Hello, everyone.
This is Enta.
The strong wind is blowing pollen right into my eyes—it's absolute hell!
It's only at times like this that I feel at ease doing desk work lol (sorry)
I'm just taking a ton of meds to deal with it lol
But that's beside the point.
Do you have any standards for applying pressure in ground anchor construction? (Just for yourself?)
Roughly speaking, what level of pressure do you think is ideal for grouting?
Basically, a pressure of around 0.2 MPa is sufficient, but,
Even if you were able to increase the pressure beyond that, it wouldn't make any difference.
It is known that when pressure is applied, the resulting material—known as pressure-treated concrete—exhibits increased strength.
However, the significance of pressurization in this ground anchor method is,
This refers to the process of applying pressure to the surrounding natural ground to cause it to permeate the stabilized soil. (In reality, the particles are too large to permeate.)
In the case of pressure-cured concrete, it must be allowed to cure while the pressure is maintained; therefore, once the load is removed, it is no longer considered pressure-cured concrete.
That said, in the case of ground anchors, since they are driven downward, the weight of the cement itself does exert a certain amount of pressure.
As a result, the grout density has increased in the areas where the same effect as pressurization has been achieved.
We'll apply pressure there as well, but,
Even if it comes out from the side of the casing before reaching 0.2 MPa, that’s the end of it.
To put it bluntly,It's fine even if no pressure is applied.That's the point.
Just because there’s no pressure doesn’t mean the anchor itself will come loose or fail to hold. That’s a separate issue.
The fact that it can't be pressurized isn't due to any installation error or anything like that.
It seems that some inspectors view this as a problem if no pressure is applied, but,
That isInsufficient Explanation by the ContractorThat's it.
Based on my experience, there were plenty of mountains where I couldn't apply pressure.
It has never once happened that I couldn't apply pressure and the seal failed (friction couldn't be removed).
In a sense,Pressurization is optionalThat aspect is quite strong.
In some cases, pressurization is possible, while in others, it is not possible at all.
You can just tell the government office that, too.
If you absolutely want to apply pressure, your only option is to switch to an all-packer setup.
You don't need to place that much importance on pressure.
Please think of this as one of the options available during the construction process.
And please don't get your hopes up too much about the pressure, lol.
It's kind of silly to get your hopes up about something that might or might not happen, isn't it?
The fact that it can be pressed in and will go in as far as you want means that,
Since it seems they've run off somewhere, I think that's fine as it is.
Since it's stuck in another gap.
As long as it fits securely in the drilled hole (for the anchor), there's no problem lol
See you later.
The Effect of Grout Pressure Injection on Friction Stress in Anchor Bodies
These are very informative experimental results.
