JP2014234652A - Expansion joint for concrete structure - Google Patents
Expansion joint for concrete structure Download PDFInfo
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- JP2014234652A JP2014234652A JP2013117445A JP2013117445A JP2014234652A JP 2014234652 A JP2014234652 A JP 2014234652A JP 2013117445 A JP2013117445 A JP 2013117445A JP 2013117445 A JP2013117445 A JP 2013117445A JP 2014234652 A JP2014234652 A JP 2014234652A
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- concrete structure
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- expansion
- expansion joint
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- 239000000463 material Substances 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Sewage (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
本発明はコンクリート構造物用伸縮継手に係り、特にコンクリート構造物間の隙間を密閉するコンクリート構造物用伸縮継手に関する。 The present invention relates to an expansion joint for a concrete structure, and more particularly to an expansion joint for a concrete structure that seals a gap between the concrete structures.
コンクリートで構築されるコンクリート構造物である水路や共同溝等の地中に構築される暗渠などのつなぎ部である目地部には、内外を止水することが行われる。この場合、両側のコンクリート構造物が不均一に沈下したりあるいは地震等の影響により、目地部を挟んだ両側のコンクリート構造物の間の間隔がずれたりするが、これらのずれを許容するように、可撓性の伸縮継手を設けたコンクリート構造物用伸縮継手が採用されている。このようなコンクリート構造物用伸縮継手として、例えば特許文献1が知られている。 Water is stopped inside and outside the joints, which are connecting parts such as underdrains constructed in the ground such as waterways and joint grooves that are concrete structures constructed of concrete. In this case, the concrete structure on both sides sinks unevenly or the distance between the concrete structures on both sides with the joints shifted due to the effects of an earthquake, etc. The expansion joint for concrete structures provided with a flexible expansion joint is employed. For example, Patent Document 1 is known as such an expansion joint for concrete structures.
しかしながら、例えば特許文献1にあっては、一度、アンカーボルトナットで目地部に跨る可撓部材の両側でコンクリート構造物に押し付け固定した後には、衝撃等で緩んだとしても、可撓部材をさらに押し付けることができないためにアンカーボルトナットを増し締めすることができないという問題があった。 However, in Patent Document 1, for example, once the anchor member is pressed against the concrete structure on both sides of the flexible member straddling the joint with the anchor bolt nut, the flexible member is There was a problem that the anchor bolt nut could not be tightened because it could not be pressed.
また、従来のコンクリート構造物用伸縮継手においては、可撓部材の内側から高い内圧が係った場合に、可撓部材がコンクリート構造物の面に対してシ−ル性が弱くなるという問題があった。 Moreover, in the conventional expansion joint for concrete structures, when a high internal pressure is applied from the inside of the flexible member, there is a problem that the sealing property of the flexible member is weak against the surface of the concrete structure. there were.
そこで、本願発明は上記従来技術の有する問題を解消し、可撓性材の伸縮部をコンクリート構造物に対して有効に締め付けることができ、シール性の高いコンクリート構造物用伸縮継手を提供することである。 Accordingly, the invention of the present application provides an expansion joint for a concrete structure that can solve the above-described problems of the prior art and can effectively tighten the expansion / contraction portion of the flexible material to the concrete structure and has a high sealing performance. It is.
