JP4395685B2 - Base plate manufacturing installation method - Google Patents

Base plate manufacturing installation method Download PDF

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Publication number
JP4395685B2
JP4395685B2 JP2000354524A JP2000354524A JP4395685B2 JP 4395685 B2 JP4395685 B2 JP 4395685B2 JP 2000354524 A JP2000354524 A JP 2000354524A JP 2000354524 A JP2000354524 A JP 2000354524A JP 4395685 B2 JP4395685 B2 JP 4395685B2
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arc
shaped flat
flat plate
base plate
plate
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JP2002156484A (en
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隆 平野
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IHI Corp
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IHI Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Description

【０００１】
【発明の属する技術分野】
本発明はベースプレート製作据付方法に関するものである。
【０００２】
【従来の技術】
図３は原子炉圧力容器支持構造の一例であり、この原子炉圧力容器は、胴部１下端に下部鏡板２を一体的に形成した圧力容器本体３と、該圧力容器本体３上端に装着される上部鏡板４と、下部鏡板２から下方へ延びるスカート部５とで構成されており、該スカート部５を、原子炉格納容器内に立設したペデスタル６上端にベースプレート７を介して載置し、ペデスタル６から上方へ垂直に突出し且つベースプレート７とスカート部５下端のフランジ８を貫通するボルト９により、圧力容器本体３をペデスタル６に原子炉遮蔽壁１０の内方に位置するように支持している。
【０００３】
従来、ベースプレート７の製作並びに据付は、図４に示すような手順で実施されている。
【０００４】
はじめに、製作すべきベースプレート７よりも内径及び外径が若干大きい環状平板１１を４分割したような形状の円弧状平板１２を、ベースプレート７の設計厚さｔに対して充分な削り代ｋを見込んだ素材１３から切り出す。
【０００５】
次いで、各円弧状平板１２の端面を平滑に整形し且つ当該箇所の上下両面側に開先加工を施したうえ、円弧状平板１２の開先加工箇所を溶接して環状平板１１を形成する。
【０００６】
また、環状平板１１の内外周両側面をベースプレート７の設計内径及び外径に応じて研削し、環状平板１１に上下へ貫通するボルト９挿通用の孔１４を周方向に等間隔に穿設した後、環状平板１１の上下両面を設計厚さｔに応じて研削し、ベースプレート７を形成する。
【０００７】
更に、ベースプレート７を据付現場へ搬送し、それぞれの孔１４にボルト９が挿通されるように、当該ベースプレート７を既に構築されているペデスタル６上に載置している。
【０００８】
このとき、ペデスタル６とベースプレート７との間に、高さ位置調整用のシムプレート（図示せず）を必要に応じて介装し、ベースプレート７の上面が水平を保つようにしている。
【０００９】
【発明が解決しようとする課題】
ベースプレート７は、外径が６〜９ｍ程度もある大型構造物であるので、製作工場から据付現場へのベースプレート７の搬送には、船舶や台船などの海上輸送手段を利用せざるを得ず、多大な輸送費を要していた。
【００１０】
本発明は上述した実情に鑑みてなしたもので、ベースプレートの製作及び据付にあたって据付精度を保持し且つ輸送費が軽減できるようにすることを目的としている。
