JP2012121036A - Sampling and repairing method - Google Patents

Sampling and repairing method Download PDF

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JP2012121036A
JP2012121036A JP2010272342A JP2010272342A JP2012121036A JP 2012121036 A JP2012121036 A JP 2012121036A JP 2010272342 A JP2010272342 A JP 2010272342A JP 2010272342 A JP2010272342 A JP 2010272342A JP 2012121036 A JP2012121036 A JP 2012121036A
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steel surface
sampling
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JP5621561B2 (en
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Kenji Hirano
賢治 平野
Hisanori Kanehiro
尚典 兼広
Hiroyuki Aihara
広幸 藍原
Daisuke Yagi
大輔 八木
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IHI Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a sampling and repairing method capable of suppressing chips from entering a space on the rear surface side of a steel surface, and capable of collecting and repairing a sample with ease.SOLUTION: The sampling and repairing method includes a sampling step and a repairing step. In the sampling step, a plurality of non-through holes 3 that extend from a front surface side of a steel surface 1 to a rear surface side thereof are formed at the position on the outline of a sample 1a. The plurality of non-through holes 3 are so cut as to be connected along the outline of the sample 1a. An outer peripheral groove 4 is formed on the periphery of the sample 1a. The bottom part of the outer peripheral groove 4 is cut from the front surface side of the steel surface 1 to the rear surface side thereof. The sample 1a is cut out of the steel surface 1 for collecting. Then, in the repairing step, a cover plate is arranged on the cut-out of the steel surface 1. The cover plate is welded to the steel surface 1 for fixing. A solder is embedded in the recess formed between the cover plate and the steel surface 1, to repair the cut-out of the steel surface 1.

Description

本発明は、対象物の鋼面からサンプルを採取するサンプリング及び補修方法に関するものである。   The present invention relates to a sampling and repair method for collecting a sample from a steel surface of an object.

一般に、化学プラントには圧力容器、リアクタ等の種々の構造物が配設されている。このような構造物の壁面や溶接部等を検査する際には、筒状の切出機器によりサンプルを円柱状にくり抜いて採取し、当該サンプルを種々の検査機器で検査している。またサンプルをくり抜いた孔には、補修用のフランジ配管を溶接して取り付け、構造物の復旧を可能にしている。   Generally, various structures such as a pressure vessel and a reactor are disposed in a chemical plant. When inspecting the wall surface or welded part of such a structure, a sample is cut out in a cylindrical shape by a cylindrical cutting device, and the sample is inspected by various inspection devices. In addition, a flange pipe for repair is welded and attached to the hole in which the sample is cut out, so that the structure can be restored.

尚、サンプリング方法及びその装置の一般的技術水準を示すものとしては、例えば、特許文献１がある。   For example, Patent Document 1 shows a general technical level of the sampling method and its apparatus.

特開２００１−７９６５８号公報JP 2001-79658 A

しかしながら、構造物の壁面や溶接部等からなる鋼面に対しサンプルをくり抜いて採取する場合には、鋼面の裏面側の内部空間に多量の切粉が入り込むため、内部空間の環境や内部の流動媒体に悪影響を与えるという問題があった。またサンプルを円柱状に採取する場合には、サンプルの大きさや形状が限定されるため、検査対象の位置や採取個数が制約を受けるという問題があった。更にサンプルをくり抜いた孔の周囲に他のノズルや配管が存在する場合には、補修用のフランジ配管を取り付けることが困難になり、くり抜いた孔を容易に補修することができないという問題があった。更にまた構造物が圧力容器の場合、内圧が高くなるため、溶接部の肉厚が厚くなり、取付可能なフランジ配管が制限され、補修が困難になるという問題があった。   However, when a sample is cut out and collected from the steel surface consisting of the wall surface or welded part of the structure, a large amount of chips enter the internal space on the back side of the steel surface. There was a problem of adversely affecting the fluid medium. Further, when a sample is collected in a cylindrical shape, there is a problem that the position and number of samples to be inspected are restricted because the size and shape of the sample are limited. In addition, when there are other nozzles or pipes around the hole in which the sample is hollowed out, it becomes difficult to attach the flange pipe for repair, and there is a problem that the hole that has been hollowed out cannot be easily repaired. . Furthermore, when the structure is a pressure vessel, the internal pressure becomes high, so that the thickness of the welded portion is increased, the flange piping that can be attached is limited, and repair is difficult.

