Hello, everyone.
This is Enta.
In ground anchor construction, there’s a technique called “packer installation,” right?
It's not widely known, but the cost of installing this packer is actually quite high.
And, even though not many people know this, I put together some cost estimation data today, so I'm posting it here lol.
| Packer Installation Rate (units/day) Moriya Steel Machinery Co., Ltd. | |||
| Compatible Models | Anchor Tendon | Anchor Tendon | Anchor Tendon |
| Anchor Force Td | Td<400 | 400 ≤ Td < 1300 | 1300 ≤ Td < 2000 |
| Construction Rate | 10 bottles | 8 bottles | 6 bottles |
I think most anchors fall within the middle range of “400 ≤ Td < 1300.”
| Packer Installation Crew (Person-Days) | |||
| Caretaker | Specialized Worker | General Laborer | |
| Standard Staffing Levels | 1 | 1 | 2 |
This is the standard staffing level.
Apply the standard staffing levels. (Ground Anchor Estimation Guidebook)
| Packer Installation Rate (per unit) | Per 8 bottles | |||
| Name and Specifications | Unit | Quantity | Unit Price | Amount |
| General Civil Engineering Coordinator | 人 | 1 | 23,600 | 23,600 |
| Specialized Worker | 人 | 1 | 23,100 | 23,100 |
| General Laborer | 人 | 2 | 19,800 | 39,600 |
| 計 | 式 | 1 | 86,300 | |
| Per unit | 10,787 | |||
This is the labor involved in installing the packer.
The ingredients will go in here.
As a rough estimate, the standard unit price for packer is about 5,300 yen per meter, and for Span Seal, it’s 400 yen per meter.
Assuming one Span Seal per approximately 20 cm, you'll need 40 cm in total for the top and bottom.
Please note that the length of the injection hose varies.
Also, don't forget to separate the lines for injection and exhaust.
Since there are rock bolts, I'll just include the step height here.
| Packer Installation Rate (units/day) | ||
| Packing Supervisor | L < 4 m | 4 m ≤ L < 8 m |
| Construction Rate | 16 bottles | 12 bottles |
| Surge Factors Based on Rock Bolt Diameter | ||
| Rock Bolt Diameter | D ≤ 25 | 25<D |
| Surcharge Factor | 1.0 | 1.2 |
I tend to forget this calculation method myself, so I'm writing this down as a sort of reminder lol.
Lately, I’ve been doing something kind of funny: I write something myself, but then forget what I wrote, so I end up Googling it to look at my own article.
Well, since my blog has already turned into a personal journal, it seems to be serving me just fine, lol.
See you later.
