This article describes the features of DX piles and summarized the advantages and disadvantages of these piles from the application of them to the pile foundation of highway bridges in Hebei Province.

By setting several bearing plate and branch in deferent location of pile body,squeezed branch pile can improve bearing load capacity of single pile,shorten the pile length,lower cost of pile engineering.

To ascertain the feasibility and serviceability of the squeezed branch piles in Nanjing,authors have took in-site pile tests.

Combing construction of cast-in-situ pile with expanded branches and plates of Zhangzhou Sewage Treatment Plant,the author studies mechanism of action and bearing capacity behaviour in cast-in-situ pile with expanded branches and plates.

This article shows that the cast-in-situ pile with expanded branches and plates is more economical than other kinds of pile by introducing the design and application of cast-in-situ pile with expanded branches and plates in a certain engineering project.

According to the characteristics and distribution of earth fissure in a high-rise residential building district,the DX extruding-expanding multi-brace-disk pile is used in the high-rise apartment in the upper plate of the earth fissure,so the problem that the usage of long pile is not permissible.