本発明は、斯かる実情に鑑み、鋼面の裏面側の空間に切粉が入り込むことを抑制し、且つサンプルの採取や補修を容易に行うサンプリング及び補修方法を提供することを目的とするものである。   In view of such circumstances, the present invention aims to provide a sampling and repair method that suppresses the entry of chips into the space on the back side of the steel surface, and that facilitates sampling and repair of samples. It is.

本発明のサンプリング及び補修方法は、対象物の鋼面からサンプルを切り抜いて採取するサンプリング工程と、前記サンプルを採取した鋼面の切り抜き孔を補修する補修工程とを備えるサンプリング及び補修方法であって、
前記サンプリング工程は、鋼面の表面側から裏面側に向かう非貫通穴をサンプルの外形位置に複数形成し、複数の非貫通穴をサンプルの外形に沿って連結するように切断し且つサンプルの周囲に外周溝を形成し、該外周溝の底部を鋼面の表面側から裏面側まで切断し、サンプルを鋼面から切り抜いて採取する工程であり、
前記補修工程は、鋼面の切り抜き孔に塞ぎ板を配置し、該塞ぎ板を鋼面に溶接して固定し、該塞ぎ板と鋼面で形成される凹部に溶接材を埋め込み、鋼面の切り抜き孔を補修する工程であるものである。 The sampling and repair method of the present invention is a sampling and repair method including a sampling step of cutting out a sample from a steel surface of an object and a repairing step of repairing a cutout hole of the steel surface from which the sample has been collected. ,
In the sampling step, a plurality of non-through holes extending from the front surface side to the back surface side of the steel surface are formed at the outer position of the sample, the plurality of non-through holes are cut so as to be connected along the outer shape of the sample, and the periphery of the sample Forming the outer circumferential groove, cutting the bottom of the outer circumferential groove from the surface side to the back side of the steel surface, and cutting out the sample from the steel surface,
In the repairing step, a closing plate is disposed in a cut-out hole in the steel surface, the closing plate is welded and fixed to the steel surface, and a welding material is embedded in a recess formed by the closing plate and the steel surface. This is a process of repairing the cutout hole.

本発明のサンプリング及び補修方法において、前記サンプリング工程は、鋼面の断面でテーパ状の溝を掘り込んでサンプルの周囲に外周溝を形成することが好ましい。   In the sampling and repair method of the present invention, it is preferable that the sampling step forms a peripheral groove around the sample by digging a tapered groove in a cross section of the steel surface.

本発明のサンプリング及び補修方法において、前記サンプリング工程は、サンプルの表面に支持棒を仮固定してサンプルを支持することが好ましい。   In the sampling and repair method of the present invention, it is preferable that the sampling step supports the sample by temporarily fixing a support rod to the surface of the sample.

本発明のサンプリング及び補修方法において、前記補修工程は、塞ぎ板の表面に配置棒を仮固定して塞ぎ板を配置することが好ましい。   In the sampling and repairing method of the present invention, it is preferable that the repairing step is to place the closing plate by temporarily fixing an arrangement bar on the surface of the closing plate.

本発明のサンプリング及び補修方法によれば、サンプリング工程で、鋼面の表面側から裏面側に向かう非貫通穴をサンプルの外形位置に複数形成し、複数の非貫通穴をサンプルの外形に沿って連結するように切断し且つサンプルの周囲に外周溝を形成し、その後、外周溝の底部を鋼面の表面側から裏面側まで切断するので、鋼面の裏面側の内部空間に切粉が入り込むことを低減し、内部空間の環境や内部の流動媒体に悪影響を与えることを抑制できる。またサンプルの形状を円柱状に限定するものでなく、複数の非貫通穴の位置設定によってサンプルの大きさや形状を自由に設定し得るので、検査対象の位置や採取個数の制約を大幅に緩和することができる。更にサンプルを切り抜いた孔の周囲に他のノズルや配管が存在する場合であっても、補修用のフランジ配管でなく塞ぎ板を用いるので、他のノズル等が障害になることを減らし、切り抜いた孔を容易に補修することができる。更にまた構造物が圧力容器のように溶接部の肉厚が厚くなる箇所であっても、補修用のフランジ配管でなく塞ぎ板及び溶接材を用いるので、切り抜いた孔を容易に補修することができるという優れた効果を奏し得る。   According to the sampling and repair method of the present invention, in the sampling step, a plurality of non-through holes from the front surface side to the back surface side of the steel surface are formed at the outer position of the sample, and the plurality of non-through holes are formed along the outer shape of the sample. Cut to connect and form an outer peripheral groove around the sample, and then cut the bottom of the outer peripheral groove from the surface side to the back side of the steel surface, so that chips enter the internal space on the back side of the steel surface This can reduce the adverse effects on the internal space environment and the internal fluid medium. In addition, the sample shape is not limited to a cylindrical shape, and the size and shape of the sample can be freely set by setting the position of multiple non-through holes, greatly reducing the restrictions on the position of the inspection target and the number of samples to be examined. be able to. Furthermore, even if other nozzles or pipes exist around the hole from which the sample was cut out, the sealing plate is used instead of the flange pipe for repair, so the nozzles were cut out to reduce the obstacles to other nozzles. The hole can be repaired easily. Furthermore, even if the structure is a place where the thickness of the welded part is thick, such as a pressure vessel, it is possible to easily repair the cut-out hole because a sealing plate and a welding material are used instead of the flange pipe for repair. An excellent effect of being able to do so can be achieved.

