settleing concrete flatwork fix?

[cbc58]

this is abit off topic for these boards but hopefully someone may know a solution.

i have a number of areas in my driveway and walkway where the concrete flatwork has settled and i'm looking for a fix.  other than pouring on top of it or removing the areas and repouring... what can be done?

i live in a slapped up subdivision where the builders really didn't really care about what happens after their builder warranty ran out and it's beginnig to show.  all my neighbors have the same problem and it's criminal.

any suggestions to raise settled concrete flatwork?

[PEG688]

 Slab jack :

  http://www.crackman.ca/Default.aspx?PageId=1023

Find one in your area.

Most home remedy's won't work. In fact even these guys work may be temporary, the base needs to be done right , proper compacting materials used for back fill etc. If the base is crap , the slab will MTL re-settle. 

G/L PEG