CN104294805B - Semi cylindrical type surge-chamber - Google Patents
Semi cylindrical type surge-chamber Download PDFInfo
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- CN104294805B CN104294805B CN201410568215.3A CN201410568215A CN104294805B CN 104294805 B CN104294805 B CN 104294805B CN 201410568215 A CN201410568215 A CN 201410568215A CN 104294805 B CN104294805 B CN 104294805B
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- barrel
- chamber
- surge
- gate
- tunnel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of semi cylindrical type surge-chamber, it is arranged on above diversion tunnel or tailrace tunnel, near main building place, including the barrel with dome, described barrel cross section is the composite figure that three limits and the arc of rectangle surrounds, it is provided with impedance plate bottom described barrel, described barrel bottom-resistive plate has the impedance hole for connecting diversion tunnel or tailrace tunnel, several gate shafts it are provided with in described barrel, described gate shaft is provided with for blocking diversion tunnel or the gate of tailrace tunnel current, described gate shaft extends to barrel top from bottom to top, described barrel top is additionally provided with operating gate gallery, described operating gate gallery is perpendicular to barrel and communicates with barrel.Semi cylindrical type surge-chamber can better adapt to the geological conditions of complexity, is conducive to stablizing of surrounding rock of chamber, and surge-chamber arc liner structure possesses good stress condition.
Description
Technical field
The present invention relates to power station pressure regulation facility, concrete finger one semi cylindrical type surge-chamber.
Background technology
Surge-chamber is a kind of pressure regulation facility the most commonly used in power station.Near Factory Building, position that topographic and geologic condition is more suitable, the surge-chamber being connected and having bigger table with pressure conduit is set, reduce the fluid inertia acceleration time, make surge wave, at the surge-chamber water surface, reflection fully occur, reach to reduce the purpose of water hammer experiment, improve the hydraulic turbine service condition when load variations and system power supply quality.
When Hydraulic unit at water-carriage system is two machine one holes or multimachine one hole, barrel structural shape many employings circular cross section of surge-chamber and rectangular cross section, it is called cylinder type surge-chamber and gallery type surge-chamber.
Cylinder type surge-chamber, according to whether unit maintenance gate is placed in surge-chamber, can there is following two arrangement: the built-in surge-chamber scheme of gate as shown in figure 16, unit maintenance gate is arranged in surge-chamber, at this moment independent access tunnel 13 need to be set at surge-chamber upstream side, communicated with each operating gate platform by communicating branch hole, the requirement diagonally disposed to adapt to tail lock；The external surge-chamber scheme of gate as shown in figure 17, by arranged apart to unit maintenance gate and down stream surge-chamber, be located at the upstream side of down stream surge-chamber, arrange independent bulkhead gate vertical shaft 14 and operating gate gallery 15.Practical Project is likely to be due to the restriction of geological conditions, there is no enough spaces to meet main building, main transformer hole, the layout of the three large caverns groups such as surge-chamber, the rock stratum distribution meeting large underground hole group arrangement requirement is extremely limited, in this case according to cylinder type surge-chamber pattern, need to be separately provided access tunnel and communicating branch hole, or gate shaft and operating gate gallery, in order to ensure the stability of surrounding rock of chamber, the distance of surge-chamber and main building will be increased, it is directly entered soft stratum by making surge-chamber or there is the rock stratum of matter defect significantly, it is difficult to meet cavitation condition and the adjoining rock stability requirement of the huge cavern of high side wall, very big potential safety hazard is all there is in construction time and runtime.
As shown in figure 18, gallery type surge-chamber, it is arranged in surge-chamber by unit maintenance gate shaft upstream side, the arrangement in " one " font, be conducive to gate and the layout of opening and closing device, operation and share.When the restriction by geological conditions, as shown in figure 19, the minimum safe distance 16 of surge-chamber downstream abutment wall 12 and soft stratum demarcation line 17 it cannot be guaranteed that time, it is difficult to meet huge Stability of Excavation Surrounding requirement, adopt engineering treatment difficulty bigger, cost is significantly high, and considers that the impact of soft rock long-term creep, surrounding rock of chamber and liner structure all exist potential safety hazard.
