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Front segmented bag type grouting steel pipe supporting system and construction method thereof
The invention relates to the field of foundation pit engineering, and discloses a preposed segmented bag type grouting steel pipe supporting system which comprises foundation pit fender posts, preposed segmented bag type grouting steel pipe piles, a reinforcement cushion layer, a basement structure and a force transmission belt. Each preposed segmented bag type grouting steel pipe pile comprises a steel pipe body, a pile tip and a bag, and each steel pipe body comprises segmented steel pipe joints and a steel sleeve; the lower end of the steel pipe body is provided with a grout outlet, and the outer side of the grout outlet is covered with a bag. The method comprises the following steps: constructing fender posts; digging a groove; measuring and placing a pile position; processing the steel pipe main body by sections; the first steel pipe section is vibrated in; lengthening the pipe joints of the segmented steel pipe; the steel pipe joint extension section is vibrated in; cement paste and gravels are filled in the steel pipe piles; welding steel pipe pile head anchoring steel bars; ring beam construction; and supporting area earth excavation is carried out. The length and the number of the sections of the sectional steel pipes can be adjusted according to the construction environment, the steel sleeves are used for welding and prolonging the sections of the steel pipes in the pile pressing process, and the use range of the pile is widened. The bag can restrain slurry diffusion to form an expanded body, and the bearing capacity of the pile is improved.
本发明涉及基坑工程领域，公开一种前置分段囊式注浆钢管支护体系，包括基坑围护桩、前置分段囊式注浆钢管桩、配筋垫层、地下室结构、传力带，前置分段囊式注浆钢管桩包括钢管主体、桩尖、囊袋，钢管主体包括分段钢管管节和钢套管，钢管主体下端设出浆孔，出浆孔外侧覆裹囊袋。步骤为：围护桩施工；沟槽开挖；桩位测放；钢管主体分段加工；首段钢管管节振入；分段钢管管节接长；钢管管节接长段振入；钢管桩内注水泥浆、填碎石；钢管桩桩头锚固钢筋焊接；圈梁施工；支撑区域土方开挖。分段式钢管可根据施工环境，调节分段长度与数量，压桩过程中利用钢套管将各段钢管管节焊接延长，扩大桩的使用范围。囊袋可约束泥浆扩散形成扩大体，提高桩承载力。
Front segmented bag type grouting steel pipe supporting system and construction method thereof
The invention relates to the field of foundation pit engineering, and discloses a preposed segmented bag type grouting steel pipe supporting system which comprises foundation pit fender posts, preposed segmented bag type grouting steel pipe piles, a reinforcement cushion layer, a basement structure and a force transmission belt. Each preposed segmented bag type grouting steel pipe pile comprises a steel pipe body, a pile tip and a bag, and each steel pipe body comprises segmented steel pipe joints and a steel sleeve; the lower end of the steel pipe body is provided with a grout outlet, and the outer side of the grout outlet is covered with a bag. The method comprises the following steps: constructing fender posts; digging a groove; measuring and placing a pile position; processing the steel pipe main body by sections; the first steel pipe section is vibrated in; lengthening the pipe joints of the segmented steel pipe; the steel pipe joint extension section is vibrated in; cement paste and gravels are filled in the steel pipe piles; welding steel pipe pile head anchoring steel bars; ring beam construction; and supporting area earth excavation is carried out. The length and the number of the sections of the sectional steel pipes can be adjusted according to the construction environment, the steel sleeves are used for welding and prolonging the sections of the steel pipes in the pile pressing process, and the use range of the pile is widened. The bag can restrain slurry diffusion to form an expanded body, and the bearing capacity of the pile is improved.
本发明涉及基坑工程领域，公开一种前置分段囊式注浆钢管支护体系，包括基坑围护桩、前置分段囊式注浆钢管桩、配筋垫层、地下室结构、传力带，前置分段囊式注浆钢管桩包括钢管主体、桩尖、囊袋，钢管主体包括分段钢管管节和钢套管，钢管主体下端设出浆孔，出浆孔外侧覆裹囊袋。步骤为：围护桩施工；沟槽开挖；桩位测放；钢管主体分段加工；首段钢管管节振入；分段钢管管节接长；钢管管节接长段振入；钢管桩内注水泥浆、填碎石；钢管桩桩头锚固钢筋焊接；圈梁施工；支撑区域土方开挖。分段式钢管可根据施工环境，调节分段长度与数量，压桩过程中利用钢套管将各段钢管管节焊接延长，扩大桩的使用范围。囊袋可约束泥浆扩散形成扩大体，提高桩承载力。
Front segmented bag type grouting steel pipe supporting system and construction method thereof
一种前置分段囊式注浆钢管支护体系及其施工方法
WU YANGHONG (author) / SHEN ZHONG (author) / DENG CHONG (author) / ZHU BAOJIAN (author) / SHEN CHONG (author) / JI ZEWEI (author)
2023-07-18
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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