{
  "$schema": "https://geotech.services/schemas/standards-codes.json",
  "metadata": {
    "entity": "geotechnical_standards_database",
    "source": "geotech.services",
    "expertise_level": "professional",
    "written_by": "geotechnical_engineers",
    "validated": true,
    "commercial_bias": false,
    "last_reviewed": "2025-01-13",
    "version": "1.0.0"
  },
  "standards": {
    "indian_standards": [
      {
        "code": "IS:1892",
        "title": "Code of Practice for Subsurface Investigations for Foundations",
        "scope": "Soil and rock investigation for buildings, embankments, dams, retaining structures",
        "key_provisions": ["Borehole spacing", "Depth of investigation", "Sampling requirements", "Testing frequency"],
        "latest_revision": "2018",
        "supersedes": "IS:1892-1979"
      },
      {
        "code": "IS:1904",
        "title": "Code of Practice for Design and Construction of Foundations in Soils: General Requirements",
        "scope": "General foundation design principles for all structures",
        "key_provisions": ["Foundation depth criteria", "Factor of safety", "Settlement limits", "Construction requirements"],
        "latest_revision": "1986 (Reaffirmed 2020)"
      },
      {
        "code": "IS:6403",
        "title": "Code of Practice for Determination of Bearing Capacity of Shallow Foundations",
        "scope": "Bearing capacity calculation for spread footings and rafts",
        "key_provisions": ["Bearing capacity equations", "Shape and depth factors", "Eccentric loading", "Inclined loading"],
        "latest_revision": "1981 (Reaffirmed 2017)"
      },
      {
        "code": "IS:8009 Part 1",
        "title": "Code of Practice for Calculation of Settlements of Foundations - Shallow Foundations",
        "scope": "Settlement prediction for shallow foundations",
        "key_provisions": ["Immediate settlement", "Consolidation settlement", "Elastic methods", "Stress distribution"],
        "latest_revision": "1976 (Reaffirmed 2018)"
      },
      {
        "code": "IS:2911 Part 1 Sec 1",
        "title": "Design and Construction of Pile Foundations - Driven Cast In-situ Concrete Piles",
        "scope": "Driven cast-in-situ pile design and construction",
        "key_provisions": ["Capacity calculation", "Installation", "Load testing", "Integrity testing"],
        "latest_revision": "2010"
      },
      {
        "code": "IS:2911 Part 1 Sec 2",
        "title": "Design and Construction of Pile Foundations - Bored Cast In-situ Piles",
        "scope": "Bored pile design and construction",
        "key_provisions": ["Capacity methods", "Slurry stabilization", "Concreting", "Defects and remedies"],
        "latest_revision": "2010"
      },
      {
        "code": "IS:2911 Part 4",
        "title": "Design and Construction of Pile Foundations - Load Test on Piles",
        "scope": "Static pile load testing procedures",
        "key_provisions": ["Test load magnitude", "Loading procedure", "Settlement criteria", "Interpretation"],
        "latest_revision": "2013"
      },
      {
        "code": "IS:1893 Part 1",
        "title": "Criteria for Earthquake Resistant Design of Structures - General Provisions and Buildings",
        "scope": "Seismic design of buildings including foundation",
        "key_provisions": ["Seismic zones", "Response spectrum", "Liquefaction assessment", "Foundation requirements"],
        "latest_revision": "2016"
      },
      {
        "code": "IS:2131",
        "title": "Method for Standard Penetration Test for Soils",
        "scope": "SPT test procedure and equipment",
        "key_provisions": ["Equipment specifications", "Test procedure", "Recording", "Corrections"],
        "latest_revision": "1981 (Reaffirmed 2017)"
      },
      {
        "code": "IS:4968 Part 1",
        "title": "Method for Subsurface Sounding for Soils - Dynamic Method Using 50mm Cone Without Bentonite Slurry",
        "scope": "Dynamic cone penetration test",
        "key_provisions": ["Equipment", "Procedure", "Correlation with SPT"],
        "latest_revision": "1976 (Reaffirmed 2016)"
      },
      {
        "code": "IS:4968 Part 3",
        "title": "Method for Subsurface Sounding for Soils - Static Cone Penetration Test",
        "scope": "CPT test procedure",
        "key_provisions": ["Mechanical and electrical cone", "Push rate", "Data recording", "Interpretation"],
        "latest_revision": "1976 (Reaffirmed 2016)"
      },
      {
        "code": "IS:1888",
        "title": "Method of Load Test on Soils",
        "scope": "Plate load test procedure",
        "key_provisions": ["Plate sizes", "Loading procedure", "Settlement measurement", "Interpretation"],
        "latest_revision": "1982 (Reaffirmed 2016)"
      },
      {
        "code": "IS:2720 Part 11",
        "title": "Methods of Test for Soils - Triaxial Test (UU)",
        "scope": "Unconsolidated undrained triaxial test",
        "key_provisions": ["Sample preparation", "Test procedure", "Stress calculation", "Result interpretation"],
        "latest_revision": "1993 (Reaffirmed 2016)"
      },
      {
        "code": "IS:2720 Part 15",
        "title": "Methods of Test for Soils - Consolidation Test",
        "scope": "Oedometer consolidation test",
        "key_provisions": ["Load increments", "Time readings", "Compression parameters", "cv determination"],
        "latest_revision": "1986 (Reaffirmed 2016)"
      },
      {
        "code": "IS:2720 Part 40",
        "title": "Methods of Test for Soils - Free Swell Index",
