Static pressure and dynamic impact characteristics of filled jointed rock after frozen-thaw cycle damage

In the construction project, rock mass is often destroyed from joint plane, and jointed easy to be eroded by freeze-thaw environment. Therefore, damage mechanical properties of filled under action are very important for disaster prevention, engineering safety evaluation reinforcement. order research effect cycle on deterioration characteristics rocks, prefabricated samples tested with different numbers cycles temperature range -20°C~20°C. Then wave velocity test, static compression test SHPB impact conducted after freeze-thaw. Based results, change regularity degradation, dynamic rocks were analyzed. The results show that velocity, compressive strength all a downtrend increase number cycles, each parameter positively correlated filling materials. Among them, decrease in sample 30 greater than 30%, loss peak exceeds half its initial strength. strain rises exponentially while does not clear trend. about 1/10 1/5 strain. Under same action, lower material, more serious damage.