CN109667248A - A kind of multistage water blocking blowdown system for high dam engineering - Google Patents
A kind of multistage water blocking blowdown system for high dam engineering Download PDFInfo
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- CN109667248A CN109667248A CN201811570453.2A CN201811570453A CN109667248A CN 109667248 A CN109667248 A CN 109667248A CN 201811570453 A CN201811570453 A CN 201811570453A CN 109667248 A CN109667248 A CN 109667248A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/04—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of multistage water blocking blowdown systems for high dam engineering, including the water blocking unit being sequentially arranged along flow direction in tunnel, discharge water unit, water blocking unit is arranged by n grades of backwater gate devices according to appropriate spacing, the unit that discharges water includes emergency gate device and outlet gate device, n grades of backwater gate devices of water blocking unit include the maintenance lock well being arranged in juxtaposition in tunnel and work lock well, equalizing pipe be arranged in juxtaposition on the outside of lock wells at different levels and respectively with all maintenance lock wells, work the connection of lock well, equalizing pipe is relative to tunnel floor height lower than height of water level in the last one lock well.Using technical solution of the present invention, reduce water level in lock well step by step, and the relative water pressure of each backwater gate device is made to keep stablizing, the resultant force for bearing gate is in the maximum magnitude that metal structure is able to bear, realize the ability for being vented to any depth, meanwhile by the way that the devices such as blowdown pipe and spilling water gallery are arranged, the safe operation of blowdown system ensure that.
Description
Technical field
Present invention relates particularly to hydraulic and hydroelectric engineering technical field more particularly to a kind of multistage water blocking for high dam engineering
Blowdown system.
Background technique
High dam engineering is that China's socio-economic development brings huge energy benefit, and engineering emptying technology is that it is stablized, is safe
The important leverage of operation.But 300m grades of high dam engineerings of majority can only be vented to by spillway, flood discharging tunnel, emptying tunnel at present
105m or so depth of water, remaining storage capacity water is huge, and hydraulic pressure is very big, is influenced by the strength of materials and metal structure manufacturing process, it is difficult to
Realize deeper emptying.Therefore, it is necessary to invent a kind of technology of adaptation deeper emptying to meet the emptying of current high dam engineering
Operation demand.
For the high dam engineering operation requirement for meeting 300m grades, the Chinese patent of Publication No. CN105220659B discloses one
The big library ultra deep water blocking blowdown system of kind high dam and its operating method.Gross head is shared by the way that flight of locks is arranged, and at different levels
Water-filling offsets water blocking head after gate, and the hydraulic thrust for bearing gates at different levels overcomes metal structure within the scope of conventional design
Professional existing technical problem, but there are still following deficiencies for the structure: snorkel is arranged on the outside of gate shaft, and it is difficult to increase construction
Degree；Equalizing pipe, blowdown pipe, charging pipe setting are complicated, and part lacks stand-by facility, may cause the failure of system concora crush；It is at different levels
Gate system averraged according to head, and chopped-off head gate only shares a part of head, increase quantity and the construction week of gate shaft
Phase.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of multistage water blocking blowdown systems for high dam engineering.
The present invention is achieved by following technical solution.
The present invention provides a kind of multistage water blocking blowdown system for high dam engineering, including water blocking unit, the unit that discharges water,
Concora crush unit and tunnel, the tunnel are connected to water source, and along water (flow) direction within the tunnel, the water blocking unit discharges water
Unit is arranged in juxtaposition on the tunnel according to spacing appropriate, and the water blocking unit includes along water flow within the tunnel
The n grade backwater gate device that direction is arranged in juxtaposition according to appropriate spacing, the unit that discharges water include along water within the tunnel
Stream direction is arranged in juxtaposition emergency gate device and emptying valve system on the tunnel according to appropriate spacing, wherein position
It is to have pressure section A in the upstream tunnel of first order backwater gate device, is located at first order backwater gate device and afterbody water blocking
Tunnel between valve system is to have pressure section B, the tunnel between afterbody backwater gate device and emergency gate device
To there is pressure section C, the tunnel after the emptying valve system is without pressure section, and the backwater gate device includes along described
The maintenance lock well and work lock well that water (flow) direction is successively arranged in juxtaposition within tunnel, the emergency gate device includes emergency lock
Well, the maintenance lock well, work lock well and emergency lock well within be respectively arranged with the maintenance lock that can block or be connected the tunnel
Door, main gate and emergency gate, the concora crush unit include at least two concora crush being arranged in juxtaposition supervisors, every concora crush supervisor
On be connected with the first branch pipe and the second branch pipe, be mounted at least two ball valves and one on first branch pipe and the second branch pipe
A piston valve, wherein first branch pipe is connect with the maintenance lock well, second branch pipe is connect with the work lock well.
