CN105155488A - Arrangement mode and structure of small ecological flow unit of hydropower station underground powerhouse - Google Patents

Arrangement mode and structure of small ecological flow unit of hydropower station underground powerhouse Download PDF

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Publication number
CN105155488A
CN105155488A CN201510383961.XA CN201510383961A CN105155488A CN 105155488 A CN105155488 A CN 105155488A CN 201510383961 A CN201510383961 A CN 201510383961A CN 105155488 A CN105155488 A CN 105155488A
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CN
China
Prior art keywords
unit
ecological flow
little unit
riverbed
little
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CN201510383961.XA
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Inventor
周小乾
宁华晚
任兴普
宋静
阮祥明
陈思聪
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PowerChina Guiyang Engineering Corp Ltd
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PowerChina Guiyang Engineering Corp Ltd
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Priority to CN201510383961.XA priority Critical patent/CN105155488A/en
Publication of CN105155488A publication Critical patent/CN105155488A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The invention discloses an arrangement mode and structure of a small ecological flow unit of a hydropower station underground powerhouse. According to the arrangement mode and structure, pressure steel tubes of water diversion lines (1) of a large unit, close to the riverbed side, of an original water diversion and power generation system are perforated and branched for the arrangement of water diversion lines (1) of the small unit. The small ecological flow unit (2) is arranged at the position, where auxiliary powerhouses are arranged originally, of the end, close to the riverbed side, of an underground powerhouse main engine chamber (4). The lower portion of an installation chamber (5) is expanded and excavated, part of the auxiliary powerhouses are moved to the lower portion of the installation chamber (5), and the other part of the auxiliary powerhouses are moved to the side, close to the riverbed, of the small ecological flow unit (2). According to the technical scheme of the arrangement mode and structure, an existing hydraulic structure is fully used, and the coordinative and reasonable arrangement of whole hub buildings is considered, so that huge investment is saved, the economical benefit is remarkable, construction is safe and convenient, and the arrangement mode and structure are worth popularizing.

Description

The little unit arrangement of underground workshop ecological flow and structure
Technical field
The present invention relates to the little unit arrangement of a kind of underground workshop ecological flow and structure, belong to Hydraulic and Hydro-Power Engineering technical field.
Background technology
Current most of underground workshop all makes full use of water resource by arranging an ecological small unit, guarantees that downstream river course continues to flow simultaneously, protection downstream water biology and environmental requirement.If ecological unit underground power house is arranged in addressing separately, needing, clipping room is set in addition, enters drain tunnel, collector drain, enter the attached caverns such as factory's access tunnel, working tunnel, additionally need increase great amount of investment; If directly lengthen draft tube deck, water inlet, main building to set up ecological unit, generating system by piloting water investment also can increase more.In order to investment reduction, the layout of ecological little unit should make full use of existing hydraulic structure as far as possible, and takes into account whole main structures layout and to coordinate, rationally.
Summary of the invention
The object of the invention is the inconvenience arranged for solving the ecological small unit of existing underground workshop, the little unit arrangement of a kind of underground workshop ecological flow and structure are provided.
Technical scheme of the present invention is:
The present invention carries out improving on the basis of existing traditional underground workshop structure, it carries out the layout of the little unit diversion line of ecological flow at original generating system by piloting water by perforate bifurcated on the diversion line penstock of side, riverbed, between underground power house main frame, originally arranged that the little unit of ecological flow was arranged at the position (if do not arrange auxiliary power house section, needing to lengthen main building length) of auxiliary power house by riverbed side end, can guarantee like this ecological flow little unit diversion line and tail water circuit the shortest, set up surge shaft to avoid circuit long.Digged clipping room bottom and Part auxiliary power house is moved to clipping room bottom, another part auxiliary power house moves to the little unit of ecological flow by side, riverbed.At ecological flow little unit upstream side spiral case extension layout butterfly valve to block into water current during at the little unit maintenance of ecological flow or long-time shutdown.The little unit tailwater tunnel outlet of ecological flow connects riverbed tailwater tunnel side wall center, in the middle part of the little unit tailwater tunnel of ecological flow, Draft tube gate is set, and dig formation tail water lock chamber at top collector drain, between tailwater tunnel top board to tail water lock floor, rock mass open interior arranges Draft tube gate gate slot, blocks tail water current during unit maintenance little of ecological flow.Between main building (between containing main frame and clipping room) and main transformer hole, setting up a bus tunnel as having access gallery between original auxiliary power house and main transformer hole, this gallery also can be utilized as the bus tunnel of the little unit of ecological flow.Main transformer hole is lengthened by side, riverbed to arrange the little unit main transformer of ecological flow.
