Wyniki wyszukiwania - BazTech

1

Implementation of GPR and TLS data for the assessment of the bridge slab geometry and reinforcement

Cafiso S., Di Graziano A., Goulias D., Mangiameli M., Mussumeci G.

Archives of Civil Engineering

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2020

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Vol. 66, nr 1

297--308

EN

This paper presents a suggested approach for forensic investigation of bridge decks in which Ground penetrating radar (GPR) consisting of two antennas is used to assess the current conditions. The methodology was tested on a bridge deck in central Sicily. The acquired data were analyzed for identifying the asphalt overlay thickness, concrete cover depth and deck thickness and location of the rebar reinforcement. In the proposed approach for assessing bridge deck conditions the GPR survey was complemented with (i) a site investigation on layer thicknesses for calibration/verification purposes of the GPR response and (ii) a Terrestrial Laser Scanning system (TLS) to verify the bridge design slab curvature. The study shows that this methodology has significant merits on accurately assessing such bridge deck components when bridge design records are non-existing, and by using non-invasive methods such as laser scanning and GPR. The great advantage provided by the TLS technique is the possibility to obtain a 3D output model of the scanned element with the accuracy of the best topographic instruments in order to complement GPR data surveys for bridge inspection.

2

Surrogate measure of safety from road inspection data - experimental test on Polish roads

Cafiso S., D'agostino C., Kieć M., Pappalardo G.

Roads and Bridges - Drogi i Mosty

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2017

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Vol. 16, no. 2

115--130

EN

The European Directive 2008/96/CE on Road Infrastructures Safety Management gives great emphasis to road Safety Inspections SI as tool for safety management of existing roads. In this framework, development of surrogate measures of safety derived from data collected during safety inspections can provide a source of information for risk assessment. Furthermore, SIs derived information seems to be promising for road Agencies as a tool to prioritize measures and sections to treat. As a result of a research project funded by the European Union in 2004 and successful application in Italy, a Risk Index RI was developed and available as surrogate measure of safety for local two-lane rural roads. The procedure was adapted to the new Polish guideline for safety inspection and re-calibrated on the local crash type distribution. Experimental application on about 100 km of Polish two lane rural road shows a promising correlation between the RI and the crash frequency.

PL

Dyrektywa Europejska 2008/96/WE w sprawie zarządzania bezpieczeństwem infrastruktury drogowej kładzie duży nacisk na kontrolę stanu bezpieczeństwa ruchu drogowego SI jako narzędzia do zarządzania bezpieczeństwem istniejącej infrastruktury drogowej. W tym kontekście rozwój pośrednich miar bezpieczeństwa ruchu na podstawie danych gromadzonych podczas kontroli bezpieczeństwa może stanowić źródło informacji do oceny ryzyka w ruchu drogowym. Wyniki kontroli bezpieczeństwa mogą również stanowić źródło informacji dla administracji drogowej do optymalizacji wyboru stosowanych środków poprawy bezpieczeństwa ruchu drogowego, a także wskazywania odcinków wymagających interwencji. W tym celu wprowadzony został wskaźnik ryzyka RI, jako pośrednia miara bezpieczeństwa ruchu drogowego dla lokalnych dróg zamiejskich jednojezdniowych dwupasowych, który został opracowany we Włoszech w wyniku projektu badawczego finansowanego przez Unię Europejską w 2004 r. Stworzona metoda została dostosowana do nowych polskich wytycznych dotyczących kontroli bezpieczeństwa, a następnie skalibrowana z uwzględnieniem danych o wypadkach na drogach wojewódzkich, województwa małopolskiego w Polsce. Opisane w artykule badania przeprowadzone na odcinku około 100 km jednojezdniowych dwupasowych dróg zamiejskich w Polsce wskazują na występowanie zależności pomiędzy wskaźnikiem ryzyka RI, a częstością wypadków.

3

Application of safety inspections for evaluation of two-lane regional roads in Poland

Cafiso S., Kieć M., Milazzo M., Pappalardo G., Trovato F.

Archives of Civil Engineering

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2014

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Vol. 60, nr 4

453--473

EN

In the paper methods for conducting Road Safety Inspections (SIs) in Italy and Poland are described and compared. The goal of the study is to improve the quality and efficiency of the safety inspections of road network by using low cost equipment (GPS, Tablet, Camera) and specific software. Particular attention was paid to the need for proper calibration of factors, causing traffic safety hazard associated with road infrastructure. The model developed according to the Italian procedures was adapted to comply with the checklists and evaluation criteria of the Polish guidelines. Overall, a good agreement between the two approaches was identified, however some modification was required to include new safety issues, characteristic for the Polish network for safety inspection of two lane rural roads. To test the applicability about 100 km of regional two lane roads in Poland were inspected with Polish and Italian procedures.