Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
To provide a freezing construction method capable of freezing the ground even if it is difficult to apply a freezing construction method in accordance with the previous freezing construction method and requiring no large scale construction facilities.SOLUTION: A freezing construction method on the ground where ground water flows comprises: a step of controlling ground water speed or/and flowing direction with liquid nitrogen using a freezing pipe 1; a step of keeping a frozen state of the ground by supplying second refrigerant (for example, liquefied carbon dioxide) to the freezing pipe 1 using circulation means; and a step of supplying the second refrigerant to the freezing pipe 1 after a temperature in the freezing pipe 1 becomes higher than a triple point of the second refrigerant upon measuring the temperature in the freezing pipe 1, wherein a channel of the liquid nitrogen and a channel of the second refrigerant is a common one.SELECTED DRAWING: Figure 1
【課題】従来の凍結工法では凍結工法が施工困難な地盤であっても凍結することが出来て、しかも、大規模な施工設備を必要としない凍結工法の提供。【解決手段】地下水流が存在する地盤に対する凍結工法において、凍結管１を使用して液体窒素により地下水の流速または／及び流向を制御する工程と、前記制御する工程の後に、循環運転手段を用いて、第２の冷媒（例えば液化二酸化炭素）を凍結管１に供給して地盤が凍結した状態を維持する工程と、凍結管１内の温度を計測し、凍結管１内の温度が第２の冷媒の三重点よりも高い温度となった後に第２の冷媒を凍結管１に供給する工程とを有し、液体窒素の流路と第２の冷媒の流路は共通する。【選択図】図１
To provide a freezing construction method capable of freezing the ground even if it is difficult to apply a freezing construction method in accordance with the previous freezing construction method and requiring no large scale construction facilities.SOLUTION: A freezing construction method on the ground where ground water flows comprises: a step of controlling ground water speed or/and flowing direction with liquid nitrogen using a freezing pipe 1; a step of keeping a frozen state of the ground by supplying second refrigerant (for example, liquefied carbon dioxide) to the freezing pipe 1 using circulation means; and a step of supplying the second refrigerant to the freezing pipe 1 after a temperature in the freezing pipe 1 becomes higher than a triple point of the second refrigerant upon measuring the temperature in the freezing pipe 1, wherein a channel of the liquid nitrogen and a channel of the second refrigerant is a common one.SELECTED DRAWING: Figure 1
【課題】従来の凍結工法では凍結工法が施工困難な地盤であっても凍結することが出来て、しかも、大規模な施工設備を必要としない凍結工法の提供。【解決手段】地下水流が存在する地盤に対する凍結工法において、凍結管１を使用して液体窒素により地下水の流速または／及び流向を制御する工程と、前記制御する工程の後に、循環運転手段を用いて、第２の冷媒（例えば液化二酸化炭素）を凍結管１に供給して地盤が凍結した状態を維持する工程と、凍結管１内の温度を計測し、凍結管１内の温度が第２の冷媒の三重点よりも高い温度となった後に第２の冷媒を凍結管１に供給する工程とを有し、液体窒素の流路と第２の冷媒の流路は共通する。【選択図】図１
FREEZING CONSTRUCTION METHOD
凍結工法
TACHIWADA YUICHI (Autor:in)
27.05.2021
Patent
Elektronische Ressource
Japanisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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