I'm having a hard time deciding what to do with the base aggregate for a retaining wall build.
I've dug a trench about 18" deep. I put in my base aggregate which is 2A limestone. This material is considered road base. It has crushed stone ranging from dust, up to 1.5". It compacts well.
I was able to install about 25% of the base wall units a couple weeks ago. Then, the weather turned to rain every other day for 2 weeks. My trench was filled with water.
It's now been dry for a couple days and shouldn't rain for awhile. The water level in the ditch never went down. It's been cold and our soil is all clay. I pumped the water out and found the base material is saturated to the point that it is "pumping".
I've read that clean stone such as #57 can be used as a wall base. I have 20T on site as I intended to use it as my drainage aggregate. I'm considering removing the road base and using the clean stone since it will not be affected by the water. However, it makes me think that all the water will then be stuck under my wall in the ditch I've dug in the clay.
Should I remove the wet road base material and reinstall the same, but dry? Or should I go with a clean material with no fines in it? If I do that, what keeps the sub-base soil from being saturated?
All the retaining wall details I've seen show a drain pipe behind the wall at grade level. If you used a clean material it seems that you should be installing the drains at the sub- grade.
I'll be using versa lok standard units.
Project location is Pittsburgh, PA.
Existing soil is all clay.
Wall will be "L" shaped, approx 25' each leg. Approx 4.5' above grade.
I've dug a trench about 18" deep. I put in my base aggregate which is 2A limestone. This material is considered road base. It has crushed stone ranging from dust, up to 1.5". It compacts well.
I was able to install about 25% of the base wall units a couple weeks ago. Then, the weather turned to rain every other day for 2 weeks. My trench was filled with water.
It's now been dry for a couple days and shouldn't rain for awhile. The water level in the ditch never went down. It's been cold and our soil is all clay. I pumped the water out and found the base material is saturated to the point that it is "pumping".
I've read that clean stone such as #57 can be used as a wall base. I have 20T on site as I intended to use it as my drainage aggregate. I'm considering removing the road base and using the clean stone since it will not be affected by the water. However, it makes me think that all the water will then be stuck under my wall in the ditch I've dug in the clay.
Should I remove the wet road base material and reinstall the same, but dry? Or should I go with a clean material with no fines in it? If I do that, what keeps the sub-base soil from being saturated?
All the retaining wall details I've seen show a drain pipe behind the wall at grade level. If you used a clean material it seems that you should be installing the drains at the sub- grade.
I'll be using versa lok standard units.
Project location is Pittsburgh, PA.
Existing soil is all clay.
Wall will be "L" shaped, approx 25' each leg. Approx 4.5' above grade.