Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved construction process of powder spraying pile suitable for muddy soft soil foundation
The invention relates to an improved construction process of a powder spraying pile suitable for a muddy soft soil foundation. The process comprises the steps of (1) drilling and powder spraying: starting a stirring drilling machine, drilling while a drill bit rotates positively and spraying powder, and spraying a reinforcing material into a stirred soil body through a powder emitter, so that thesoil body and the reinforcing material are fully mixed; (2) lifting and stirring: the drill bit is reversed during drill lifting, rotating and lifting are conducted at the same time, the pipeline pressure during drilling machine lifting is controlled, and foundation deformation caused by too large pressure is prevented according to the principle that air outlet holes are not blocked; (3) secondarystirring: scattering the soil, and fully mixing the soil and the reinforcing material; (4) pile forming. According to the improved construction process of the powder spraying pile suitable for the muddy soft soil foundation, a stirring machine can be fully utilized, the soil body stirring frequency is increased, the same unconfined compressive strength and bearing capacity effect can be achievedthrough pile forming, the pile body uniformity effect is better, and the process of spraying compressed air is omitted, so that pipe blockage is avoided, and meanwhile the construction period is shortened.
本发明涉及一种适用于淤泥质软土地基的粉喷桩改进施工工艺，包括以下步骤：1)钻进喷粉：启动搅拌钻机，钻头为正旋转边钻进同时喷粉，同时通过粉体发射器将加固料喷入被搅拌的土体中，使土体和加固料进行充分拌和；2)提升搅拌：提钻时钻头呈反向，边旋转边提升，控制钻机提升时管道压力，以不堵塞出气孔为原则，预防压力过大对地基产生变形；3)二次搅拌：把土质打散，使土体和加固料充分拌合；4)成桩。本发明可充分利用搅拌机械，增加土体搅拌次数，成桩能够达到相同的无侧限抗压强度和承载力效果，而且桩体均匀性效果更好；减少了喷射压缩空气这道工序，不但保证了不堵管，同时缩短了施工工期。
Improved construction process of powder spraying pile suitable for muddy soft soil foundation
The invention relates to an improved construction process of a powder spraying pile suitable for a muddy soft soil foundation. The process comprises the steps of (1) drilling and powder spraying: starting a stirring drilling machine, drilling while a drill bit rotates positively and spraying powder, and spraying a reinforcing material into a stirred soil body through a powder emitter, so that thesoil body and the reinforcing material are fully mixed; (2) lifting and stirring: the drill bit is reversed during drill lifting, rotating and lifting are conducted at the same time, the pipeline pressure during drilling machine lifting is controlled, and foundation deformation caused by too large pressure is prevented according to the principle that air outlet holes are not blocked; (3) secondarystirring: scattering the soil, and fully mixing the soil and the reinforcing material; (4) pile forming. According to the improved construction process of the powder spraying pile suitable for the muddy soft soil foundation, a stirring machine can be fully utilized, the soil body stirring frequency is increased, the same unconfined compressive strength and bearing capacity effect can be achievedthrough pile forming, the pile body uniformity effect is better, and the process of spraying compressed air is omitted, so that pipe blockage is avoided, and meanwhile the construction period is shortened.
本发明涉及一种适用于淤泥质软土地基的粉喷桩改进施工工艺，包括以下步骤：1)钻进喷粉：启动搅拌钻机，钻头为正旋转边钻进同时喷粉，同时通过粉体发射器将加固料喷入被搅拌的土体中，使土体和加固料进行充分拌和；2)提升搅拌：提钻时钻头呈反向，边旋转边提升，控制钻机提升时管道压力，以不堵塞出气孔为原则，预防压力过大对地基产生变形；3)二次搅拌：把土质打散，使土体和加固料充分拌合；4)成桩。本发明可充分利用搅拌机械，增加土体搅拌次数，成桩能够达到相同的无侧限抗压强度和承载力效果，而且桩体均匀性效果更好；减少了喷射压缩空气这道工序，不但保证了不堵管，同时缩短了施工工期。
Improved construction process of powder spraying pile suitable for muddy soft soil foundation
一种适用于淤泥质软土地基的粉喷桩改进施工工艺
LI XIANGLIAN (Autor:in) / CHENG JINXIA (Autor:in) / LIU CHENGQUN (Autor:in) / JIAO YANG (Autor:in)
12.03.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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