This is for a project that I am looking into. The retaining was are mostly in the 10' height range with a few up to 12'. They where originally designed as Large SRW system. The problem is that they are on the property line and do not have room to install the wall properly. Some one suggested...
Just a quick question. I have done a search on this site regarding permanent solder pile walls and precast lagging and it seams it is only done as a bottom up method which I understand why. My question is can a soldier pile wall be built top down as usual but have the timber lagging back lagged...
I have a 13,000 ft lb drive from Digga that is 12" in dia. Helical would work in that size constraint. Also TEI has a man portable drill that can install 30mm hollow bar that might work for you.
If the stone is loose with a lot of seams you will have a problem drilling without a temp. casing. A DTH drill with a casing would be your best bet in my opinion.
Here is a detail from Keystonehttp://files.engineering.com/getfile.aspx?folder=4102e748-7c56-4fc6-a1e5-7ecde6459a6c&file=Specialty_Applications_Keystone_Retaining_Wall.pdf
A core barrel is just a round casing like tool with cutting tools on the end. You can have it made any size you want. Most suppliers will get it the size you need and you can spec the kind of cutting teeth on the end. Maybe it can be made with a saw tooth pattern on the end to try to cut geogris...
I have seen fence guys try to auger geogrid ti install fence and the auger grabs the geodrid and actully pulls the the SRW outof aligment at the top of the wall. If you know where the geogrid is usally every 3 courses maybee you can run a core barrel at that elvation and then clean up with an...
Where is the job located? Can you you use other types of shoring sheet piles, H piles and lagging? Has your underpinning contractor ever done this before? Is he a underpinning contractor or a mason? How much room or tolarance do you have to work with to get your valut in?
You also can use a hollow injection anchor. I think they make a 30 mm holow tread bar that can be installed with a 90 lb rock drill that can be socketed into the rock with a 42 mm rock bit and grouted that would do the trick. Lock up williams form and CTS/Titan.
I am a helical anchor installer in NJ We have installed 1 3/4" shaft with 6" grout pull down piles to 70+ feet with 200 Kip ratings. But you definelty wont get 5' embedmnet in dense sand stone. You either will get something to grab and get the proper torque or will just bottom out and spin the...
I agree that underpinning would have been more economical. But when I tell you the building is in bad shape the walls a bulging in many places the rubble can be removed by hand it has no motar in the joints you can pick any stone and just pull it out. We dug several test pits and it is a loose...
