A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Engineering pile splicing method for ultra-thick water-rich sand layer
The invention provides an engineering pile splicing method for an ultra-thick water-rich sand layer, and belongs to the field of buildings. The method comprises the steps that a dewatering well is constructed, and a site is leveled; trepanning construction is conducted on a manhole pile; a plurality of spaced grouting floral tubes are arranged on the periphery of the manhole pile, and compaction grouting is conducted on the grouting floral tubes; combined wall protection construction is conducted in the space defined by the grouting floral tubes; after an original pile head is excavated, an artificial air pick is adopted to break over-filling concrete until the over-filling concrete reaches the designed elevation of pile splicing, original pile steel bars are reserved for 35 days, then excavation continues to be conducted around an original pile manually, wall protection construction is conducted, and waterproof concrete is used for sealing the bottom; an outer reinforcement cage and an inner reinforcement cage are sequentially installed; and a sounding pipe and a pile end mud jacking pipe are pre-buried in the inner reinforcement cage, and pile core concrete is poured. By means ofthe method, it can be guaranteed that the water-rich super-thick sand layer protection wall does not generate the problems of quicksand, collapse, hole bottom surge and the like, and meanwhile the problem that workers cannot conduct welding in a narrow space is solved.
本申请提供一种超厚富水砂层的工程桩接桩方法，属于建筑领域。其包括：施工降水井，平整场地；对人孔桩进行开孔施工；在人孔桩的四周布置多根间隔的注浆花管，并对注浆花管进行压密注浆；在由多根注浆花管所围设的空间内进行组合式护壁施工；开挖至原桩头后，采用人工风镐破除超灌砼直至到达接桩设计标高处停止，将原桩钢筋保留35d，然后人工继续在原桩周围开挖，并进行护壁施工且使用防水混凝土封底；依次安装钢筋外笼和钢筋内笼；在钢筋内笼中预埋声测管及桩端压浆管，并浇筑桩芯混凝土。该方法能够保证富水超厚砂层护壁不产生流砂、塌方、孔底不管涌等问题，同时解决了工作人员在狭窄空间内无法焊接的问题。
Engineering pile splicing method for ultra-thick water-rich sand layer
The invention provides an engineering pile splicing method for an ultra-thick water-rich sand layer, and belongs to the field of buildings. The method comprises the steps that a dewatering well is constructed, and a site is leveled; trepanning construction is conducted on a manhole pile; a plurality of spaced grouting floral tubes are arranged on the periphery of the manhole pile, and compaction grouting is conducted on the grouting floral tubes; combined wall protection construction is conducted in the space defined by the grouting floral tubes; after an original pile head is excavated, an artificial air pick is adopted to break over-filling concrete until the over-filling concrete reaches the designed elevation of pile splicing, original pile steel bars are reserved for 35 days, then excavation continues to be conducted around an original pile manually, wall protection construction is conducted, and waterproof concrete is used for sealing the bottom; an outer reinforcement cage and an inner reinforcement cage are sequentially installed; and a sounding pipe and a pile end mud jacking pipe are pre-buried in the inner reinforcement cage, and pile core concrete is poured. By means ofthe method, it can be guaranteed that the water-rich super-thick sand layer protection wall does not generate the problems of quicksand, collapse, hole bottom surge and the like, and meanwhile the problem that workers cannot conduct welding in a narrow space is solved.
本申请提供一种超厚富水砂层的工程桩接桩方法，属于建筑领域。其包括：施工降水井，平整场地；对人孔桩进行开孔施工；在人孔桩的四周布置多根间隔的注浆花管，并对注浆花管进行压密注浆；在由多根注浆花管所围设的空间内进行组合式护壁施工；开挖至原桩头后，采用人工风镐破除超灌砼直至到达接桩设计标高处停止，将原桩钢筋保留35d，然后人工继续在原桩周围开挖，并进行护壁施工且使用防水混凝土封底；依次安装钢筋外笼和钢筋内笼；在钢筋内笼中预埋声测管及桩端压浆管，并浇筑桩芯混凝土。该方法能够保证富水超厚砂层护壁不产生流砂、塌方、孔底不管涌等问题，同时解决了工作人员在狭窄空间内无法焊接的问题。
Engineering pile splicing method for ultra-thick water-rich sand layer
一种超厚富水砂层的工程桩接桩方法
LI QINGHUI (author) / SHEN PENGFEI (author) / XIA YI (author)
2021-01-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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