Vízügyi Közlemények, 1935 (17. évfolyam)

Kivonatok, mellékletek - Kivonat a 2. számhoz

21 sed air (fig. 3), and it was found that cavities of large extent existed below the foundation plate of the suction basin. In order to restore the pumping plant, the whole building was first surrounded with a concrete mass (fig. 4—5), which was done by pressing 225 cubic metres concrete mortar into 360 holes bored to a depth of 2 metres below the foundation. This concrete mass quite enclosed the endangered building, like sheet piling. Then the undermined spots were filled by pressing-in 118 cubic metres of concrete mortar through 129 holes. The suction basin and the canal leading to it were provided with a 15—20 cm lining made of torcrete-concrete with a mixing ratio of 1 : 6. At two spots of the suction canal vertical ribs of 40 X 60 cm cross section were constructed jor the purpose of stiffening the concrete lining (fig. 7). The total cost of the works «mounted to 66,137 pengő, 49 pengő falling to each square metre of area protected. VIII. RESTORING WORKS ON THE PUMPING PLANT AT KÖLKED. By J. ZEITVOGEL. (Pages 272—276.) The article describes the restoring works on the pumping plant built in 1901 near the Danube on quicksand soil. The work was done by pressing cement mortar into the soil below and around the pumping plant. This resulted in restoring the building, which had been cracked. The suction basin was also rendered watertight by a lining of torcrete-concrete with reinforcement. Shortly after completing the restoring works, a high icy flood flowed down the Danube. On this occasion those appearances which had previously threatened ruin to the building, did not recur, proving the success of the works. IX. MAINTENANCE OF WATER SUPPLY SYSTEMS. By L. VOJCSIK. (Pages 277 -297.) The proper maintenance of a distribution system is of great importance both from the technical and the economical points of view, because the costs of the pipe system form a considerable part of the total sum invested in the water supply works. Interests of great consequence, such as fire protection, public hygiene, maintenance of roads, security of traffic, protection of other utilities, etc., are involved in peeping the pipe system in good preservation. The basis of a proper maintenance is the exact registration of the pipe system and a well organized supervision service. The distribution system and its accessories have to be examined from time to time. It is advisable to wash out the pipes and the basins at least twice a year,