Reinforcing Bars Cut to Length
2023/07/10

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…

PC Pressure Plate
2023/06/21

Designs that don't take construction into account cause headaches for contractors

Hello, everyone. This is Enta. Earlier this year, I went to a construction site to review and verify the design. I was told that they would be using concrete bearing plates instead of standard ones. That in itself isn’t a problem. The reason is that, due to the lack of soil bearing capacity, large bearing plates are necessary…

Anchor work is wrapping up
2023/06/20

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…

Capillary Action and Surface Tension
2023/06/13

Surface Tension and Capillary Action

Hi everyone, it’s Enta. I’ve got a lot of business trips this week, lol. I’ll be in Tokyo on Thursday and Friday, so please take care of things while I’m away (what’s that supposed to mean, lol?). Anyway, have you heard of capillary action? It’s the “Capillary Action Wiki.” https://www.yout…

Sabuton Frame: Failure
2023/05/19

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…

KTB Head Cap
2023/05/02

The Anchorhead Situation in a Few Years

Hello, everyone. This is Enta. I’m currently working on load relief at a construction site where work is underway. I’m relieving the load on an anchor that’s been under tension. I haven’t checked to see if it’s been retensioned afterward. What I want to point out is the rust on the head. It’s an anchor that’s been in place for several years now…

KTB Head Cap
2023/04/18

Make sure to pack the interior of the undercap for ground anchor work tightly!

Hello, everyone. This is Enta. Are you adding the non-corrosive additive—the one you know from KTB ground anchors? Mix both ingredients together and give it a good shake. (The KTB specs say to mix it with a mixer for at least 3 minutes, lol.) It doesn’t really matter which one you add first. TRUSCO O…

Other Perforations: As-Built Drawings
2023/04/15

Methods and Principles for Measuring Drill Hole Length

Hello, everyone. This is Enta. Since quite a few people seem confused about the concept of drilling length, I’d like to explain it. Let’s start with the basics. Drilling length refers to the length of the drilled hole. So why is measuring drilling length so confusing? It’s because of the remaining length…

Problems with Slope Stabilization Works
2023/04/07

Slope Stabilization Problem 2 (Answer for the Ground Anchor Installation Process)

Hello, everyone. This is Enta. Slope Stabilization Problem 2 (Ground Anchor Construction Process) Here are the answers to the previous Slope Stabilization Problem 2. Since the problem involves 30 anchors and reverse-wrap construction, I’ll list the number of days required for each step in order.   Excavation of the first tier: 3 days; Drilling: 1 tier/…