Table 3 Low-strain test results.

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)

Test wave speed (m/s)

Integrity type

A1

11.8

3710

I

A2

9.8

3640

I

B1

11.5

3650

I

B2

12.1

3690

I

C1

12.5

3670

I

C2

12.8

3650

I

D1

12.5

3750

I

D2

13.5

3470

I

  1. Tested single piles with intact pile bodies are classified as Class I piles, those with minor defects as Class II piles, those with apparent defects as Class III piles, and those with severe defects as Class IV piles.
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