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

Abstract

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%.

Experimental analysis of ballast bed state in newly constructed railways after tamping and stabilizing operation

“…Thus, it is still necessary to investigate whether numerical studies' findings can explain macroscopic phenomena. Furthermore, Zakeri [28][29][30], Esmaeili [31] and Jing [32] analyzed the lateral resistance of different types of sleepers, proposed the enhancement method of the lateral resistance of the ballast bed, and explored the sensitivity of the parameters affecting the lateral resistance, including the thickness and width of the ballast shoulder, the friction coefficient between the ballast bed and the sleeper. These studies show that the ballast bed resistance plays an important role in evaluating the state of the railway lines, so it is necessary to focus on the evolution of ballast bed resistance when analyzing the influence of three-sleeper tamping and stabilizing operation on ballast bed state.…”

Effect of Random Lateral Ballast Resistance on Force-Deformation Characteristics of CWR with a Small-Radius Curve

“…Other influencing factors include track curvature, initial misalignment, and longitudinal and torsional stiffness. To measure the lateral ballast resistance, Single Tie Push Test (STPT) and Lateral Track Panel Loading Test (LTPT) [ 20 , 21 ] are generally adopted, and various factors are found to affect lateral ballast resistance, including ballast consolidation [ 22 ], sleeper type [ 23 , 24 , 25 ], maintenance practice [ 19 , 26 ], etc. These factors mentioned may exhibit variations along the track and lead to the variability of the lateral ballast resistance [ 27 , 28 , 29 , 30 ].…”

Developing a Novel Superstructure System for the Ballasted Railways Using RRP235special Stabilized Clayey Soil

“…Y-shape steel sleeper in ballasted track has been investigated based on experimental methods using STPT and lateral track panel test (LTPT). The longitudinal resistance force (LRF) in STPT and LTPT [20]. The lateral resistance of HA110, winged and middle-winged sleeper achieved from STPT test, compared to the conventional B70, increased [21].…”