CN117513260A - Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel - Google Patents
Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel Download PDFInfo
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- CN117513260A CN117513260A CN202310945324.1A CN202310945324A CN117513260A CN 117513260 A CN117513260 A CN 117513260A CN 202310945324 A CN202310945324 A CN 202310945324A CN 117513260 A CN117513260 A CN 117513260A
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- tunnel
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 137
- 238000007599 discharging Methods 0.000 claims abstract description 41
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 28
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000009423 ventilation Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 241001529849 Dracocephalum Species 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Barrages (AREA)
Abstract
The application relates to a drainage structure combining a diversion tunnel, a drainage tunnel and a shaft type flood drainage tunnel. The application is applicable to the field of hydraulic and hydroelectric engineering. The technical problems to be solved are as follows: a spillway structure combining a diversion tunnel, a spillway tunnel and a shaft type spillway tunnel is provided. The technical proposal is as follows: a spillway structure combining diversion tunnel, a spillway tunnel and a shaft type spillway tunnel, which is characterized by comprising: the vertical shaft type flood discharging tunnel is provided with a vertical shaft water inlet structure arranged on the upstream side of the water retaining building, the vertical shaft water inlet structure is communicated with energy dissipation facilities on the downstream side of the water retaining building through a water outlet, and the vertical shaft type flood discharging tunnel can be used for discharging flood from an upstream water reservoir of the water retaining building in the operation period; the diversion drainage hole, diversion drainage hole one end intercommunication manger plate building upstream side, the other end intercommunication the water return hole, and through the water return hole intercommunication the energy dissipation facility, this diversion drainage hole can be used for the construction period water conservancy diversion and the operation period to carry out manger plate building upstream water reservoir storehouse water and empty and flood discharge.
Description
Technical Field
The invention relates to a drainage structure combining a diversion tunnel, a drainage tunnel and a shaft type flood drainage tunnel. The hydraulic and hydroelectric engineering system is suitable for the field of hydraulic and hydroelectric engineering.
Background
The conventional pumped storage power station is built in a mountain area with a certain height difference. In order to meet the water storage requirement, the original river channel is blocked by a water retaining building, and water is stored into a warehouse. The water flow in the natural river course belongs to slow flow, the single wide flow is distributed uniformly along the river width direction, and the water flow state is disturbed due to the construction of the water retaining building.
In order to meet the requirements of dry construction of a water retaining building and the requirements of emptying and flood discharging of water in a reservoir in a permanent operation stage, diversion tunnels, discharge tunnels and shaft type flood discharging tunnels (or spillways) are often required to be respectively built on one side or two sides of the water retaining building. The water flow flowing through the tunnel usually presents different flow states due to the different cross section sizes and tunnel structure types of the tunnel.
In actual engineering, three tunnels are required to be arranged independently due to different water flow states in the three tunnels, and the three tunnels are not economical enough; and often because of the restriction of the site condition of manger plate building both sides, cause the difficulty that many tunnels were arranged.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems, the drainage structure combining the diversion tunnel, the drainage tunnel and the vertical shaft type flood drainage tunnel is provided, so that the engineering structure is simplified, and the engineering cost is reduced.
The technical scheme adopted by the invention is as follows: a spillway structure combining diversion tunnel, a spillway tunnel and a shaft type spillway tunnel, which is characterized by comprising:
the vertical shaft type flood discharging tunnel is provided with a vertical shaft water inlet structure arranged on the upstream side of the water retaining building, the vertical shaft water inlet structure is communicated with energy dissipation facilities on the downstream side of the water retaining building through a water outlet, and the vertical shaft type flood discharging tunnel can be used for discharging flood from an upstream water reservoir of the water retaining building in the operation period;
the diversion drainage hole, diversion drainage hole one end intercommunication manger plate building upstream side, the other end intercommunication the water return hole, and through the water return hole intercommunication the energy dissipation facility, this diversion drainage hole can be used for the construction period water conservancy diversion and the operation period to carry out manger plate building upstream water reservoir storehouse water and empty and flood discharge.
The vertical shaft water inlet structure comprises a vertical shaft structure, and a flood discharging tunnel water inlet and an energy dissipation well which are respectively connected to the upper end and the lower end of the vertical shaft structure;
a vertical shaft slope pressing section is arranged between the vertical shaft water inlet structure and the water return hole, one end of the vertical shaft slope pressing section is communicated with the lower part of the vertical shaft structure, and the other end of the vertical shaft slope pressing section is connected with the water return hole.
The flood discharge tunnel water inlet is provided with an annular thin-wall weir, and at least one barrier is arranged at the top of the annular thin-wall weir.
