线路上的钢筋混凝土轨枕在其工作的状态下,往往要出现横向裂纹。大多数的裂纹出现在轨枕的中部。这种裂纹的出现,是由于道床反力引起的负弯矩作用的结果。假如每半根轨枕支承面积所处的重心向钢轨轴向偏移一些,那么轨枕中部负弯矩的数值是可以减少的(如图1)。 Reinforced concrete sleepers on the line in their working state, often have horizontal cracks. Most cracks appear in the middle of sleepers. The appearance of this kind of crack is the result of the negative bending moment caused by the reaction force of ballast bed. If the center of gravity for each half of the sleeper support area is offset axially towards the rail, the value of the negative bending moment in the middle of the sleeper can be reduced (Figure 1).