I don't remember a blue wall up, and I just finished that quest 2 days ago.
Need moar better info.
Yeah I'm a bit confused....the only "Blue lazer walls" are on the outside of the building ( I believe, and just for the record they are offically called "Enclave Photonic Resonance Barriers")
OP if you are in the tunnel......just keep going through, I don't see what the problem is :shrug: