JPS5882879A - Supporting structure of tank made of prestressed concrete - Google Patents
Supporting structure of tank made of prestressed concreteInfo
- Publication number
- JPS5882879A JPS5882879A JP56180976A JP18097681A JPS5882879A JP S5882879 A JPS5882879 A JP S5882879A JP 56180976 A JP56180976 A JP 56180976A JP 18097681 A JP18097681 A JP 18097681A JP S5882879 A JPS5882879 A JP S5882879A
- Authority
- JP
- Japan
- Prior art keywords
- side wall
- bottom plate
- sheath
- prestressed concrete
- steel rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011513 prestressed concrete Substances 0.000 title claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、プレストレストコンクリート製タンクの支承
構造に関し、特に、ひび割れを発生しに〈〈シ、且つ安
定性が高く、材料的にも経済的にした支承構造に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a tank made of prestressed concrete, and particularly to a support structure that is resistant to cracking, highly stable, and economical in terms of materials.
従来、この種の支承構造の一つは第１図に示すように、
プレストレストコンクリート製タンクを構成する側壁ｌ
、及び側壁ｌと一体の底板２とからなっている。。側壁
ｌ及び底板２内部には、両者に跨ってＰＣ鋼棒３が埋設
されている。尚、鋼棒３周囲には、通常、コンクリート
との接触面積を大にするための図示しない金属線が巻き
付けられている。Conventionally, one of this type of support structure is shown in Fig. 1.
Side wall composing a prestressed concrete tank
, and a bottom plate 2 integral with the side wall l. . A PC steel rod 3 is buried inside the side wall l and the bottom plate 2, spanning both. Note that a metal wire (not shown) is usually wrapped around the steel rod 3 in order to increase the contact area with concrete.
との支承構造は、いわゆる固定構造であって、側壁ｌと
底板２を一体として打設し、諸荷重による側壁ｌの変位
を全て拘束する構成としたもので、小容量のタンクに用
いられることが多い。The supporting structure is a so-called fixed structure, in which the side wall 1 and the bottom plate 2 are cast as one unit, and is configured to restrain all displacement of the side wall 1 due to various loads, and is used for small-capacity tanks. There are many.
しかし、この場合、側壁コンクリート打設時に底板２の
拘束を受け、乾燥収縮等により、下端付近にクラックが
発生し易い。また、完成後の諸荷重に対しても側壁下部
の曲げ応力が極端に大きくなり、不経済な断面となって
いる。However, in this case, cracks are likely to occur near the lower end due to the restraint of the bottom plate 2 during sidewall concrete pouring and drying shrinkage. Furthermore, the bending stress at the lower part of the side wall becomes extremely large under various loads after completion, resulting in an uneconomical cross section.
また、従来の第二のものは第２図に示すようにヒンジ構
造であって、側壁ｌと底板２はう・り−・！ッド４等を
介して縁−を切り、鋼棒３で連結して、側壁ｌの半径方
向・回転変位のみを許す構成で、比較的大容量のタンク
に用いられている。Moreover, the second conventional one has a hinge structure as shown in FIG. 2, and the side wall l and the bottom plate 2 are bent...! It has a configuration in which the edges are cut through rods 4, etc., and connected by steel rods 3, allowing only radial and rotational displacement of the side wall l, and is used in relatively large-capacity tanks.
しかし、ヒンジ構造の場合、固定構造に比べて曲げ応力
は楽になるが、地震時荷重等、非軸対称荷重作用時にお
いて、側壁下端の拘束の影響は依然として残る問題があ
る。However, in the case of a hinge structure, although bending stress is easier than in a fixed structure, there is still the problem that the effect of restraint on the lower end of the side wall remains when a non-axisymmetric load is applied, such as an earthquake load.
さらに、従来の第三の支承構造は、第３図に示すように
フリー構造であって、側壁ｌと底板２は□
設計上考えられる変位を吸収し得るう・ぐ〜・やラド４
等を介して縁が切られており、側壁ｌは全ての変位が許
される構成で、地震の少ない海外で実施例がある。Furthermore, the conventional third support structure is a free structure as shown in FIG.
