Hello, everyone.
This is Enta.
Did you get a good rest during the three-day weekend?
I'm still all about quotes and more quotes, lol.
Well, that's what feels right to me.
I go for a run in the mountains on the weekend, but it rained the day before.
There were traces like this along the mountain ridge.
That's the road where the rain runs off, huh? lol
When it rains, the path along which the water flows is a ridge.
That said, there is other rainwater as well, seeping out from various watercourses and flowing along the ridge once more.
Repeating this process, the water that flows to the valley on the right at the watershed and the water that flows to the valley on the left—
When I read books on landslides,
The permeability of the ridge area (and its surroundings) is high, and it is said that drainage boreholes can absorb more water the closer they are to the ridge.
And apparently, the farther you get from the ridge, the harder it is for the soil to absorb water.
Water gushes out at the top, but as it reaches the bottom, it stops flowing all at once.
Based on my experience, draining the catch basins at the top of the mountain certainly results in an immense amount of water flowing out.
However, the lower the elevation, the less water there is.
Where did the water at the top go!!??
So, when you think about it, that means the water is triggering landslides and rockfalls.
It would be a whole different story if we could drill about 1,000 meters from the base up toward the mountain ridge, lol.
That said, our work mainly involves road embankments and the like.
Since we rarely go that high up, it’s enough for us to prevent collapse only when rainfall causes the groundwater level to rise sharply.
With that in mind, I think drainage boring will become essential for future slope construction projects.
In fact, in some municipalities, the combination of rebar insertion and dewatering drilling has become standard practice.
These days, it's all about drain bolts...
It looks like we'll be conducting an experiment on-site soon, and I'm looking forward to it.
I'm going to go around shooting everything up for free!!
See you later.
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