Analysis of Settlement of Underground Pipeline Through Open-excavation in Soft Soil

It is strict to control the settlement of pipeline,especially in soft soil. In this paper,a special treatment to the foundation of pipelines is made. In order to study the feasibility of this technology, the pre-consolidation, slope excavation, pipe laying and backfill, are simulated by numerical method with emphasis on the dissipation of excess pore water pressure, the process of the settlement, including the settlement of the pipeline and the ground surface. The results show that the settlement of pipeline is 23cm, the ground surface settlement above the pipe is about 30cm by adopting the new technology of the pipeline processing in ideal conditions. It is safe in situation. Consequently, the treatment to the foundation of the pipeline is reasonable.