The invention discloses a
simulation method for detecting the side direction stability of a directly paved
submarine pipeline and a
simulation device; the invention firstly prepares a soil sample to simulate a
seabed, mounts a test pipeline, releases the pipeline to lead the pipeline to generate initial
sedimentation under the action of self-gravity when the pipeline is just contacted with the
seabed and simultaneously adopts a
laser displacement sensor to measure the initial
sedimentation amount of the pipeline in a soil body, applies an incline pull to the pipeline through a stepping motor to simulate the actions of a horizontal daggling force and a vertical lifting force of a sea flow to the pipeline, and simultaneously measures the pull of the stepping motor, a horizontal displacement and an additive
sedimentation amount during the side direction destabilization process of the pipeline, a
displacement field of the soil body at the lower side during the side direction destabilization process of the pipeline, and a soil pressure of the side direction. The utilization of the
simulation method and the simulation device of the invention can effectively simulate a bearing soil body, the horizontal dragging force and the vertical lifting force of the single-direction sea flow to the pipeline, etc., of the directly paved
submarine pipeline and can monitor the stability parameters like the limit side direction
soil resistance of a pipeline foundation in real time, thus being capable of simulating the side stability of the directly paved
submarine pipeline.