METHOD FOR RESTORATION OF BARROW PITS FOR CONSTRUCTION OF STRUCTURES Russian patent published in 2010 - IPC E21C41/32 E02D17/08 

FIELD: mining.

SUBSTANCE: invention is related to mining and processing industry and may be used to restore disturbed lands in construction and power industries. Method consists in the fact that after pit exhaustion, space of barrow pit is partially filled in layers: first with debris, and then filled with overburdens till elevation of foundation pit bottom for foundation of future structure. Squeezing plant is mounted onto even and compacted layer of overburdens, which is used to reinforce boards along perimetre of pit intended for construction, at the depth of at least 1.8 metre by means of horizontal squeezing of reinforcement elements with formation of end sections beyond the borders of pit walls. Then along perimetre of pit bottom, under each of protruding end sections of reinforcement elements, drilled piles are arranged with reinforcing frame and high foundation grill intended for installation of column that connects drilled pile with end sections of reinforcement elements, besides reinforcement elements are laid on calculated distance from each other, afterwards mass of soil is extracted in pit walls between reinforcing elements and initially installed drilled piles, after extraction of calculated amount of soil and reinforcement of walls in produced space, further drilled piles are installed with columns and fixed, and further amount of soil is extracted, cycle is repeated until calculated volume of premise is available in pit walls, after final equipping of underground premise, foundation is erected on manmade base, and ground structure is constructed.

EFFECT: reduction of labour expenses and cost of restoration works.

2 cl, 2 dwg