METHOD OF ROADBED CONSTRUCTION Russian patent published in 1996 - IPC

FIELD: road building in regions with below-zero average annual temperature, mainly in northern regions. SUBSTANCE: method comes to clearing road lane from wood, bushes and moss-and-plant cover, making side water ditches, natural thawing and drying base ground, filling soil on base and strengthening the layer subsequently compacting it. For strengthening roadbed cut off bushes are used which are uniformly distributed over soil surface lengthwise the roadbed. Then layer is impregnated with used engine oil and sand and gravel mixture is applied to form levelling layer, 5-7 cm thick, subsequently compacting the layer. EFFECT: reduced cost of road building. 3 cl