CN105220663B - Stilling well for connecting vertical shaft with recession tunnel - Google Patents
Stilling well for connecting vertical shaft with recession tunnel Download PDFInfo
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- CN105220663B CN105220663B CN201510765424.1A CN201510765424A CN105220663B CN 105220663 B CN105220663 B CN 105220663B CN 201510765424 A CN201510765424 A CN 201510765424A CN 105220663 B CN105220663 B CN 105220663B
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- water
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- vertical shaft
- stilling pool
- tunnel
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Abstract
The invention discloses a stilling well for connecting a vertical shaft with a recession tunnel. The stilling well comprises a stilling well body. The water inlet end of the stilling well body is communicated with the water outlet end of the vertical shaft. The water outlet end of the stilling well body is communicated with the water inlet end of the recession tunnel. A splashing section, a buffering section and an adjusting section which are sequentially connected are arranged in the stilling well body. The water inlet end of the splashing section is communicated with the water outlet end of the vertical shaft. The water outlet end of the adjusting section is communicated with the water inlet end of the recession tunnel. The bottom plate elevation of the water inlet end of the adjusting section is not lower than the bottom plate elevations of the splashing section and the buffering section. The bottom plate elevation of the water outlet end of the adjusting section is higher than the bottom plate elevations of the splashing section and the buffering section. The adjusting section is of a reverse slope structure with the water outlet end higher than the water inlet end. By means of the stilling well, splashed and ejected water bodies can be prevented from hitting the top of the recession tunnel, safety of concrete structures is ensured, the requirement for the discharge capacity of the recession tunnel is met to the maximum extent, and meanwhile the water flow state in the recession tunnel is stable and smooth.
Description
Technical field
The present invention relates to the flood-discharge energy-dissipating field of Hydraulic and Hydro-Power Engineering shaft spillway, particularly one kind connect vertical shaft and move back
The stilling pool slab of water tunnel.
Background technology
Shaft spillway is used for the flood-discharge energy-dissipating of Hydraulic and Hydro-Power Engineering, as shown in figure 1, its key component is: overflow
Weir 1, changeover portion 2, vertical shaft 3, stilling pool slab 4, water-break tunnel 5.Water-break tunnel is connected with stilling pool slab 4.
The current of shaft spillway, through downflow weir, form high-velocity flow in downflow weir curve lower end；High-velocity flow is in mistake
Cross section and depart from shaft wall, and free-electron model in vertical shaft cavity, there is shearing and Involving velocity with air in falling process,
In the water body that substantial amounts of gas of carrying under one's arms is injected in stilling pool slab, cause fierce collision, shearing and blending, disappear substantial amounts of energy of stopping；
Current are being redirected into water-break tunnel in stilling pool slab in the way of pressure flow or free flow, then flow into downstream rivers and canals.
In vertical shaft, the current high speed of free-electron model injects stilling pool slab, collides with the water body in stilling pool slab, produces strong
Sharp splash and launch, water surface rolling spring up.Swash the top that the water body splashing and launching bounces water-break tunnel inlet section, to hole
Top xoncrete structure brings detrimental effect.When the current that rolling springs up are redirected into water-break tunnel in the way of free flow, move back
Flow-shape extremely unstable in water tunnel.
The gripper path analysis of current in stilling pool slab, the wall due to cylinder type stilling pool slab has rigid side to current
To restraining forceies, the inflow of current occurs in same locus with flowing out, momentum and the momentum direction flowed out that current flow into
On the contrary, become a mandarin and go out stream frontal collisions occur, outflows momentum straight up on the water body of inflow, thus result in water
Stream is strong sharp to be splashed and launches.In order to ensure the safety of water-break tunnel concrete structure, make the current in water-break tunnel simultaneously
Fluidised form steady and smooth, needs a kind of structure of stationary flow fluidised form in shaft spillway.
