Fill In Close Quarters

DSPconstruction

We excavated the first 15 feet of a 35 degree hillside behind a retaining wall to drill for caissons. I am now at the point of replacing the hillside but the fill goes right up to the wall and there is no access from above. Any ideas on compacting in such a tight location? Thanks.

tgeb

I am having trouble picturing this.
Do you have any photos you could post or explain it more?
What kind of access do you have from low side?

Off the bat I am thinking of one of those remote controlled little ram-ex sheepsfoot rollers. You can stand at the top and run it up and down the slope, not have to worry about an operator getting hurt if it flips.

Any more info you can provide?

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Tom

www.gebcon.com

dayexco

i need pictures, access, etc...got any?

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someday, i'll be as patient as Nick.

BeetsZ71

What about using some geotextile fabric and some 1 inch clean rock and possibly some gravel shooters. 1 inch clean rock is generally considered self-compacting (they use it as backfill against commercial building foundations). Gravel shooters is expensive but sometimes you can't place rock or dirt without them.

DSPconstruction

Don't have the pics with me but here is a little sketch

We have access from one side
The sketch shows the side from which we have access.

On the job we have a case backhoe with buckets and sheepsfoot and a 770 bobcat with combo bucket. Two jumping jacks and a compressor with tools.

I was looking at the boom mounted compactors, the biggest problem I see is the fact that we are not at the right angle to be able to use it properly. (coming from the side rather than top or bottom)

DSPconstruction

I guess I should add the picture too....

Attached Thumbnails

 

ShawnIUOE132

The way I see it if you have one way in you can compact this with a backhoe boom compactor, we have one for our JD 310 SE backhoe. I would put as many lifts in as I could level starting at the far end. I would place and level the lifts with the bobcat. After your lift has been put in place I would back the backhoe in with the compactor and tamp away. Once you start getting to your finish grade elevation or originial slope you can adjust your outriggers on the hoe to tilt your machine abit for compacting. On our compactor it has rubber bushings when you apply down force the plate lays with the angle of the slope. These plate compactors are great for making hillsides look pretty, by sideswiping with them. I would say 10 or 15 foot at a time so you have a safe level area to set your rubber tired backhoe to do it's compacting. Remember work your way out. Good luck!

dayexco

i would think the first foot out from the basement wall for the full height of the fill, there should be like a pea rock, or a 3/4" - rock. even with the weight of the house on there, if you compact that fill immediately up against that wall, is there a chance that you will bow it? just a thought. by having that foot of rock there, i think it would relieve some of the pressure being applied being applied to the wall.

__________________
someday, i'll be as patient as Nick.