An engineering case is introduced to illustrate the design,construction and test of extruded-expanded bored pile with support tray.

Prestressed concrete reaction system for ultrahigh static loading tests of bored piles;

Study on load transfer mechanism of bored piles;

The design and construction method on improving the single pile bearing capacity of the bored pile in pile foundation project;

Applied example and analysis of grouting pile retaining wall on foundation pit support of old workshop;

Problems in construction of grouting pile with squeezing & expanding resistant plate;

Magnetic anomaly characteristics out of reinforcement cage in cast-in-situ pile;

Post-grouting technique around cast-in-situ piles in soft foundation of Wanghu Sluice;

The construction of cast-in-situ pile under complicated geologic conditions of beach s retaining wall;

Research on bearing behaviors and negative friction force for filling piles in the site of collapsible loess with big thickness;

The concrete operating characteristic influences the quality of concrete filling pile;

Analysis on the affecting factor of bearing resistance of filling pile;

The construction technology of rotary excavating core cast-in-place pile and the quality control;

Discussion on the reverse circulation drilling cast-in-place pile drilling technique;

The CAD system of deep foundation cast-in-place pile support;