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A platform for research: civil engineering, architecture and urbanism
Inclined downward advanced prestress back shore structure in foundation pit and prestress applying method
The invention discloses an obliquely downward advanced prestress back shore structure in a foundation pit and a prestress applying method. The obliquely-downward advanced prestress back shore structure comprises an obliquely-downward supporting component, and the obliquely-downward supporting component is based on a near-pit-bottom horizontal support (16) and is arranged at the near-pit-bottom part of an enclosure in a back shore mode; the back shore stress application mechanism drives the inclined downward supporting component to apply back shore prestress to the portion, close to the pit bottom, of the enclosure based on the horizontal support close to the pit bottom. The method for applying the prestress in advance comprises the following steps: constructing an inclined downward advance prestress back shore structure, and completing the construction of the inclined downward advance prestress back shore structure before the subsequent digging operation of a lower layer; and the constructed obliquely-downward advanced prestress jacking structure is used for applying jacking prestress to the portion, close to the pit bottom, of the enclosure. According to the obliquely downward advanced prestress back shore structure and the advanced prestress applying method, the measure of applying the back shore prestress can be taken at the first time when displacement deformation possibly happens to the portion, close to the pit bottom, of the enclosure.
本发明公开了一种基坑内斜向下超前预应力顶撑结构和施加预应力方法。本发明的斜向下超前预应力顶撑结构包括斜向下支撑部件，该斜向下支撑部件基于近坑底水平支撑(16)并顶撑在围护近坑底部位处；顶撑加力机构驱动斜向下支撑部件基于近坑底水平支撑对围护近坑底部位施加顶撑预应力。本发明的超前施加预应力方法包括：构建斜向下超前预应力顶撑结构，并且在后续下阶层掘土作业前完成斜向下超前预应力顶撑结构的构建；利用所构建的斜向下超前预应力顶撑结构对围护近坑底部位施加顶撑预应力。本发明的斜向下超前预应力顶撑结构和超前施加预应力方法能够在围护近坑底部位可能发生位移变形的第一时间就可以采取施加顶撑预应力的措施。
Inclined downward advanced prestress back shore structure in foundation pit and prestress applying method
The invention discloses an obliquely downward advanced prestress back shore structure in a foundation pit and a prestress applying method. The obliquely-downward advanced prestress back shore structure comprises an obliquely-downward supporting component, and the obliquely-downward supporting component is based on a near-pit-bottom horizontal support (16) and is arranged at the near-pit-bottom part of an enclosure in a back shore mode; the back shore stress application mechanism drives the inclined downward supporting component to apply back shore prestress to the portion, close to the pit bottom, of the enclosure based on the horizontal support close to the pit bottom. The method for applying the prestress in advance comprises the following steps: constructing an inclined downward advance prestress back shore structure, and completing the construction of the inclined downward advance prestress back shore structure before the subsequent digging operation of a lower layer; and the constructed obliquely-downward advanced prestress jacking structure is used for applying jacking prestress to the portion, close to the pit bottom, of the enclosure. According to the obliquely downward advanced prestress back shore structure and the advanced prestress applying method, the measure of applying the back shore prestress can be taken at the first time when displacement deformation possibly happens to the portion, close to the pit bottom, of the enclosure.
本发明公开了一种基坑内斜向下超前预应力顶撑结构和施加预应力方法。本发明的斜向下超前预应力顶撑结构包括斜向下支撑部件，该斜向下支撑部件基于近坑底水平支撑(16)并顶撑在围护近坑底部位处；顶撑加力机构驱动斜向下支撑部件基于近坑底水平支撑对围护近坑底部位施加顶撑预应力。本发明的超前施加预应力方法包括：构建斜向下超前预应力顶撑结构，并且在后续下阶层掘土作业前完成斜向下超前预应力顶撑结构的构建；利用所构建的斜向下超前预应力顶撑结构对围护近坑底部位施加顶撑预应力。本发明的斜向下超前预应力顶撑结构和超前施加预应力方法能够在围护近坑底部位可能发生位移变形的第一时间就可以采取施加顶撑预应力的措施。
Inclined downward advanced prestress back shore structure in foundation pit and prestress applying method
基坑内斜向下超前预应力顶撑结构和施加预应力方法
YIN JI (author) / YU HAIZHOU (author) / WEI JIAQI (author) / LIU YIN (author) / LI XIANG (author) / ZHANG QIRUI (author) / JIN QI (author) / SHANG QI (author)
2024-12-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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