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…
If You Assume Problems Are the Norm | The Mindset of a Slope Engineer
Hello, everyone. This is Enta. The other day, I was trying to get myself worked up on site. There are six PC strands. Of course, we order the materials directly from the manufacturer (since we’re association members, lol). But that day, I just couldn’t get worked up! The reason being, the jack head only had four holes…
How Site Supervisors Should Take Photos (Part 2) | Practical Techniques
Hello, everyone. This is Enta. Since my photography tips were well-received (by a very small number of people, lol), I thought I’d write about the absolute basics of photo management. Everyone has their own unique style when it comes to photography, so there’s a good chance these tips won’t work for everyone. However, just because they don’t work for you doesn’t mean you should dismiss them…
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…
Could You Become a Waterproofing Specialist? | Diversification in the Slope Stabilization Industry
Hello, everyone. It’s Enta here. I’ve gotten pretty used to water stoppage now, lol. Since we’re short-staffed at Enta, I’m also doing construction management on-site, and I’m handling the water stoppage right behind the drilling crew. I’ve gotten pretty used to it. I’m starting to be able to stop the water even when it’s gushing out like this…
Every Day Is a Process of Trial and Error | Improvements at the Slope Construction Company
Hello, everyone. This is Enta. For the past few days, I’ve been struggling like crazy to stop the water seeping in behind the sheet piles of the temporary anchors, lol. The amount of water is insane! It’s almost laughable. It’s been a while since I’ve worked on a temporary anchor project with this much water. Come to think of it, this site has a deep well…
鉄を切る（その3）｜厚物切断
皆さんこんにちは。 エンタです。 鉄を切る！(その1) 鉄を切る(その2) 最近は毎日のように水と格闘しております。 と言うのも、仮設アンカー工において被圧水が多くて圧も高く大変だったのですが、なんとか試行錯誤しています！ｗ こう言うのって…