The aim of this diploma thesis is to investigate the impact on the bottom section of railways with regard to increased maximum axle load and velocity of trains. In addition, the effects on railway operation are discussed. Initially, an overview is given regarding the tasks and the reason for choosing this topic. Due to the fact that earthwork might be the reason for recent problems such as bad track set and speed restriction sections, the 2nd chapter focuses on the earth work development in railroads. Chapter 3 points out the investigated types of bottom sections. The final calculation, described in detail in chapter 4, is based partly on literature search and on the calculation process itself. The settlement calculation for example, invented by Menard, is mostly used in France. In order to be able to state something about the elastic and plastic part of the settlement, Menard s settlement calculation was integrated in the final calculation because the ÖNORM B 4431 dont differentiate between these two parts. The elastic part, which occurs after every train run, is very low meaning that the increase of axle load and velocity of trains wont have a severe impact on the railway. Chapter 5 discusses all the accounts of the loads integrated in the final calculation. The explanation of the results and the discussion concerning the effects on railway operation and infrastructure are described in chapter 6. The outcome based on the research performed is, that except for some cases there is no immediate effect on infrastructure with respect to the settlement. Finally, the last chapter sums up the results and presents actions needed to cope with the effects.