Vízügyi Közlemények, 1999 (81. évfolyam)
4. füzet - Rövidebb tanulmányok, közlemények, beszámolók
706 Göncz В.— Kerti A.—Kolesz ár J. The regulation plans of the catchment area of the River Túr had to be modified. The new plan included the construction of flood levees on both sides of the river between the new "Trianon" border and Sonkád. 12 river bend cutoffs shortened the river reach by 18.6 km. A canal of 11.5 km length was constructed between the distribution structure of Sonkád and the new confluence with the River Tisza. The canal was also protected by flood levees on both sides. The abandoned old channel of the River Túr gained a new fonction, acting as an excess water drainage canal, and was named as this (the Túr Excess Water Drainage Canal) on the maps and in the inventories (Figure 1.). Levees of the Canal were designed with a flow cany ing capacity of 167 m 3/s. In order to "bridge" the height difference between the bottom of the canal and the low water level of the River Tisza and to enable the safe discharge of the flows of the River Túr into the River Tisza a weir was constructed in the mouth section, near the village Tiszakóród. This structure is called the "Mouthsection Weir of the River Túr " or just the "Túr Weir" (in the common language) (Figures 2. and 3.). The development plans were implemented in the period 1926-1930. The weir is 42.3 m long. The part of the weir in the channel is 28.7 m long and consists of a reinforced concrete frame, which connects to the river bank with wing-walls. The structure is split into five chambers of equal size by four interim beams. There is a bottom outlet structure on the right-bank side, to release sediment, which connects to the right bank with a walk-way bridge. The gates of the outlet sluice can be operated manually. The slopes are covered by rip-rap laid into cement mortar. The 14 m long reinforced concrete slab of the tailwater head is bordered by an energy attenuating sill. Below this a rubble mound connects to the bank-protection structures of the River Tisza. The crest of the weir is 1.8 m higher than the bottom level of the canal and 4.5 m higher than the tailwater level. The structure is protected by Larssen steel sheet piles form the backwater side, while wooden piles protect the other sides (Figure 4). Conditions of the structure had been surveyed several times and smaller-and-larger repairs were made. However, full reconstruction was made in only in 1997. A full review of the conditions of the structure, with special regard to the concrete works, was first made in 1982 by the Water Resources Research Centre VITUKI. These investigations also included the determination of vertical displacement. Conditions of the structure were continuously deteriorating, since no reconstruction of the reinforced concrete elements was made, although it was suggested after the detailed survey. In 1996 the urgent reconstruction of the structure was decided, because the deterioration of the structure reached the level of high risk. The local water authority appointed the VITUKI Consult Pic. with the full survey of the weir and the determination of the extent of the reconstruction works. The reconstruction plans, made after the detailed survey of the conditions of the structure, included the following elements: The reinforced concrete structure The surface of the concrete was fractured and cracked, the plaster was pealing off and the whole surface showed serious concrete erosion. Cavities occurred at several places and the reinforcing steel showed on the surface. Consequently the whole concrete surface had to be cleaned, the cavities cut out and filled in. Reinforcing steel, showing on the surface received treatment and the whole surface was lined with wear-resistant concrete (Figure 5.). The reinforced concrete structure was broken through at several locations. The fractures were cleaned and injected with water-tight materials. A technical solution had to be found, which secures the connection between the broken concrete parts, but does not form a rigid structure. The hard-wood cover of the weir edge crumbled away and the fixing loops were broken. The concrete surface was decaying. The concrete surface was repaired, new fixing loops were installed and the hard-wood beams replaced (Figure 6.). Steel structures The steel structure of the sluice was corroded, deformed and the sealings deteriorated. The gate slabs had to be completely replaced. The moving facilities, rails etc. had to be repaired, treated and painted.
