A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
TRACK SUPPORT RIGIDITY ESTIMATION METHOD AND SYSTEM
PROBLEM TO BE SOLVED: To provide a track support rigidity estimation method and system capable of easily and reliably estimating track support rigidity when a train is passing over a track.SOLUTION: A track support rigidity estimation method includes the steps for: applying a test load smaller than a train load on a rail 35 constructed on a sleeper installed on a ballast bed, and measuring a load and rail displacement at a load point; preparing an estimating formula to represent a relation between the load and rail displacement as a curved line; estimating rail displacement when a train load is applied on the load point on the basis of a measurement value of the load and rail displacement at the load point and the estimating formula; and calculating a load point track support rigidity by dividing the train load by the estimated rail displacement. The curved line inclination varies according to a sleeper support state in a range where the load is near that of the test load, while the inclination is nearly constant regardless of the sleeper support state in a range where the load is near that of the train load.SELECTED DRAWING: Figure 1
【課題】列車通過時の軌道支持剛性を容易に、確実に推定することができる軌道支持剛性推定方法及びシステムを提供する。【解決手段】バラスト道床上に配設されたまくらぎの上に敷設されたレール３５に、列車荷重より小さな試験荷重を載荷し、載荷点の載荷荷重及びレールの変位を測定する工程と、載荷荷重とレールの変位との関係を示す曲線を表す推定式を用意する工程と、載荷点の載荷荷重及びレールの変位の測定値と前記推定式とに基づき、載荷点に列車荷重が載荷されたときのレールの変位を推定する工程と、推定されたレールの変位で列車荷重を除して載荷点の軌道支持剛性を算出する工程と、を含み、曲線の傾きは、載荷荷重が試験荷重近傍の範囲ではまくらぎの支持状態に応じて変化し、載荷荷重が列車荷重近傍の範囲ではまくらぎの支持状態に係わらずほぼ一定である。【選択図】図１
TRACK SUPPORT RIGIDITY ESTIMATION METHOD AND SYSTEM
PROBLEM TO BE SOLVED: To provide a track support rigidity estimation method and system capable of easily and reliably estimating track support rigidity when a train is passing over a track.SOLUTION: A track support rigidity estimation method includes the steps for: applying a test load smaller than a train load on a rail 35 constructed on a sleeper installed on a ballast bed, and measuring a load and rail displacement at a load point; preparing an estimating formula to represent a relation between the load and rail displacement as a curved line; estimating rail displacement when a train load is applied on the load point on the basis of a measurement value of the load and rail displacement at the load point and the estimating formula; and calculating a load point track support rigidity by dividing the train load by the estimated rail displacement. The curved line inclination varies according to a sleeper support state in a range where the load is near that of the test load, while the inclination is nearly constant regardless of the sleeper support state in a range where the load is near that of the train load.SELECTED DRAWING: Figure 1
【課題】列車通過時の軌道支持剛性を容易に、確実に推定することができる軌道支持剛性推定方法及びシステムを提供する。【解決手段】バラスト道床上に配設されたまくらぎの上に敷設されたレール３５に、列車荷重より小さな試験荷重を載荷し、載荷点の載荷荷重及びレールの変位を測定する工程と、載荷荷重とレールの変位との関係を示す曲線を表す推定式を用意する工程と、載荷点の載荷荷重及びレールの変位の測定値と前記推定式とに基づき、載荷点に列車荷重が載荷されたときのレールの変位を推定する工程と、推定されたレールの変位で列車荷重を除して載荷点の軌道支持剛性を算出する工程と、を含み、曲線の傾きは、載荷荷重が試験荷重近傍の範囲ではまくらぎの支持状態に応じて変化し、載荷荷重が列車荷重近傍の範囲ではまくらぎの支持状態に係わらずほぼ一定である。【選択図】図１
TRACK SUPPORT RIGIDITY ESTIMATION METHOD AND SYSTEM
軌道支持剛性推定方法及びシステム
NAKAMURA TAKAHISA (author) / TANIGAWA HIKARU (author) / MOMOTANI YOSHITSUGU (author)
2018-04-26
Patent
Electronic Resource
Japanese
IPC:
E01B
PERMANENT WAY
,
Gleisoberbau
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