The edge is cut through the edge, and the side wall l is configured to allow any displacement, and there are examples in overseas countries where earthquakes are rare.
しかし、側壁ｌの変位を許してい不ので部材応力は小さ
く経済的となるが、地震時等にタンク躯体が不安定とな
る問題がある。However, since the side wall l is not allowed to displace, the member stress is small and it is economical, but there is a problem that the tank body becomes unstable in the event of an earthquake or the like.
本発明は、これらの問題点に基づいてなされたもので、
クランクが発生しにくく、また非軸対称荷重の作用に対
しても安定性が高く、更に材料面で経済的になる支承構
造を提供することを目的とする。The present invention was made based on these problems, and
It is an object of the present invention to provide a support structure that is less prone to cranking, has high stability against the action of non-axisymmetric loads, and is economical in terms of materials.
本発明の支承構造においては、リンクの機能に支障がな
い限り、側壁の変位を許容した方が部材断面は経済的に
なることを考慮し、側壁と底板を別体にしである。また
、地震時のような非軸対称荷重作用時に、どのような支
承条件が最も合理的かを実際の計算によって確認したと
ころ、側壁をその半径方向にフリー（摺動変位可能）と
し、且つ円周方向は拘束するのが良いとの結論を得、こ
の機能を果すために、側壁荷重を摺動シューにより負担
させた上で、略長方形断面のサヤ管とこの中に入る鋼棒
とで側壁及び底板を連結しである。In the support structure of the present invention, the side wall and the bottom plate are made separate, considering that allowing displacement of the side wall will make the cross section of the member more economical, as long as the function of the link is not affected. In addition, when we confirmed through actual calculations what kind of support conditions are the most rational when a non-axisymmetric load is applied, such as during an earthquake, we found that the side wall is free in its radial direction (sliding displacement is possible), and It was concluded that it is better to restrain the circumferential direction, and in order to achieve this function, the side wall load is borne by a sliding shoe, and the side wall is constructed using a sheath pipe with a substantially rectangular cross section and a steel rod inserted inside it. And the bottom plate is connected.
以下、第４図〜第６図比示す一実施例により本発明を説
明する。The present invention will be explained below with reference to an embodiment shown in FIGS. 4 to 6.
これらの図において、本発明にょる支承構造はプレスト
レストコンクリート製タンクを構成する略円筒形の側壁
１１、及び該側壁１１とは別体で側壁１１を載置支持す
る底板１２を備えている。In these figures, the support structure according to the present invention includes a substantially cylindrical side wall 11 constituting a prestressed concrete tank, and a bottom plate 12 that is separate from the side wall 11 and supports the side wall 11.
底板１２の側壁載置面および側壁１１の下端面には、相
対応する多数組の摺動シュー１３．１４が夫々等間隔毎
に接着等によって固着されている。A large number of sets of corresponding sliding shoes 13 and 14 are fixed to the side wall mounting surface of the bottom plate 12 and the lower end surface of the side wall 11 at regular intervals by adhesive or the like.
摺動シュー１３．１４は、四ふっ化樹脂等の摩擦低減材
料よシなシ、側壁１１と底板１２の相対移動を可能にす
るもので、少なくとも一方の摺動シュー１３又は１４が
あれば足Ｑる。The sliding shoes 13 and 14 are made of a friction-reducing material such as polytetrafluorocarbon resin and enable relative movement between the side wall 11 and the bottom plate 12.If at least one of the sliding shoes 13 or 14 is present, the foot Qru.
また、前記側壁１１の下端部には、摺動シュー１４の間
において、複数の上部サヤ管１５が埋設され、一方、上
部サヤ管１５に対応する位賀で底板１２には複数の下部
サヤ管１６が埋設されている。Further, a plurality of upper sheath pipes 15 are buried in the lower end of the side wall 11 between the sliding shoes 14, and on the other hand, a plurality of lower sheath pipes are disposed on the bottom plate 12 at positions corresponding to the upper sheath pipes 15. 16 are buried.