The invention has the beneficial effects as follows:
The layout of the little unit of ecological flow of the present invention should make full use of existing hydraulic structure as far as possible, and take into account whole main structures layout and to coordinate, rationally, ecological flow unit underground power house scheme is arranged in addressing more separately, decrease and need the clipping room of extra layout, enter drain tunnel, collector drain, enter the attached cavern such as factory's access tunnel, working tunnel, clipping room, bridge machine and part satellite equipment thereof etc., save great amount of investment; More directly lengthen draft tube deck, water inlet, main building set up ecological Unit Scheme, decrease the length of draft tube deck, water inlet, diversion pipeline, tailwater tunnel, reduce the investments such as corresponding excavation, supporting, lining cutting, draining; For the underground power house being originally furnished with auxiliary power house section, can avoid increasing main building entire length, reduce the investment such as Rock Crane Rail Support section excavation, supporting, draining that top difficulty is larger; For the underground power house being originally furnished with factory's change access gallery, doublely can do the little unit bus tunnel of ecological flow, reduce the investment such as excavation, supporting, lining cutting, draining of setting up the little unit bus tunnel of ecological flow in addition, generating system by piloting water investment reduces more, remarkable in economical benefits, and construction safety is convenient, is worthy to be popularized.
Accompanying drawing explanation
Tu1Shi plant area hinge layout plan;
Fig. 2 is factory building unit centre longitudinal plan;
Fig. 3 is large-sized unit factory building center drawing in side sectional elevation;
Fig. 4 ecological flow little unit generating system by piloting water section of structure.
The former generating system by piloting water of description of reference numerals: 1-is by side, riverbed large-sized unit diversion line, the little unit of 2-ecological flow, the little unit diversion line of 3-, between 4-main frame, 5-clipping room, the little unit tailwater tunnel of 6-, 7-butterfly valve, 8-is by side, riverbed large-sized unit tailwater tunnel, 9-Draft tube gate, 10-tail water lock chamber, 11-Draft tube gate gate slot, auxiliary power house under 12-clipping room, the little unit of 13-ecological flow is by side, riverbed auxiliary power house, 14-main building, 15-main transformer hole, 16-large-sized unit bus tunnel, the little unit bus tunnel of 17-, 18-outlet vertical shaft, 19-ventilation hole, 20-collector drain, 21-factory becomes access tunnel, 22-draft tube deck.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
First see Fig. 1, main thought of the present invention is like this, on the penstock of former generating system by piloting water by side, riverbed large-sized unit diversion line 1, perforate bifurcated carries out the layout of the little unit diversion line 3 of the little unit of ecological flow 2, like this, 4 are just needed between underground power house main frame originally to arrange that the little unit 2 of ecological flow was arranged at the position (if do not arrange auxiliary power house section, needing to lengthen main building length) of auxiliary power house by riverbed side end, can guarantee like this ecological flow little unit diversion line 3 and tail water circuit the shortest, set up surge shaft to avoid circuit long.
As shown in Figure 3, in order to give the installation headspace of the little unit 2 of ecological flow, just need clipping room 5 bottom is digged and Part auxiliary power house is moved to clipping room 5 bottom, i.e. auxiliary power house 12 under clipping room, another part auxiliary power house moves to the little unit 2 of ecological flow by side, riverbed, and namely the little unit of ecological flow is by side, riverbed auxiliary power house 13.
