Hello, everyone.

This is Enta.

We are conducting landslide prevention work in Nagoya City.

We plan to release all of this content as soon as we finish on set, so stay tuned.

This time, it's about something else lol

 

This site is for landslide prevention, but it's bulging out.

So, the dry-stone wall is coming to the forefront.

Secure it with a rebar inserter.

 

However, since there was no space to set up the machinery, we opted to use hand-drilled rock bolts.

We handle the design in-house.

I thought it would go in relatively easily, but the clay in this area is getting in the way!

Self-drilling rock bolts are extremely vulnerable to clay!

 

There's a reason for this: the air volume is incredibly low. (The air holes are small.)

So, if you keep pushing the rock drill, it gets jammed at the tip, and if you stop pushing, it won't move forward. (You can't drill.)

Since it's clay, it would go a little faster if I used water to dissolve it, but this is Nagoya!

Right in the middle of town lol

There's no way I could flush out muddy water—it's air drilling, lol.

 

If you push the rock drill forward with just the right amount of force, it will cause problems.

That's a worker's hand!

The strain on your hands is absolutely immense when you're really pushing hard with a hand-operated rock drill.

If you keep doing this for a day, your hands will get all swollen.

It tingles all night long and gets swollen—it's really tough.

So, here it is!

Shingen-kun, you're a pro!

This is where it really comes in handy!!

 

Whether you do this or not makes a world of difference in how it feels!

Also, if possible, having two people operate a single rock drill makes the work much easier.

Some people use sponge-like materials or come up with their own solutions, but for quick and easy vibration work, this item from Workman is definitely the easiest option.

Or Amazon, I guess! lol

Vibration-Reducing Gloves: Shingen-kun, Professional Model, Black

It makes a huge difference whether you do this or not, so I highly recommend it.

 

But digging a hole by hand is really tough, isn't it?

When designing, I usually try to rely primarily on machine drilling, but in this case, a cost comparison showed that hand drilling was slightly cheaper...

It depends on the situation.

 

See you later.