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A platform for research: civil engineering, architecture and urbanism
Pile foundation underpinning construction technology suitable for karst geology
The invention relates to the technical field of pile foundation underpinning, in particular to a pile foundation underpinning construction process suitable for karst geology, which comprises the following steps: pile cutting reinforcement body construction: adopting a pile grinding mode when a shield passes through the pile foundation underpinning, reserving a shield cabin opening condition, arranging a pre-reinforcement body in advance, and performing grouting reinforcement on the reinforcement body by adopting a ground sleeve valve pipe; a strong weathering stratum is obtained; the side, close to the road, of the foundation pit is reinforced through steel sheet piles, a steel waist beam and a newly-built underpinning beam are arranged in the interval defined by the steel sheet piles, and the opposite side faces and corners of the two long edges of the steel waist beam are reinforced through steel pipe supports; steel pipe piles are arranged on the peripheries of the corners of the foundation pit, a cover plate is arranged on the foundation pit, the cover plate and the foundation pit are connected through the steel pipe piles at the same time, and the part, provided with the cover plate, of the foundation pit completely covers the steel plate piles. Pile foundation underpinning can be achieved under the construction scene of karst geology, meanwhile, it is guaranteed that the underpinning structure is stably installed, and deformation is controlled within the safe range.
本申请涉及桩基托换的技术领域，尤其是涉及一种适用于岩溶地质的桩基托换施工工艺，包括步骤：截桩加固体施工：桩基托换在盾构通过时采用磨桩方式，预留盾构开仓条件，提前设置预加固体，加固体采用地面袖阀管进行注浆加固，得到强风化地层；基坑支护施工：基坑临近道路侧采用钢板桩加固，钢板桩所围拢的区间内设置有钢腰梁和新建托换梁，钢腰梁的两长边相对侧面、角部分别通过钢管支撑加固；盖板施工：基坑的角部外围设置有钢管桩，基坑上设置有盖板，盖板与基坑之间通过数个钢管桩同时进行连接，基坑设置有盖板的部分完全将钢板桩进行覆盖。能够在岩溶地质的施工场景下实现桩基托换，同时保证托换结构稳定安装，变形控制在安全范围内。
Pile foundation underpinning construction technology suitable for karst geology
The invention relates to the technical field of pile foundation underpinning, in particular to a pile foundation underpinning construction process suitable for karst geology, which comprises the following steps: pile cutting reinforcement body construction: adopting a pile grinding mode when a shield passes through the pile foundation underpinning, reserving a shield cabin opening condition, arranging a pre-reinforcement body in advance, and performing grouting reinforcement on the reinforcement body by adopting a ground sleeve valve pipe; a strong weathering stratum is obtained; the side, close to the road, of the foundation pit is reinforced through steel sheet piles, a steel waist beam and a newly-built underpinning beam are arranged in the interval defined by the steel sheet piles, and the opposite side faces and corners of the two long edges of the steel waist beam are reinforced through steel pipe supports; steel pipe piles are arranged on the peripheries of the corners of the foundation pit, a cover plate is arranged on the foundation pit, the cover plate and the foundation pit are connected through the steel pipe piles at the same time, and the part, provided with the cover plate, of the foundation pit completely covers the steel plate piles. Pile foundation underpinning can be achieved under the construction scene of karst geology, meanwhile, it is guaranteed that the underpinning structure is stably installed, and deformation is controlled within the safe range.
本申请涉及桩基托换的技术领域，尤其是涉及一种适用于岩溶地质的桩基托换施工工艺，包括步骤：截桩加固体施工：桩基托换在盾构通过时采用磨桩方式，预留盾构开仓条件，提前设置预加固体，加固体采用地面袖阀管进行注浆加固，得到强风化地层；基坑支护施工：基坑临近道路侧采用钢板桩加固，钢板桩所围拢的区间内设置有钢腰梁和新建托换梁，钢腰梁的两长边相对侧面、角部分别通过钢管支撑加固；盖板施工：基坑的角部外围设置有钢管桩，基坑上设置有盖板，盖板与基坑之间通过数个钢管桩同时进行连接，基坑设置有盖板的部分完全将钢板桩进行覆盖。能够在岩溶地质的施工场景下实现桩基托换，同时保证托换结构稳定安装，变形控制在安全范围内。
Pile foundation underpinning construction technology suitable for karst geology
一种适用于岩溶地质的桩基托换施工工艺
LIN QIHUI (author) / TIAN PEIXIAN (author) / WANG LONGHUI (author) / CHEN QIANRAN (author) / ZHOU JINWEN (author) / ZHOU WEIBIN (author) / WANG ZHINUAN (author)
2024-12-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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