As shown in Figure 1 and Figure 4, block into water current when arranging butterfly valve 7 in ecological flow little unit 2 upstream side spiral case extension to overhaul at the little unit 2 of ecological flow or to shut down for a long time.As shown in Figure 4, little unit tailwater tunnel 6 outlet connects side, riverbed large-sized unit tailwater tunnel 8 side wall center, in the middle part of little unit tailwater tunnel 6, Draft tube gate 9 is set, and dig formation tail water lock chamber 10 at top collector drain 20, between little unit tailwater tunnel 6 top board to tail water lock chamber 10 base plate, rock mass open interior arranges Draft tube gate gate slot 11, blocks tail water current when overhauling for the little unit 2 of ecological flow.
As shown in Figure 2, main building 14(containing between main frame 4 and clipping room 5) and main transformer hole 15 between set up a large-sized unit bus tunnel 16. as shown in Figure 1, as having access gallery between original auxiliary power house and main transformer hole 15, this gallery also can be utilized as the little unit bus tunnel 17 of ecological flow.Main transformer hole 15 is lengthened by side, riverbed with the main transformer arranging the little unit 2 of ecological flow.
As Figure 1-Figure 4, the present invention implements like this:
During construction: the first step, excavation supporting main building 14(is containing ecological flow unit section), main transformer hole 15(is containing ecological flow main transformer section) if, outlet vertical shaft 18, floor switches station, large-sized unit bus tunnel 16, ecological flow little unit bus tunnel 17(have factory to become access gallery can to share), former generating system by piloting water is by side, riverbed large-sized unit diversion line 1 with by side, riverbed large-sized unit tailwater tunnel 8.
Second step, excavation supporting little unit diversion line 3 and with former generating system by piloting water by large-sized unit diversion line 1 joint, side, riverbed bifurcated pipe section.
3rd step, the little unit tailwater tunnel 6 of excavation supporting ecological flow.
4th step, excavation supporting levels antiseepage collector drain 20.
5th step excavation supporting ecological flow little unit tail water lock chamber 10 and tail water gate slot 11.
6th step, build main building 14, main transformer hole 15 concrete (containing ecological flow unit section), if complete outlet vertical shaft 18, floor switches station, large-sized unit bus tunnel 16, ecological flow little unit bus tunnel 17(have factory to become access gallery can to share), former generating system by piloting water is by side, riverbed large-sized unit diversion line 1 with by lining cutting, draining setting and concretings such as side, riverbed large-sized unit tailwater tunnels 8.
7th step, completes large-sized unit and the little unit penstock of ecological flow installs (containing bifurcated pipe section).
8th step, completes the lining cutting of little unit tailwater tunnel 6, draining is arranged, complete tail water lock chamber 10 and tail water gate slot 11 concreting, draining is arranged.Finally complete large machine unit and the little unit units' installation of ecological flow, the Metal structure installations etc. such as gate.
Embodiment 1:
As Figure 1-4, some hydropower station underground powerhouse is arranged in dam Left Hill Mass, adopts main building 14, main transformer Dong15Liang great cavern parallel arrangement.Plant area's main structures is primarily of main building 14, main transformer hole 15, large-sized unit bus tunnel 16, little unit bus tunnel 17, and outlet vertical shaft 18, ventilation hole 19, collector drain 20, factory become underground chamber and the compositions such as draft tube deck 22, ground type switching station such as access tunnel 21.
Subtract the needs of dehydration section ecology and view flow to meet dam site downstream, according to environmental requirement, arrange a little unit of ecology, installed capacity is 18MW.When the large-sized unit of 3 single-machine capacity 180MW whole out of service time, little unit generation, by 31m 3ecological flow is let out under/s; Have the unnecessary water yield when flood season, large-sized unit is completely sent out to still have and is abandoned water, and little unit also can participate in generating, makes full use of hydraulic power potentials.This power station is unit water channeling type; generating system by piloting water water inlet installation accident rapid door adds access door; 2#, 3# machine is " hole one machine "; the diversion system of 1# machine and 4# machine (the little unit of ecological flow 2) totally one diversion tunnel and tailwater tunnel and the little unit 2 of ecological flow is " pipe two machine " form; and a butterfly valve 7 is installed before ecological flow little unit 2 spiral case, in the middle part of little unit tailwater tunnel 6, Draft tube gate 9 is set.Ecological flow little unit 2 generating system by piloting water is propped up pipeline section and the little unit section of underground power house ecological flow, 4# tailwater tunnel, 1# tailwater tunnel etc. formed by water inlet section, 1# diversion tunnel section, 1# penstock section, bifurcated pipe section, 4# penstock.Whole generating system by piloting water circuit is always about 102.75m.
