Hello, everyone.
This is Enta.
The Nintendo Switch has been released.
I've been a huge gamer for as long as I can remember.
I just have to buy it!
So, I bought *The Legend of Zelda*, but the kids snatched it away from me...
Can I borrow it once my kids are done?....
It's all about the spirit of giving way to others!
But that's beside the point.
Rock Bolt DesignThe borehole length is 3.0 mThat's it.
For example, if the legal limit is 300,Rope Material Lengthは
Projection + Formwork Thickness + Drilling Length = 0.1 m + 0.3 m + 3.0 m = 3.4 m
So, what about this?
This is clearly a frame that's over 300 mm.
If the actual measurement is 500 mm, doesn't that mean the drilling length will be 200 mm shorter?!?!
"That's what the government office told me a long time ago."
Well, it's a pretty common sight, isn't it?
This is what happens when you install the fence along the contours of the hillside rather than following the natural terrain, prioritizing aesthetics instead.
I guess this is fine in its own way, but personally, I think it's a waste of money.
Ground netting + mortar + effort = a waste of money lol
That’s a different story if the rebar is thick and the terrain is very rugged.
Well, putting that aside, there are often issues with drilling depth in rock bolting work, but,
That's a spot people tend to point out, isn't it?
Conclusion: The drilling depth remains the same!
That's all!
I can't just say that, lol, so here's an explanation, lololol
The 200-mm section is considered to be the unconsolidated soil section (natural ground).
No, no! It's mortar!I bet that's what they'll say lol
The red part is definitely mortar.
In cases where the natural terrain is highly uneven, it is sometimes necessary to spray a low-strength mortar and then install formwork on top of it.
(We used to have quite a bit of leeway in the budget, so we’d do things like leveling, but we don’t do that anymore.)
I think you’ll understand that, from a design perspective, it’s better to have something more solid than the original natural ground to support the structure.
"If the material used to fill in unevenness is of the same quality as or better than the natural ground, it shall be considered natural ground."
Slope Protection Association, “Textbook on Construction Management Techniques for Slope Protection Works, Heisei 19, p. 189”
It is listed as shown above.
Therefore, if we interpret the lower portion of the formwork—which became thicker than specified due to the sprayed concrete—as "natural ground," the drilling depth will remain unchanged.
If people start nitpicking over every little detail, it’ll make it impossible to do the work on-site, but I think it can’t hurt to know these things.
See you later.
