Slope Stability Field Investigation Checklist (ASTM D5088-22 Compliant)

ASTM D5088-22 primarily addresses soil nailing as a stabilization method, but its scope explicitly requires comprehensive pre-construction field investigation to inform design — hence the need for a compliant checklist that extends beyond nailing-specific criteria to encompass holistic slope stability assessment. The checklist operationalizes key geotechnical principles including kinematic feasibility analysis, limit equilibrium assumptions, and the influence of pore-water pressure on effective stress, all grounded in field-observable indicators such as tension cracks, scarps, bulging toes, and seepage patterns. It mandates multi-scale observation: macro-level (slope morphology, landform evolution, vegetation anomalies), meso-level (discontinuity mapping, soil stratigraphy, surface erosion features), and micro-level (soil texture, moisture state, root reinforcement, efflorescence). Integration with complementary standards (e.g., ASTM D1586 for SPT, D1587 for thin-wall sampling, D5778 for CPT) is required to ensure subsurface data quality, while digital documentation (geotagged photos, GPS coordinates, GIS-linked sketches) supports traceability and peer review. Crucially, the checklist embeds iterative verification: field findings must be reconciled with preliminary hazard screening (e.g., USGS landslide inventory maps) and updated in real time to guide subsequent exploration (e.g., targeted borings or inclinometer installation).