SBB causes huge noise by doing night work

I am resident on Ohmstr, direct on the Oerlikon railyway station.
The SBB has been constructing the rails since march this year.
Since last two weeks (from 23.8.2013), SBB started renovating the rails in the night ( Gleise 5+6 ). From 22:00 - 06:00, the workers heavily worked on the construction sites emitting huge noises (drilled the grounds, cutting irons).
The night work disturbs my normal sleep heavily and harms my health.
When I contacted the SBB, the answer is that the emission threshold is hold and no compensation is possible. Besides, they say they want to continue the work until 2014.
I understand some work of SBB have to be done during night for safty reason. However, as residents, I don't want to bear the noise voluntarily. Now for sake of my health, I have to spend further time looking for new room now and move as quickly as possible.
What a pity for an individual resident, helpless infront of SBB!