Mechanics of Track Structure with Y-Shaped Steel Sleepers in Sharp Curves

Czyczuła, Włodzimierz; Bogacz, R.

doi:10.4028/0-87849-468-5.71

Cited by 2 publications

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“…15 Reviewing the technical literature reveals various methods for increasing the lateral resistance in ballasted tracks such as using frictional sleepers, 27,28 use of vertical wings in wooden and concrete sleepers 29 , utilizing the Y-shaped sleepers and installation of lateral wings and frame sleeper. [30][31][32][33] As a special case, application of in situ polyurethane geo-composite beams known as Xia Track has been proposed to improve the passive shoulder resistance of a railway track. 34,35 On account of its high specific gravity and frictional specifications respect to the limestone ballast, the application of steel slag ballast in ballasted tracks increases the track lateral resistance.…”

Section: Introductionmentioning

confidence: 99%

Experimental comparison of the lateral resistance of tracks with steel slag ballast and limestone ballast materials

Esmaeili

Nouri

Yousefian

2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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Extending the use of continuous welded rails by eliminating the weak points (expansion joints) of a railway track especially in sharp curves, which has resulted in increasing the operational speed and axle load of rolling stocks, enhances the special attention to the issue of track lateral resistance. In this regard, the ballast layer interaction with sleepers plays a crucial role in providing the track lateral stability. In many railway projects supplying the appropriate ballast materials has encountered serious restrictions owing to the lack of qualified ore and also their long distance to the project's site. With the development of steel industry, the quantity of production and accumulation of steel slag as a waste material has increased. In recent years, a great deal of attention has been paid to the use of this material as railway ballast. According to the physical and mechanical characteristics of steel slags, such as high specific gravity and the granular roughness respect to the limestone ballast, the usage of slag ballast can improve the track lateral stability. In this research, many field experiments were conducted on tracks with steel slag ballast and limestone ballast materials considering the same gradation. In this matter, several single tie push tests were carried out on both tracks with various ballast geometries. The ballast depth was considered as 30, 40, and 50 cm and the shoulder ballast width was equal to 30 and 40 cm. Moreover, the shoulder ballast height was chosen 0 and 10 cm. Consequently, the lateral resistance of both tracks was measured and compared in the same conditions. In overall, the obtained results confirmed a 27% increase in lateral resistance of track with steel slag ballast respect to that with limestone ballast.

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Section: Introductionmentioning

confidence: 99%

Experimental comparison of the lateral resistance of tracks with steel slag ballast and limestone ballast materials

Esmaeili

Nouri

Yousefian

2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Y-shape steel sleeper specifications Y-shape steel sleepers were firstly introduced in German in 1984, and after that, these sleepers were used in Swiss and Poland. 17 These sleepers have been presented as a local practical approach to increase the railway track stability, especially for CWR tracks and curves with a radius lower than 400 m, where the presence of rail joints is indispensable. 15,17,24 On the other hand, Y-shape sleepers have some drawbacks.…”

Section: Methodsmentioning

confidence: 99%

“…17 These sleepers have been presented as a local practical approach to increase the railway track stability, especially for CWR tracks and curves with a radius lower than 400 m, where the presence of rail joints is indispensable. 15,17,24 On the other hand, Y-shape sleepers have some drawbacks. The manufacturing price of Y-shape sleepers is more than ordinary concrete sleepers.…”

Section: Methodsmentioning

confidence: 99%

“…15 Other studies also revealed that Y-shape sleepers raise the track lateral stability. [16][17][18][19][20] Based on reviewed studies, the lateral resistance force (LRF) of a track with Y-shape steel sleeper has not been measured yet; however, some researches clarified that this type of sleeper increases the track lateral stability. In this matter, this study focused on measuring the lateral resistance of Y-shape steel sleepers to cover the previous studies and response to the safety concerns of Y-shape steel sleepers.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation into the lateral resistance of Y-shape steel sleepers on ballasted tracks

Zakeri

Bahari

Yousefian

2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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Track lateral resistance ensures the track stability under operation and during its service life in lateral and longitudinal directions. Numerous methods and techniques have been considered to enhance track lateral resistance. Since sleeper, as one of the railway track superstructure components, has a significant contribution in providing the lateral resistance, using different types of sleepers, like Y-shape one, would alter the track lateral resistance. The utilization of Y-shape steel sleepers in railway tracks needs further investigation to comprehend the structural behavior. Hence, in this paper, the lateral resistance of the Y-shape steel sleeper was experimentally investigated by performing the lateral track panel loading test (LTPT) and single tie push test (STPT). The longitudinal resistance force (LRF) in STPT depends on the loading direction. The LRF was specified as 16 kN in Y-top direction and 13 kN in Y-bottom direction for a single sleeper. The LRF in STPT was enhanced by 90% on average compared to the conventional concrete sleeper. The LRF in LTPT was also obtained as 18 kN, and its increasing percentage was measured as 12.5%.

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Mechanics of Track Structure with Y-Shaped Steel Sleepers in Sharp Curves

Cited by 2 publications

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Experimental comparison of the lateral resistance of tracks with steel slag ballast and limestone ballast materials

Experimental comparison of the lateral resistance of tracks with steel slag ballast and limestone ballast materials

Experimental investigation into the lateral resistance of Y-shape steel sleepers on ballasted tracks

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