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A platform for research: civil engineering, architecture and urbanism
Variable-inner-diameter threaded pile and threaded pile asynchronous construction method
The invention discloses a variable-inner-diameter threaded pile and a threaded pile asynchronous construction method. The variable-inner-diameter threaded pile comprises a variable-inner-diameter threaded pile body; the variable-inner-diameter threaded pile body comprises at least two threaded pile sections with the same outer diameter, and the diameter of a pile core of at least one threaded pilein the threaded pile sections is different from that of pile cores of the other threaded pile bodies. According to the method, soil is taken and drilled through a soil taking spiral drilling tool, the requirement of drilling for equipment torque is lowered, a method for soil sampling and hole guiding in advance and re-drilling pile forming adopts the pile core part for soil sampling and hole guiding, after soil sampling and drilling, the soil surge pressure around the pile is small, during re-drilling pile forming, screw teeth are heightened for soil sweeping and screw forming, disturbance tohole wall soil is small, and the pile side bearing capacity is high. In the process of drill lifting pumping materials to form a pile, when discharging is not smooth due to the fact that the soil layer surge pressure is large, the use amount of pile body concrete is increased in a stalling static pulling or forward rotation drill lifting mode, and quality accidents of pile body hole shrinkage, pile breakage and uncompacted concrete are avoided.
本发明公开了一种变内径螺纹桩及螺纹桩非同步施工方法，包括变内径螺纹桩桩身；变内径螺纹桩桩身包括至少两个等外径的螺纹桩段，螺纹桩段中至少有一段螺纹桩的桩芯与其余螺纹桩体的桩芯直径不同。利用取土螺旋钻具取土钻进，降低钻进对设备扭矩的要求，其中预先取土引孔，复钻成桩的方法，采用桩芯部分取土引孔，并且取土钻进后，桩周土回涌压力较小，复钻成桩时，加高螺齿扫土成螺，对孔壁土扰动小，桩侧承载力高。在提钻泵料成桩的过程中，遇到因土层回涌压力大，造成出料不畅时，采用停转静拔或者正转提钻的方式加大桩身混凝土用量，避免桩身缩径，断桩，混凝土不密实的质量事故。
Variable-inner-diameter threaded pile and threaded pile asynchronous construction method
The invention discloses a variable-inner-diameter threaded pile and a threaded pile asynchronous construction method. The variable-inner-diameter threaded pile comprises a variable-inner-diameter threaded pile body; the variable-inner-diameter threaded pile body comprises at least two threaded pile sections with the same outer diameter, and the diameter of a pile core of at least one threaded pilein the threaded pile sections is different from that of pile cores of the other threaded pile bodies. According to the method, soil is taken and drilled through a soil taking spiral drilling tool, the requirement of drilling for equipment torque is lowered, a method for soil sampling and hole guiding in advance and re-drilling pile forming adopts the pile core part for soil sampling and hole guiding, after soil sampling and drilling, the soil surge pressure around the pile is small, during re-drilling pile forming, screw teeth are heightened for soil sweeping and screw forming, disturbance tohole wall soil is small, and the pile side bearing capacity is high. In the process of drill lifting pumping materials to form a pile, when discharging is not smooth due to the fact that the soil layer surge pressure is large, the use amount of pile body concrete is increased in a stalling static pulling or forward rotation drill lifting mode, and quality accidents of pile body hole shrinkage, pile breakage and uncompacted concrete are avoided.
本发明公开了一种变内径螺纹桩及螺纹桩非同步施工方法，包括变内径螺纹桩桩身；变内径螺纹桩桩身包括至少两个等外径的螺纹桩段，螺纹桩段中至少有一段螺纹桩的桩芯与其余螺纹桩体的桩芯直径不同。利用取土螺旋钻具取土钻进，降低钻进对设备扭矩的要求，其中预先取土引孔，复钻成桩的方法，采用桩芯部分取土引孔，并且取土钻进后，桩周土回涌压力较小，复钻成桩时，加高螺齿扫土成螺，对孔壁土扰动小，桩侧承载力高。在提钻泵料成桩的过程中，遇到因土层回涌压力大，造成出料不畅时，采用停转静拔或者正转提钻的方式加大桩身混凝土用量，避免桩身缩径，断桩，混凝土不密实的质量事故。
Variable-inner-diameter threaded pile and threaded pile asynchronous construction method
一种变内径螺纹桩及螺纹桩非同步施工方法
LIU MIAO (author) / LIU ZHAOYUN (author) / LIU YAPU (author)
2020-06-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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