JP3804942B2 - Box culvert elastic joint - Google Patents

Box culvert elastic joint Download PDF

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Publication number
JP3804942B2
JP3804942B2 JP2002202233A JP2002202233A JP3804942B2 JP 3804942 B2 JP3804942 B2 JP 3804942B2 JP 2002202233 A JP2002202233 A JP 2002202233A JP 2002202233 A JP2002202233 A JP 2002202233A JP 3804942 B2 JP3804942 B2 JP 3804942B2
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Japan
Prior art keywords
joint
box culvert
water stop
elastic
elastic joint
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Expired - Fee Related
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JP2002202233A
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Japanese (ja)
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JP2004044189A (en
Inventor
裕介 海野
修 長谷川
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ジオスター株式会社
西武ポリマ化成株式会社
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Priority to JP2002202233A priority Critical patent/JP3804942B2/en
Publication of JP2004044189A publication Critical patent/JP2004044189A/en
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Description

【0001】
【発明の属する技術分野】
この発明は、例えば、プレキャスト樋門の各函体としたボックスカルバートの接合部に設ける弾性継手に関するものである。
【0002】
【従来の技術】
従来の弾性継手としては、例えば、CRゴム材などで形成しており、プレキャスト樋門の各函体とした各ボックスカルバートの間の接合部に設けるものが知られている。そして、この弾性継手は、接合部の変形による接触で、各ボックスカルバートの接合部が損傷してしまうことを防止することにより、各ボックスカルバート(各函体)の接合部を変形できるようにした柔構造のプレキャスト樋門としている。
【0003】
【発明が解決しようとする課題】
前述した従来の弾性継手では、各ボックスカルバート(各函体)の相対変位で生じる接合部の目開きによって、各ボックスカルバートの接合部への土砂の浸入を防止することができない。そして、この浸入した土砂は、接合部の曲げや剪断力による変形性能を損なう原因となる。
【0004】
そのため、この土砂の浸入を防ぐためとして、従来では、各ボックスカルバート(各函体)の接合部の外周面に、別途、耐圧プレートを設置している。しかし、この耐圧プレートの設置は、施工現場での作業が多く、作業性のみならず安全性や品質について多くの課題を残していた。
【0005】
また、前述した従来の弾性継手では、例えば、プレキャスト樋門の変形に追従して行われる、各ボックスカルバート(各函体)の間における接合部の止水を、必ずしも確実に行えるものではなかった。
【0006】
この発明は前述した事情に鑑みて創案されたもので、その目的は各ボックスカルバートの接合部において、土砂の浸入を確実に阻止できると共に、止水を確実に行えるボックスカルバートの弾性継手を提供することにある。
【0007】
この発明での弾性継手は、PC緊張材で一体化してなる各ボックスカルバートの接合部に設けている弾性材の止水部と、各ボックスカルバートの外周面に接合部を覆うように設けている弾性材の土砂浸入阻止用のプレート部とを備えている。
【0008】
そして、プレート部は、ボックスカルバートの外周面に沿って配設されて接合部を覆っている板状の本体と、この本体から接合部内に延びる脚部とから断面略T字状に形成されている。また、止水部は、その厚みを脚部の厚みの2倍以上にして、プレート部の脚部に一体形成している。
【0009】
このようなこの発明によれば、弾性継手として止水部とプレート部とを一体形成し、接合部の変形で生じる各ボックスカルバートの接触による接合部の損傷を防止するための弾性継手と、土砂の流入を阻止する耐圧プレートとを一体化した状態の構造としたことにより、弾性継手の止水性能と、弾性継手の変形性能(接合部の変形への追随性)とを向上させることができる。
【0010】
また、この発明の弾性継手では、プレート部の本体と止水部を有する脚部とから、断面略T字状に形成されているので、各ボックスカルバートの間の接合部へのセットを容易に行うことができる。
【0011】
【発明の実施の形態】
以下、この発明のボックスカルバートの弾性継手を図示する一実施形態によって説明する。
【0012】
軸方向に隣接して設置される複数個のボックスカルバート2において、その各ボックスカルバート2間の接合部3に設けられる弾性継手1(図1〜図3参照)は、接合部3に設けている弾性材の止水部4と、各ボックスカルバート2の外周面に接合部3を覆うように設けている弾性材の土砂浸入阻止用のプレート部5とを備えている。
【0013】
そして、プレート部5は、ボックスカルバート2の外周面に沿って配設されて接合部3を覆っている板状の本体5aと、この本体5aから接合部3内に延びる脚部5bとから断面略T字状に形成されている。また、止水部4は、その厚みを脚部5bの厚みの2倍以上にして、プレート部5の脚部5bに一体形成している。
【0014】
なお、図1〜図3において、符号6は、各ボックスカルバート2を一体化しているPC緊張材である。
【0015】
この実施形態でのプレート部5は、やや厚い板状の本体5aと、この本体5aの中央部から接合部3内に延びておりやや薄い板状の脚部5bとから、断面略T字状に形成されている。
【0016】
この実施形態での止水部4は、その厚みを脚部5bの厚みの2倍以上にしていると共に、その断面形状を円形状にして、脚部5bの接合部3内側の端部に脚部5bと一体形成されている。即ち、この止水部4は、プレート部5と一体形成されている。
【0017】
このように止水部4の厚みを脚部5bの厚みの2倍以上にしていると共に、止水部4の断面形状を円形状にすると、接合部3の変形に確実に追従させることができて、接合部3が変形しても止水効果を確実に維持できる。また、この止水部4としては、中空や水膨張ゴムとの併用も有効である。
【0018】
なお、止水部4およびプレート部5を一体形成してなる弾性継手1の硬度としては、弾性変形領域を広く確保するために硬度30〜100(硬度50程度が適切)にすることが考えられる。
【0019】
また、弾性継手1の形態としては、単一材料で形成した形態や、中空構造にした形態や、中心をスポンジ状物質にした複合材料の形態が考えられる。
【0020】
図3〜図5は、この発明の弾性継手1の別形態を示すものである。そして、図3は、プレート部5の脚部5bに一体形成している止水部4を方形状に形成したものである。また、図4は、その止水部4を八角形状に形成したものである。さらに、図5は、その止水部4を内部に中空部を有する円形状に形成したものである。
【0021】
このような構成からなるこの発明の弾性継手1によれば、弾性継手1として止水部4とプレート部5とを一体形成し、接合部3の変形で生じる各ボックスカルバート2の接触による接合部3の損傷を防止するための弾性継手と、土砂の流入を阻止する耐圧プレートとを一体化した状態の構造としたことにより、弾性継手1の止水性能と変形性能(接合部の変形への追随性)とを向上させることができる。
【0022】
また、この発明の弾性継手1では、プレート部5の本体5aと止水部4を有する脚部5bとから、断面略T字状に形成されているので、各ボックスカルバート2の間の接合部3へのセットを容易に行うことができる。
【0023】
【発明の効果】
この発明の弾性継手では、弾性継手として止水部とプレート部とを一体形成し、接合部の変形で生じる各ボックスカルバートの接触による接合部の損傷を防止するための弾性継手と、土砂の流入を阻止する耐圧プレートとを一体化した状態の構造としている。
【0024】
そのため、弾性継手の止水性能と、弾性継手の変形性能(接合部の変形への追随性)とを向上させることができる。
【0025】
また、この発明の弾性継手では、プレート部の本体と止水部を有する脚部とから、断面略T字状に形成されているので、各ボックスカルバートの間の接合部へのセットを容易に行うことができる。
【図面の簡単な説明】
【図1】(a)はこの発明のボックスカルバートの弾性継手を示しており、図2のA−A線概略断面図で、(b)は(a)のB部拡大断面図である。
【図2】この発明の弾性継手に設けたボックスカルバートを示す概略図である。
【図3】この発明の弾性継手の別形態を示す概略断面図である。
【図4】この発明の弾性継手の別形態を示す概略断面図である。
【図5】この発明の弾性継手の別形態を示す概略断面図である。
【符号の説明】
1…弾性継手、2…ボックスカルバート、3…接合部、4…止水部、5…プレート部、5a…本体、5b…脚部、6…PC緊張材。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, an elastic joint provided at a joint portion of a box culvert as each box of a precast lock.
[0002]
[Prior art]
