The thickness of strengthing course is determined by controlling the deflection difference and the fatigue damage of the strengthening course, and by using the specifications for design of highway asphalt pavement.

The finite element method is utilized to analyze the mechanics states of the AC overlay on the concrete pavement, which is emphasized on the shearing stress and the deflection difference at the joints between two slab edges induced by vehicle loads.

The deflection difference at the joints between two slabs can be used to control this mode of distress.

The Theoretical Analysis on Pavement Deflection versus Roadbed Settlement;

Analysis on influencing factors to deflection of slab with cavity;

Analyis of deflection and compressive strain on the surface and the subgrade of flexible pavement;

According to investigation, dynamic penetration test, core analysis and deflection test,the relations between the troubles and climate, thawing of permafrost under the embankment, load-bearing capacity of foundation, material of pavement structure layer are discussed in this paper.

Research on the compactness connected with deflection value in highway enginnering;

Combined with the practice,the paper discussed the importance of detection rebound deflection value for county road reconstruction.