METHOD FOR CONSTRUCTION OF RETAINING WALL Russian patent published in 2001 - IPC

FIELD: construction engineering. SUBSTANCE: method used for building road interchanges under difficult engineering-and-geological conditions or within megapolis involves forming of reinforced ground structure made of layers of compacted drain soil of backing, arrangement of front fence made of masonry units on foundation and arrangement of roadway made of reinforced concrete slabs. Novelty is that concrete projection is mounted on foundation of front fence to prevent shifting of the latter; after that reinforced ground structure is made in the form of alternate layers of compacted drain soil and geotextile streaks. Laying of front fence is made on inner side of concrete projection in the form of masonry-unit facing with double reinforcement clearance provided between ends of reinforced ground structure and facing; in case facing height increases by not more than 1-2 units clearance is filled with concrete in layer-by-layer manner to form reinforced concrete wall; clearance is provided between top end of monolithic face wall and reinforced concrete slabs of roadway; height of mentioned clearance is about 10-15 cm. Monolithic face wall is tilted through angle 1^o÷(45-Φ/2)^o, to vertical line, where Φ is angle of internal friction of drain ground of backing. Layers of backing drain ground of reinforced ground structure are laid stepwise on side opposite to front fence; step length is reducing from bottom to top. EFFECT: reduced cost and time of construction; improved operating reliability and stiffness of wall throughout entire service life. 3 cl, 4 dwg