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A platform for research: civil engineering, architecture and urbanism
Open-cut top-down construction method for subway entrance and exit
The invention relates to the technical field of metro entrance and exit construction, in particular to a metro entrance and exit open excavation top-down construction method. In order to solve the problems that an existing construction method is long in construction period, high in construction cost and low in feasibility, the invention provides a set of novel and complete open-cut top-down construction method for the subway entrance and exit. The specific construction method comprises the steps of building envelope construction, waterproof curtain construction, dewatering well construction, earth excavation, structural bottom plate construction, structural side wall construction, ultra-deep structure part soil body grouting reinforcement, structural top plate construction, secondary foundation pit excavation, water collecting well construction and construction joint grouting treatment. According to the construction method, capping can be rapidly achieved, the construction progress is greatly accelerated, and it is ensured that the construction period target is achieved within preset time; the grouting bottom sealing construction can reduce water loss of soil layers around the foundation pit, the settlement amount is small, and the operation safety of surrounding structures and road municipal facilities is ensured.
本发明涉及地铁出入口施工技术领域，具体为地铁出入口明挖逆作施工方法。其为了解决现有的施工方法存在施工周期长、施工成本高、可行性低的问题，故提供了一套新的完整的地铁出入口明挖逆作施工方法，具体施工方法为围护结构施工→止水帷幕施工→降水井施工→土方开挖→施工结构底板→结构边墙→注浆加固超深结构部分土体→施工结构顶板→二次开挖基坑→施工收水井→施工缝注浆处理。该施工方法能快速实现封顶，大大加快施工进度，确保工期目标在预定时间内实现；注浆封底施工能减少基坑周边土层失水，较少沉降量，确保周边构筑物及道路市政设施的运营安全。
Open-cut top-down construction method for subway entrance and exit
The invention relates to the technical field of metro entrance and exit construction, in particular to a metro entrance and exit open excavation top-down construction method. In order to solve the problems that an existing construction method is long in construction period, high in construction cost and low in feasibility, the invention provides a set of novel and complete open-cut top-down construction method for the subway entrance and exit. The specific construction method comprises the steps of building envelope construction, waterproof curtain construction, dewatering well construction, earth excavation, structural bottom plate construction, structural side wall construction, ultra-deep structure part soil body grouting reinforcement, structural top plate construction, secondary foundation pit excavation, water collecting well construction and construction joint grouting treatment. According to the construction method, capping can be rapidly achieved, the construction progress is greatly accelerated, and it is ensured that the construction period target is achieved within preset time; the grouting bottom sealing construction can reduce water loss of soil layers around the foundation pit, the settlement amount is small, and the operation safety of surrounding structures and road municipal facilities is ensured.
本发明涉及地铁出入口施工技术领域，具体为地铁出入口明挖逆作施工方法。其为了解决现有的施工方法存在施工周期长、施工成本高、可行性低的问题，故提供了一套新的完整的地铁出入口明挖逆作施工方法，具体施工方法为围护结构施工→止水帷幕施工→降水井施工→土方开挖→施工结构底板→结构边墙→注浆加固超深结构部分土体→施工结构顶板→二次开挖基坑→施工收水井→施工缝注浆处理。该施工方法能快速实现封顶，大大加快施工进度，确保工期目标在预定时间内实现；注浆封底施工能减少基坑周边土层失水，较少沉降量，确保周边构筑物及道路市政设施的运营安全。
Open-cut top-down construction method for subway entrance and exit
地铁出入口明挖逆作施工方法
REN PENGPENG (author) / LIU DAPENG (author) / ZHAN YOUJUN (author) / WANG RUI (author) / LI WEI (author) / WANG SAI (author)
2023-12-29
Patent
Electronic Resource
Chinese
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