Digging Holes - Excavation & Site Work - Contractor Talk

Digging Holes

 
Thread Tools Search this Thread Display Modes
Old 07-26-2016, 03:21 PM   #1
Registered User
 
WAbrothers's Avatar
 
Trade: GC
Join Date: Jul 2016
Posts: 4
Rewards Points: 8

Digging Holes


Howdy,

I need to dig 9' holes for light pole bases. The deepest I've ever gone was 4'. I would use an auger with an extension but whoever did demo to the building that this lot stands on did not completely demo the building underground. There's a lot of bricks and concrete mixed in the dirt. I feel like the auger wont work.

Has anyone excavated a larger hole, inserted the sonotube then back filled while compacting?

Thanks,

Woj
WAbrothers is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

   

Advertisement

 

Old 07-26-2016, 06:08 PM   #2
Pro
 
slowsol's Avatar
 
Trade: Estimator / Preconstruction Manager
Join Date: Aug 2005
Location: Toledo, OH
Posts: 2,572
Rewards Points: 2,248

Re: Digging Holes


Yes. All the time.


Sent from my iPhone using Tapatalk

Advertisement

__________________
-John
slowsol is offline  
Old 07-26-2016, 07:25 PM   #3
Pro
 
hdavis's Avatar
 
Trade: remodeling
Join Date: Feb 2012
Location: CoastalME
Posts: 23,738
Rewards Points: 3,946

Re: Digging Holes


Cali pointed out that some seismic zones may not allow it - other than that, tamping and filling is done all the time.
hdavis is online now  
Sponsored Links
Advertisement
 
Old 07-26-2016, 09:14 PM   #4
GC/carpenter
 
Calidecks's Avatar
 
Trade: Decking, Railing, Carpenter/General Contractor
Join Date: Nov 2011
Location: Anaheim Hills, California (OC)
Posts: 36,974
Rewards Points: 19,964

Re: Digging Holes


Even in seismic zones that's allowed as long as it's compacted properly.
Calidecks is offline  
The Following User Says Thank You to Calidecks For This Useful Post:
hdavis (07-26-2016)
Old 08-05-2019, 04:30 PM   #5
Registered User
 
Thatholedigger's Avatar
 
Trade: excavation
Join Date: Aug 2019
Posts: 1
Rewards Points: 6

Re: Digging Holes


I have a very similar question, but mine is in ultra rock thick soil on the side of a mountain in Colorado. I need 20, 7' foot holes filled with sonotubes. I am afraid that I will break the auger bit on the skid steer at that length in this terreain. what kind of rock blasting equipment exists to take some of the strain off the bit? is there such a thing? I am starting to think I just need to tamp and backfill the entire area. thanks.
Thatholedigger is offline  
Old 08-05-2019, 04:53 PM   #6
GC/carpenter
 
Calidecks's Avatar
 
Trade: Decking, Railing, Carpenter/General Contractor
Join Date: Nov 2011
Location: Anaheim Hills, California (OC)
Posts: 36,974
Rewards Points: 19,964

Re: Digging Holes


Quote:
Originally Posted by Thatholedigger View Post
I have a very similar question, but mine is in ultra rock thick soil on the side of a mountain in Colorado. I need 20, 7' foot holes filled with sonotubes. I am afraid that I will break the auger bit on the skid steer at that length in this terreain. what kind of rock blasting equipment exists to take some of the strain off the bit? is there such a thing? I am starting to think I just need to tamp and backfill the entire area. thanks.


Dexpan?



Mike.
_______________
Calidecks is offline  
Old 08-05-2019, 07:56 PM   #7
Fire up the BBQ
 
griz's Avatar
 
Trade: GC
Join Date: Nov 2009
Location: CA
Posts: 21,881
Rewards Points: 2,630

Re: Digging Holes


Quote:
Originally Posted by WAbrothers View Post
Howdy,

I need to dig 9' holes for light pole bases. The deepest I've ever gone was 4'. I would use an auger with an extension but whoever did demo to the building that this lot stands on did not completely demo the building underground. There's a lot of bricks and concrete mixed in the dirt. I feel like the auger wont work.

Has anyone excavated a larger hole, inserted the sonotube then back filled while compacting?

Thanks,

Woj
You should check with the Engineer that spec'd the 9' holes how they would like to proceed. To over excavate and insert a form & backfill/compact is called sleeving. Sonotube may not be an acceptable material due to the likelihood of it being damaged. I've done it several times with well casing.

Good Luck....




