Abstract: In order to study the dismantling effect of high-speed train carriages, the carriage panels of a certain CRH380 model were taken as the research object. Seven dismantling methods were used to carry out dismantling and cutting experiments, and the efficiency and advantages and disadvantages of each method were compared and analyzed with cutting speed as the main indicator. The results show that the cutting efficiency of toothless saw (diamond saw blade), oxy-acetylene flame cutting, and hydraulic shear cutting high-speed railway carriage panels is extremely low, and the dismantling is ineffective; Plasma cutting and laser cutting can be used to break down carriage panels, but the instruments are bulky and not suitable for use on rescue sites; The grinding wheel toothless saw and the double wheel opposite direction saw can achieve effective cutting and dismantling, with an average cutting speed of about 3.38 mm/s and 5.68 mm/s, respectively. The average time for cutting an isosceles triangle with a side length of 60 cm is 532,317 s, respectively. During cutting, a large amount of heat is generated, and the saw blade is severely worn. For general high-speed train carriage dismantling and rescue scenarios, it is recommended to prioritize using grinding wheel toothless saws and double wheel opposite direction saws to cut the carriage.

Key words: high-speed trains, carriage board, demolition test, rescue channel