The National Geotechnical Experimentation Sites Database

Abstract

Research quality data from geotechnical tests conducted at the designated National Geotechnical Experimentation Sites (NGES) are currently available in a database accessible through the Internet. The data include general site information, stratigraphy, laboratory and in situ test details. The database is structured to follow the rules of Relations Database Management Systems (RDBMS). The database resides in a Unix based Sun Solaris server and the database engine is Sybase RDBMS. The NGES database user interface query application has been developed for the Internet using Java as the programming language and runs under any Internet capable browser. The application uses Java applets to communicate with the database server. The interface comes with user-friendly query capabilities along with graphic display of various results in tabular and chart forms. The user community includes researchers, students, and practicing engineers in geotechnical and geo-related fields.

Development of a 3D GIS database model for geotechnical analysis incorporating geostatistics

“…The information are obtained from a desk study at the feasibility stage of the project before any ground investigation has started, and can be referred by specific layers identified at a later stage, either during or after the ground investigation. Another characteristic of this database model is the structuring of the soil description in the relational (Satyanarayana & Benoit, 2001) The NGES database is developed with a view to provide a central data repository for the data acquired at the NGES sites. Figure 3-3 NGES database structure (after Satyanarayana & Benoit, 2001) • Boreholes…”

“…Another characteristic of this database model is the structuring of the soil description in the relational (Satyanarayana & Benoit, 2001) The NGES database is developed with a view to provide a central data repository for the data acquired at the NGES sites. Figure 3-3 NGES database structure (after Satyanarayana & Benoit, 2001) • Boreholes…”

“…Spatial analysis raises the requirement for a spatial dataset, the database reported by Ansary et al (1999) presented a preliminary solution to cope with such a requirement. The early application of GIS generally involved using maps to access borehole through a identifiers, the database was integrated with the GIS through a link between the database (Lee etai, 1990) GeoTec Database of SIGMA (Oliver & Toll, 1996) NGES-National Geotechnical Experimentation Sites Database (Satyanarayana & Benoit, 2001) Interactive Database of Soil Strength Parameters (Ansary et al 1999) USGS Geologic Site Database (Ponti, 2001) A Geotechnical Database for Seismic Hazards Mapping in California (Real & McGuire, 2001) ROSRINE Database (Nigbor et al, 2001) A Database for Island ofOahu, Hawaii (Oloufa et al, 1992;Oloufa et al, 1994) WELLHEAD for Dane County, Wisconsin (Adams et al, 1993) GeSEP of Bangkok Subsoil (Suwanwiwattana et al, 2001)…”