As a conventional elastic joint, for example, one formed of a CR rubber material and provided at a joint portion between each box culvert as each box of a precast lock is known. And this elastic joint made it possible to deform | transform the junction part of each box culvert (each box) by preventing that the junction part of each box culvert was damaged by the contact by deformation | transformation of a junction part. It is a flexible precast lock.
[0003]
[Problems to be solved by the invention]
In the above-described conventional elastic joint, it is impossible to prevent the intrusion of earth and sand into the joint portion of each box culvert due to the opening of the joint portion caused by the relative displacement of each box culvert (each box). And this infiltrated earth and sand becomes the cause which impairs the deformation | transformation performance by the bending and shear force of a junction part.
[0004]
Therefore, in order to prevent the intrusion of the earth and sand, conventionally, a pressure-resistant plate is separately installed on the outer peripheral surface of the joint portion of each box culvert (each box). However, the installation of the pressure plate has a lot of work on the construction site, and has left many problems concerning not only workability but also safety and quality.
[0005]
Moreover, in the conventional elastic joint mentioned above, the water stop of the junction part between each box culvert (each box) performed, for example following a deformation | transformation of a precast lock was not necessarily performed reliably. .
[0006]
The present invention was devised in view of the above-described circumstances, and an object thereof is to provide an elastic joint of a box culvert that can surely prevent intrusion of earth and sand and can surely stop water at the joint of each box culvert. There is.
[0007]
The elastic joint in this invention is provided so that the water stop part of the elastic material provided in the joint part of each box culvert integrated with PC tension material and the joint part may be covered on the outer peripheral surface of each box culvert. And a plate portion for preventing the intrusion of elastic material.
[0008]
The plate portion is formed in a substantially T-shaped cross section from a plate-like main body disposed along the outer peripheral surface of the box culvert and covering the joint portion, and a leg portion extending from the main body into the joint portion. Yes. Moreover, the water stop part is formed integrally with the leg part of the plate part so that the thickness thereof is twice or more the thickness of the leg part.
[0009]
According to the present invention, the water stop portion and the plate portion are integrally formed as an elastic joint, and the elastic joint for preventing damage to the joint portion due to the contact of each box culvert caused by the deformation of the joint portion, By adopting a structure in which the pressure-resistant plate that prevents inflow of water is integrated, it is possible to improve the water stop performance of the elastic joint and the deformation performance of the elastic joint (followability to deformation of the joint). .
[0010]
Moreover, in the elastic joint of this invention, since it forms in the cross-section substantially T shape from the leg part which has the main body of a plate part, and a water stop part, the set to the junction part between each box culvert is easy. It can be carried out.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an elastic coupling of a box culvert according to the present invention will be described with reference to an illustrated embodiment.
[0012]
In the plurality of box culverts 2 installed adjacent to each other in the axial direction, the elastic joint 1 (see FIGS. 1 to 3) provided at the joint portion 3 between the box culverts 2 is provided at the joint portion 3. The water stop part 4 of an elastic material and the plate part 5 for preventing the invasion of earth and sand of the elastic material provided so as to cover the joint part 3 on the outer peripheral surface of each box culvert 2 are provided.
[0013]
The plate portion 5 is a cross-section from a plate-like main body 5a disposed along the outer peripheral surface of the box culvert 2 and covering the joint portion 3, and a leg portion 5b extending from the main body 5a into the joint portion 3. It is formed in a substantially T shape. Moreover, the water stop part 4 is formed integrally with the leg part 5b of the plate part 5 by making its thickness more than twice the thickness of the leg part 5b.
[0014]
