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Synchronous excavation construction method for foundation pits with different depths on two sides of operating subway
The invention discloses a synchronous excavation construction method for foundation pits with different depths on two sides of an operating subway, and relates to the technical field of underground building engineering construction. The synchronous excavation construction method for the foundation pits with different depths on two sides of the operating subway comprises the following steps that S1, the excavation positions, areas and depths of the foundation pits on the two sides are determined; S2, numerical simulation is achieved; S3, symmetrical layered step-by-step excavation is conducted, and all supporting systems are constructed synchronously; S4, when the foundation pits on the two sides are excavated to a pit bottom elevation of a shallow foundation pit at the same time, a basement on the side, away from a subway, of a deep foundation pit is excavated to the pit bottom elevation position; S5, inclined struts are arranged between the pit bottom of the side, away from the subway, of the deep foundation pit and the existing underground diaphragm wall of a subway station; S6, bottom plates of the foundation pits on the two sides and top plates of all layers are constructed step by step, and all supporting systems of the foundation pits on the two sides are sequentially and symmetrically dismantled from bottom to top; and S7, residual underground structures of the foundation pits on the two sides are constructed. According to the synchronous excavation construction method for the foundation pits with different depths on two sides of the operating subway, construction is performed after simulation, synchronous excavation, supporting and support changing of the foundation pits on the two sides are guaranteed in the construction process, deformation of the subway station is reduced, the influence of foundation pit construction on subway operation is reduced, and a safety risk of subway operation is reduced.
本发明公开了一种运营地铁两侧不同深度基坑同期开挖施工方法，涉及地下建筑工程施工技术领域，包括以下步骤：S1、确定两侧基坑开挖位置、面积和深度；S2、数值模拟；S3、对称分层分步开挖，同步施工各道支撑体系；S4、两侧基坑同时开挖至浅基坑坑底标高时，将深基坑远离地铁一侧地下室开挖至坑底标高位置；S5、在深基坑远离地铁一侧坑底与地铁车站既有地连墙之间设置斜撑；S6、逐步施工两侧基坑的底板和各层顶板，并由下至上依次对称拆除两侧基坑的各道支撑体系；S7、施工两侧基坑剩余的地下结构。本发明通过先模拟后施工，并在施工中保证两侧基坑同步开挖、支撑和换撑，减少地铁车站的变形，降低基坑施工对运营地铁的影响，降低运营地铁的安全风险。
Synchronous excavation construction method for foundation pits with different depths on two sides of operating subway
The invention discloses a synchronous excavation construction method for foundation pits with different depths on two sides of an operating subway, and relates to the technical field of underground building engineering construction. The synchronous excavation construction method for the foundation pits with different depths on two sides of the operating subway comprises the following steps that S1, the excavation positions, areas and depths of the foundation pits on the two sides are determined; S2, numerical simulation is achieved; S3, symmetrical layered step-by-step excavation is conducted, and all supporting systems are constructed synchronously; S4, when the foundation pits on the two sides are excavated to a pit bottom elevation of a shallow foundation pit at the same time, a basement on the side, away from a subway, of a deep foundation pit is excavated to the pit bottom elevation position; S5, inclined struts are arranged between the pit bottom of the side, away from the subway, of the deep foundation pit and the existing underground diaphragm wall of a subway station; S6, bottom plates of the foundation pits on the two sides and top plates of all layers are constructed step by step, and all supporting systems of the foundation pits on the two sides are sequentially and symmetrically dismantled from bottom to top; and S7, residual underground structures of the foundation pits on the two sides are constructed. According to the synchronous excavation construction method for the foundation pits with different depths on two sides of the operating subway, construction is performed after simulation, synchronous excavation, supporting and support changing of the foundation pits on the two sides are guaranteed in the construction process, deformation of the subway station is reduced, the influence of foundation pit construction on subway operation is reduced, and a safety risk of subway operation is reduced.
本发明公开了一种运营地铁两侧不同深度基坑同期开挖施工方法，涉及地下建筑工程施工技术领域，包括以下步骤：S1、确定两侧基坑开挖位置、面积和深度；S2、数值模拟；S3、对称分层分步开挖，同步施工各道支撑体系；S4、两侧基坑同时开挖至浅基坑坑底标高时，将深基坑远离地铁一侧地下室开挖至坑底标高位置；S5、在深基坑远离地铁一侧坑底与地铁车站既有地连墙之间设置斜撑；S6、逐步施工两侧基坑的底板和各层顶板，并由下至上依次对称拆除两侧基坑的各道支撑体系；S7、施工两侧基坑剩余的地下结构。本发明通过先模拟后施工，并在施工中保证两侧基坑同步开挖、支撑和换撑，减少地铁车站的变形，降低基坑施工对运营地铁的影响，降低运营地铁的安全风险。
Synchronous excavation construction method for foundation pits with different depths on two sides of operating subway
运营地铁两侧不同深度基坑同期开挖施工方法
SHI JING (author) / WANG BAODE (author) / REN LIANHAI (author) / TAN ZHONGSHENG (author) / PAN JIAMING (author) / ZUO KEWEI (author) / LI BINGBING (author) / HU ZHENGLIANG (author) / GAO BINGSHAN (author) / ZHANG XUBIN (author)
2021-09-07
Patent
Electronic Resource
Chinese
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