Through the compaction to the proper earth layer in the pile hollow by the bearing disk machinery, the compaction can make close combination of the earth and concrete, so the earth and the concrete can both provide the bearing strength.

The compacted multi-branch bearing disk concrete bored pile is a new type of concrete pile with varied sections, which is composed of the main pile, branch pile, branch support and the bearing disk.

The partial enlargement of the pile boby,such as carrying plate and carrying branch,greatly improve the bearing capacity of the pile and make full use of the bearing capacity of the surrounding soil.

DX pile is a new cast-in-place pile which can improve the vertical ultimate bearing capacity of single pile by developing the capacity of bearing enlarging disk in the pile.

An analytical solution for bearing enlarging disk of the DX pile based on its actual bearing characteristic is presented.

By a static load experiment on DX pile, a test on axial force of pile body ,and a test and study on high and low strain force, the paper discusses load bearing characters and deforming failure mechanism about DX pile and states that most of load on DX pile is shared by resisting force at the end of load bearing plate.

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