In FIG. 1 to FIG. 3, reference numeral 6 denotes a PC tendon material in which the box culverts 2 are integrated.
[0015]
The plate portion 5 in this embodiment has a substantially thick plate-like main body 5a and a slightly thin plate-like leg portion 5b extending from the center portion of the main body 5a into the joint portion 3 and having a substantially T-shaped cross section. Is formed.
[0016]
The water stop portion 4 in this embodiment has a thickness that is at least twice the thickness of the leg portion 5b, a circular cross-section, and a leg at the inner end of the joint portion 3 of the leg portion 5b. It is integrally formed with the part 5b. That is, the water stop portion 4 is formed integrally with the plate portion 5.
[0017]
Thus, while making the thickness of the water stop part 4 more than twice the thickness of the leg part 5b, and making the cross-sectional shape of the water stop part 4 circular, it can be made to follow the deformation | transformation of the junction part 3 reliably. Even if the joint 3 is deformed, the water stop effect can be reliably maintained. Moreover, as this water stop part 4, combined use with a hollow or water expansion rubber | gum is also effective.
[0018]
The hardness of the elastic joint 1 formed by integrally forming the water stop portion 4 and the plate portion 5 may be 30 to 100 (hardness of about 50 is appropriate) in order to ensure a wide elastic deformation region. .
[0019]
As the form of the elastic joint 1, a form formed of a single material, a form of a hollow structure, or a form of a composite material having a sponge-like substance at the center can be considered.
[0020]
3-5 shows another form of the elastic joint 1 of this invention. And FIG. 3 forms the water stop part 4 integrally formed in the leg part 5b of the plate part 5 in the square shape. Moreover, FIG. 4 forms the water stop part 4 in octagon shape. Furthermore, FIG. 5 forms the water stop part 4 in the circular shape which has a hollow part inside.
[0021]
According to the elastic joint 1 of the present invention having such a structure, the water stop portion 4 and the plate portion 5 are integrally formed as the elastic joint 1, and the joint portion by contact of each box culvert 2 generated by the deformation of the joint portion 3. 3 is a structure in which the elastic joint for preventing damage 3 and the pressure-resistant plate for preventing the inflow of earth and sand are integrated, so that the waterproof performance and deformation performance of the elastic joint 1 (to deform the joint) Followability) can be improved.
[0022]
Moreover, in the elastic joint 1 of this invention, since it forms in the cross-sectional substantially T shape from the main body 5a of the plate part 5, and the leg part 5b which has the water stop part 4, it is a junction part between each box culvert 2 3 can be easily set.
[0023]
【The invention's effect】
In the elastic joint of the present invention, the water stop portion and the plate portion are integrally formed as an elastic joint, and the elastic joint for preventing damage to the joint portion due to the contact of each box culvert caused by the deformation of the joint portion, inflow of earth and sand It has a structure in which a pressure-resistant plate that prevents the above is integrated.
[0024]
Therefore, the water stop performance of the elastic joint and the deformation performance of the elastic joint (followability to deformation of the joint portion) can be improved.
[0025]
Moreover, in the elastic joint of this invention, since it forms in the cross-section substantially T shape from the leg part which has the main body of a plate part, and a water stop part, the setting to the junction part between each box culvert is easy. It can be carried out.
[Brief description of the drawings]
FIG. 1 (a) shows an elastic joint of a box culvert according to the present invention, and is a schematic cross-sectional view taken along line AA of FIG. 2, and FIG. 1 (b) is an enlarged cross-sectional view of a portion B of FIG.
FIG. 2 is a schematic view showing a box culvert provided in the elastic joint of the present invention.
FIG. 3 is a schematic sectional view showing another embodiment of the elastic joint of the present invention.
FIG. 4 is a schematic sectional view showing another embodiment of the elastic joint of the present invention.
FIG. 5 is a schematic sectional view showing another embodiment of the elastic joint of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Elastic joint, 2 ... Box culvert, 3 ... Joint part, 4 ... Water stop part, 5 ... Plate part, 5a ... Main body, 5b ... Leg part, 6 ... PC tension material.

