What Is the Becker Penetration Test (BPT)?
BPT (the gravel's — the SPT's; the 3-inch) is the penetration (the double-acting — the diesel; the 170-lb) test for (the gravels — the cobbles'; the SPT's — the refusal). The test: the 3-inch (the casing's — the driven; the plugged), the N_B30 (the corrected — the 30's; the energy's), and the correlation (the (N1)60's — the Harder/Seed's; the liquefaction's). The gravel's — the Becker tested.
Best price · Quotes back fast · PE stamps backed by Apex Grid Engineering
How BPT works
The diesel (the double-acting's — the 170-lb's; the hammer), the 3-inch (the casing's — the plugged; the driven), the N_B (the blows' — the foot's; the recorded), the energy (the measured — the 30%'s; the N_B30's), and the depth (the 100-foot — the capable; the gravel's).
The correlations
The N_B30 (the energy's — the 30%'s; the corrected), the (N1)60 (the equivalent's — the Harder/Seed's; the 1996's), the liquefaction (the gravel's — the triggering's; the (N1)60cs's), the Dr (the relative's — the density's; the correlated), and the 100 (the gravel's — the %; the SPT's — the refusal).
Practice
The dams' (the gravel's — the 100-foot; the BPT's), the 3-inch (the samples' — the none's; the disturbed's — the sometimes), the cost (the 2x's — the SPT's; the specialized), and the US (the west's — the dams'; the specified). The Becker is the gravel's — the SPT's substitute.
The bottom line
Use Becker BPT (3-in plugged casing, diesel hammer, energy-corrected N_B30) where SPT refuses in gravels/cobbles — correlate to equivalent (N1)60 via Harder & Seed (1996) for liquefaction triggering.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.