What Is "Over-Drilling" in Core Drilling? | Learning About Core Drilling Length from a Site Where Reinforcing Bars Couldn't Be Inserted Due to Slime
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…
Does the Anchorage for Rebar Insertion Have to Be in Bedrock? | Explaining the Design Concepts of Movable and Immovable Soil Masses
Hello, everyone. This is Enta. August is here! It’s been way too hot ever since before summer even really kicked off—it’s enough to make your energy just melt away. Seriously, this year’s been absolute hell, and I’m totally wiped out… But anyway, today I’d like to talk about “displaced soil masses” and “undisturbed soil masses” in the context of rebar installation (rock bolting) work. When it comes to inspections and stage-by-stage verification…
How Are Verification Test Loads for Rebar Insertion Determined? | Design Tensile Force (Td) and the Approach to Acceptance Testing
Hello, everyone. This is Enta. Summer is in full swing, and it’s scorching hot on the job site. It’s super hot up on the scaffolding because of the heat reflecting off the ground below. The other day, I was already drenched in sweat first thing in the morning, right after the stonework was finished lol. And by the time the real work was about to start, I was dripping with sweat lolol. Anyway, moving on—this time, we’re talking about rebar…
Is Anti-Rust Oil for Rebar Insertion Tools Really Necessary? | Galvanized HDZT77 and the Limit of Oxidation Degradation
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…”
The Difference Between Rock Bolts and Rebar Installation | Conclusion: They Are Essentially the Same Method
Hello, everyone. This is Enta. We’ve entered the rainy season, and it’s that time of year when the schedule on-site keeps changing due to the rain. During times like this, I spend more time at the office poring over blueprints. And the humidity just makes me more and more irritable... In this post, I’ll be talking about “rock bolts and rebar insertion work…”
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…”
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…
The Argument Against Using Aluminum Caps for Rebar Insertion | 8 Reasons to Reevaluate NEXCO Specifications
Hello, everyone. This is Enta. The other day, at a slope construction site not contracted by NEXCO, I noticed that the rebar insertion tools weren’t fitted with caps at the ends. I thought, “Oh, so we’ve finally gotten this far,” so I’m going to write another post that’ll probably make the material manufacturers hate me lol. To cut to the chase…
I Tried Measuring the Limit of Packer Pressure!
Hello, everyone. This is Enta. I actually conducted this packer experiment a long time ago, but I finally got around to editing the video... I cured the material under 0.2 MPa pressure, at maximum pressure, and without pressure to observe how much it expanded. However, I later realized that this experiment was pretty much pointless...