Geotechnics fundamentals and applications in construction: new materials, structures, technologies and calculations : proceedings of the international conference on geotechnics fundamentals and applications in construction: new materials, structures, technologies and calculations (GFAC 2019), Saint Petersburg, Russia, 6-8 February 2019 : international scientific-technical conference <<geotechnics fundamentals and applications in construction: new materials, structures, technologies and calculations>> : Feb 2019, Saint Petersburg, Russia.