本発明のサンプリング及び補修方法であってサンプリング工程を示す概念図である。It is the conceptual diagram which is a sampling and repair method of this invention, and shows a sampling process. 図１（Ａ）のＩＩ−ＩＩ方向の矢視図である。It is an arrow view of the II-II direction of FIG. 図１（Ｂ）のＩＩＩ−ＩＩＩ方向の矢視図である。It is an arrow view of the III-III direction of FIG. 本発明のサンプリング及び補修方法であって補修工程を示す概念図である。It is the sampling and repair method of this invention, and is a conceptual diagram which shows a repair process.

以下、本発明の実施の形態例を図１〜図４を参照して説明する。   Embodiments of the present invention will be described below with reference to FIGS.

実施の形態例のサンプリング及び補修方法は、構造体（対象物）の鋼面１からサンプル１ａを切り抜いて採取するサンプリング工程と、サンプル１ａを採取した鋼面１の切り抜き孔２（図４参照）を補修する補修工程とを備えている。ここで構造体は、化学プラントの圧力容器、リアクタ等に限定されるものでなく、他の機器や部材でも良い。また鋼面１は、表面及び裏面を有するならば特定の位置に限定されるものでなく、壁面、上面、下面、溶接部等のどのよう位置でも良い。更に鋼面１の形状も、特定の形状に限定されるものでなく、平面、曲面、凹凸面等のどのような形状でも良い。   The sampling and repair method according to the embodiment includes a sampling step of cutting out and collecting a sample 1a from a steel surface 1 of a structure (object), and a cutout hole 2 of the steel surface 1 from which the sample 1a is collected (see FIG. 4). And a repairing process for repairing. Here, the structure is not limited to a pressure vessel, a reactor, or the like of a chemical plant, but may be another device or member. The steel surface 1 is not limited to a specific position as long as it has a front surface and a back surface, and may be any position such as a wall surface, an upper surface, a lower surface, or a welded portion. Further, the shape of the steel surface 1 is not limited to a specific shape, and may be any shape such as a flat surface, a curved surface, and an uneven surface.

サンプリング工程は、最初にドリル等の穴開機を用いて図１（Ａ）、図２に示す如くサンプル１ａの外形位置に鋼面１の表面側から裏面側に向かう非貫通穴３を形成し、更に非貫通穴３をサンプル１ａの外形位置に沿って複数形成する。ここで非貫通穴３は、鋼面１の板厚を貫通するものでなく、5ｍｍ以上10ｍｍ以下の厚みを残して形成されるものである。また複数の非貫通穴３は、隣接する非貫通穴３との間隔が特に制限されるものではないが、15ｍｍ以上20ｍｍ以下の間隔が好ましい。 The sampling process first forms a non-through hole 3 from the front side of the steel surface 1 to the back side at the outer position of the sample 1a as shown in FIG. Further, a plurality of non-through holes 3 are formed along the outer position of the sample 1a. Here non-through holes 3 is not intended to penetrate the thickness of the steel surface 1, and is formed by leaving a 10mm thickness of not less than 5 mm. Moreover, although the space | interval with the non-through-hole 3 which adjoins the some non-through-hole 3 is not restrict | limited in particular, the space | interval of 15 mm or more and 20 mm or less is preferable.

