The principles of compiling and the content of the Geocryological Map in the area of the bridge crossing over the Lena River

Abstract

For the safe construction and operation of a bridge it is necessary to have a clear understanding of the landscape, geocryological and hydrogeological features of the territory. In this regard, a review of the geocryological study of the permafrost zone of the bridge crossing area has been prepared; the analysis of the published and archive literature on the geological structure and hydrogeological conditions of the area under study was carried out; field and fund data and data of engineering and geological surveys were studied and analyzed; control and linking field routes and geothermal measurements in wells were carried out. The results obtained in the course of this work served as the basis for the compilation of a permafrost landscape map and then a geocryological map of the bridge over the Lena river in the area of Yakutsk on a scale of 1 : 5 000. The geocryological map shows the spatial heterogeneity of the permafrost-landscape conditions of the territory under consideration due to zonal (altitudinal-belt), regional and local factors. The information base of geocryological characteristics was the data of engineering and geological surveys.