METHOD TO STRENGTHEN LOOSE NATURAL BASE FOR ERECTION OF ROAD EARTH BED Russian patent published in 2012 - IPC E01C3/04 

FIELD: construction, road engineering.

SUBSTANCE: invention relates to construction of earth works erected on loose natural bases, including a road earth bed, preferably for a railway or a motor road. The method to strengthen a loose natural base to erect a road earth bed on collapsing soils of high capacity includes arrangement of a reinforcement device in a loose base soil in the form of ground piles, every of which represents a protective shell filled with a draining material, and subsequent surface vibratory compaction in a controlled mode with filling of sand or sand and gravel mixture between piles into a pile-to-pile space reinforced with a textile fabric, besides, control of the vibratory compaction mode by variation of vibration load parameters is carried out depending on condition of deformation and strength characteristics of a compacted soil determined as a result of systematic calculation of a soil safety coefficient, and monitoring stresses in the pile-to-pile space from vertical loads that occur in process of vibratory compaction and horizontal load that occur as soil piles expand in a protective shell. To speed up consolidation of the base soil and reduce time of soil subsidence in process of surface vibratory compaction of the pile-to-pile space, the vibration load parameters are varied until the soil safety coefficient reaches the maximum possible value of load against the base, and are maintained at a level permissible by the safety coefficient value.

EFFECT: higher reliability of earth bed base due to its strengthening (reinforcement) in the controlled mode.

3 cl, 1 dwg