次に、エアアークガウジングやプラズマガウジング等の掘削・切断機を用いて図１（Ｂ）、図３に示す如く複数の非貫通穴３をサンプル１ａの外形に沿って連結するように切断し、且つ鋼面１の断面でテーパ状の溝を掘り込んでサンプル１ａの周囲に外周溝４を形成する。ここでテーパ状の外周溝４の形状は、サンプル側の側面を傾斜させることなく、サンプル周りの鋼面側の側面を傾斜させるように掘り込んで形成されている。   Next, using a drilling / cutting machine such as air arc gouging or plasma gouging, cut the plural non-through holes 3 so as to be connected along the outer shape of the sample 1a as shown in FIG. A tapered groove is dug in the cross section of the steel surface 1 to form an outer peripheral groove 4 around the sample 1a. Here, the shape of the tapered outer peripheral groove 4 is formed by digging so as to incline the side surface on the steel surface side around the sample without inclining the side surface on the sample side.

続いて、図１（Ｃ）に示す如くサンプル１ａの表面に支持棒５を溶接して仮固定し、サンプル１ａの落下を防止するようにする。更に電動鋸等の切断機を用いて外周溝４の底部４ａを鋼面１の表面側から裏面側まで切断し、ブロック状のサンプル１ａを鋼面１から切り離す。なお支持棒５の仮固定とは、取り外し容易な固定を意味している。   Subsequently, as shown in FIG. 1C, the support bar 5 is welded and temporarily fixed to the surface of the sample 1a to prevent the sample 1a from falling. Further, the bottom 4 a of the outer circumferential groove 4 is cut from the front surface side to the back surface side of the steel surface 1 using a cutting machine such as an electric saw, and the block-shaped sample 1 a is separated from the steel surface 1. The temporary fixing of the support bar 5 means fixing that is easy to remove.

そして支持棒５等によりサンプル１ａを表面側へ引き抜き、鋼面１の裏面側から作業することなくサンプル１ａを採取する。またサンプル１ａの採取後には、サンプル１ａから支持棒５を取り外すことが好ましい。   Then, the sample 1a is pulled out to the front side with the support bar 5 or the like, and the sample 1a is collected without working from the back side of the steel surface 1. Moreover, it is preferable to remove the support bar 5 from the sample 1a after collecting the sample 1a.

一方、補修工程は、最初に図４（Ａ）に示す如く鋼面１の切り抜き孔２の大きさに合致する塞ぎ板６を準備し、塞ぎ板６の表面に配置棒７を溶接して仮固定する。そして塞ぎ板６を鋼面１の切り抜き孔２に表面側から挿入し、塞ぎ板６の裏面が鋼面１の裏面と連なるように配置する。なお配置棒７の仮固定とは、取り外し容易な固定を意味している。   On the other hand, in the repairing process, first, as shown in FIG. 4A, a closing plate 6 that matches the size of the cut-out hole 2 of the steel surface 1 is prepared, and a placement rod 7 is welded to the surface of the closing plate 6 to temporarily Fix it. Then, the closing plate 6 is inserted into the cutout hole 2 of the steel surface 1 from the front surface side, and is arranged so that the back surface of the closing plate 6 is continuous with the back surface of the steel surface 1. The temporary fixing of the arrangement bar 7 means fixing that is easy to remove.

続いてタングステンアーク溶接等の溶接機を用いて図４（Ｂ）に示す如く塞ぎ板６と鋼面１の間を溶接材８により表面側から溶接し、塞ぎ板６を鋼面１に固定する。   Subsequently, using a welding machine such as tungsten arc welding, the gap between the closing plate 6 and the steel surface 1 is welded from the surface side with the welding material 8 as shown in FIG. 4B, and the closing plate 6 is fixed to the steel surface 1. .

次に塞ぎ板６から配置棒７を取り外した後、被覆アーク溶接やタングステンアーク溶接等の溶接機を用いて図４（Ｃ）に示す如く塞ぎ板６と鋼面１で形成される凹部に溶接材９を埋め込む。ここで塞ぎ板６の材質は、構造物の鋼面１と同じ材質の高強度の板が好ましい。また塞ぎ板６と鋼面１を溶接する溶接材８は、延性を有し、割れにくいものが好ましい。更に凹部を埋める溶接材９は、構造物の鋼面１と同じ材質が好ましい。   Next, after removing the arrangement | positioning stick | rod 7 from the closing board 6, it welds to the recessed part formed with the closing board 6 and the steel surface 1 as shown in FIG.4 (C) using welding machines, such as covering arc welding and tungsten arc welding. The material 9 is embedded. Here, the material of the closing plate 6 is preferably a high-strength plate made of the same material as the steel surface 1 of the structure. Moreover, the welding material 8 which welds the closing plate 6 and the steel surface 1 has a ductility and the thing which is hard to break is preferable. Further, the welding material 9 filling the recess is preferably made of the same material as the steel surface 1 of the structure.

