JP2002332694A - Construction of joint portion of reinforced concrete structure - Google Patents
Construction of joint portion of reinforced concrete structureInfo
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- JP2002332694A JP2002332694A JP2001138396A JP2001138396A JP2002332694A JP 2002332694 A JP2002332694 A JP 2002332694A JP 2001138396 A JP2001138396 A JP 2001138396A JP 2001138396 A JP2001138396 A JP 2001138396A JP 2002332694 A JP2002332694 A JP 2002332694A
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- joint
- joint portion
- concrete
- reinforced concrete
- concrete structure
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンクリートの乾
燥収縮に起因するひび割れの発生防止を主たる目的とし
て用いられる鉄筋コンクリート構造物の目地部の構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a reinforced concrete structure mainly used for preventing cracks caused by drying shrinkage of concrete.
【０００２】[0002]
【従来の技術】従来のこの種の目地部の構造としては、
例えば防油堤である鉄筋コンクリート構造物の目地部の
構造がある。これは、伸縮目地を設けて防油堤を複数に
分割されたブロックとし、目地部に伸縮目地材及び止液
板を配設するとともに、伸縮目地を挟む一方の側がコン
クリートに定着され、他方の側がコンクリートに滑動自
在に挿入されるようなスリップバーを配設してなるもの
である。2. Description of the Related Art Conventional joint structures of this type include:
For example, there is a joint structure of a reinforced concrete structure which is an oil levee. In this, an oil-filled dike is provided as a block divided into a plurality of blocks by providing an expansion joint, an expansion joint material and a liquid stopping plate are arranged at the joint portion, and one side sandwiching the expansion joint is fixed to concrete, and the other is fixed to concrete. A slip bar is provided such that the side is slidably inserted into the concrete.
【０００３】かかる防油堤の目地部の構造によれば、伸
縮目地を設けて防油堤を複数に分割されたブロックとし
たので、該伸縮目地において各ブロックの伸縮を吸収さ
せることができ、それゆえ、コンクリートの乾燥収縮に
起因するひび割れの発生を防止することが可能となる。
しかも、スリップバーの伸縮目地を挟む両側がコンクリ
ートに挿入される構造となっているので、地盤の強さの
不均一に起因する目違いの発生をも防止することが可能
となる。[0003] According to the structure of the joint portion of the oil barrier, the expansion joint is provided and the oil barrier is divided into a plurality of blocks, so that the expansion and contraction of each block can be absorbed at the expansion joint. Therefore, it is possible to prevent the occurrence of cracks due to the drying shrinkage of the concrete.
In addition, since both sides of the expansion joint of the slip bar are inserted into the concrete, it is possible to prevent misalignment due to uneven strength of the ground.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな防油堤の目地部の構造では、スリップバーのせん断
抵抗力が目違いを防止できる程度に止まるため、例えば
地震により地盤が液状化し、その結果、目地部が非常に
大きなせん断力を受けた場合には、目地部が変形し又は
損壊してしまい、構造物の形状や機能を保持できない虞
が大きい。However, in such a joint structure of an oil levee, since the shear resistance of the slip bar is small enough to prevent misalignment, the ground liquefies due to an earthquake, for example. As a result, when the joint receives a very large shearing force, the joint is deformed or damaged, and there is a great possibility that the shape and function of the structure cannot be maintained.
【０００５】加えて、防油堤が液状化の可能性のある地
盤に設置される場合には、非常に煩雑な作業を伴う防油
堤目地部の漏えい防止措置（消防危第３２号通知）が必
要となる。すなわち、防油堤の目地部の内側又は外側
に、ゴム製等で耐候性、耐油性を有する可撓性材を、十
分な止液性、変形追随性を確保できるような構造形式で
取り付けて、該伸縮目地からの油の漏えいを防止できる
ような措置を各伸縮目地でとる必要がある。[0005] In addition, in the case where the oil dike is installed on the ground where there is a possibility of liquefaction, measures to prevent leakage of the oil dike joint with extremely complicated work are required (notification of fire brigade No. 32). Is required. That is, a flexible material having weather resistance and oil resistance made of rubber or the like is attached to the inside or outside of the joint portion of the oil levee in a structural form capable of securing sufficient liquid stopping properties and deformation followability. It is necessary to take measures at each expansion joint to prevent oil from leaking from the expansion joint.
