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Pervious Driveway
2

Pervious Driveway

Pervious Driveway

(OP)
Hey there. I am sneaking over here from the Structural Engineers forum.
I am building a house and am running up against the impervious surface limits due to the long driveway. Looks like I need to make it pervious. Seems like there are a lot of systems out there for this purpose and are expensive.
Could I not simply scrape down about 6" and put a layer of surge stone down and then cover it with #67 or 78M washed stone?

Thanks

RE: Pervious Driveway

with edge protection, it would likely work... can you look into using pavers to see if they are OK?... can you look into pavers (with a void) that you can use to grow grass in?

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

Agree with dik....permeable pavers with or without the grass void can be used. The key is reducing runoff, which essentially any paver will do; however, the permeable ones are specifically designed to allow some percolation into the underlying soil.

Pay attention to the details of the subgrade. Make sure your graded aggregate base has at least a reasonable permeability otherwise you'll trap water at the paver interface and pump the interlock sand back out.

RE: Pervious Driveway

(OP)
Thanks Ron and dik.

I am trying to make this cheap and not use pavers. Just a surge stone base (3" diameter +/-) with smaller washed stone on top. Is there any issues with that?

RE: Pervious Driveway

your washed stone should be well / dense graded material. if it is uniform / gap / open graded material, it may not be stable and would rut.

RE: Pervious Driveway

Quote (I am trying to make this cheap and not use pavers.)


Can you just use 1" clean crush? What's the soil like underneath... if clay or something of that ilk you might want to include a geotextile.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

(OP)

Quote (CVG)

your washed stone should be well / dense graded material. if it is uniform / gap / open graded material, it may not be stable and would rut.

That is why I would only use a few inches on top of the surge. Been there done that.

Quote (dik)

Can you just use 1" clean crush? What's the soil like underneath... if clay or something of that ilk you might want to include a geotextile.

Do you mean crusher run? Not allowed as it is considered impervious.
Just talked to a local Geotech. Thinks he will approve my idea for the town.

RE: Pervious Driveway

In time that open graded material will eventually plug. Without positive surface drainage, I'd live with it as is.

The crud comes from nearby surfaces with the rainfall entering the road.
So grass grows and then little flow to speak of. Fabric below may help, but little.

RE: Pervious Driveway

Clean crush... 100% passing 1"
1% passing 3/4" sort of grading... needs good angularity to keep from 'moving around' like marbles...

@OG:

Quote (In time that open graded material will eventually plug)


That's why I suggested the geotextile filter stuff...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

How about two concrete strips like they did 80 years ago?

RE: Pervious Driveway

(OP)

Quote (Phil1934)

How about two concrete strips like they did 80 years ago?

Thought about that and still might do that for some. The parking areas are what is killing me.

RE: Pervious Driveway

Have you considered pervious concrete? If it were my driveway that would be my preference.

RE: Pervious Driveway

I understand that eventually pervious concrete becomes impervious concrete...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

Pervious pavement, whether PCC or HMA, has to be vacuumed regularly so it doesn't clog.

My glass has a v/c ratio of 0.5

Maybe the tyranny of Murphy is the penalty for hubris. - http://xkcd.com/319/

RE: Pervious Driveway

maybe road residue and stuff that doesn't readily respond to the 'dirt sucker'... I think that over time it clogs.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

Does amount of traffic impact how quickly it clogs? I imagine a parking lot for a shopping center would clog way before a private driveway for a house. Or is it less traffic related than I am imagining?

RE: Pervious Driveway

I don't know for sure, but I'm pretty sure it's largely related to traffic density. Grime from the street, tire wear, etc.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

I'd check locally to see how any pervious pavement is behaving. I'd not put any reliance on high voids in any driveway with grass and other plants nearby. One way to eventually have a grassy driveway.

RE: Pervious Driveway

which is nice... you can actually purchase pavers that have this intent.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Pervious Driveway

My driveway was in a bit of a slope so I used plastic lock together "geo grids" then filled it with 15 to 40mm stone.

Works great.

But it doubles your cost in stone and you really need to get the grids flat.

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