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Foundation pit dewatering excavation method for overcrossing subway tunnel in complex environment
The invention relates to the field of foundation pit excavation, and provides a foundation pit dewatering excavation method for an overpass subway tunnel in a complex environment, which comprises the following steps: calibrating an excavation area of a foundation pit in a construction area, leveling the site of the excavation area, and reinforcing the inner side and the outer side of the foundation pit by adopting a three-axis mixing pile; carrying out precipitation construction treatment on the soil layer in the excavation area; a first enclosure structure is arranged on the periphery of the excavation area, a first soil layer is excavated to the depth of 3 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a second enclosure structure is arranged on the periphery of the excavation area, a second soil layer is excavated to the depth of 3 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a third enclosure structure is arranged on the periphery of the excavation area, a third soil layer is excavated to the depth of 2 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a fourth enclosure structure is arranged on the periphery of the excavation area, a fourth soil layer is excavated to the depth of 3.5 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; and a foundation pit bottom plate support is constructed.
本发明涉及基坑挖掘领域，提供一种复杂环境下上跨地铁隧道的基坑降水开挖方法，包括以下步骤：在施工区域内标定基坑的开挖区域，平整开挖区域场地，采用三轴搅拌桩对基坑内外侧进行加固；在开挖区域内的土层进行降水施工处理；在开挖区域周边布置第一道围护结构，开挖第一层土层至3m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第二道围护结构，开挖第二层土层至3m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第三道围护结构，开挖第三层土层至2m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第四道围护结构，开挖第四层土层至3.5m深，破除基坑内壁的三轴搅拌桩；施作基坑底板支护。
Foundation pit dewatering excavation method for overcrossing subway tunnel in complex environment
The invention relates to the field of foundation pit excavation, and provides a foundation pit dewatering excavation method for an overpass subway tunnel in a complex environment, which comprises the following steps: calibrating an excavation area of a foundation pit in a construction area, leveling the site of the excavation area, and reinforcing the inner side and the outer side of the foundation pit by adopting a three-axis mixing pile; carrying out precipitation construction treatment on the soil layer in the excavation area; a first enclosure structure is arranged on the periphery of the excavation area, a first soil layer is excavated to the depth of 3 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a second enclosure structure is arranged on the periphery of the excavation area, a second soil layer is excavated to the depth of 3 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a third enclosure structure is arranged on the periphery of the excavation area, a third soil layer is excavated to the depth of 2 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; a fourth enclosure structure is arranged on the periphery of the excavation area, a fourth soil layer is excavated to the depth of 3.5 m, and the three-axis stirring piles on the inner wall of the foundation pit are broken and removed; and a foundation pit bottom plate support is constructed.
本发明涉及基坑挖掘领域，提供一种复杂环境下上跨地铁隧道的基坑降水开挖方法，包括以下步骤：在施工区域内标定基坑的开挖区域，平整开挖区域场地，采用三轴搅拌桩对基坑内外侧进行加固；在开挖区域内的土层进行降水施工处理；在开挖区域周边布置第一道围护结构，开挖第一层土层至3m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第二道围护结构，开挖第二层土层至3m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第三道围护结构，开挖第三层土层至2m深，破除基坑内壁的三轴搅拌桩；在开挖区域周边布置第四道围护结构，开挖第四层土层至3.5m深，破除基坑内壁的三轴搅拌桩；施作基坑底板支护。
Foundation pit dewatering excavation method for overcrossing subway tunnel in complex environment
一种复杂环境下上跨地铁隧道的基坑降水开挖方法
ZENG LIANG (author) / ZHI DONGHAI (author) / WANG XINRONG (author) / ZHOU GUANGWEI (author) / ZHOU XIANQI (author) / LIN JINNA (author) / ZHONG XIANG (author) / LIU SIDE (author) / WEN QIFU (author)
2024-05-31
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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