Öszvérszerkezetű hidak építéstechnológiái a közlekedésbiztonság fényében
Authors: Gosztola Dániel 
Published: April 2023

Összefoglalás.

Számos meglévő infrastruktúra-beruházás esetén – legyen az felújítás,
rekonstrukció vagy fejlesztés – szükségessé válhat új hidak építése, ezek közül
kiemelt kérdéskör azon beruházások, ahol az áthidalandó keresztmetszet bővül és
a feszített vasbeton gerendás szerkezet helyett az öszvérszerkezetű híd
gazdaságilag indokolttá válik. A híd építéstechnológiája forgalombiztonsági és
forgalomszervezési oldalról kulcsfontosságú. Az építés ideje alatt a forgalmat
biztosítani kell, amit a hagyományos építési módnál forgalomterelés mellett
lehet megtenni. A kutatásom ezért a hídépítés miatt szükséges forgalomterelések
közúti biztonságával foglalkozik, illetve az új, a problémát feloldó hídépítési
technológiákkal.

Summary.

In the case of many existing infrastructure investments – be it renovation,
reconstruction or development – it may become necessary to build new bridges.
The investments where the cross-section is expanded and instead of the
prestressed reinforced concrete beam structure, the use of composite bridge
becomes more economically. The construction technology of the steel-concrete
composite bridge is crucial from the point of view of traffic safety and traffic
management. Traffic must be ensured during construction, which can be done with
traffic diversion in the case of the traditional construction method. My
research therefore deals with road safety, the traffic diversions required due
to steel-concrete composite bridge construction, and the new bridge construction
technologies that solve this problem. In the reconstruction of the M1 motorway,
the prefabricated prestressed reinforced concrete beam structure could be built
with intermediate support, but there are several arguments in favor of
abandoning the intermediate support and building steel-concrete composite bridge
with single span. The strongest of these is ensuring road safety. In addition to
the existing traffic, in order to avoid traffic disruption, it is necessary to
avoid an intermediate support, which reduces traffic jam and waiting time. I
illustrate the impact of traffic diversion on traffic safety by analyzing a
previous renovation work on the M1 motorway. During the research, I compare the
traffic diversion accident data with the control section. The control section is
the same road section, with the same length of time, before the renovation in
this study. The comparison confirms that traffic disruption should be avoided
during bridge construction. It is economically justified to build
steel-composite bridges, but it is necessary to deviate from the cast-in-place
on concrete construction of deck slab, because it requires traffic diversion. I
present new construction technologies for the construction of steel-concrete
composite bridges, which can be used to ensure road safety. Overall, the raising
the degree of prefabrication results in the avoidance of traffic disruption.
Among construction technologies, economic aspects are typically decisive, such
as the availability of human resources, capacity utilization and reduction of
construction time. We developed a new construction technology for achieve the
deck slab of steel-concrete composite bridges with less human resources, in a
shorter time, with the available capacities, more economical construction and
without traffic disruption.