1 as a boundary.

ＲＣ構造体１００では、ＲＣ梁１０１の図中左右に分断された主鉄筋１４の力の伝達を目的として、複数の第一の鉄筋２０が図中左右方向に沿って配筋されている。また、ＲＣ梁１０１の図中上下に分断された主鉄筋１４の力の伝達を目的として、複数の第一の鉄筋２０が図中上下方向に沿って配筋されている。   In the RC structure 100, a plurality of first reinforcing bars 20 are arranged along the left-right direction in the drawing for the purpose of transmitting the force of the main reinforcing bar 14 divided into the left and right in the drawing of the RC beam 101. A plurality of first reinforcing bars 20 are arranged in the vertical direction in the figure for the purpose of transmitting the force of the main reinforcing bars 14 divided in the vertical direction in the figure of the RC beam 101.

ここで、ＲＣ構造体１００では、矩形状（角部は湾曲）の第二の鉄筋１２２が鋼管杭１を囲むように配されて鋼管杭１の周囲のコンクリートに定着されている。第二の鉄筋１２２の各辺は、上記実施形態における第二の鉄筋２２と同様に配されており、鋼管杭１の図中上下左右の部位の梁幅方向についての引張耐力を高めている。従って、上述の部位Ａのような構造が、鋼管杭１の図中上下左右に形成されるため、鋼管杭１を境に図中左右に分断された主鉄筋１４の力の伝達が可能になると共に、鋼管杭１を境に図中上下に分断された主鉄筋１４の力の伝達が可能になる。   Here, in the RC structure 100, the second reinforcing bar 122 having a rectangular shape (the corner is curved) is arranged so as to surround the steel pipe pile 1 and is fixed to the concrete around the steel pipe pile 1. Each side of the second reinforcing bar 122 is arranged in the same manner as the second reinforcing bar 22 in the above-described embodiment, and increases the tensile strength in the beam width direction of the upper, lower, left and right portions of the steel pipe pile 1 in the drawing. Therefore, since the structure like the part A described above is formed on the top and bottom and left and right of the steel pipe pile 1 in the drawing, it is possible to transmit the force of the main rebar 14 divided on the steel pipe pile 1 on the left and right in the drawing. At the same time, it is possible to transmit the force of the main rebar 14 divided into the upper and lower parts in the figure with the steel pipe pile 1 as a boundary.

図６は、他の実施形態に係るＲＣ梁２００を示す平断面図である。この図に示すように、本実施形態に係るＲＣ梁２００では、鋼管杭１を境に分断された主鉄筋１４の一方側の端部は、上記実施形態と同様に鋼管杭１の外周面の近傍で機械式定着金具１６によりコンクリートに定着され、主鉄筋１４の他方側の端部は、鋼管杭１の外周面に溶接された定着プレート２に溶接されている。   FIG. 6 is a plan sectional view showing an RC beam 200 according to another embodiment. As shown in this figure, in the RC beam 200 according to the present embodiment, one end portion of the main reinforcing bar 14 divided from the steel pipe pile 1 is the outer peripheral surface of the steel pipe pile 1 as in the above embodiment. In the vicinity, it is fixed to concrete by a mechanical fixing bracket 16, and the other end of the main reinforcing bar 14 is welded to a fixing plate 2 welded to the outer peripheral surface of the steel pipe pile 1.

また、本実施形態に係るＲＣ梁２００では、上記実施形態に係る第一の鉄筋２０に替えて、第一の鉄筋２２０が設けられている。この第一の鉄筋２２０の一端部は、上記実施形態における第一の鉄筋２０と同様に、機械式定着金具２６により、第二の鉄筋２２よりも鋼管杭１から離れた位置においてコンクリートに定着されている。一方、第一の鉄筋２２０の他方側は、直角に屈曲されたフック部２２６により、他方側の主鉄筋１４の端部よりも鋼管杭１から離れた位置においてコンクリートに定着されている。   Moreover, in RC beam 200 which concerns on this embodiment, it replaces with the 1st reinforcement 20 which concerns on the said embodiment, and the 1st reinforcement 220 is provided. One end portion of the first reinforcing bar 220 is fixed to the concrete at a position farther from the steel pipe pile 1 than the second reinforcing bar 22 by the mechanical fixing bracket 26, similarly to the first reinforcing bar 20 in the above embodiment. ing. On the other hand, the other side of the first reinforcing bar 220 is fixed to the concrete at a position farther from the steel pipe pile 1 than the end of the main reinforcing bar 14 on the other side by a hook portion 226 bent at a right angle.

従って、上述の部位Ａと同様の構造が、鋼管杭１の一方側に形成され、鋼管杭１の他方側では主鉄筋１４が鋼管杭１に定着プレート２を介して結合されるため、鋼管杭１を境に分断された主鉄筋１４の力の伝達が可能になる。   Therefore, a structure similar to the above-described part A is formed on one side of the steel pipe pile 1, and the main rebar 14 is coupled to the steel pipe pile 1 via the fixing plate 2 on the other side of the steel pipe pile 1. The transmission of the force of the main rebar 14 divided by 1 is possible.

