已运营地铁间微距离桩基成孔施工技术
摘要:深圳宝安国际机场卫星厅上跨已运营的地铁11号线隧道,其新建转换结构的灌注桩与地铁结构间最小净距仅35cm,常规成孔方式难以保证地铁安全。通过技术探索与多方论证,采用全套筒全回转钻机与人工挖孔相结合的方式钻进成孔,总结出已运营地铁间微距离桩基成孔施工技术,不仅减少对地铁结构的扰动,而且确保桩基工程快速优质地实施,取得良好效果。
关键词:机场地铁隧道灌注桩钻机人工挖孔
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[3] 陈润军,韩萍,杨飞,等.全套管全回转成孔工艺在邻近地铁桥梁群桩施工中的应用[J].市政技术,2018,36(4):74-77.
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Construction Technology of Micro-distance Pile Foundation Hole Forming Between Operated Subways
Abstract: The satellite hall of Shenzhen Bao'an International Airport crosses the tunnel of Shenzhen Metro Line 11,which has been in operation already. Since the minimum net distance between the newlybuilt conversion structure of the cast-in pile and the subway structure is merely 35 cm,it is difficult to guarantee the safety of subway by conventional hole-forming method. Through technical exploration and multi-party argumentation,a combination of full sleeve rotary drilling rig and manual drilling was applied in hole-drilling and hole-forming. The hole-forming construction technology of micro-distance pile foundation between subway lines in operation was summarized,which can not only reduce the disturbance to the subway structure, but also ensure the high-speed and high-quality implementation of pile foundation engineering,achieving desirable results.
Keywords: airports; subways; tunnels; bored piles; drilling machines; artificial dig-hole
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