Along flow direction within tunnel, stop from the 2nd grade of backwater gate device to last 1 grade of backwater gate device, appoints
It anticipates and is additionally provided with feeding gallery A between adjacent two-stage backwater gate device, one end of feeding gallery A be connected to maintenance lock well, excessive
The other end for flowing gallery A is connected to work lock well.
Along water (flow) direction within the tunnel, the feeding gallery A import setting height is gradually successively decreased, and previous with it
Grade backwater gate device control water level elevation matches.
The cross section outer contour shape of the feeding gallery A is gateway opening type shape.
The work lock well of the afterbody backwater gate device also passes sequentially through feeding gallery B, overflow vertical shaft A, concora crush
Vertical shaft has pressure section C to be connected to described, and feeding gallery B setting height controls water level elevation with the afterbody backwater gate device
Match, concora crush supervisor end is also connected to concora crush vertical shaft.
The overflow vertical shaft A also passes through feeding gallery C with concora crush vertical shaft joint and is connected to described without pressure section.
The cross section outer contour shape of the feeding gallery B is round or gateway opening shape.
The emptying valve system includes the arc lock chamber being connected to the tunnel, is provided within arc lock chamber corresponding
Gates of segmental shape, gates of segmental shape are movably connected or are truncated the tunnel.
The quantity for the first branch pipe being connected to the same maintenance lock well is at least 2, with the same work lock
The quantity of second branch pipe of well connection is at least 2.
Having pressure section A head described in definition is H0, the backwater gate device quantity be n, it is described have pressure section B cross section diameter be
D, it is Δ H that backwater gate devices at different levels, which bear heads, when backwater gate devices at different levels according to etc. hydraulic thrusts principle design when, then
H0, between Δ H, D meet following relationship:
Having pressure section A head described in definition is H0, the backwater gate device quantity be n, it is described have pressure section B cross section diameter be
D, it is H that backwater gate devices at different levels, which bear head,i, wherein i=1,2,3 ..., n, when backwater gate devices at different levels are according to differing
When hydraulic thrust principle designs, then H0、Hi, meet following relationship between D:
H0=H1+H2+...Hn+D。
The tunnel quantity is a plurality of, and each tunnel is respectively arranged in different elevations, wherein within tunnel
Water (flow) direction, between every tunnel on be arranged in juxtaposition that water blocking unit, discharge water unit according to appropriate spacing, the water blocking unit
Including the n grade backwater gate device being arranged in juxtaposition along water (flow) direction within the tunnel according to appropriate spacing, the list that discharges water
Member includes filling along water (flow) direction within the tunnel according to the emergency gate that appropriate spacing is arranged in juxtaposition on the tunnel
Valve system is set and empties, along the sequence of the tunnel elevation from high to low, the water blocking that is included within water blocking units at different levels
The quantity of valve system is incremented by step by step, and defining the tunnel quantity is k, and described on each tunnel to have pressure section A head be Hj,
In, j=1,2 ..., k are described to have pressure section B cross section diameter for D, then Hk, meet any one formula in following relationship between D:
Hj-Hj-1=D.
The tunnel cross section is single gateway opening type shape.