【００１１】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１に記載のベースプレート製作据付方法では、環状平板を形成し得る複数の円弧状平板を素材から切り出し、各円弧状平板の端面を整え且つそれらの上下両面側に開先加工を施したうえ、円弧状平板の開先加工箇所を溶接して環状平板を形成させ、当該環状平板の内外周両側面を整え且つ円弧状平板のそれぞれに上下方向に貫通するボルト孔を穿設した後、隣接する円弧状平板の内外周両側面を拘束部材を介して相互に固定し、環状平板の上下両側面に研削加工を施して隣接する円弧状平板間の溶接層を取り除き、拘束部材による円弧状平板相互の固定を解除してこれら円弧状平板を据付現場へ搬送し、円弧状平板を予め構築したスラブ上に順次設置して環状のベースプレートを形成する。
【００１２】
本発明の請求項２に記載のベースプレート製作据付方法では、環状平板を形成し得る複数の円弧状平板を素材から切り出し、各円弧状平板の端面を整え且つそれらの上下両面側に開先加工を施したうえ、円弧状平板の開先加工箇所を溶接して環状平板を形成させ、当該環状平板の内外周両側面を整え且つ円弧状平板のそれぞれに上下方向に貫通するボルト孔を穿設した後、隣接する円弧状平板の内外周両側面を拘束部材を介して相互に固定し、環状平板の上下両側面に研削加工を施して隣接する円弧状平板間の溶接層を取り除き、拘束部材による円弧状平板相互の固定を解除してこれら円弧状平板を据付現場へ搬送し、円弧状平板を据付現場で接続して環状のベースプレートを形成し、該ベースプレートを予め構築したスラブ上に設置する。
【００１３】
これらに加えて、本発明の請求項３に記載のベースプレート製作据付方法では、円弧状平板の開先加工箇所を溶接して環状平板を形成させるのにあたり、相対する円弧状平板の間に調整板を介在させておく。
【００１４】
更に、本発明の請求項４に記載のベースプレート製作据付方法では、各円弧状平板の所定箇所に上下方向に延びる切欠部を設け、上方へ突出し且つ切欠部が摺動可能に嵌合するガイド部材をスラブに取り付けておく。
【００１５】
本発明の請求項１乃至請求項４に記載のベースプレート製作据付方法のいずれにおいても、スラブ上に載置すべきベースプレートを、それぞれ独立した複数の円弧状平板として据付現場へ搬送するようにし、搬送時の荷姿の縮小を図る。
【００１６】
また、ボルト挿通用の孔を穿設する前に、相互に溶接固着すべき円弧状平板の間に調整板を介在させて、スラブ上への載置にあたり円弧状平板の端部間に必要なクリアランスを確保する。
【００１７】
更に、円弧状平板をスラブ上に載置する際に、円弧状平板の切欠部をスラブに取り付けたガイド部材に嵌合させて、当該円弧状平板を案内する。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を、図示例とともに説明する。
【００１９】
図１は本発明のベースプレート製作据付方法の実施の形態の一例であり、図中、図３及び図４と同一の符号を付した部分は同一物を表わしている。
【００２０】
このベースプレート製作据付方法では、ペデスタル６上に据え付けるベースプレート７よりも内径及び外径が若干大きい環状平板１５を４分割したような形状の円弧状平板１６を、ベースプレート７の設計厚さｔに対して充分な削り代ｋを見込んだ素材１７から切り出す。
【００２１】
次いで、各円弧状平板１６の端面を平滑に整形し且つ当該箇所の上下両面側に開先加工を施したうえ、円弧状平板１６の開先加工箇所を溶接して環状平板１５を形成する。
【００２２】
このとき、相対する円弧状平板１６の端面間に、厚さ寸法が１〜２ｍｍ程度の調整板２１を介在させておく。
【００２３】
上記の開先加工は、円弧状平板１６を相互に溶接する際に、ベースプレート７の設計厚さｔに対応する部分が溶融せず且つ当該部分に溶可材が溶着しないように、削り代ｋ部分に対してのみ施工されている。
【００２４】
また、環状平板１５の内外周両側面をベースプレート７の設計内径及び外径に応じて研削し、環状平板１５に上下へ貫通するボルト９挿通用の孔１８を周方向に等間隔に穿設する。
【００２５】
次いで、隣接する円弧状平板１６端部の内外周両側面に、拘束部材１９，２０をボルト締結、あるいは仮付け溶接して、当該円弧状平板１６を相互に固定したうえ、環状平板１５の上下両面を設計厚さｔに応じて研削し、ベースプレート７を形成する。
【００２６】
拘束部材１９，２０の厚さ寸法は、ベースプレート７の設計厚さｔ以下に設定されており、上記の研削により、隣接する円弧状平板１６端部間の溶接層が取り除かれることになる。
【００２７】
