Through the calculation and analysis of settlement occurred at plate-pile foundation of storage tank, the simple and effective method was established for the similar settlement calculation, by which the possible settlement occurred in the similar engineering project can be evaluated correctly.

Based on the theoretical model of bearing mechanism for pile_supported round slab foundation for chimney, a "ring_beam" calculation method for bending capacity is established.

With more and more super-length concrete structure buildings with the pile foundation have been constructed, the temperature stress of super-length concrete structure has become one of vitally important research topics in structure design This paper elaborates the reason of cracking, and the related theory of pile lateral direction stiffness.