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A platform for research: civil engineering, architecture and urbanism
Pit-in-pit construction method for ultra-deep foundation pit adjacent to existing building
The invention relates to a pit-in-pit construction method for an ultra-deep foundation pit adjacent to an existing building, and belongs to the technical field of foundation pit construction. Before the foundation pit is excavated, three-axis deep stirring piles, a continuous wall and a pit-in-pit enclosure structure are constructed, and straight piles and inclined piles are included; redundant straight piles, inclined piles and three-axis deep stirring piles are continuously removed in the excavation foundation pit; digging a pit-in-pit from the top of the enclosure structure, and constructing a ring beam and a bracket; a bottom plate on the side, away from the pit-in-pit, of the foundation pit extends to a bracket, the ring beam above the pit-in-pit is poured to the bracket, and a construction joint between the ring beam and the bottom plate falls on the bracket; the center of the pit-in-pit parallel to the position where the existing building is located is divided into two sections along the two sides of the pit-in-pit, each section is divided into a plurality of subsections, each subsection is divided into three layers, excavation is conducted towards the center of the pit-in-pit at the same time, steel supports are installed in time during excavation of each layer, and construction of a bottom plate and side walls is completed when excavation is conducted to the third layer. The method can overcome the influence of the soft soil layer on the Yangtze river side and prevent the adjacent existing building from being damaged.
本发明涉及一种邻近既有建筑超深基坑坑中坑的施工方法，属于基坑施工技术领域。在基坑开挖前进行三轴深搅桩、连续墙和坑中坑围护结构施工，包括直桩和斜桩；开挖基坑中不断拆除多余的直桩、斜桩和三轴深搅桩；从围护结构顶部开挖坑中坑并施工圈梁和牛腿；基坑远离坑中坑的一侧底板延伸至牛腿，坑中坑上方的环梁浇筑至牛腿，使环梁和底板之间的施工缝落在牛腿上；以平行既有建筑所在位置的坑中坑的中心沿坑中坑两侧分两段，两段再各自分为若干分段，每分段分三层同时向坑中坑的中心开挖，每层开挖中及时安装钢支撑，开挖至第三层时完成底板和侧墙的施工。该方法能够克服长江边软弱土层影响并避免邻近既有建筑物被破坏。
Pit-in-pit construction method for ultra-deep foundation pit adjacent to existing building
The invention relates to a pit-in-pit construction method for an ultra-deep foundation pit adjacent to an existing building, and belongs to the technical field of foundation pit construction. Before the foundation pit is excavated, three-axis deep stirring piles, a continuous wall and a pit-in-pit enclosure structure are constructed, and straight piles and inclined piles are included; redundant straight piles, inclined piles and three-axis deep stirring piles are continuously removed in the excavation foundation pit; digging a pit-in-pit from the top of the enclosure structure, and constructing a ring beam and a bracket; a bottom plate on the side, away from the pit-in-pit, of the foundation pit extends to a bracket, the ring beam above the pit-in-pit is poured to the bracket, and a construction joint between the ring beam and the bottom plate falls on the bracket; the center of the pit-in-pit parallel to the position where the existing building is located is divided into two sections along the two sides of the pit-in-pit, each section is divided into a plurality of subsections, each subsection is divided into three layers, excavation is conducted towards the center of the pit-in-pit at the same time, steel supports are installed in time during excavation of each layer, and construction of a bottom plate and side walls is completed when excavation is conducted to the third layer. The method can overcome the influence of the soft soil layer on the Yangtze river side and prevent the adjacent existing building from being damaged.
本发明涉及一种邻近既有建筑超深基坑坑中坑的施工方法，属于基坑施工技术领域。在基坑开挖前进行三轴深搅桩、连续墙和坑中坑围护结构施工，包括直桩和斜桩；开挖基坑中不断拆除多余的直桩、斜桩和三轴深搅桩；从围护结构顶部开挖坑中坑并施工圈梁和牛腿；基坑远离坑中坑的一侧底板延伸至牛腿，坑中坑上方的环梁浇筑至牛腿，使环梁和底板之间的施工缝落在牛腿上；以平行既有建筑所在位置的坑中坑的中心沿坑中坑两侧分两段，两段再各自分为若干分段，每分段分三层同时向坑中坑的中心开挖，每层开挖中及时安装钢支撑，开挖至第三层时完成底板和侧墙的施工。该方法能够克服长江边软弱土层影响并避免邻近既有建筑物被破坏。
Pit-in-pit construction method for ultra-deep foundation pit adjacent to existing building
邻近既有建筑超深基坑坑中坑的施工方法
WANG BING (author) / WANG SHENGTAO (author) / PENG JIANYONG (author) / PENG BO (author) / HAN DING (author) / CAI HAIBING (author) / LIU WENSHENG (author) / WU YALEI (author) / GU XIAO (author) / YANG ZHE (author)
2024-01-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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