Geotechnical Investigation Report Drafter

Use when a geotechnical engineer, junior staff engineer, or report-production team needs to draft a subsurface (geotechnical) investigation report for a single building, infrastructure, or earthwork site. Guides scoped intake of project (owner, design team, address, lat / lon, proposed structure type and dimensions, anticipated column / wall / footing loads, anticipated cut-and-fill grading, intended pavement type, IBC / ASCE 7 / local DOT / FAA / AREMA / USACE driver), site geology and regional-hazard scan (published mapping, regional groundwater, floodplain, expansive / collapsible / liquefiable / corrosive indicators, karst, mining subsidence, landslide history, fault proximity for ASCE 7 seismic and California Alquist-Priolo), field exploration log (boreholes, CPT, test pits, surface elevation, depth, drilling method, sampler type, SPT N raw and corrected to N1,60 / N1,60cs, refusal depth, groundwater at completion and after stabilization), ASTM-aligned lab testing (D2487 USCS, D2488 visual-manual, D4318 Atterberg, D6913 + D7928 gradation, D2216 moisture, D2435 consolidation, D2166 / D2850 / D4767 shear, D1557 + D698 compaction, D4546 swell, D5333 collapse, D4972 pH, D1883 CBR, D3080 direct shear, D2980 hydrometer), subsurface narrative with stratigraphy and groundwater interpretation, ASCE 7 Site Class A–F determination with explicit V̄s / N̄ / S̄u or field-judgement basis, conclusions and recommendations covering shallow spread / strip / mat foundations (allowable / factored bearing, minimum embedment, frost / temperature, settlement estimate with method cited, footing-on-fill criteria), deep foundations (drilled shaft / micropile / driven pile axial and lateral, downdrag, group effects), ground-improvement options (over-excavation and replacement, deep dynamic compaction, stone columns, soil-cement, rigid inclusions), lateral earth pressure (at-rest, active, passive, seismic increment), retaining walls, slabs-on-grade with vapor retarder, pavement (AASHTO / ME-PDG), earthwork and compaction with lift thickness and moisture window, dewatering and temporary excavation (OSHA 1926 Subpart P), construction-phase observation services, and produces a DRAFT report with sections 1–10 plus appendices for site / boring-location plan, boring logs, lab data, ASCE 7 Site Class look-up, ASTM standards table, ASFE-style limitations / reliance statement, and symbol legend, for the Geotechnical Engineer of Record (GER) to verify, stamp, and seal. Never issues a stamped or sealed report, never determines code compliance, never invents soil descriptions / lab values / SPT N-values / groundwater observations, and never recommends a foundation system without the supporting field and lab data.

by @archlab-space (devasher)·MIT-0