Claims (3)

軸方向に隣接して設置される複数個のボックスカルバートにおいて、PC緊張材で一体化してなる各ボックスカルバートの接合部に設けている弾性継手であり、
前記接合部に設けている弾性材の止水部と、各ボックスカルバートの外周面に前記接合部を覆うように設けている弾性材の土砂浸入阻止用のプレート部とを備えており、
前記プレート部は、ボックスカルバートの外周面に沿って配設されて前記接合部を覆っている板状の本体と、この本体から前記接合部内に延びる脚部とから断面略T字状に形成されていると共に、前記止水部は、その厚みを前記脚部の厚みの2倍以上にして、前記プレート部の脚部に一体形成していることを特徴とするボックスカルバートの弾性継手。
In a plurality of box culverts installed adjacent to each other in the axial direction, it is an elastic joint provided at the joint of each box culvert formed by integrating with a PC tension material ,
A water stop portion of the elastic material provided in the joint portion, and a plate portion for preventing sediment intrusion of the elastic material provided to cover the joint portion on the outer peripheral surface of each box culvert,
The plate portion is formed in a substantially T-shaped cross section from a plate-like main body disposed along the outer peripheral surface of the box culvert and covering the joint portion, and a leg portion extending from the main body into the joint portion. In addition, the water stop portion is formed integrally with the leg portion of the plate portion so that the thickness thereof is twice or more the thickness of the leg portion.
前記止水部は、その断面形状を円形状にしていることを特徴とする請求項1記載のボックスカルバートの弾性継手。The elastic joint for a box culvert according to claim 1, wherein the water stop portion has a circular cross-sectional shape . 前記止水部は、その断面形状を形状にしていることを特徴とする請求項1記載のボックスカルバートの弾性継手。The elastic joint for a box culvert according to claim 1, wherein the water stop portion has a square cross-sectional shape.
JP2002202233A 2002-07-11 2002-07-11 Box culvert elastic joint Expired - Fee Related JP3804942B2 (en)

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JP3804942B2 true JP3804942B2 (en) 2006-08-02

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KR102098106B1 (en) * 2019-07-12 2020-04-07 삼성엔지니어링 주식회사 Joint filler for precast concrete and concrete structure including the same
KR102298176B1 (en) * 2021-01-13 2021-09-07 전준모 Seismic box culvert with improved watertightness and airtightness

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