Magazine of Civil Engineering

RAR RUS 13401-13401 Peter the Great Saint Petersburg Polytechnic University Kolosova Natalya po.isf@cef.spbstu.ru

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Evgeny Kolosov eskol@cef.spbstu.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great Saint Petersburg Polytechnic University Ptuhina Irina irena_ptah@mail.ru

Polytechnicheskay, 29

Enigma-S, LLC Rineyskaya Anastasiya aarin@mail.ru

St. Petersburg, Russian Federation

Reconstruction of a moss layer in permafrost conditions The object of research in this work is the relationship between the feasibility of secondary use the moss layer and the thermal characteristics of an oil pipeline, which was laid underground in permafrost conditions. The purpose of the work is to determine the expediency of the secondary use of the moss layer with underground laying of the pipeline in the permafrost conditions. The choice of the object and purpose of the study is motivated by the intensive development of territories with permafrost soils, by the relevance of problems related to the construction and operation of the energy transport system, by its impact on the ecological development of the permafrost zone and by the need for further research aimed at solving these problems. The following tasks were formulated to achieve this goal: a) to determine the main thermal factor affecting the expediency of the secondary use of the moss layer; b) to consider the possibility of restoring the moss layer at various permafrost soils; c) to determine the feasibility of restoring the moss layer for underground laying pipeline with various types of energy resources; d) to determine the economic component of the secondary use of the moss layer. The equivalent of the Zapolyarye–Purpe Oil pipeline theoretical model of the underground oil pipeline is presented in this work for research. The inexpediency of the secondary use of the moss layer in the underground laying of the oil and gas pipeline is justified by the thermal and economic characteristics of the soil. Future considerations of this topic are related to the study of the economic indicators of underground pipelines in conditions of multi-layered permafrost soils. 10.34910/MCE.134.1 624.139.53 moss layer pipeline permafrost conditions secondary use permafrost soils underground oil pipeline https://engstroy.spbstu.ru/article/2025.134.1/

RAR RUS 13402-13402 College of Science and Engineering, James Cook University To Peter peter.to@jcu.edu.au

Douglas, Towns-ville, Queensland, Australia

https://orcid.org/0000-0002-4928-6236 Thuyloi University Pham Ngoc Thinh thinhtls@tlu.edu.vn

Dong Da, Hanoi, Vietnam

Application of various binders in soil stabilisation for road batter protection The study investigates the use of various binders for soil stabilization to enhance road batter protection under extreme hydraulic conditions. Flash floods and high-velocity water flows in rural areas often lead to significant erosion, posing challenges for infrastructure sustainability. This research aimed to identify cost-effective and efficient binder combinations suitable for protecting soil surfaces against severe erosion. Disturbed soil samples were mixed with agricultural lime, gypsum, and triple blends at varying proportions and subjected to controlled weathering and flume tests at velocities of up to 2 m/s. The results revealed that triple blends, at proportions of 2 % and 3 %, demonstrated the most effective erosion resistance, with unconfined compressive strengths exceeding 1 MPa. In contrast, gypsum showed limited efficacy due to uneven binding distribution. The study concludes that optimal binder selection and application can significantly reduce erosion susceptibility, offering a sustainable solution for rural infrastructure protection. 10.34910/MCE.134.2 624.131.4 soil stabilisation road batter flood protection lime tripple blends gypsum binder https://engstroy.spbstu.ru/article/2025.134.2/

RAR RUS 13403-13403 7004708164 0000-0003-2186-1881 Moscow State University of Civil Engineering (National Research University) Shitikova Marina shitikova@vmail.ru

Moscow, Russian Federation

0000-0001-5679-9542 Moscow State University of Civil Engineering (National Research University) Smirnov Vladimir SmirnovVA@mgsu.ru

Moscow, Russian Federation

Analysis of rheological model parameters for various foamed vibration-damping materials The study presents an experimental and analytical investigation of foamed polyurethane viscoelastic materials with varying density and pore structures, focusing on their dynamic mechanical behavior relevant for vibration damping applications. Samples with distinct pore configurations (open, closed, and combined) and varying densities (165–380 kg/m3) were subjected to resonance-based dynamic tests under static loads of 2, 5, and 10 kPa. The dynamic modulus of elasticity and damping characteristics, including loss factor, fractional damping parameters, and relaxation times, were determined. Results indicated that damping properties are strongly influenced by material density and internal pore structure, with closed-pore materials exhibiting lower damping capacities compared to materials with open or combined pores. A Fractional Standard Linear Solid (FSLS) model was effectively utilized to characterize the observed nonlinear viscoelastic behaviors, successfully correlating experimental data through parameter identification methods. The findings confirm that increased density generally enhances the dynamic modulus while reducing damping capacity, whereas pore structure significantly affects the material's dynamic response. These insights validate fractional derivative models as efficient predictive tools, facilitating the optimized design of viscoelastic isolation systems for engineering structures. 10.34910/MCE.134.3 534.1 viscoelastic materials fractional derivatives resonance testing dynamic modulus loss factor material density pore structure polyurethane foam damping properties rheological modeling https://engstroy.spbstu.ru/article/2025.134.3/

RAR RUS 13404-13404 St. Petersburg Federal Research Center of the Russian Academy of Sciences Dashevsky Vladimir vladimir.dashevsky@gmail.com

St. Petersburg, Russian Federation

State Research Institute of Industrial Ecology Kondratieva Victoria v.kondrateva@promeco-inst.ru

Moscow, Russian Federation

St. Petersburg Federal Research Center of the Russian Academy of Sciences Rzhimsky Vasily vladimir.dashevsky@strategic-it.ru

