Hello, everyone.
This is Enta.
What is the tension level for ground anchor work?
You don't get what this means, do you? lol
For example, as shown in the photo above, if the maximum test load is 39 MPa, the test is conducted by applying a load of 39 MPa.
So, if the design ultimate load is 30 MPa, how much would you apply? lol
Well, under normal circumstances, I think you'd apply 30 MPa, which is 100%.
You’re probably thinking, “That’s just common sense, isn’t it!?”
However, for now, let's stick to 80% of the design load.
There was a school of thought that said...
Set as a standby anchorThat's the point.
It’s true that PC steel strands have plenty of margin even under 100% load.
However, considering recent earthquakes and other factors, I feel like about 80% would be sufficient.
Anchors that are barely holding up under loads exceeding 100% of their capacity due to the earthquake, or
Many broken anchors can be seen.
I think it's better to have an anchor that can stop reliably even after it starts moving.
Until then, you just need to stay put for the time being, so aim for about 80% and leave 20% in reserve.
If the load exceeds the limit, measures such as installing a steel plate—as shown in the photo above—to hold the load in place when it protrudes will be necessary.
If you know this is going to happen, wouldn't it be better to limit the load to about 80% beforehand?
In the past, we often kept it at around 80%, so wouldn't it be possible to make a proposal like that in the future?
That's what I think.
However, the problem is that even if we submit a proposal to the government office, they will check with the design consultant, and
It wouldn't even be worth discussing if the design consultants had a different way of thinking, though lol.
It’s a really tricky situation because there are so many things I used to do all the time that I just don’t do anymore.
I do think this way of thinking is better when it comes to earthquakes, though.
To be honest, I don't think they'd slip that easily under normal circumstances as long as you use the Anchor and make sure to drain the water properly, lol.
There are all kinds of ways of thinking about it, so that part is tricky lol
See you later.