上記課題を解決するために、本願発明に係るコンクリート構造物用伸縮継手は、コンクリート構造物の間の目地部を跨って配設され、前記コンクリート構造物に押し付けられる押し部を両側に有する可撓性材の伸縮部と、前記押し部に長手方向に渡って被せられる断面コの字状の当接部と、前記押し部に被せられた前記当接部を、前記当接部の長手方向に間隔を置いて複数箇所に前記コンクリート構造物に押し付け固定するための複数の固定ユニットと、を備え、前記固定ユニットは、前記目地部の側に位置する内側角部から下方に折れた短脚と前記目地部の反対側に位置する外側角部から下方に折れた長脚とを有し、前記長脚が前記コンクリート構造物に接触する断面変形コの字状の前記当接部に被せられる当圧部と、前記押し部に被せられた前記当接部に前記当圧部を被せた状態で前記当圧部を前記コンクリート構造物に押し取り付け前記押し部を前記コンクリート構造物に押し付けるためのボルトとナットとからなるアンカーボルトナットとを有し、前記押し部に被せられた前記当接部は、断面視において前記ボルトに対し前記目地部の側に位置することを特徴とする。 In order to solve the above-mentioned problems, an expansion joint for a concrete structure according to the present invention is provided across a joint between concrete structures, and has a flexible portion having pressing parts on both sides that are pressed against the concrete structure. An elastic material expansion / contraction part, a U-shaped abutting part that covers the pressing part in the longitudinal direction, and the abutting part that covers the pressing part in the longitudinal direction of the abutting part. A plurality of fixing units for pressing and fixing to the concrete structure at a plurality of positions at intervals, and the fixing unit includes short legs bent downward from an inner corner located on the joint portion side. A long leg bent downward from an outer corner located on the opposite side of the joint, and the long leg is put on the abutting portion having a U-shaped cross-section deformed in contact with the concrete structure. The pressure part and the pressing part An anchor bolt nut comprising a bolt and a nut for pressing the pressing portion against the concrete structure and pressing the pressing portion against the concrete structure in a state where the pressing portion is put on the contact portion. And the abutting portion placed on the pressing portion is located on the joint portion side with respect to the bolt in a cross-sectional view.
また、前記伸縮部は両側の前記押し部の間に波状ユニットが繰り返す波状部を有し、前記押し部に最隣接する前記波状ユニットは、前記押し部の内側下部から前記コンクリート構造物面に沿って伸びてから波状に立ち上がっていることを特徴とする。 In addition, the expansion / contraction part has a waved part that repeats a waved unit between the pressing parts on both sides, and the waved unit closest to the pressing part is along the concrete structure surface from the inner lower part of the pressing part. It is characterized by standing up in a wavy shape.
また、前記押し部の下面から突出する突起が形成されていることを特徴とする。 In addition, a protrusion protruding from the lower surface of the pressing portion is formed.
また、前記伸縮部の上側にカバーゴムが被せられ、前記カバーゴムの端部は前記押し部と前記当接部との間に巻かれていることを特徴とする。 Further, a cover rubber is put on the upper side of the expansion / contraction part, and an end part of the cover rubber is wound between the pressing part and the contact part.
また、前記当圧部は、一枚の鉄鋼材板の4つの角部を切断し、両側部を前記短脚と前記長脚として下方へ折りまげ、前後部を上方へ折り曲げたものである
ことを特徴とすることを特徴とする。
Moreover, the said pressure part cut | disconnects the four corner | angular parts of one steel plate, folds down both sides as the said short leg and said long leg, and bends the front-back part upwards. It is characterized by.
本願発明の構成によれば、押し部に被せられた当接部は、断面視においてボルトに対し目地部の側に位置し、長脚の下端部が支点として作用するので、アンカーボルトナットによる締め付け力を有効に押し部に作用することが可能になる。 According to the configuration of the present invention, the abutting portion covered by the pressing portion is located on the joint portion side with respect to the bolt in the cross-sectional view, and the lower end portion of the long leg acts as a fulcrum. It becomes possible to act on the pushing portion effectively.
また、コンクリート構造物には押し部のみを押し付けることができるので、増し締めを容易に行うことができる。 Moreover, since only a pushing part can be pressed against a concrete structure, retightening can be performed easily.
また、伸縮部は内圧を受ける場合に、押し部は目地部の側へ力の引きつけられるように力を受けることによって目地部側へ圧縮変形するので、セルフシール性を発揮することが可能になる。 In addition, when the expansion / contraction part is subjected to internal pressure, the pressing part is compressed and deformed to the joint part side by receiving a force so that the force is attracted to the joint part side, so that the self-sealing property can be exhibited. .
