| RM-80 full section undercutting ballast claening machine is made by means of importing the technology from Plasser&Theuere Austria under the way of combining the technology with trade.The machine is of the most advanced level in the world , and played an important role in speeding-up of railway main line in recent years.On the railway line nuder normal major repair cycle , RM-80 full section undercutting ballast cleaning machine has enough excavation ability in working condition , productivity can come up with it's design standard . Nevertheless , in Chinese railway , there is a shortage of applying heavy duty maintenance machine to conduct the track major repaair for so long time , which resulted in track mudding and hardening . Furthermore , this situation will still exist for long time . Those mentioned above has already been proved either in and outside our country . Infact , when the machine works on the track which is mudding and hardening , especially on hardening line ,RM-80 can not give full play to it's productivity , and sometime the machine can not go forward with excavating chain turnning , which results in a low productivity of not more than 100 meters per hour . It is quite evident that the RM -80 is not suited to working on the harden ling .In order to make RM -80 be suited to the conditions in China , we conduct an analyse and a calculation theoretically on excavating obstruction , excavating productivity and traction ability sa well. so that we can choose a better matching of produvtivity to solve problem of insufficient ability of excavation .
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