The long-distance large-diameter water pipeline directly buried on the soft soil is sensitive to settlement due to its flexibility.The uneven settlement of the foundation leads to the change of the stress state of the pipeline

which is easy to cause leakage damage of the pipeline.In this paper

the finite element software PLAXIS 2D is used to simulate and analyze the settlement of the foundation of the directly buried circulating water pipeline in a seaside power plant under the additional load of 3 m high fill.According to the settlement amount

the directly buried pipeline is proposed.The two ends are blocked and the pipe is filled with water.After one year of consolidation settlement

the consolidation settlement of the pipeline is more than 90 %.When the residual settlement is small

the two ends of the pipeline are respectively connected to the main plant and the aeration tank

and the settlement process is monitored on site.The results show that the settlement monitoring value is close to the finite element calculation result

and the trend is consistent.After the project is put into operation for two years

the pipeline has not experienced leakage damage

which meets the expected requirements.The cost of foundation treatment is greatly reduced.