Ecological little power traction waterpipe intake is connected in the middle part of the large machine penstock of 1#, and by N34 ° of E, through turning radius, to be 40m angle be that the horizontal curved of 30 ° goes to N11 ° of W in conduit axis orientation, and forward enters underground power house.4# penstock internal diameter 2.4m, steel pipe tube wall is 16MnR, and steel plate serves as a contrast thick average out to 32mm, penstock segment length 42.11m, the thick 0.6m of backfill C20 plain concrete, longitudinal grade i=0%.
As shown in Figure 4, little unit tailwater tunnel 6 is gateway opening type, hole inside dimension 3.5m × 4.01m, wherein abutment wall clear height 3.0m, vault clear height 1.01m, and lining concrete is thick is 0.8m.N4 °, the canal axes direction long 60.64m of E, 4# tailwater tunnel.The outlet of 4# tailwater tunnel is right side abutment wall center in the middle part of 1# tailwater tunnel, and its base plate is 494.30m at the elevation of 1# tailwater tunnel abutment wall.In the middle part of the little unit tailwater tunnel 6 of ecological flow, Draft tube gate 9 is set, and dig formation tail water lock chamber 10, wide 5.8m, long 10m at top collector drain 20, height 5.7m, continue excavation 8.2m downwards at tail water lock chamber 10 base plate and arrange inspection platform, wide 5.8m, long 8.3m, between little unit tailwater tunnel 6 top board to inspection platform base plate, rock mass open interior arranges Draft tube gate gate slot 11, wide 3.4m, long 6.7m, high 32.9m block tail water current when overhauling for the little unit 2 of ecological flow.
4# ecological flow little Turbines Installation Elevation 499.00m, unit segment length 22m, unit centre distance upstream abutment wall 11.5m, apart from downstream abutment wall 11.8m.Factory building Arch Excavation elevation 542.80m, draft tube base plate excavation elevation 491.20m, 4 maximum excavation height 51.6m between main frame.Between main frame, 4 are divided into six layers along elevation, and according to the needs of layout of electro-mechanical equipment and structure, each floor height journey is respectively 517.40m, 511.80m, 505.90m, 502.50m, 495.80m and 494.30m.The other dish of the main placement machine of 517.40m layer, governor and oil gear thereof, hang thing hole etc., 511.80m floor mainly arranges that 1 bench-type number is the generating set of SF18-16/360, battery room, factory building direct current cabinet room and hang thing hole etc., mainly arrange turbine oil depot and oil purification room for 505.90 layers, generator neutral point equipment, generator lead-out wire, 10kv switchboard, excitation becomes, technical water supply system equipment Pipe-Line, draft tube drainage for overhaul disc valve and hang thing hole etc., 498.60m layer mainly arranges access gallery, emergency oil pond, butterfly valve and ancillary service thereof, butterfly valve Hydraulic Station, 494.30m layer mainly arranges draft tube elbow, draft tube diffuser etc., draft tube adopts oblique water-out manners, the angle of tubular axis line and main building longitudinal axis is 75 °.
As shown in figures 1 and 3, main building 14 by between main frame 4 and clipping room 5 form, 4 long 135m between main frame, large-sized unit spacing 24.5m, the spacing of little unit and large-sized unit is 19.5m, the above excavation width 25.0m of rock anchorage beam, following excavation width 23.3m, to install three single-machine capacities be a 180MW and single-machine capacity is the ecological little unit of 18MW() turbine-generator units, units' installation elevation 500.90m, Arch Excavation elevation 547m, draft tube base plate excavation elevation large-sized unit is 480.00m, little unit is 493.20m, factory building height overall 67m.The long 45.0m of clipping room 5, wide 23.3m, high 26m.Little unit is positioned at the original position arranging auxiliary power house on the right side of 1# large-sized unit, and long 22m, high 53.8m, upstream side arranges butterfly valve, and auxiliary power house moves to clipping room bottom and digs position.
