Gyula Bögöly

Budapest University of Technology and Economics · Department of Engineering Geology and Geotechnics

The aggregates are essential materials in civil engineering, they are used for railway and road constructions, for hydraulic engineering but they are also the base material of concrete. The crushed stones are exposed to several effects during their lifespan. Therefore, several tests were developed to evaluate their performance. One of the most impo...

Hazánk túlnyomó részét laza törmelékes üledékek, azaz valamilyen talajok borítják. Ezért a sziklarézsűk építése vagy a természetes sziklafalak ellenőrzése nem hétköznapi probléma, Magyarországon különleges feladatnak számít. Az állékonyság és a stabilitás számítása különösen fontos, hiszen az út- és vasútépítések melletti bevágások, nagymélységű mu...

Nowadays, there are several existing masonry arch structures which are usually protected. Therefore, the maintenance and determination of their load-bearing capacity is a very important issue. Consequently, it is necessary to understand the behaviour of these structures, but the investigation of an old structure can cause difficulties. Nevertheless...

A 3D surface model of an active limestone quarry and a vegetation-covered plateau was created using unmanned aerial vehicle (UAV) technique in combination with terrestrial laser scanning (TLS). The aim of the research was to identify major fault zones that dissect the inaccessible quarry faces and to prepare a model that shows the location of these...

The Geological Strength Index (GSI) is one of the most important input parameter for rock engineering design in case of rock masses. Recently, several quantitative determinations of this value have been developed. These methods can be used for both rock cores and tunnel faces, as well. The paper presents different methods for calculating the GSI va...

The Geological Strength Index (GSI) is one of the most important input parameter for rock engineering design in case of rock masses. Recently, several quantitative determinations of this value have been developed. These methods can be used for both rock cores and tunnel faces, as well. The paper presents different methods for calculating the GSI va...

Steep, hardly accessible cliffs of rhyolite tuff in NE Hungary are prone to rockfalls, endangering visitors of a castle. Remote sensing techniques were employed to obtain data on terrain morphology and to provide slope geometry for assessing the stability of these rock walls. A RPAS (Remotely Piloted Aircraft System) was used to collect images whic...

Low strength rhyolite tuff forms steep cliffs in NE Hungary. A multi-dimensional approach including field analysis and laboratory tests was conducted to understand the mechanical properties of the tuff and to measure discontinuity surfaces. With the help of RPAS (Remotely Piloted Aircraft System) and TLS (Terrestrial Laser Scanning), a digital terr...

Steep, and hardly accessible jointed rhyolite tuff cliff faces surround a Castle in NE-Hungary, at village of Sirok. The assessment of cliff stability required the recording of cliff geometry. Traditional surveying was not possible therefore cliff faces were 3D modelled by GNSS supported terrestrial laser scanner and UAV. The onsite engineering geo...

Siroki várhegyet alkotó riolittufa állékonysági vizsgálatát mutatja be a cikk, kiemelve a térinformatika és a mérnökgeológia együttes alkalmazását. A sziklalejtő felmérésére az erősen tagolt domborzat miatt és a nehéz megközelíthetőség miatt GNSS támogatású földi lézerszkennelés és drónos légifényképezést alkalmaztunk. Az így kapott térinformatikai...

Stone masonry arch bridges in North Hungary represent cultural heritage values. For the maintenance and preservation of these bridges detailed mapping of lithologies and weathering forms are required. The purpose of this paper is to present the identified lithotypes, their conditions (weathering grade) and their petrophysical properties by using in...

Maintenance and restoration is a common problem of historical stone structures. To control the stability and to verify the load-bearing capacity of these structures there are several modeling methods from the simple approximate calculations to the difficult numerical methods. Several Hungarian stone masonry arch bridges were investigated in the pas...

This paper presents the required preparatory investigations for the construction of a masonry vault model experiment under laboratory conditions. The analyzed factors included structural design, material, loading and geometry of the model. A numerical modelling was made by Phase2 finite element program to check the performance of the masonry vault...