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A platform for research: civil engineering, architecture and urbanism
Construction method of ultra-deep foundation pit close to subway business line
The invention relates to a construction method of an ultra-deep foundation pit close to a subway business line, which comprises the following steps of: dividing an excavation area into an area far away from a subway and an area close to the subway, and further dividing the excavation area into a plurality of large foundation pits and a plurality of small foundation pits; vertical supporting construction is conducted between the adjacent large foundation pits and between the adjacent small foundation pits along the boundary of the area away from the subway and the area close to the subway; layered excavation and support construction is conducted on the first large foundation pit; after the first large foundation pit is constructed to positive and negative zero, a plurality of corresponding small foundation pits are constructed, the small foundation pits are excavated in a layered mode, and after each layer is excavated, a steel support with a first axial force compensation device is adopted for supporting; after the small foundation pit is excavated, a foundation cushion layer is poured, and a diagonal bracing I-shaped steel assembly is pre-buried in the foundation cushion layer; and the steps are repeated for construction until the whole excavation area is constructed. According to the construction method, the hidden danger range is reduced, after the construction working face is divided, resources input at a time are few, the construction period is short, the construction duration is shortened, and the potential safety hazards of subway operation are reduced.
本申请涉及一种紧邻地铁营业线的超深基坑施工方法，包括如下步骤：将开挖区域划分为远离地铁区域和临近地铁区域，并进一步划分为若干大基坑和若干小基坑；沿远离地铁区域和临近地铁区域分界处、相邻大基坑之间及相邻小基坑之间进行竖向支护施工；对首个大基坑进行分层开挖支护施工；首个大基坑施工至正负零后进行对应若干小基坑施工，小基坑分层开挖施工，每层开挖后采用带有第一轴力补偿装置的钢支撑进行支撑；小基坑开挖完成后浇筑基础垫层，基础垫层内预埋对撑工字钢组件；重复上述步骤施工，直至施工完成整个开挖区域。本发明中的施工方法将隐患范围缩小，且施工工作面经过分割后，单次投入的资源少、施工周期短，缩短了施工时长，降低了地铁运行的安全隐患。
Construction method of ultra-deep foundation pit close to subway business line
The invention relates to a construction method of an ultra-deep foundation pit close to a subway business line, which comprises the following steps of: dividing an excavation area into an area far away from a subway and an area close to the subway, and further dividing the excavation area into a plurality of large foundation pits and a plurality of small foundation pits; vertical supporting construction is conducted between the adjacent large foundation pits and between the adjacent small foundation pits along the boundary of the area away from the subway and the area close to the subway; layered excavation and support construction is conducted on the first large foundation pit; after the first large foundation pit is constructed to positive and negative zero, a plurality of corresponding small foundation pits are constructed, the small foundation pits are excavated in a layered mode, and after each layer is excavated, a steel support with a first axial force compensation device is adopted for supporting; after the small foundation pit is excavated, a foundation cushion layer is poured, and a diagonal bracing I-shaped steel assembly is pre-buried in the foundation cushion layer; and the steps are repeated for construction until the whole excavation area is constructed. According to the construction method, the hidden danger range is reduced, after the construction working face is divided, resources input at a time are few, the construction period is short, the construction duration is shortened, and the potential safety hazards of subway operation are reduced.
本申请涉及一种紧邻地铁营业线的超深基坑施工方法，包括如下步骤：将开挖区域划分为远离地铁区域和临近地铁区域，并进一步划分为若干大基坑和若干小基坑；沿远离地铁区域和临近地铁区域分界处、相邻大基坑之间及相邻小基坑之间进行竖向支护施工；对首个大基坑进行分层开挖支护施工；首个大基坑施工至正负零后进行对应若干小基坑施工，小基坑分层开挖施工，每层开挖后采用带有第一轴力补偿装置的钢支撑进行支撑；小基坑开挖完成后浇筑基础垫层，基础垫层内预埋对撑工字钢组件；重复上述步骤施工，直至施工完成整个开挖区域。本发明中的施工方法将隐患范围缩小，且施工工作面经过分割后，单次投入的资源少、施工周期短，缩短了施工时长，降低了地铁运行的安全隐患。
Construction method of ultra-deep foundation pit close to subway business line
一种紧邻地铁营业线的超深基坑施工方法
YAN GAOFENG (author) / MAO HONGFEI (author) / LI XING (author) / QIU ZHIKAI (author) / QI JUNCHENG (author) / MA HUAJIE (author) / HE JIANLIN (author) / ZHANG YANGFENG (author) / YE MAO (author) / WU WEI (author)
2024-11-12
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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