Evaluation of the Strength Characteristics of Silty-Clayey Soils during Freezing-Thawing Cycles
Bragar E. Pronozin Y. Zhussupbekov A. Gerber A. Sarsembayeva A. Muzdybayeva T. Sarabekova U.Z.
January-2 2022MDPI
Applied Sciences (Switzerland)
2022#12Issue 2
Destructuring settlements due to frost heave during the structures’ exploitation are often not taken into account at the designing stage, although they are indirectly related to the bearing capacity of the soils. The objective of this research was analyzing the effect of the number of freezingthawing cycles on the strength characteristics of soils. A paired experiment with various initial parameters (void ratio, initial moisture content, and the number of freezing-thawing cycles) was carried out. According to the experimental results, the cohesion largely depends on the above parameters which might lead to its decrease by up to three times. The angle of internal friction demonstrated an indefinite behavior during the freeze-thaw cycles, which is confirmed by a literature review. Freezing–thawing cycles significantly decrease the soil bearing capacity: up to 44% after 10 freezing-thawing cycles for soil with e = 0.55 and w = 16.5%. However, in the case of e = 0.75 and w = 22.6%, it increased by 33%. A program based on the least-squares method was used to calculate the approximation coefficients of the dependence describing the changes in strength characteristics from the abovementioned parameters. Changes in strength characteristics must be taken into account when designing structures, as they can lead to additional settlement or even subsidence of the foundations.
Angle of internal friction , Cohesion , Freezing-thawing cycles , Silty-clayey soil , Soil moisture content , Void ratio
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Department of Structural Engineering, L.N. Gumllyov, Eurasian National University, Nur Sultan, 010008, Kazakhstan
Department of Construction Operations, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Department of Geotechnics, Saint Petersburg State University of Architecture and Civil Engineering (SPbGASU), Saint Petersburg, 190005, Russian Federation
Department of Soil Mechanics and Geotechnics, Moscow State University of Civil Engineering (MGSU), Moscow, 129337, Russian Federation
A.I. Proshlyakov Tyumen Higher Military Engineering Command College, Tyumen, 625001, Russian Federation
Department of Architecture and Design, S.Seifullin Kazakh Agro Technical University, Nur Sultan, 010011, Kazakhstan
Department of Electricity and Life Safety, Korkyt Ata Kyzylorda University, Kyzylorda, 120014, Kazakhstan
Department of Structural Engineering
Department of Construction Operations
Department of Geotechnics
Department of Soil Mechanics and Geotechnics
A.I. Proshlyakov Tyumen Higher Military Engineering Command College
Department of Architecture and Design
Department of Electricity and Life Safety
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