Stability of the Railway Subgrade under Condition of Its Elements Damage and Severe Environment

Kovalchuk, Vitalii; Sysyn, Mykola; Nabochenko, Olga; Pentsak, Andriy; Voznyak, Oleg M.; Kinter, Stepan O.

doi:10.1051/matecconf/201929403017

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…In studies [4,21], numerical methods were applied to establish that the overmoistening of the subgrade leads to a decrease in its strength characteristics. Therefore, one should expect a decrease in carrying capacity and loss of stability under the action of temporary loads from vehicles.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Papers [4,[18][19][20][21][22] examine the processes of the subsidence of the ballast of the railroad track under the action of static and dynamic loads without taking into consideration the technical condition of the subgrade. In addition, none of these papers resolved the issue of increasing the carrying capacity of a heterogeneous subgrade, which is of great importance in the operation of the railroad track.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Such destruction is inherent in the transport infrastructure around the world and is often the subject of discussion by civil engineers at scientific conferences, round tables, etc. [4]. a b Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains

Luchko¹,

Kovalchuk²,

Kravets³

et al. 2020

EEJET

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The technical condition of the railroad track subgrade has been analyzed, as well as the issues related to ensuring its strength and stability when exposed to floodwaters and when the track's sections are overmoistened during operation. As a result, it has been established that it is necessary to develop methods aimed at improving the subgrade's carrying capacity. The georadar research has explored the problematic areas of the railroad track subgrade, based on which the distribution of subgrade heterogeneity in the vertical plane, as well as the boundaries of its location, were established. Therefore, georadar research makes it possible to detect hidden defective sites in the subgrade without disrupting its strength characteristics. A technique has been proposed to improve the carrying capacity of the failed subgrade of a railroad track using the combined arrangement of drainage pipes in the vertical and horizontal directions in the railroad embankment. The special feature of this technique is the possibility to drain water at the different levels of surface water, which provides for an increase in the carrying capacity of the failed subgrade. The strained-deformed state of the subgrade reinforced with tubular drainage has been investigated. The result has proven the effectiveness of the use of tubular drainages to improve the carrying capacity of the railroad track overmoistened subgrade exposed to constant and temporary loads. This study findings have established that the deformity of the subgrade increases when using tubular drainage, though this occurs only in the initial period of its arrangement, in further operation, when it removes water from the subgrade body, the carrying capacity of the subgrade, on the contrary, will improve due to the enhanced physical and mechanical properties of soils

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 1 more Smart Citation

Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains

Luchko¹,

Kovalchuk²,

Kravets³

et al. 2020

EEJET

Self Cite

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“…In long-term operation, frozen soil highways often suffer from subsidence, cracking, and other diseases [15][16][17][18]. The existing studies mainly analyze the temperature field of each level of highway, failing to fully consider the water migration of the roadbed [19][20][21][22][23]. Komaravolu et al [24] created an accurate roadbed section model based on COMSOL, discussed the influence of width, slope, and height on roadbed temperature distribution under separate and integrated layouts, and concluded that the main influencing factors are slope and width under the two layouts.…”

Section: Introductionmentioning

confidence: 99%

Temperature Field Distribution and Thermal Stability of Roadbed in Permafrost Regions

Yao¹,

Shi²,

Zu³

2021

IJHT

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Many highways and railways in western China are built on permafrost roadbed. Frost heave and thaw settlement might cause diseases to frozen soil roadbed, such as deformation and cracking. For long-term operation, frozen soil roadbed should be kept stable and durable. Therefore, this paper analyzes the distribution law of temperature field of roadbed in permafrost regions, under the effect of thermal stability. Based on the thermodynamic properties of permafrost, the authors analyzed the influence of engineering geological factors, roadbed structural factors, and natural environmental factors on the thermal stability of frozen soil roadbed. Next, the antifreeze mechanism of frozen soil roadbed was described, together with the calculation methods for the relevant parameters. Afterwards, the temperature field of the roadbed with low thermal conductivity insulation material was analyzed by two methods, namely, steady-state thermal analysis and transient thermal analysis, and the solving process of roadbed temperature field was explained in details. The proposed analysis method and solving algorithm were proved valid through experiments. The research results provide a reference for the reasonable design of frozen soil roadbed.

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“…Many scholars have successfully investigated the relationship between highway subgrade and pavement diseases and traffic load through theoretical analysis, modeling simulation, and experimental verification [12][13][14][15]. Based on double-layer foundation model, Neupane et al [16] examined the deformation features of expressway subgrade under asymmetric traffic load following the idea of mobile constant load, and discussed the influence of traffic load amplitude and load movement speed on subgrade deformation in the case of saturated soil.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation Model of Subgrade Stability Based on Artificial Neural Network

Yao¹,

Shi²,

Zu³

2020

IJSSE

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In special areas, the highways may suffer from such diseases as deformation, cracking, subsidence, and potholes, making highway maintenance a complex and difficult task. To obtain the law-term deformation law of the subgrade and accurately evaluate the subgrade and pavement stability, this paper establishes a subgrade stability evaluation model based on artificial neural network (ANN). Firstly, the law of unstable subgrade deformation in highways of special areas was derived by analyzing the influencing factors on subgrade stability, namely, temperature field, moisture field, and traffic load. Next, the correlations between input and output characteristic quantities were extracted, and used to construct the nonredundant mapping function between influencing factors of subgrade unstable deformation and the levels of subgrade stability. Finally, a fuzzy neural network (FNN) was constructed based on Takagi-Sugeno model, realizing the evaluation of subgrade stability. The proposed model was proved effective and accurate through experiments.

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Stability of the Railway Subgrade under Condition of Its Elements Damage and Severe Environment

Cited by 4 publications

References 9 publications

Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains

Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains

Temperature Field Distribution and Thermal Stability of Roadbed in Permafrost Regions

An Evaluation Model of Subgrade Stability Based on Artificial Neural Network

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Stability of the Railway Subgrade under Condition of Its Elements Damage and Severe Environment

Cited by 4 publications

References 9 publications

Determining patterns in the stressed­deformed state of the railroad track subgrade reinforced with tubular drains

Determining patterns in the stressed­deformed state of the railroad track subgrade reinforced with tubular drains

Temperature Field Distribution and Thermal Stability of Roadbed in Permafrost Regions

An Evaluation Model of Subgrade Stability Based on Artificial Neural Network

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Product

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Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains

Determining patterns in the stresseddeformed state of the railroad track subgrade reinforced with tubular drains