Alternative Title
Paper No. 10.09
Location
St. Louis, Missouri
Date
12 Mar 1998, 1:00 pm - 2:30 pm
Abstract
The construction of a new aerobic water treatment system for polluted water in the ENJCHEM chemical plant at Mantova (N. Italy), emphasized a particular foundation problem; the complete treatment system, covering a surface area of 12000 m2, lies on a zone once used as a waste fill, 4-6 m deep and composed of various materials from industrial processing, with highly variable origins and poor resistance characteristics. The main structures are: steel tanks with fixed roofs, and gauge and settling tanks, of 30 and 26 m diameter respectively, each containing a 15-m water head, reinforced concrete sediment thickeners and degassing basins with diameters of 15 and 35 m, each containing a 3-4 m restricted water head. The requirement to avoid contact between waste materials and the natural soil beneath excluded the possibility of deep foundations on piles. Shallow foundations were therefore necessary; 4-8 m preloading embankments were designed in relation to the characteristics of the fill and the subsoil, working loads, and the need to limit settlements and distortions. The design criteria of preloading, measurements of embankment settlements (400-700 mm) and main structures during hydraulic testing are reported and discussed.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Colleselli, F. and Macoratti, M., "A Particular Foundation Problem on a Waste Fill" (1998). International Conference on Case Histories in Geotechnical Engineering. 7.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session10/7
A Particular Foundation Problem on a Waste Fill
St. Louis, Missouri
The construction of a new aerobic water treatment system for polluted water in the ENJCHEM chemical plant at Mantova (N. Italy), emphasized a particular foundation problem; the complete treatment system, covering a surface area of 12000 m2, lies on a zone once used as a waste fill, 4-6 m deep and composed of various materials from industrial processing, with highly variable origins and poor resistance characteristics. The main structures are: steel tanks with fixed roofs, and gauge and settling tanks, of 30 and 26 m diameter respectively, each containing a 15-m water head, reinforced concrete sediment thickeners and degassing basins with diameters of 15 and 35 m, each containing a 3-4 m restricted water head. The requirement to avoid contact between waste materials and the natural soil beneath excluded the possibility of deep foundations on piles. Shallow foundations were therefore necessary; 4-8 m preloading embankments were designed in relation to the characteristics of the fill and the subsoil, working loads, and the need to limit settlements and distortions. The design criteria of preloading, measurements of embankment settlements (400-700 mm) and main structures during hydraulic testing are reported and discussed.
