You can also go 2 Rax pressure. Build your Rax at 11 and 13 supply and push when your second Marine pops out with 3 SCVs and 2 Marines.
If they are expanding you build two bunkers so at least one survives.
Once your bunker is full with 3-4 Marines stop reinforcing and expand. Sometimes you are able to kill the expansion other times you are overrun by 10 zerglings. Either way you have done considerable damage as you delay your SCV production only for your 11 / 13 Rax but the Zerg has to make a ton of Lings and Drones just to trow them at your Bunker.
If you see a ton of Zerglings try to salvage your bunker and stutter step your Marines back until they die.
Build a new bunker at your expansion to be save from all ins.
MarineKingPrime and MakaPrime use this strategy a lot.
This build needs a lot of good micro.