図1は、本願発明に係るコンクリート構造物用伸縮継手の一実施形態を示す断面図である。図1において、コンクリート構造物用伸縮継手1は、コンクリート構造物2の間の目地部3を跨って配設され、コンクリート構造物2に押し付けられる押し部4を両側に有する可撓性材の伸縮部5と、押し部4に長手方向に渡って被せられる断面コの字状の当接部6と、押し部4に被せられた当接部6を、当接部6の長手方向に間隔を置いて複数箇所にコンクリート構造物4に押し付け固定するための複数の固定ユニット10とを備えている。 FIG. 1 is a cross-sectional view showing an embodiment of an expansion joint for a concrete structure according to the present invention. In FIG. 1, the expansion joint 1 for a concrete structure is disposed over a joint portion 3 between the concrete structures 2, and is a flexible material expansion and contraction having pressing portions 4 that are pressed against the concrete structure 2 on both sides. The portion 5, the abutting portion 6 having a U-shaped cross section covering the pushing portion 4 in the longitudinal direction, and the abutting portion 6 covering the pushing portion 4 are spaced apart in the longitudinal direction of the abutting portion 6. A plurality of fixing units 10 are provided to be placed and pressed against the concrete structure 4 at a plurality of locations.
固定ユニット10は、目地部3の側に位置する内側角部11aから下方に折れた短脚11bと目地部3の反対側に位置する外側角部11cから下方に折れた長脚11dとを有し、長脚11dがコンクリート構造物2に接触する断面変形コの字状の当接部6に被せられる当圧部11と、押し部4に被せられた当接部6に当圧部11を被せた状態で当圧部11をコンクリート構造物2に押し取り付け押し部4をコンクリート構造物2に押し付けるためのボルト12とナット13とからなるアンカーボルトナット14とを有する。 The fixed unit 10 has a short leg 11b bent downward from the inner corner 11a located on the joint 3 side and a long leg 11d bent downward from the outer corner 11c located on the opposite side of the joint 3. Then, the pressure part 11 is applied to the pressure part 11 that is applied to the contact part 6 having a U-shaped cross-section where the long leg 11 d contacts the concrete structure 2, and the contact part 6 that is applied to the push part 4. An anchor bolt nut 14 including a bolt 12 and a nut 13 for pressing and attaching the pressing portion 11 to the concrete structure 2 and pressing the pressing portion 4 against the concrete structure 2 is provided.
押し部4に被せられた当接部6は、断面視においてボルト12に対し目地部3の側に位置する。すなわち、図1において、右側の当接部6は右側のボルト12に対し目地部3の側に位置し、左の当接部6は左側のボルト12に対し目地部3の側に位置する。 The abutting portion 6 covered by the pressing portion 4 is positioned on the joint portion 3 side with respect to the bolt 12 in a cross-sectional view. That is, in FIG. 1, the right contact portion 6 is positioned on the joint portion 3 side with respect to the right bolt 12, and the left contact portion 6 is positioned on the joint portion 3 side with respect to the left bolt 12.
伸縮部は両側の押し部4の間に波状ユニットが繰り返す波状部16を有し、押し部4に最隣接する波状ユニット17は、押し部4の内側下部4aからコンクリート構造物の面2aに沿って伸びてから波状に立ち上がっている立ち上がり部17aを有する。 The stretchable part has a wave-like part 16 in which the wave-like unit repeats between the pushing parts 4 on both sides, and the wave-like unit 17 closest to the pushing part 4 extends from the inner lower part 4a of the pushing part 4 along the surface 2a of the concrete structure. And has a rising portion 17a that rises in a wavy shape.
押し部4の下面には、突出する突起4aが形成されている。押し部4がコンクリート構造物2の面2aに押し付けられることによって突起4aが圧縮変形され、シール性がより確実になる。 A protruding protrusion 4 a is formed on the lower surface of the pressing portion 4. When the pressing portion 4 is pressed against the surface 2a of the concrete structure 2, the protrusion 4a is compressed and deformed, and the sealing performance is further ensured.
伸縮部5の上側にカバーゴム19が被せられ、カバーゴム19の端部19aは押し部4と当接部6との間に巻かれている。 A cover rubber 19 is put on the upper side of the expansion / contraction part 5, and an end 19 a of the cover rubber 19 is wound between the pressing part 4 and the contact part 6.
伸縮部5は止水可能にゴム材からなり、図1の紙面に垂直方向に長手状に形成されている。押し部4は断面がほぼ四方体でブロック状に形成されている。断面コの字状の当接部6は金属材からなり、図1の紙面に垂直方向に長手状に形成され、単位長さのものが連続的に連結されている。 The stretchable part 5 is made of a rubber material so as to be able to stop water, and is formed in a longitudinal shape in a direction perpendicular to the paper surface of FIG. The pushing portion 4 has a substantially rectangular parallelepiped shape and is formed in a block shape. The abutting portion 6 having a U-shaped cross section is made of a metal material and is formed in a longitudinal shape in a direction perpendicular to the paper surface of FIG.
