Forces and Deformations in a Pile Field with a Solid Grillage Slab

Some modern buildings and structures may have non-standard architectural and planning solutions: complex shapes in plan and height, sections with different storeys, underground space with different depths of laying, unequal distances between load-bearing elements, overlaps at different elevations, etc. All these features lead to uneven transfer of loads to the foundations and the formation of local areas where edge stresses and deformations are concentrated. If, at the same time, the engineering and geological conditions of the site are represented by weak soils of considerable capacity (15–20 m or more), then the most optimal foundation will be a pile field with a solid grillage plate. The bearing capacity and deformations of a pile field with a solid grillage plate are largely determined by the characteristics of the bearing layer of the soil under the heel of the piles, the rigidity of the piles and the distribution of loads from the structure. These parameters, in turn, depend on the choice of the bearing layer of soil under the heel of the piles, the geometric parameters of the pile field (length, diameter, pitch of the piles) and the structural features of the building. This article presents the sequence of foundation design for a building with complex architecture and loads in order to obtain the most optimal distribution of forces and deformations in a pile field.

V.V. KONYUSHKOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Saint-Petersburg State University of Architecture and Civil Engineering (4, Vtoraya Krasnoarmeiskaya Street, Saint-Petersburg, 190005, Russian Federation)

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