The factors which influence head of tamping reamed pile s quality is analyzed through practical example of project,and measures in controling head of tamping reamed pile s quality is given.

A new screwed filling pile—screwed pile and its construction technique are introduced.

Ram-compaction piles with composite bearing base is an effective method to enhance the bearing force of the composite foundation,by u- sing the high bearing force of a pile,the characteristic of the pile s short,the enhance of the substitute ratio of the composite foundation.

This paper introduces the method of controlling the driven steel tube in application of the ram-compaction piles.

As a result,the ram-compaction piles have not only higher-load but also less down moving.

Difference exists in the base height of rammed enlarged piles between the model test and the calculated test.

Application of tamping pile foundation;