Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Small-diameter pile foundation construction method
The invention discloses a construction method of a small-diameter pile foundation. The construction method comprises the following steps: S1, adopting artificial slurry as a slurry protection wall; s2, a drill bit, with the first diameter, of a rotary drilling machine is adopted for digging to the set depth, and then a pile casing is buried; replacing the drill bit with the first diameter with a drill bit with the diameter smaller than the first diameter by using an original drill rod, and performing rotary excavating to the designed elevation of the pile top; and finally, a long spiral drill bit with the diameter smaller than the second diameter is adopted for digging to the pile bottom, the construction method that one pile is dug every other pile is adopted in the construction process of the rotary drilling machine, and the pile center distance during construction is set to be two times of the designed pile center distance. S3, hole cleaning is conducted through a slurry changing method; s4, the multiple sections of guide pipes are sequentially connected and then installed in the drill hole; s5, underwater concrete is poured; s6, the slurry is discharged into a slurry pool to be treated and then recycled or cleared away and discharged out of a site; and S7, the pile casing is dismantled. According to the construction method of the small-diameter pile foundation, the phenomenon of pile breakage caused by extrusion stress generated by the pile can be avoided, and pile position deviation is avoided.
本发明公开了一种小直径桩基础施工方法，包括步骤S1，采用人工造浆作泥浆护壁；S2，先采用旋挖机第一直径的钻头挖至设定深度之后埋设护筒；然后使用原钻杆，将第一直径的钻头更换为直径小于第一直径的钻头，旋挖至桩顶设计标高处；最后采用直径小于第二直径的长螺旋钻头挖至桩底，且旋挖机的施工过程采用隔一桩挖一桩的施工方法，以将施工时桩心间距设定为设计时的桩心间距的两倍；S3、换浆法进行清孔；S4，将多段导管依次连接之后安装在钻孔内；S5，灌注水下混凝土；S6，泥浆排放至泥浆池内处理后循环利用或清退出场；S7，拆除护筒。本发明的小直径桩基础施工方法能够桩产生挤压应力造成断桩的现象，并且避免产生桩位偏移。
Small-diameter pile foundation construction method
The invention discloses a construction method of a small-diameter pile foundation. The construction method comprises the following steps: S1, adopting artificial slurry as a slurry protection wall; s2, a drill bit, with the first diameter, of a rotary drilling machine is adopted for digging to the set depth, and then a pile casing is buried; replacing the drill bit with the first diameter with a drill bit with the diameter smaller than the first diameter by using an original drill rod, and performing rotary excavating to the designed elevation of the pile top; and finally, a long spiral drill bit with the diameter smaller than the second diameter is adopted for digging to the pile bottom, the construction method that one pile is dug every other pile is adopted in the construction process of the rotary drilling machine, and the pile center distance during construction is set to be two times of the designed pile center distance. S3, hole cleaning is conducted through a slurry changing method; s4, the multiple sections of guide pipes are sequentially connected and then installed in the drill hole; s5, underwater concrete is poured; s6, the slurry is discharged into a slurry pool to be treated and then recycled or cleared away and discharged out of a site; and S7, the pile casing is dismantled. According to the construction method of the small-diameter pile foundation, the phenomenon of pile breakage caused by extrusion stress generated by the pile can be avoided, and pile position deviation is avoided.
本发明公开了一种小直径桩基础施工方法，包括步骤S1，采用人工造浆作泥浆护壁；S2，先采用旋挖机第一直径的钻头挖至设定深度之后埋设护筒；然后使用原钻杆，将第一直径的钻头更换为直径小于第一直径的钻头，旋挖至桩顶设计标高处；最后采用直径小于第二直径的长螺旋钻头挖至桩底，且旋挖机的施工过程采用隔一桩挖一桩的施工方法，以将施工时桩心间距设定为设计时的桩心间距的两倍；S3、换浆法进行清孔；S4，将多段导管依次连接之后安装在钻孔内；S5，灌注水下混凝土；S6，泥浆排放至泥浆池内处理后循环利用或清退出场；S7，拆除护筒。本发明的小直径桩基础施工方法能够桩产生挤压应力造成断桩的现象，并且避免产生桩位偏移。
Small-diameter pile foundation construction method
一种小直径桩基础施工方法
WANG RUI (Autor:in) / LAI MINGSONG (Autor:in) / HAN QINGZHI (Autor:in) / NAN HAORAN (Autor:in) / XIAO CHANGMING (Autor:in) / WANG GONGRONG (Autor:in) / NIU KAIGONG (Autor:in)
27.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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