Reaming grouting screw pile and pile foundation

The utility model discloses a reaming grouting screw pile and a pile foundation, which comprise a pile rod, at least one screw blade is arranged on the peripheral side of the pile rod along the lengthdirection; and the reaming device is arranged on the part, located between the end, used for being connected with a power head, of the pile rod and any spiral blade, so that a soil body is extruded in a soil layer in the length direction and/or the circumferential side of the pile rod. According to the chambering and grouting screw pile, chambering and grouting can be conducted on the upper portion of a soil layer through the chambering device, and the bearing capacity of the screw pile is improved on the premise that the specification is not changed. 本实用新型公开了一种扩孔注浆螺旋桩及桩基础，包括：桩杆，沿长度方向在周侧配置有至少一道螺旋叶片；扩孔装置，配置于所述桩杆位于所述桩杆用于连接动力头的端部与任意所述螺旋叶片之间的部分，以在土层内沿所述桩杆的长度方向和/或周侧挤压土体。本实用新型提供的扩孔注浆螺旋桩，能够通过扩孔装置对土层的上部扩孔及注浆，在不改变规格的前提下，提高螺旋桩的承载能力。