更に、拘束部材１９，２０による円弧状平板１６の相互の連結を解除し、当該円弧状平板１６の端面間から調整板２１を取り外した後、これら円弧状平板１６をトレーラトラックなどの陸上輸送手段によって、製作工場から据付現場へ搬送する。
【００２８】
円弧状平板１６を据付現場へ搬送したならば、それぞれの孔１８にボルト９が挿通されるように、当該円弧状平板１６を既に構築されているペデスタル６上に順次載置して、環状のベースプレート７を形成する。
【００２９】
このとき、ペデスタル６と各円弧状平板１６との間に、高さ位置調整用のシムプレート（図示せず）を必要に応じて介装する。
【００３０】
また、環状平板１５にボルト９挿通用の孔１８を穿設する際に、隣接している円弧状平板１６の双方に跨がるように上下へ貫通する孔を穿設して、図２に示すような円弧状平板１６の端部に切欠部２２を設け、ペデスタル６に上方へ突出し且つ切欠部２２が摺動可能に嵌合するガイド部材２３を取り付け、ペデスタル６上に載置すべき円弧状平板１６を、ガイド部材２３で導くようにしてもよい。
【００３１】
この場合、円弧状平板１６をペデスタル６上に順次載置してベースプレート７（図１参照）を形成した後に、ガイド部材２３を取り外すか、ベースプレート７から上方へ突出しないようにガイド部材２３を切断して、ガイド部材２３と圧力容器本体３に付帯のフランジ８との干渉を回避する。
【００３２】
更に、先に述べた拘束部材１９，２０を利用し、据付現場で円弧状平板１６を接続することによりベースプレート７を形成したうえ、当該ベースプレート７をペデスタル６に載置するようにしてもよい。
【００３３】
このように、図１及び図２に示す本発明のベースプレート製作据付方法では、ペデスタル６上に載置すべきベースプレート７を、それぞれ独立した複数の円弧状平板１６として据付現場へ搬送するようにし、搬送時の荷姿の縮小を図るので、トレーラトラックなどの陸上輸送手段の利用が可能になり、従来に比べて輸送費を低減させることができる。
【００３４】
また、ボルト９挿通用の孔１８を穿設する前に、相互に溶接固着すべき円弧状平板１６の間に調整板２１を介在させて、ペデスタル６上への載置にあたり円弧状平板１６端部間に必要なクリアランスを確保するので、据付精度を保持しつつ、円弧状平板１６の端部が重なり合うことを回避できる。
【００３５】
更に、円弧状平板１６をペデスタル６上に載置するときに、円弧状平板１６の切欠部２２をペデスタル６に取り付けたガイド部材２３に嵌合させて、当該円弧状平板１６を案内するので、孔１８とボルト９の位置合わせを容易に且つ確実に行なうことができる。
【００３６】
なお、本発明のベースプレート製作据付方法は上述した実施の形態のみに限定されるものではなく、本発明の要旨を逸脱しない範囲において変更を加え得ることは勿論である。
【００３７】
【発明の効果】
以上述べたように本発明のベースプレート製作据付方法によれば、下記のような種々の優れた効果を奏し得る。
【００３８】
（１）スラブ上に載置すべきベースプレートを、複数の円弧状平板として据付現場へ搬送するようにし、搬送時の荷姿の縮小を図るので、トレーラトラックのような陸上輸送手段の利用が可能になり、従来に比べて輸送費を低減させることができる。
【００３９】
（２）また、ボルト挿通用の孔を穿設する前に、相互に溶接固着すべき円弧状平板の間に調整板を介在させて、スラブ上への載置にあたり円弧状平板端部間に必要なクリアランスを確保するので、据付精度を保持しつつ、円弧状平板の端部が重なり合うことを回避できる。
【００４０】
（３）更に、円弧状平板をスラブ上に載置するときに、円弧状平板の切欠部をスラブに取り付けたガイド部材に嵌合させて、当該円弧状平板を案内するので、孔とボルトの位置合わせを容易に且つ確実に行なうことができる。
【図面の簡単な説明】
【図１】本発明のベースプレート製作据付方法の実施の形態の一例の手順を示す概念図である。
【図２】円弧状平板に設ける切欠部とペデスタルに取り付けるガイド部材の関係を示す概念図である。
【図３】原子炉圧力容器支持構造の一例を示す概念図である。
【図４】従来のベースプレート製作据付け方法の一例の手順を示す概念図である。
【符号の説明】
６ ペデスタル（スラブ）
７ ベースプレート
１５ 環状平板
１６ 円弧状平板
１７ 素材
１８ 孔（ボルト孔）
１９ 拘束部材
２０ 拘束部材
２１ 調整板
２２ 切欠部
２３ ガイド部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing and installing a base plate.
