SU937600A1 - Method of constructing a hydro-electric installation with concrete dam and dam-adjoining power station - Google Patents

Description

one/

The invention relates to hydraulic construction and can be applied in the construction of structures of a hydroelectric complex with a high concrete dam and dam hydroelectric station.

There is a method of erecting a gravitational dam with a near-dam hydroelectric station, in which construction work is carried out in two stages with fencing of pits in the bed with bridges and passing water at the first stage through the constrained bed, and at the second stage through temporary spillway holes stage of construction. Moreover, the drainage holes are first made in the form of a comb, representing a series of open weirs with a wide low section and a large span. The holes in the combs are subsequently rebuilt by partially embedding them into the bottom openings of the first stage, and the latter, in turn, at the final stage of construction are rearranged into the bottom openings of the second stage 1.

The disadvantages of this method are: the complexity and laboriousness of the work on the double reorganization of temporary outlets, carried out in cramped conditions; the complexity of the dam design caused by the device in the body of the construction of the shutter chambers for the gates, blocking the bottom holes of the second

Stage 5, which dramatically worsens the conditions for the production of works on the construction of the dam, it is difficult to use flow technology; the need to build a hydropower plant in the pit of the second construction phase, which

, Q causes a delay in its commissioning.

There is also known a method of erecting a hydroelectric complex with a concrete dam with a dam hydroelectric power station, including the phased construction of structures with a barrier of pits in the stream of bridges and skipping construction costs at the first stage through the restricted bed and later

2Q made in the form of a comb, and the bottom openings of the first and second stage 2.

Claims (2)

The disadvantage of this method is the delay in commissioning of the hydroelectric power station, which is being built in the second stage of construction. The purpose of the invention is to accelerate the commissioning of hydroelectric power plants. The goal is achieved by arranging the bottom openings of the second stage in a dam erected at the second stage of construction. With this arrangement of the first and second line culvert openings, it becomes possible to build a near-dam hydroelectric station behind a high dam in the foundation pit of the first stage of construction, since construction costs at the final stage of construction are skipped on another section of the dam (outside the building of the hydroelectric station). FIG. 1 shows a view of a gravity dam from the upstream side; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 1. The method is carried out as follows. In the construction pit of the first stage, the station dam 1 was erected to the non-flooded marks at subsequent flood passes through temporary outlets, the lower part of the HPP building 2 with bulls 3 and separate abutment 4. In most sections of the station dam 1 arrange the bottom holes 5 of the first stage and the holes combs 6. The bottom openings 5 on the upper side are equipped with gobies 7 with grooves 8 for closures. Construction costs at this stage of construction pass through the riverbed constrained by bridges. When the construction, being built at the first stage of construction, is ready to skip the construction costs, the channel is cut off and the second stage of construction is started and, in particular, the construction of the spillway dam 9 is arranged, arranging in the lower part the bottom openings 10 of the second stage, equipped with bottom 11 and upper grooves 12 for valves. Construction costs at this stage of construction are passed through bottom holes 5, and when passing through the floods, the holes of comb 6 are also used. After the dam in the pit of the second construction stage is erected, to the marks exceeding the maximum possible water level in the downstream, the bottom ones are broken openings of the second stage 10 and close up the openings of the comb 6, and then the bottom openings 5 of the first stage Complete the construction of the hydroelectric station and at the same time erect a structure along the entire front with Along the height of the station dam 1 and the adjacent deaf dam 13, the flood passes over the unfinished spillway dam 9. As soon as the construction is ready, raise the water level in the upstream to the starting marks and commission the first priority hydroelectric units using temporary water intakes 14. Finally, they complete the dam to its full height and raise the water level in the upstream to the design elevations. In this case, the bottom openings 10 are sequentially closed and sealed. Temporary water intakes 14 are closed up and all HPS units are put into operation according to a permanent scheme. The proposed method makes it possible to erect a dam and a building of hydroelectric power stations with a significant advance in terms of time compared with the known methods. Due to this, commissioning of high-priority aggregates at low heads can be accelerated. The invention The method of building a waterworks with a concrete dam and dam hydroelectric station, including the phased construction of structures with a fence pits in the riverbed jumpers and skipping construction costs in the first stage through the constrained bed, and at a later stage (after closing the channel) - through temporary spillway holes made in the form of a comb, and bottom openings of the first and second stage, characterized in that, in order to accelerate the commissioning of the hydroelectric power units, the bottom STI second stage of the suit at the site of the dam, erected in the pit of the second stage of construction of hydropower. Sources of information taken into account during the examination 1.Nikolaev Yu.G., Yakobson A.G. Passage of river flow during hydrotechnical construction. M., “Energie, 1978, p. 20-23, FIG. 1.5, 1.6. 2. Start-up complex of the first hydraulic unit of the SaNo-Shushchenskaya HPP. - “Hydraulic Engineering, 1979, No. 2, p. 1-6, rice, 1-2. and Ib (ABOUT I "l & "50 I f to C & loX ten Pa FIG. 2