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A platform for research: civil engineering, architecture and urbanism
Underpinning construction method for pile foundation crossing existing protective building structure
The invention discloses an underpinning construction method for a pile foundation crossing an existing protective building structure. The underpinning construction method comprises: removing a ground structure and constructing an underpinned pile; constructing an underpinned plate; excavating a foundation pit downwards and constructing a primary steel support; continuing to excavate the foundation pit downwards and constructing a secondary steel support; continuing excavating to the bottom of the pit and constructing a bottom surface structure; constructing a bottom plate, a bottom longitudinal beam and sidewalls on the bottom surface structure, removing the secondary steel support, mounting an inverted support and then removing the primary steel support; continuing constructing the sidewalls to the underpinned plate, constructing a top plate and a top longitudinal beam, constructing uprights between the top and bottom longitudinal beams, and then removing the inverted support to form an underground structure space; and removing an internal underpinned pile portion exposed within the underground structure space. By means of the underpinning construction method for the pile foundation crossing the existing protective building structure, smooth construction of an underground structure, for example, an underground passage, can be realized without removing the existing protective building structure on the ground, and irreversible damage, caused by open cut method based construction operations, to the existing protective building structure on the ground can be avoided.
Underpinning construction method for pile foundation crossing existing protective building structure
The invention discloses an underpinning construction method for a pile foundation crossing an existing protective building structure. The underpinning construction method comprises: removing a ground structure and constructing an underpinned pile; constructing an underpinned plate; excavating a foundation pit downwards and constructing a primary steel support; continuing to excavate the foundation pit downwards and constructing a secondary steel support; continuing excavating to the bottom of the pit and constructing a bottom surface structure; constructing a bottom plate, a bottom longitudinal beam and sidewalls on the bottom surface structure, removing the secondary steel support, mounting an inverted support and then removing the primary steel support; continuing constructing the sidewalls to the underpinned plate, constructing a top plate and a top longitudinal beam, constructing uprights between the top and bottom longitudinal beams, and then removing the inverted support to form an underground structure space; and removing an internal underpinned pile portion exposed within the underground structure space. By means of the underpinning construction method for the pile foundation crossing the existing protective building structure, smooth construction of an underground structure, for example, an underground passage, can be realized without removing the existing protective building structure on the ground, and irreversible damage, caused by open cut method based construction operations, to the existing protective building structure on the ground can be avoided.
Underpinning construction method for pile foundation crossing existing protective building structure
PANG XIAOJUN (author) / ZHU BICHENG (author) / FU DAWEI (author) / LU WANG (author) / WANG SHUANGMIN (author) / WU YADONG (author)
2016-02-24
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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