図1に示すように、当接部6は押し部4の上半部に上から被せ置かれて配設されている。当圧部11の短脚11bは、当接部6の内側脚部6aを越えて下方へ出ないような長さを有する。押し部4に最隣接する波状ユニット17の立ち上がり部17aは、押し部4の内側下部4aから伸びコンクリート構造物の面2aと当接部6の脚部6aの端部との間から目地部3の側へ立ち上がっている。 As shown in FIG. 1, the abutting portion 6 is disposed on the upper half of the pushing portion 4 so as to be placed from above. The short leg 11b of the pressure part 11 has such a length that it does not protrude downward beyond the inner leg part 6a of the contact part 6. The rising portion 17a of the corrugated unit 17 closest to the pushing portion 4 extends from the inner lower portion 4a of the pushing portion 4 to the joint portion 3 from between the surface 2a of the concrete structure and the end of the leg portion 6a of the abutting portion 6. Standing up to the side.
ボルト12はコンクリート構造物2に打ち込められ、ナット13は当圧部11の上に置かれたワッシャ18を介してボルト12の頂部側からボルト12に締め付けられる。 The bolt 12 is driven into the concrete structure 2, and the nut 13 is fastened to the bolt 12 from the top side of the bolt 12 through a washer 18 placed on the pressure-applying portion 11.
図4はコンクリート構造物用伸縮継手1を示す平面図であり、図5は図4に対応する端面図である。図4に示されるように、複数の固定ユニット10が間隔を置いて当接部6の長手方向に配設され、押し部4に被せられた当接部6をアンカーボルトナット14によってコンクリート構造物4に押し付け固定する。 4 is a plan view showing the expansion joint 1 for a concrete structure, and FIG. 5 is an end view corresponding to FIG. As shown in FIG. 4, a plurality of fixing units 10 are arranged in the longitudinal direction of the abutting portion 6 at intervals, and the abutting portion 6 covered by the pushing portion 4 is anchored by an anchor bolt nut 14 to a concrete structure. Press to 4 and fix.
次に、図6を参照して一枚の鉄鋼材板から簡易に製造される当圧部11について説明する。図6(a)は一枚の鉄鋼材板から4つの隅を切断した組立前の当圧部11を示す。図6(b)は組立後の当圧部11を示す。当圧部11は、内側角部11aから下方に折られる短脚11bと、外側角部11cから下方に折られる長脚11dと、前側と後側とで上方に折られる同等の高さの起立部11e、11fと、中央部の基部11gと、基部11gに形成されたアンカーボルトナット1用の穴部11hとを備えている。 Next, with reference to FIG. 6, the pressure part 11 manufactured simply from one steel plate will be described. Fig.6 (a) shows the pressing part 11 before the assembly which cut | disconnected four corners from one steel plate. FIG. 6B shows the pressing portion 11 after assembly. The pressure part 11 is a short leg 11b that is folded downward from the inner corner part 11a, a long leg 11d that is folded downward from the outer corner part 11c, and an upright stand that is folded upward at the front side and the rear side. It includes portions 11e and 11f, a central base portion 11g, and a hole 11h for the anchor bolt nut 1 formed in the base portion 11g.
当圧部11は一枚の鉄鋼材板を材料とするので、簡易に安価に製造することができる。また、当圧部11においては、左右に対向する短脚11bと長脚11dとが下方に向き、前後に対向する起立部11e、11fが上方に向いているので、高い耐ねじれ性を有し、一枚の鉄鋼材板から簡易に製造したにもかかわらず、高い強度を有する。 Since the pressing portion 11 is made of a single steel plate, it can be easily and inexpensively manufactured. Moreover, in the pressure part 11, since the short leg 11b and the long leg 11d which oppose right and left are facing downward, and the standing parts 11e and 11f which oppose front and back are upward, it has high torsion resistance. Despite being simply manufactured from a single steel plate, it has high strength.
