Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

On the Tychy Brewery site a set of 6 tanks of the diameter varying from 5.4 m to 17 m was designed. The tanks are elements of Sewage Treatment Plant. Due to unfavourable soil conditions (plastic clay) the tanks were founded on 15 m long CFA piles with the diameter of 400 and 600 mm. In order to save construction costs piled raft foundation system was proposed. Based on the analysis and respective calculations it was assumed that raft foundations, founded of gravel fill under each tank, would bear up to 20 % to 30% of total load. The assumption allowed shortening of all piles about 3 m minimum. The loading test of 3 piles showed that approximately 80 % of total load is transferred by piles into the subsoil. In order to confirm the assumptions assumed and to measure real settlement of tanks, loading tests of all tanks were carried out by means of its gradual water filling. The comparison of the results of tank settlement measurements and respective calculations showed good agreement between calculated and measured values. The latter did not exceed permissible settlements assumed for this type of constructions and installations. In the paper soil conditions, calculations, solution of tanks foundation, field tests and results obtained are described.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

Investigations of Settlement of Piled Raft Foundation

New York, New York

On the Tychy Brewery site a set of 6 tanks of the diameter varying from 5.4 m to 17 m was designed. The tanks are elements of Sewage Treatment Plant. Due to unfavourable soil conditions (plastic clay) the tanks were founded on 15 m long CFA piles with the diameter of 400 and 600 mm. In order to save construction costs piled raft foundation system was proposed. Based on the analysis and respective calculations it was assumed that raft foundations, founded of gravel fill under each tank, would bear up to 20 % to 30% of total load. The assumption allowed shortening of all piles about 3 m minimum. The loading test of 3 piles showed that approximately 80 % of total load is transferred by piles into the subsoil. In order to confirm the assumptions assumed and to measure real settlement of tanks, loading tests of all tanks were carried out by means of its gradual water filling. The comparison of the results of tank settlement measurements and respective calculations showed good agreement between calculated and measured values. The latter did not exceed permissible settlements assumed for this type of constructions and installations. In the paper soil conditions, calculations, solution of tanks foundation, field tests and results obtained are described.