A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LIQUEFACTION COUNTERMEASURE STRUCTURE OF UNDERGROUND STRUCTURE
To provide a liquefaction countermeasure structure of an underground structure which can suppress a dynamic water pressure in earthquake even when rigidity of a ground improvement wall is reduced by introducing a technical concept for achieving such a configuration as to intentionally lower a degree of fixation of the ground improvement wall to the underground structure and permit lift, and is excellent in economical efficiency and workability.SOLUTION: Ground improvement bodies 2 having small improvement diameters S are constructed along both sides in an extension direction of an underground structure (existing utility tunnel) 1 until the ground improvement bodies reach a non-liquefaction layer 5 in the shape of the columns, and rod-like reinforcing members (reinforcements) 3 are built in the ground improvement bodies 2 until the reinforcing members do not reach the non-liquefaction layer 5, and thereby a ground improvement wall 4 is constructed; and embedding of the lower end of the ground improvement wall 4 to the non-liquefaction layer 5 is small, on the other hand, the upper end thereof is not constructed to be higher than the middle of the underground structure 1.SELECTED DRAWING: Figure 1
【課題】地中構造物への地盤改良壁の固定度を意図的に下げて浮き上がりを許容する構成を実現する技術的思想を導入することにより、地盤改良壁の剛性を低減するにもかかわらず地震時動水圧を抑えることが可能な、経済性、施工性に優れた地中構造物の液状化対策構造を提供する。【解決手段】地中構造物（既設の共同溝）１の延長方向両側に沿って、改良径Ｓの小さい地盤改良体２が柱列状に非液状化層５に到達するまで構築されると共に前記地盤改良体２の内部に棒状の補強部材（鉄筋）３が非液状化層５に到達しないように建て込まれることにより地盤改良壁４が造成されること、および、前記地盤改良壁４の下端部は非液状化層５への根入れが小さい一方、上端部は前記地中構造物１の中程よりも高く造成されていない。【選択図】図１
LIQUEFACTION COUNTERMEASURE STRUCTURE OF UNDERGROUND STRUCTURE
To provide a liquefaction countermeasure structure of an underground structure which can suppress a dynamic water pressure in earthquake even when rigidity of a ground improvement wall is reduced by introducing a technical concept for achieving such a configuration as to intentionally lower a degree of fixation of the ground improvement wall to the underground structure and permit lift, and is excellent in economical efficiency and workability.SOLUTION: Ground improvement bodies 2 having small improvement diameters S are constructed along both sides in an extension direction of an underground structure (existing utility tunnel) 1 until the ground improvement bodies reach a non-liquefaction layer 5 in the shape of the columns, and rod-like reinforcing members (reinforcements) 3 are built in the ground improvement bodies 2 until the reinforcing members do not reach the non-liquefaction layer 5, and thereby a ground improvement wall 4 is constructed; and embedding of the lower end of the ground improvement wall 4 to the non-liquefaction layer 5 is small, on the other hand, the upper end thereof is not constructed to be higher than the middle of the underground structure 1.SELECTED DRAWING: Figure 1
【課題】地中構造物への地盤改良壁の固定度を意図的に下げて浮き上がりを許容する構成を実現する技術的思想を導入することにより、地盤改良壁の剛性を低減するにもかかわらず地震時動水圧を抑えることが可能な、経済性、施工性に優れた地中構造物の液状化対策構造を提供する。【解決手段】地中構造物（既設の共同溝）１の延長方向両側に沿って、改良径Ｓの小さい地盤改良体２が柱列状に非液状化層５に到達するまで構築されると共に前記地盤改良体２の内部に棒状の補強部材（鉄筋）３が非液状化層５に到達しないように建て込まれることにより地盤改良壁４が造成されること、および、前記地盤改良壁４の下端部は非液状化層５への根入れが小さい一方、上端部は前記地中構造物１の中程よりも高く造成されていない。【選択図】図１
LIQUEFACTION COUNTERMEASURE STRUCTURE OF UNDERGROUND STRUCTURE
地中構造物の液状化対策構造
MORI MORIMASA (author) / KUWANO NOBUHISA (author) / MATSUMOTO YOSHIICHI (author) / TAYA YUJI (author) / HONDA TAKESHI (author) / YAMANAKA RYU (author)
2021-03-25
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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