The main objective of this study is to investigate the effect of hydropower plant operation on
the long-term stability of unlined pressure tunnels of hydropower plants in Norway. The …

For low construction cost, the hydropower plant with multiple units sharing a common tunnel
(HPMUST) has been widely used, which plays an essential role in the short-term scheduling …

Highlights The fully encapsulated bolt is prone to stress concentration, which leads to the
bolt breaking suddenly. Energy-absorbing bolt adapted to the large deformation of …

With the rapid development of urban underground space, the construction of shield-driven
cross-river twin tunnels is increasing, and the complex hydro-mechanical coupling effects …

Frequent pressure transients are identified as the cause of block failures in many unlined
hydropower tunnels. The primary design objective of such tunnels is to prevent hydraulic …

Glacial ripping involves glaciotectonic disintegration of rock hills and extensive removal of
rock at the ice-sheet bed, triggered by hydraulic jacking caused by fluctuating water …

The joint pore pressure inside rock mass significantly affects groundwater bursting. To
investigate the couple effect of joint pore pressure and joint orientations on rock strength …

Unsteady internal water pressure (UIWP), such as water hammer and mass oscillation (rigid
column effects) induced by load regulation of hydropower plants arranged with surge tanks …

The frequent pressure pulsations due to hydraulic transients in hydropower plants induce
cyclic loading on the rock mass that may contribute to increased instances of block falls and …

Regulated hydropower is currently the most capable load balancing technology for the
future renewable energy system which will be characterized by a large share of unregulated …