The Japanese Geotechnical Society’s Standards for the Design and Construction of Ground Anchors, and the Commentary Thereon
Examples include
| Cycle | Test Load | Load Holding Time (min) | ||||
|---|---|---|---|---|---|---|
| Rank B | Rank A | Rank B | Rank A | |||
| Sandy soil-rock formation | Cohesive Soil | Sandy soil-rock formation | Cohesive Soil | |||
| 1 | 0.40 Td | 0.40 Td | 1 | 1 | 15 | 15 |
| 2 | 0.60 Td | 0.60 Td | 1 | 1 | 15 | 15 |
| 3 | 0.80 Td | 0.80 Td | 5 | 5 | 30 | 60 |
| 4 | 1.00 Td | 1.00 Td | 5 | 5 | 30 | 60 |
| 5 | 1.10Td | 1.25Td | 30 | 60 | 60 | 180 |
It says so.
The load shall not exceed the following:
Rank A Design Anchor Force (Td) × 1.25
Rank B Design Anchor Force (Td) × 1.10
It says so.
At our company, we generally use a value of 1.20 Td based on the ground conditions and drilling conditions.
The table above is for illustrative purposes only.
1.20 is enough.
1.1 is enough.
The most important thing about anchor bolts is that they don't come loose.
