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A platform for research: civil engineering, architecture and urbanism
Construction method of special-shaped nested foundation pit combined supporting structure system
The invention relates to a construction method of a special-shaped nested foundation pit combined supporting structure system, which comprises the following steps of: leveling a target site, and constructing a wall top beam of an underground diaphragm wall around a hub after the underground diaphragm wall around the hub and an underground diaphragm wall of a station inside the hub are constructed; unified earth excavation of the foundation pit is conducted to the position of a first-stage concrete waist beam, and construction of stand columns and uplift piles in the foundation pit site is conducted; a concrete waist beam and a double-ring support structure are constructed; the special-shaped nested foundation pit is excavated to the first-level foundation pit bottom elevation in a partitioned and layered mode; along with the earth excavation of the station foundation pit in the hub, after the concrete of the virtual wall part at the top of the diaphragm wall is broken to the elevation position of the top beam bottom surface, the concrete top beam of the station foundation pit is constructed; after the earth is excavated to the designed elevation of the steel waist beam, the steel waist beam and the double-spliced steel support of the station foundation pit are erected; and earth excavation is conducted in a layered mode to the pit bottom of the special-shaped nested foundation pit. The technical problem that in the prior art, a traditional foundation pit supporting structure system cannot be suitable for foundation pit supporting in a special-shaped nesting mode is solved.
本发明涉及一种异形嵌套基坑组合支护结构系统的施工方法，包括：平整目标场地，在施工枢纽周围地下连续墙和枢纽内部车站地下连续墙之后，施工枢纽周围地下连续墙的墙顶冠梁；基坑统一土方开挖至一级砼腰梁位置，进行基坑场地内立柱兼抗拔桩的施作；进行砼腰梁和双环撑结构的施作；分区、分层开挖异形嵌套基坑至一级基坑底标高；随枢纽内车站基坑土方开挖，地连墙墙顶虚墙部分混凝土破除至冠梁底面高程位置后，施作车站基坑的砼冠梁；土方开挖至钢腰梁设计标高后，进行车站基坑的钢腰梁和双拼钢支撑架设；分层进行土方开挖至异形嵌套基坑的坑底。本发明缓解了现有技术中存在的传统的基坑支护结构体系不能适用异形嵌套形式的基坑支护的技术问题。
Construction method of special-shaped nested foundation pit combined supporting structure system
The invention relates to a construction method of a special-shaped nested foundation pit combined supporting structure system, which comprises the following steps of: leveling a target site, and constructing a wall top beam of an underground diaphragm wall around a hub after the underground diaphragm wall around the hub and an underground diaphragm wall of a station inside the hub are constructed; unified earth excavation of the foundation pit is conducted to the position of a first-stage concrete waist beam, and construction of stand columns and uplift piles in the foundation pit site is conducted; a concrete waist beam and a double-ring support structure are constructed; the special-shaped nested foundation pit is excavated to the first-level foundation pit bottom elevation in a partitioned and layered mode; along with the earth excavation of the station foundation pit in the hub, after the concrete of the virtual wall part at the top of the diaphragm wall is broken to the elevation position of the top beam bottom surface, the concrete top beam of the station foundation pit is constructed; after the earth is excavated to the designed elevation of the steel waist beam, the steel waist beam and the double-spliced steel support of the station foundation pit are erected; and earth excavation is conducted in a layered mode to the pit bottom of the special-shaped nested foundation pit. The technical problem that in the prior art, a traditional foundation pit supporting structure system cannot be suitable for foundation pit supporting in a special-shaped nesting mode is solved.
本发明涉及一种异形嵌套基坑组合支护结构系统的施工方法，包括：平整目标场地，在施工枢纽周围地下连续墙和枢纽内部车站地下连续墙之后，施工枢纽周围地下连续墙的墙顶冠梁；基坑统一土方开挖至一级砼腰梁位置，进行基坑场地内立柱兼抗拔桩的施作；进行砼腰梁和双环撑结构的施作；分区、分层开挖异形嵌套基坑至一级基坑底标高；随枢纽内车站基坑土方开挖，地连墙墙顶虚墙部分混凝土破除至冠梁底面高程位置后，施作车站基坑的砼冠梁；土方开挖至钢腰梁设计标高后，进行车站基坑的钢腰梁和双拼钢支撑架设；分层进行土方开挖至异形嵌套基坑的坑底。本发明缓解了现有技术中存在的传统的基坑支护结构体系不能适用异形嵌套形式的基坑支护的技术问题。
Construction method of special-shaped nested foundation pit combined supporting structure system
一种异形嵌套基坑组合支护结构体系的施工方法
LIU TENG (author) / CAI ZHIYONG (author) / WANG WENZHENG (author) / KONG HENG (author) / WANG QUANXIAN (author) / YANG DONGMEI (author) / LYU JINBIAO (author) / YANG XIANGLIANG (author) / QIAO GUOGANG (author) / LIN XUEBING (author)
2023-08-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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