The study of rock-socketed pile side resistance character;

This paper has expatiated follow things:obtaining of pile side resistance;ingredient of impacting pile side resistance;pile side resistance strengthen effect and degradation effect which discovered in some home and oversea datum.

Based on the model test and engineering practice, the basic rule of pile side resistance enhancement has been summarized.

Research on interaction between resistance at pile and lateral resistance of pile;

Based on the field test results of uplift bored piles for a deep-embedded 500 kV underground transformer substation in a coastal city,the uplift behavior of under-reamed bored piles and bored piles with pileshaft post-grouting was studied.

Study of pile shaft resistance is a key point of the research on the pile bearing performance.

This paper elaborates a new theoretical problem on the behavior of piles under load, namely, the influence of soil strength underneath a pile on pile shaft resistance.

So far, more and more scholars have been attracted by the phenomenon, that character of soil under the pile toe has influence on the development of pile shaft resistance within a certain scope near pile toe.

The behavior by top loading and the partake scale of shaft resistance and end resistance are analyzed in the pape r.

According to the analyzed results of twelve dynamic loading tests on rock\|socketed piles,the behaviors of shaft resistance of the socket and toe resistance are discussed,a relationship of shaft resistance of socket to the length of socket and the rock strength and the construction of piles is presented.