After leveling the ground, the groundbeam is paved, and then the ground board is installed on the groundbeam according to the sequence of driver and slaver.
地面清理平整后，铺设地梁，然后按照公母次序在地梁上安装好地面板。
3
We consider each sleeper as an abutment of opposite forces, rails on horizontal sleepers as a mock dispersed elastic groundbeam model and trains as moving load on beams.