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)…
Risks and Troubleshooting in Grouting Operations (Part 1)
Hello, everyone. This is Enta. In rebar insertion and ground anchor projects, we inject cement slurry. If the cement slurry keeps flowing in, how far should we inject it? For example, suppose there is a rebar insertion project with a borehole diameter of 90 mm and a depth of 5.0 m. The injection volume is …
Is tension control in ground anchor construction really pointless after all!?
Hello, everyone. This is Enta. The other day, I came across an interesting post on Mr. Ota’s blog at Ota Geo. “Bit by Bit 2: Anchor Tests Cannot Guarantee the Performance of the Anchored Section.” The gist of the article is that since grout is injected into both the anchored section and the free length, quality assurance tests (multi-cycle tests) are…
Using an angle-adjustable base can lead to some really tricky situations!
Hello, everyone. This is Enta. Are you managing your nerves? It’s really tough, isn’t it!? Getting everything lined up!!!!! Since people from the manufacturer’s development department are reading this blog, I’m going to go ahead and write this lol. This time, I’m also using an angle adjustment base. Because of that…
When it comes to formwork for rebar insertion and ground anchor work, void pipes offer better quality! (For Designers)
Hello, everyone. This is Enta. When it comes to cutting out openings for rebar insertion or anchor installation during the design phase, what do you think is the best approach? I think designers probably already decide which material to use based on their past experience. And they just take it for granted that…
It reliably slakes even in extremely hard mudstone, loam, and clay layers.
Hello, everyone. This is Enta. I heard the other day that an anchor came loose—lol. Apparently, the cause was a packer. Does using a packer increase the risk of it coming loose!? I actually think that’s almost never the case—lol (based on my experience). However, in this case, it seems to have come loose…
If water is seeping out even at a site where no drainage boreholes have been drilled, you should have them installed!
Hello, everyone. This is Enta. Lately, when I’m working on projects like rebar insertion, there are often spots where I think, “We’re in trouble if we don’t add drainage here.” For projects we design in-house, we always make sure to include drainage in the design. However, when it comes to projects handled by first- or second-tier subcontractors…
Project management during the rainy season is difficult
Hello, everyone. This is Enta. The rain is causing major delays on our site. How are things going on your sites? This tends to happen with any project that involves earthwork, doesn’t it? When it comes to earthwork on slopes, you often have to resort to single-cut excavation, but if you dig carelessly on a rainy day, it could lead to a collapse…
The Purpose of the Zabuton Frame | Its Role in Leveling and Providing Anchor Strength (Repost)
Hello, everyone. This is Enta. It’s getting hotter and hotter, isn’t it! There’s no time to waste when it comes to heatstroke prevention! Let’s stay cool with air-conditioned workwear and other gear! And above all, for those of us working on-site, our cars are our refuge! Don’t forget to get your car’s AC refrigerant checked…