Reflecting on Afforestation Efforts from 30 Years Ago to Plan for the Future
Hello, everyone. This is Enta. Landscaping projects used to be all the rage, but they’re becoming less and less common these days, aren’t they? Here’s a project from back in the day—this slope was probably built over 30 years ago. The reason is the treatment at the top. It’s been exactly 30 years since I entered this industry (it’s been a long time, but it felt like a blink of an eye…)
Rain from the mountains runs along the ridges, seeps into the bedrock, and lifts the deep bedrock.
Hello, everyone. It’s Enta here. Did you all get to rest up during the three-day weekend? As usual, I’ve been busy with nothing but quotes and more quotes, lol. Well, that’s just my normal routine. I was planning to go for a run in the mountains this weekend, but it rained the day before. I found tracks like these along the mountain ridge. It rained…
I want people to understand more about the effectiveness of dewatering in shallow landslides!
Hello, everyone. This is Enta. The other day, I wrote about how dewatering boreholes and dewatering rock bolts are effective in reducing soil pressure during heavy rain. By drilling temporary dewatering boreholes, we can prevent landslides in advance and provide ongoing protection against them! The cause of the embankment collapse in Noto was…
Water is definitely the cause of the embankment collapse in Noto! How should we deal with excessive pore water pressure from the mountainside during heavy rain?
Hello, everyone. This is Enta. Did you see the news about the collapse of National Route 249 in Ishikawa due to the heavy rain the other day? Shigekazu Noto, Director of the Nakanoto Civil Engineering Office, said, “There was an earthquake, so it’s possible that cracks formed in the mountain, causing the water flow to change. Because water seeped into the embankment…”
Drilling temporary drainage boreholes can prevent collapse in advance and provide ongoing protection against it!
Hello, everyone. This is Enta. Thanks to the heavy rain in Noto the other day, I was able to capture some really great footage. Take a look. Water is coming out from the top as well—this is the drainage pipe we installed as a safety precaution (we install these proactively as part of our service). It’s about 4 meters long. We drilled a 65-diameter hole and installed a perforated pipe…
土圧を考えると法面工における水抜きボーリング工は必須だと思う件
皆さんこんにちは。 エンタです。 竹林が現場の近くにありますか？ まぁ我々法面屋が仕事する所ってかなりの確率で竹林多いですよね。 例えばこの竹林が滑って、法枠工や鉄筋挿入工を施工したとしますよね。 竹林が滑った後って土が腐って…
荒砥沢地すべりのバランスを真剣に考えると画期的対策工に結びつく （ぼちぼちと 2 より）
2008年6月14日に岩手・宮城内陸地震が起きました。 現地調査に行きましたが、その後関わることがなかったので、詳しいことを知っているわけでは有りません。今年の9月の地すべり学会全国大会の現地見学会の一つが荒砥沢地すべりでした…
水抜きボーリング工の削孔角度はソロソロ改訂されても良い気がする。
皆さんこんにちは。 エンタです。 水抜きボーリング工の角度って以前結構ブログに書いた来たと思います。 設計では5～10度程度と書かれています。 この角度はどうなのよ？的な事ですね。 水抜きボーリング工においての角度の考え方は？ …
水抜きロックボルト工の将来性を考えたり、意見をもらった事を上げてみる。
皆さんこんにちは。 エンタです。 今後の展開として、水抜きロックボルト工の将来性を考えて見ました。 コレについては、イロイロな方からご意見や考察を頂いております。 それをザッと書いてみたいと思います。 1，老朽化…