Risk assessment method for collapsible loess based on simulation of pipeline multi-angle laying

The invention discloses a risk assessment method for collapsible loess based on simulation of pipeline multi-angle laying. The risk assessment method comprises the following basic steps: analog simulation: proportioning experimental materials and establishing different-angle models; simulating the working conditions of running water scouring to different-angle laying; analyzing damage conditionsof soil bodies around pipelines with different laying angles; determining the relationship between the angles and the soil body damage according to soil body cracks, displacement and the quantity of quicksand; establishing a relation curve routing plan between the laying angles of the pipelines and destruction loss of the soil bodies around the pipelines; numerical simulation: establishing a modelby using FLAC3D according to a slope constructing model during a laboratory test; establishing different-angle laying models and plastic state diagrams; establishing vertical displacement contour maps of different-angle soil s