[0002]
[Prior art]
FIG. 3 shows an example of a reactor pressure vessel support structure. This reactor pressure vessel is attached to a pressure vessel body 3 in which a lower end plate 2 is integrally formed at a lower end of a body 1 and an upper end of the pressure vessel body 3. The upper end plate 4 and the skirt portion 5 extending downward from the lower end plate 2 are mounted on the upper end of the pedestal 6 erected in the reactor containment vessel via the base plate 7. The pressure vessel main body 3 is supported by the pedestal 6 so as to be positioned inward of the reactor shielding wall 10 by a bolt 9 protruding vertically upward from the pedestal 6 and passing through the flange 8 at the lower end of the base plate 7 and the skirt portion 5. ing.
[0003]
Conventionally, the production and installation of the base plate 7 have been carried out according to the procedure shown in FIG.
[0004]
First, an arc-shaped flat plate 12 having a shape obtained by dividing an annular flat plate 11 having an inner diameter and an outer diameter slightly larger than the base plate 7 to be manufactured into four parts is anticipated with a sufficient cutting allowance k with respect to the design thickness t of the base plate 7. Cut out from the raw material 13.
[0005]
Next, the end surface of each arc-shaped flat plate 12 is shaped smoothly and groove processing is performed on both upper and lower surfaces of the portion, and the groove processing portion of the arc-shaped flat plate 12 is welded to form the annular flat plate 11.
[0006]
Further, both inner and outer peripheral side surfaces of the annular flat plate 11 are ground according to the designed inner diameter and outer diameter of the base plate 7, and holes 14 for inserting bolts 9 extending vertically through the annular flat plate 11 are formed at equal intervals in the circumferential direction. Thereafter, the upper and lower surfaces of the annular flat plate 11 are ground according to the design thickness t to form the base plate 7.
[0007]
Further, the base plate 7 is transported to the installation site, and the base plate 7 is placed on the already constructed pedestal 6 so that the bolts 9 are inserted into the respective holes 14.
[0008]
At this time, a shim plate (not shown) for height position adjustment is interposed between the pedestal 6 and the base plate 7 as necessary so that the upper surface of the base plate 7 is kept horizontal.
[0009]
[Problems to be solved by the invention]
Since the base plate 7 is a large structure having an outer diameter of about 6 to 9 m, it is unavoidable to use a marine transportation means such as a ship or a carrier to transport the base plate 7 from the manufacturing factory to the installation site. , It required a lot of transportation costs.
[0010]
The present invention has been made in view of the above-described circumstances, and an object thereof is to maintain installation accuracy and reduce transportation costs when manufacturing and installing a base plate.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, in the base plate manufacturing and installation method according to claim 1 of the present invention, a plurality of arc-shaped flat plates that can form an annular flat plate are cut out from the material, the end surfaces of the respective arc-shaped flat plates are adjusted, and the upper and lower sides thereof Groove processing is performed on both sides, and the grooved portions of the arc-shaped flat plate are welded to form an annular flat plate, and both the inner and outer peripheral side surfaces of the circular flat plate are arranged and penetrated vertically in each of the arc-shaped flat plates. After drilling bolt holes, the inner and outer peripheral side surfaces of adjacent arc-shaped flat plates are fixed to each other via a restraining member, and the upper and lower side surfaces of the annular flat plate are ground and welded between adjacent arc-shaped flat plates. The layers are removed, the arc-shaped flat plates are fixed to each other by the restraining members, the arc-shaped flat plates are transported to the installation site, and the arc-shaped flat plates are sequentially installed on a pre-constructed slab to form an annular base plate.
