Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

The 75 (m) high stacks of the sulfur recovery units of Khangiran Gas Refinery in Iran exhibited significant levels of vibration in winds. Field observations reported that vibration occurred in the stacks 9 times during reel years. The longest vibration duration is 8 hours and maximum tip deflection is 1 (m). In most intensive vibration occurrence much amount of water exits from around of foundation and some crack is created in the structure. Stack diameter is 4.57 (m) at the bottom and 3.43 (m) at the top and its total weight is 182.3 (Ton). The octagonal foundation diameter is 14 (m) at the beneath part and 6 (m) at the upper part. The thickness foundation is 0.9 (m) in beneath part and 2 (m) in upper part. Foundation base soil is layered compacted and due to special geotechnical condition, it is saturated during the years. The paper aim is review of applied geotechnical solutions such as improvement of the soil characteristics by eliminating saturation condition and foundation hardness improvement and changing natural frequency of foundation and stack by changing the mass of them. Also, the other popular solutions are discussed in the paper and finally, effectiveness of applied method is studied.

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

An Investigation on the Stack Vibrations and Geotechnical Rehabilitation Solutions Case-Study: Khangiran Gas Refinery

Chicago, Illinois

The 75 (m) high stacks of the sulfur recovery units of Khangiran Gas Refinery in Iran exhibited significant levels of vibration in winds. Field observations reported that vibration occurred in the stacks 9 times during reel years. The longest vibration duration is 8 hours and maximum tip deflection is 1 (m). In most intensive vibration occurrence much amount of water exits from around of foundation and some crack is created in the structure. Stack diameter is 4.57 (m) at the bottom and 3.43 (m) at the top and its total weight is 182.3 (Ton). The octagonal foundation diameter is 14 (m) at the beneath part and 6 (m) at the upper part. The thickness foundation is 0.9 (m) in beneath part and 2 (m) in upper part. Foundation base soil is layered compacted and due to special geotechnical condition, it is saturated during the years. The paper aim is review of applied geotechnical solutions such as improvement of the soil characteristics by eliminating saturation condition and foundation hardness improvement and changing natural frequency of foundation and stack by changing the mass of them. Also, the other popular solutions are discussed in the paper and finally, effectiveness of applied method is studied.