Abstract:
Laboratory and experimental tests in huge amount are required during engineering surveys for
large and critical buildings and structures especially in complex geological conditions. The laboratory
investigations are applicable in cases with no possibility for field tests. However, as a rule the results
obtained from laboratory investigations (in particular compression tests) show conservative values of
deformation modulus, which leads to underestimate of soil foundations load-carrying capacity, cost increase
of foundations for buildings and structures as well as significant overrun of expensive construction materials.
The paper shows laboratory tests results (compression and stabilometric) for unixial and triaxial compression
of soil samples; results of field plate-load tests for vertical pressed load over natural soil massif. It also brings
comparison of stress-strain properties obtained by results of compression, stabilometer and plate-load tests
with derivation of regional correction factors for Nur-Sultan City (Kazakhstan). In case of using the
recommended regional coefficients while determining the overall deformation modulus by laboratory tests, a
significant economic effect is achieved as a result of cost reduction for materials and construction of
foundations for buildings and structures.
