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Old 07-27-2015, 05:13 PM   #1
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retaining wall help


i have a retaining wall around the area where my pool is located. It varies from 3' to aprox 10' in height. It is block retaining wall hollow core. It was constructed 5 years ago. It had drains put along the base behind the wall and backfilled with gravel.
Since it was constructed, in various places, the wall has been pushed out from the top I assume from lack of drainage or just too much water for the drains to handle along with freezing temps in the winter.

I have been taking the tops off and inserting some rebar in the cores then filling them with concrete. While this has seemed to stop the progression I fear it may need more work. I notice the walls in certain areas stay wet days after a rain.

I was thinking about drilling some holes where the wet spots are to relieve the water from those spots and divert the water from behind the wall.

Does any of this sound like a good idea or what advice can anyone give. I will take some pics and post later. Thanks for any assistance
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Old 07-27-2015, 07:28 PM   #2
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here is a a pic of most of wall It just rained here so never mind the wet blocks
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Old 07-27-2015, 07:31 PM   #3
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here are just some other views
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retaining wall help-crack.jpg   retaining wall help-eastwall.jpg  
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Old 07-27-2015, 07:34 PM   #4
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First one is an actual shift location. It did the shifting prior to me core filling the blocks with rebar and concrete.

The second pic is where I see water for days after a rain. Again, it just rained here so walls are wet. I tried inserting text in general location where it occurs but idk if it will show up
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Old 08-05-2015, 08:03 PM   #5
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ttt anyone
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Old 08-05-2015, 08:18 PM   #6
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Ayuh,..... Drive a 3/4" pin through the very bottom, where the wet spots are,....

If there's water behind it, it oughta flow out,....
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Old 08-05-2015, 09:40 PM   #7
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The job wasn't engineered properly if the wall is moving this soon.
The filling and rebar are a stop gap measure. Unitizing the wall will probably mean it will fall in mass as opposed to breaking in sections.
You'll have to pull it down(or excavate behind it) and have someone who has a better idea of hydrostatic pressure, and how to compensate for it, do the repairs.
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Old 08-05-2015, 10:36 PM   #8
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Quote:
Originally Posted by Ron6519 View Post
The job wasn't engineered properly if the wall is moving this soon.
The filling and rebar are a stop gap measure. Unitizing the wall will probably mean it will fall in mass as opposed to breaking in sections.
You'll have to pull it down(or excavate behind it) and have someone who has a better idea of hydrostatic pressure, and how to compensate for it, do the repairs.
That's what I was thinking but just grasping at straws for a fix. I think I will try and drill weep holes to at least prolong doing a major repair. due to water drainage on my lot, I am not sure how to repair fully but hopefully can avoid tearing down wall for a while. the core filling has stopped progression for now at least. hopefully the weep holes will prolong longer
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Old 08-06-2015, 12:19 AM   #9
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Any of these.?

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Old 08-06-2015, 08:20 AM   #10
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It does have a drain and is backfilled 100% with gravel but no deadman installed. The way the slope of the yard is I think weighs heavy on the problem and I found out when they dug the pool that there is a slab of limestone rock about 5 ft down from the floor of the wall so water has to go somewhere and I guess that its just an enormous amount for the way the wall was built to handle. IDk
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Old 08-06-2015, 02:48 PM   #11
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You mentioned: "It had drains put along the base behind the wall and backfilled with gravel."

Where to the drains drain to?
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Old 08-06-2015, 08:27 PM   #12
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You mentioned: "It had drains put along the base behind the wall and backfilled with gravel."

Where to the drains drain to?

If you look at the first pic, the drains go out in two places( not shown but will try to explain by looking at the pic). As the wall gets shorter on each side in pic, the drain runs behind them until they come out on ground. The wall gets about two foot off of ground eventually
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Old 08-06-2015, 10:39 PM   #13
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Can you give a picture of the other side of wall.?
That's a nice area to spend some time...
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Old 08-06-2015, 11:03 PM   #14
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Can you give a picture of the other side of wall.?
That's a nice area to spend some time...
I can take one this weekend. basically it's gravel up to a foot or two to the top
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Old 08-07-2015, 07:02 AM   #15
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Quote:
Originally Posted by erbowman View Post
If you look at the first pic, the drains go out in two places( not shown but will try to explain by looking at the pic). As the wall gets shorter on each side in pic, the drain runs behind them until they come out on ground. The wall gets about two foot off of ground eventually
Does any water come out during/after rain? It may not be groundwater pushing your wall over.
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