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A platform for research: civil engineering, architecture and urbanism
Construction method for newly-built foundation pit close to deep foundation pit adjacent area of existing subway station
The invention discloses a construction method for a newly-built foundation pit close to a deep foundation pit adjacent area of an existing subway station. Comprising the steps of site treatment of a newly-built foundation pit, construction of inclined strut support piles in a near-connection area, construction of a shared fender post waist beam, construction of a support pile bearing platform, construction of inclined struts in the near-connection area, earth excavation in the near-connection area, construction of an underground structure in the near-connection area of the newly-built foundation pit, plain concrete backfilling below the inclined struts in the near-connection area, and cutting of the inclined struts in the underground structure. And using the support pile as an uplift pile of an underground structure, and backfilling soil in a near-connection area to a designed elevation. Existing subway foundation pit fender posts are used for forming fender posts of a new foundation pit, and a supporting structure of the bearing platform, the inclined struts and the waist beams is arranged, so that the influence of excavation of the new foundation pit on structures of subway engineering and other surrounding underground buildings is avoided; on the basis of ensuring the overall stability and safety of the foundation pit, the whole supporting system also plays a good role in controlling the displacement deformation of the foundation pit and the deformation influence of surrounding buildings and environments; engineering investment is effectively controlled, and the construction period is greatly shortened.
本发明公开了一种新建基坑紧临既有地铁车站深基坑近接区施工方法，包括新建基坑场地处理、近接区斜撑支座桩施工、共用围护桩腰梁施工、施作支座桩承台、近接区斜撑施工、近接区土方开挖、新建基坑近接区地下结构施工、近接区斜撑下方素砼回填、地下结构内部斜撑割除、支座桩用做地下结构抗拔桩及近接区回填土至设计标高等步骤。本发明通过借用现有地铁基坑围护桩，形成新基坑的围护桩，并通过设置承台‑斜撑‑腰梁的支撑结构，避免新基坑开挖对地铁工程及其他周边地下建筑的结构影响；整个支护体系在确保基坑整体稳定安全的基础上，对基坑的位移变形以及周边建筑和环境的变形影响也起到了很好的控制作用；本发明有效控制工程投资，大大缩短工期。
Construction method for newly-built foundation pit close to deep foundation pit adjacent area of existing subway station
The invention discloses a construction method for a newly-built foundation pit close to a deep foundation pit adjacent area of an existing subway station. Comprising the steps of site treatment of a newly-built foundation pit, construction of inclined strut support piles in a near-connection area, construction of a shared fender post waist beam, construction of a support pile bearing platform, construction of inclined struts in the near-connection area, earth excavation in the near-connection area, construction of an underground structure in the near-connection area of the newly-built foundation pit, plain concrete backfilling below the inclined struts in the near-connection area, and cutting of the inclined struts in the underground structure. And using the support pile as an uplift pile of an underground structure, and backfilling soil in a near-connection area to a designed elevation. Existing subway foundation pit fender posts are used for forming fender posts of a new foundation pit, and a supporting structure of the bearing platform, the inclined struts and the waist beams is arranged, so that the influence of excavation of the new foundation pit on structures of subway engineering and other surrounding underground buildings is avoided; on the basis of ensuring the overall stability and safety of the foundation pit, the whole supporting system also plays a good role in controlling the displacement deformation of the foundation pit and the deformation influence of surrounding buildings and environments; engineering investment is effectively controlled, and the construction period is greatly shortened.
本发明公开了一种新建基坑紧临既有地铁车站深基坑近接区施工方法，包括新建基坑场地处理、近接区斜撑支座桩施工、共用围护桩腰梁施工、施作支座桩承台、近接区斜撑施工、近接区土方开挖、新建基坑近接区地下结构施工、近接区斜撑下方素砼回填、地下结构内部斜撑割除、支座桩用做地下结构抗拔桩及近接区回填土至设计标高等步骤。本发明通过借用现有地铁基坑围护桩，形成新基坑的围护桩，并通过设置承台‑斜撑‑腰梁的支撑结构，避免新基坑开挖对地铁工程及其他周边地下建筑的结构影响；整个支护体系在确保基坑整体稳定安全的基础上，对基坑的位移变形以及周边建筑和环境的变形影响也起到了很好的控制作用；本发明有效控制工程投资，大大缩短工期。
Construction method for newly-built foundation pit close to deep foundation pit adjacent area of existing subway station
一种新建基坑紧临既有地铁车站深基坑近接区施工方法
ZHANG ZIGUANG (author) / YOU XUEPING (author) / WANG XUEFENG (author) / MAO RUIJIN (author) / ZHANG MENGQING (author) / ZHANG CHENG (author) / ZHANG MENG (author)
2023-04-04
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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