次に、本実施形態に係るコンクリート構造物用伸縮継手1においては、アンカーボルトナット14を用いて、伸縮部5の押し部4をコンクリート構造物2に対して極めて有効に押し当てることができることについて説明する。 Next, in the expansion joint 1 for a concrete structure according to the present embodiment, it is possible to extremely effectively press the pressing portion 4 of the expansion / contraction portion 5 against the concrete structure 2 using the anchor bolt nut 14. explain.
前述したように、押し部4に被せられた当接部6は、断面視においてボルト12に対し目地部3の側に位置する。また、当圧部11の長脚11dのみがコンクリート構造物2に接触し、短脚11bはコンクリート構造物2に接触しない。また、当接部6の下端部もコンクリート構造物2に接触しない。この結果、アンカーボルトナット14のボルト12をナット13で締め付け当圧部11を押し付ける場合に、長脚11dの下端部が支点として作用し、押し部4に被せられた当接部6はボルト12に対し目地部3の側に位置するので、アンカーボルトナット14に付加する力によるトルクは拡大され、ボルト12に対し目地部3の側に位置する押し部4を有効に押し付けることが可能になる。 As described above, the abutting portion 6 covered by the pressing portion 4 is located on the joint portion 3 side with respect to the bolt 12 in a sectional view. In addition, only the long legs 11 d of the pressure member 11 are in contact with the concrete structure 2, and the short legs 11 b are not in contact with the concrete structure 2. Further, the lower end portion of the contact portion 6 does not contact the concrete structure 2. As a result, when the bolt 12 of the anchor bolt nut 14 is fastened with the nut 13 and the pressing portion 11 is pressed, the lower end portion of the long leg 11d acts as a fulcrum, and the abutting portion 6 covered by the pressing portion 4 is the bolt 12. Since it is located on the joint portion 3 side, the torque due to the force applied to the anchor bolt nut 14 is increased, and the push portion 4 located on the joint portion 3 side can be effectively pressed against the bolt 12. .
また、ボルト12をナット13で締め付ける場合に、押し部4のみがコンクリート構造物2に押し付けられ当接部6の下端部等がコンクリート構造物2に押し付けられることはない。この結果、アンカーボルトナット14で押し部4をコンクリート構造物2に固定した後に衝撃等で締め付けが緩んだとしても、ボルト12をナット13でさらに締め付けてアンカーボルトナット14を増し締めすることが可能になる。 Further, when the bolt 12 is tightened with the nut 13, only the pressing portion 4 is pressed against the concrete structure 2, and the lower end portion of the contact portion 6 is not pressed against the concrete structure 2. As a result, even if the fastening portion 4 is fixed to the concrete structure 2 with the anchor bolt nut 14 and tightening is loosened due to impact or the like, the bolt 12 can be further tightened with the nut 13 to further tighten the anchor bolt nut 14. become.
次に、本実施形態に係るコンクリート構造物用伸縮継手1においては、目地部3から伸縮部5の内側へ高い内圧が係った場合においても、有効にセルフシール性を発揮することができることについて説明する。 Next, in the expansion joint 1 for a concrete structure according to the present embodiment, even when a high internal pressure is applied from the joint portion 3 to the inside of the expansion / contraction portion 5, the self-sealing property can be effectively exhibited. explain.
図2は通常時の状態を示し、図3は目地部3から伸縮部5の内側へ高い内圧が作用した状態を示す。図2において、アンカーボルトナット14の作用によって押し部11に圧力P1が作用し、押し部11は圧力P2でコンクリート構造物2の面に押し付けられている。 FIG. 2 shows a normal state, and FIG. 3 shows a state in which a high internal pressure is applied from the joint portion 3 to the inside of the stretchable portion 5. In FIG. 2, the pressure P1 acts on the pushing part 11 by the action of the anchor bolt nut 14, and the pushing part 11 is pressed against the surface of the concrete structure 2 with the pressure P2.
