METHOD FOR CONSTRUCTION OF BASE OF AERODROME AND ROAD PAVEMENTS FROM SUBSTANDARD SOILS Russian patent published in 2022 - IPC E01C3/04 

FIELD: agriculture.

SUBSTANCE: invention relates to construction of bases of rigid and non-rigid aerodrome and road surfaces in conditions of absence of crushed stone and gravel materials, coarse-grained sands or other standard nonfrost-heaving soil materials, suitable for creation of heat-insulating embankment, non-deformable during freezing and thawing. Method of construction of base of aerodrome and road pavements from substandard soils includes laying of soil layer, introduction of binder into it and their mixing with road mills, soil compaction, which is then subjected to fragmentation. Formation of the base is carried out in layers until the design thickness is achieved. Surface layer of soil is treated with bitumen emulsion. Following particular cases of the construction method are presented. Compaction of soil is carried out with rollers on pneumatic wheels, and soil fragmentation — with a lattice roller. Compaction of the lower layer is additionally carried out with cam rollers with ballast, after which, without temporary interruption, repeated compaction is carried out with rollers on pneumatic wheels until reaching 30–40 % of strength. Or soil compaction is carried out with rollers on pneumatic wheels weighing 25±4 t with pressure of 0.4 MPa. It is possible to carry out soil fragmentation with a lattice roller weighing 30±4 t with cell size making range of 3÷5 cm, or soil fragmentation is carried out without temporary interruption, after compaction with rollers until the layer of design strength is achieved. As binder, it is possible to use cement and/or polycement binders. Surface layer is compacted with two-slope or single-slope incline. In certain cases, the method may additionally include a preliminary excavation installation to the design depth, wherein the excavated soil, with the exception of the vegetal layer, is used for the base arrangement. In certain cases, the method may comprise preliminary filling of the lower layers on the natural soil base with a thickness corresponding to the design marks of the sole of the artificial base, and subsequent laying of the primary layer of soil to be reinforced.

EFFECT: increasing bearing capacity, crack resistance, frost heaving resistance and service life of artificial aerodrome or road surface.

11 cl