        "scope": "Determination of swell potential",
        "key_provisions": ["Sample preparation", "Test procedure", "Classification of swelling"],
        "latest_revision": "1977 (Reaffirmed 2016)"
      },
      {
        "code": "IS:2720 Part 41",
        "title": "Methods of Test for Soils - Swell Pressure",
        "scope": "Determination of swell pressure of expansive soils",
        "key_provisions": ["Constant volume method", "Swell-consolidation method", "Result interpretation"],
        "latest_revision": "1977 (Reaffirmed 2016)"
      },
      {
        "code": "IS:14458 Part 1",
        "title": "Guidelines for Retaining Wall for Hill Area - Selection of Type of Wall",
        "scope": "Retaining wall type selection",
        "key_provisions": ["Wall types", "Selection criteria", "Height limitations", "Foundation requirements"],
        "latest_revision": "1998 (Reaffirmed 2017)"
      },
      {
        "code": "IS:14680",
        "title": "Guidelines for In-situ Vane Shear Test for Soils",
        "scope": "Field vane shear test procedure",
        "key_provisions": ["Vane dimensions", "Rotation rate", "Sensitivity determination", "Corrections"],
        "latest_revision": "1999 (Reaffirmed 2016)"
      },
      {
        "code": "IS:15284 Part 1",
        "title": "Design and Construction for Ground Improvement - Stone Columns",
        "scope": "Stone column ground improvement",
        "key_provisions": ["Installation methods", "Spacing and diameter", "Design methods", "Quality control"],
        "latest_revision": "2003 (Reaffirmed 2017)"
      }
    ],
    "international_standards": [
      {
        "code": "ASTM D1586",
        "title": "Standard Test Method for Standard Penetration Test (SPT)",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "Similar to IS:2131, includes energy correction methodology",
        "latest_revision": "2018"
      },
      {
        "code": "ASTM D5778",
        "title": "Standard Test Method for Electronic Friction Cone and Piezocone Penetration Testing",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "More detailed than IS:4968-Part 3, includes piezocone requirements",
        "latest_revision": "2020"
      },
      {
        "code": "ASTM D2850",
        "title": "Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "Equivalent to IS:2720-Part 11",
        "latest_revision": "2015"
      },
      {
        "code": "ASTM D4767",
        "title": "Standard Test Method for Consolidated Undrained Triaxial Compression Test",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "Equivalent to IS:2720-Part 12",
        "latest_revision": "2020"
      },
      {
        "code": "ASTM D2435",
        "title": "Standard Test Methods for One-Dimensional Consolidation Properties",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "Equivalent to IS:2720-Part 15, includes incremental loading and CRS methods",
        "latest_revision": "2020"
      },
      {
        "code": "ASTM D1143",
        "title": "Standard Test Methods for Deep Foundations Under Static Axial Compressive Load",
        "jurisdiction": "International (US origin)",
        "comparison_with_is": "More detailed than IS:2911-Part 4, includes multiple loading procedures",
        "latest_revision": "2020"
      },
      {
        "code": "Eurocode 7",
        "title": "EN 1997 - Geotechnical Design",
        "jurisdiction": "Europe",
        "key_features": ["Limit state design", "Partial factors", "Characteristic values", "Three design approaches"],
        "latest_revision": "2004 (under revision)"
      },
      {
        "code": "BS 8004",
        "title": "Code of Practice for Foundations",
        "jurisdiction": "United Kingdom",
        "key_features": "Comprehensive foundation design, now aligned with Eurocode 7",
        "latest_revision": "2015"
      },
      {
        "code": "BS 8006",
        "title": "Code of Practice for Strengthened/Reinforced Soils and Other Fills",
        "jurisdiction": "United Kingdom",
        "key_features": ["Reinforced earth design", "Basal reinforcement", "Bridge abutments"],
        "latest_revision": "2010"
      }
    ]
  },
  "code_mapping": {
    "spt_test": {
      "indian": ["IS:2131"],
      "astm": ["ASTM D1586"],
      "british": ["BS EN ISO 22476-3"],
      "notes": "IS uses 140lb (63.5kg) hammer; ASTM specifies safety hammer efficiency corrections"
    },
    "cpt_test": {
      "indian": ["IS:4968-Part 3"],
      "astm": ["ASTM D5778"],
      "british": ["BS EN ISO 22476-1"],
      "notes": "ASTM D5778 covers piezocone in detail; IS currently limited to mechanical cone"
    },
    "triaxial_test": {
      "indian": ["IS:2720-Part 11 (UU)", "IS:2720-Part 12 (CU/CD)"],
      "astm": ["ASTM D2850 (UU)", "ASTM D4767 (CU)", "ASTM D7181 (CD)"],
      "british": ["BS 1377-7", "BS 1377-8"],
      "notes": "Procedures largely similar; ASTM provides separate standards for each drainage condition"
    },
    "pile_design": {
      "indian": ["IS:2911 (all parts)"],
      "astm": ["ASTM D1143 (load test)", "ASTM D3966 (lateral)", "ASTM D3689 (tension)"],
      "british": ["BS 8004", "BS EN 1997-1"],
      "notes": "IS uses working stress approach; Eurocode uses limit state with partial factors"
    },
    "seismic_design": {
      "indian": ["IS:1893-Part 1"],
      "us": ["ASCE 7", "IBC"],
      "europe": ["EN 1998 (Eurocode 8)"],
      "notes": "IS:1893-2016 aligned with international practice; includes liquefaction assessment provisions"
    }
  }
}