Hydraulic accumulating power station with underground location of lower pool and combined method of lower pool tunnelling

FIELD: construction.

SUBSTANCE: hydraulic accumulating power station comprises a pool located on earth surface, a water intake facility, a vertical discharge water duct, a communication shaft, an aeration shaft, an inclined shaft of power delivery, a station unit with hydraulic units, a lower pool with main chambers and an inclined transport tunnel. The lower pool additionally contains short tunnels, connecting galleries, discharge connecting water ducts and a distributing chamber. Main chambers of the lower pool are made in the form of helically arranged tunnels in plan. The station unit with hydraulic units is placed in the centre of spirals of the lower pool. Hydraulic units of the station unit by means of suction pipes and short tunnels are connected with the distributing chamber, which by means of discharge connecting water ducts arranged radially relative to it, is connected with the main chambers of the lower pool. The lower pool is tunnelled by a combined method consisting in tunnelling of the main inclined transport tunnel from the surface to underground facilities with the help of a tunnelling mechanised complex and arrangement of main chambers of the lower pool. At the same time in parallel to the main inclined tunnel an additional transport tunnel is arranged, and then the lower pool is arranged, which is a continuation of transport tunnels. The lower pool is arranged in two stages: at the first stage a pilot mine is tunnelled with an open tunnelling mechanised complex, and at the second stage, using blast-hole drilling, it is finalised to design contour. Simultaneously with tunnelling of the main chambers of the lower pool they arrange a station unit with hydraulic units, which is located in the centre of spirals of the lower pool.

EFFECT: invention makes it possible to solve a problem of placement of high-discharge hydraulic accumulating power plants in plain territories, by arrangement of a lower pool and a discharge station unit under earth at depths from 300 m to 2000 m, and to optimise works performance and to mechanise tunnelling of underground mines to the maximum, through joint usage of open production tunnelling mechanised complexes and up-to-date equipment complex for performance of blast-hole drilling.

4 dwg

 

The invention relates to the field of hydraulic engineering construction, in particular to the construction of the high-pressure pump storage power plants with underground location of the bottom of the pool.

High-pressure pumped from the underground pool is an environmentally friendly, highly manoeuvrable electric object capable of providing a comprehensive system of service: General primary, automatic secondary and tertiary regulation power, consumer-controlled load and synchronous compensator, prevention of emergency situations, the output of the power systems of accidents and other PSP differs from other energy sources your accommodation right in the centre of consumption, which allows with minimal loss of power to respond quickly to changing electrical loads. Moreover accommodation is pumped from the underground location of the lower basin on the plains, where topographic conditions impossible to build high-PSPP and where, as a rule, are major consumers of electricity.

The closest in technical essence and the achieved technical result is a hydroelectric power plant with an underground location of the bottom of the pool that contains the pool, located on the earth's surface, water is bornoe construction vertical penstock, mine communication, aeration shaft, an inclined shaft of the power distribution, station node units, the bottom of the pool with the main chambers and inclined transport tunnel and the method of penetration of the lower basin includes the driving of the main inclined transport tunnel from the surface to underground structures using channelerotica mechanized complex and the construction of the main chambers of the lower basin. (EN 2005128637, CL E02B 9/00, published. 20.03.2007,).

Disadvantages technical solution is that the issuance of the breed is conducted either by pipeline or by using electrified rail transport over the entire length of the bottom of the pool, which substantially extends the length of the path of the issuance of waste rock. Also in this arrangement, provided that each unit is connected with its isolated sections of the spiral, which necessitates the arrangement of the individual aeration mine for each Autonomous sections of the spiral. With this design substantially elongate draft tube units, and also there may be significant fluctuations in the waters of the lower pool, which increases the risks of collapse of the arch of the cameras.

The technical result from the use of the invention is that it allows to solve the problem of placing the high-pressure GaAsN the plains, by placing the bottom of the basin and the discharge station site under the ground at depths from 300 m to 2000 m, and also allows you to optimize the work and as much as possible to mechanize the driving of underground workings by sharing open productive channelerotica mechanized complexes (grippernye TBM) and modern complex equipment to perform blasting.