【０００６】なお、配力筋を連続的に配置するような方
法は、そもそもコンクリートの乾燥収縮に起因するひび
割れの発生を防止できない。Incidentally, a method of continuously arranging the distribution bars cannot prevent the occurrence of cracks due to drying shrinkage of concrete in the first place.
【０００７】そこで、本発明の課題は、コンクリートの
乾燥収縮に起因するひび割れの発生を回避されるととも
に、目地部が非常に大きなせん断力を受けた場合にも、
構造物の形状や機能を損なうことがないように、目地部
の変形や損壊が確実に防止されるような鉄筋コンクリー
ト構造物の目地部の構造を提供することにある。Therefore, an object of the present invention is to avoid the occurrence of cracks caused by the drying shrinkage of concrete and to prevent joints from receiving a very large shearing force.
An object of the present invention is to provide a joint structure of a reinforced concrete structure in which deformation or damage of the joint is reliably prevented so as not to impair the shape and function of the structure.
【０００８】[0008]
【課題を解決するための手段】すなわち、本発明に係る
鉄筋コンクリート構造物の目地部の構造は、鉄筋コンク
リート構造物の目地部において、伸縮目地を挟む両側
が、対向する配力筋の芯方向を同時に拘束する状態とし
て、コンクリートに挿入され、少なくともいずれか一方
の側が、該配力筋及び該コンクリートに対して滑動自在
であり、該目地部におけるせん断力に抵抗する方向拘束
部材を含むことを特徴としている。That is, the joint structure of the reinforced concrete structure according to the present invention is such that, on the joint portion of the reinforced concrete structure, both sides sandwiching the expansion / contraction joint simultaneously have the core directions of the opposing distribution bars parallel. As a restraining state, it is inserted into concrete, at least one side is slidable with respect to the distribution muscle and the concrete, and includes a direction restraining member that resists shearing force at the joint. I have.
【０００９】本発明に係る鉄筋コンクリート構造物の目
地部の構造によれば、伸縮目地において各ブロックの伸
縮が吸収されるので、コンクリートの乾燥収縮に起因す
るひび割れが発生しない。According to the joint structure of the reinforced concrete structure according to the present invention, the expansion and contraction of each block is absorbed at the expansion and contraction joint, so that cracks due to drying shrinkage of the concrete do not occur.
【００１０】そして、方向拘束部材を用いて配力筋が水
平方向で連続する構造としたので、目地部が非常に大き
なせん断力を受けた場合にも、目地部の変形や損壊は確
実に防止されることになる。したがって、該鉄筋コンク
リート構造物の形状や機能を損なうこととはならない。[0010] Since the distribution muscles are continuous in the horizontal direction using the directional restraint member, even when the joint is subjected to a very large shearing force, the joint is reliably prevented from being deformed or damaged. Will be done. Therefore, the shape and function of the reinforced concrete structure are not impaired.
【００１１】このような技術的手段において、「方向拘
束部材」としては、伸縮目地を挟む両側が、対向する配
力筋の芯方向を同時に拘束する状態として、コンクリー
トに挿入され、少なくともいずれか一方の側が、滑動自
在に配力筋の芯方向を拘束するとともに滑動自在にコン
クリートに挿入され、該伸縮目地におけるせん断力に抵
抗し得るものであれば、どのような形状、構造のもの、
どのような材質のものを採用しても差し支えない。In such a technical means, as the “directional restraint member”, both sides sandwiching the expansion joint are inserted into the concrete in a state of simultaneously restraining the core directions of the opposing force distribution bars, and at least one of them is inserted. Side is slidably restrained in the core direction of the distributing muscle and slidably inserted into the concrete, as long as it can resist the shearing force at the expansion joint, of any shape and structure,
Any material can be used.
