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A platform for research: civil engineering, architecture and urbanism
Construction method for secondary utilization of metro station secant pile foundation pit supporting structure system
The invention relates to a construction method of a secondary utilization metro station secant pile foundation pit supporting structure system, which belongs to the technical field of building construction, and comprises the following steps: S1, constructing three-surface three-axis deep stirring pile waterproof curtains and cast-in-situ bored fender posts except the side near a metro by a jumping method; supporting structures such as engineering piles, waterproof curtains, supporting piles, stand column piles, in-pit stirring piles and dewatering wells are constructed; s2, earthwork is excavated to the bottom elevation of the surrounding purlins, a first surrounding purlin and a support are constructed, the first surrounding purlin on the side adjacent to the subway is connected with the ring beam of the existing subway station, then a second surrounding purlin and a support are constructed, foundation pit earthwork continues to be excavated to the bottom of a foundation pit, and a basement cushion layer and a bottom plate are poured; s3, a replacement support is arranged between the subway accessory structure and a bottom plate of the commercial area, then the second support and the first support are dismantled, earthwork of the side wall of the foundation pit of the commercial area is backfilled, and the two basement body structures basically reach the stable state; and S4, corresponding support piles of the areas (entrances and exits and air shaft positions), needing to be communicated, of the subway accessory structure and the subway station are sequentially broken down layer by layer from top to bottom, and main structures on the two sides are poured. The method has the effect of improving the construction safety.
本申请涉及二次利用地铁车站咬合桩基坑支护结构体系的施工方法，属于建筑施工的技术领域，其包括以下步骤：S1、跳打法施工除临地铁侧外其他三面三轴深搅桩止水帷幕及钻孔灌注围护桩，施工工程桩、止水帷幕、支护桩、立柱桩和坑内搅拌桩，降水井等支护结构；S2、开挖土方至围檩底标高，施工第一道围檩及支撑，临地铁侧第一道围檩与既有地铁车站圈梁连接，再施工第二道围檩和支撑，继续开挖基坑土方至基坑底，浇筑地下室垫层和底板；S3、地铁附属结构与商业区底板间设置换撑，随后拆除第二道支撑和第一道支撑，回填商业区域基坑侧壁土方，两地下室主体结构基本达到稳定状态；S4、地铁附属结构与地铁车站须连通区域（出入口和风井位置）依次从上至下逐层破除相应支护桩，并浇筑两侧主体结构。本申请具有提高施工安全性的效果。
Construction method for secondary utilization of metro station secant pile foundation pit supporting structure system
The invention relates to a construction method of a secondary utilization metro station secant pile foundation pit supporting structure system, which belongs to the technical field of building construction, and comprises the following steps: S1, constructing three-surface three-axis deep stirring pile waterproof curtains and cast-in-situ bored fender posts except the side near a metro by a jumping method; supporting structures such as engineering piles, waterproof curtains, supporting piles, stand column piles, in-pit stirring piles and dewatering wells are constructed; s2, earthwork is excavated to the bottom elevation of the surrounding purlins, a first surrounding purlin and a support are constructed, the first surrounding purlin on the side adjacent to the subway is connected with the ring beam of the existing subway station, then a second surrounding purlin and a support are constructed, foundation pit earthwork continues to be excavated to the bottom of a foundation pit, and a basement cushion layer and a bottom plate are poured; s3, a replacement support is arranged between the subway accessory structure and a bottom plate of the commercial area, then the second support and the first support are dismantled, earthwork of the side wall of the foundation pit of the commercial area is backfilled, and the two basement body structures basically reach the stable state; and S4, corresponding support piles of the areas (entrances and exits and air shaft positions), needing to be communicated, of the subway accessory structure and the subway station are sequentially broken down layer by layer from top to bottom, and main structures on the two sides are poured. The method has the effect of improving the construction safety.
本申请涉及二次利用地铁车站咬合桩基坑支护结构体系的施工方法，属于建筑施工的技术领域，其包括以下步骤：S1、跳打法施工除临地铁侧外其他三面三轴深搅桩止水帷幕及钻孔灌注围护桩，施工工程桩、止水帷幕、支护桩、立柱桩和坑内搅拌桩，降水井等支护结构；S2、开挖土方至围檩底标高，施工第一道围檩及支撑，临地铁侧第一道围檩与既有地铁车站圈梁连接，再施工第二道围檩和支撑，继续开挖基坑土方至基坑底，浇筑地下室垫层和底板；S3、地铁附属结构与商业区底板间设置换撑，随后拆除第二道支撑和第一道支撑，回填商业区域基坑侧壁土方，两地下室主体结构基本达到稳定状态；S4、地铁附属结构与地铁车站须连通区域（出入口和风井位置）依次从上至下逐层破除相应支护桩，并浇筑两侧主体结构。本申请具有提高施工安全性的效果。
Construction method for secondary utilization of metro station secant pile foundation pit supporting structure system
二次利用地铁车站咬合桩基坑支护结构体系的施工方法
QIU YI (author) / FAN DEDONG (author) / ZHAO YONGJIE (author) / WANG JUNWEI (author) / ZHANG CHAO (author) / REN YONGJI (author) / CHEN SIXING (author) / LI DI (author) / WANG WENTAO (author) / LI WENBO (author)
2023-12-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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