This technical result is achieved by the fact that the pumped storage plant with underground location of the bottom of the pool that contains the pool, located on the earth's surface, water intake structure, vertical penstock, mine communication, aeration shaft, an inclined shaft of the power distribution, station node units, the bottom of the pool with the main chambers and inclined transport tunnel, the bottom of the pool has an additional short tunnels, connecting galleries, pressure connecting conduits and distribution chamber, the main chamber the bottom of the pool is made in the form of a spiral tunnels located in the plan, and the station site with the units placed in the center of the spirals of the bottom of the pool and the hydroelectric station node through the suction pipe and short tunnels connected to a distribution chamber, which pressure through the connecting conduits placed radially relative to what it connected with the main chambers of the lower basin, and a combined method of penetration of the lower basin, including the sinking of the main inclined transport tunnel from the surface to underground structures using channelerotica mechanized complex and the construction of the main chambers of the lower basin, in parallel with the main inclined tunnel are additional transport tunnel and then carry out the construction of the lower basin, which is a continuation of the tunnels, the construction of the lower basin are in two stages: the first stage of pilot production open channelerotica mechanized complex, and at the second stage are revision to the design contour of the drilling and blasting method, and simultaneously with the driving of the main chambers of the lower pool build station site by generating units that are located in the center of the spirals of the bottom of the pool.

The invention is illustrated by drawings, where figure 1 shows a plan of the underground complex structures, figure 2 - cross section of the bottom of the pool along b-B in figure 3 - Transverse section of the PSP with the underground bottom pool a-a and figure 4 - Section of the station site along a-A.

Part of the PSP with the underground bottom pool, we construct a combined method according to the invention includes: top the pool 1, located on the earth's surface, the recipient 2, penstock 3, station node with 4 units, distributing chamber 5, the pressure connecting conduits 6, the main camera of the lower basin 7, the inclined shaft of the power distribution 8, the main inclined transport tunnel 9, the communication shaft 10, aeration shaft 11, a short tunnel 12, the connecting gallery 13.

The main camera of the lower basin 7 is made in the form of a spiral tunnels located in the plan. Spiral tunnels are a continuation of the main inclined transport tunnel 9 and the inclined shaft of the power distribution 8 used as the second inclined transport tunnel, which provide access to the depth of the main chambers of the lower basin. Station site with hydro unit 4 is located in the centre of the spirals of the lower basin. With this arrangement, the station site provides the most favorable hydraulic regime in the downstream, as it provided the emptying and filling of the main chambers of the lower basin 7 sectors. The hydroelectric station node 4 through the suction pipe and short tunnels 12 is connected to a distribution chamber 5, which serves for the distribution of fluids and reduce fluctuations in water levels in the main chambers of the lower basin 7. Raspredelitel the I chamber 5 by means of radial pressure of the connecting conduits 6 are connected with the main chambers of the lower basin 7. Pressure connecting conduits are radially from the distribution chamber 5 to ensure the discharge of water by sector of the main chambers of the lower basin 7. The main camera of the lower basin 7 are connected to each other by means of a connecting galleries 13. The connecting gallery 13 and the pressure connecting conduits 6 allow to redistribute the issuance of the breed in the construction period, thereby reducing the length of the issuance of the breed through the pipeline, and also to increase the number of faces. Aeration shaft 11, serves to return and air supply when filling and emptying the bottom of the pool. As the main camera of the lower basin are in free-flow mode, you only need one aeration mine. Communication the shaft 10 is required for delivery of personnel and small cargo, ventilation and aeration and gaskets communication links.

Described PSP works as follows. In the turbine mode, water from the upper basin 1 through a water body 2 is fed to the pressure conduit 3, through which water is supplied to the hydroelectric station node 4. Using hydroelectric energy of the flow is converted into electricity and is thrown into the grid through an inclined shaft of the power distribution 8. Having an aggregate area, water flows through the suction pipe and short tunnels 12 in the distributor Cam is ru 5, where extinguished major fluctuations. Through pressure connecting conduits 6 water enters the main chamber of the lower basin 7 sectors, where the used amount of water is accumulated. The main camera of the lower basin 7 are connected to each other by means of a connecting galleries 13. In pumping water from the main chambers of the lower basin 7 by means of hydraulic cylinders 4 is pumped into the upper pool 1, going way back. Thus, the main chamber of the lower basin 7 are emptied and again ready for a new cycle of generation.

