Plum-blossom-shaped cement soil mixing pile and forming method thereof

The invention relates to a triangular plum-blossom-shaped cement soil mixing pile and a forming method thereof. The plum-blossom-shaped cement soil mixing pile is good in perpendicularity, incline resisting capability and full in full-load bearing capacity. The cement soil mixing pile comprises a cement soil mixing pile, and two end faces and a cement soil mixing pile body are formed by connection of three plum-blossom-shaped petals. The plum-blossom-shaped cement soil mixing pile has the advantages that a pile foundation distributed in multiple angles is large in bearing capacity, bearing and supporting points are triangularly distributed, and the pile foundation is good in stability; when the pile foundation formed by the plum-blossom-shaped petals is positioned in a soft soil foundation, a plurality of plum-blossom-shaped petals identical in inclined angles act on a wall of the soft soil foundation like three projected ejection posts, so that the cement soil pile is ensured not to incline but perpendicularly stand in the soft soil foundation; due to the fact that a multiple-axis drilling rod sinks along a guiding frame, stirs and sprays cement paste at the same time, and the sinking direction and the stirring direction are opposite, so that the cement paste and soil can be fully mixed integrally, and high strength of the cement soil pile is ensured.