The results showed that: Flexible slab bridge to better co-ordination Units and bad settlement of the embankment, in order to eliminate the phenomenon Bump; ecological flexible wall is a new type of retaining structures, with green walls, landscaping features, the use of the effect of good.

On the basis of analyzing and generalizing the jump at back of abutment in loess area, the treatment technique of the Wedged-shape Flexible Approach Slab was put forward in the paper.

Application and study actuality of geocell ecotypic flexible retaining wall;

Application of geocell to strengthen expressway subgrade in desert;

Finite element analysis of shallow saturated loess reinforced with geocell;

Application of geogrids to flyash foundation treatment and ash dam heightening;

Study on the Capacity Mechanism and Model Test of Geogrid Mattress and Gravel Pile Composite Foundation;

Application of geogrid in consolidating subgrade bed on existing railway and its tests are described with specific project.