Choosing the Right Type of Cement | A Firsthand Account of a Major Subcontractor Forcing Through Its Unit Prices
Hello, everyone. This is Enta. The other day, I was talking with the president of a company. His company mainly works as a subcontractor for a major corporation. His concern was that the major corporation was being extremely pushy about unit prices. First of all, he said his quotes never get approved. And then, the unit prices are set at a fixed rate…
Things to Check Before Selecting Self-Drilling Rock Bolts
Hello, everyone. This is Enta. Things are happening right now that make me think, “I never would have imagined this would happen a few years ago!” To live a dramatic life, you have to be kind to others and kind to yourself. Being harsh is nonsense! Whether you’re kind or harsh, if you think of them as two sides of the same coin, then you’ll be kind…
Tips for Self-Drilling Rock Bolts
Hello, everyone. This is Enta. Today, I’m going to talk about self-drilling rock bolts lol. Self-drilling rock bolts: These are rock bolts consisting of a bit, a rod, and a coupling, and are mainly used as temporary rock bolts in places where the borehole walls cannot stand on their own…
Pitch of Single-Pipe Scaffolding | Guidelines for Site Spacing by Drill Weight [Slope Construction Specialists]
Hello, everyone. This is Enta. When erecting scaffolding for ground anchor installation or rebar insertion work, how do you give instructions to the scaffolding crew? For a drill of this size, what should the scaffolding spacing be? If you erect the scaffolding with precise spacing based on structural calculations, it requires a lot of time and materials…
Finishing the Job on Site | Tips for a Clean Finish Without Making a Mess Using Formwork
Hello, everyone. This is Enta. Have you ever seen construction work like this? (lol) It’s pretty bad, isn’t it? The thing is, apparently this was done on the government agency’s instructions. It seems they wanted to confirm that the water was overflowing. And that’s what left this mark. The result is a total…
The Second Smallest-Diameter Double-Pipe Casing in History
Hello, everyone. This is Enta. The second one of those φ65-diameter casing rods I introduced last time is finally done, lol. Well, the reason there’s a second one is that we’re still in the prototype stage, lol. Each rod has an effective length of 200 mm, so five of them make up 1 m. Going forward, this will be solid…
When inserting rebar, should the grout hose be left in place? Or should it be removed!?
Hello, everyone. It’s Enta here. Following up on my post the other day, here’s another question I get asked a lot about rebar insertion work lol. Should the grout hose be left in place, or should it be removed? Actually, I’ve written about this before lol. Should the grout hose be removed? I get asked that so often…
Considering Whether to Pour Concrete in a Single Batch or in Separate Batches When Drilling Double-Pipe Holes for Rebar Installation
Hello, everyone. This is Enta. Since I get asked about this often, I’d like to write about it again. “Grout Injection During Double-Pipe Drilling for Rebar Insertion.” I really get asked about this a lot! Is the grout injected into each pipe individually? Is it okay to inject it all at once? Is there any literature on this? And so on…
Validation Test for Empirical Design of Rebar Insertion | Approach to Load Setting
Hello, everyone. This is Enta. Do you know about the load requirements for verification tests using empirical methods in rebar insertion work? It’s something people tend to forget, but the basis for this design method is the NEXCO specifications. We perform rebar insertion work on a daily basis, but when it comes to pipes…