“Reach the SIVA-resurrected guns.”
Inside the Bunnker you have yet more Splicers that you will need to deal with. This does include at least one Splicer Reaver Captain. Otherwise, it is what is left from outside the bunker as well as the Dregs and Vandals that are scattered throughout the area. You will need to Destroy the shield generators to continue forward.
Once the shields are down, head on through the doorway that has opened up in the back wall of Bunker Triglav. Run on through the corridor and through the two room beyond it. Just follow the path forward and make your way out to the guns beyond it.