That Thing for Removing Slime | Drilling Site
Hello, everyone. It’s Enta here. It’s summer! Finally!!! The long rainy season is over! From here on out, we’re in for about two months of scorching heat. Let’s be extra careful as we go about our work! Anyway, I’ve finished making that thing I mentioned the other day. You know, that thing for collecting slimes…
Backfill Material Is Required Behind Concrete Load-Bearing Slabs | Construction Principles
Hello, everyone. This is Enta. Lately, I’ve noticed that during ground anchor installations, there are often cases where backfill isn’t being placed even though a load-bearing plate is in place. How about at your job sites? The natural ground is really uneven. Yet, there aren’t any zabuton frames or anything like that. Just the other day, we made a design change…
That Thing for Removing Drilling Slurry | Construction Tools
Hello, everyone. This is Enta. I really don’t want to do this, but I guess I’ll have to lol. It’s the “slime removal” that’s always required when supervising ground anchor work. Even though I’ve explained to the general contractor that it’s pointless, the local government insists I do it. If I tell the local government it’s pointless…
Drilling in High-Pressure Water (Part 4) | Conclusion
Hello, everyone. It’s Enta here. We’re already halfway through the year! It feels like just the other day we were talking about the COVID-19 pandemic and staying home, but it’s already July 2nd… Time sure flies, doesn’t it? I’ll be popping up here and there again this month, so please look forward to it. lol Anyway, moving on—the other day, Kronenbit reported that…
Drilling in High-Pressure Water (Part 3) | Field Test
Hello, everyone. This is Enta. This is a continuation of my previous post. After drilling with a crown bit, cement slurry is injected. Basically, when drilling the outer hole, the slurry is expelled outside the outer casing. And when the water pressure is high, it’s surprisingly difficult to tell whether it’s slurry or water…
Drilling in High-Pressure Water (Part 2) | On-Site Response
Hello, everyone. This is Enta. In my previous post, I introduced the crown bit for drilling in high-water-pressure environments. Here, I’ll explain how to use a crown bit for drilling. That said, it’s actually extremely simple—it’s exactly the same as standard single-hole drilling (outer drilling). Outer…
Drilling in High-Pressure Water Zones (Part 1) | Groundwater Management
Hello, everyone. This is Enta. Do you know this bit? This bit is used at sites with high water pressure and is called a Kronen bit. When the water pressure is high, water gushes out during drilling. For example, even after completing a 10-meter borehole, the internal pressure…
Waterproofing (Part 2) | Case Studies
Hello, everyone. This is Enta. I’d like to introduce a chemical that solidifies from the inside to prevent internal pressure from building up. The chemical I’ve been using nonstop for waterproofing lately is Hi-Cell OH-9X. By the way, I hear “OH” is pronounced “Oh-ha” lol. As for how this works…
Water Stopping (Part 1) | Technical Explanation
Hello, everyone. This is Enta. Do you think it’s easy to shut off a water supply that’s about eight times the normal flow rate? If you think about it normally, you’d probably say it’s difficult, right? And that’s without using any chemicals or anything. I feel a little bad that I’ve been posting nothing but water shutoff topics lately, but recently…