{"id":6346,"date":"2018-03-24T09:12:50","date_gmt":"2018-03-24T00:12:50","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=6346"},"modified":"2026-05-15T20:40:16","modified_gmt":"2026-05-15T11:40:16","slug":"self-drilling-bolt-manual-injection","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/self-drilling-bolt-manual-injection\/","title":{"rendered":"Manual Drilling and Grouting of Self-Drilling Rock Bolts | Manual Installation"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

Spring has already arrived in the Tokai region.<\/p>\n

But I can't go without wearing underwear under my pants (lol)<\/p>\n

I used to make fun of them, but now I feel a bit chilly if I don't wear them.<\/p>\n

Are you wearing underwear?<\/p>\n

\"What<\/p>\n

\n

But that's beside the point.<\/p>\n

Manual Drilling and Grout Injection for Self-Drilling Rock Bolts<\/h3>\n

There aren't many photos showing the drilling and grouting process for self-drilling rock bolts, are there?<\/p>\n

So, I went out and took some photos!<\/p>\n

We don't do this kind of work very often here either, so I figured if I missed this chance, I wouldn't be able to take any photos.<\/p>\n

\"Rock<\/p>\n

*For the retaining wall, holes are first drilled using a standard rock drill, and self-drilling bolts are then inserted into those holes.
\n(Drilling through a retaining wall on your own takes a long time.)<\/p>\n

Attach a shank rod for a rock drill to the self-drilling rock bolt.<\/p>\n

We will attach a rock drill to this shank rod.<\/p>\n

\"Self-Drilling<\/p>\n

That completes the setup, so we'll start drilling.<\/p>\n

Since each one is 500 mm long this time, I'll keep adding more as I finish each one.<\/p>\n

\"Self-drilling<\/p>\n

Use a coupler to top it off.<\/p>\n

\"Self-drilling<\/p>\n

Next, I installed the shank rod and drilled the hole.<\/p>\n

The key to drilling is to thoroughly scoop out the Kriko (drilling slime).<\/p>\n

Doing so will ensure a clean drill hole.<\/p>\n

Since this is intended for use in mountains where the borehole walls are not self-supporting, if the inner borehole walls continue to collapse and are discharged,<\/p>\n

It\u2019s actually quite common for the hole to get bigger.<\/p>\n

\"Self-drilling<\/p>\n

Once the drilling is complete, the grouting begins.<\/p>\n

\"Status<\/p>\n

Since there's not much this time, I'm going for a \"picnic?\" or \"cherry blossom viewing\" vibe with this setup, lol.<\/p>\n

Since there are five bags of cement, this should be enough.<\/p>\n

The mixer is manual, and the pump is a Peko-Pon. It's a diaphragm pump.<\/p>\n

Yamada Corporation, Inc.<\/a><\/span><\/strong><\/span><\/p>\n

\"Diaphragm<\/p>\n

Use compressed air to force the grout through.<\/p>\n

\"Self-drilling<\/p>\n

For self-drilling rock boltsInjection Adapter<\/strong><\/span>Set it up and inject it.<\/p>\n

You cannot perform self-perforation without an injection adapter. (It\u2019s not impossible, but it\u2019s very difficult.)<\/p>\n

Since the pressure is low this time, I'm using a standard air hose to fill it.<\/p>\n

With standard grout pumps, it is dangerous to use anything other than a pressure-resistant hose.<\/p>\n

\"Self-drilling<\/p>\n

Grout is injected through the center hole of the self-drilling rock bolt, and it is forced out from the tip and rises upward.<\/p>\n

\"Self-drilling<\/p>\n

Since there's a bit of pressure, even if you stop it as soon as you see it, it will still rise all the way to the top.<\/p>\n

\"Grout<\/p>\n

At this point, moving the self-drilling rock bolt slightly up, down, left, and right to allow it to settle will ensure a secure bond with the grout.<\/p>\n

In particular, if the borehole wall is not self-supporting, adhesion to the surrounding soil is a concern, so please ensure it is thoroughly compacted.<\/p>\n

It's a small thing, but it's important, so please give it a try.<\/p>\n

\"Self-drilling<\/p>\n

It\u2019s fine even if I don\u2019t let it overflow, but it just keeps coming out on its own even when I stop it (lol).<\/p>\n

If possible, it\u2019s best not to let it flow, as it will get dirty.<\/p>\n

\"Status<\/p>\n

That's it.<\/p>\n

I stuck a piece of Styrofoam in the tip, but it kept coming out from the inside due to the internal pressure, so I sealed it.<\/p>\n

After that, fill in the gaps once it has hardened, attach the pressure plate, and you're done.<\/p>\n

 <\/p>\n

This is probably the first article in the world to go into this much detail about hand-drilled self-tapping rock bolts, right? lol<\/p>\n

Please wait until the pressure plate is installed.<\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. It\u2019s already spring here in the Tokai region. But I still can\u2019t do without thermal underwear (lol). I used to make fun of it, but now I feel a chill if I don\u2019t wear it. Do you wear thermal underwear? But enough of that. Manual drilling and grouting for self-drilling rock bolts\u2026<\/p>","protected":false},"author":2,"featured_media":6364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[30],"tags":[416,1291,1292,1293],"class_list":["post-6346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lock-bolt","tag-416","tag-1291","tag-1292","tag-1293"],"acf":[],"yoast_head":"\n\u81ea\u7a7f\u5b54\u30ed\u30c3\u30af\u30dc\u30eb\u30c8\u306e\u4eba\u529b\u524a\u5b54\u3068\u6ce8\u5165\uff5c\u624b\u4f5c\u696d\u65bd\u5de5 - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e<\/title>\n<meta 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