The results showed that the yield strength of composite depended on the shear strength at the weak boundary,which was determined by the boundary adhesion and the length,diameter and content of short fibre.

Determination of weak interface distribution range of concrete gravity dam based on reliability analysis;

In view of the two weak sections consist in the kind of new structure,according to the experiments,measures for shear and interface slip resistance through analysis of the specific location and forming causation concretely of the two weak sections are proposed,obtained good effects.

To ensure the stability of seashore cofferdam in which geotextile is used for filter layer, the following two factors should be considered in design, one is the seepage force caused by different water level between the outer side and inner side of the cofferdam, the other is the weak anti-slide interface between the geotextile and the upper covering gravel.