これらの対応する上部及び下部サヤ管１５．１６の内部
の各々に跨って、鋼棒１７が挿通され、該鋼棒１７は上
部サヤ管１５より上方に突出した部分が側壁１１中に埋
設固定され、且つ下部サヤ管１６より下方に突出した部
分が底板１２中に埋設固定されている。尚、鋼棒１７の
側壁１１及び底板１２に埋設された部分には、コンクリ
ートとの接触面積を大にするだめのスパイラル状に金属
線１８が巻き付けられ、これらは押え板１９およびナツ
ト２０等により鋼棒１７に固定されている。A steel rod 17 is inserted across each of the interiors of the corresponding upper and lower sheath tubes 15 and 16, and the portion of the steel rod 17 that protrudes upward from the upper sheath tube 15 is buried and fixed in the side wall 11. , and a portion protruding downward from the lower sheath tube 16 is embedded and fixed in the bottom plate 12. Incidentally, a metal wire 18 is wound around the part of the steel rod 17 buried in the side wall 11 and the bottom plate 12 in a spiral shape to increase the contact area with the concrete, and these are held by a holding plate 19, a nut 20, etc. It is fixed to a steel rod 17.
また、上部及び下部サヤ管１５．１６は、夫々鋼棒１７
を前記側壁１１０半径方向のみに相対移動させるよう、
断面形状が夫々側壁１１の半径方向に延びる長孔２１を
有する構造となっている。In addition, the upper and lower sheath pipes 15 and 16 are each made of steel rods 17.
to move relative to the side wall 110 only in the radial direction,
Each side wall 11 has a cross-sectional shape with a long hole 21 extending in the radial direction of the side wall 11 .
長孔２．１は略長方形であって、第５図のように全体と
して放射状に配列され、幅方向寸法は鋼棒１７の外径と
ほぼ一致されている。なお、鋼棒１７は、上部及び下部
サヤ管１５．１６内で側壁１１の変形を妨げない自由長
を有している。The elongated holes 2.1 are approximately rectangular and are arranged radially as a whole as shown in FIG. Note that the steel rod 17 has a free length that does not hinder the deformation of the side wall 11 within the upper and lower sheath tubes 15 and 16.
また、側壁１１下端部内側と底板１２表面とには、内容
物の漏洩を防ぐ可撓性ンール鋼板２４の両端が夫々固着
されている。更に、底板１２外周の隆起部２２の内側に
は、側壁１１下端部の外側を受けるゴムノヤツｒ２３が
固着されている。Further, both ends of flexible steel plates 24 are fixed to the inner side of the lower end of the side wall 11 and the surface of the bottom plate 12, respectively, to prevent leakage of contents. Further, a rubber bushing r23 for receiving the outside of the lower end of the side wall 11 is fixed to the inside of the raised portion 22 on the outer periphery of the bottom plate 12.
上記のように構成された支承構造においては、地震等に
より非軸対称荷重を受けた場合、側壁１１は楕円形に変
形し、その時の短軸と長軸の方向は条件に応じて種々変
化する。In the support structure configured as described above, when a non-axisymmetric load is applied due to an earthquake or the like, the side wall 11 deforms into an elliptical shape, and the directions of the short axis and long axis at that time change variously depending on the conditions. .
また、側壁１１は半径方向の変位を許されているため、
乾燥収縮やクリープ、内容物による軸対称荷重によって
、側壁１１下部に過大な応力が生じることがなく、ひび
割れも発生しない。Moreover, since the side wall 11 is allowed to be displaced in the radial direction,
Excessive stress is not generated in the lower part of the side wall 11 due to drying shrinkage, creep, or axisymmetric load due to the contents, and no cracks are generated.
また、地震時には、側壁１１及び内容物の慣性力を合理
的に支え、側壁ｉｉ下端部に大きな力が集中することな
く、タンク躯体の部材断面、使用材料等が経済的になる
などの利点を有する。In addition, in the event of an earthquake, the inertia of the side wall 11 and contents can be rationally supported, large forces will not be concentrated on the lower end of the side wall ii, and the cross section of the tank body and the materials used can be made more economical. have
従って、本発明によると、ひび割れを発生しにくくシ、
安定性が高く且つ経済的な支承構造が得られる。Therefore, according to the present invention, it is possible to reduce the occurrence of cracks.
