Foundation pit stand column pile hole flow state stabilized soil backfill material and preparation method thereof

The invention relates to the technical field of pile foundation construction, and discloses a preparation method of a foundation pit stand column pile hole flow-state stabilized soil backfill material, which comprises the following specific steps: 1) screening weathered soil; 2) weighing prepared materials according to a set formula; (3) adding water and materials into a vibration stirrer; and (4) stirring the materials by adopting the vibration stirrer. When the flow-state stabilized soil backfill material is prepared, firstly, weathered soil is screened, weathered soil particles meeting the set requirement are screened out and placed for use, then the materials are weighed and prepared according to the weight fraction ratio of the materials of the set formula, then water and the prepared materials are added into the vibration stirrer according to the set proportion to be stirred, and the water and the materials in the stirring cavity are uniformly stirred to a flow state, thereby completing the preparation