Crate her! Not only is she damaging your furniture...she may do herself some harm chewing on these things.
Do you know how much a surgery costs if she gets some sort of obstruction from this chewing??
She also sounds bored. How much exercise does she get before you leave her for work? She needs a good brisk walk and some playtime. What do you leave her to chew while alone?
Crate her, and give her a Kong filled with PB and goodies or a bully stick...something to keep her occupied. Exercise and walk her when you get home, and do some training also. Is she in obedience classes.?...a tired mind also makes a tired, sleepy dog that does not have the energy to chew.
Gina