The beneficial effects of the present invention are: technical solution of the present invention is used, for the high dam engineering of 300m or more, in tunnel
Hole bottom is provided with the tunnel that section is gateway opening shape, by the way that multistage backwater gate device is arranged, makes from tunnel upstream
Hydraulic pressure reduce hydraulic pressure step by step, and every grade of backwater gate device is made to keep in balance the reduction of hydraulic pressure effect, to be conducive to subtract
The setting series of backwater gate device, reduces construction work amount in few entire blowdown system, reduces difficulty of construction, saves construction and builds
It is set as this, further, by the way that a plurality of equalizing pipe is arranged, so that each backwater gate device is interconnected, and set on equalizing pipe
It sets multiple valves to be controlled, to make to keep equal to the reduction effect of hydraulic pressure in every grade of backwater gate device as much as possible
Weighing apparatus, and the hydraulic pressure within every grade of backwater gate device can be adjusted by the opening and closing of valve, it is established to be emptied completely head
Good basis, in addition, the water level balance during discharging water unit inspection operation is also ensured, in addition, multistage backwater gate
In device, is used when afterbody backwater gate device is as maintenance, be also configured with corresponding blowdown pipe, tonifying Qi can be passed through
Pipe carries out tonifying Qi into water body, avoids generating the rough sledding such as cavitation, negative pressure.In addition, ensure that and put by setting spilling water gallery
The hydraulic pressure of empty set system backwater gate devices at different levels at runtime does not exceed limit, is conducive to ensure blowdown system safe operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of blowdown system of the present invention；
Fig. 2 is the longitudinal cross-section cross-sectional view of blowdown system of the present invention；
Fig. 3 is the structural scheme of mechanism of the equalizing pipe of blowdown system of the present invention；
When Fig. 4 is that backwater gate device quantity is 1 in blowdown system of the present invention, valve systems at different levels bear head signal
Figure；
When Fig. 5 is that backwater gate device quantity is 2 in blowdown system of the present invention, valve systems at different levels bear head signal
Figure.
In figure: 1- water blocking unit, 2- discharge water unit, 3- concora crush unit, 4- backwater gate device, 5- emergency gate device,
6- empties valve system, 7- main gate, 8- bulkhead gate, 9- feeding gallery A, 10- tunnel, 11- feeding gallery B, 12- overflow
Vertical shaft A, 13- feeding gallery C, 14- emergency gate, 15- arc lock chamber, 16- concora crush vertical shaft, 18- gates of segmental shape, 19- concora crush master
Pipe, the first branch pipe of 20-, the second branch pipe of 21-, 22- ball valve, 23- piston valve, 24- blowdown pipe, 401- overhaul lock well, 402- work
Lock well, 501- emergency lock well, 1001- have pressure section A, 1002- to have pressure section B, 1003- to have pressure section C, 1004- without pressure section.
Specific embodiment
Technical solution of the present invention is further described with reference to the accompanying drawing, but claimed range is not limited to institute
It states.
