Author(s): V. N. Zhulenkov
Linked Author(s):
Keywords: No Keywords
Abstract: As far as we know the water supply system for the user must be uninterrupted and have respective quality including the temperature, presence or absence of mechanical or organic impurities and so on depending on economic or industrial activity of the user. However, the special place is taken here by withdrawal constructions situated near rivers with the unfavorable, often extreme, hydrothermal regime, with special shuga formation on the river during freeze-up period and with large ice jams in the period of high water in the spring. These conditions bring to often interruptions of withdrawal construction working. According to that in the aim to increase the maintenance reliability of the constructions for water withdrawal out of the surfaced reservoirs in Siberia and Far North the author suggested the constructive-technological modification of the known filtering construction, considered below, executed as coastal filling of sorted rock material with perforated withdrawal pipelines inserted into the filling. The water having been filtered enters the filling body. This water flows along self-flowing pipelines to the pump-house of the first rise [1]. There is also a withdrawal construction including filtering enrockment dam constructed by unsort rock material and using the aid of face filling. This dam protects the allocated section of water area with a particular depth and temperature stratification and also the pump house delivering the water filtered through the dam into the water supply system for the user [2]. In the first case the weak point of the technical decision is the fact that during the withdrawal constructing there appear technical difficulties when it is necessary to carry out the laying and joining under water the collectors and self-flowing pipelines deepened into coastal gulf near which it is necessary to install the water catch construction, laid on the same depth, made of the more expensive sorted by large-size rock material. In the second case the weak point of the decision is the fact that when the construction is situated on the river embankment with high water during the flood in spring and when there is a large ice regime the filtering dam must be sufficiently high to enclose the water area from ice penetrating into it, this will lead to increasing the rock filling in the dam body and construction cost.
Year: 2004