Inzenyrskogeologicka charakteristika prekvarternich hornin na listu 13-322 Kolin

Area of the map sheet is situated on the N margin of the Kutná Hora plain which tilts into the Nymburk basin. The bedrocks comprises rocks of the Kutná Hora crystalline complex (migmatites, orthogneisses, paragneisses, mica schists, amphibolites) at place overlain by relicts of Cretaceous sediments (sandstones, calcareous sandstones transitional into limestones, marls). On the left Labe river bank most of the bedrock is covered, however, by loess varying in thickness from 1 to 18 m (at Grunta max. 27.70 m). Terrace deposits are also largely covered by loess. The foundations of buildings that put higher strain on foundation soils are to be sited beneath the loess deposits preferably on the crystalline rocks(Rdt = 4-5 MPa) or on their weathering products (Rdt = 175-275 kPa) or possibly on terrace deposits, if present for sand Rdt = 175-500 kPa, for gravels Rdt = 200-800 kPa). The 3-13 m thick, predominantly sandy and dry deposits of mid-Pleistocene terraces covering erosional outliers north of Tři Dvory, Konárovice and Veletov are good foundation soils on the right Labe river bank. The greatest obstacle to the foundation of buildings is the shallow ground-water level in the youngest terrace deposits of the wide alluvial plain of the Labe river. This artlicle provides information on geotechnical properties of pre-Quaternary rocks.