図７は、他の実施形態に係るＲＣ梁３００を示す平断面図である。この図に示すように、本実施形態に係るＲＣ梁３００では、上記実施形態における第二の鉄筋２２に替えてＰＣ鋼棒又はＰＣ鋼より線等のＰＣ鋼材３２２が設けられている。このＰＣ鋼材３２２の両端は、接合部１１の梁幅方向両端に定着されている。このため、主鉄筋１４の端部と第一の鉄筋２０との間の部位は、上述の部位Ａと同様の機能を有し、十分な曲げ耐力を備える。また、ＰＣ鋼材３２２に緊張力を付与することにより、主鉄筋１４の端部と第一の鉄筋２０との間の部位に有害なひび割れが発生することを防止できる。   FIG. 7 is a plan sectional view showing an RC beam 300 according to another embodiment. As shown in this figure, in the RC beam 300 according to the present embodiment, a PC steel material 322 such as a PC steel rod or a PC steel wire is provided in place of the second rebar 22 in the above embodiment. Both ends of the PC steel material 322 are fixed to both ends of the joint portion 11 in the beam width direction. For this reason, the site | part between the edge part of the main reinforcement 14 and the 1st reinforcement 20 has a function similar to the above-mentioned site | part A, and is equipped with sufficient bending strength. Further, by applying tension to the PC steel material 322, it is possible to prevent harmful cracks from being generated in a portion between the end of the main reinforcing bar 14 and the first reinforcing bar 20.

従って、上述の部位Ａと同様の構造が、主鉄筋１４の端部と第一の鉄筋２０との間の部位に形成されるため、鋼管杭１を境に分断された主鉄筋１４の力の伝達が可能になる。   Therefore, since the same structure as the above-mentioned part A is formed in the part between the end of the main rebar 14 and the first rebar 20, the force of the main rebar 14 divided by the steel pipe pile 1 as a boundary. Communication is possible.

図８は、他の実施形態に係るＲＣ梁４００を示す平断面図である。この図に示すように、本実施形態に係るＲＣ梁４００では、上記実施形態に係る第二の鉄筋２２に替えて第二の鉄筋４２２及び第二の鉄筋４２２の端部に重ね継手により接合された定着筋４２８を備えている。定着筋４２８にはＵ字状に曲げられたフック部が設けられており、該フック部が第一の鉄筋２０よりも梁幅方向外側においてコンクリートに定着されている。   FIG. 8 is a plan sectional view showing an RC beam 400 according to another embodiment. As shown in this figure, in the RC beam 400 according to this embodiment, the second rebar 422 and the end of the second rebar 422 are joined by lap joints in place of the second rebar 22 according to the above embodiment. The fixing muscle 428 is provided. The fixing bar 428 is provided with a hook part bent in a U-shape, and the hook part is fixed to the concrete outside the first reinforcing bar 20 in the beam width direction.

従って、上述の部位Ａと同様の構造が、主鉄筋１４の端部と第一の鉄筋２０との間の部位に形成されるため、鋼管杭１を境に分断された主鉄筋１４の力の伝達が可能になる。   Therefore, since the same structure as the above-mentioned part A is formed in the part between the end of the main rebar 14 and the first rebar 20, the force of the main rebar 14 divided by the steel pipe pile 1 as a boundary. Communication is possible.

なお、上述の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定するものではない。本発明はその趣旨を逸脱することなく、変更、改良され得ると共に本発明にはその等価物が含まれることは勿論である。例えば、上述の各実施形態では、ＲＣ梁やＲＣ梁が十字状に交差したＲＣ構造体を例に挙げて本発明を説明したが、ＲＣ造のスラブ等の他のコンクリート構造体にも本発明を適用できる。   In addition, the above-mentioned embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof. For example, in each of the embodiments described above, the present invention has been described by taking an RC beam or an RC structure in which RC beams intersect in a cross shape as an example, but the present invention is also applied to other concrete structures such as RC slabs. Can be applied.

また、上述の各実施形態では、介在物として鋼管杭が埋め込まれたＲＣ構造体を例に挙げて本発明を説明したが、介在物としては、場所打ち杭等の他の杭や柱や壁やブロック等の他のものも挙げられる。また、上述の実施形態に係るＲＣ梁３００では、その他の実施形態における第二の鉄筋２２をＰＣ鋼材３２２に変えたが、第一の鉄筋２０、第三の鉄筋２４についてもＰＣ鋼材に変えてもよい。また、引張補強材としては、鉄筋やＰＣ鋼材には限られず、形鋼やＦＲＰ製の棒材や鋼管やフラットバー等の他の引張力に抵抗する部材も挙げられる。   In each of the above-described embodiments, the present invention has been described by taking an RC structure embedded with steel pipe piles as inclusions. However, as inclusions, other piles such as cast-in-place piles, columns, and walls are used. And other things such as blocks. Moreover, in RC beam 300 which concerns on the above-mentioned embodiment, although the 2nd rebar 22 in other embodiments was changed into PC steel material 322, the 1st rebar 20 and the 3rd rebar 24 are also changed into PC steel material. Also good. Moreover, as a tensile reinforcement material, it is not restricted to a reinforcing bar or PC steel material, The member which resists other tensile forces, such as a shaped steel, a bar made from FRP, a steel pipe, and a flat bar, is also mentioned.

