Level 10, eh? Let's take a Half-Orc Barbarian 8/Fighter 2 for simplicity's sake (I'd say Barbarian 10, but I need more feats).
Enter damage multiplication feats: Battle Jump (double damage on a charge where you drop on someone - easy with a good Jump check), Headlong Rush (double damage on a charge), Shock Trooper (so you hit every time on a full power attack).
Also, take the Lion Totem (full attack on a charge) and Whirling Frenzy (flurry-like extra attack on a full attack) Barbarian variants.
All that lets you take three attacks at +8/+8/+3 base, even with a full -10/+20 power attack, since Shock Trooper lets us shuffle the attack penalty to AC.
Assuming Str 30 (base 20, +2 through levels, +4 rage, +4 Bull's Strength or Belt of Giant's Strength) and a magic weapon +2, we're looking at +20/+20/+15, or a good likelihood of two-ish hits on most level-appropriate encounters before further buffs/magic gear.
Assuming a +2 Glaive (reach weapon is good with Headlong Rush), we're doing 1d10 + 17 base damage, or 1d10 + 37 with full Power Attack. Each damage roll is taken times three (Battle Jump doubles it, Headlong Rush does it again, D&D multiplication logic applies...), so we're doing a nice round 3d10 + 111 damage with each hit. Let's assume we hit at least twice, and you see where this is going. Should you get your hands on a Valorous weapon, you're even better off, since that adds another x2 to the whole package. And don't get me started on the odd crit, or a simple Haste spell from your friendly arcanist, or any number of other options.
Oh, and your AC is really bad for the rest of the round, but with a little bit of luck (and one or two of the baddest bruisers already lying at your feet in rapidly spreading pools of their own blood), you should be OK.
Not a build for the faint of heart.
EDIT: Noooooo! Ninja'd by the Hood!!!
couple problems with this... first, power attack only applies to base attack bonus(str does not apply). so only a max of 8 could be shuffled over to damage. and only one attack can be taken in a charge. so your 3 attacks of 3d10 + 111 is considerably less. still able to do alot of damage but not nearly as much as what you were thinking.
i'm not versed with barbarian builds but charge and power attack are core and pretty straight forward. let me know if im wrong, thx for the idea though. my buddy likes playing a barbarian and some of those feats would do nicely for him.