Vízügyi Közlemények, 1979 (61. évfolyam)

1. füzet - Böcskei László-Écsi Imre-Nagy Gábor-Vigh Zoltán: A mosonmagyaróvári duzzasztómű építése

A Mosonmagyaróvári Duzzasztómű 41 Construction of the Mosonmagyaróvár Weir By L. Böcskei, Mech. Engr., I. Écsi, Z. Vigh, Civ. Engrs. and G. Nagg Engr. The Moson Danube Arm controlled by the weir runs parallel to the Hungarian upstream section of the Danube. The drained marsh areas called Lébényi-Hany and I'rincz-Hang (Fig. 1 ) are situated to the South of this Danube Arm. In this area more effective farming depends on irrigation. The project supplying water to the fields has been realised in several stages. In the first stage the Mosonmagyaróvár Weir ( Fig. 2), further the principal and lateral irrigation canals have been constructed together with the attendant structures representing a total value of round 90 million Ft. The necessary discharge of 5,2 cu.m/sec is diverted from the Moson Danube, the required headwater level being maintained by the weir situated in Ihe stream bed. The gates are of the tilting leaf type and controlled by hydraulic hoists, the oil supply for which is provided by electrically driven pumps. Construction work on the intake structure and the weir are described here. Owing to the proximity of the autoroute E-5 connecting Vienna and Budapest, the intake works consist of four connected structures. The intake gate ( Fig. 4) lias been constructed by conventional methods in a pit dewatcred by pumping. The closed conduit section under the motorway and the railway line has been constructed by the pipe jacking method ( Fig. 5) in order to save costs and to maintain undisturbed traffic. The weir has been constructed in several stages ( Fig. 7 ), with foundations consisting of open r.c. caissons, the bottom of which was concreted under water. The r.c. caisson of 315 sq.m. area and weighing 1200 tonnes has been cast in the stream bed in an area surrounded by a ring dyke. The concrete has been mixed, transported and placed at the site using mechanical equipment of coordinated capacity. The controlling items in this fleet were two positive action mixers of Type MR-500 manufactured in the GDR, while for transporting the concrete a pump of M-500-E type manufactured in Czechoslovakia was used (Fig. 10). The r.c. caisson has been sunk by the conventional method using excavators with clamshell buckcts ( Fig. 11 ). By well organised work sinking was accomplished in a period shorter than envisaged (Fig. 12). The impervious underwater concrete slab represented a volume of 1100 cu.m and was placed by a piston-type concrete pump by RábaSchwing instead of the moving-funnel (tremie) method used earlier. In this way substantial savings could be achieved in both the time and cost of concerte placement. The concrete l'or the base and the bottom slab ( Fig. 14), further for the r.c. piers, brige structure and reteaining walls (Figs. 15—17) was again placed using the M-500-E concrete pump. The concluding part is devoted to the organisational aspects of construction work started on March 15,1976, stating that construction work on the weir commissionned on April 30, 1978, involved the placement of 2800 cu.m. in-situ concrete, 144.4 tonnes of reinforcing steel and 2685 cu.m. of rock. * * * Itau der Stauanlage zu Mosonmagyaróvár von Dipl.-Maschinenbauing. László Böcskei, Dipl.-Ing. Imre Écsi, Dipl.-Ing. Zoltán Vigh und Ing. Gábor Nagy Am oberen Lauf der ungarischen Donaastrecke befindet sich der mittels Wehraulagen ausgeschalteter Mosoner (Wieselburger) Donauarm. Vom Süden schliessen sich ihm die entwässerten ehemaligen Sumpfgebiete Lébényi-Hany und Princz-Hany an (Bild t.), deren wirksame landwirtschaftliche Nutzbarmachung nur unter Anwendung der Bewässerung möglich ist. Das Bewässerungssystem wird in mehreren Etappen ausgebaut. In der ersten Etappe wurden die Stauanlage zu Mosonmagyaróvár