Three check-up experiments including drying shrinkage,autogenous shrinkage,elliptical ring restraint were designed to investigate the effect of mineral micro-expansion agent,shrinkage-reducing agent and silica fume on volume stability of cement-based materials and their mechanisms.

Based on the results of FEM calculation,comprehensive crack control methods are adopted in the design of the basement,which include prestressing technology,two-layer welded steel fabric technology,and microdilatancy waterproofing agent utility technology of concrete.