そしてグラインダ等の研削機を用いて表面側を滑らかに整え、鋼面１の裏面側から作業することなく、鋼面１の切り抜き孔２の補修を完了する。   Then, the front surface side is smoothed using a grinder such as a grinder, and the repair of the cutout hole 2 in the steel surface 1 is completed without working from the back surface side of the steel surface 1.

而して、このように実施の形態例によれば、サンプリング工程で、鋼面１の表面側から裏面側に向かう非貫通穴３をサンプル１ａの外形位置に複数形成し、複数の非貫通穴３をサンプル１ａの外形に沿って連結するように切断し且つサンプル１ａの周囲に外周溝４を形成し、その後、外周溝４の底部４ａを鋼面１の表面側から裏面側まで切断するので、鋼面１の裏面側の内部空間に切粉が入り込むことを低減し、内部空間の環境や内部の流動媒体に悪影響を与えることを抑制できる。またサンプル１ａの形状を円柱状に限定するものでなく、複数の非貫通穴３の位置設定によってサンプル１ａの大きさや形状を自由に設定し得るので、検査対象の位置や採取個数の制約を大幅に緩和することができる。更にサンプル１ａを切り抜いた箇所の周囲に他のノズルや配管が存在する場合であっても、補修用のフランジ配管でなく塞ぎ板６を用いるので、他のノズル等が障害になることを減らし、鋼面１の切り抜き孔２を容易に補修することができる。更にまた構造物が圧力容器のように溶接部の肉厚が厚くなる箇所であっても、補修用のフランジ配管でなく塞ぎ板６及び溶接材８，９を用いるので、鋼面１の切り抜き孔２を容易に補修することができる。   Thus, according to the embodiment as described above, in the sampling step, a plurality of non-through holes 3 from the front surface side to the back surface side of the steel surface 1 are formed at the outer position of the sample 1a, and a plurality of non-through holes are formed. 3 is cut along the outer shape of the sample 1a and the outer peripheral groove 4 is formed around the sample 1a, and then the bottom 4a of the outer peripheral groove 4 is cut from the front surface side to the rear surface side of the steel surface 1. It is possible to reduce the entry of chips into the internal space on the back surface side of the steel surface 1 and to suppress adverse effects on the environment of the internal space and the internal fluid medium. In addition, the shape of the sample 1a is not limited to a cylindrical shape, and the size and shape of the sample 1a can be freely set by setting the positions of the plurality of non-through holes 3, greatly restricting the position of the inspection object and the number of samples to be examined Can be relaxed. Furthermore, even when other nozzles and pipes exist around the part where the sample 1a is cut out, the blocking plate 6 is used instead of the flange pipes for repair, so that the other nozzles and the like are prevented from becoming an obstacle. The cutout hole 2 in the steel surface 1 can be easily repaired. Furthermore, even if the structure is a place where the thickness of the welded portion is thick, such as a pressure vessel, the sealing plate 6 and the welding materials 8 and 9 are used instead of the repair flange piping, so 2 can be easily repaired.

実施の形態例において、サンプリング工程は、鋼面１の断面でテーパ状の溝を掘り込んでサンプル１ａの周囲に外周溝４を形成するので、補修工程で塞ぎ板６と鋼面１の間を溶接する際に必要となる溶接の開先を好適に形成し、鋼面１の切り抜き孔２を一層容易に補修することができる。   In the embodiment, since the sampling step digs a tapered groove in the cross section of the steel surface 1 to form the outer peripheral groove 4 around the sample 1a, the space between the closing plate 6 and the steel surface 1 is repaired. It is possible to suitably form a welding groove required when welding and repair the cutout hole 2 of the steel surface 1 more easily.

