Vízügyi Közlemények, 1999 (81. évfolyam)

1. füzet - Galbáts Zoltán: A gyulai duzzasztómű felújítása

134 Galbáts Zoltán völgyi nagymütárgyak állapotvizsgálata. Terv. felelős: Huszár L.-Csecskedy G.-Ivaskó L.-Galbáts Z. (KONSTRUKTŐR Mérnökszolgálati Kft.-KÖTIVÍZIG). Gyula. 1996. Konstr. (KONSTRUKTŐR Mérnökszolgálati Kft.): Gyulai tüsgát rekonstrukciója. Kiviteli terv. Terv. felelős: Bunyevácz V.-Iványi I.-Göllner L. KONSTRUKTŐR Mérnökszolgálati Kft. Gyula. 1997. Konstr.-PUV (KONSTRUKTOR Mérnökszolgálati Kft. - P.U.V.): Gyulai tüsgát rekonstrukciója. Tömlősgátas elzárás. Kiviteli terv. Terv. felelős: Kozjak J. KONSTRUKTŐR Mérnökszolgálati Kft. -P.U.V. Gyula. 1997. KÖVÍZIG (Körös vidéki Vízügyi Igazgatóság): A gyulai tüsgát fiók-duzzasztójának terve. KÖVIZIG. Gyula. 1976. KÖViZIG (Körös vidéki Vízügyi Igazgatóság): A gyulai duzzasztómű és fenékgát üzemelési szabályzata. KÖVIZIG. Gyula. 1990. Pósa К. : A Fehér-Körösben Gyula mellett létesítendő Poirée rendszerű duzzasztó mű építési leírása. A duzzasztó mű iratai és kiviteli tervei. Gyula. 1896. Renovation of the Gyula river barrage by Zoltán GALBÁTS, C.E. The river barrage of Gyula (Fig. 1.) was constructed in 1896. The river dam enabled water abstraction from the River Fehér Körös (White Körös), across the feed-sluice built into the main flood levee, into the Canal Élővíz. The river dam is a bar-weir of the Poireé-frame type (Fig. 2.). Its main parts are: the dam, upstream and downstream floors, bar-holder, frames. The weir-bars are supported by the frame. The body of the dam was made of concrete. Its length is 30 m, its width is 8.00 m, while its depth is 2.00 m (Fig. 3.). In ice-free periods the maximum headwater level is 86.77 + 1.80 meters above Baltic Sea level (m. aBS). Full closure can be made with 292 bars of 10 mm width each. The bars are pressed against each other by sealing wedges. A separate bar-lifting device facilitates their removal. There is no other river barrage upstream of this dam and this makes the barrage of Gyula an independent facility. The frame supports are steel structures of nearly 100 years of age. The main problem is, however, not associated with the age of this structure but with the difficulty of operation at flood. The bars must be removed from the flood-plain before the flood arrives and can be reinstalled after recession only at 1.00 m water depth. This disassembling-reinstalling procedure must be repeated several times a year with heavy physical labour, under accident-prone conditions, and with great expertise. This type of difficult operation must be terminated by replacing the structure with some other up-to-date device, which allows more simple maintenance and operation. The study plan of reconstructing the river barrage of Gyula included the analysis of six technical alternatives. Each of this alternatives included the full renovation of the channel, the bank-protection facilities, the dam, the auxiliary structures on the river bank, and the electrical and telecommunication systems. Four alternatives (A-D) out of the six ones planned the use of electrically- (oil)-hydraulically operated tainter gates in the opening, which is to release floating debris. For the weir opening the following facilities were planned in the various alternatives: — For Alternative A the full reconstruction of the bar-weir of the Poireé-frame type was contemplated; — For Alternative В electro-hydraulically operated tilting-gates were designed; — For Alternative С a hose-type weir of small dimensions was planned; — For Alternative D a large hose-type weir was to be built, along with the removal of the bottom-sill; — In Alternative E the original arrangement of debris-release and weir openings was kept, while the head water level would be increased with the help of raising the crest level of the dam and the size of the closure facilities (hose-weir or steel tilting-gates); — In Alternative F the whole river dam was to be fully reconstructed, altering the width of the openings and increasing the height of the fixed-dam and the moveable parts by 0.5 m.