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PILE EVALUATION METHOD
To provide a pile evaluation method capable of accurately evaluating a support performance of a pile.SOLUTION: A pile evaluation method includes steps of: allowing a strike wave to be generated by tapping a head of a pile and acquiring a rise time difference of an impact elastic wave test until the strike wave propagates the pile as an elastic wave and propagates a head part as the elastic wave; acquiring an elastic wave propagation velocity of the pile; determining a length of an assumed pile; turning the pile and a surrounding ground into which the pile is disposed into an analysis model and calculating an analysis model rising time difference in the case that the impact elastic wave test is conducted on the analysis model; determining whether or not a difference between a rising time difference of an actual impact elastic wave test and the analysis mode rising time difference is not more than the predetermined set value; determining that the length of the pile is the same as the length of an assumed pile in the case that the difference between the rising time difference of the actual impact elastic wave test and the analysis mode rising time difference is not more than the predetermined set value.SELECTED DRAWING: Figure 8
【課題】的確に杭の支持性能を評価することが可能となる杭評価方法を提供する。【解決手段】杭評価方法は、杭の頭部をたたいて打撃波を発生させ、打撃波が弾性波として杭を伝播し杭の下端で反射した反射波が弾性波として頭部に伝播するまでの衝撃弾性波試験の立ち上がり時間差を取得するステップと、杭の弾性波伝播速度を取得するステップと、仮定した杭の長さを決定するステップと、杭および杭が設置される周囲の地盤を解析モデル化し、解析モデルに衝撃弾性波試験を行ったと仮定した場合の解析モデル立ち上がり時間差を演算するステップと、実際の衝撃弾性波試験の立ち上がり時間差と解析モデル立ち上がり時間差との差が設定値以下であるか否かを判定するステップと、実際の衝撃弾性波試験の立ち上がり時間差と解析モデル立ち上がり時間差との差分が予め定めた設定値以下である場合、杭の長さは仮定した杭の長さと同じと判断するステップと、を有する。【選択図】図８
PILE EVALUATION METHOD
To provide a pile evaluation method capable of accurately evaluating a support performance of a pile.SOLUTION: A pile evaluation method includes steps of: allowing a strike wave to be generated by tapping a head of a pile and acquiring a rise time difference of an impact elastic wave test until the strike wave propagates the pile as an elastic wave and propagates a head part as the elastic wave; acquiring an elastic wave propagation velocity of the pile; determining a length of an assumed pile; turning the pile and a surrounding ground into which the pile is disposed into an analysis model and calculating an analysis model rising time difference in the case that the impact elastic wave test is conducted on the analysis model; determining whether or not a difference between a rising time difference of an actual impact elastic wave test and the analysis mode rising time difference is not more than the predetermined set value; determining that the length of the pile is the same as the length of an assumed pile in the case that the difference between the rising time difference of the actual impact elastic wave test and the analysis mode rising time difference is not more than the predetermined set value.SELECTED DRAWING: Figure 8
【課題】的確に杭の支持性能を評価することが可能となる杭評価方法を提供する。【解決手段】杭評価方法は、杭の頭部をたたいて打撃波を発生させ、打撃波が弾性波として杭を伝播し杭の下端で反射した反射波が弾性波として頭部に伝播するまでの衝撃弾性波試験の立ち上がり時間差を取得するステップと、杭の弾性波伝播速度を取得するステップと、仮定した杭の長さを決定するステップと、杭および杭が設置される周囲の地盤を解析モデル化し、解析モデルに衝撃弾性波試験を行ったと仮定した場合の解析モデル立ち上がり時間差を演算するステップと、実際の衝撃弾性波試験の立ち上がり時間差と解析モデル立ち上がり時間差との差が設定値以下であるか否かを判定するステップと、実際の衝撃弾性波試験の立ち上がり時間差と解析モデル立ち上がり時間差との差分が予め定めた設定値以下である場合、杭の長さは仮定した杭の長さと同じと判断するステップと、を有する。【選択図】図８
PILE EVALUATION METHOD
杭評価方法
HOTTA HIROYUKI (author) / NAKAZAWA HARUO (author) / KIRIYAMA TAKATOSHI (author)
2019-02-28
Patent
Electronic Resource
Japanese
IPC:
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
/
E02D
FOUNDATIONS
,
Gründungen
/
G01B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
,
Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen
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