Hello, everyone.
This is Enta.
Isn't this really beautiful?
These are the marks left by gas cutting the brackets for the temporary ground anchor system.
You can see an indescribable flow where the molten iron solidified as it spewed out.
I ended up taking a few shots of just this photo, lol.
I found myself thinking, "I wonder if there are fun moments like this on set, too?" lol
But that's beside the point.
We filmed a video showing the PC strand extraction process for temporary ground anchor work.
We'll be using a pulling jig to remove it, but,
I figured some of you might not be able to picture what it’s like, so I filmed a video.
It's actually really easy, but,
Simply set the jig onto the PC steel wire and hoist it up with a crane.
The load at which PC strands begin to move is approximately 1 to 2 metric tons.
If it takes any longer than that, it may not be possible to remove it with a crane.
In the case of cranes,Since the installation angle and pull-out angle of the PC strands are different, friction increases.
For that reason, it may be difficult to remove.
In cases like that, if you use a backhoe to pull it out at the same angle as the drilling angle, it comes out surprisingly easily.
However, since the reach isn't very long when pulling with the BH, you'll need to set up the extraction jig multiple times.
Once we get started, it'll be faster to use a crane.
See you later.
P.S.: We use the "Unbond Lock" from Fujiwara Industries Co., Ltd. as our pulling jig.
Fujiwara Industries Co., Ltd. Unbonded Rock
By the way, with the wire configuration, if you install both wires, it makes it difficult to remove the PC wire, so,
It's better to use a thicker wire and use it in just one place. The chain design is fine.
