Concerning the technology of constructing pumped-storate stations of a new design

Conclusions

• 1. The technological methods of sinking underground structures under the effect of their own weight recommended by the building code and those traditionally used (and also the recommendations on eliminating tilting and sticking) do not provide the normal occurrence of the sinking process and do not preclude the possibility of failures.

• 2. Reliable control of the process of sinking drop shafts can be accomplished by using the external active (adjusted in magnitude and place of application) forces, by using a jack-cable system with simultaneous control of the stress-strain state of the drop shaft (stresses in the concrete, reinforcement, pressure under the cutting curb, skin friction of the curb part).

• 3. Construction of deep underground structures should be carried out in two and more stages with the use of reliably controlled jack-cable sinking systems.