【００１２】ただし、施工の容易性を確保しようとする
観点からすれば、「方向拘束部材」は、鞘管であるよう
に構成することができる。However, from the viewpoint of ensuring the ease of construction, the "directional restraint member" can be configured to be a sheath tube.
【００１３】[0013]
【発明の実施の形態】以下、添付図面に基づいて本発明
の実施の形態を詳細に説明する。図１は本発明の一実施
の形態に係る鉄筋コンクリート構造物の目地部１１の構
造の概略構成を示す斜視図、図２は該鉄筋コンクリート
構造物の目地部１１の構造の詳細構成を示す断面図であ
る。なお、図１において、主筋の図示を略し、配力筋の
みを示している。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a schematic configuration of a joint 11 of a reinforced concrete structure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a detailed configuration of a joint 11 of the reinforced concrete structure. is there. In FIG. 1, the illustration of the main muscles is omitted, and only the force distribution muscles are shown.
【００１４】本実施の形態における鉄筋コンクリート構
造物たる防油堤１の目地部１１の構造は、図１に示すよ
うに、伸縮目地１ａを設けて防油堤１を複数に分割され
たブロックとし、目地材１１ａ及び止液板１１ｂを配設
してなる防油堤１の目地部１１において、方向拘束部材
である鞘管１２を含むものとして構成されている。As shown in FIG. 1, the joint 11 of the oil barrier 1 serving as a reinforced concrete structure according to the present embodiment has a structure in which an expandable joint 1a is provided and the oil barrier 1 is divided into a plurality of blocks. In the joint section 11 of the oil barrier 1 in which the joint material 11a and the liquid stopping plate 11b are provided, the joint section 11 is configured to include a sheath tube 12 which is a direction restricting member.
【００１５】本実施の形態において、この鞘管１２は、
目地部１１におけるせん断力に抵抗する役割を果たすも
のである。この鞘管１２は、地震により地盤が液状化し
た場合に目地部１１において発生するような非常に大き
なせん断力に抵抗することも可能となっている。それゆ
え、本実施の形態における鞘管１２としては、かかる非
常に大きなせん断力に対応し得る強度をもつ鋼管が用い
られている。なお、実際には、配力筋と同程度の強度の
ある鋼管が用いられる。In the present embodiment, the sheath tube 12 is
It plays a role of resisting the shearing force at the joint portion 11. The sheath tube 12 can also withstand a very large shear force generated at the joint portion 11 when the ground liquefies due to the earthquake. Therefore, as the sheath tube 12 in the present embodiment, a steel tube having a strength capable of coping with such an extremely large shear force is used. Actually, a steel pipe having the same strength as the distribution muscle is used.
【００１６】この鞘管１２は、具体的には、同図に示す
ように、防油堤１の目地部１１において対向する配力筋
１３の組のすべてに対して取り付けられている。As shown in FIG. 1, the sheath tube 12 is attached to all the pairs of force distribution bars 13 facing each other at the joint portion 11 of the oil barrier 1.
【００１７】また、この鞘管１２は、同図に示すよう
に、伸縮目地１ａにおいて予め目地材１１ａに開設した
穴を貫くように配設されている。そして、この鞘管１２
は、図２に示すように、伸縮目地１ａを挟む両側が、対
向する配力筋１３の芯方向を同時に拘束する状態とし
て、コンクリート１４に挿入されている。Further, as shown in FIG. 1, the sheath tube 12 is disposed so as to penetrate a hole previously formed in the joint material 11a in the expansion joint 1a. And this sheath tube 12
As shown in FIG. 2, both sides of the elastic joint 1 a are inserted into the concrete 14 in a state where the core directions of the opposing force distribution bars 13 are simultaneously restricted.
