Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
NON-DESTRUCTIVE INSPECTION METHOD AND NON-DESTRUCTIVE INSPECTION SYSTEM OF PREFABRICATED CONCRETE PILE INSTALLED UNDERGROUND
PROBLEM TO BE SOLVED: To provide a new non-destructive inspection method and non-destructive inspection system which can accurately and non-destructively inspect a state of an underground prefabricated concrete pile which has a steel end plate at an end part (top part) like a PHC pile and an SC pile.SOLUTION: After a through hole 221 is drilled in an end plate 220 and a sensor 20 for detecting a reflection wave is provided on the end plate 220 or a pile body 210, a rod-like inspecting metal member 30 is inserted into the through hole 221. A top part of the inspecting metal member 30 is struck in such a state that a tip part of the inspecting metal member 30 contacts with the pile body 210, so that an elastic wave is directly input to the pile body 210. The reflection wave of the elastic wave is detected and analyzed. Consequently, because the elastic wave with a frequency meeting a purpose can be input without influence of a boundary between the end plate 220 and the pile body 210, a composite phenomenon of the reflection waves is suppressed so that each reflection wave can be accurately and separately detected.SELECTED DRAWING: Figure 1
【課題】ＰＨＣ杭やＳＣ杭などのように端部（頂部）に鋼製の端板を備えた地中に設置された既製コンクリート杭の状態を正確に非破壊検査できる新規な非破壊検査方法および非破壊検査システムの提供。【解決手段】端板220に貫通孔221を穿孔すると共に、その端板220または杭本体220に反射波を検出するセンサー20を設けた後、貫通孔221に棒状の検査用金属部材30を挿入してその先端を杭本体210に当接した状態でその頂部を叩いて杭本体220に直接弾性波を入力し、その反射波を検出して解析する。これにより、端板220と杭本体210境界の影響もなく、目的に遭った周波数の弾性波を入力できるため、反射波の合成現象が抑制されて各反射波を精度良く分離検出できる。【選択図】図１
NON-DESTRUCTIVE INSPECTION METHOD AND NON-DESTRUCTIVE INSPECTION SYSTEM OF PREFABRICATED CONCRETE PILE INSTALLED UNDERGROUND
PROBLEM TO BE SOLVED: To provide a new non-destructive inspection method and non-destructive inspection system which can accurately and non-destructively inspect a state of an underground prefabricated concrete pile which has a steel end plate at an end part (top part) like a PHC pile and an SC pile.SOLUTION: After a through hole 221 is drilled in an end plate 220 and a sensor 20 for detecting a reflection wave is provided on the end plate 220 or a pile body 210, a rod-like inspecting metal member 30 is inserted into the through hole 221. A top part of the inspecting metal member 30 is struck in such a state that a tip part of the inspecting metal member 30 contacts with the pile body 210, so that an elastic wave is directly input to the pile body 210. The reflection wave of the elastic wave is detected and analyzed. Consequently, because the elastic wave with a frequency meeting a purpose can be input without influence of a boundary between the end plate 220 and the pile body 210, a composite phenomenon of the reflection waves is suppressed so that each reflection wave can be accurately and separately detected.SELECTED DRAWING: Figure 1
【課題】ＰＨＣ杭やＳＣ杭などのように端部（頂部）に鋼製の端板を備えた地中に設置された既製コンクリート杭の状態を正確に非破壊検査できる新規な非破壊検査方法および非破壊検査システムの提供。【解決手段】端板220に貫通孔221を穿孔すると共に、その端板220または杭本体220に反射波を検出するセンサー20を設けた後、貫通孔221に棒状の検査用金属部材30を挿入してその先端を杭本体210に当接した状態でその頂部を叩いて杭本体220に直接弾性波を入力し、その反射波を検出して解析する。これにより、端板220と杭本体210境界の影響もなく、目的に遭った周波数の弾性波を入力できるため、反射波の合成現象が抑制されて各反射波を精度良く分離検出できる。【選択図】図１
NON-DESTRUCTIVE INSPECTION METHOD AND NON-DESTRUCTIVE INSPECTION SYSTEM OF PREFABRICATED CONCRETE PILE INSTALLED UNDERGROUND
地中に設置された既製コンクリート杭の非破壊検査方法および非破壊検査システム
MASAMUNE SUNAO (Autor:in)
25.05.2017
Patent
Elektronische Ressource
Japanisch
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