New! Enta's Slope Management Schoolis an information site dedicated to slope construction, by slope construction professionals, and for slope construction professionals.

Hello, everyone. This is Enta. I’ve been working on a rebar insertion project for the past few days—do you know what “pre-drilling” is? It’s the process of drilling holes in advance to make it easier to drill during rebar insertion or ground anchor installation. It varies depending on the site, but as shown in the photo above…

Hello, everyone. This is Enta. You know those anchor pins used in retaining wall construction, right? There’s usually one at the intersection and about two to six on the crossbeams. Even when installing rock bolts or ground anchors in the center, they’re driven into the ends of the intersection. Rock bolts…

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…

Hello, everyone. This is Enta. One of the most tedious tasks for a slope engineer is creating slope development drawings. I’m not a fan of it, lol. That said, I do actually enjoy drawing up the plans, though~ However, if you make a mistake in how you take the measurements, it makes drawing the plans a real struggle. So…

Hello, everyone. This is Enta. We’ve been hit by a major cold snap for the past few days—how is everyone holding up? Here in Nagano, we’re working on a slope at minus 15 degrees Celsius, installing the retaining wall almost directly on the slope. The other day, heavy snow fell again in the afternoon, bringing work at the site to a halt. Snow at this time of year is really tough. Overall, the...

Hello, everyone. This is Enta. The mortar around the frame is peeling off. I was asked if this is a problem or not, lol. What do you all think? Is it okay? Or not? Structurally, it’s fine, but from a contractor’s perspective, it’s not, lol. So…

Hello, everyone. This is Enta. I came across this frame the other day when I was in Yokohama. Are you guys curious about it? lol Can you tell what it is? Here’s what it looks like up close. I took a close-up shot, but it’s hard to make out, isn’t it? Once someone points it out, I think you’ll go, “Oh, right.” …

Hello, everyone. This is Enta. In formwork construction, you lay out the rebar, right? You install main anchors at the intersections. This is standard formwork construction. Now, suppose rebar insertion work or ground anchor work is added here. In that case, at these intersections, there would be void pipes or PVC pipes…

Hello, everyone. This is Enta. The other day, I wrote about curing cement slurry test specimens. Curing Cement Slurry Come to think of it, I haven’t written about curing sprayed mortar yet, so I’ll share my experience here. Sprayed mortar test specimens are huge, you know…