DBPapers
DOI: 10.5593/SGEM2015/B12/S2.110

UNDERGROUND SPACE OF SAINT-PETERSBURG AS A MULTICOMPONENT SYSTEM: ENGINEERING GEOLOGICAL AND GEOTECHNICAL ASPECTS OF ITS DEVELOPMENT

R. Dashko, Y. Karpova
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-32-2 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 2, 827-833 pp

ABSTRACT
The paper offers a complex approach to assess underground space as a multi-component system for its development and utilization. It is indicated that a geotechnical analysis of sandy and clayey soils of St. Petersburg needs to be carried out based on two models, i.e. one for a jointed and blocky environs and the other for fine-pored media. It has been established that chemical composition of the ground water in the city is characterized with a high content of alkaline-earth elements, which proves the intensive destruction of construction materials, as well as with presence of organic substances judging by the chemical oxygen demand (COD) and biological oxygen demand in 5 days (BOD5). For the first time ever, a microbiotic component has been distinguished which determines the following phenomena: 1) alteration of physical and mechanical properties of sandy and clayey soils; 2) development of flowing sand and thixotropic phenomena; 3) biocorrosion of various construction materials. It is stated that even consolidated morainic soils usually viewed as a safe foundation and media for structures of various applications are transformed into weak and easy-deformable materials characterized with low strength in conditions of intensive contamination.

Keywords: underground space, sandy and clayey soils, microbiota, biochemical gases, buried structures

PAPER 10.5593/SGEM2015/B12/S2.110 : UNDERGROUND SPACE OF SAINT-PETERSBURG AS A MULTICOMPONENT SYSTEM: ENGINEERING GEOLOGICAL AND GEOTECHNICAL ASPECTS OF ITS DEVELOPMENT

35 EURO ADD TO CART


Your cart ( items)

Subtotal:
Tax cost ():
Shipping cost:
Total:
Checkout Empty