A kind of multistage water blocking blowdown system for high dam engineering of the invention, as shown in Figure 1, Figure 2, Figure 3 shows, including water blocking
Unit 1, the unit 2 that discharges water, concora crush unit 3 and tunnel 10, tunnel 10 are connected to water source, along water (flow) direction within tunnel 10, gear
Water unit 1, the unit 2 that discharges water are arranged in juxtaposition on tunnel 10 according to spacing appropriate, water blocking unit 1 include along tunnel 10 with
The n grade backwater gate device 4 that interior water (flow) direction is arranged in juxtaposition according to appropriate spacing, the unit 2 that discharges water includes along within tunnel 10
Water (flow) direction is arranged in juxtaposition emergency gate device 5 and emptying valve system 6 on tunnel 10 according to appropriate spacing, wherein
Upstream tunnel 10 positioned at first order backwater gate device 4 is to have pressure section A1001, positioned at first order backwater gate device 4 and most
Tunnel 10 between rear stage backwater gate device 4 is to have pressure section B1002, is located at afterbody backwater gate device 4 and accident
Tunnel 10 between valve system 5 is to have pressure section C1003, the tunnel 10 after emptying valve system 6 be without pressure section 1004,
Backwater gate device 4 includes the maintenance lock well 401 being successively arranged in juxtaposition along water (flow) direction within tunnel 10 and work lock well
402, emergency gate device 5 includes emergency lock well 501, is distinguished within maintenance lock well 401, work lock well 402 and emergency lock well 501
It is provided with the bulkhead gate 8, main gate 7 and emergency gate 14 that can block or be connected tunnel 10, concora crush unit 3 includes at least two
The concora crush supervisor 19 that item is arranged in juxtaposition, every concora crush, which is responsible on 19, is connected with the first branch pipe 20 and the second branch pipe 21, and first
At least two ball valves 22 and a piston valve 23 are mounted on pipe 20 and the second branch pipe 21, wherein the first branch pipe 20 and maintenance lock
Well 401 connects, and the second branch pipe 21 is connect with work lock well 402.
Using technical solution of the present invention, for the high dam engineering of 300m or more, it is city that tunnel floor, which is provided with section,
The tunnel of door opening shape reduces the hydraulic pressure from tunnel upstream by hydraulic pressure by the multistage backwater gate device of setting step by step, and
Every grade of backwater gate device is set to keep in balance the reduction effect of hydraulic pressure, to advantageously reduce retaining box in entire blowdown system
The setting series of door gear reduces construction work amount, reduces difficulty of construction, construction cost is saved, further, by setting
A plurality of equalizing pipe is set, so that each backwater gate device is interconnected, and multiple valves are set on equalizing pipe and are controlled, thus
Make to keep in balance to the reduction effect of hydraulic pressure in every grade of backwater gate device as much as possible, and the opening and closing pair of valve can be passed through
Hydraulic pressure within every grade of backwater gate device is adjusted, and is had laid a good foundation to be emptied completely head, in addition, also guaranteeing
Water level balance during the unit inspection operation that discharges water, in addition, in multistage backwater gate device, afterbody backwater gate dress
It is used when setting as maintenance, is also configured with corresponding blowdown pipe, tonifying Qi can be carried out into water body by blowdown pipe, avoid producing
The rough sledding such as raw cavitation, negative pressure.In addition, ensure that blowdown system retaining boxs at different levels at runtime by setting spilling water gallery
The hydraulic pressure of door gear does not exceed limit, is conducive to ensure blowdown system safe operation.
Further, along flow direction within tunnel 10, to last 1 grade of retaining box from the 2nd grade of backwater gate device 4
Door gear stops, and is additionally provided with feeding gallery A9, one end of feeding gallery A9 and inspection between arbitrary neighborhood two-stage backwater gate device 4
The connection of lock well 401 is repaired, the other end of feeding gallery A9 is connected to work lock well 402.Along water (flow) direction within tunnel 10, overflow
Gallery A9 import setting height is gradually successively decreased, and is matched with its previous stage backwater gate device 4 control water level elevation.Overflow corridor
The cross section outer contour shape of road A9 is gateway opening type shape.
In addition, the work lock well 402 of afterbody backwater gate device 4 also passes sequentially through feeding gallery B11, overflow vertical shaft
A12, concora crush vertical shaft 16 are connected to there is pressure section C1003, and feeding gallery B11 setting height is controlled with afterbody backwater gate device 4
Water level elevation processed matches, and concora crush is responsible for 19 ends and is also connected to concora crush vertical shaft 16.Overflow vertical shaft A12 connects with concora crush vertical shaft 16
Place is also connected to by feeding gallery C13 with without pressure section 1004.The cross section outer contour shape of feeding gallery B11 is round or city gate
Hole shape.When being preferably provided with feeding gallery A, feeding gallery B and feeding gallery C, the gradient is set are as follows: 1% to 3% is advisable.
