Hello, everyone.
This is Enta.
Today, Mr. Itabashi from Toyotoku Industries (Machinery Repair) came to our place after lunch to do some repairs.
I learned how to use a gouging tool and how to perform detailed maintenance on the hydraulic unit!
That really helps.
But I really could use a mechanic, lol.
But that's beside the point.
The Pecking the Other Day
Once the drilling is complete, when I insert the measuring rod,
At its peak, the sand rises to about 7 meters.
The casing is full of sand, so the measuring rod won't fit inside.
I made sure the hole was long enough, but the anchor won't go in lol
So I'll have to re-drill it, but for now I'll use the MG-10 hydraulic press.
Without inserting a liner, fill the casing with water, then rotate and strike it while pumping water through it with the MG-10.
When that happens, the sand pushed up by water pressure flows out.
If you repeat this a few times, the amount of sand that gets pushed up will decrease.
But in the end, there’s always some left over. So this time, I dug 1 meter deeper than necessary.(This is a failure.)
When we dug 1 meter past the planned depth, the sand stopped right at the intended settlement depth.
From there, inject the replacement grout and drain the water; after confirming that the grout has completely filled the borehole, insert the anchor body.
But surprisingly, it doesn't fit!
So, it turns out that backflow is occurring during the replacement infusion.
I attached a short casing, struck it, and shook it up and down to retrieve the casing.
As a result, the anchor ended up sinking all the way down to the point where the hole was 1 meter too deep!
I think the cause is probably the pressure.
It is believed that the sand from the over-excavation was forced out by the pressure of the grout, causing the anchor body to fall.
The anchor had 1 meter too little slack, and on top of that, we couldn't pull it up.
Sand layers dehydrate very quickly. So it's practically impossible to pull them up.
Plus, since it's a temporary anchor, the polyethylene hose covering it is pretty thin...
If you wrap the wire around something and pull on it, it snaps easily...
Since that anchor had 2 meters of slack, but this one has only 1 meter, we will extend it.
It's a hassle, but there's nothing I can do about it.
When drilling in sandy soil, don't overdrill—keep it to a reasonable extent!
See you later.