さらに、上述の各実施形態では、鉄筋の端部に機械式定着金具やフック部等の定着部を設けることにより鉄筋の端部をコンクリートに定着させたが、鉄筋の端部がコンクリートに定着した状態を維持できるのであれば、フック等を設けずに直筋にて定着させてもよい。   Further, in each of the above-described embodiments, the end of the reinforcing bar is fixed to the concrete by providing a fixing part such as a mechanical fixing bracket or a hook part at the end of the reinforcing bar, but the end of the reinforcing bar is fixed to the concrete. If the state can be maintained, the straight line may be fixed without providing a hook or the like.

１ 鋼管杭（介在物）、２ 定着プレート、１０ ＲＣ梁（コンクリート構造体）、１１ 接合部、１２、１４ 主鉄筋、１６ 機械式定着金具、２０ 第一の鉄筋（第一の引張補強部材）、２２ 第二の鉄筋（第二の引張補強部材）、２４ 第三の鉄筋（第三の引張補強部材）、２６ 機械式定着金具、２８ フック部、３０、３２ 機械式定着金具、１００ ＲＣ構造体、１０１、１０２ ＲＣ梁、１２２ 第二の鉄筋（第二の引張補強部材）、２００ ＲＣ梁（コンクリート構造体）、２２０ 第一の鉄筋（第一の引張補強部材）、２２６ フック部、３００ ＲＣ梁（コンクリート構造体）、３２２ ＰＣ鋼材（第二の引張補強部材）、４００ ＲＣ梁（コンクリート構造体）、４２２ 第二の鉄筋（第二の引張補強部材）、４２８ 定着筋（第二の引張補強部材） DESCRIPTION OF SYMBOLS 1 Steel pipe pile (inclusion), 2 anchoring plate, 10 RC beam (concrete structure), 11 joint part, 12, 14 main reinforcement, 16 mechanical anchoring metal fittings, 20 1st reinforcement (1st tension reinforcement member) 22 Reinforcing bar (second tensile reinforcing member) 24 Third reinforcing bar (third tensile reinforcing member) 26 Mechanical fixing bracket 28 Hook part 30, 32 Mechanical fixing bracket 100 RC structure Body, 101, 102 RC beam, 122 second reinforcing bar (second tensile reinforcing member), 200 RC beam (concrete structure), 220 first reinforcing bar (first tensile reinforcing member), 226 hook part, 300 RC beam (concrete structure), 322 PC steel (second tensile reinforcement member), 400 RC beam (concrete structure), 422 Second rebar (second tensile reinforcement member), 428 Anchor reinforcement (second Tensile reinforcement member)

Claims (4)

主鉄筋が介在物を境に分断されたコンクリート構造体であって、
前記介在物を挟むように対で配された引張補強部材であり、その端部が前記主鉄筋の端部よりも前記介在物から離れた位置に配されてコンクリートに定着された第一の引張補強部材と、
平面視において、前記主鉄筋の端部と前記第一の引張補強部材の端部との間の位置で前記主鉄筋に対して交差するように配された引張補強部材であり、その両端部がコンクリートに定着された第二の引張補強部材と、
を備えるコンクリート構造体。 A concrete structure in which the main rebar is divided by inclusions,
A tensile reinforcement member arranged in pairs so as to sandwich the inclusions, and a first tensile member whose end is arranged at a position farther from the inclusion than the end of the main reinforcing bar and fixed to the concrete A reinforcing member;
In plan view, it is a tensile reinforcement member arranged so as to intersect the main reinforcing bar at a position between the end of the main reinforcing bar and the end of the first tensile reinforcing member, and both ends thereof are A second tensile reinforcement member fixed to the concrete;
A concrete structure comprising: 立面視において、前記主鉄筋の端部と前記第一の引張補強部材の端部との間の位置で前記主鉄筋に対して交差するように配された引張補強部材であり、その両端部がコンクリートに定着された第三の引張補強部材を備える請求項１に記載のコンクリート構造体。   In an elevational view, it is a tensile reinforcement member arranged so as to intersect the main reinforcing bar at a position between the end of the main reinforcing bar and the end of the first tensile reinforcing member, and both ends thereof The concrete structure according to claim 1, further comprising a third tensile reinforcement member fixed to the concrete. 前記第一、第二、第三の引張補強部材は、鉄筋、ＰＣ鋼材、又はＦＲＰ製部材である請求項１又は請求項２に記載のコンクリート構造体。   3. The concrete structure according to claim 1, wherein the first, second, and third tensile reinforcing members are reinforcing bars, PC steel, or FRP members. 前記介在物は杭である請求項１から請求項３までの何れか１項に記載のコンクリート構造体。   The concrete structure according to any one of claims 1 to 3, wherein the inclusion is a pile.
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