Hello, everyone. This is Enta. I wrote a series on construction errors involving ground anchors on this blog back in 2018, and I rewrote it again in 2023, but to be honest, both versions ended up feeling a bit half-baked, lol. This time, when I reread my old posts, I thought, “Wait, this…”

Hello, everyone. This is Enta. Someone asked me, “Why are you drilling 3.1 meters when the design calls for 3 meters?” That’s a good question. I used to wonder the same thing myself, lol. But anyway, today I’d like to talk about “over-drilling” during the drilling process. When drilling for rebar installation (rock bolt installation) or anchor installation…

Hello, everyone. This is Enta. It’s been really hot every day, huh? lol The job site has been like a steam room since this morning, and it feels like my stamina’s going to wear out first. Let’s make sure to stay hydrated and get enough salt! ^^ But anyway, this time I’d like to talk about “the rust-preventive oil used in the heads of rebar insertion tools—is it really…”

Hello, everyone. This is Enta. When managing stress in ground anchors, we look at the load and the amount of elongation, right? It’s not enough to just look at the load cell and say, “Okay, that’s good.” We also check how much the prestressed steel strands have elongated and whether there are any unusual deviations from the design elongation. Basically, this is important, isn’t it? Qualification tests and…

Hello, everyone. This is Enta. After installing ground anchors, it’s quite common to find that the grout has settled when you check the opening. As usual at this job site, the top of the grout was about 1 meter below the opening. There was probably some grout that had shifted downward as well…