What Is Vibro Replacement Stone Column Design?
Vibro replacement (the vibroflot's — the probe's; the stone's — the backfilled) densifies the granular and reinforces the cohesive (the columns' — the 2-4 foot; the compacted). The design: the grid (the spacing — the 5-10 foot), the depth (the 20-60 foot — the treatment's), and the verification (the CPT — the improved; the load's — the tested). The ground's — the vibrated improved.
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How vibro works
The probe (the vibroflot's — the vibration; the water's — the jetting), the stone (the backfill's — the lifts'; the compaction — the amperage's), the columns (the 2-4 foot — the dense; the interlocked), and the matrix (the densified — the granular's; the reinforced — the cohesive's).
Design
The grid (the spacing — the 5-10 foot; the triangular's), the depth (the 20-60 foot — the treatment's; the refusal's), the stone (the graded — the 1-3 inch; the quantity's), the area ratio (the 10-30% — the replacement's), and the settlement (the Priebe's — the improved; the method's).
Applications and QC
The liquefaction (the mitigation — the densified; the drained), the embankments (the stability's — the reinforced), the tanks' (the settlement's — the controlled), and the QC (the amperage — the monitored; the CPT — the verified; the load tests'). The vibro is the granular's — the densified and the drained.
The bottom line
Design vibro replacement on 5-10 ft triangular grids to 20-60 ft depth — verify densification with CPT and load tests; use for liquefaction mitigation and embankment/tank support.
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