Clipping room 5 and lower auxiliary power house thereof are divided into five layers along elevation, and according to the needs of layout of electro-mechanical equipment and structure, each floor height journey is respectively 517.40m, 511.80m, 505.90m, 499.50m, 474.50m.517.40m layer is mainly used in units' installation and maintenance, and downstream arranges that one hangs thing hole; It is long × wide that 511.80m layer is of a size of 19.45 × 23.3(), mainly arrange station-service high and low voltage electric distribution room, shared device control room and hang thing hole etc.; It is long × wide that 505.90m layer is of a size of 14 × 23.3(), main layout air compressor machine and downward stair etc.; It is long × wide that 499.50m layer is of a size of 14 × 21.3(), main layout drainage for overhaul pump and seepage drainage pump etc.; 474.50m layer arranges maintenance collecting well and seepage collecting well etc.
As shown in Figure 1, main transformer hole 15 is positioned at 40.0m place, main building 14 downstream, is arranged in parallel with main building 14, long 83.4m, increases 7m, excavation width 15.3m, high 16.2m when more not arranging the little unit 2 of ecological flow.1 ~ 3# machine bus tunnel is between main building 14 and main transformer hole 15, and totally three, long 40.0m, excavated section size 7.5m × 7.8m(are wide × high).4# machine bus tunnel utilizes access gallery between original main building 14 and main transformer hole 15, and excavated section size 4m × 4.5m(is wide × high).High voltage cable passes through outlet vertical shaft to ground G IS switching station from main transformer hole 15.
The little unit of aforementioned ecological flow and former large-sized unit factory building share antiseepage drainage system, air intake/outtake system, enter factory's traffic, clipping room, bridge machine and part satellite equipment and working tunnel system etc.
Certainly, more than just embody rule example of the present invention, the technical scheme that the present invention also has other embodiment, all employings to be equal to replacement or equivalent transformation to be formed, all drops within protection domain of the presently claimed invention.

Claims (3)

1. the little unit arrangement of underground workshop ecological flow, it is characterized in that: on the penstock of former generating system by piloting water by side, riverbed large-sized unit diversion line (1), perforate bifurcated carries out the layout of little unit diversion line (3), between underground power house main frame, by riverbed side end, (4) arranged that the little unit of ecological flow (2) was arranged at the position of auxiliary power house originally; Digged clipping room (5) bottom and a part of auxiliary power house is moved to clipping room (5) bottom, another part auxiliary power house moves to the little unit of ecological flow (2) by side, riverbed.
2. the little unit arrangement of underground workshop ecological flow according to claim 1, it is characterized in that: little unit tailwater tunnel (6) outlet connects the side wall center of side, riverbed large-sized unit tailwater tunnel (8), at little unit tailwater tunnel (6) middle part, Draft tube gate (9) is set, and dig formation tail water lock chamber (10) at top collector drain (20), between little unit tailwater tunnel (6) top board to tail water lock chamber (10) base plate, rock mass open interior arranges Draft tube gate gate slot (11), tail water current are blocked when overhauling for the little unit of ecological flow (2), between main building (14) and main transformer hole (15), set up a large-sized unit bus tunnel (16), main transformer hole (15) are lengthened to arrange the little unit main transformer of ecological flow by side, riverbed.
3. the little unit arrangement of underground power house ecological flow, it is characterized in that: it comprises little unit diversion line (3) and the little unit of ecological flow (2), its suffer small set diversion line (3) is arranged in former generating system by piloting water by perforate crotch on the penstock of side, riverbed large-sized unit diversion line (1), and the little unit of ecological flow (2) is arranged in (4) between underground power house main frame and originally arranged the position of auxiliary power house by riverbed side end; Little unit tailwater tunnel (6) outlet connects the side wall center of side, riverbed large-sized unit tailwater tunnel (8), arranges Draft tube gate (9) at little unit tailwater tunnel (6) middle part.
CN201510383961.XA 2015-07-03 2015-07-03 Arrangement mode and structure of small ecological flow unit of hydropower station underground powerhouse Pending CN105155488A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106958236A (en) * 2017-05-24 2017-07-18 中国电建集团中南勘测设计研究院有限公司 A kind of power station ground power house tailrace outlet structure and its power station

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Application publication date: 20151216