Content of the invention
Current in order to solve to inject at a high speed in vertical shaft are collided with the water body in stilling pool slab, produce strong sharp splash and
The problem of ejection, the present invention is intended to provide a kind of stilling pool slab connecting vertical shaft and water-break tunnel is it is ensured that water-break tunnel concrete is tied
The safety of structure, the discharge capacity simultaneously meeting water-break tunnel requires, and keeps flow-shape steady and smooth.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of stilling pool slab connecting vertical shaft and water-break tunnel, the water inlet end of described stilling pool slab is connected with the water side of vertical shaft,
The water side of this stilling pool slab is connected with the water inlet end of water-break tunnel；It is structurally characterized in that, is provided with and connects successively in described stilling pool slab
Connect sharp splash section, buffer field and adjustment section；The described water side swashing the water inlet end and vertical shaft splashing section connects, described tune
The water side of main plot section is connected with the water inlet end of water-break tunnel；The floor elevation of described adjustment section water inlet end is not less than Ji Jian area
Section and the floor elevation of buffer field；The floor elevation of described adjustment section water side is higher than to swash the bottom splashing section and buffer field
Plate hight journey；Described adjustment section is higher than the reverse slope structure of water inlet end for water side.
Thus, the present invention arranges to swash in stilling pool slab and splashes section, buffer field and adjustment section, and the water body of three sections is
Connection, and sequential on locus.High-velocity flow injects stilling pool slab from vertical shaft, and the movement locus of current are sharp successively
Splash section, buffer field and adjustment section, in stilling pool slab the inflow of current with flow out not in same locus, it is to avoid enter
Stream and the frontal collisions going out stream, current momentum transformation straight down is the momentum in horizontal direction, will not act on inflow
On water body, thus current sharp is greatly reduced splashing and ejection altitude, it is to avoid water body bounces the top of water-break tunnel.
According to embodiments of the invention, the present invention can also be made with further optimization, below for the skill of formation after optimizing
Art scheme:
Preferably, described swash splash section and be equal to vertical shaft diameter along the length of water (flow) direction, described swash splash the depth of section
For the water-break tunnel maximum earial drainage depth of water 2～4 times.Described depth refers to water-break tunnel import floor elevation and splashes section base plate with swashing
The difference of elevation.
Preferably, described buffer field is 1～2 times of vertical shaft diameter along the length of water (flow) direction, the depth of buffer field
Spend 2～4 times for the water-break tunnel maximum earial drainage depth of water.Described depth refers to water-break tunnel import floor elevation and buffer field bottom
The difference of plate hight journey.
Preferably, described adjustment section is 2～3 times of vertical shaft diameter along the length of water (flow) direction, adjusts the depth of section
Degree reduces along water (flow) direction.
Preferably, described stilling pool slab is 4～6 times of vertical shaft diameter along the entire length of water (flow) direction, and stilling pool slab is
Big depth is 2～4 times of the water-break tunnel maximum earial drainage depth of water.Described depth capacity refers to water-break tunnel import floor elevation and disappears
The difference of power well floor elevation.
Preferably, the width of described stilling pool slab water inlet end is equal to vertical shaft diameter, and the width of described stilling pool slab water side is equal to
The width of water-break tunnel.Further, when the width of stilling pool slab and the width of water-break tunnel are inconsistent, described stilling pool slab
Adjustment section is passed through flaring or tapered is connected with water-break tunnel.
The base plate of the adjustment section of described stilling pool slab is along water (flow) direction generally slope pattern, stair-step pattern or staggered
The tooth bank pattern of arrangement.
According to embodiments of the invention, described vertical shaft water inlet end passes through the changeover portion being vertically arranged with downflow weir bottom even
Logical.Further, the bottom flaring of described changeover portion is connected with vertical shaft water inlet end.
Compared with prior art, the stilling pool slab of the had the beneficial effect that present invention of the present invention relieves current downstream
The rigid constraint of wall, to splash momentum transformation straight down in section and buffer field be dynamic in horizontal direction to current swashing
Amount, it is to avoid become a mandarin and the frontal collisions going out stream, reduces current momentum-exchange straight up to greatest extent, and reduction current are sharp to be splashed
With the height of ejection it is ensured that the safety of water-break tunnel concrete structure；Current splash section and buffering in the limited sharp of stilling pool slab
In the water body of section, can disappear as conventional stilling pool slab part energy of stopping, and can retain a part of kinetic energy so that current are protected
Hold certain speed and enter water-break tunnel, the discharge capacity meeting water-break tunnel to greatest extent requires；By adjusting section rank
Ladder or the Stabilization of tooth bank, current can stably enter water-break tunnel, so that the flow-shape in water-break tunnel is put down
Surely smooth.