The method of construction of the lower basin hydroelectric power station is as follows.

The lower pool pumped storage plant construct a combined method of penetration, namely, the driving of the main chambers of the lower basin is carried out in two stages: the first stage mechanized create pilot production using open channelerotica mechanical complex (grippernye TBM), and the second stage are revision to the design contour of the drilling and blasting method in solid rocks. The tunnels are in the form of spirally arranged openings in the plan. Spirals are a continuation of the main inclined transport tunnel 9 and the inclined shaft of the power distribution 8, which is used as the second nuklon the th transport tunnel. Tunnels 8 and 9 provide access to the depth of the main chambers of the lower basin. Inclined transport tunnels, made in the form of a spiral, make the approach to develop vertical shafts - pressure conduit 3, the communication shaft 10, aeration shaft 11, which will accelerate the penetration of these mines.

The main inclined transport tunnel 9 from the surface to the underground facilities are using channelerotica mechanized complex. The tunnel are spiral in plan and in cross section has the shape of a circle. The slope of the tunnel, pick up the condition of technical features of the vehicles that provide removal of rocks and equipment to the surface from a depth - cars, conveyors, rail transport. The diameter of the cross section can vary from 6 m to 19 m, and is selected depending on the conditions of transportation of heavy, oversized equipment and geological conditions - increasing the diameter TBM increase the risks of wood thrown out and caving in the tunnel, and economic considerations - consideration of additional fastening and the possible use of TBM in the future, when the sinking of the main chambers of the lower basin. Transport tunnel can take place both in soft and rocky soil, and the lower pool and station site are in rugged rocky soil. One is temporarily with the main inclined transport tunnel are the second inclined transport tunnel a smaller cross-section (diameter of 6 m to 9 m) in parallel with the main in order to accelerate the construction of the bottom of the pool and station site and improve conditions and safety at work and during operation at great depths. The second inclined transport tunnel provides a reliable transport service construction and operation of pumped-storage power plants in General, as well as later in this tunnel arrange an inclined shaft of the power distribution 8 that allows you to refuse the construction of additional vertical shaft.

After the construction of the tunnels immediately begin the construction of the lower basin, which is a continuation of the transport tunnels. The development of the lower basin are in two stages. At the first stage grippernye TBM circular cross-section at the same time lead the development of the upper tier of the main chambers of the lower basin. The diameter of the TBM shall be chosen in the range from 6 m to 19 m, depending on the effective capacity of the lower basin, geological conditions and economic feasibility, namely:

- increasing the diameter TBM decreases the length of the bottom of the basin and, on the contrary, when reducing the diameter increases, the length of the bottom of the pool;

- increasing the diameter TBM increases the risk of cave-ins and wood thrown, which requires additional costs on the mount. With decreasing diameter, on the contrary, the risk of wood thrown and falling decreases;

- you want techno-economic comparison for the distribution of the optimal diameter TBM, on the basis of the cost of securing and increasing the length of the bottom of the pool.

The radius of the spirals of the lower pool is determined from the condition of the issuance of waste rock and capabilities TBM, i.e. a possible turning radius TBM and possible turning radius conveyor belt for reliable and trouble-free operation. Choice of mounting design code is determined from geological conditions and economic feasibility, i.e. when drilling the bottom of the pool in intact rocky soil requires a minimum lining in the form of anchors and spraying concrete on the grid, and in a weak fractured rocks requires an additional lining of the chambers of the lower basin that leads to higher prices. The resulting sinking workings are the upper tier of the main chambers of the bottom of the pool.

Then in the second stage performs the finalization of these workings to the design contour of the drilling and blasting method (method ledge produce loosening rocks with contour blowing). This method of construction of the main chambers of the lower basin 7 allows you to increase the size of the useful cross-section from 1.5 to 3 times, thereby reducing the overall length of the workings of the main chambers of the lower basin. This approach to the development of the main chambers of the bottom of the pool allows you to choose for sinking grippernye TBM relatively small diameters (from 6 m to 10 m), odesew the Yaya project and reducing the likelihood of collapse of the arch cameras with sinking grippernye TBM large diameter (from 10 m to 19 m). Moreover in this case, the improved hydraulic mode when emptying the main chambers of the lower basin (PSPP is running in pump mode) by executing their bottom with a slope. The main camera of the lower basin are in free-flow mode.

