Ground washing out from under patio

[Matthew Defore]

How would you guys handle this problem? As you can see, the ground is washing out from under the patio.  For now, I have a scissor jack supporting it from underneath.  However, even without the scissor jack and the bricks, the patio does not move when you stand on the edge of it. 

I have an appointment with one of those foaming concrete companies to give it some support underneath it, then I would like to build a series of 12"-18" retaining walls stepping down from the patio to get rid of the slope, and hopefully the washout. 

Any ideas?  Is there a way that I can get ahold of some foaming concrete product myself? 

[Matt R.]

I think the foam/mudjacking idea is good to start with.

Have you been able to look at this area of the house when it's raining hard, preferably during the day?  Maybe cleaning out a gutter, or adding a gutter where there isn't one now, can help.  Something had to wash away all that dirt.

This might be what you're already talking about, but hHow about building a short retaining wall along both edges of the patio?  From the column at the left, to the corner of the patio, around the corner, and back to where the ground rises up again at the right.  If you decide to do that, make sure you talk about it with the foam people.

[Matthew Paul]

Support the slab , then dig a footer around the outside , pour the footer , then lay some block to hold the slab . Then regrade the area around the slab and correct the drainage issue