Accordingly, it would be desirable to reasonable design surge-chamber structure, evade large span, the large-scale surge-chamber of high side wall exists the security risk of Stability of Excavation Surrounding and liner structure in construction time and runtime.
Summary of the invention
Present invention aim to the arrangement requirement overcoming gallery type surge-chamber and cylinder type surge-chamber can not meet complex geological condition, it is provided that the semi cylindrical type surge-chamber of a kind of engineering geological condition that can better adapt to complexity, and simple and stable structure is good.
For achieving the above object, semi cylindrical type surge-chamber designed by the present invention, it is arranged on above diversion tunnel or tailrace tunnel, near main building place, it is characterized in that and includes the barrel with dome, described barrel cross section is the composite figure that three limits and the arc of rectangle surrounds, wherein the string of arc limit long with the one of rectangle overlaps, it is provided with impedance plate bottom described barrel, described impedance plate is provided with the impedance hole for connecting diversion tunnel or tailrace tunnel, several gate shafts it are provided with in described barrel, consistent with the Hydraulic unit layout pattern of water-carriage system, described gate shaft is provided with for blocking diversion tunnel or the gate of tailrace tunnel current, described gate shaft extends to barrel top from bottom to top, described barrel top is additionally provided with operating gate gallery, described operating gate gallery is perpendicular to barrel and communicates with barrel.
Further, described arc is semi arch, has the stress condition of good stability of tunnel and liner structure while meeting area of surge tank.
Further, described arc is the central angle circular arc less than 180 °.According to MODEL OVER COMPLEX TOPOGRAPHY, there is while meeting area of surge tank the stress condition of good stability of tunnel and liner structure.
Yet further, described arc is the central angle circular arc more than 180 °.According to MODEL OVER COMPLEX TOPOGRAPHY, there is while meeting area of surge tank the stress condition of good stability of tunnel and liner structure.
Yet further, described arc is half elliptic, reduces, meeting while area of surge tank requires, the span that surge-chamber flows to downstream, is conducive to stablizing of surrounding rock of chamber.
Yet further, described gate shaft is arranged on the rectangular side of barrel.The side wall place at rectangular edges place arranges gate shaft and is more conducive to the layout of gate and opening and closing device and shares, it is simple to the layout of traffic aisle and the unified management of operational outfit.
Yet further, described barrel is arranged on above the bifurcated pipe section of diversion tunnel or tailrace tunnel.Surge-chamber is unified with bifurcated pipe section to be arranged, it is to avoid the bifurcated pipe section of large span enters soft stratum or there is the rock stratum of matter defect significantly.
The present invention compared with prior art, has an advantage in that and surge-chamber is arranged in the position that distance main building is nearer, it is possible to more effectively play the function of surge-chamber.And unit maintenance gate is arranged in surge-chamber, the arrangement in " one " font, it is simple to the layout of bulkhead gate and opening and closing device, shared and operational management between multiple surge-chambers；The barrel in the combined cross section of the present invention adds dome, non-for barrel bulkhead gate side is adopted arc-shaped sections, to better adapt to the geological conditions of complexity, and the barrel in combined cross section is conducive to stablizing of surrounding rock of chamber, and arc liner structure possesses good stress condition.
Accompanying drawing explanation
Fig. 1 is a kind of semi cylindrical type downstream surge-chamber structure schematic diagram.
Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1.
Fig. 3 is the B-B sectional structure schematic diagram of Fig. 1.
Fig. 4 is I-I sectional structure schematic diagram of Fig. 1.
Fig. 5 is II-II sectional structure schematic diagram of Fig. 1.
Fig. 6 is III-III sectional structure schematic diagram of Fig. 1.
Fig. 7 is II-II sectional structure schematic diagram that Fig. 1 bifurcated pipe is arranged apart with surge-chamber.
Fig. 8 is for adopting semiellipse type surge-chamber structure schematic diagram.
Fig. 9 is II-II sectional structure schematic diagram that in Fig. 1, barrel cross section increases rectangular section area.