【００１８】すなわち、この鞘管１２は、同図に示すよ
うに、内径が配力筋１３の外径よりも僅かに大きく設定
されているので、配力筋１３を鞘管１２に貫入されるこ
とにより、配力筋１３の芯方向が拘束されることにな
る。That is, as shown in the figure, the inner diameter of the sheath tube 12 is set slightly larger than the outer diameter of the distributing muscle 13, so that the distributing muscle 13 penetrates into the sheath tube 12. As a result, the core direction of the distribution muscle 13 is restricted.
【００１９】そして、この鞘管１２は、伸縮目地１ａを
挟む一方の側が、配力筋１３及びコンクリート１４に対
して滑動自在となっている。また、伸縮目地１ａを挟む
他方の側も、配力筋１３に対しては滑動自在となってい
る。One side of the sheath tube 12 sandwiching the expansion joint 1a is slidable with respect to the distribution bars 13 and the concrete 14. Further, the other side of the expansion joint 1 a is also slidable with respect to the force distribution muscle 13.
【００２０】すなわち、この鞘管１２は、内径が配力筋
１３の外径よりも僅かに大きく設定されていることに加
え、配力筋１３の鞘管１２に貫入される部分には、瀝青
材が塗布されているので、鞘管１２の配力筋１３に対す
る滑動自在性は円滑かつ十分に確保されている。That is, in addition to the inner diameter of the sheath tube 12 being set slightly larger than the outer diameter of the distributing muscle 13, the portion of the distributing muscle 13 penetrating into the sheath tube 12 has a bitumen Since the material is applied, the slidability of the sheath tube 12 with respect to the force distribution muscles 13 is smoothly and sufficiently secured.
【００２１】加えて、この鞘管１２のコンクリート１４
に貫入される部分にも、鞘管１２のコンクリート１４に
対する滑動自在性も円滑かつ十分に確保されるような措
置をとる。このような措置としては、例えば鞘管１２に
断熱材たる発泡スチロールや目地材などを巻き付けると
いう方法がある。In addition, the concrete 14 of the sheath tube 12
A measure is taken to ensure that the slidability of the sheath tube 12 with respect to the concrete 14 is also smooth and sufficiently secured in the portion penetrating into the through hole. As such a measure, for example, there is a method in which styrofoam or a joint material serving as a heat insulating material is wound around the sheath tube 12.
【００２２】次に、図１及び図２を参考にして、本実施
の形態に係る防油堤１の目地部１１の構造の構築方法に
ついて説明する。なお、図１及び図２は、いずれも該防
油堤１の目地部１１の構造の構築が完了した時点の状態
を示している。Next, with reference to FIGS. 1 and 2, a method for constructing the structure of the joint portion 11 of the oil levee 1 according to the present embodiment will be described. 1 and 2 show the state at the time when the construction of the joint portion 11 of the oil levee 1 has been completed.
【００２３】今、防油堤１の目地部１１において、目地
材１１ａ及び止液板１１ｂが配設されているとともに、
伸縮目地１ａを挟む両側とも、立ち上がり部の鉄筋の組
立が完了しているが、コンクリート１４の打設が完了し
てない状態にある。At the joint portion 11 of the oil levee 1, a joint material 11a and a liquid stopping plate 11b are provided.
On both sides of the expansion joint 1a, assembling of the reinforcing bar at the rising portion has been completed, but the placing of the concrete 14 has not been completed.
【００２４】このような状態において、鞘管１２が、予
め対向する配力筋１３に対応する目地材１１ａの部位に
開設された穴を貫くように取り付けられる。In such a state, the sheath tube 12 is attached so as to penetrate through a hole previously formed in the joint material 11a corresponding to the opposing force distribution bar 13.
【００２５】次いで、伸縮目地１ａを挟む一方の側にお
いて、配力筋１３を含む鉄筋の組立が行われる。この鉄
筋の組立には、目地材１１ａに取り付けられた鞘管１２
に対して、瀝青材を塗布した配力筋１３の端部を貫入さ
せる作業が含まれる。Next, on one side of the expansion joint 1a, a reinforcing bar including the force distribution bar 13 is assembled. To assemble this reinforcing steel, the sheath tube 12 attached to the joint material 11a is used.
