The application of boundary element method to the determination of settlement of circular in plan foundation constructions of granaries
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 66
Abstract
Design and reconstruction of buildings on soft loess soils are associated with the problem of ensuring acceptable according to regulatory documents settlement values of these buildings. The main soil parameter that affects the accuracy of the forecast of the settlement of foundations of buildings is a modulus of deformation E of each layer of soil in the area of the compressed thickness. Determination of the deformation modulus is one of the key issues for moistened loess soils. In the laboratory conditions the modulus of soil deformation is determined by its compaction by static load without the possibility of lateral expansion (in a rigid ring). The disadvantage of the compression research is the decrease of the vertical pressure which is applied to the sample due to frictional forces against the walls of the ring. A more reliable method of determining the deformation modulus is the field investigation by cliches. According to the field and laboratory data comparisons E increasing coefficients have been introduced into the laboratory research. Correctness of the introduction of the increasing coefficients to the modulus of soil deformation obtained on the basis of compression research for soaked loess soils is considered in the paper. To determine the reliability of the two approaches to determine the modulus of the ground deformation the calculation was done according to the numerical boundary element method by using the elastic plastic model of the settlement of grain silos foundations on adverse loess soils taking into account the modulus magnifying factor of soil deformation and without it. Numerical research results are compared with the calculation according to the finite element method and the experiment.
Authors and Affiliations
A. S. , Morgun, V. Y. , Plyasovytsya, R. I. , Malachkovska
Keywords
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