Table 5 Summary of pile length optimization.

From: Vertical compressive bearing performance and optimization design method of large-diameter manually-excavated rock-socketed cast-in-place piles

Test pile number

Length (m)

Characteristic value (kN)

Optimized pile length (m)

Pile length reduction (%)

A1

11.8

5404

7.0

59.3

A2

9.8

5404

6.8

69.4

B1

11.5

5404

8.2

71.3

B2

12.1

5404

9.0

74.4

C1

12.5

5404

8.2

65.6

C2

12.8

5404

8.3

64.8

D1

12.5

5404

9.1

72.8

D2

13.5

5404

10.4

77.0