As the shape and dimensions of the cross section of the main chambers of the lower basin are determined from the conditions of the location of the bottom of the basin: with increasing depth, the vertical stress in the rock mass increase, and the horizontal change is not linear. It is necessary to optimize the form of development, which in turn also depends on the technology penetrations and mounting hardware.

Section parameters (size and shape) of manufacture and design lining the main chambers of the lower basin in the rock mass is determined on the basis of the calculations. The calculation involves the determination of the stress-strain state (SSS) of the rock mass at the location of these underground workings. Calculation of VAT rock massif is performed by the finite element method. In this method, for the given parameters generate adjacent the array is broken down into separate elements (finite elements) in which with the help of modern computer programs determine the voltage and displacement.

Proceeding from the above, when combined method penetrations who is implemented to find the optimal configuration section of the main chambers of the lower basin taking into account the stress-strain state of rock massif at depths from 300 m to 2000 m, technology penetrations and mounting hardware.

During the excavation of the lower basin also are sinking radial pressure of the connecting conduits 6 and the distribution chamber 5. Pressure connecting conduits 6 are bred in the radial direction from the distribution chamber 5 to the main chambers of the lower basin 7, thereby to provide a favorable hydraulic regime of the power station. When this pressure connecting conduits during the development of the main chambers of the lower basin mechanized and drilling and blasting method are auxiliary transport workings for removal of waste rock. This allows to increase the number of faces at penetration and thus reduce the construction period. Distributing chamber 5 serves for the distribution of fluids and reduce fluctuations in water levels in the main chambers of the lower basin, thus distributing chamber 5 acts as a surge tank.

Simultaneously with the driving of the main chambers of the lower basin 7 construct the station site with units 4, which are located in the center of the spirals of the lower basin. With this arrangement, the station site provides the most favorable hydraulic regime in the downstream, as it provided the emptying and filling of the main chambers of the lower bass is in by sector. Just build the suction pipe hydroelectric turbine hall, power station, short tunnels 12, which connect with the distribution chamber 5, the pressure conduit 3 and aeration shaft 11, which serves to return and air supply when filling and emptying the bottom of the pool. Because the lower pool is in the pressure mode, you only need one aeration mine. Communication the shaft 10, is required in the operational period for the delivery of personnel and small cargo, ventilation and aeration and gaskets communication is built simultaneously with the main structures of the underground complex.

The application of these decisions on the arrangement of the lower basin in comparison with all known configurations of PSPP and methods of their construction provide:

- ability to reduce construction time due to the continuous maintenance of underground work with the joint use of open high-performance channelerotica mechanized complexes and modern machinery to perform drilling and blasting operations;

- ability to use grippernye TBM small diameters (from 6 m to 10 m);

- the choice of the optimal configuration section of the main chambers of the lower basin from the point of view of improving the hydraulic regime in the downstream by the mouth of the STS required slope of the bottom and the stress-strain state at depths from 300 m to 2000 m

1. Pumped storage power plant with an underground location of the bottom of the pool that contains the pool, located on the earth's surface, water intake structure, vertical penstock, mine communication, aeration shaft, an inclined shaft of the power distribution, station node units, the bottom of the pool with the main chambers and inclined transport tunnel, characterized in that the lower pool has an additional short tunnels, connecting galleries, pressure connecting conduits and distribution chamber, the main chamber the bottom of the pool is made in the form of a spiral tunnels located in the plan, and the station site with the units placed in the center of the spirals of the lower basin, and the hydroelectric station node through the suction pipe and short tunnels connected to a distribution chamber, which pressure through the connecting conduits placed radially in relation to it, is connected with the main camera the bottom of the pool.

2. A combined method of penetration of the lower basin, including the sinking of the main inclined transport tunnel from the surface to underground structures using channelerotica mechanized complex and the construction of the main chambers of the lower basin, characterized in that parallel the main part inclined tunnel are additional transport tunnel and then carry out the construction of the lower basin, which is a continuation of the tunnels, the construction of the lower basin are in two stages: the first stage of pilot production open channelerotica mechanized complex, and at the second stage are revision to the design contour of the drilling and blasting method, and simultaneously with the driving of the main chambers of the lower basin construct the station site by generating units that are located in the center of the spirals of the lower basin.