Figure 10 is II-II sectional structure schematic diagram that in Fig. 1, barrel cross section increases semicircle diameter.
Figure 11 is II-II sectional structure schematic diagram that in Fig. 1, barrel cross section strengthens circular arc central angle.
Figure 12 is that in Fig. 1, barrel cross section increases rectangular section area and II-II sectional structure schematic diagram of semicircle diameter simultaneously.
Figure 13 is that in Fig. 1, barrel cross section adopts half elliptic II-II sectional structure schematic diagram.
Figure 14 is II-II sectional structure schematic diagram that in Fig. 1, barrel cross section reduces circular arc central angle.
Figure 15 is II-II sectional structure schematic diagram that in Fig. 1, barrel cross section reduces circular arc central angle and diameter.
Figure 16 is the cylinder type surge-chamber structure schematic diagram that gate is built-in.
Figure 17 is the cylinder type surge-chamber structure schematic diagram that gate is external.
Figure 18 is the structural representation of gallery type surge-chamber.
Figure 19 is for adopting gallery type surge-chamber power station horizontal layout schematic diagram.
Figure 20 is for adopting semi cylindrical type surge-chamber power station horizontal layout schematic diagram.
Wherein: gate 1, gate shaft 2, upstream abutment wall 3, side wall 4, barrel 5, arc 51, rectangle 52, tail water props up hole 6, impedance plate 7, impedance hole 8, operating gate gallery 9, dome 10, the main hole 11 of tail water, downstream abutment wall 12, access tunnel 13, bulkhead gate vertical shaft 14, operating gate gallery 15, minimum safe distance 16, demarcation line, rock stratum 17, the center of circle 18, central angle 19, bifurcated pipe 20, gallery type surge-chamber 21, semi cylindrical type surge-chamber 22.
Detailed description of the invention
Below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail, and Figure 16～19 have been described in detail in the introduction, are not just repeating here:
Namely semi cylindrical type surge-chamber may be arranged at the tail water discharge in power station, is downstream surge-chamber；It is also disposed at the diversion system in power station, is upstream surge-chamber.In the statement of summary of the invention be arranged in tail water discharge downstream surge-chamber for enonce, when as upstream surge-chamber, it is only necessary to surge-chamber and the layout of base pressure pipeline, indoor maintenance gate and vertical shaft layout etc. are done and adjusts accordingly.
nullSemi cylindrical type downstream surge-chamber as shown in figs. 1 to 6，During for two machine one holes，It is positioned close to the top of the tailrace tunnel bifurcated pipe 20 in main building downstream，Including the barrel 5 with dome 10，Barrel 5 cross section is the composite figure that three limits and the arc 51 of rectangle 52 surrounds，Arc 51 can be circular arc or elliptic arc，It is provided with 2 tail water bottom the barrel 5 upstream abutment wall 3 at place, rectangle 52 3 limit and props up hole 6，It is provided with the main hole 11 of single tail water bottom the barrel 5 downstream abutment wall 12 at arc 51 place，Tail water props up hole 6 place and is provided with unit maintenance gate 1，Gate 1 is arranged in gate shaft 2，Gate shaft 2 extends to barrel 5 top from bottom to top，Barrel 5 top is additionally provided with operating gate gallery 9，Operating gate gallery 9 is perpendicular to barrel 5 and communicates with barrel 5，Impedance plate 7 it is additionally provided with bottom barrel 5，Impedance plate 7 also serves as the top board of tailrace tunnel bifurcated pipe 20 simultaneously.
