Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

A relatively rare phenomenon is discussed in the bellow report. Some deformations and subsidences of the road pavement and of some facilities of the plant for chemically contaminated water in Sofia Thermal Power Plant are examined here. A danger of demolishing of large ponds of sediment water, as well as of incidences with the high steel poles for high voltage were highly possible to happen if current situation is retained. Various studies with this topic have been conducted - geophysical, such as geo-radar, electro-tomographical and drilling ones (with short boreholes). Laboratory and field studies of the ground have been also executed together with a historical review of the construction and reconstruction; different aspects of topography and geological history of the area were also discussed. The site is located on the right bank of a small river, and the ground is swelling clay dust on layers of sand and silt. Under the site, there is a dense network of pipes, cables and ducts of various installations available, but a few have on hand accurate information about their disposition. The comparison of hypotheses and conclusions of the analysis show very interesting combination of a bunch of diverse factors’ influences, i.e. the geological structure, depression curve, chemical aggression of water, electrostatic catalysis and corrosion of steel pipelines, suffusion, etc. There are caverns and unsealed areas in the ground, formed by collapses of flooring and threatening the sustainability of some of the equipment. Measures have been taken to fill the voids and unsealed areas by injecting cementations grout, and also to prevent further development of these adverse processes. The ground under the foundations of endangered facilities was reinforced.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 4th, 12:00 AM

Caverns in the Ground Under Thermal Power Plant, Caused by Static Electricity and Chemically Aggressive Water

Chicago, Illinois

A relatively rare phenomenon is discussed in the bellow report. Some deformations and subsidences of the road pavement and of some facilities of the plant for chemically contaminated water in Sofia Thermal Power Plant are examined here. A danger of demolishing of large ponds of sediment water, as well as of incidences with the high steel poles for high voltage were highly possible to happen if current situation is retained. Various studies with this topic have been conducted - geophysical, such as geo-radar, electro-tomographical and drilling ones (with short boreholes). Laboratory and field studies of the ground have been also executed together with a historical review of the construction and reconstruction; different aspects of topography and geological history of the area were also discussed. The site is located on the right bank of a small river, and the ground is swelling clay dust on layers of sand and silt. Under the site, there is a dense network of pipes, cables and ducts of various installations available, but a few have on hand accurate information about their disposition. The comparison of hypotheses and conclusions of the analysis show very interesting combination of a bunch of diverse factors’ influences, i.e. the geological structure, depression curve, chemical aggression of water, electrostatic catalysis and corrosion of steel pipelines, suffusion, etc. There are caverns and unsealed areas in the ground, formed by collapses of flooring and threatening the sustainability of some of the equipment. Measures have been taken to fill the voids and unsealed areas by injecting cementations grout, and also to prevent further development of these adverse processes. The ground under the foundations of endangered facilities was reinforced.