Chemical mechanism of strengthening and study design bored pile with post pressure grouting

On basis of expounding chemical mechanism of strength of bored pile with post pressure grouting,set forth the engineering characteristics of this kind of pile,its role of improving engineering properties and the great increase of loadbearing capacity.Based on Technical Code for Building Pile Foundations (JGJ94-94), some aspects in the design of bored pile with post pressure grouting and its economics are discussed.