[0012]
In the base plate manufacturing and installation method according to claim 2 of the present invention, a plurality of arc-shaped flat plates that can form an annular flat plate are cut out from the material, the end surfaces of the respective arc-shaped flat plates are trimmed, and groove processing is performed on both upper and lower sides thereof. In addition, a grooved portion of the arc-shaped flat plate was welded to form an annular flat plate, both inner and outer peripheral side surfaces of the annular flat plate were adjusted, and bolt holes penetrating in the vertical direction were formed in each of the arc-shaped flat plates. Then, the inner and outer peripheral side surfaces of the adjacent arc-shaped flat plates are fixed to each other via a restraining member, and the upper and lower side surfaces of the annular flat plate are ground to remove the weld layer between the adjacent arc-shaped flat plates. The arc-shaped flat plates are released from each other and transported to the installation site. The arc-shaped flat plates are connected at the installation site to form an annular base plate, and the base plate is installed on a pre-constructed slab.
[0013]
In addition to these, in the base plate manufacturing and installation method according to claim 3 of the present invention, the welded portion of the arc-shaped flat plate is welded to form the annular flat plate. Intervene.
[0014]
Furthermore, in the base plate manufacturing and installation method according to claim 4 of the present invention, a guide member is provided with a notch extending in the vertical direction at a predetermined position of each arc-shaped flat plate, protruding upward and slidably fitted into the notch. Is attached to the slab.
[0015]
In any of the base plate manufacturing and installation methods according to claims 1 to 4 of the present invention, the base plate to be placed on the slab is transported to the installation site as a plurality of independent arc-shaped flat plates, and transported. Reduce the packaging of the time.
[0016]
In addition, before drilling holes for bolt insertion, an adjustment plate is interposed between the arc-shaped flat plates to be welded to each other, and is necessary between the ends of the arc-shaped flat plate for mounting on the slab. Ensure clearance.
[0017]
Further, when the arc-shaped flat plate is placed on the slab, the notch of the arc-shaped flat plate is fitted into a guide member attached to the slab to guide the arc-shaped flat plate.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
FIG. 1 is an example of an embodiment of a method for manufacturing and installing a base plate of the present invention. In the figure, the same reference numerals as those in FIGS. 3 and 4 denote the same parts.
[0020]
In this base plate manufacturing and installation method, an arc-shaped flat plate 16 having a shape obtained by dividing an annular flat plate 15 having a slightly larger inner diameter and outer diameter than the base plate 7 to be installed on the pedestal 6 into four parts is formed with respect to the design thickness t of the base plate 7. Cut out from the material 17 with sufficient cutting allowance k.
[0021]
Next, the end surface of each arc-shaped flat plate 16 is shaped smoothly and groove processing is performed on the upper and lower surfaces of the portion, and the groove processing portion of the arc-shaped flat plate 16 is welded to form the annular flat plate 15.
[0022]
At this time, an adjusting plate 21 having a thickness of about 1 to 2 mm is interposed between the end surfaces of the arcuate flat plates 16 facing each other.
[0023]
In the above groove processing, when the arc-shaped flat plates 16 are welded to each other, the machining allowance k is set so that the portion corresponding to the design thickness t of the base plate 7 does not melt and the meltable material does not weld to the portion. It is applied only to the part.
[0024]
Further, both inner and outer peripheral side surfaces of the annular flat plate 15 are ground according to the designed inner diameter and outer diameter of the base plate 7, and holes 18 for inserting bolts 9 penetrating up and down in the annular flat plate 15 are formed at equal intervals in the circumferential direction. .
[0025]
Next, the constraining members 19 and 20 are bolted or tack welded to both inner and outer peripheral side surfaces of the end of the adjacent arc-shaped flat plate 16 to fix the arc-shaped flat plate 16 to each other and Both surfaces are ground according to the design thickness t to form the base plate 7.
[0026]
The thickness dimension of the restraining members 19 and 20 is set to be equal to or less than the design thickness t of the base plate 7, and the above-described grinding removes the weld layer between the ends of the adjacent arc-shaped flat plates 16.
[0027]
Furthermore, after the mutual connection of the arc-shaped flat plate 16 by the restraining members 19 and 20 is released and the adjusting plate 21 is removed from between the end faces of the arc-shaped flat plate 16, the arc-shaped flat plate 16 is used as a land transportation means such as a trailer truck. To transport from the production factory to the installation site.
[0028]
When the arc-shaped flat plate 16 is transported to the installation site, the arc-shaped flat plate 16 is sequentially placed on the already constructed pedestal 6 so that the bolts 9 are inserted into the respective holes 18, and an annular shape is obtained. Base plate 7 is formed.
