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A platform for research: civil engineering, architecture and urbanism
Construction method for protecting subway tunnel by adopting symmetrical synchronous balance foundation pit excavation
The invention discloses a construction method for protecting a subway tunnel by adopting symmetrical synchronous balance foundation pit excavation, which comprises the following steps: S1, longitudinal segmentation: longitudinally dividing sections from one end to the other end, and carrying out construction section by section according to the division of the longitudinal sections; s2, transverse zoning: transversely dividing into three zones, symmetrically and synchronously performing downward excavation on the first zone and the second zone on the left and right sides of the subway tunnel, reserving a core soil zone on the top of the subway tunnel for sectioning, and performing groove-jumping excavation; s3, vertical layering is conducted, specifically, vertical layering excavation is conducted according to the height smaller than or equal to 2.50 m, the two sides of the subway tunnel are symmetrically and synchronously excavated downwards, and an underground space structure is constructed after excavation is conducted to the foundation elevation; and S4, core soil is reserved, specifically, the reserved core soil is excavated after construction of the underground space structures on the two sides of the subway tunnel is completed, subsections are divided according to the excavation longitudinal subsection length of the foundation pits on the two sides and longitudinal sections, groove jumping propelling is conducted, and one section is reversely pressed in time when one section is excavated. The safety of the tunnel structure is ensured.
本发明公开了一种采用对称同步平衡基坑开挖对地铁隧道保护的施工方法，包括以下步骤：S1、纵向分段：纵向由一端向另一端划分区段，施工按纵向区段划分逐段推进；S2、横向分区：横向共分三个区，地铁隧道左右侧一、二区对称同步向下开挖，地铁隧道顶预留核心土区分段、跳槽开挖；S3、竖向分层：竖向按小于等于2.50m分层开挖，地铁隧道两侧对称同步向下开挖，挖至基底标高后施工地下空间结构；S4、预留核心土：预留心核土在地铁隧道两侧地下空间结构施工完成后开挖，按两侧基坑开挖纵向分段长度，按纵向区段划分分段、跳槽推进，且开挖一段及时反压一段。本发明确保隧道结构安全。
Construction method for protecting subway tunnel by adopting symmetrical synchronous balance foundation pit excavation
The invention discloses a construction method for protecting a subway tunnel by adopting symmetrical synchronous balance foundation pit excavation, which comprises the following steps: S1, longitudinal segmentation: longitudinally dividing sections from one end to the other end, and carrying out construction section by section according to the division of the longitudinal sections; s2, transverse zoning: transversely dividing into three zones, symmetrically and synchronously performing downward excavation on the first zone and the second zone on the left and right sides of the subway tunnel, reserving a core soil zone on the top of the subway tunnel for sectioning, and performing groove-jumping excavation; s3, vertical layering is conducted, specifically, vertical layering excavation is conducted according to the height smaller than or equal to 2.50 m, the two sides of the subway tunnel are symmetrically and synchronously excavated downwards, and an underground space structure is constructed after excavation is conducted to the foundation elevation; and S4, core soil is reserved, specifically, the reserved core soil is excavated after construction of the underground space structures on the two sides of the subway tunnel is completed, subsections are divided according to the excavation longitudinal subsection length of the foundation pits on the two sides and longitudinal sections, groove jumping propelling is conducted, and one section is reversely pressed in time when one section is excavated. The safety of the tunnel structure is ensured.
本发明公开了一种采用对称同步平衡基坑开挖对地铁隧道保护的施工方法，包括以下步骤：S1、纵向分段：纵向由一端向另一端划分区段，施工按纵向区段划分逐段推进；S2、横向分区：横向共分三个区，地铁隧道左右侧一、二区对称同步向下开挖，地铁隧道顶预留核心土区分段、跳槽开挖；S3、竖向分层：竖向按小于等于2.50m分层开挖，地铁隧道两侧对称同步向下开挖，挖至基底标高后施工地下空间结构；S4、预留核心土：预留心核土在地铁隧道两侧地下空间结构施工完成后开挖，按两侧基坑开挖纵向分段长度，按纵向区段划分分段、跳槽推进，且开挖一段及时反压一段。本发明确保隧道结构安全。
Construction method for protecting subway tunnel by adopting symmetrical synchronous balance foundation pit excavation
采用对称同步平衡基坑开挖对地铁隧道保护的施工方法
ZHANG YIJIANG (author) / XIA JINBO (author) / PENG SHUYUAN (author) / DING YIXIAO (author) / FAN QING (author) / YANG HUI (author) / ZHANG ZAIFANG (author)
2023-05-05
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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