By analysis of foundation excavation calculation with all borehole data, the anchor pile support design is rejected, while the combined design of sparse pile support and neighboring pile-steel pile support with different segment is brought out with consideration of geological condition.

Application of compaction pile in soil reinforcement of abutment backfill;

Monitoring analysis on soft base lime-soil compaction pile of one arch culvert in Dayun Highway;

Plastic analysis of closely compacted pile in tamping processes;

0,three-dimensional finite element simulation of closely compacted pile during the hole formation has been done.

The application of treatment soft foundation by shallow-dense sand piles on the river bank;

Based on the analysis of the liquefied mechanism of saturated sand,this paper analyzes the effect of three measures such as compacted sand pile,vibro replacement gravel column and bag sand-well.

This paper comprehensively introduces the principle and the role of compacted sand pile in the reinforcement of the soft foundation based on the construction of the second contract section of Bao-Xi Railway,and describes the existing problems and their solutions.