A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
VACUUM CONSOLIDATION METHOD COMBINED WITH BANKING
PROBLEM TO BE SOLVED: To provide a vacuum consolidation method combined with banking for improving a soft ground that allows a cap-type vacuum consolidation method to be applied efficiently, even to a soft ground for which an impermeable layer cannot be secured in a ground surface layer, when vacuum consolidation and banking are used in combination.SOLUTION: A vacuum consolidation method combined with banking for improving a soft ground uses a drain material 12 having an impermeable cap part 12a formed at a top part, a flexible drain hose 12b that extends from a top edge of the cap part, and a drain part 12c extending downward from the cap part, and comprises the following steps of: installing a plurality of the drain materials in a longitudinal direction in a ground G to be improved, keeping the cap part above a ground surface S; connecting the drain hose to a plurality of water collecting pipes 13 installed on the ground surface; air-tightly covering the entire ground to be improved with a double-face protection air-tight sheet 11 having both surfaces protected; applying a negative pressure on the drain material from a negative pressure source P, through the water collecting pipe; and placing a banking 15 on the double-face protection air-tight sheet.
【課題】真空圧密と盛土とを併用する場合、地盤表層部に難透水層を確保できない軟弱地盤においてもキャップ式真空圧密工法を効率的に適用可能な軟弱地盤改良のための盛土併用真空圧密工法を提供する。【解決手段】この盛土併用真空圧密工法は、上部に設けられた不透水性のキャップ部１２ａと、キャップ部の上端から延びる可撓性のある排水ホース１２ｂと、キャップ部から下側に延びるドレーン部１２ｃと、を有するドレーン材１２を用いる軟弱地盤改良のための盛土併用真空圧密工法であって、改良対象の地盤Ｇに対しドレーン材をキャップ部が地盤表面Ｓの上に位置するようにして縦方向に複数打設する工程と、地盤表面に配置された複数の集水管１３に排水ホースを接続する工程と、改良対象の地盤全体を両面が保護された両面保護気密シート１１により気密に覆う工程と、集水管を介して負圧源Ｐから負圧をドレーン材に作用させる工程と、両面保護気密シートの上に盛土１５をする工程と、を備える。【選択図】図５
VACUUM CONSOLIDATION METHOD COMBINED WITH BANKING
PROBLEM TO BE SOLVED: To provide a vacuum consolidation method combined with banking for improving a soft ground that allows a cap-type vacuum consolidation method to be applied efficiently, even to a soft ground for which an impermeable layer cannot be secured in a ground surface layer, when vacuum consolidation and banking are used in combination.SOLUTION: A vacuum consolidation method combined with banking for improving a soft ground uses a drain material 12 having an impermeable cap part 12a formed at a top part, a flexible drain hose 12b that extends from a top edge of the cap part, and a drain part 12c extending downward from the cap part, and comprises the following steps of: installing a plurality of the drain materials in a longitudinal direction in a ground G to be improved, keeping the cap part above a ground surface S; connecting the drain hose to a plurality of water collecting pipes 13 installed on the ground surface; air-tightly covering the entire ground to be improved with a double-face protection air-tight sheet 11 having both surfaces protected; applying a negative pressure on the drain material from a negative pressure source P, through the water collecting pipe; and placing a banking 15 on the double-face protection air-tight sheet.
【課題】真空圧密と盛土とを併用する場合、地盤表層部に難透水層を確保できない軟弱地盤においてもキャップ式真空圧密工法を効率的に適用可能な軟弱地盤改良のための盛土併用真空圧密工法を提供する。【解決手段】この盛土併用真空圧密工法は、上部に設けられた不透水性のキャップ部１２ａと、キャップ部の上端から延びる可撓性のある排水ホース１２ｂと、キャップ部から下側に延びるドレーン部１２ｃと、を有するドレーン材１２を用いる軟弱地盤改良のための盛土併用真空圧密工法であって、改良対象の地盤Ｇに対しドレーン材をキャップ部が地盤表面Ｓの上に位置するようにして縦方向に複数打設する工程と、地盤表面に配置された複数の集水管１３に排水ホースを接続する工程と、改良対象の地盤全体を両面が保護された両面保護気密シート１１により気密に覆う工程と、集水管を介して負圧源Ｐから負圧をドレーン材に作用させる工程と、両面保護気密シートの上に盛土１５をする工程と、を備える。【選択図】図５
VACUUM CONSOLIDATION METHOD COMBINED WITH BANKING
盛土併用真空圧密工法
NIIYA HIROSHI (author) / YONETANI HIROSHI (author)
2016-01-28
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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