Geotechnical Data for Transportation Infrastructure. Tim Spink, Mott MacDonald

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1 Geotechnical Data for Transportation Infrastructure Tim Spink, Mott MacDonald

2 The transportation geotechnical asset Foundations Tunnels Road & track bed Earthworks Also supports: communication lines noise barriers landscaping

3 Earthworks ~1/3rd cutting ~1/3rd embankment ~1/3rd total asset value Aging asset

4 Rock falls

5 Soil slips

6 Geotechnical asset deterioration Network Development Initial Deterioration Deterioration / Maintenance Cycles Fixed Asset Value If failure Maximum Serviceability State Minimum Serviceability State Time Time of optimal maintenance action

Improved asset knowledge Systematic surveys Standardised

7 Reactive >> proactive maintenance Benefits Improved safety Reduced disruption 80% less maintenance cost Requirements Improved asset knowledge Systematic surveys Standardised procedures GIS/database asset management systems Standard data formats

8 CIRIA geotechnical data formats review Project Stages Conceptual/feasibility studies Investigations Strategic: (Preventative/ improvement) or Tactical: (Remediation) Design Construction Maintenance Management Decommissioning

CIRIA geotechnical data formats review Project Stages Conceptual/feasibility studies Data types Preliminary sources study data Aerial photographs Topographic surveys Digital terrain models/lidar etc

9 CIRIA geotechnical data formats review Project Stages Conceptual/feasibility studies Data types Preliminary sources study data Aerial photographs Topographic surveys Digital terrain models/lidar etc Strategic: (Preventative/ improvement) or Tactical: (Remediation) Investigations Design Construction Intrusive geotechnical Geophysical Geochemical Monitoring etc Ground models Design parameters Design details based on the above Main works contractor: Compliance testing data Construction record/drawings Feedback reports Specialist sub-contractor: Tunnelling, piling, dewatering, strengthening, ground improvement records etc Maintenance Management Managing Agents & specialist survey contractors Geotechnical asset condition/inventory data Related assets: drainage, structure, pavement etc Decommissioning

10 CIRIA geotechnical data formats review Data types Preliminary sources study data Aerial photographs Topographic surveys Digital terrain models/lidar etc Available Data Transfer Formats Documents: Word, PDF etc Proprietary images formats Drawings: DWG, DGN, DXF etc Proprietary DTM formats: LAS, MX etc Intrusive geotechnical Geophysical Geochemical Monitoring etc Ground models Design parameters Design details based on the above AGS data Various geophysical transfer formats: LAS, SEG-Y etc Geochemical transfer formats: EQUIS etc Drawings: DWG, DGN, DXF etc Spreadsheets: Excel etc Documents: Word, PDF etc Main works contractor: Compliance testing data Construction record/drawings Feedback reports Specialist sub-contractor: Tunnelling, piling, dewatering, strengthening, ground improvement records etc Drawings: DWG, DGN, DXF etc Spreadsheets: Excel etc Documents: Word, PDF etc Managing Agents & specialist survey contractors Geotechnical asset condition/inventory data Related assets: drainage, structure, pavement etc Drawings: DWG, DGN, DXF etc Spreadsheets: Excel etc Documents: Word, PDF etc Databases: MDB, DBF etc

11 Supported data formats 1600 geotechnical / geological etc software programs 120 data formats Petroleum Geoscience Mapping and GIS Images Format Type Geotechnical Geophysics Geological Geoenvironmental Documents Database and Spreadsheet Asset Count

12 Most popular supported formats Format Name DXF Excel Windows bitmap Windows metafile Access Word JPEG M IF / M ID Tagged Image File AGS Zsoft Paint Comma Separated Values dbase HPGL Graphics Interchange Format LAS DEM Rich Text Format Paradox LIS/LIS Count

13 Geotechnical / geological / geophysical formats Ground investigation Monitoring Scope Design Construction Asset management Hazard Count

14 Geotechnical data transfer needs Lack of standard approach for transfer of:- Documents, mapping/gis, drawings Lack of standard specialist formats for:- Transfer of conceptual/feasibility/desk study info Transfer of interpretative data interpretative ground models design/analysis models design data Transfer of construction information as built records piling feedback information Transfer of geotechnical asset data

Example geotechnical asset data format UK Highways Agency 9400km of motorway & trunk roads 6000km of earthworks Valued at 20 billion Maintained by contractors Standard procedures HD41

15 Example geotechnical asset data format UK Highways Agency 9400km of motorway & trunk roads 6000km of earthworks Valued at 20 billion Maintained by contractors Standard procedures HD standard 5 year inspection cycle Risk based assessment Standard tools Internet GIS asset management system (HAGDMS) Handheld field data capture device (PocketGAD) GADML data format

16 Earthworks and observations

17 GADML for Geotechnical Asset Data GML compatible XML format Inspections Who When Where Survey equipment & accuracy Earthworks Type (embankment, cutting, bund, at-grade) Earthwork extents Geology Attached sketches or photographs Observations Start and end of observation Geometry (height & angle) Defects, vegetation, water, drainage, reinforcement Attached sketches or photographs

18 Field surveys Data round-trips Server GADML Field survey GADML Server Inventory & condition Maps, aerial photos & forms GPS Photos & sketches Data validation

19 HA GDMS data interchange Users: HA & Agents Internet Browser User Interface: - Map - Text Query Manager Contacts Database Reports Database Boreholes Database BGS Borehole Database Geotechnical Asset Database XML format Scanned archive documents Attached Documents Offline HA PDF Toolkit PDF and XML format Offline creation of electronic documents Attached Documents AGS format Offline geotechnical database AGS format validator Summary Maps Attached Documents Other HA systems GADML format As-built records GMF Parts A, B and C Field data capture device Automated geometry population

20 DIGGS DIGGS International Governing Body DIGGS Technical Steering Committee (formed out of existing Data Coalition) North America (current GMS) UK (AGS) Hong Kong (HK AGS) Ground investigation (current WP) Foundations (current WP) 2D & 3D (offshoot from current WP) Netherlands Sweden Australia Geophysics (offshoot from current WP) Geoenvironmental Geotechnical Asset Data (including GADML) Denmark Japan etc Technical Special Interest Groups Country Special Interest Groups

Detection of Slope Instability using 3D LiDAR Modelling

Detection of Slope Instability using 3D LiDAR Modelling Duffell CG 1, Rudrum DM 2 and Willis MR 3 1 Technical Adviser (Geotechnics), Highways Agency. City Tower, Piccadilly Plaza, Manchester, M1 4BE, United