On the other hand, an operation of penetrating the end of the distribution bar 13 coated with the bitumen material is included.
【００２６】続いて、伸縮目地１ａを挟む一方の側にお
ける鉄筋の組立が完了した後、該一方の側において、コ
ンクリート１４の打設が行われる。Subsequently, after the assembly of the reinforcing bar on one side sandwiching the expansion joint 1a is completed, the concrete 14 is cast on the one side.
【００２７】次いで、伸縮目地１ａを挟む他方の側にお
いて、配力筋１３を含む鉄筋の組立が行われる。この鉄
筋の組立には、目地材１１ａに取り付けられた鞘管１２
に対して、瀝青材を塗布した配力筋１３の端部を貫入さ
せる作業が含まれる。Next, on the other side of the expansion joint 1a, a reinforcing bar including the distribution bars 13 is assembled. To assemble this reinforcing steel, the sheath tube 12 attached to the joint material 11a is used.
On the other hand, an operation of penetrating the end of the distribution bar 13 coated with the bitumen material is included.
【００２８】そして、伸縮目地１ａを挟む他方の側にお
ける鉄筋の組立が完了した後、該他方の側において、コ
ンクリート１４の打設が行われる。これにより、防油堤
１の目地部１１の構造の構築が完了する。After the rebar is assembled on the other side of the expansion joint 1a, the concrete 14 is cast on the other side. Thereby, construction of the structure of the joint part 11 of the oil levee 1 is completed.
【００２９】以上説明したように、本実施の形態に係る
防油堤１の目地部１１の構造によれば、伸縮目地１ａが
各ブロックの伸縮を吸収するので、コンクリート１４の
乾燥収縮に起因するひび割れが発生するようなこととは
ならない。そして、鞘管１２を用いて配力筋１３が水平
方向で連続する構造としたので、目地部１１が非常に大
きなせん断力を受けたような場合においても、目地部１
１の変形や損壊を確実に防止できる。よって、防油堤１
の形状や機能を損なうようなことは起こり得ない。As described above, according to the structure of the joint portion 11 of the oil barrier 1 according to the present embodiment, since the expansion joint 1a absorbs the expansion and contraction of each block, it is caused by the drying shrinkage of the concrete 14. It does not mean that cracks occur. Since the distribution muscles 13 are continuous in the horizontal direction using the sheath tube 12, even when the joint portion 11 receives a very large shearing force, the joint portion 1 is not affected.
1 can be reliably prevented from being deformed or damaged. Therefore, oil dike 1
It is unlikely that the shape or function of the device will be impaired.
【００３０】[0030]
【発明の効果】本発明に係る鉄筋コンクリート構造物の
目地部の構造によれば、以上のように構成したため、コ
ンクリートの乾燥収縮に起因するひび割れの発生を回避
されるとともに、目地部が非常に大きなせん断力を受け
た場合にも、構造物の形状や機能を損なうことがないよ
うに、目地部の変形や損壊が確実に防止されることにな
る。According to the joint structure of the reinforced concrete structure according to the present invention, since the structure described above is employed, it is possible to avoid the occurrence of cracks due to the drying shrinkage of the concrete and to make the joint area extremely large. Even when a shear force is applied, deformation and damage of the joints are reliably prevented so that the shape and function of the structure are not impaired.
【図１】本発明の一実施の形態に係る鉄筋コンクリート
構造物の目地部の構造の概略構成を示す斜視図である。FIG. 1 is a perspective view showing a schematic configuration of a joint of a reinforced concrete structure according to an embodiment of the present invention.
【図２】本発明の一実施の形態に係る鉄筋コンクリート
構造物の目地部の構造の詳細構成を示す断面図である。FIG. 2 is a cross-sectional view showing a detailed configuration of a joint of a reinforced concrete structure according to an embodiment of the present invention.
