The main inducement to freeze-thaw damage of engineering rock mass is the frost heave and thawing shrinkage of moisture in rock

which is quite common in cold regions. The research on freezing rock can be mainly concluded to four parts

which are the physico-mechanical properties of freezing rock

phase transition process

the thermo-hydro-mechanical (THM) coupling at low temperature

the model of freeze-thaw damage and numerical simulation. During the last several decades

researchers have put efforts on freezing rock by theory analysis

numerical simulation

field test and laboratory experiments. Although remarkable achievements have been obtained

there is still long way to go in the field of freezing rock and plenty of researches have stayed in the stage of experiment. Research on frost damage of rock should base on microscale and take the water-ice phase transition as entry point. Furthermore the relationship between freeze-thaw action and crack propagation should be investigated

and extend to the influence of freeze-thaw action on the whole fracture network of rock mass.