And a vertical shaft vent hole is commonly arranged in the water inlet of the flood discharging hole, the vertical shaft structure and the vertical shaft pressure slope section, one end of the vertical shaft vent hole is communicated with the water withdrawal hole, and the other end of the vertical shaft vent hole extends to the top surface of the barrier.
The diversion and relief hole comprises a diversion and relief hole water inlet, an upstream hole body section, a maintenance gate well, an arc gate working section and a downstream chute section which are sequentially communicated along the water flow direction;
the overhaul gate is arranged in the overhaul gate well; the arc gate working section is internally provided with an arc gate which can be used for controlling the flow rate of water flow and can adjust the flow state of water flow in the hole from pressure to non-pressure.
The arc door working section comprises a gradual change section, a slope pressing section, an arc door cavity and a parabolic section which are sequentially communicated along the water flow direction;
the arc gate is arranged in the arc gate cavity, an arc gate control chamber is arranged above the arc gate cavity, and the arc gate control chamber is communicated with the ground through a control chamber traffic hole.
The horizontal length of the gradual change section is required to be more than 1.5 times of the width of the upstream tunnel body section.
The lower part of the bottom plate of the radial gate of the arc gate chamber is provided with a drop ridge, the lower part of the drop ridge is transited to the downstream chute section through the bottom plate of the parabolic section, and the bottom plate of the parabolic section adopts y= -ax 2 Parabolic form of a>0; if the slope of the downstream chute section is i, the horizontal length of the parabolic section satisfies l=i/(2 a).
The first derivative of the parabola is obtained, and the slope k=y' = -2ax of the parabola is obtained (note: x is the horizontal length of the parabola segment). In order to ensure smooth connection of the downstream chute section and the parabolic section, when the parabolic section is connected with the downstream chute section, the chute section is tangent to the end point of the parabolic section, and at the moment, the absolute value of i k is equal to i and the absolute value of i is equal to-2 ax is equal to i, so that x=i/(2 a) is obtained.
And working arc door ventilation holes which are communicated with the arc door cavity and the top of the overhaul gate well are formed in the overhaul gate well, the gradual change section and the pressure slope section.
The horizontal section of the ventilation hole of the working arc door is upward inclined by an angle of 5-10 degrees.
The beneficial effects of the invention are as follows: the vertical shaft type flood discharging hole can be used for discharging flood from an upstream water reservoir of a water retaining building in the operation period, the diversion discharging hole is communicated with an energy dissipation facility at the downstream side of the water retaining building through a water discharging hole in the vertical shaft type flood discharging hole, diversion can be carried out in the construction period as the diversion hole, and water discharging and flood discharging of the upstream water reservoir of the water retaining building can be carried out in the operation period as the discharging hole. The invention realizes the purpose of converting pressurized water flow in the drainage hole into pressureless water flow by means of the arc gate in the diversion drainage hole, thereby integrating the diversion hole, the drainage hole and the vertical shaft type flood drainage hole and simplifying the complex process of respectively constructing a plurality of tunnels; and a feasible solution is provided for the fact that a plurality of tunnels cannot be arranged respectively due to limited site conditions, so that the construction period and funds are effectively saved.
In aspects of flood regulating and discharging, when the incoming flow is not large and the water level of reservoir water is lower than the inlet elevation of the vertical shaft type flood discharging tunnel, the flood discharging tunnel independently operates to bear reservoir water emptying, flood regulating and general flood discharging tasks; when the incoming flow is large, the water level of the reservoir reaches above the inlet elevation of the vertical shaft type flood discharging tunnel, the discharge tunnel is regulated by the radial gate, and the water flow in the tunnel is changed from a pressurized flow state to a pressureless flow state, so that the combined discharge with the vertical shaft type flood discharging tunnel is realized.
According to the invention, by adjusting the opening and closing angles of the arc gate of the discharging hole, the water flow of the rear discharging groove section of the arc gate of the discharging hole is in a pressureless flow state, the slope of the hole body of the discharging groove section is larger than that of the front hole body of the working arc gate, the normal drainage of the water flow can be ensured, and meanwhile, the pressureless operation requirement of the water withdrawal hole section of the vertical shaft type flood discharge hole can be met.
Drawings
Fig. 1 is a schematic plan view of an embodiment.
FIG. 2 is a cross section of a diversion relief hole in an embodiment.
Fig. 3 is an enlarged schematic view of the portion a in fig. 2.
Fig. 4 is a C-C cross-sectional view of fig. 2.
Fig. 5 is a cross section of a shaft type spillway tunnel in an embodiment.
Fig. 6 is a schematic plan layout of a water inlet of a spillway tunnel in an embodiment.
Fig. 7 is a D-D cross-sectional view of fig. 3.