[0029]
At this time, a shim plate (not shown) for height position adjustment is interposed between the pedestal 6 and each arc-shaped flat plate 16 as necessary.
[0030]
Further, when the hole 18 for inserting the bolt 9 is drilled in the annular flat plate 15, a hole penetrating vertically is formed so as to straddle both of the adjacent arc-shaped flat plates 16, and FIG. The circular plate 16 to be placed on the pedestal 6 is provided with a notch 22 at the end of the arc-shaped flat plate 16 as shown, a guide member 23 protruding upward on the pedestal 6 and slidably fitted into the notch 22 is attached. The arcuate flat plate 16 may be guided by the guide member 23.
[0031]
In this case, after the arc-shaped flat plate 16 is sequentially placed on the pedestal 6 to form the base plate 7 (see FIG. 1), the guide member 23 is removed or the guide member 23 is cut so as not to protrude upward from the base plate 7. Thus, interference between the guide member 23 and the flange 8 attached to the pressure vessel main body 3 is avoided.
[0032]
Further, the base plate 7 may be formed by connecting the arc-shaped flat plate 16 at the installation site using the restraining members 19 and 20 described above, and the base plate 7 may be placed on the pedestal 6.
[0033]
Thus, in the base plate production and installation method of the present invention shown in FIGS. 1 and 2, the base plate 7 to be placed on the pedestal 6 is transported to the installation site as a plurality of independent arcuate flat plates 16, Since the package form during transportation is reduced, land transportation means such as a trailer truck can be used, and transportation costs can be reduced as compared with the prior art.
[0034]
Further, before the hole 18 for inserting the bolt 9 is drilled, an adjustment plate 21 is interposed between the arc-shaped flat plates 16 to be welded and fixed to each other, so that the end of the arc-shaped flat plate 16 is placed on the pedestal 6. Since the necessary clearance is ensured between the portions, it is possible to avoid the end portions of the arc-shaped flat plate 16 from overlapping while maintaining the installation accuracy.
[0035]
Further, when the arc-shaped flat plate 16 is placed on the pedestal 6, the notch 22 of the arc-shaped flat plate 16 is fitted into the guide member 23 attached to the pedestal 6 to guide the arc-shaped flat plate 16. The holes 18 and the bolts 9 can be easily and reliably aligned.
[0036]
It should be noted that the base plate manufacturing and installation method of the present invention is not limited to the above-described embodiment, and it goes without saying that modifications can be made without departing from the scope of the present invention.
[0037]
【The invention's effect】
As described above, according to the base plate manufacturing and installation method of the present invention, the following various excellent effects can be obtained.
[0038]
(1) Since the base plate to be placed on the slab is transported to the installation site as a plurality of arc-shaped flat plates, and the package shape during transportation is reduced, land transportation means such as trailer trucks can be used. Therefore, the transportation cost can be reduced as compared with the conventional case.
[0039]
(2) Further, before the bolt insertion hole is drilled, an adjustment plate is interposed between the arc-shaped flat plates to be welded and fixed to each other, and between the ends of the arc-shaped flat plate when placing on the slab. Since the necessary clearance is ensured, it is possible to avoid overlapping the ends of the arc-shaped flat plates while maintaining the installation accuracy.
[0040]
(3) Further, when the arc-shaped flat plate is placed on the slab, the notch of the arc-shaped flat plate is fitted to the guide member attached to the slab to guide the arc-shaped flat plate. Positioning can be performed easily and reliably.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a procedure of an example of an embodiment of a base plate manufacturing and installation method of the present invention.
FIG. 2 is a conceptual diagram showing a relationship between a notch provided in an arc-shaped flat plate and a guide member attached to a pedestal.
FIG. 3 is a conceptual diagram showing an example of a reactor pressure vessel support structure.
FIG. 4 is a conceptual diagram showing a procedure of an example of a conventional base plate manufacturing and installation method.
