The Actual Installation Location for Ground Anchor Work Is... Not What I Expected! (Part 1)
Hello, everyone. This is Enta. Do you know the actual location of ground anchors? Huh? You’re probably thinking, “What are you talking about?” lol. As a construction manager, you measure the anchor installation location based on layout tolerances, right? But layout tolerances only apply to the final head position…
How to Remove Prestressed Steel Cables from Temporary Anchors That Won't Come Out
Hello, everyone. This is Enta. There always comes a time when you have to remove the temporary anchors after installing them (lol) (once the main construction work is complete). To pull them out, we use either a crane or a backhoe (BH). However, there are times when they still won’t come out. &nbs…
Here's the pressure used for pressurizing packers in ground anchor and rebar insertion work!
Hello, everyone. This is Enta. I’m sure you’ve all used a packer before. If you haven’t used one before, check out “How to Make a Packer for Ground Anchor Work (Part 1),” “How to Make a Packer for Ground Anchor Work (Part 2),” and “Ground Anchor…”
I think it's about time the drilling angles for dewatering borehole construction were revised.
Hello, everyone. This is Enta. I think I’ve written quite a bit on my blog before about the angle used in dewatering boreholes. The design specifications state an angle of about 5 to 10 degrees. So, what’s the deal with this angle? How is the angle determined for dewatering boreholes? …
I attended a technical seminar hosted by VSL Japan.
Hello, everyone. This is Enta. The other day, I attended a technical training session hosted by VSL Japan, a ground anchor contractor. I generally make it a point to attend these kinds of training sessions (almost always). The reason is to learn about new technologies. Of course, going to job sites and preparing paperwork every day is also important…
How do you verify the anchorage point in ground anchor construction?
Hello, everyone. This is Enta. In a recent survey conducted at the “K&i Web Academy,” I received a suggestion asking, “How can I check the anchorage of ground anchors (other than using slime)?” I’d like to write about this topic today. …
Differences in Interpretation and Discrepancies in Perception
Hello, everyone. This is Enta. You know about this, right? lol Well, it’s common knowledge in our industry, but if you’re an anchor engineer who isn’t familiar with it, please pick up a copy. The other day, all sorts of things happened during a job, so I was poring over books. And in the end…
Here's How to Remove Damaged Ground Anchors! (Part 2)
Hello, everyone. This is Enta. Here’s how to remove damaged ground anchors! (Part 1) This is a continuation of my previous post. How do you relieve the load from the anchor head? When it comes to removing wedge-type and nut-type anchors, the easiest and most cost-effective method is to use gas…
Here's How to Remove Damaged Ground Anchors! (Part 1)
Hello, everyone. This is Enta. Take a look at this photo. It shows a ground anchor from the Noto Earthquake. In the photo above, a massive load-bearing structure has shifted—perhaps because the prestressed steel strands have snapped? They’ve snapped completely, severing the tie rod anchor and causing the head to come off. The tie rod you can see…