Foundation pile hole diameter expanding device

Abstract

The invention discloses a foundation pile hole diameter expanding device which comprises hollow stand columns, positioning assemblies, lifting assemblies and hole expanding assemblies. The positioning assemblies are installed on a foundation, the hollow stand columns are arranged in the positioning assemblies in a penetrating manner, a plurality of sets of pile holes are perpendicularly formed in the foundation, and supporting assemblies are installed at the bottoms of the hollow stand columns; the supporting assemblies are installed at the bottoms of the pile holes, the lifting assemblies are arranged on the hollow stand columns, the hole expanding assemblies are installed below the lifting assemblies through transmission assemblies, the rotating hole expanding assemblies driven by the lifting assemblies, and soil on the inner walls of the pile holes can be evenly cut off while the hole expanding assemblies ascend and descend in the pile holes; and the hole diameters of the pile holes are expanded while the shapes of the inner walls of the pile holes are not affected, and the hole diameter can be expanded without secondary punching.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a device for expanding the diameter of foundation pile holes. Background technique [0002] From the perspective of on-site construction, the foundation can be divided into natural foundation and artificial foundation. The foundation is the rock-soil bearing layer under the foundation. The natural foundation is a natural soil layer that can meet the requirements of bearing all the loads of the foundation in a natural state and does not require artificial reinforcement. It saves engineering costs and does not require manual treatment. The natural foundation is the natural soil layer on which the foundation can be placed directly without the need for foundation treatment. When the geological condition of the soil layer is good and the bearing capacity is strong, the natural foundation can be used; and under the condition of poor geological condition, such as slope l...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, secondary excavation is often required for the expansion of the pile hole, which is time-consuming and labor-intensive, and the efficiency is very low. Manual excavation will destroy the shape of the inner wall of the pile hole, affect the fit between the pile hole and the pile shaft, and may make the pile shaft and the pile hole deflection

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