Table 2 Parameters of anchor cables
Layer | Horizontal interval (m) | Number of steel strand | Orifice relative elevation (m) | Drilling angle (°) | Length of free segment (m) | Length of anchoring section (m) | Design value (kN) | Pre-stressing value (kN) |
|---|---|---|---|---|---|---|---|---|
1 | 1.20/2.40 | 6 | −1.50 | 25 | 30 | 3 | 500 | 300 |
2 | −4.75 | 25 | 22 | 750 | 450 | |||
3 | −9.50 | 20 | 27 | 850 | 510 | |||
4 | −14.00 | 15 | 19 | 800 | 480 |