What to Do When You Can't Inject Cement Slurry | A Simple Trick Using Just a Cutter to Prevent Injection Hose Ruptures During Rebar Installation
Hello, everyone. This is Enta. Obon has come and gone, and it seems like the heat on the job site is finally starting to ease up a bit, but it’s still a time when heatstroke is a real danger if you let your guard down. Let’s make sure to stay hydrated and get enough salt, lol. Anyway, moving on—this time, we’ll be talking about rebar insertion work and the field…
Key Points for Installing Self-Drilling Rock Bolts | Q&A on Drilling and Grouting to Avoid Confusion on Site
Hello, everyone. This is Enta. Today, I’m going to summarize the key points of self-drilling rock bolt installation in a Q&A format. I feel that self-drilling rock bolts are a method where “the more experience a contractor has with them, the more cautious they become.” At first glance, it seems simple—drilling, grouting, measuring…
Backfilling for stone masonry and backfilling for slopes are exactly the same thing!
Hello, everyone. This is Enta. Lately, I’ve been receiving reports that stone walls are about to collapse, have already collapsed, or are starting to crumble. They’re starting to gap open like this, or cracks are appearing on the front, making them look quite unstable. The cross-section of a stone wall usually looks like this…
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…
How to Make a Packer for Ground Anchor Construction (Part 4)
Hello, everyone. This is Enta. It’s Monday, lol. Starting today, I’ll be conducting a two-day training session in Odawara on measures to prevent stone wall collapse. The training will cover construction methods step by step, and participants will get hands-on experience. I plan to make sure they thoroughly learn management methods, quality standards, and construction tips. Also…
Lowering Workability Improves Productivity | A Paradox
Hello, everyone. This is Enta. Have you ever thought about the balance between workability and quality in quality control? Let’s take cement slurry, which is commonly used. In a flow test, it typically takes 10 to 18 seconds, with a maximum of 22 seconds (for railways), right? How long does it usually take you to apply it? Well, one…
Pressure Does Not Rise During Casing Pressurization; Pressure Escapes from Outside the Casing | Investigating the Cause
Hello, everyone. This is Enta. The other day, I received some feedback regarding the grouting process—I believe it was from an employee of the client’s construction management company. I’ll explain this in more detail below. 1. Drilling complete 2. Inner rod removed 3. Anchor inserted 4. Cement slurry injected through the grouting hose (…
What to Do When You Can't Inject Cement Slurry (Part 2)
Hello, everyone. This is Enta. Are you all already back home for the Obon holiday? I have a job interview in Nagano today. It’s a referral from Hello Work. It’s always exciting when new people join the team. And since we’ll be able to take on more tasks, it’ll make things even more fun in the future! Quiet…
What Should We Do About the Injection Hose? | Deciding Whether to Remove It or Leave It In
Hello, everyone. It’s Enta here. I used to say all the time, “There’s no such thing as a project that never ends.” Well, if you keep at it, it’ll eventually wrap up. Even here at our place, a project that’s been dragging on for a while is finally coming to an end lol. Man, that was a hassle. It was so much of a hassle it’s actually funny. This one’s also…