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A platform for research: civil engineering, architecture and urbanism
Vacuum support excavation method suitable for deep foundation pit in complex stratum close to existing building
The invention discloses a vacuum support excavation method suitable for a deep foundation pit in a complex stratum close to an existing building. The vacuum support excavation method comprises the steps that stand column piles are arranged in a soil body of the wall of the foundation pit; a vertical drainage body, a vertical reinforcement body, a peripheral vertical closed curtain, a grouting bag, a transverse drainage body and a horizontal closed layer are arranged according to a designed range; vacuumizing is conducted through a vacuum pressure source, and foundation pit excavation is conducted; a slope sealing layer and vacuum nails are laid on the wall of a newly-excavated foundation pit, and an inner supporting system is arranged in the foundation pit; the slope surface sealing layer is sealed through a slope bottom vertical sealing curtain; and the permanent structure is constructed, follow-up dismantling, recycling and backfilling work is carried out, vacuumizing is stopped after the permanent structure goes out of the ground, and follow-up dismantling and recycling work is carried out. The method has the double effects of retaining soil and stopping water, an inner supporting and protecting system is organically combined on the premise that a slope surface sealing layer is not damaged, non-slope excavation with the excavation depth exceeding 10 m and vertical excavation without diaphragm walls are supported, and the advantages of the manufacturing cost and the construction period are obvious.
本发明公开了一种适于临近既有建筑复杂地层深基坑的真空支护开挖法，包括在基坑坑壁土体里设置立柱桩；按设计划定范围设置竖向排水体、竖向加筋体、外围竖向密闭帷幕、注浆囊、横向排水体和水平密闭层；通过真空压力源抽真空并进行基坑开挖；在新开挖的基坑坑壁上铺设坡面密闭层和真空钉，并在基坑内设置内支撑系统；坡面密闭层通过坡底竖向密闭帷幕密封；进行永久结构物施工，并进行后续的拆除、回收、回填工作，永久结构物出地面后停止抽真空，并进行后续拆除、回收工作。本发明具有挡土和止水的双重作用，在不破坏坡面密闭层的前提下有机地结合了内支撑支护体系，支持开挖深度超过10m的非放坡开挖及无地连墙的垂直开挖，造价及工期优势明显。
Vacuum support excavation method suitable for deep foundation pit in complex stratum close to existing building
The invention discloses a vacuum support excavation method suitable for a deep foundation pit in a complex stratum close to an existing building. The vacuum support excavation method comprises the steps that stand column piles are arranged in a soil body of the wall of the foundation pit; a vertical drainage body, a vertical reinforcement body, a peripheral vertical closed curtain, a grouting bag, a transverse drainage body and a horizontal closed layer are arranged according to a designed range; vacuumizing is conducted through a vacuum pressure source, and foundation pit excavation is conducted; a slope sealing layer and vacuum nails are laid on the wall of a newly-excavated foundation pit, and an inner supporting system is arranged in the foundation pit; the slope surface sealing layer is sealed through a slope bottom vertical sealing curtain; and the permanent structure is constructed, follow-up dismantling, recycling and backfilling work is carried out, vacuumizing is stopped after the permanent structure goes out of the ground, and follow-up dismantling and recycling work is carried out. The method has the double effects of retaining soil and stopping water, an inner supporting and protecting system is organically combined on the premise that a slope surface sealing layer is not damaged, non-slope excavation with the excavation depth exceeding 10 m and vertical excavation without diaphragm walls are supported, and the advantages of the manufacturing cost and the construction period are obvious.
本发明公开了一种适于临近既有建筑复杂地层深基坑的真空支护开挖法，包括在基坑坑壁土体里设置立柱桩；按设计划定范围设置竖向排水体、竖向加筋体、外围竖向密闭帷幕、注浆囊、横向排水体和水平密闭层；通过真空压力源抽真空并进行基坑开挖；在新开挖的基坑坑壁上铺设坡面密闭层和真空钉，并在基坑内设置内支撑系统；坡面密闭层通过坡底竖向密闭帷幕密封；进行永久结构物施工，并进行后续的拆除、回收、回填工作，永久结构物出地面后停止抽真空，并进行后续拆除、回收工作。本发明具有挡土和止水的双重作用，在不破坏坡面密闭层的前提下有机地结合了内支撑支护体系，支持开挖深度超过10m的非放坡开挖及无地连墙的垂直开挖，造价及工期优势明显。
Vacuum support excavation method suitable for deep foundation pit in complex stratum close to existing building
一种适于临近既有建筑复杂地层深基坑的真空支护开挖法
LIU YUANFENG (author) / LI HONGXIN (author) / YANG ZHIJUN (author) / LIN HONGNENG (author) / ZHANG LE (author) / WANG KAI (author)
2023-11-21
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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