Further, emptying valve system 6 includes the arc lock chamber 15 being connected to tunnel 10, is arranged within arc lock chamber 15
There is corresponding gates of segmental shape 18, gates of segmental shape 18 is movably connected or is truncated tunnel 10.
Further, the quantity of the first branch pipe 20 being connected to the same maintenance lock well 401 is at least 2, and same
The quantity for the second branch pipe 21 that work lock well 402 is connected to is at least 2.It is respectively set on first branch pipe 20 or the second branch pipe 21
There are at least two ball valves 22 and a piston valve 23.
Further, it is preferable to which 10 cross section of tunnel is single gateway opening type shape.
In addition, as shown in Figure 4, Figure 5, it is H that definition, which has pressure section A1001 head,0, 4 quantity of backwater gate device is n, there is pressure
Section B1002 cross section diameter is D, and backwater gate devices 4 at different levels bear head for Δ H, when backwater gate devices 4 at different levels are according to equal water
When thrust principle designs, then H0, between Δ H, D meet following relationship:
It is H that definition, which has pressure section A1001 head,0, 4 quantity of backwater gate device is n, and having pressure section B1002 cross section diameter is D,
It is H that backwater gate devices 4 at different levels, which bear head,i, wherein i=1,2,3 ..., n, when backwater gate devices 4 at different levels are according to differing
When hydraulic thrust principle designs, then H0、Hi, meet following relationship between D:
H0=H1+H2+…+Hn+D。
10 quantity of tunnel be it is a plurality of, and each tunnel 10 is respectively arranged in different elevations, wherein along tunnel 10 with
Interior water (flow) direction, between every tunnel 10 on be arranged in juxtaposition water blocking unit 1 according to appropriate spacing, discharge water unit 2, water blocking list
Member 1 includes the n grade backwater gate device 4 being arranged in juxtaposition along water (flow) direction within tunnel 10 according to appropriate spacing, and discharge water unit 2
Including emergency gate device 5 and the row being arranged in juxtaposition along water (flow) direction within tunnel 10 according to appropriate spacing on tunnel 10
Empty valve system 6, along the sequence of 10 elevation of tunnel from high to low, the backwater gate for being included within water blocking units 1 at different levels is filled
It sets 4 quantity to be incremented by step by step, definition 10 quantity of tunnel is k, and having pressure section A1001 head on each tunnel 10 is Hj, wherein j
=1,2 ..., k, having pressure section B1002 cross section diameter is D, then Hk, meet any one formula in following relationship between D:
Hj-Hj-1=D.
Wherein, Hj-Hj-1The maximum water blocking head of gates of segmental shape should be met, while being also contemplated that the water that tunnel base slope generates
Head is poor；Hj-Hj-1The maximum water blocking head of plate work gate should be met；Hj-Hj-1The highest gear of plate bulkhead gate should also be met
Water head.A whole set of blowdown system carries out whole manipulation by automation control system publication order, realize water storage, discharge water, overhaul,
Water blocking operating condition, and pass through the monitoring system real-time monitoring system operating condition and order executive condition of gates at different levels in system；System
The opening and closing of gates at different levels, the use of moisturizing pressure balance system, draining pressure balance system, snorkel are both needed to cooperation automation manipulation system in uniting
Various operations are completed in system instruction.
It further, further include blowdown pipe 24 for the multistage water blocking blowdown system of high dam engineering, blowdown pipe 24 is arranged in
Within the maintenance lock well 401 of last one of backwater gate device 4, one end of blowdown pipe 24 is higher than afterbody backwater gate device
The other end of 4 upstream water levels, blowdown pipe 24 is connected with maintenance lock well 401.
The technical solution of the application is practiced by Kweiyang Co., Ltd, survey and design research institute, Chinese electric construction group investment,
In an implementation, subsidy, the Chinese electric construction scientific research of support [2017] 2865 are closed by science and technology supporting project science and technology item Guizhou Province section, Guizhou Province
The subsidy of project DJ-ZDXM-2017-05 achieves above-mentioned beneficial technical effect, while social benefit is good after implementation.