 

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3 cl, 12 dwg

FIELD: hydraulic engineering; fish protective facilities.

SUBSTANCE: invention is designed to draw off young fish from zone of influence of water diversion front. Method comes to ejecting young fish into intake part of ejecting plant from section of pond with higher concentration of young fish, creating active ejecting working stream in mixing chamber by entraining volume of water containing young fish into stream created by central ejecting hydraulic jet and further conveyance of water-fish mixture along pressure conduit into fish outlet. At the last stage of conveyance young fish is transported into fish outlet under no pressure conditions by forming hydraulic jet angle to trough of fish outlet, young fish being dropped on surface of fish outlet stream. Invention provides effective conditions for drawing off young fish into fish outlet and reduces damage to young fish. If working ejecting stream is preliminarily saturated with atmospheric air, its outer borders are saturated with air in form of finest microbubbles which form boundary layer ("air cushion") at contact with which young fish do not suffer from discomfort and easily take up hydrodynamic pressure built in mixing chamber. Moreover, provision of boundary layer saturated with microbubbles of air makes it possible to considerably reduce value of friction coupling of two streams, main getting from working nozzle and ejecting, containing young fish.

EFFECT: provision of good conditions for letting out young fish into fish outlet, reduced damage of young fish.

7 cl, 7 dwg

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to devices protecting young fish and preventing their getting into diversion facility. Proposed fish protective facility includes filtering water-separating dam made in form of vertical water-separating wall arranged along water intake channel and separating inlet part of channel from water conduit, device for preliminary drawing off young fish made in form of vertical rod installed for rotation by drive arranged before water-separating wall from its end face part pointed opposite to water flow. Rod is displaced relative to water-separating wall towards water intake channel. Device for preliminary drawing off young fish is furnished with additional means to increase fish draw-off effect, said means being made in from of flat round disks rigidly secured in height of rod coaxially with rod. Disks are installed parallel to each other forming slot water intake channels. End face part of water-separating wall adjoining the rod is provided with slots located opposite to planes of arrangement of disks. Disks are installed for free passing relative to slots. Invention provides higher efficiency of drawing off young fish out limits of zone of influence of diversion facility owing to provision of disks considerably increasing area of contact with surrounding medium and creating powerful circulation flow providing diversion of young fish and trash entrained by water behind outer surface of dam.

EFFECT: provision of effective conditions for drawing off young fish out of limits of zone of influence of diversion facility.

15 cl, 16 dwg

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to fish protective facilities used in diversion facilities. Proposed fish protective facility includes vertical gauze shield installed in inlet part of water intake channel at angle to its longitudinal axis, fish outlet arranged in place of mating of shield with side of channel, and device for creating whirlpool current for washing the shield containing jet guide member and made in form of chambers adjoining outer surface of shield and forming water intake holes over entire depth of water intake channel. Chambers are made cylindrical being formed by surface of shield and jet guide member and are placed in communication through water intake holes formed by edges of shield of adjacent chambers and edges of jet guide members at place of their butt joining. Each chamber is provided with independent fish outlet made in form of vertical perforated pipe arranged coaxially to chamber and communicating by independent fish duct with fish outlet. Inlet part of water intake channel is made with tangential inlet, edge of left side of channel, shield and tangential inlet are arranged in one plane.

EFFECT: improved efficiency of washing of gauze shield and drawing off young fish and trash.

24 cl, 18 dwg

FIELD: hydraulic and hydropower engineering, particularly for building water-retaining structures to provide power supply to small settlements and farms.

SUBSTANCE: method involves assembling flexible apron assembly consisted of flexible floor apron and flexible downstream apron in watercourse; securing thereof to watercourse bottom by anchors. Water outlet assembly including hydroelectric generator arranged inside it is secured to floor apron and downstream apron by rigid ties. Connected to water outlet assembly by ties are water retaining shell and rope system secured to anchor poles located on watercourse bank.

EFFECT: reduced time of structure assembling and costs for electric power generation.

2 dwg

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