A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of foundation pit support overcrossing existing subway line
The invention relates to a construction method of a foundation pit support overcrossing an existing subway line, which comprises the following steps of: S101, respectively constructing a pair of limiting tables on two sides of a foundation pit, constructing two rows of pile bodies between the pair of limiting tables, and inserting reinforcing pieces into the pile bodies; s103, a limiting assembly is installed at the top end of the reinforcing piece; s105, plain piles are constructed between the two rows of pile bodies, and a reinforcing soil body is constructed at the bottom of the foundation pit; s107, top beams are constructed at the top ends of the two rows of pile bodies, and supports are constructed between the top beams on the two sides of the foundation pit; and S109, a foundation pit is excavated between the pile bodies located on the inner side. According to the construction method, the retarder is added into the pile body, the initial setting time of the pile body is longer than the pile forming time, the lower end of the pile body is not solidified when the reinforcer is inserted, vibration equipment is not needed, and the pile forming quality is improved; and after the reinforcer sinks to the designed elevation, the reinforcer is temporarily suspended through the limiting assembly, and the limiting assembly is removed until the pile body is solidified, so that the reinforcer is fixed to the designed elevation, and super sinking is avoided.
本发明涉及一种上跨既有地铁线路的基坑围护施工方法，包括以下步骤：步骤S101：在基坑两侧分别施工一对限位台，一对限位台之间施工两排桩体，在桩体内插入加强件；步骤S103：加强件的顶端部安装限位组件；步骤S105：两排桩体之间施工素桩，对基坑底部施工加固土体；步骤S107：在两排桩体的顶端部施工冠梁，在基坑两侧的冠梁之间施工支撑；步骤S109：在位于内侧的桩体之间开挖基坑。本施工方法在桩体中加入缓凝剂，使桩体的初凝时间大于成桩时间，插入加强件时桩体的下端部未凝固，无需借助震动设备，提高成桩质量；加强件下沉至设计标高后，通过限位组件对加强件进行临时悬吊，直至桩体凝固后再拆除限位组件，使得加强件固定在设计标高处，避免超沉。
Construction method of foundation pit support overcrossing existing subway line
The invention relates to a construction method of a foundation pit support overcrossing an existing subway line, which comprises the following steps of: S101, respectively constructing a pair of limiting tables on two sides of a foundation pit, constructing two rows of pile bodies between the pair of limiting tables, and inserting reinforcing pieces into the pile bodies; s103, a limiting assembly is installed at the top end of the reinforcing piece; s105, plain piles are constructed between the two rows of pile bodies, and a reinforcing soil body is constructed at the bottom of the foundation pit; s107, top beams are constructed at the top ends of the two rows of pile bodies, and supports are constructed between the top beams on the two sides of the foundation pit; and S109, a foundation pit is excavated between the pile bodies located on the inner side. According to the construction method, the retarder is added into the pile body, the initial setting time of the pile body is longer than the pile forming time, the lower end of the pile body is not solidified when the reinforcer is inserted, vibration equipment is not needed, and the pile forming quality is improved; and after the reinforcer sinks to the designed elevation, the reinforcer is temporarily suspended through the limiting assembly, and the limiting assembly is removed until the pile body is solidified, so that the reinforcer is fixed to the designed elevation, and super sinking is avoided.
本发明涉及一种上跨既有地铁线路的基坑围护施工方法，包括以下步骤：步骤S101：在基坑两侧分别施工一对限位台，一对限位台之间施工两排桩体，在桩体内插入加强件；步骤S103：加强件的顶端部安装限位组件；步骤S105：两排桩体之间施工素桩，对基坑底部施工加固土体；步骤S107：在两排桩体的顶端部施工冠梁，在基坑两侧的冠梁之间施工支撑；步骤S109：在位于内侧的桩体之间开挖基坑。本施工方法在桩体中加入缓凝剂，使桩体的初凝时间大于成桩时间，插入加强件时桩体的下端部未凝固，无需借助震动设备，提高成桩质量；加强件下沉至设计标高后，通过限位组件对加强件进行临时悬吊，直至桩体凝固后再拆除限位组件，使得加强件固定在设计标高处，避免超沉。
Construction method of foundation pit support overcrossing existing subway line
一种上跨既有地铁线路的基坑围护施工方法
WANG JINCHI (author) / LIU GUIDONG (author) / DI PENG (author) / ZHU XINGFU (author) / LEI HAOJIE (author) / LU YAODONG (author) / CHE LONG (author) / LI YANG (author) / ZHANG YANYAN (author) / TIAN YU (author)
2024-02-06
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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