Hello, everyone.

This is Enta.

There will definitely come a time when you have to remove the temporary anchors lol (after the main construction work is finished).

Extraction work is performed using either a crane or a backhoe (BH).

However, there are still cases where it won't come out.

The cause appears to be that the sheath surrounding the PC steel wire was torn for some reason, and

This is a situation where cement slurry is flowing into that area.

Once that happens, it's really hard to get out.

It depends on how long it's been stuck, but since it doesn't usually stick very firmly, applying about 7t of force should be enough to pull it out. (From experience)

But surprisingly, you can't really pull this out with a crane or a BH, can you? lol

It’s not that you can’t remove it with a crane, but I don’t recommend it because it’s dangerous. (There’s a risk of falling due to the recoil when it comes out.)

If there's enough space behind you in the BH, it's not impossible to force it, but it's risky.

In that case, you have no choice but to use a jack.

However, by the time of extraction, the support beams had already been removed, and neither the steel base nor any reaction forces remained.

In such cases, it is safer to install a reaction plate to absorb the reaction force while pulling the bolt out.

There are structures behind us, so it’s a very difficult site to work on.

The installation angle is about 40 degrees, which is quite steep, but it comes out easily even when pulled straight.

Once it starts moving, it comes out easily, so it's fine to use a crane to remove it.

It is important to ensure that construction is carried out safely.

We want to always prioritize safety in our construction work.

Sometimes it may be necessary to use bold methods during construction, but be sure to ensure the safety of those around you while working^^

See you later.