A highly stable and economical support structure can be obtained.
第１図は、従来のプレストレストコンクリート製タンク
の支承構造の一例の要部断面図、第２図は従来の他の例
の要部断面図、第３図は従来の更に他の例の要部断面図
、第４図は本発明の一実施例に係るプレストレストコン
クリート製タンクの支承構造の要部縦断面図、第５図は
第４図の側壁のｌ／４底面図、第６図は第４図の細部詳
細説明図である。
１１・・側壁 １２・・・底板１３．１４−・
・摺動シュー １５・・上部サヤ管１６・・・下部サヤ
管 １７・・・鋼棒２１・・長孔
特許出願人 三井建設株式会社
手続補正書
昭和５８年２月２日
特許庁長官 若 杉 和 夫 殿
１、事例の表示 特願昭５６−１８０９７６号２、
発明の名称 プレストレストコンクリート製タンク
の支承構造
３、補正をする者
事件との関係 特許出願人
東京都 千代田区 岩本町 ３丁目１０１１号三 月
建 設 株式会社
代表取締役社長 町 １）農 冶
４、代理人
東京都港区新１１丁目１８１１９号キムラヤ大塚ビル６
階７、補正の内容
１、特許請求の範囲を別紙のとおり補正します。
２、明細書第５頁第９行目の「四ふつ化樹脂等の」を「
少くとも表面が四ふつ化樹脂等の」と補正します。
８、添付書類の目録
１、補正特許請求の範囲 １通
以 上
特許請求の範囲
プレストレストコンクリ−１〜製タンクを構成する略円
筒形の側壁、及び該側壁とは別体で該側壁を載置支持す
る底板と、該底板の載置面及び側壁の下端面の少なくと
も一方に固着され、該側壁と底板の相対移動を可能にす
る少くとも表面が摩擦低減材料よりなる摺動シコーと、
前記側壁の下端部に埋設された複数の上部サヤ管と、該
上部サヤ管に対応する位置で前記底板に埋設された複数
の下部サヤ管と、該対応（る上部及び下部サヤ管内部の
各々に跨って設けられ、且つ上部サヤ管より上方に突出
した部分が前記側壁中に埋設固定されると共に、下部サ
ヤ管より下方に突出した部分が前記底板中に埋設固定さ
れた鋼棒とを具備し、前記上部及び下部サヤ管は、夫々
前記鋼棒を前記側壁の半径方向のみに相対移動させるよ
う、断面形状が夫々前記側壁の半径方向に延びる長孔を
有していることを特徴とするプレストレストコンクリー
ト製タンクの□支承構造。Fig. 1 is a cross-sectional view of a main part of an example of a conventional prestressed concrete tank support structure, Fig. 2 is a cross-sectional view of a main part of another conventional example, and Fig. 3 is a main part of yet another conventional example. 4 is a vertical sectional view of the main part of the support structure of a prestressed concrete tank according to an embodiment of the present invention, FIG. 5 is a 1/4 bottom view of the side wall of FIG. 4, and FIG. FIG. 4 is a detailed explanatory diagram of the details of FIG. 4; 11...Side wall 12...Bottom plate 13.14-...
- Sliding shoe 15... Upper sheath pipe 16... Lower sheath pipe 17... Steel rod 21... Long hole patent applicant Mitsui Construction Co., Ltd. Procedural amendment February 2, 1980 Commissioner of the Patent Office Wakasugi Mr. Kazuo 1, Indication of case study, Patent Application No. 180976-1982 2,
Title of the invention: Prestressed concrete tank support structure 3; Relationship with the amended case Patent applicant: No. 1011, 3-chome, Iwamoto-cho, Chiyoda-ku, Tokyo March
Construction Representative Director and President Town Co., Ltd. 1) Noji 4, agent Kimuraya Otsuka Building 6, 18119 Shin 11-chome, Minato-ku, Tokyo
Floor 7, Contents of Amendment 1, the scope of patent claims will be amended as shown in the attached sheet. 2. In the specification, page 5, line 9, “tetrafluoride resin, etc.” is replaced with “
At least the surface is made of tetrafluorinated resin, etc.” 8. List of Attached Documents 1 Amended Claims 1 or more Claims A substantially cylindrical side wall constituting a tank made of prestressed concrete 1, and the side wall is placed separately from the side wall. A supporting bottom plate, and a sliding sheet whose at least the surface is made of a friction-reducing material, which is fixed to at least one of the mounting surface of the bottom plate and the lower end surface of the side wall, and which enables relative movement between the side wall and the bottom plate.
