Gravel and concrete slab driveway retaining wall

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Old 08-09-11, 12:16 PM
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Question Gravel and concrete slab driveway retaining wall

I have a gravel driveway that is approx. 80' long. At the end of the driveway, in front of the carport, is a concrete slab that is approx. 30' long. It is a 90 degree turn and a approx. 3' high slope into the carport. Much of the gravel has washed away due to the high spot that is almost in the middle of the gravel section. When it rains it washes the gravel that is left towards the slab and then channels off into the yard. I would like to build a retaining wall along the side of the driveway and regrade it up to level with more gravel. My question is what "kind" of retaining wall do I need to build next to an existing concrete slab? Do I remove the dirt all the way up to the slab, build the wall close to it then backfill? I think the wall at it's highest point will be approx. 3' to 3-1/2'. Thanks!
 
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Old 08-09-11, 04:04 PM
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Some pics would help. It's not clear if the slab is rising as it gets to the carport or going down. Instead of building a wall, would extending the slap work?
 
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Old 08-10-11, 11:16 AM
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It's hard to explain and I can't get pics. I guess all i need to know is, if you needed to build a retaining wall next to an existing concrete slab, how would you do it? The slab is elevated on a slope of approx. 3 feet next to the carport.
 
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Old 08-10-11, 11:47 AM
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So you have a slope down from the driveway and you want to build a wall and fill in material to make a terrace above what is currently a slope? Am I getting the idea?
 
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Old 08-10-11, 03:02 PM
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The idea is to start the retaining wall below grade. Dig along the slab & set the block. I would probably put 3 rows below grade. Use type N mortar or portland cement mixed with sand between the rows of block.

Having said that, I think there is a better way to solve the water problem.
 
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Old 08-29-11, 07:54 AM
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The gravel portion of the driveway is sloped down towards the concrete section witch is also sloped down. The rain washes the gravel towards the concrete section and then out into the yard. I would like to build a retaining wall all along the edge of the driveway, built up above the driveway, then refill to level with gravel.
 
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