Research on Trench Slope Stability in Immersed Pipe Engineering Based on Fluid-Structure Interaction
In recent years,more and more paths,long-distance water pipelines go under river or sea.Based on Shaying River immersed pipe works of Fuyang water supply section in Water Transfer Project from the Yangtze River to Huaihe River,research is carried out for the stability of the immersed pipe trench slope impacted by water flow.Simulation test is conducted on the soil slope under open trench by using FLUENT-MPCCI-ABAQUS coupling method.The results show low pressure zone inside the trench,high pressure zone at the top of the trench in the dynamic water pressure field.The dynamic pressure acting on the top of the slope against water flow is always lower than that on the slope along water flow,and the influence of water flow on the stability of the former is greater than that on the stability of the latter.In addition,the empirical formula for the safety factor of trench slope is obtained on the basis of flow velocity and slope ratio by fitting fluid-structure interaction data.
immersed pipe engineeringunderwater slopefluid-structure interactionstability of slope
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