１…防油堤（鉄筋コンクリート構造物） １ａ…伸縮目地 １１…目地部 １１ａ…目地材 １１ｂ…止液板 １２…鞘管（方向拘束部材） １３…配力筋 １４…コンクリート DESCRIPTION OF SYMBOLS 1 ... Oil barrier (Reinforced concrete structure) 1a ... Expansion joint 11 ... Joint part 11a ... Joint material 11b ... Liquid stopping plate 12 ... Sheath tube (direction restriction member) 13 ... Distributing muscle 14 ... Concrete
Claims (2)
て、伸縮目地を挟む両側が、対向する配力筋の芯方向を
同時に拘束する状態として、コンクリートに挿入され、
少なくともいずれか一方の側が、該配力筋及び該コンク
リートに対して滑動自在であり、該目地部におけるせん
断力に抵抗する方向拘束部材を含むことを特徴とする、
鉄筋コンクリート構造物の目地部の構造。At the joint portion of a reinforced concrete structure, both sides sandwiching an expansion joint are inserted into concrete in a state of simultaneously constraining the core directions of opposing distribution bars,
At least one side is slidable with respect to the distribution bars and the concrete, and includes a directional restraint member that resists shearing force at the joint.
Joint structure of reinforced concrete structure.
特徴とする、請求項１に記載の鉄筋コンクリート構造物
の目地部の構造。2. The joint structure of a reinforced concrete structure according to claim 1, wherein the direction restricting member is a sheath tube.
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| JP2001138396A JP4755359B2 (en) | 2001-05-09 | 2001-05-09 | Joint structure of reinforced concrete structure |
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| JP2001138396A JP4755359B2 (en) | 2001-05-09 | 2001-05-09 | Joint structure of reinforced concrete structure |
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| JP2002332694A true JP2002332694A (en) | 2002-11-22 |
| JP4755359B2 JP4755359B2 (en) | 2011-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240038A (en) * | 2018-03-15 | 2018-07-03 | 北京城建集团有限责任公司 | Super plane concrete structure and construction method based on multi-level network form post-cast strip |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120870B (en) * | 2016-08-12 | 2018-03-16 | 上海嘉实（集团）有限公司 | The advanced enclosed construction of poured band of outer wall of basement and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335937A (en) * | 1986-07-31 | 1988-02-16 | 住友金属工業株式会社 | Expansion joint structure of structure |
| JPH03233045A (en) * | 1990-02-07 | 1991-10-17 | Takenaka Komuten Co Ltd | Concrete body of building |
| JPH07119215A (en) * | 1993-10-21 | 1995-05-09 | Shimizu Corp | Construction method for concrete placing joint part and buried material used for this method |
| JPH08240032A (en) * | 1995-03-02 | 1996-09-17 | Tokyo Gas Co Ltd | Connecting structure for side wall and continuous underground wall in underground structure |
-
2001
- 2001-05-09 JP JP2001138396A patent/JP4755359B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335937A (en) * | 1986-07-31 | 1988-02-16 | 住友金属工業株式会社 | Expansion joint structure of structure |
| JPH03233045A (en) * | 1990-02-07 | 1991-10-17 | Takenaka Komuten Co Ltd | Concrete body of building |
| JPH07119215A (en) * | 1993-10-21 | 1995-05-09 | Shimizu Corp | Construction method for concrete placing joint part and buried material used for this method |
| JPH08240032A (en) * | 1995-03-02 | 1996-09-17 | Tokyo Gas Co Ltd | Connecting structure for side wall and continuous underground wall in underground structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240038A (en) * | 2018-03-15 | 2018-07-03 | 北京城建集团有限责任公司 | Super plane concrete structure and construction method based on multi-level network form post-cast strip |
| CN108240038B (en) * | 2018-03-15 | 2023-09-08 | 北京城建集团有限责任公司 | Ultra-large plane concrete structure based on multistage grid type post-cast strip and construction method |
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| JP4755359B2 (en) | 2011-08-24 |
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