St. Petersburg, Russian Federation

St. Petersburg Federal Research Center of the Russian Academy of Sciences Ronzhin Andrey ronzhin@iias.spb.su

St. Petersburg, Russian Federation

Detection of unauthorized connections to storm drains based on passive radio frequency identification technology The paper presents the results of research on using radio frequency identification (RFID) technologies to prevent pollution by enabling early detection of industrial discharges. The goal of the study is to develop a method for detecting unauthorized connections to storm sewers using passive RFID technology. The authors justify the choice of passive RFID, based on the EPC Class 1 Gen2 standard (ISO/IEC 18000-63:2021(E)). The authors describe experiments to reliably detect RFID tags floating in protective casings on the water’s surface by reader with the antenna positioned 0.5–1.5 m above the water. A key challenge is the difficulty in reading tags directly on the water’s surface, as water shields and reflects the reader’s electromagnetic waves. Additional tests were conducted to evaluate the impact of tag collisions on the accuracy and completeness of readings, as these collisions may cause missed tags when passing by the reader’s antenna. The study confirms that passive RFID can address key challenges in detecting unauthorized storm sewer connections. RFID technology has the potential to improve the efficiency and accuracy of environmental monitoring, reduce control costs, and better protect water bodies from industrial pollution. The research is significant for advancing new methods and technologies in environmental protection and can be applied in state environmental control systems to identify and prevent unauthorized wastewater discharges from industrial facilities. 10.34910/MCE.134.4 004.6:621.396.6:628.1/.3 storm drains wastewater RFID radio frequency identification unauthorized connections protection of water bodies state environmental control discharges from industrial enterprises https://engstroy.spbstu.ru/article/2025.134.4/

RAR RUS 13405-13405 0000-0001-9840-4414 V.G. Shukhov Belgorod State Technological University Zagorodnyuk Lilia lhz47@mail.ru

Belgorod, Russia

0000-0002-8451-4716 Belgorod State Technological University named after V.G. Shukhov Sytov Gleb sytov2024@icloud.com

Belgorod, Russian Federation

0009-0000-2353-1697 Belgorod State Technological University named after V.G. Shukhov Bogdanov Vsevolod Bogdanov_vsevolod@mail.ru

Belgorod, Russian Federation

Tomsk State University of Architecture and Building Kudyakov Aleksandr kudyakow@mail.tomsknet.ru Granular aggregate for fill mortars using blast furnace slag The technology of underground mining is one of the most promising areas of the mining industry. The use of technogenic waste, as well as unclaimed and substandard raw materials for the production of fill mortars in all over the world is an urgent problem in ecology and materials science. Research on obtaining the compositions of backfill mortars with different contents of blast furnace slag is presented. Mechanical activation of raw mixtures for granular aggregates was carried out in a vortex jet mill. A method for preparing raw material granules in a disc granulator has been developed. It has been established that when using a disc granulator, the following yield of aggregate fractions has been obtained: the number of fractions up to 8 mm is 30 %, fractions up to 6 mm – 27 %, fractions 2–4 mm – 43 %. It has been marked that granular aggregates using a slag fraction of 2.5 mm (composition 1) have the greatest strength of 3.73 MPa. When the fraction size increases up to 5 mm (composition 1), the strength of the granules decreases by 12.01 % and amounts to 3.33 MPa. The structure formation of solutions with different types of granular aggregates has its own characteristics, which are determined by the slag fraction, composition and water-binding ratio, as well as the condition of strength gain. 10.34910/MCE.134.5 691.5 granular aggregates disc granulator vortex jet mill filling solutions https://engstroy.spbstu.ru/article/2025.134.5/

RAR RUS 13406-13406 56056531000 0000-0002-9133-8546 Don State Technical University Chepurnenko Anton anton_chepurnenk@mail.ru

Rostov-on-Don, Russia

54950122700 0000-0002-5205-1446 Don State Technical University Yazyev Batyr ps62@yandex.ru

Rostov-on-Don, Russia

0000-0001-6182-786X Don State Technical University Al-Zgul Samir samiralzgulfx@gmail.com

Rostov-on-Don, Russian Federation

57214067410 0009-0001-6399-401X Don State Technical University Turina Vasilina vasilina.93@mail.ru

Rostov-on-Don, Russian Federation

Simplified finite element model for rectangular CFST columns strength calculation under eccentric compression Concrete filled steel tubular (CFST) column is one of the most effective building structures types that combine high bearing capacity and economy. Three-dimensional nonlinear finite element analysis is the most common and reliable method for determining the bearing capacity of CFST columns. This approach is usually applied to individual elements and is not suitable for calculating buildings and structures with CFST elements as a single whole, due to high computational complexity. The purpose of the article is to develop a simplified model that allows reducing a three-dimensional problem of calculating a CFST column to a two-dimensional one. Rectangular CFST columns subjected to eccentric compression with eccentricity in two planes are considered. The problem dimension is reduced based on the hypothesis of plane sections. Rectangular elements are used for the concrete core and one-dimensional bar elements are used for the steel pipe. The developed model was verified by comparing calculation results with the results of three-dimensional finite element modeling in ANSYS. The maximum discrepancy between the results for stresses was 2.3 %. The model was also validated on experimental data for 38 samples presented in 3 different papers. The proposed model allows to significantly reduce the machine time costs when calculating CFST columns in a physically nonlinear formulation. 10.34910/MCE.134.6 624.04 finite element method numerical models tubular steel structures reinforced concrete mechanical performance compressive strength https://engstroy.spbstu.ru/article/2025.134.6/

RAR RUS 13407-13407 0009-0003-2248-312X Abylkas Saginov Karaganda Technical University Beketova Moldir moldir-9292@mail.ru