On Hole Warping During Drilling in Rotary Percussion (Part 2)
Hello, everyone. This is Enta. Today, I’d like to talk about hole warping when drilling holes in rotary percussion instruments. I talked about hole warping the other day, and here I am talking about it again lol. The warping I mentioned the other day was vertical, but this time I’ll be discussing horizontal warping. It’s easy to understand how the weight causes the hole to warp vertically, right?…
On Hole Deformation During Drilling in Rotary Percussion Machinery
Hello, everyone. This is Enta. I wrote about drilling angles in dewatering borehole construction. What is the approach to angles in dewatering borehole construction? In that context, I received a question about casing deviation. I’d like to explore this based on the relevant materials…
What is the concept of angle in dewatering drilling?
Hello, everyone. This is Enta. I heard that the drainage borehole project I drilled and supervised last month has been completed lol. The final result looks really great—it’s beautiful, isn’t it! Each borehole is just under 30 meters long, and the drilling angle is 7 degrees. I always think to myself, when it comes to angled drilling…
I Tried Measuring Positioning Errors in Drainage Boring Work!
Hello, everyone. This is Enta. It’s gotten quite a bit cooler in the shade. But air-conditioned workwear is the best this time of year! The real benefit of air-conditioned workwear is how it handles the lingering summer heat, lol. It makes the lingering summer heat feel like autumn all at once, so you can get your work done comfortably. But anyway… Since last week, I’ve been working on draining the water…
If the machine is too low to place the concrete in the designated position, raise it!
Hello, everyone. This is Enta. We’ve been carrying out drainage boring work in Shizuoka as part of landslide prevention measures for the past few days. You know how it is—even when the construction location is set, sometimes the machine is positioned too low to align with the drilling spot. In practice, we set it a bit lower and use scaffolding…
As labor shortages intensify, we’re seeing more and more worksites where rates are high but staff is scarce!
Hello, everyone. This is Enta. We’ve recently started taking on small scaffolding projects as well. Actually, there’s a reason for this—it’s simply because there aren’t any scaffolding contractors available, lol. For large projects, there’s usually enough money to secure one, but for small projects, the budget is tight…
I still think digging with water is the fastest way to dig a hole!
Hello, everyone. This is Enta. These days, drilling is more about using water and air than just water, isn’t it? Water-only drilling used to be the norm. (Water and air is a more recent drilling method.) To clean the inside of the casing, we used to pour water liberally and move the inner rod up and down to flush it out…
Safe Work Spaces on Scaffolding for Rotary Percussion Work
Hello, everyone. This is Enta. Let’s say you’re performing skid-type drilling for ground anchor installation or rebar insertion. How wide do you think the scaffolding edges need to be in that case? I’m referring to the scaffolding on both the control panel side and the operator’s side relative to the drilling location. Often, the width of the scaffolding (horizontally)…
I Tried Core Drilling Using the Wireline Sampling Method!
Hello, everyone. This is Enta. I’ve been using a new tool for my work since a few days ago. It’s called a Soundscope. Have you heard of it? It’s a stethoscope that lets you listen to the sounds transmitted through metal. With the current “wireline” method, core boring…