Vplivi vzgona na objekte : študija primera nadzorovanega spuščanja dvignjene podzemne garaže
Buoyancy effects on structures : a case study on the controlled lowering of a raised underground garage

slovenian

2026

volume 75, issue 1

anti-floating stability   buoyancy   controlled lowering   underground garage   uplift

Zveza društev gradbenih inženirjev in tehnikov Slovenije
(Obvezni izvod spletne publikacije)

In recent decades, both above-ground and underground storeys of buildings have increased substantially at high-value urban locations. With urban development, extensive underground utility infrastructure, subway tunnels, etc., are also being constructed. High or fluctuating groundwater levels can generate uplift forces on enclosed underground structures, yet engineers often overlook this excessive buoyancy hazard when precautions are insufficient. Structures damaged by buoyancy require a thorough investigation to assess rehabilitation feasibility or to determine whether removal is necessary due to technical or economic constraints. This article presents a methodology for evaluating buoyancy-affected structures and developing rehabilitation solutions, illustrated through a case study. An inadequate design and execution of a single detail of an underground garage caused its sudden uplift. Based on site examination, review of design documentation, and uplift stability verification, a controlled lowering and rehabilitation procedure was successfully developed and implemented

05.10.2026