Big Creek Flood Control Project, Cleveland, Ohio. Phase II. General Design Memorandum. Appendix A. Soils, Geology, and Construction Materials

摘要

The site of work along Big Creek lies within the Erie Plain of the Central Lowland Physiographic Province. The Erie Plain is characterized by somewhat rolling topography which slopes regionally to the northwest. In the vicinity of the project site, Big Creek has deeply dissected the regional topography, providing local relief of upwards to 125 feet. Along most of its exposed length, Big Creek flows over a shale bedrock surface. In places, small bedrock riffles and pools have formed. At other places, the bedrock is covered by a thin veneer of platy shale gravel. Outcrops of bedrock occur throughout the Big Creek Valley. Overburden within the project site is characterized by both natural, in-place soils and soils re-worked for use in structures such as railroad embankments, highways, and bridge formations. Whether re-worked or natural, the overburden is dominated by sandy, silty clay. In many instances, natural soils are distinguished from re-worked deposits only in degree of compaction and associated mechanical properties. It is clear that most of the re-working entailed use of local soils. However, in a few places, as described below, imported fill material with widely varying properties are locally dominant. (Author)