Brief description
Fig. 1 is existing shaft spillway sectional view；
Fig. 2 is the sectional view of an embodiment of the present invention；
Fig. 3 is a kind of stilling pool slab plane of the present invention；
Fig. 4 is another kind of stilling pool slab plane graph of the present invention；
Fig. 5 is another stilling pool slab plane graph of the present invention；
Fig. 6 is the sectional view of present invention another kind embodiment；
Fig. 7 is the sectional view of another embodiment of the present invention.
In in figure, 1 downflow weir, 2 changeover portions, 3 vertical shafts, 4 stilling pool slab, 5 water-break tunnels, a is sharp to splash section,
B buffer field, c adjusts section.
Specific embodiment
Embodiment 1
As shown in Figure 2 and Figure 3, the present embodiment includes stilling pool slab 4, the water inlet end of described stilling pool slab 4 and the water outlet of vertical shaft 3
End connects, and described vertical shaft 3 water inlet end is connected with downflow weir 1 bottom by changeover portion 2, is provided with Ji Jian area in described stilling pool slab 4
Section a, buffer field b and adjustment section c, and be sequentially connected, the floor elevation that described stilling pool slab adjusts section c is higher than buffer field
The floor elevation of b, forms step, the front half section of adjustment section c is horizontal plane, and the second half section is stair-step pattern on perpendicular,
End is connected with water-break tunnel 5.
As shown in Figure 4 and Figure 5, when the width of stilling pool slab 4 and the width of water-break tunnel 5 are inconsistent, adjustment section c passes through
Flaring or tapered be connected with water-break tunnel 5.
In the present invention, shaft spillway import adopts ring-like downflow weir, ring-like weir outer circumference diameter 12m, weir crest upstream curve
For 1/4 circular curve, weir crest downstream is 1/4 elliptic curve；Changeover portion is connected with vertical shaft using flaring mode；Vertical shaft adopts internal diameter
Circular Shaft for 4m；Stilling pool slab width is 4m, and depth is 6m, and length is 16m, wherein: swashs and splashes section, buffer field and adjustment
The length of section is respectively 4m, 4m and 8m；The horizontal plane length of adjustment section is 4m with ladder segment length, and depth is 3m；Logical
Cross ladder transition to water-break tunnel floor elevation；Water-break tunnel is equal with stilling pool slab width.
Embodiment 2
As shown in fig. 6, the stilling pool slab of the present embodiment adjusts the ramp structure of section c generally stair-step pattern, remaining structure
Similar with embodiment 1, repeat no more.
Embodiment 3
As shown in fig. 7, stilling pool slab adjustment section c generally ramp structure, remaining structure and embodiment 1 class of the present embodiment
Same, repeat no more.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after having read the present invention, the various equivalent form of values to the present invention for the those skilled in the art
Modification each fall within the application claims limited range.