A plurality of upper sheath tubes buried in the lower end of the side wall, a plurality of lower sheath tubes buried in the bottom plate at positions corresponding to the upper sheath tubes, and each of the corresponding upper and lower sheath tubes. and a steel rod that is provided astride the upper sheath tube, and has a portion that protrudes upward from the upper sheath tube embedded and fixed in the side wall, and a portion that projects downward from the lower sheath tube that is embedded and fixed in the bottom plate. The upper and lower sheath tubes each have an elongated hole whose cross-sectional shape extends in the radial direction of the side wall so that the steel rod can be moved relative only in the radial direction of the side wall. □Support structure of prestressed concrete tank.
Claims (1)
形、の側壁、及び該側壁とは別体で該側壁を載置支持す
る底板と、該底板の載置面及び側壁の下端面の少なくと
も一方に固着、され、該側壁と底板の相対移動を可能に
する摩擦低減材料よりなる摺動シューと、前記側壁の下
端部に埋設された複数の上部サヤ管と、該上部サヤ管に
対応する位置で前記底板に埋設された複数の下部サヤ管
と、該対応する上部及び下部サヤ管内部の各々に跨って
設けられ、且つ上部サヤ管よシ上方に突出した部分が前
記側壁中に埋設固定されると共に、下部サヤ管より下方
に突出した部分が前記底板中に埋設固定された鋼棒とを
具備し、前記上部及び下部サヤ管は、夫々前記鋼棒を前
記側壁の半径方向のみに相対移動させるよう、断面形状
が夫々前記側壁の半径方向に延びる長孔を有しているこ
とを特徴トスるプレストレストコンクリート製タンクの
支承構造。A substantially cylindrical side wall constituting a prestressed concrete tank; a bottom plate that is placed and supports the side wall separately from the side wall; , a sliding shoe made of a friction-reducing material that enables relative movement between the side wall and the bottom plate, a plurality of upper sheath tubes embedded in the lower end of the side wall, and a sliding shoe attached to the bottom plate at a position corresponding to the upper sheath tube. The part is provided to straddle the plurality of buried lower sheath pipes and the insides of the corresponding upper and lower sheath pipes, and a portion protruding upward from the upper sheath pipe is buried and fixed in the side wall, and the lower part A portion of the sheath tube protruding downward includes a steel rod embedded and fixed in the bottom plate, and each of the upper and lower sheath tubes has a cross section such that the steel rod is moved only in the radial direction of the side wall. A support structure for a tank made of prestressed concrete, characterized in that the shape has elongated holes extending in the radial direction of the side walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56180976A JPS5882879A (en) | 1981-11-13 | 1981-11-13 | Supporting structure of tank made of prestressed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56180976A JPS5882879A (en) | 1981-11-13 | 1981-11-13 | Supporting structure of tank made of prestressed concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5882879A true JPS5882879A (en) | 1983-05-18 |
Family
ID=16092564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56180976A Pending JPS5882879A (en) | 1981-11-13 | 1981-11-13 | Supporting structure of tank made of prestressed concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5882879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61215862A (en) * | 1984-10-26 | 1986-09-25 | バウアカデミ−・デル・ドイツチエン・デモクラテイシエン・レプブリツク | Base structure in thick pressure vessel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5614894B2 (en) * | 1975-11-12 | 1981-04-07 |
-
1981
- 1981-11-13 JP JP56180976A patent/JPS5882879A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5614894B2 (en) * | 1975-11-12 | 1981-04-07 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61215862A (en) * | 1984-10-26 | 1986-09-25 | バウアカデミ−・デル・ドイツチエン・デモクラテイシエン・レプブリツク | Base structure in thick pressure vessel |
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