Author 1:
Name & Surname: Saenko Yu. V.
Company: Northern (Arctic) Federal University (Arkhangelsk, Russia)
Work Position: Postgraduate student
Contacts: yuri_saenko@mail.ru

Author 2:
Name & Surname: Nevzorov A. L.
Company: Northern (Arctic) Federal University (Arkhangelsk, Russia)
Work Position: Professor, Head of Engineering Geology Department
Scientific Degree: Doctor of Engineering Sciences

The article describes estimation procedures and data on deformation and strength characteristics of marine and glacial loam soil used to make basis for piling foundations in the city of Arkhangelsk. Apart from the deformation modulus, internal friction angle and cohesion that are conventionally determined in compression and single-plane shear testing using standard procedures, the estimation involved loading–relaxation modulus and secant modulus under triaxial compression, shear modulus under failure, secant modulus of a specimen with 50% strength under pure shear (cutting) and an odometer overconsolidation ratio. The listed characteristics are required for numerical simulation of complex object foundations using various complexity models of soils, such as Coulomb–Mohr and hardening soil models, with the help of Plaxis software tools. The test benches allowed automated-mode determination of the complete spectrum of deformation and strength characteristics of soils with output data recording at any frequency. The authors have derived correlation dependences between deformation and strength characteristics and physical properties of marine and glacial loam soil, as well as related the odometric modulus of deformation, loading–relaxation modulus and secant modulus. It is revealed that calculation of piling foundation subsidence in accordance with the current standards uses the value of shear modulus that is valid for soil with the load-bearing capacity outspent by more than 50%. The calculations with the use of the derived relations and correlation dependences for marine and glacial loam soil will considerably reduce the scope and cost of geological engineering survey in architectural engineering.

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