You should contact your environtmental department of your local council to make a complaint about the noise. Normally planning permissions do not have a noise or working hours clause in them unless it is in a majorly built up area.
I remember living right beside the main Dublin/Belfast railway line and they would do nightworks all night with no planning permission required. I would be a nervous wreck after the weekends where they were carrying out repair work. I requested at least 8 hours advance notice where possible so that I could move out of the house to get some sleep!
The recommended hours for construction work are from 8am until 10pm Monday to Friday apparently, and from 8am until 7pm on the weekends. Although I could be corrected on that.