前述したように、押し部4に最隣接する波状ユニット17は、押し部4の内側下部4aからコンクリート構造物の面2aに沿って伸びてから波状に立ち上がっている立ち上がり部17aを有し、立ち上がり部17aは、押し部4の内側下部4aから伸びコンクリート構造物の面2aと当接部6の内側脚部6aの端部との間から目地部3の側へ立ち上がっている。この結果、図3に示すように、目地部3から伸縮部5の内側へ高い内圧が作用すると、立ち上がり部17aはより高く立ち上がるように内圧を受け、押し部4は目地部3の側へ力の引きつけられるように力を受ける。押し部4は上半部が当接部6に納められており上下方向には変形できないので、押し部4は、目地部3の側へ引きつけられるように力を受けることによって目地部3側へ圧縮変形する。当接部6の外側脚部6b及びカバーゴム19の端部19aと押し部11の外側端面との間には隙間4cが生じる。押し部4が目地部3の側へ圧縮変形することによる結果、押し部4は図3で符号P3で示すように内側下方へ向く弾性力を生み、圧力P2は図2における場合に比べて増大する。圧力P2が増大することによって、押し部4はコンクリート構造物の面2aにより強く押し付けられ、セルフシール性を発揮することが可能になる。 As described above, the corrugated unit 17 closest to the pushing portion 4 has the rising portion 17a that extends from the inner lower portion 4a of the pushing portion 4 along the surface 2a of the concrete structure and rises in a wavy shape. The portion 17a extends from the inner lower portion 4a of the pushing portion 4 and rises from the space between the surface 2a of the concrete structure and the end of the inner leg portion 6a of the contact portion 6 to the joint portion 3 side. As a result, as shown in FIG. 3, when a high internal pressure is applied from the joint portion 3 to the inside of the stretchable portion 5, the rising portion 17 a receives the internal pressure so as to rise higher, and the pushing portion 4 exerts a force toward the joint portion 3. Receive power to be attracted. Since the upper half of the pushing portion 4 is housed in the contact portion 6 and cannot be deformed in the vertical direction, the pushing portion 4 is moved toward the joint portion 3 side by receiving a force so as to be attracted to the joint portion 3 side. Compressive deformation. A gap 4 c is formed between the outer leg portion 6 b of the contact portion 6 and the end portion 19 a of the cover rubber 19 and the outer end surface of the pressing portion 11. As a result of the pressing portion 4 being compressed and deformed toward the joint portion 3, the pressing portion 4 generates an elastic force directed inward and downward as indicated by reference numeral P3 in FIG. 3, and the pressure P2 is increased as compared with the case in FIG. To do. As the pressure P2 increases, the pressing portion 4 is strongly pressed against the surface 2a of the concrete structure, and can exhibit self-sealing properties.
以上のように、本実施形態に係るコンクリート構造物用伸縮継手1の構成によれば、長脚11dの下端部が支点として作用し、押し部11はボルト12に対し目地部3の側に位置するので、アンカーボルトナット14による締め付け力を有効に押し部4に作用することが可能になる。 As described above, according to the configuration of the expansion joint 1 for a concrete structure according to the present embodiment, the lower end portion of the long leg 11d acts as a fulcrum, and the pushing portion 11 is positioned on the joint portion 3 side with respect to the bolt 12. Therefore, the tightening force by the anchor bolt nut 14 can be effectively applied to the pushing portion 4.
また、コンクリート構造物2には押し部11のみを押し付けることができるので、増し締めを容易に行うことができる。 Moreover, since only the pressing part 11 can be pressed against the concrete structure 2, retightening can be performed easily.
また、伸縮部5は内圧を受ける場合に、押し部4は目地部3の側へ力の引きつけられるように力を受けることによって目地部3側へ圧縮変形するので、セルフシール性を発揮することが可能になる。 Further, when the expansion / contraction part 5 receives internal pressure, the pushing part 4 is compressed and deformed to the joint part 3 side by receiving a force so that the force is attracted to the joint part 3 side. Is possible.