Claims (4)
1. a kind of stilling pool slab connecting vertical shaft and water-break tunnel, the water inlet end of described stilling pool slab (4) is connected with the water side of vertical shaft (3)
Logical, the water side of this stilling pool slab (4) is connected with the water inlet end of water-break tunnel (5)；It is characterized in that, set in described stilling pool slab (4)
It is equipped be sequentially connected sharp and splash section (a), buffer field (b) and adjustment section (c)；Described swash splash the water inlet end of section (a) with
The water side connection of vertical shaft (3), the water side of described adjustment section (c) is connected with the water inlet end of water-break tunnel (5)；Described adjustment
The floor elevation of section (c) water inlet end is not less than and swashs the floor elevation splashing section (a) and buffer field (b)；Described adjustment section
C the floor elevation of () water side is higher than to swash the floor elevation splashing section (a) and buffer field (b)；Described adjustment section (c) is
Water end (W.E.) is higher than the reverse slope structure of water inlet end；
Described swash splash section (a) and be equal to vertical shaft (3) diameter along the length of water (flow) direction, described swash splash the depth of section (a) and be
2～4 times of water-break tunnel (5) the maximum earial drainage depth of water；
Described buffer field (b) is 1～2 times of vertical shaft (3) diameter along the length of water (flow) direction, the depth of buffer field (b)
For water-break tunnel (5) the maximum earial drainage depth of water 2～4 times；
Described adjustment section (c) is 2～3 times of vertical shaft (3) diameter along the length of water (flow) direction, adjusts the depth of section (c)
Reduce along water (flow) direction；
Described stilling pool slab (4) is 4～6 times of vertical shaft (3) diameter along the entire length of water (flow) direction, the maximum of stilling pool slab (4)
Depth is 2～4 times of water-break tunnel (5) the maximum earial drainage depth of water.
2. the stilling pool slab connecting vertical shaft and water-break tunnel according to claim 1 is it is characterised in that described stilling pool slab (4)
The width of water inlet end is equal to vertical shaft (3) diameter, and the width of described stilling pool slab (4) water side is equal to the width of water-break tunnel (5).
3. the stilling pool slab connecting vertical shaft and water-break tunnel according to claim 2 is it is characterised in that described stilling pool slab (4)
Adjustment section (c) pass through flaring or tapered be connected with water-break tunnel (5).
4. the stilling pool slab connecting vertical shaft and water-break tunnel according to one of claim 1-3 is it is characterised in that the described power of disappearing
The base plate of adjustment section (c) of well (4) is along water (flow) direction generally slope pattern, stair-step pattern or staggered tooth bank
Pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765424.1A CN105220663B (en) | 2015-11-11 | 2015-11-11 | Stilling well for connecting vertical shaft with recession tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765424.1A CN105220663B (en) | 2015-11-11 | 2015-11-11 | Stilling well for connecting vertical shaft with recession tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105220663A CN105220663A (en) | 2016-01-06 |
| CN105220663B true CN105220663B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510765424.1A Active CN105220663B (en) | 2015-11-11 | 2015-11-11 | Stilling well for connecting vertical shaft with recession tunnel |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107264022B (en) * | 2017-07-19 | 2022-10-21 | 青岛黎马敦包装有限公司 | Gravure printing ink supply system with ink spraying device |
| CN108517844A (en) * | 2018-04-27 | 2018-09-11 | 四川大学 | A kind of stilling pool slab outlet bottom plate is the rotational flow silo flood discharging tunnel of adverse slope type structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU975878A1 (en) * | 1975-06-18 | 1982-11-23 | Sred Az Otdel V Proektno Izysk | Shaft spillway |
| SU1359402A1 (en) * | 1986-01-06 | 1987-12-15 | Казахский научно-исследовательский институт энергетики | Hydraulic spillway |
| CN101324084A (en) * | 2008-07-29 | 2008-12-17 | 四川大学 | Silo bottom rectifying energy dissipator |
| CN205088647U (en) * | 2015-11-11 | 2016-03-16 | 中国电建集团中南勘测设计研究院有限公司 | Power that disappears well of connecting shaft and water -break tunnel |
-
2015
- 2015-11-11 CN CN201510765424.1A patent/CN105220663B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU975878A1 (en) * | 1975-06-18 | 1982-11-23 | Sred Az Otdel V Proektno Izysk | Shaft spillway |
| SU1359402A1 (en) * | 1986-01-06 | 1987-12-15 | Казахский научно-исследовательский институт энергетики | Hydraulic spillway |
| CN101324084A (en) * | 2008-07-29 | 2008-12-17 | 四川大学 | Silo bottom rectifying energy dissipator |
| CN205088647U (en) * | 2015-11-11 | 2016-03-16 | 中国电建集团中南勘测设计研究院有限公司 | Power that disappears well of connecting shaft and water -break tunnel |
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| CN105220663A (en) | 2016-01-06 |
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