Optimization of injection mortars for stabilization of soft base of operating subgrade in permafrost region
https://doi.org/10.46973/0201-727X_2025_1_8
Abstract
The article considers the problems of construction and maintenance of road facilities in the permafrost region related to the degradation of permafrost soils and the formation of soft soils at the base of structures. For stabilization of soft soils in the considered conditions it is proposed to use the method of pressure injection of soil-cement mortars in the mode of hydraulic fractures, overcoming its main disadvantages by optimizing the compositions of the mixtures used. The main direction of optimization is substantiated – reduction of the amount of cement used in mortars, which will reduce their cost, as well as the amount of associated heat generation, additionally thawing permafrost soils in the base.
Laboratory tests were supplied and carried out, which allowed to determine the dependence of the main characteristics of soil-cement injection mortars on the amount of cement (in the minimum possible range of values), as well as to determine the minimum binder concentration that provides the stability of the mixture and hardened mortar.
An algorithm for optimizing the compositions of injection mortars for stabilizing soft bases of the operating subgrade sections under the considered conditions is proposed.
Keywords
About the Authors
D. A. Razuvaev
Siberian State Transport University (STU)
Russian Federation
Russian Federation
Razuvaev Denis Alekseevich, Chair “Research, Design and Construction of Railways and Highways”, Candidate of Engineering Sciences, Associate Professor
R. S. Pechenkin
Siberian State Transport University (STU)
Russian Federation
Russian Federation
Pechenkin Roman Sergeevich, Chair “Railway and Railroad Facilities”, Postgraduate Student
A. L. Lanis
Siberian State Transport University (STU)
Russian Federation
Russian Federation
Lanis Alexey Leonidovich, Chair “Railway and Railroad Facilities”, Doctor of Engineering Sciences, Professor, Head of Chair
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Review
For citations:
Razuvaev D.A., Pechenkin R.S., Lanis A.L. Optimization of injection mortars for stabilization of soft base of operating subgrade in permafrost region. Vestnik Rostovskogo Gosudarstvennogo Universiteta Putej Soobshcheniya. 2025;(1):8-16. (In Russ.) https://doi.org/10.46973/0201-727X_2025_1_8
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