SU1535914A1 - Method of constructing hydraulic station with concrete dam - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to simplify the production of works, accelerate construction and reduce its cost. When erecting a hydropower station with a concrete dam, a weir with a wide threshold is arranged on the dam site erected in the second-trench pit. After skipping the flood, build up the spillway with a concrete massif containing bottom and deep holes. This provides the opportunity to carry out construction and installation work in the first-trench of the foundation pit continuously, regardless of the hydrological regime of the river. 7 il.

Description

The invention relates to hydraulic construction, in particular to the construction of structures for power plants with a high concrete dam, built on high-flow rivers with large annual flow irregularities.

The purpose of the invention is to further simplify the production of works, speed up construction and reduce its cost.

FIG. 1 shows a view of the channel part of the dam of an energy hydroelectric complex from the upstream side; in fig. 2 - weir with a wide threshold at the second stage of the dam construction, cross section; in fig. 3 a weir, built up with an array with bottom and deep holes in the third stage of the dam construction, a transverse section;, FIG. A and 5 of the dam along the deep and the orifice in the fourth stage of the erection of the structure, transverse sections, respectively; in fig. 6 shows section A-A in FIG. 3; FIG. 7 is a section on BB in FIG. 3

The method is carried out as follows.

Using known techniques, bridging a part of the river bed, passing its flow through the remaining part of the living section, and organizing the first-stage excavation. In it, the station side of the dam 1 is erected with the advance growth of its upper zone, as well as a separate section 2, in which bottom outlets 3 are equipped with valves of known types.

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Then, in the low-flow period, low-water bridges of the narrowed part of the riverbed are overlapped, the river flow passes through the waterways 3, the weir 4 is erected in a trench of the second stage with a wide threshold to the bottom-free bottom, the base plate 5, downstream gobies 6 with grooves 7 for traverse obstacles and a fastening plate for 8 rocks in the downstream. I Under the weir 4 galleries arrange 9

The above works were carried out during two interflood seasons with the flooding of the excavation at the skipping of the flood.

After passing through the flood spillway and lowering the water level in the upstream by using the ventings 3 above the spillway and stove 5 under the protection of the barbed barrier 10, lowered into the grooves 7, concrete array 11 is mounted with riding bulls 12, in which grooves 13 are arranged. the bottom openings 1 and the top portions of the deep openings 15 having the same cross section. After the erection of the massif 11 from the gallery 9, they arrange the cementing curtain 16 and the drainage of the base 17. In the first-trench of the first stage, the station dam is erected to the marks not filled by the next flood, and the construction work on the hydroelectric power station is started (not shown). The next flood is passed through the openings and 15, the outlets 3, and also over the array 11 through the aperture 18. After passing the flood, the openings and 15 on the upper side are closed by the gates 19, and the lower side is covered with a barrier 10. The bottom part of the deep openings 15 are completed, concrete the arrays of springboards 20 and the toe 21 of the operational weir 22. Inside the sock 21 arrange the breech chamber 23 and the room for the drives, assemble the working segment closures 25 and the repair breeches 26. The next Russian dam 27 is erected with its top the second part to launch marks leaving a closure channel 28. Manufact.:WEEKE m terminations bottom opening, in the first phase pit podgotav5

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First-priority units with water intakes 29 in the station dam 1 are commissioned for commissioning.

Raise the dam along the entire length of the pressure front to the unsinkable marks when passing the tip. The passage of the next flood is made through the deep holes 15, the outlets 3, the primary aggregates with the water intakes 29 and, if necessary, through the blockhole 28.

Further, using the same methods, they complete the dam to the design marks, carry out works on the device of the production weir 22, then the outlets 3 and the deep holes 15 are closed and, as soon as they are ready, commissioned units with water intakes 30.

The use of this method will allow, in comparison with the project for at least 1 year, speed up the commissioning of high-priority hydroelectric units at an intermediate head and obtain a significant economic effect due to the cost of the additionally generated electricity.

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The method of erecting a hydropower plant with a concrete dam, including the phased construction of structures with alternate fencing of trenches in the bed of bridges and phased skipping of construction costs, while construction costs are passed through the constrained bed at the first stage, at the second stage through the bottom outlets in the section and the spillway with a wide after the channel is cut off, at subsequent stages through the above-mentioned outlets, bottom and deep holes, and during floods, also through holes in the unfinished dam , with the fact that, in order to simplify production, speed up construction and reduce its cost, spillway is arranged on the dam site erected in the second stage of the foundation pit, and after skipping the flood, overflow the spillway with a concrete mass containing bottom and deep holes.

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Claims (1)

Claim A method of erecting a hydroelectric facility with a concrete dam, including the phased erection of structures with alternate fencing of pits in the riverbed with bridges and a phased passage of construction costs, while construction costs are passed through a cramped channel at the first stage, and through a bottom outlet in a separate abutment and a spillway with a wide by the threshold after the channel’s closure, at subsequent stages through the aforementioned gutters, bottom and deep holes, and during floods, also through the openings in the unfinished dam, cast I ayuschiys that, in order to simplify the production of work, speed up construction and reduce the cost, arrange weir at the site of the dam, erected in the pit of the second stage, and after the discharge of flood build on the concrete spillway array containing bottom and deep holes. J I-I uU-H (third stage) 1,53591 ** I-1 (Fourth stage) (Fourth stage) A- A & -B Fig. B Fie. 1