Taking the elevator shaft structure in a high arch dam as for the study object,the paper analyzed the elevator shaft structure with different connection methods with the arch dam uner the corresponding operating conditions,the regulation of stress-strain for the elevator shoft structure.

Local dewatering treatment of elevator shaft in deep foundation pit works;

Drum formwork construction technology of elevator shaft;

Two methods of changing staircase shaft into elevator shaft in building renovation are introduced.

In this article, authors compare three usual construction methods of boiler elevator well frame, introduce advantages of the combination unit method in practical construction, and simply state this method.

Study on the coated cemented carbide with gradient structure by a special sintering technology;

Coated cemented carbide with gradient structure;

Effects of carburizing process on gradient structure and hardness of WC-Co gradient cemented carbides;