The purpose of the present invention reaches with measure as follows, as shown in Fig. 1～15:
(1) on the basis of the hinge general layout general layout primarily determined that and underground power station development scheme, the pitch requirements according to geological conditions and Main Underground cavern, primarily determine that the position of surge-chamber；
(2) with reference to the arrangement of gallery type surge-chamber, unit maintenance gate 1 and gate shaft 2 are arranged in surge-chamber, the arrangement in " one " font of each aqueduct upper lock gate well 2, be conducive to gate and the layout of opening and closing device, operation and share；
(3) determine the upstream abutment wall 3 of semi cylindrical type surge-chamber cavern and the position of left and right sides abutment wall 4, need to consider the structural requirement that gate shaft 2 is arranged, and the layout of unit maintenance gate 1 opening and closing device and service requirement；
(4) according to the area of surge tank needed for designing and calculating, take into account the distance of surge-chamber both sides abutment wall 4 to determine the string of barrel arc 51 as far as possible, form the barrel 5 being made up of semi cylindrical type surge-chamber non-gate side arc 51 part together with rectangle 52 part of bulkhead gate side；
(5) when the distance of surge-chamber both sides abutment wall 4 is as the diameter of semi cylindrical type, if now the area of surge-chamber is less than area of surge tank needed for designing and calculating, it is possible to:
1., when geological conditions allows, downstream side increase rectangle 52 area meets the requirement of area of surge tank, sees Fig. 9；
2., when geological conditions allows, only suitably increase the diameter of circular arc 51, see Figure 10；
3., when geological conditions allows, only suitably increase the central angle of circular arc 51, make central angle more than 180 °, see Figure 11；
4. comprehensive employing increases by 52 sections of areas of rectangle and increases the measure of circular arc 51 diameter, sees Figure 12, to obtain good sectional form and size, optimizes steady-state conditions and the stress distribution of surrounding rock of chamber；
5. barrel adopts semiellipse type structure, and namely arc 51 is semiellipse arc, sees Figure 13, while meeting area of surge tank requirement, reduces the span that surge-chamber flows to downstream, is conducive to stablizing of surrounding rock of chamber.
(6) when the distance of surge-chamber both sides abutment wall 4 is as the diameter of semi cylindrical type, if now the area of surge-chamber is more than area of surge tank needed for designing and calculating, it is possible to:
1. the central angle 19 of circular arc 51 is reduced so that it is be slightly less than 180 °, connect with surge-chamber both sides abutment wall 4, see Figure 14；
2. the comprehensive measure adopting central angle 19 and circular arc 51 diameter reducing circular arc 51, is shown in Figure 15, adopts the mode of cylinder tangent line to connect with surge-chamber both sides abutment wall 4.
(7) linking tail water props up the bifurcated pipe 20 in hole 6 and the main hole 11 of tail water, situation according to geological conditions, as shown in Figure 1 and Figure 5, generally can unified with surge-chamber arrange, namely bifurcated pipe 20 is placed in bottom surge-chamber, it is possible to avoid the bifurcated pipe section of large span enter soft stratum or there is the rock stratum of matter defect significantly；As shown in Figure 7, it is possible to arranged apart with surge-chamber, the downstream of surge-chamber it is arranged in, it is possible to reduce the comprehensive height of Large span cavern, be conducive to Stability of Excavation Surrounding；
(8) as shown in Figure 1 and Figure 5, tailwater bifurcation 20 is unified with surge-chamber to be arranged, the top board of bifurcated pipe 20 doubles as the impedance plate 7 of surge-chamber；As it is shown in fig. 7, tailwater bifurcation and surge-chamber are arranged apart, tail water props up the top board in hole 6 and doubles as the impedance plate 7 of surge-chamber.Meanwhile, gate aperture doubles as impedance hole 8, and its orifice area is tentatively drafted according to surge-chamber design specification；
(9) as shown in Figure 8, when the Hydraulic unit arrangement that water-carriage system is multimachine one hole (such as three machine one holes), surge-chamber barrel can adopt semiellipse type structure, to reduce the span that surge-chamber flows to downstream, is conducive to stablizing of surrounding rock of chamber.
(10) determine the elevation of operating gate gallery 9 according to surge-chamber top surge water level, the cross dimensions of gallery meets gate opening/closing, and the layout of opening and closing device and service requirement；Being operated by the mutual UNICOM of gallery between each surge-chamber, gallery end is connected with surge-chamber access tunnel；
(11) surge-chamber top adopts spherical or elliposoidal dome 10, with the barrel section flat of bottom along being connected.
