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Classification of Micropile Underpinning Methods
Jouko Lehtonen Turku University of Applied Sciences, Turku, Finland Ville-Veikko Hyyppä Turku University of Applied Sciences, Turku, Finland
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ABSTRACT |
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Classification of Micropile Underpinning Methods
Jouko Lehtonen Turku University of Applied Sciences, Turku, Finland Ville-Veikko Hyyppä Turku University of Applied Sciences, Turku, Finland
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ABSTRACT |
The most common among the many reasons for foundation underpinning are seismic retrofit and prevention of harmful settlement. Micropiles are typically used for underpinning, whereby a separate load transfer structure is often provided between the micropiles and the existing superstructure. The present article introduces a classification of the various kinds of load transfer structures. In addition, the article proposes a new way of modeling underpinning using an adapted UML (Unified Modeling LanguageTM) sequence diagram. The adaptation of UML modeling allows the linking of the installation process and its various stages with the structural descriptions of, e.g., structural members and force diagrams. The classification can be used to support planning decisions, or to estimate costs or duration from the owner´s point of view.
Keywords: underpinning, micropile, jet grouting, load transfer structure, seismic retrofit, UML modeling
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