Vízügyi Közlemények, 1974 (56. évfolyam)
2. füzet - Rövidebb közlemények és beszámolók
Az OVH Vízgazdálkodási Tröszt 317 и) Для колодцев небольшой глубины (8—15 м) и большого диаметра (1,0—1,2 м), для создания их подошвы были установлены гидравлический перекладчик труб большой мощности и грейфер (рис. 15), который состоит из ковша верхнего управления с объемом 0,5 м 3, из особых грейферных ковшей и из гидравлических оборудований (трубо-перекладчика и нагнетательной установки). к) В Венгрии большой задачей является — одновременно и типичной — исследование и использование пластовых вод большой глубины. Поэтому запроектировали современные типовые оборудования, пригодные для бурения 300 м и 500 м (рис. 16 и 17). Оборудования были изготовлены в несколько экземплярах и установлены на припепях с двумя осями с несущей способностью 8 Мп. * * * Activities at the WW Water Management Trust in the field of technical development By Bognár, Győző, Civ. Engr. Coordination and guidance of technical development activities within the water management sector in Hungary is the responsibility of a special section at the National Water Authority. The improvement and perfection of technological and productive equipment lias been assigned to the Water Management Trust controlled by the National Water Authority. The related activities are described in two parts: Part I is devoted to the basic principles of the policy and target oriented programmes on which the current development activities are founded, as well as to the activities of the Trust. In Part II some results are quoted from the fields of maintenance work on hvdroteclmical structures and industrialization of hydrotechnical construction. 1 Some of the technological solutions developed in the latter domain are described as follows: a) Under the moderate climate of Hungary pressure pipes of hard PVC are used, but for lower, or substantially higher temperatures the material of the pipes is polyethylene. Por special requirements or circumstances fibreglass pipes are adopted. b) For elevated water tanks the concreting technology involving the use of slip forms has recently been adopted. The tank part for these is prefabricated at the terrain with capacities ranging from 600 to 7000 cu.m and is lifted subsequently using hydraulic jacks ( Figs. 1 and 2). The elevated tank shown in Fig. 4 has also been constructed using the slip-form method and the hydraulic hoisting has been used for laying the 240 m long section of the 1000 mm diameter steel pipe line (Fig. 3). c) The use of prefabricated elements for the construction of structures .in communal water utilities is illustrated in Figs. 5 and 6, the first showing the combined structure of a wastewater treatment plant, the latter construction work in progress on the 1350 cu.m capacity basin of a water works. d) A method most suited under conditions in Hungary has been developed for the construction of slurry trench walls, using equipment of the Italian firm Titania. Construction work for the slurry trench wall of a quay wall along the Danube and for the foundation of an apartment housing development is illustrated in Figs. 7 and 8, respectively. e) The solution adopted for the design of prefabricated minor bridges over canals is shown in Fig. 19 The degree of préfabrication is 95% and a team of 6 can mount a 3-span bridge in 3 to 4 clays. The span of tlie standard bridge design may be 4, 6 or 8 m. f) A fleet of equipment and technology has been developed for the Bantam-Hydroseeder as the principal machine. In the first operation a mixture of grass seeds, water, herbicide, fertilizer and a stabilizing compound is sprayed over the surface to be seeded (Fig. 10), while in the second operation (Fig. 11) я mixture of mulch and a binding agent is spread over the seeded surface.