Such as Figure 20, the semi cylindrical type surge-chamber of the employing present invention so that the surge-chamber downstream curved sidewall 51 minimum safe distance 16 from soft rock mass interface 17 disclosure satisfy that huge Stability of Excavation Surrounding requirement, it is ensured that the safety of surrounding rock of chamber and liner structure.
Claims (6)
- null1. a semi cylindrical type surge-chamber，It is arranged on above diversion tunnel or tailrace tunnel，Near main building place，It is characterized in that: include the barrel (5) with dome (10)，Described barrel (5) cross section is the composite figure that three limits and the arc of rectangle surrounds，Described barrel (5) bottom is provided with impedance plate (7)，Described impedance plate (7) is provided with the impedance hole (8) for connecting diversion tunnel or tailrace tunnel，Several gate shafts (2) it are provided with in described barrel (5)，Described gate shaft (2) is arranged on the rectangular side of barrel (5)，The gate (1) for blocking diversion tunnel or tailrace tunnel current it is provided with in described gate shaft (2)，Described gate shaft (2) extends to barrel (5) top from bottom to top，Described barrel (5) top is additionally provided with operating gate gallery (9)，Described operating gate gallery (9) is perpendicular to barrel (5) and communicates with barrel (5).
- 2. semi cylindrical type surge-chamber according to claim 1, it is characterised in that: described arc is semi arch.
- 3. semi cylindrical type surge-chamber according to claim 1, it is characterised in that: described arc is the round angle circular arc less than 180 °.
- 4. semi cylindrical type surge-chamber according to claim 1, it is characterised in that: described arc is the round angle circular arc more than 180 °.
- 5. semi cylindrical type surge-chamber according to claim 1, it is characterised in that: described arc is semiellipse.
- 6. according to the arbitrary described semi cylindrical type surge-chamber of Claims 1 to 5, it is characterised in that: described barrel (5) is arranged on above the bifurcated pipe section of diversion tunnel or tailrace tunnel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410568215.3A CN104294805B (en) | 2014-10-22 | 2014-10-22 | Semi cylindrical type surge-chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410568215.3A CN104294805B (en) | 2014-10-22 | 2014-10-22 | Semi cylindrical type surge-chamber |
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| CN104294805A CN104294805A (en) | 2015-01-21 |
| CN104294805B true CN104294805B (en) | 2016-07-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108755622B (en) * | 2018-07-25 | 2023-05-09 | 中国水利水电第十四工程局有限公司 | Excavation method of large-diameter cylindrical tail water pressure regulating chamber |
| CN111395281A (en) * | 2020-03-20 | 2020-07-10 | 南方电网调峰调频发电有限公司 | Impedance hole connection structure of hydropower engineering dual-machine shared surge shaft |
| CN114032859B (en) * | 2021-11-18 | 2023-03-14 | 中国电建集团成都勘测设计研究院有限公司 | Structure for reducing hydraulic fluctuation of pressure tail water system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201473933U (en) * | 2009-09-08 | 2010-05-19 | 中国水电顾问集团北京勘测设计研究院 | Combination layout structure of tail water emergency gate and tail water surge shaft in pumped storage power station |
| CN203546687U (en) * | 2013-11-14 | 2014-04-16 | 武汉大学 | Hydropower station tail water surge chamber capable of automatically adapting to changes in tail water level |
| CN204151762U (en) * | 2014-10-22 | 2015-02-11 | 长江勘测规划设计研究有限责任公司 | Semi cylindrical type surge-chamber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0684611B2 (en) * | 1989-10-27 | 1994-10-26 | 典夫 竹井 | Method of discharging gravel in a reservoir |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201473933U (en) * | 2009-09-08 | 2010-05-19 | 中国水电顾问集团北京勘测设计研究院 | Combination layout structure of tail water emergency gate and tail water surge shaft in pumped storage power station |
| CN203546687U (en) * | 2013-11-14 | 2014-04-16 | 武汉大学 | Hydropower station tail water surge chamber capable of automatically adapting to changes in tail water level |
| CN204151762U (en) * | 2014-10-22 | 2015-02-11 | 长江勘测规划设计研究有限责任公司 | Semi cylindrical type surge-chamber |
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