Site condition and fault movement are the main reasons of buried pipeline’s damage. It is the main problem of earthquake lifeline engineering to avoid the damage of buried pipelines affected by site condition and faults under earthquake load. By the parasolid modeling in ADINA

through the definition of site body and Boolean operation

the geometry model is established for the analysis of buried pipeline damage

and finite element modeling of soil-fault-pipe is worked out. With model preferences

parameters of the model are defined

such as the characteristics of rock and soil

characteristics of pipeline. Pipe-soil friction and fixity are applied

and loads of earthquake wave and fault displacement are defined. According to the calculating results

influence of some parameters on the damage of buried pipeline under earthquake load are investigated

such as buried depth

parameters of faults

and pipe-soil friction. The deeper of burying and the bigger of fault throw

the easier of pipe deformation and damage. Optimum volume of pipe-soil friction coefficient and cut angle between fault and pipeline are obtained. Finally

some advices are proposed for the protection of buried pipelines in engineering.