Study of contact forces in the bearing part of the protective coating of underground pipelines in gravel and cobbles

In the construction and operation of underground pipelines, feasibility engineering methods protecting insulation coating from external mechanical impacts should be based on existing loads. When an pipeline is laid coarse gravel very soil, analysis support forces at base a pressing issue. particular, difficult conditions for construction, reconstruction, repair pipelines include cases when route passes through sections rocky soils. Discrete large grain content in form gravel, cobbles, boulders. The article analyzes influence size foundation soil components magnitude force arising protective part depending unevenness its granulometric composition. One directions studying distribution contact-mechanical interaction granular soils discrete model. distinction medium model that individual elements structure are viewed as mechanically interacting bodies. Structural particles bulk material can considered spheres. results modeling contact problem using (granular) presented. It was found with same diameter depth burial, varies pipe chosen project (for 1420 mm, maximum difference 23%). case ground, supporting increase by 3-5 times. stability strength formulated taking into account discreteness particles.