Method of Alignment of Tilts of Objects with Large-Size Foundations and Increased Loads on Them

The basic scheme for calculating the bases of large-sized foundations is, at present, a scheme of a linearly deformed layer of finite thickness. Calculations of the settlements, carried out according to the formula based on this scheme, still fully satisfied the practice of construction. A large operational experience and the results of long-term observations for the settlements of the foundations show that the actual settlements of the foundations much larger than the calculated values determined by the settlement calculation formula based on the theory of this model. The material of the actual settlements of the constructed objects on large-sized foundations under increased loads shows that the settlement curves consist of linear and non-linear sections. The linear section has a place for medium-compressible soils for the first half of the calculated average pressure P_IImt, i. e. at P_IImt≤ 250–300 kPa. When P_IImt is more than these values, the settlement speed begins to increase in the process of increasing the load to its full calculation value. Then the settlement speed decreases and the stabilization phase begins. The linear section of the settlement graph characterizes the process of soil compaction. The increase in settlement speeds in a nonlinear section should be explained by the increase in the role of horizontal displacements in the general deformation of the base. The fact that horizontal displacements play a significant role in the overall settlement of the structure is confirmed by numerous studies of the bases under reservoirs and embankments, and in small-scale experiments. The account of horizontal displacement makes it possible to bring the actual settlements maximally to the calculated ones.

N.S. SOKOLOV^1,2, Candidate of Sciences (Engineering), Associate Professor, Director (This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ OOO NPF «FORST» (109a, Kalinina Street, Cheboksary, 428000, Russian Federation)
² Chuvash State University named after I.N. Ulyanov (15, Moskovsky Avenue, Cheboksary, Chuvash Republic, 428015, Russian Federation)

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