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A platform for research: civil engineering, architecture and urbanism
Engineering-geological problems in research on flood deposits
Summary A detailed estimation of engineering-geological properties of building soils should comprise the problems arising from specific features of these soils, especially if they are the so-called weak soils. Besides, engineering-geological research tends to be improved and the criteria are defined to expect the general features of soils in certain geological environments, that is in definite areas. During the present investigations fluvial flood deposits, muds, were examined. They are considered as weak soils and their unfavourable properties result from numerous factors: slight diagenesis, high moisture and considerable lithological variability. Holocene and recent muds were examined, coming from the valleys of the Vistula and the Odra as well as of their tributaries. Engineering-geological properties of muds were found to depend on lithology reflecting the conditions in the valley and the drainage basin during deposition. The following parameters were found to be the most significant: grain size composition (clay fraction in all soil types and sand fraction in not very cohesive soils), conten of organic matter (over 1 per cent), moisture, and, from the parameters that describe the soil state, liquid limit to reflect the physico-chemical properties of muds and their activity to water. The results obtained and recorded relationships should be applied among others during the preparation of maps and in engineering-geological regionalization of river valleys.
Engineering-geological problems in research on flood deposits
Summary A detailed estimation of engineering-geological properties of building soils should comprise the problems arising from specific features of these soils, especially if they are the so-called weak soils. Besides, engineering-geological research tends to be improved and the criteria are defined to expect the general features of soils in certain geological environments, that is in definite areas. During the present investigations fluvial flood deposits, muds, were examined. They are considered as weak soils and their unfavourable properties result from numerous factors: slight diagenesis, high moisture and considerable lithological variability. Holocene and recent muds were examined, coming from the valleys of the Vistula and the Odra as well as of their tributaries. Engineering-geological properties of muds were found to depend on lithology reflecting the conditions in the valley and the drainage basin during deposition. The following parameters were found to be the most significant: grain size composition (clay fraction in all soil types and sand fraction in not very cohesive soils), conten of organic matter (over 1 per cent), moisture, and, from the parameters that describe the soil state, liquid limit to reflect the physico-chemical properties of muds and their activity to water. The results obtained and recorded relationships should be applied among others during the preparation of maps and in engineering-geological regionalization of river valleys.
Engineering-geological problems in research on flood deposits
Myślińska, E. (author)
1985
Article (Journal)
English
Engineering-geological problems in research on flood deposits
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