Mokritskaya T.P., Tushev A.V. On some soil subsidence estimations based on the particle size distribution

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 143

Geoteh. meh., 2018, 143, 118-126

https://doi.org/10.15407/geotm2018.143.118

ON SOME SOIL SUBSIDENCE ESTIMATIONS BASED ON THE PARTICLE SIZE DISTRIBUTION

¹Mokritskaya T.P., ¹Tushev A.V.

¹Dnipro National University named by O. Gonchar

UDC 624.131.4 (477)

Languige: English

Annotation.

In our previous investigations we studied subsidence of soils, which are alluvial, alluvial-dealluvial loess-like deposits of the Middle-Upper Pleistocene age, lying on the Right-Bank Loess and Upland Plain (Middle Dnieper, Ukraine). In this paper we study Neogene clays. Under some additional conditions of fractal nature of the loess soil, obtained certain predictive estimations of the coefficient of porosity after the disintegration of micro-aggregates. We discovered that under such conditions two different situations of particles packing may occur after disintegration of micro-aggregates. Let k′ be the coefficient of porosity and K′ be the porosity of the soil after the disintegration of micro-aggregates. These situations strongly depend on the fractal dimension of particle distribution by size. The results of our experiments and calculations show that on the basis of the new theoretical models and the "Microstructure" technique, having the values of the fractal dimension of the particle size distribution, it is possible to forecast the volume deformations after the disintegration of the micro-aggregates. With dispersed and semi-dispersed methods of preparation, the micro-aggregates disintegration occurs, resulting in increased content of fractions less than 0.01 mm. Unlike loess soils, with the semi-dispersed method of preparation, increased content of clay particles is characteristic for red-brown clays. Depending on the type of loess soil and specific experimental conditions, there may be the subsidence deformation, swelling or suffusion. By using the results obtained, we study properties of undifferentiated Neogene-Lower Quaternary, Neogene clays selected in Nikopol and Kamenskoye. The predicted values of the porosity coefficient will vary from 0.499 to 0.635 for different types of exposure, accompanied by the decomposition of aggregates. The most resistant to different types of impacts were undifferentiated Neogene-Lower Quaternary red-brown clays. The method allows you to develop a new classification of soils, based on the stability of the soil structure as the stability of micro-aggregates.

Keywords:

loess, fractal, porosity, deformation, granulometric analysis

References

1. Russell A.R. (2011), "A compression line for soils with evolving particle and pore size distributions due to particle crushing", Geotechnique Letters, no. 1, pp. 5-9.

https://doi.org/10.1680/geolett.10.00003

2. Russell A. R. (2010), "Water retention characteristics of soils with double porosity", Eur. J. Soil Sci. , 61, no. 3, pp. 412-424.

https://doi.org/10.1111/j.1365-2389.2010.01237.x

3. Mokritskaya T. P., Anatoliy V. Tushev, Evgeny V. Nikulchev and Ksenia A. Samoylich. (2016), "On the Fractal Characteristics of Loess Subsidence". Contemporary Engineering Sciences , no. 9 (2), pp. 799 - 807.

https://doi.org/10.12988/ces.2016.6687

4. Mokritskaya, T.P., Tushev, A.V., Samoylich, K. A. et al. (2018), "Deformations of loess soils caused by changes in the microaggrega-te structure", Bull Eng Geol Environ., available at: https://doi.org/10.1007/s10064-018-1361-z.

https://doi.org/10.1007/s10064-018-1361-z

5. Zhang J. and B. Zhang (2018), "Fractal Pattern of Particle Crushing of Granular", Advances in Civil Engineering, Vol. 2018, Article ID 2153971.

https://doi.org/10.1155/2018/2153971

6. Seblany F. [et al.] (2018), "Merging criteria for defining pores and constrictions in numerical packing of spheres", Granular Matter, no. 20, p. 37.

https://doi.org/10.1007/s10035-018-0808-z

7. Amezketa E. (1999), "Soil Aggregate Stability: A Rewiew", Jornal of Sustainable Agricalture, no. 14(2/3), pp. 83-151.

https://doi.org/10.1300/J064v14n02_08

8. McDowell G. R., Bolton M. D. and Robertson D. (1996), "The fractal crushing of granular materials", J. Mech. Phys. Solids , 44, no. 12, pp. 2079-2102.

https://doi.org/10.1016/S0022-5096(96)00058-0

9. Coop M. R., Sorensen K. K., Bodas Freitas T. and Georgoutsos G. (2004), "Particle breakage during shearing of a carbonate sand", Geotechnique , 54, no. 3, pp. 157-163.

https://doi.org/10.1680/geot.2004.54.3.157

10. Einav I. (2007), "Breakage mechanics - part I: Theory", J. Mech. Phys. Solids, 55, no. 6, pp. 1274-1297.

https://doi.org/10.1016/j.jmps.2006.11.003

About the authors

Mokritskaya Tetiana Petrivna, Doctor of Geology (D.Sc.), Associate Professor of the Department of Geology and Hydrogeology, Professor of the Department Sciences about Earth, DNU named byOles Honchar, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Tushev Anatoliy Volodymyrovych, Doctor of Physics and Mathematics (D.Sc.), Professor, Professor of the Department of algebras and geometries, DNU named by Oles Honchar, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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