Claims (13)
1. a kind of multistage water blocking blowdown system for high dam engineering, it is characterised in that: including water blocking unit (1), discharge water unit
(2), concora crush unit (3) and tunnel (10), the tunnel (10) are connected to water source, along water flow side within the tunnel (10)
To the water blocking unit (1), the unit that discharges water (2) are arranged in juxtaposition on the tunnel (10) according to spacing appropriate, the gear
Water unit (1) includes filling along water (flow) direction within the tunnel (10) according to the n grade backwater gate that appropriate spacing is arranged in juxtaposition
It sets (4), the unit that discharges water (2) includes being arranged in juxtaposition according to appropriate spacing in institute along water (flow) direction within the tunnel (10)
State the emergency gate device (5) on tunnel (10) and emptying valve system (6), wherein be located at first order backwater gate device
(4) upstream tunnel (10) is to have pressure section A (1001), is located at first order backwater gate device (4) and afterbody backwater gate
Tunnel (10) between device (4) is to have pressure section B (1002), is located at afterbody backwater gate device (4) and emergency gate fills
Setting the tunnel (10) between (5) is to have pressure section C (1003), and the tunnel (10) after emptying valve system (6) is nothing
It presses section (1004), the backwater gate device (4) includes successively being arranged in juxtaposition along water (flow) direction within the tunnel (10)
Lock well (401) and work lock well (402) are overhauled, the emergency gate device (5) includes emergency lock well (501), the maintenance lock
The tunnel (10) can be blocked or be connected by being respectively arranged within well (401), work lock well (402) and emergency lock well (501)
Bulkhead gate (8), main gate (7) and emergency gate (14), the concora crush unit (3) include at least two be arranged in juxtaposition it is flat
Pressure supervisor (19), every concora crush are responsible on (19) and are connected with the first branch pipe (20) and the second branch pipe (21), first branch pipe
(20) and on the second branch pipe (21) at least two ball valves (22) and a piston valve (23) are mounted on, wherein first branch pipe
(20) it is connect with the maintenance lock well (401), second branch pipe (21) connect with the work lock well (402).
2. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: along tunnel
Flow direction within hole (10) stops from the 2nd grade of backwater gate device (4) to last 1 grade of backwater gate device, arbitrary neighborhood two
It is additionally provided with feeding gallery A (9) between grade backwater gate device (4), one end of feeding gallery A (9) and maintenance lock well (401) are even
Logical, the other end of feeding gallery A (9) is connected to work lock well (402).
3. a kind of multistage water blocking blowdown system for high dam engineering according to claim 2, it is characterised in that: along institute
State water (flow) direction within tunnel (10), feeding gallery A (9) the import setting height is gradually successively decreased, and with its previous stage water blocking
Valve system (4) control water level elevation matches.
4. a kind of multistage water blocking blowdown system for high dam engineering according to claim 2, it is characterised in that: described to overflow
The cross section outer contour shape for flowing gallery A (9) is one of gateway opening type, circle, the shape of a hoof.
5. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: it is described most
The work lock well (402) of rear stage backwater gate device (4) also passes sequentially through feeding gallery B (11), overflow vertical shaft A (12), puts down
Pressure vertical shaft (16) has pressure section C (1003) to be connected to described, feeding gallery B (11) setting height and the afterbody backwater gate
Device (4) control water level elevation matches, and the concora crush supervisor (19) end is also connected to concora crush vertical shaft (16).
6. a kind of multistage water blocking blowdown system for high dam engineering according to claim 5, it is characterised in that: described to overflow
Flow through shaft A (12) also passes through feeding gallery C (13) with concora crush vertical shaft (16) joint and is connected to described without pressure section (1004).
7. a kind of multistage water blocking blowdown system for high dam engineering according to claim 5, it is characterised in that: described to overflow
The cross section outer contour shape for flowing gallery B (11) is one of gateway opening type, rectangle, circle, the shape of a hoof.
8. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: the row
Empty valve system (6) includes the arc lock chamber (15) being connected to the tunnel (10), is provided within arc lock chamber (15) corresponding
Gates of segmental shape (18), gates of segmental shape (18) is movably connected or is truncated the tunnel (10).
9. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: with it is described
The quantity of the first branch pipe (20) of same maintenance lock well (401) connection is at least 2, with the same work lock well
(402) quantity for the second branch pipe (21) being connected to is at least 2.
10. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: definition
It is described to have pressure section A (1001) head for H0, backwater gate device (4) quantity is n, and emptying valve system (6) participates in final stage
Head distribution, described to have pressure section B (1002) cross section diameter for D, backwater gate devices (4) at different levels and emptying valve system (6) are held
By head be Δ H, when backwater gate devices (4) at different levels and emptying valve system (6) according to etc. hydraulic thrusts principle design when, then
H0, between Δ H, D meet following relationship:
11. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: definition
It is described to have pressure section A (1001) head for H0, backwater gate device (4) quantity is n, described to have pressure section B (1002) section straight
Diameter is D, and it is H that backwater gate devices (4) at different levels, which bear head,i, wherein i=1,2,3 ..., n, emptying valve system (6) are then
Receiving head is Hn+1, when backwater gate devices (4) at different levels and emptying valve system (6) are designed according to the hydraulic thrusts principle such as not,
Then H0、Hi, meet following relationship between D:
H0=H1+H2+...Hn+1+D。
12. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: described
Tunnel (10) quantity is a plurality of, and each tunnel (10) is respectively arranged in different elevations, wherein within tunnel (10)
Water (flow) direction, between every tunnel (10) on be arranged in juxtaposition water blocking unit (1), the unit that discharges water (2), institute according to appropriate spacing
Stating water blocking unit (1) includes the n grade retaining box being arranged in juxtaposition along water (flow) direction within the tunnel (10) according to appropriate spacing
Door gear (4), the unit that discharges water (2) include being arranged in juxtaposition along water (flow) direction within the tunnel (10) according to appropriate spacing
Emergency gate device (5) and emptying valve system (6) on the tunnel (10), along the tunnel (10) elevation by height
To low sequence, the quantity for the backwater gate device (4) for being included within water blocking units (1) at different levels is incremented by step by step, described in definition
Tunnel (10) quantity is k, and described on each tunnel (10) to have pressure section A (1001) head be Hj, wherein j=1,2 ..., k, institute
Having stated pressure section B (1002) cross section diameter is D, then Hk, meet any one formula in following relationship between D:
Hj-Hj-1=D.
13. a kind of multistage water blocking blowdown system for high dam engineering according to claim 1, it is characterised in that: described
Tunnel (10) section configuration is one of gateway opening type, rectangle, circle, the shape of a hoof.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570453.2A CN109667248A (en) | 2018-12-21 | 2018-12-21 | A kind of multistage water blocking blowdown system for high dam engineering |
| PCT/CN2019/125828 WO2020125600A1 (en) | 2018-12-21 | 2019-12-17 | Multi-stage water retaining and emptying system for high dam engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570453.2A CN109667248A (en) | 2018-12-21 | 2018-12-21 | A kind of multistage water blocking blowdown system for high dam engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109667248A true CN109667248A (en) | 2019-04-23 |
Family
ID=66145764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811570453.2A Pending CN109667248A (en) | 2018-12-21 | 2018-12-21 | A kind of multistage water blocking blowdown system for high dam engineering |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109667248A (en) |
| WO (1) | WO2020125600A1 (en) |
Cited By (3)
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| CN110593225A (en) * | 2019-08-30 | 2019-12-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Multistage emptying tunnel hydraulics monitoring system |
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| CN112281766A (en) * | 2020-09-09 | 2021-01-29 | 中国水利水电第九工程局有限公司 | Construction method for bottom plate of spillway tunnel |
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| WO2020125600A1 (en) | 2020-06-25 |
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