Abstract: The safe construction of shallowcovered tunnel in the uneven dynamic load of soil and rock area, is a big problem. The dynamic load and grouting methods are simulated by means of finite element numerical simulation. The ground surface settlement under different construction conditions are studied and the key factors of safe construction is determined. The settlement of the railway is effectively controlled by adopting key construction methods and technologies. In the end, the safe construction of underneath crossing is guaranteed.

Key words: rock and soil, composite, existing line, D-beam, safety prediction