Hidak Tolna megyében (Szekszárd, 2002)

dr. Gáspár László: Summary (angol nyelvű összefoglaló)

Danube-bridge at Dunaföldvár, four flood area Danube-bridges, five Sió-bridges, five bridges over the Kapós and Sárvíz. They were reconstructed temporarily before 1947, then these bridges were rebuilt intensively from 1950 on. The reconstruction was carried out among very hard conditions, in several cases wreck matériái was used or the intact parts of somé other bridges were utilized in the construction. The prefabrication and the prestressing of reinforced concrete bridge superstructure started in county Tolna in 1953. 52 bridges of 2-10 m spans were built using reverse T-beams (socalled FT-beams). Several bridges were completed in the county using EHGE and EHGTbeams of 10-30 m spans which are appropriate for longer spans. The longest in the county, a bridge over a railway is a 237 m long one with 11 spans in Szekszárd. Close to Simontornya, a monilithic reinforced concrete girder bridge with box cross section was built in 1969, it has the longest (55,5 m) span in Hungary. The reinforced concrete bridge stock is varied: box structure (e.g. overpass at Bonyhád in 1952) hauling cabled through arched bridge (e.g. Sióbridge at Simontornya in 1953), post-tensioned slab bridge (e.g. Kapos-bridge at Dombóvár in 1954), simple beam, cantilevered girder bridge, facilities with various prefabricated girders. An important achievement of the steel bridge construction after World War II was the Danube-bridge at Dunaföldvár which is a continuous truss bridge liké its predecessor although its main girders have a higher loading capacity for ensuring the later further development of the bridge. It was recently (2000-2001) rehabilitated when - maintaining the traffic on the bridge - a steel deck with cross ribs was carried out instead of reinforced concrete deck. The Danube-bridge of 920 m length close to Szekszárd is under construction which will be the longest bridge of the Hungárián national road network. The 11-spanned Danube-bridge has a continouos box girder, its 5-spanned river part is built with steel deck, while the 3-3 spans in flooding area are bound with the reinforced concrete bridge deck. Every river-span element is transported in 5 units in tow-boats on the Danube from 140 km distance. The elements are lifted to their final position by the help of already proven facilities of 1600 tons totál loading capacity. The great importance of this bridge construction is that it is the first new Danube-bridge in Hungary built southwards from Budapest during the pást 72 years. The bridge stock of county Tolna: 275 bridges on national highway network, 439 bridges managed by municipalities and the propriators of priváté roads, as well as 101 railway bridges. There are several important and remarkable railway bridges, the book deals alsó with them. The railway bridge across Siócanal at Simontornya is a special one since a span of the Danube-bridge was utilized here in 1954 as a temporary structure, this structure of more than 100 years served here till 2000. The present publication on the bridges of county Tolna is the tenth of this series. Its structure with many figures and photos, as well as sources can be taken as very similar to the former ones. Its main chapters: the geographical features of county, development of road network and bridge stock, bridge construction techniques: timber, stone, steel and reinforced concrete bridges, bridge reconstruction after World War II, the county 's bridge stock: on national roads, on local (municipality) roads, railway bridges, individual description of major bridges, appendices: archive materials, geometrical designs, maps, statistics, annex: mini lexicon, chronological review, references. The authors of the present publication are János Kaczián, dr. Gábor Töttös, dr. Imre Gáli and dr. Ernő Tóth, while dr. Herbert Tráger performed the tasks of reader. The revealing of bridges' history was aided by archives, museums, a county road managing firm, generál directorate of State Hungárián Railways, designers, construction firms, postcard collectors and several others. 204 SUMMARY