[Explanation of symbols]
6 Pedestal (Slab)
7 base plate 15 annular flat plate 16 arc-shaped flat plate 17 material 18 hole (bolt hole)
19 Constraint Member 20 Constraint Member 21 Adjustment Plate 22 Notch 23 Guide Member

Claims (4)

環状平板を形成し得る複数の円弧状平板を素材から切り出し、各円弧状平板の端面を整え且つそれらの上下両面側に開先加工を施したうえ、円弧状平板の開先加工箇所を溶接して環状平板を形成させ、当該環状平板の内外周両側面を整え且つ円弧状平板のそれぞれに上下方向に貫通するボルト孔を穿設した後、隣接する円弧状平板の内外周両側面を拘束部材を介して相互に固定し、環状平板の上下両側面に研削加工を施して隣接する円弧状平板間の溶接層を取り除き、拘束部材による円弧状平板相互の固定を解除してこれら円弧状平板を据付現場へ搬送し、円弧状平板を予め構築したスラブ上に順次設置して環状のベースプレートを形成することを特徴とするベースプレート製作据付方法。A plurality of arc-shaped flat plates that can form an annular flat plate are cut out from the material, the end surfaces of each arc-shaped flat plate are trimmed, and groove processing is performed on both the upper and lower sides, and the groove processing portions of the arc-shaped flat plate are welded. An annular flat plate is formed, both inner and outer peripheral side surfaces of the annular flat plate are trimmed, and bolt holes penetrating in the vertical direction are formed in each of the arc-shaped flat plates. Are fixed to each other, and the upper and lower side surfaces of the annular flat plate are ground to remove the weld layer between the adjacent arc-shaped flat plates. A base plate manufacturing and installation method characterized in that an annular base plate is formed by transporting to an installation site and sequentially installing arc-shaped flat plates on a pre-constructed slab. 環状平板を形成し得る複数の円弧状平板を素材から切り出し、各円弧状平板の端面を整え且つそれらの上下両面側に開先加工を施したうえ、円弧状平板の開先加工箇所を溶接して環状平板を形成させ、当該環状平板の内外周両側面を整え且つ円弧状平板のそれぞれに上下方向に貫通するボルト孔を穿設した後、隣接する円弧状平板の内外周両側面を拘束部材を介して相互に固定し、環状平板の上下両側面に研削加工を施して隣接する円弧状平板間の溶接層を取り除き、拘束部材による円弧状平板相互の固定を解除してこれら円弧状平板を据付現場へ搬送し、円弧状平板を据付現場で接続して環状のベースプレートを形成し、該ベースプレートを予め構築したスラブ上に設置することを特徴とするベースプレート製作据付方法。A plurality of arc-shaped flat plates that can form an annular flat plate are cut out from the material, the end surfaces of each arc-shaped flat plate are trimmed, and groove processing is performed on both the upper and lower sides, and the groove processing portions of the arc-shaped flat plate are welded. An annular flat plate is formed, both inner and outer peripheral side surfaces of the annular flat plate are trimmed, and bolt holes penetrating in the vertical direction are formed in each of the arc-shaped flat plates. Are fixed to each other, and the upper and lower side surfaces of the annular flat plate are ground to remove the weld layer between the adjacent arc-shaped flat plates. A base plate manufacturing and installation method characterized by transporting to an installation site, connecting arc-shaped flat plates at the installation site to form an annular base plate, and installing the base plate on a pre-constructed slab. 円弧状平板の開先加工箇所を溶接して環状平板を形成させるのにあたり、相対する円弧状平板の間に調整板を介在させておく請求項１あるいは請求項２のいずれかに記載のベースプレート製作据付方法。3. The base plate manufacturing method according to claim 1, wherein an adjustment plate is interposed between the opposing arc-shaped flat plates when the grooved portions of the arc-shaped flat plate are welded to form the annular flat plate. Installation method. 各円弧状平板の所定箇所に上下方向に延びる切欠部を設け、上方へ突出し且つ切欠部が摺動可能に嵌合するガイド部材をスラブに取り付けておく請求項１乃至請求項３のいずれかに記載のベースプレート製作据付方法。4. A notched portion extending in the vertical direction is provided at a predetermined position of each arc-shaped flat plate, and a guide member that protrudes upward and is slidably fitted to the notched portion is attached to the slab. The base plate manufacturing and installation method described.
JP2000354524A 2000-11-21 2000-11-21 Base plate manufacturing installation method Expired - Fee Related JP4395685B2 (en)

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