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…
Drilling Depth and Machine Size in Ground Anchor and Rebar Insertion Work (Part 1)
Hello, everyone. This is Enta. How do you go about selecting a core drill? In our case—though I imagine most contractors do it similarly—this is just a general guideline. *This excludes special drilling methods. Drilling diameter: φ65 (no scaffolding required). Drilling depth…
Tips for Measuring Drill Hole Length | On-Site Techniques
Hello, everyone. This is Enta. When measuring the drilling depth during drilling, you usually hold the pin pole in one hand and use a staff and tape measure to take measurements, right? I think it’s pretty difficult because the measurements tend to be off. So, please try doing it as shown in the photo. You can probably see that the pin pole is floating, but…
On-Site Risks During the Basic Test | Preliminary Verification
皆さんこんにちは。 エンタです。 先日基本試験を行ったのですが、100KN程度で引き抜けました。 まぁそれはあくまでもτ（周面摩擦抵抗：タウ）を出すための試験ですので良いのですが、 予定よりも早い段階で抜けてしまうとイロイロと問題が出て来ま…
Methods and Principles for Measuring Drill Hole Length | On-Site Quality Control
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…
Use Super Yellow for Drilling Length | Utilizing Color Paint
Hello, everyone. This is Enta. This is my last Sunday in Hokkaido. Since last night, I’ve been out having a blast with my employees in Obihiro. It was fun. It was just plain fun!! That said, there’s still a little construction work left to do on Monday, but since we’ve almost finished cleaning up and everything else, I’m feeling pretty relaxed. …
This Is What Happens If You Let Your Guard Down During Anchor Work | Accident and Failure Case Studies
皆さんこんにちは。 エンタです。 失敗しましたｗ 先日のブログで油断しちゃいけないって自戒の念を込めて書いたつもりが・・・・ｗ 油断しちゃいましたｗｗｗ 目標値を把握する事で施工がもっと楽しくなる。 まぁ朝から余裕で2本削孔も…
のり枠のかさ上げ部分は地山扱い｜削孔長の計算根拠
皆さんこんにちは。 エンタです。 最近、何かとバタバタしていました。 そして、ブログが遅くなると言う悪循環。 申し訳ございません。もう少し早くアップ出来るように心がけていきます！ 閑話休題 ロックボルトの削孔長は3.0mです。…
Does the Drilling Depth Vary with Leveling Mortar? | Actual Measurement of 500 mm for Formwork 300
Hello, everyone. This is Enta. Does the drilling length for rock bolts vary? The drilling length for rock bolts is 3.0 m. For example, for a 300□ retaining frame, the length of the tie rod would be: protrusion + retaining frame thickness + drilling length = 0.1 m + 0.3 m + 3.0 m = 3.4 m. What about this?  …