108th OGC Technical Committee GeoValML The exchange format for parameters and values of soils and rocks 108th OGC Technical Committee Stuttgart, Germany Eberhard Kunz 12th September 2018 Copyright © 2018 Open Geospatial Consortium

BAW 2017 BAW 2017 Eberhard Kunz Nebojsa Balic GeoValML The exchange format for parameters and values of soils and rocks 108th OGC Technical Committee - Stuttgart Stuttgart, 12th September 2018

motivation & objective concept modelling first steps & next steps topics motivation & objective concept modelling first steps & next steps discussion GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

motivation & objective determination of soil- and rockmechanical parameters and values: parameters and values of soils and rocks are important for every building project the surveys of the parameters are time and cost-intensive. the scattering of values of determined parameters can be high in consequence of sampling, test procedures or geogenic reasons “comparable experience” (Eurocode 7 Geotechnical design - Part 1): the term “comparable experience” is defined as documented or other clearly established information related to the ground being considered in design, involving the same types of soil and rock the selection of characteristic values for geotechnical parameters shall be based on results and derived values from laboratory and field tests, complemented by well- established experience GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

motivation & objective public authorities and universities maintain database systems or local data repositories a consolidated data collection or database system to be used for validation is not available the necessary infrastructure is not existent a standardized format for the geotechnical parameters would help the exchange of heterogeneous and disperse geotechnical values and parameters stored in the in heterogeneous database systems GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

concept keep an eye on: data security expandability user demand parameters, values schema new standard liability privacy licence (CC BY ??) technology plausibility check operating costs … … … GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

concept for the implementation of the GeoVal database the generic schema by “observations & measurements” (O & M) will be used the schema was transferred to the standard DIN EN ISO 19156:2013-10 (Geographic information - Observations and measurements). there are some adaptations necessary to match the parameters and values to the generic schema matching the geotechnical part from the data to the relevant feature types and classes of O & M advantages to use O & M – schema: International Standard standardized generic schema generally accepted GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

concept data sets geotechnical values and parameters  results from laboratory tests (strength, stiffness, classification, …) derived geotechnical values and parameters  homogeneous area German construction contract procedures (VOB) geotechnical field measurements (density-log, shear wave velocity, CPT…) data for further development of constitutive laws GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

concept spatial data: point in 3D (laboratory tests) line in 3D (laboratory tests / field test like CPT) plane area in 3D (homogeneous area) volume  (BIM - Building information modelling / homogeneous area) GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

concept sampling … exploration point drilling point subsample depth exploration point drilling point exploration path borehole path sample from – to or (mid)point sampling point / line / volume? triaxial test (four subsamples) watercontent (one subsample) lime content (one subsample) laboratory test (n subsamples) … GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

modelling geotechnical parameters and values (draft) BAW 2018 GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

modelling geotechnical parameters and values (draft) process/test BAW 2018 sample +Metadata process/test +standard +boundary conditions +dataprovider dataprovider +laboratory +Institute observation +description +Time/Date +plausibility check classification (string) numerical (string & Unit) matrix column: n row: n GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

modelling geotechnical parameters and values (draft) – examples determination of water content standard: DIN EN ISO 17892-1:2014-03 boundary condition: 107,5°C (drying temperature), … parameters and values: 25,8% (watercontent), … classification standard: DIN 18196:2011-05 (or ASTM….) boundary condition: - parameters and values: TM (medium plastic clay) determination of particle size distribution standard: DIN EN ISO 17892-4:2017-04 boundary condition: - parameters and values: GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

modelling geotechnical parameters and values (draft) – examples consolidated triaxial compression test on water saturated soils calculations for effective shear strength (a minimum three subsamples are needed) standard: DIN EN ISO 17892-9:2017 boundary condition: calculation specification parameters and values: 32,5° (effective friction angle) 15,8 kN/m² (effective cohesion) Subsamples (data of n subsamples) boundary condition: 500 kN/m² consolidation stress 400 kN/m² backpressure 300 kN/m² confining pressures parameters and values: 420 kN/m² maximum of (s1-s3)/2 9,8 % (strain at the maximum of (s1-s3)/2 ) …. GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

first steps & next steps requirement analysis database of geotechnical values and parameters user interface … privacy possible interface to BoreholeML design (and implementation) of the IT Infrastructure mapping geotechnical values and parameters to Observations & Measurements (O&M) modelling GeoVal on the base of Observations & Measurements GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

discussion BAW 2018 GeoValML | Eberhard Kunz, Nebojsa Balic 12.09.2018

BAW 2017 BAW 2017