実施の形態例において、サンプリング工程は、サンプル１ａの表面に支持棒５を仮固定してサンプル１ａを支持するので、サンプル１ａの落下を防止してサンプル１ａを鋼面１から一層容易に採取することができる。   In the embodiment, in the sampling step, the support rod 5 is temporarily fixed to the surface of the sample 1a to support the sample 1a, so that the sample 1a is prevented from falling and the sample 1a is more easily collected from the steel surface 1. be able to.

実施の形態例において、補修工程は、塞ぎ板６の表面に配置棒７を仮固定して塞ぎ板６を配置するので、塞ぎ板６の落下を防止すると共に塞ぎ板６を適切に配置し、鋼面１の切り抜き孔２を一層容易に補修することができる。   In the embodiment, in the repairing step, the disposing rod 7 is temporarily fixed on the surface of the closing plate 6 and the closing plate 6 is arranged, so that the closing plate 6 is prevented from falling and the closing plate 6 is appropriately arranged. The cutout hole 2 in the steel surface 1 can be repaired more easily.

尚、本発明のサンプリング及び補修方法は、上述の図示例にのみ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内において種々変更を加え得ることは勿論である。   It should be noted that the sampling and repair method of the present invention is not limited to the illustrated examples described above, and it is needless to say that various changes can be made without departing from the scope of the present invention.

１ 鋼面
１ａ サンプル
２ 切り抜き孔
３ 非貫通穴
４ 外周溝
４ａ 底部
５ 支持棒
６ 塞ぎ板
７ 配置棒
８ 溶接材
９ 溶接材 DESCRIPTION OF SYMBOLS 1 Steel surface 1a Sample 2 Cutout hole 3 Non-through hole 4 Outer peripheral groove 4a Bottom part 5 Support bar 6 Closing plate 7 Arrangement bar 8 Welding material 9 Welding material

Claims (4)

対象物の鋼面からサンプルを切り抜いて採取するサンプリング工程と、前記サンプルを採取した鋼面の切り抜き孔を補修する補修工程とを備えるサンプリング及び補修方法であって、
前記サンプリング工程は、鋼面の表面側から裏面側に向かう非貫通穴をサンプルの外形位置に複数形成し、複数の非貫通穴をサンプルの外形に沿って連結するように切断し且つサンプルの周囲に外周溝を形成し、該外周溝の底部を鋼面の表面側から裏面側まで切断し、サンプルを鋼面から切り抜いて採取する工程であり、
前記補修工程は、鋼面の切り抜き孔に塞ぎ板を配置し、該塞ぎ板を鋼面に溶接して固定し、該塞ぎ板と鋼面で形成される凹部に溶接材を埋め込み、鋼面の切り抜き孔を補修する工程であることを特徴とするサンプリング及び補修方法。 A sampling and repair method comprising a sampling step of cutting out and collecting a sample from a steel surface of an object, and a repairing step of repairing a cutout hole of the steel surface from which the sample has been collected,
In the sampling step, a plurality of non-through holes extending from the front surface side to the back surface side of the steel surface are formed at the outer position of the sample, the plurality of non-through holes are cut so as to be connected along the outer shape of the sample, and the periphery of the sample Forming the outer circumferential groove, cutting the bottom of the outer circumferential groove from the surface side to the back side of the steel surface, and cutting out the sample from the steel surface,
In the repairing step, a closing plate is disposed in a cut-out hole in the steel surface, the closing plate is welded and fixed to the steel surface, and a welding material is embedded in a recess formed by the closing plate and the steel surface. Sampling and repair method characterized in that it is a step of repairing a cutout hole. 前記サンプリング工程は、鋼面の断面でテーパ状の溝を掘り込んでサンプルの周囲に外周溝を形成することを特徴とする請求項１に記載のサンプリング及び補修方法。   The sampling and repair method according to claim 1, wherein the sampling step forms a peripheral groove around the sample by digging a tapered groove in a cross section of the steel surface. 前記サンプリング工程は、サンプルの表面に支持棒を仮固定してサンプルを支持することを特徴とする請求項１又は２に記載のサンプリング及び補修方法。   The sampling and repair method according to claim 1 or 2, wherein the sampling step supports the sample by temporarily fixing a support rod to the surface of the sample. 前記補修工程は、塞ぎ板の表面に配置棒を仮固定して塞ぎ板を配置することを特徴とする請求項１〜３のいずれかに記載のサンプリング及び補修方法。   The sampling and repair method according to any one of claims 1 to 3, wherein in the repairing step, the block is placed by temporarily fixing an arrangement rod on the surface of the block.
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