What Is Relaxation? | Explaining How PC Steel Strands Gradually Loosen Using Rubber Bands [Anchor Basics]
Hello, everyone. This is Enta. The other day, after I wrote an article about set loss, I got a question asking, “So, what exactly is relaxation?” lol. That’s a good question, lol. If I told you, “It’s in the Design and Construction Guidelines for Ground Anchor Works!” you’d probably be like, “Whaaaat?!” lol. At our company…
What Is Set Loss? | How Tension Stabilization of Ground Anchors Reduces Load and On-Site Countermeasures
Hello, everyone. This is Enta. Young engineers often ask me, “Is set loss really necessary?” Come to think of it, even though the term “set loss” is thrown around all the time on job sites, there are actually a lot of people who’ve never had it properly explained to them. Back in the day, when I was installing ground anchors…
Procedures and Hazard Points for Removing Permanent and Temporary Anchors | Decision Criteria by Jack, BH, and Crane Type
Hello, everyone. This is Enta. I wrote an article a while back titled “For Those of You Who Can’t Sleep Because Your Anchor Came Loose” (what a terrible title, lol), and even now I still occasionally get messages asking, “It came loose… what should I do…?” lol I know exactly how you feel. It’s happened to me countless times too…
Is it really necessary to attach a dial gauge to the compression plate in ground anchor construction? An explanation from a veteran’s perspective for beginners lol
Hello, everyone. This is Enta. When you’re tensioning ground anchors, you attach a dial gauge or digital meter to the jack side, right? That’s to measure the elongation of the prestressed steel strands. It’s not enough to just check the tension load—you need to verify both the load and the elongation. For beginners…
Weather Resistance of Polyethylene and Carbon Black | What Does the Future Hold for Leveling Mats!?
Hello, everyone. This is Enta. Not many people can really explain the weather resistance of those leveling mats that go under the load-bearing plates in ground anchor construction, right? lol That’s because nobody’s interested, lol (it’s the kind of thing manufacturers just mention in passing). “Well, it’s PE (polyethylene), so…”
No Oil Allowed at Water Treatment Plants!? A Story from a Site Where the Anti-Rust Oil Used to Treat Ground Anchor Heads Was Switched to a Biodegradable Alternative
Hello, everyone. This is Enta. When you’re working on ground anchors or inserting rebar, you put rust-preventive oil inside the caps, right? That’s actually a petroleum product (mineral oil). Well, I’m sure you already know that, lol. It is made from naturally derived raw materials, but if it leaks into the soil or water, it doesn’t really break down…
Let's Talk About Collapse Prevention Measures During Construction! (Part 2)
Hello, everyone. This is Enta. This is a continuation of my previous post. “Slope Collapse During Construction: Water Is Almost Always the Cause (Part 1)” In Part 1, I wrote about how the safety factor (Fs) does not reach 1.2 during construction, how water tends to concentrate on the weakest points, and how sheet protection is only a temporary measure…
Water came out of the PC steel strand!!! What should I do in a situation like this!? (Part 2)
Hello, everyone. This is Enta. Water came out of the PC strand!!! What should you do in a situation like this!? (Part 1) This is a continuation from last time. For some reason, water started coming out of the head of a ground anchor. The most likely causes are probably something happening nearby, a change in the water table, or an earthquake…
Water came out of the PC steel strand!!! What should I do in a situation like this!? (Part 1)
Hello, everyone. This is Enta. When installing ground anchors, water sometimes comes out of the head, right? From between the PC strands, lol. You’d think, “It’s surrounded by grout, so there’s no way water could get in, right!?” Of course, manufacturers use epoxy to prevent water from getting in…