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Hello, everyone. This is Enta. At a water collection and drainage boring site, you’re bound to run into one of these four issues: ① Perforated pipe getting pulled up along with the borehole; ② Jamming; ③ The borehole casing won’t go in due to ground collapse; ④ The slurry doesn’t come back up. It’s one of those moments on site where you think, “Ah, so it’s this one this time, huh? lol”…

Hello, everyone. This is Enta. The other day, I went to check out a site where we had previously installed drainage boreholes. The project was a private-sector job where part of the slope had already collapsed, and the client wanted to prevent further collapse. There was no stonework or anything like that—it was just a bare hillside. At the top…

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…)

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…

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…

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…”

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…

Hello, everyone. This is Enta. As for recent trends in dewatering drilling, it’s becoming common not to cut threads. I’ve also heard that if you don’t cut threads, the drill bit won’t fit into a 90-diameter borehole. That’s because it’s difficult to insert the VP40 socket into such a borehole. (Due to rocks in the borehole, etc…

Hello, everyone. This is Enta. In dewatering drilling operations, after drilling the borehole, you insert a strainer pipe and then pull out the outer casing, right? At that point, the strainer pipe tends to fall along with the outer casing (a phenomenon where the inserted strainer pipe falls down together with the outer casing). What should you do in such a situation…