Vízügyi Közlemények, 1973 (55. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
— first stage: 8 Siemens machine houses, each of 1000 lit min capacity, with 10.15 m deep wells spaced at 8 m centres; — second stage: 7 vacuum machine houses of 1000 lit min capacity each, with 7 m deep vacuum wells spaced at 1.8 m centres; — third stage: 4 vacuum machine houses and 1 Siemens type machine house with the corresponding well points; — fourth stage: 1 Siemens machine house and 7 deep wells with 170 lit/min capacity underwater pumps in the area of the powerhouse. The groundwater-lowering system functioned practically free of troubles for over four years. The discharge delivered ranged, in fair agreement with the figures predicted, from 20 to 60 lit/sec. The record of groundwater levels observed in 1970 in the observing well (Fig. 2.5 — 8) on the river-side of the ring dike is shown in Fig. 2.5 —7, together with the record of discharges over the measuring weir through which all waters lifted from the construction pit were passed. The only difficulties encountered in the course of groundwater lowering operations were due to the iron deposits in 5 of the deep wells sunk and operated in the area of the powerhouse. 2.6 Bereczkey, G., Horváth, F. and Dr. Merényi, M.: The steel structures and hoisting equipment at the Kisköre Barrage (For the Hungarian text, see pp. 145) At the barrage and at the headworks of the two main irrigation canals 28 different control organs and hoists are mounted with a total weight exceeding 3000 tons. The hoisting equipment was supplied by the firm ORSTA HYDRAULIK (German Democratic Republic), the pivots for the radial arms, by the firm DEVENTER (German Federal Republic), while the large steel structures have been manufactured by the GANZ-MÁVAG Factory, Budapest and the electric equipment by VERTESZ, Budapest. Steel of 37B quality was used for the load-bearing structural element, high-strength steel of 52 С and 52 D quality, for the stop-logs of the weir and for certain components of the radial gates and steel of 38—37 Y quality, for less important structures inferior grade. For dimensioning the structures special design specifications were compiled taking other standards also into consideration. The dynamic water loads on the steel structures were determined by model tests at the laboratory of the Research Institute for Water Resources Development, Budapest. The stresses arising around the pivot of the radial gate in the concrete, further in the 5.5 ton steel disc casting (Fig. 2.6 — 1 ) transmitting the load from the 2.2 m diameter cylinder to the 650 mm diameter pivot, were determined in models and by photoelastic methods at the structural laboratory of the same institute. The force transmitted from the radial gate to the pivot was found to be 860 tons. 279
