Hidak Fejér megyében (Székesfehérvár, 2006)

Függelék

Függelék Sárvíz by Úrhida and Nádasdladány. In the 20th century, three railway bridges across Sárvíz were constructed using steel superstructure. The second Hungarian reinforced concrete bridge was built by Sárbogárd using Monier-system. Unfortunately, this slender bridge of 18 m span was destroyed together with several other ones during the World War II. In addition to several minor reinforced concrete bridges, Szilárd Zielinski - the "creator" of Hungarian reinforced concrete bridge construction - completed the plans of bridges on Sió in 1914. It was only some 15 years later when the Gerber beam bridge of 32 m span was constructed in a slightly modified form which is still the longestspanned bridge of the county. The Váli-víz-bridge by Sörkevár built in 1914 was also a major structure (it is on the present main road no. 6). Significant reinforced concrete bridges were constructed when the present roads no. 7 and 8 were reconstructed in 1934-35. Pál Sávoly was the designer of the frame structured bridge of 45o scew above railway by Dinnyés, and the Gaja-bridge by Székesfehérvár, as well as several bridges of the main road no. 7 above railway lines. Of these, only the Gaja-bridge is still standing, although widened and strengthened. In the autumn of 1944 and the spring of 1945, 89 highway bridges were destroyed in the county. Their reconstruction was a highly difficult task due the lack of necessary conditions. The reconstruction works were done ingeniously using several methods. The bridge above railway by Dinnyés were constructed using a completely new structure. In several cases, the new bridge was built based on the original designs, although, it ocurred that the reconstruction was performed in a new location (Szabadbattyán). Several bridges with steel girder and reinforced concrete slab were built. Actually together with the reconstruction activities, the main roads no. 6 and 81 were reconstructed. As a part of the former activities, novel (e.g. Vlegged) bridges over the railway in a new track by Dunapentele were built. The main road no. 81 was reconstructed in a new track building new reinforced concrete box bridges. New techniques (tensioning and prefabrication) presented itself in the bridge construction: a precast girder bridge of Hoyer-system over the Hegyeshalom-railway by Szár and a precast slab lane superstructure by Sárszentmihály were built. From 1962 on, so-called FT girder superstructures have been built in the span range of 2-10 m, usually with driven piles {55 bridges have been completed by now using this technique). From 1975 on, the construction of EHG-precast girder bridges started which had been developed for i l-# - - Nummary the building of bridges with spans higher than 10 m. First, the totally precast bridge by Kápolnásnyék should be mentioned the pillars of which were about 12 m high. The bridge over the main road no. 7 and the railway line to Nagykanizsa is a successful example of prefabrication. Two bridges by Polgárdi and by Dinnyés had been effected by corrosion damages; the first was reconstructed to a two-spanned EHGT permanent superstructure (1984) and the other one to a three-spanned similar structure (1987). Various precast bridge girder types were applied in the county, among others, KCs-girder in 1981 (there are seven bridges of this type in county Fejér). The bridges of the motorway M7 built in 1965-75 are to be mentioned with an emphasis. They are mainly monolithic with varied substructures and superstructures. These motorway bridges are the most aesthetic ones in the country. The pedestrian bridge with V-leg by Kápolnásnyék is the most slender one. On the western by-pass road around Székesfehérvár, 12 bridges were built using EHG/F and FCI girders with maximum spans of 26.0 - 31.6 m in 1999-2005. The construction of steel bridges has become important in the county from 1999 on. A special attention should be paid to the novel truss welded railway bridge (without bottom chord) on the Székesfehérvár-Komárom line, the pedestrian bridge to Alba plaza in Székesfehérvár, the 10spanned, composite bridge of motorway M6 over the railway which has 21o skewness as well as the Danube-bridge by Dunaújváros. The flood plain structures of Danube-bridge (17 spans) are 1369 m long, they are multi-span, continuous box girder structures with orthotropic slag. The river structure is a 307.8 m spanned girder bridge suspended to a "basket ear", a world recorder in its category. The main beam is made of steel type S460 M/ML The river span will be transported to its place by flotation this year. The distribution of the county bridge stock is as follows: 83 motorway bridges, 264 national highway bridges, 231 local highway bridges and 160 railway bridges. Due to the running motorway constructions, the bridge stock will grow considerably, especially in bridge surface. The book presenting the bridges in county Fejér, the 14th volume of the series is estimated mainly to professionalists, however, their illustrations can inform anybody interested. The book has the following chapters: geographical and hydrological conditions, the forming of the highway system, early bridge history, timber 217