1 コンクリート構造物用伸縮継手
2 コンクリート構造物
3 目地部
4 押し部
5 伸縮部
6 当接部
10 固定ユニット
11 当圧部
11b 短脚
11d 長脚
12 ボルト
13 ナット
14 アンカーボルトナット
16 波状部
17 押し部に最隣接する波状ユニット
19 カバーゴム
DESCRIPTION OF SYMBOLS 1 Expansion joint for concrete structures 2 Concrete structure 3 Joint part 4 Push part 5 Elastic part 6 Contact part 10 Fixing part 11 Pressure part 11b Short leg 11d Long leg 12 Bolt 13 Nut 14 Anchor bolt nut 16 Wave-like part 17 Push Wave unit closest to the part 19 Cover rubber
Claims (5)
前記押し部に長手方向に渡って被せられる断面コの字状の当接部と、
前記押し部に被せられた前記当接部を、前記当接部の長手方向に間隔を置いて複数箇所に前記コンクリート構造物に押し付け固定するための複数の固定ユニットと、
を備え、
前記固定ユニットは、
前記目地部の側に位置する内側角部から下方に折れた短脚と前記目地部の反対側に位置する外側角部から下方に折れた長脚とを有し、前記長脚が前記コンクリート構造物に接触する断面変形コの字状の前記当接部に被せられる当圧部と、
前記押し部に被せられた前記当接部に前記当圧部を被せた状態で前記当圧部を前記コンクリート構造物に押し取り付け前記押し部を前記コンクリート構造物に押し付けるためのボルトとナットとからなるアンカーボルトナットと
を有し、
前記押し部に被せられた前記当接部は、断面視において前記ボルトに対し前記目地部の側に位置する
ことを特徴とするコンクリート構造物用伸縮継手。 A stretchable portion of a flexible material that is disposed across the joint between the concrete structures and has a pressing portion that is pressed against the concrete structure on both sides;
An abutting portion having a U-shaped cross section that covers the pushing portion in the longitudinal direction;
A plurality of fixing units for pressing and fixing the abutting portion covered by the pressing portion to the concrete structure at a plurality of positions at intervals in the longitudinal direction of the abutting portion;
With
The fixing unit is
A short leg bent downward from an inner corner located on the side of the joint and a long leg bent downward from an outer corner located on the opposite side of the joint; the long leg being the concrete structure A pressure-applying portion that covers the abutting portion having a U-shaped cross section that contacts an object;
From the bolts and nuts for pressing the pressing part against the concrete structure and pressing the pressing part against the concrete structure in a state where the pressing part is put on the contact part covered by the pressing part. An anchor bolt and nut
The expansion joint for concrete structures, wherein the abutting portion covered by the pressing portion is located on the joint portion side with respect to the bolt in a cross-sectional view.
ことを特徴とする請求項1記載のコンクリート構造物用伸縮継手。 The expansion / contraction part has a wave-like part that repeats a wave-like unit between the push parts on both sides, and the wave-like unit closest to the push part extends from the inner lower part of the push part along the concrete structure surface. The expansion joint for concrete structures according to claim 1, wherein the expansion joint for a concrete structure rises in a wavy shape.
ことを特徴とする請求項1記載のコンクリート構造物用伸縮継手。 The expansion joint for concrete structures according to claim 1, wherein a protrusion protruding from the lower surface of the pressing portion is formed.
ことを特徴とする請求項1記載のコンクリート構造物用伸縮継手。 2. The expansion and contraction for a concrete structure according to claim 1, wherein a cover rubber is placed on an upper side of the expansion and contraction portion, and an end portion of the cover rubber is wound between the pressing portion and the contact portion. Fittings.
ことを特徴とする請求項1記載のコンクリート構造物用伸縮継手。 The pressing portion is obtained by cutting four corners of a steel plate, folding the both sides downward with the short legs and the long legs, and bending the front and rear parts upward. The expansion joint for concrete structures according to claim 1.
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JP2013117445A JP6054253B2 (en) | 2013-06-04 | 2013-06-04 | Expansion joints for concrete structures |
TW103116694A TWI595141B (en) | 2013-06-04 | 2014-05-12 | Expansion joints for concrete structures |
KR1020140067046A KR102159841B1 (en) | 2013-06-04 | 2014-06-02 | Expansion joint for concrete structure |
CN201410246029.8A CN104213539B (en) | 2013-06-04 | 2014-06-04 | Concrete structure expansion joint |
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JP2017179718A (en) * | 2016-03-28 | 2017-10-05 | 西武ポリマ化成株式会社 | Fixing member for flexible water cutoff member |
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KR20140142666A (en) | 2014-12-12 |
CN104213539B (en) | 2017-08-29 |
KR102159841B1 (en) | 2020-09-24 |
JP6054253B2 (en) | 2016-12-27 |
TW201510328A (en) | 2015-03-16 |
CN104213539A (en) | 2014-12-17 |
TWI595141B (en) | 2017-08-11 |
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