METHOD FOR PHASED COMPLEX ENGINEERING PROTECTION OF GENERAL PLANNING EMBANKMENT Russian patent published in 2010 - IPC E02B11/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of hydrotechnical and land reclamation construction and is intended to provide for stability of soils in general planning embankments of developed lands. Method includes development of general planning embankment on site of developed territory and performance of protective measures in two stage, the first of which - in initial period of construction to provide for embankment fitness for performance of construction works in normal mode, and the second one - in final period of construction to provide for stability of embankment soils in process of its whole service life. At the first stage embankment is filled in several stages. At the first stage pioneer bed of embankment is formed, which is filled in layers in winter period of time during the first year of construction onto surface of formed layer of seasonal frost penetration cleaned from snow by layers having thickness that provides for the possibility of their additional compaction. If general planning embankment is erected from water-saturated soils, filling of embankment on the site of developed territory is carried out in separate sections of rectangular shape in plan. Separate sections of embankment are erected without their mutual merging, thus creating channels between separate sections of embankment for waters drain in warm period of the year. Neighbouring separate sections of embankment are joined by embankment passages arranged across mentioned channels to provide for free change-over of construction equipment from one section of embankment to another one. Culverts are arranged in embankment passages. At the second stage - in subsequent summer period of time in the second year of construction, after pioneer bed of embankment has melted down to the depth that equals 70-80% of its thickness, its additional compaction is started, besides additional compaction of embankment pioneer bed is completed to the moment of melting for the whole thickness and prior to beginning of melting in soils of natural origin that are arranged under pioneer bed. Another layer of embankment, second in height, is filled with layer compaction and filling of channels for water drain. Thickness of embankment layer second in height is arranged as not exceeding difference between value of rated depth of filled soils melting in this climatic region and value of thickness of embankment pioneer bed. If value of overall height of general planning embankment exceeds value of rated depth of seasonal melting for filling soils used for its erection, at another stage - another bed of embankment, next in height, with thickness of not more than rated depth of melting for filling soils is filled in winter period of time onto surface of embankment, preceding in height, cleaned from snow, after its complete frost penetration. Filled bed of embankment is also additionally compacted in summer period of time after its melting to the depth equal to 70-80% of its thickness. Further subsequent stages are repeated until general planning embankment is not brought till design height. At the second stage for protection of general planning embankment for the whole of its service life against water saturation with thawed and rain waters, and also with waters that arrive from adjacent territory, at the last stages of general planning embankment filling, measures are taken for organisation of long-term water-removal system and anti-filtration devices.

EFFECT: invention provides for stable condition of soils in general planning embankment at all stages of its existence.

9 cl, 3 dwg