Quote:
Originally Posted by Thatholedigger View Post
I have a very similar question, but mine is in ultra rock thick soil on the side of a mountain in Colorado. I need 20, 7' foot holes filled with sonotubes. I am afraid that I will break the auger bit on the skid steer at that length in this terreain. what kind of rock blasting equipment exists to take some of the strain off the bit? is there such a thing? I am starting to think I just need to tamp and backfill the entire area. thanks.
If you are trying to dig say 2' dia holes in a very rocky terrain you will soon find yourself with a hole 6-7 feet in diameter. You are correct about breaking an auger. You would be doing a lot of drilling into rock and using a lot of dexpan or ecobust. Same as above check with the engineer that spec'd the holes
__________________
SOME JOBS JUST AREN'T WORTH DOING:
griz is online now  
The Following 2 Users Say Thank You to griz For This Useful Post:
Calidecks (08-05-2019), Fouthgeneration (08-07-2019)
Old 08-06-2019, 09:54 PM   #8
Pro
 
tjbnwi's Avatar
 
Trade: Remodeling
Join Date: Feb 2009
Location: Cedar Tucky, Indiana
Posts: 9,881
Rewards Points: 3,820

Re: Digging Holes


Quote:
Originally Posted by Thatholedigger View Post
I have a very similar question, but mine is in ultra rock thick soil on the side of a mountain in Colorado. I need 20, 7' foot holes filled with sonotubes. I am afraid that I will break the auger bit on the skid steer at that length in this terreain. what kind of rock blasting equipment exists to take some of the strain off the bit? is there such a thing? I am starting to think I just need to tamp and backfill the entire area. thanks.
Micro piles an option?

Call Straightline,

https://www.straightlinepier.com/pro...w/solana-solar

Never heard of these things until I got to Colorado. The builders super explain them to me, seeing them go in is interesting.

Tom
tjbnwi is online now  
Old 08-06-2019, 10:24 PM   #9
GC/carpenter
 
Calidecks's Avatar
 
Trade: Decking, Railing, Carpenter/General Contractor
Join Date: Nov 2011
Location: Anaheim Hills, California (OC)
Posts: 36,974
Rewards Points: 19,964

Re: Digging Holes


Quote:
Originally Posted by tjbnwi View Post
Micro piles an option?



Call Straightline,



https://www.straightlinepier.com/pro...w/solana-solar



Never heard of these things until I got to Colorado. The builders super explain them to me, seeing them go in is interesting.



Tom


Nice!


Mike.
_______________
Calidecks is offline  
Old 08-07-2019, 08:41 PM   #10
Pro
 
Fouthgeneration's Avatar
 
Trade: Masonry
Join Date: Jan 2014
Location: Middle
Posts: 2,398
Rewards Points: 8,583

Re: Digging Holes


Why not get rock driller to drill the holes

Hammer drill core drill rig?

rotary diamond oil field style bit?

Hill side fill and only 7' deep is enough?

Call a rock miner.....

BOOM-BOOM?

Rotary pneumatic/Hydraulic rock drills and rock cracking chemicals?

Buy the POCO pole installer lunch/beers and ask a Pro how they do it in the same area...... Why reinvent the wheel, steal it like a ChiCOM.

Erect the poles, back-fill 7' plus with self compacting fill...

Will the poles last inside a steel pipe poured into 3- 4 yard lump of concrete 7' tall about in side a 3-4' wide tube form (old 500/1000 gasoline tank) don't forget the Ufer ground wires/rods.

There are 110 year old power poles and towers in California land, it can't be Too tough.
__________________
I might be an Idiot, but I know things that You don't: Please wait till after you get my know-how to insult me....

Last edited by Fouthgeneration; 08-07-2019 at 08:56 PM.
Fouthgeneration is online now  
Old 08-07-2019, 08:45 PM   #11
GC/carpenter
 
Calidecks's Avatar
 
Trade: Decking, Railing, Carpenter/General Contractor
Join Date: Nov 2011
Location: Anaheim Hills, California (OC)
Posts: 36,974
Rewards Points: 19,964

Re: Digging Holes


Maybe you could get an engineer to sign off on tying directly to the rock. It's probably been there for a gazillion years.


Mike.
_______________

Advertisement

Calidecks is offline  
The Following 2 Users Say Thank You to Calidecks For This Useful Post:
Fouthgeneration (08-07-2019), Rio (08-07-2019)


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Digging post holes around roots Pie Construction 37 10-20-2014 11:38 PM
Hurd Windows, where are the weep holes Lettusbee Windows, Siding and Doors 13 07-18-2014 08:25 AM
Digging Post holes in winter we R reno General Discussion 21 02-05-2014 08:49 AM
Something keeps digging up my flowers jkfox624 Landscaping 11 02-11-2010 11:53 AM
Tape / other material to hide screw holes in metal door frame? Panzer5 General Discussion 6 06-08-2009 01:44 PM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for
PROFESSIONAL CONTRACTORS ONLY!

At DrywallTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?