THE ANALYSIS AND AMENDATORY MEASURES OF TEMPERATURE STRESS OF FACE SLAB OF A CONCRETE-FACED ROCKFILL DAM WITH EXTRUSION WALL

The interaction between the extrusion wall and face slab and a dam body itself is considered to develop a numerical method for the temperature stress of the face slab of CFRD and verify its rationality. The influence of the extrusion wall on the temperature wall of the face slab is then emphatically analyzed. The behaviors of the rockfill and soil-structure interface were described by Shen’s two-yield surfaces model and Tsinghua’s elasto-plasticity damage model, respectively. The 3D FEM analysis shows the temperature stress of the face slab with an extrusion wall and different filling materials between the face slab and extrusion wall. The method of decreasing the temperature stress of the face slab is brought forward and verified from the point of view of the interface between the extrusion wall and face slab. The results show that the extrusion wall have a negative effect on the temperature stress of the face slab. Different filling materials have rather different effects on the temperature stress. The filling materials like asphalt felt can decrease the temperature stress of the face slab.