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Structure and construction technology of existing building independent foundation static pressure pile pilot tunnel
The invention discloses an existing building independent foundation static pressure pile pilot tunnel structure and a construction technology, and relates to the technical field of building engineering foundation reinforcement construction.The structure comprises a loess site and an independent foundation, a vertical pilot tunnel is excavated from the ground along the side face of the independent foundation, and the vertical pilot tunnel is excavated to the position below the bottom face of the foundation; a transverse pilot tunnel is excavated below the bottom face of the foundation, a foundation concrete cushion layer is arranged on the lower side of the independent foundation, and a plurality of static pressure piles are arranged in the transverse pilot tunnel; in the construction process, the static pressure steel pipe piles are mainly subjected to static pressure steel pipe pile reinforcement on the existing industrial and civil building independent foundations of the loess site through the construction processes of concrete filling, temporary underpinning, jacking deviation correction, final underpinning and the like, and the foundation of the existing industrial and civil building independent foundations of the loess site is reinforced by reasonably controlling the pilot tunnel excavation and pile pressing sequence and reasonably and timely performing temporary underpinning and other measures. And under the condition that the area of the horizontal pilot tunnel exceeds 25% of the base area of the foundation, the additional settlement of the existing building during construction is greatly reduced, so that the purpose of safe reinforcement construction is achieved.
本发明公开了一种既有建筑独立基础静压桩导坑的结构与施工工艺，涉及建筑工程基础加固施工技术领域，结构包括黄土场地和独立基础，从地面沿独立基础侧面开挖有竖向导坑，竖向导坑开挖到基础底面以下，再从基础底面以下开挖横向导坑，独立基础的下侧设置有基础混凝土垫层，横向导坑的内部均设置有多个静压桩；施工工艺中静压钢管桩内混凝土灌填、临时托换、顶升纠偏与最终托换等施工工艺主要对黄土场地既有工业与民用建筑独立基础进行静压钢管桩桩加固，通过合理控制导坑开挖与压桩顺序，以及合理及时进行临时托换等措施，在水平导坑面积超过基础底面积25％的条件下，大大降低了施工期间既有建筑的附加沉降，从而达到安全加固施工之目的。
Structure and construction technology of existing building independent foundation static pressure pile pilot tunnel
The invention discloses an existing building independent foundation static pressure pile pilot tunnel structure and a construction technology, and relates to the technical field of building engineering foundation reinforcement construction.The structure comprises a loess site and an independent foundation, a vertical pilot tunnel is excavated from the ground along the side face of the independent foundation, and the vertical pilot tunnel is excavated to the position below the bottom face of the foundation; a transverse pilot tunnel is excavated below the bottom face of the foundation, a foundation concrete cushion layer is arranged on the lower side of the independent foundation, and a plurality of static pressure piles are arranged in the transverse pilot tunnel; in the construction process, the static pressure steel pipe piles are mainly subjected to static pressure steel pipe pile reinforcement on the existing industrial and civil building independent foundations of the loess site through the construction processes of concrete filling, temporary underpinning, jacking deviation correction, final underpinning and the like, and the foundation of the existing industrial and civil building independent foundations of the loess site is reinforced by reasonably controlling the pilot tunnel excavation and pile pressing sequence and reasonably and timely performing temporary underpinning and other measures. And under the condition that the area of the horizontal pilot tunnel exceeds 25% of the base area of the foundation, the additional settlement of the existing building during construction is greatly reduced, so that the purpose of safe reinforcement construction is achieved.
本发明公开了一种既有建筑独立基础静压桩导坑的结构与施工工艺，涉及建筑工程基础加固施工技术领域，结构包括黄土场地和独立基础，从地面沿独立基础侧面开挖有竖向导坑，竖向导坑开挖到基础底面以下，再从基础底面以下开挖横向导坑，独立基础的下侧设置有基础混凝土垫层，横向导坑的内部均设置有多个静压桩；施工工艺中静压钢管桩内混凝土灌填、临时托换、顶升纠偏与最终托换等施工工艺主要对黄土场地既有工业与民用建筑独立基础进行静压钢管桩桩加固，通过合理控制导坑开挖与压桩顺序，以及合理及时进行临时托换等措施，在水平导坑面积超过基础底面积25％的条件下，大大降低了施工期间既有建筑的附加沉降，从而达到安全加固施工之目的。
Structure and construction technology of existing building independent foundation static pressure pile pilot tunnel
一种既有建筑独立基础静压桩导坑的结构与施工工艺
WEI CHANGBAO (author) / SONG BEIBEI (author) / DONG HONGJIAN (author) / QIAN MING (author) / AN BING (author) / HE ZHIFENG (author) / ZHAO FURONG (author) / MA JINGTAI (author) / MA XIYA (author) / YUE JIANGZHOU (author)
2024-01-05
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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