Where groceries are concerned, you could buy them online and have them delivered to your home. All bills can be paid online as well. Remove her access to any joint account, OR transfer your funds to a separate account that she doesn't have access to. Obviously, she shouldn't have access to a vehicle.
I'm warning you though; these measures will get tiresome and won't really change anything. Your AW is probably going to borrow money from friends, family or neighbors, and will continue to drink. Addicts will do what addicts will do *until* they decide, of their own accord, that they've simply had enough and want a change.
The same goes for you. You can take measures to try to protect your finances, but in the end, you may decide that you've had enough and need to take more drastic steps to protect your children.
And I do very much agree with catlovermi...someday, your children may ask you why you "let their mother fall"...an appropriate response would be that you simply do not control her actions, only she does. On a daily basis, every time she reaches for a bottle, she continues to make the choice to endanger her children and her health by downing the booze. And that is clearly not under your control.