A B C Slot Cutting For Recompaction.

MC Excavating

Does anybody have any experience with A B C slot cutting for re-compacting soil near a property line? I have no experience with this technique and was wondering if anybody had any advice. I'm probably just going to ask the soil engineer how he wants it done, but I just wanted to see what you guys thought about it.

This is for a small shopping center with 10 small stores. I need to re-compact 5 to 8 feet deep and 8 feet out from the perimeter of the foundation. The only problem is that the back wall of the shopping center is directly adjacent to the property line wall, so I cant re-compact 8 feet past the foundation in the back because thats someone else's property. So thats where A B C slot cutting comes into play per the specifications of the soil report. This type of compaction is kinda like underpinning footings. You can only do a couple of section at a time.

Now each slot can only be 8 feet wide and some will be as deep as 8 feet down. I must maintain a maximum cut bank of 5 feet high and a 1 to 1 slope on anything over that 5 foot cut per OSHA safety standards.
So imagine measuring every 8 feet along the back wall and making each 8 foot section a slot like this.

==========WALL=======WALL==========WALL=========
| A | B | C | A | B | C | A | B | C |

So when you cut out all the A's, B and C will shore the wall up until you re-compact all the A slots. Then do all the B's and so on.

So whats the best way to do this?

Should I cut the bottom out of the building area and then re-compact each slot or just dig slot pits and re-compact, then re-compact the rest of the building area?

Do I need to re-compact the dirt in level / flat lifts or can I re-compact them on a slope / ramp?

I'm sure the soil engineer will tell me how it needs to be done but what do you guys think?

I have experience in compaction just not this slot cutting technique. If you need more info just ask.

denick

Gee MC!

Do you guys in CA need to make everything complicated? It's too much to even invision! Let us know how you figure it! Send a lot of pictures! If you get the job.

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

jmic

Nick,
You mean you don't know your A,B,C's. Thats childs play.

__________________
___"Remember You Never Get A Second Chance To Make A First Impression"______________________
Joe

denick

Joe when I was a kid it was A'a B'a C'a, capisce!

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

MC Excavating

Anybody out there with some advice?

denick

MC,

I have been thinking about it and I hope you don't think we have ignored you. It's hard to imagine the layout. Got a picture? I seems that you just need to size the equipment to the slots for reach and room. You would need to compact flat layers I would think or your not getting even compaction.

More after dinner.

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

jmic

You all go ahead and laugh but why couldn't you just flood the area with water and let that compact the soil? what kind of compaction you looking for? Is it under parking or driveway area? Please explain further.

__________________
___"Remember You Never Get A Second Chance To Make A First Impression"______________________
Joe

denick

MC,

Joe kind of hit on it.
1. Why does this need to be done?
2. What is it trying to accomplish being done this way?
3. What is the construction of the foundation? Is the foundation in
good shape or having trouble?
4. Is there only 8' from the building to the property line?
5. What is the property line? a fence? wall? open space?
6. Is your only access from each end? basically an 8' wide alley?
7. Is the existing soil known to be compatible?
8. Have they specified the equipment type to be used?

I'm sure I am not clear on the project but it seems challenging.

You being on the opposite side of the world I'll try to check back later or in the morning.

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

denick

MC,

How is this project going???

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

MC Excavating

This is a job we bid on. I dont know if we got it or when we will start, but I bet we got it and I hear they are eager to start. Cost $42,000 for recompaction. About 2 to 3 weeks of work. If we get the job, I will take alot of photos and teach you guys all about A B C slot cutting.

denick

MC,

I've been curious,

Did you get the job?

How did it go?

Any pictures?

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

MC Excavating

Don't know if we got the job yet. This GC will usually give us like a weeks notice to start or tell us "that jobs ready to go" and call us to actually start 2 months later. Hes kinda strange like that but we get every job he gets and he always pays. He doesn't get other prices for site work. Hes just to busy. He trusts that we have good numbers and that we always do a good job. He doesn't have superintendents on any of his jobs. He only hires subs he can trust and that don't need a baby sitter.

Do any of you guys have customers like this?

denick

MC,

Great to see you around. How are things going in Ca.? work busy?

We don't work for many builders. The one's we do work for have us doing there work because we only ask a four things.

A known elevation.

Two Known points.

The correct measurements to do the job.

And payment within two weeks of our billing.

This last fall we picked up a builder who has been in this area for a long time. Has a good reputation and a good amount of work. We were working on some stone setting and he was building a tea house. We had introduced ourselves and had some discussion. When we were about done he came over and said he was going to build a house for himself and would we consider doing the site work. It happen to fit the schedule so we said yes. He asked how we worked and I told him what I listed above. He laughed. He said he would be on site for the first week to give direction. He stayed 3 hours the first day and an hour the second day. He left a note with my operator saying "you guys are low maintenance. No need for a baby sitter, call me when you need something. Fax me the bill when you need more" and left a check for $7,500.00 as an unasked for deposit. He paid every bill within 2 days. We did $80,000.00 of site work on that project.

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

MC Excavating

Things are going great here in CA. It has been a very dry winter so far. Even when it did rain it wasn't enough to stop what I was working on or it would just blow through over the weekends. It seems like we are getting a decent storm tonight, but still no down time. I have 3 days of work indoors digging machine pits / large footings in a commercial building for some very large printers (3 pits - 11' Wide x 60' Long x 2.5' Deep). Bring on the rain!

denick

MC,

Be careful what you say!

__________________
Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

Driftwood

I'M in Marin Co. and do a lot of retaining walls. Because of our seismic area Geo techs. rule. Started back East over 40 years ago.

Rest of the country has little idea of our requirements. It's easy to have a $100,000 in the found. alone! The simpson hardware alone ,is a big deal.
Like they say in hilly Marin Co. You may come home some nite, and have Your house come down the hill to greet you!

Driftwood

Last driveway with new 70 ft retaining wall ,This is what the geo tech. had me do. remove soil from a small area at a time, spread out ,water down, replace,
recompact with sheeps ft. vibratory compactor. Then I passed with the nuclear tester. Hope You bid high! This whole project was T+M . I
realize not everyone can do this. I seem lucky in selling a lot of My work this way. P. S. Our projects are all Res., not Comm.

John K

MC,

How did this turn out? What kind of soil?