Reinforced concrete rubble is just a dangerous tangled mess, and not good for much until to use a torch to cut it apart. You will need a crane and some heavy haulers, unless you have enough fuel for several dozen torches running non-stop to parse it into pieces small enough for a crew of civilian workers to manhandle.
http://www.indygov.org/eGov/City/DPS...e-obstacle.jpg
Talking about all that ash has got me to thinking about serious respiratory illness as well as the inevitable blood poisoning from the innumerable cuts and scrapes. You might need to 'recruit' some more 'civilian workers'.