Resilient behavior of stabilized and conventional high speed's rail track subgrades under different drainage conditions and seat loads. GEOLAB HSRTSUB (Avrupa Birliği H2020 Araştırma ve İnovasyon Programı Horizon 2020). Ljubljana, Slovenia.

Railways are a type of transportation that have always been widely used for both freight and passenger transport due to their reliability, speed and economy. High-speed trains are a good alternative when it comes to reducing travel time. Increasing axle loads, operating speeds and extreme weather conditions have made it necessary to develop the railway superstructure and make it safer. Increasing train speeds and axle loads, extreme weather conditions, more durable railway foundation floors, reducing the need for maintenance and repair of the superstructure, improving drainage conditions, etc. It encourages scientists to research these topics more intensively. Speeds (critical speeds) above 217 km/h for freight trains and 270 km/h for passenger trains cause resonance phenomena that lead to greater deformations than static loads. Studies have shown that due to critical train speeds in infrastructure, strong vibrations can occur in the roadbed and fills, which can lead to critical deformations. Large deformations can occur when the train speed reaches the "critical speed". These movements can be dangerous to the integrity of the train and the pavement and increase road maintenance costs. Therefore, it is critical to design a railway superstructure that will provide a dynamic stiffness that limits the deformations of the superstructure to an acceptable level. Railways are considered as one of the critical infrastructures for the GEOLAB project. For this purpose, the settlement loads of the rails at different speeds will be calculated according to the equations accepted in the literature and the hollow cylinder test will be performed on the substructure specimens stabilized with the NovoCrete® system and on the railway substructure specimens stabilized with conventional methods at different water contents and different train passing speeds to determine the resilient deformation behavior in the base floors will be determined. The results of the project will set an example, especially for the search for alternative solutions for problematic railway subgrades.

01.02.2023 – 18.02.2023 CAHİT GÜRER, MURAT VERGİ TACİROĞLU

Tamamlandı H2020 Araştırmacı