“…Average cracking step in analogy with the width of prism the active collapsing soil is determined based on the data [20] by one of the following expressions a c =h c.lim ·η a ·ξ rg , (9) ψ m ·h c.lim at ℎ < h c.lim (10) Where: h ୡ.୪୧୫ −maximum depth of crack propagation, η ୟ -coefficient which takes into account the widely observed random factor (scatter) in the formation of cracks, expressed in a significant natural irregularities of the distance between them (approximately 1 ... 2), ξ ୰ -function unloading solid ground in the event of a crack in it, taken as a ξ rg =tgβ a (11) Where: β ୟ -active caving angle of soil, ψ ୫ -coefficient which reflecting layer monolithic taken equal to 1, 2 ... at the transition from unconsolidated soil to little connected dense soils, given that individual rocks to approximate an average of the cubic form, h ୪ -thickness of the layer of soil (for example dams or soil impervious element) [21][22][23][24].…”