Wherein, the water retaining building-1; diversion drain hole-2; shaft type flood discharge tunnel-3; a diversion drain hole water inlet-4; an upstream tunnel-5; a gate well 6 is overhauled; arc door working section-7; a downstream chute section-8; a flood discharge hole water inlet-9; shaft structure-10; energy dissipating well-11; a shaft slope pressing section-12; a water outlet hole-13; energy dissipation facilities-14; gate slot-15; an air vent hole-16 of the working arc door; a service gate vent-17; a gradual change section-18; a slope pressing section-19; arc door control chamber-20; parabolic section-21; control room traffic hole-22; radial gate-23; arc gate opening and closing equipment-24; a radial gate bottom plate-25; overflow weir-26; the spacer pier-27; shaft ventilation aperture-28.
Detailed Description
The embodiment relates to a drainage structure combining a diversion tunnel, a drainage tunnel and a shaft type flood drainage tunnel, which comprises the shaft type flood drainage tunnel and the diversion drainage tunnel which can be used as the diversion tunnel and the drainage tunnel.
The vertical shaft type flood discharging tunnel in the embodiment is used for discharging flood in an upstream water reservoir of a water retaining building in the operation period and comprises a vertical shaft water inlet structure, a vertical shaft pressure slope section and a water outlet. The vertical shaft water inlet structure is positioned in an upstream water warehouse of the water retaining building and is provided with a vertical shaft structure, the upper end of the vertical shaft structure is provided with a water inlet of the flood discharging tunnel, and the lower end of the vertical shaft structure is provided with an energy dissipation well; the downstream side of the shaft structure is provided with a shaft slope pressing section, one end of the shaft slope pressing section is communicated with the lower part of the shaft structure, and the other end of the shaft slope pressing section extends to an energy dissipation facility at the downstream of the water retaining building through the water return hole.
In the embodiment, the section of the water inlet of the flood discharge hole is circular, and comprises an inlet overflow weir and a barrier pier, wherein the inlet overflow weir is generally an annular thin-wall weir, and the height of a weir top is the same as that of a normal water storage level; in order to control the overflow width and prevent the formation of rotary water flow on the weir, 6 spacers are arranged on the weir roof and separated into 6 surface hole overflows which are symmetrically arranged. The bottom of the overflow weir is connected with a shaft structure, the shaft adopts a round section, and adopts reinforced concrete lining, and the size and concrete of the energy dissipation well are the same as those of the shaft.
In order to ensure that high-speed water flow can be fully aerated after passing through the shaft slope pressing section, the concrete of the shaft slope pressing section is provided with vent holes, and the size of the vent holes is preferably selected by taking the air speed in the vent holes as the standard of less than 60 m/s. The vent hole penetrates through the compressed slope concrete, extends upwards in the vertical shaft structural lining, and penetrates through the overflow weir and the pier-isolating concrete to be communicated with the outside. The thickness of the ventilation hole lining of the vertical shaft section is 0.35m, and concrete pouring with the same label is uniformly adopted for convenient construction.
In this embodiment, the water drainage tunnel is a gate hole, and the cross-section size of the water drainage tunnel needs to be calculated and determined by combining the flood regulation requirements and working conditions of the diversion tunnel, the drainage tunnel and the vertical shaft type flood discharge tunnel. The energy dissipation facility adopts underflow energy dissipation, and an open channel is generally adopted to expand and dig a receiving and dissipating pond, and a guard is connected behind the dissipating pond, and the dimensions of the absorbing pond and the dissipating pond are trapezoidal sections, so that the energy dissipation effect of the vertical shaft and the dissipating pond is good.
The diversion and drainage hole is used for conducting diversion and drainage and flood drainage of an upstream water reservoir of a water retaining building in a construction period and a running period, and comprises a diversion and drainage hole water inlet, an upstream hole body section, a maintenance gate well, an arc gate working section and a downstream chute section which are sequentially communicated in the water flow direction, wherein the section of the upstream hole body section is a gate hole type, the downstream chute section is a gate hole type, and the net section size of the upstream hole body section is generally smaller than or equal to the net section size of the downstream chute section; the arc door working section comprises a gradual change section, a slope pressing section, an arc door cavity and a parabolic section which are sequentially communicated along the water flow direction.
In the embodiment, the water inlet of the diversion drainage hole is positioned in the reservoir at the upstream of the water retaining building, the construction period is finished, and the water inlet of the drainage hole is arranged with a slag blocking ridge or is rebuilt into a dragon head or shaft type so as to meet the silt elevation requirement in the permanent operation period.
In the embodiment, the width and the height of a gate slot in a gate well are determined according to the section size of an upstream hole body section; and determining the thickness of the gate slot according to the water head height of the reservoir.
In the embodiment, a working arc door vent hole and a service gate vent hole are arranged in a lining of a service gate well, one end of the working arc door vent hole extends to the top of the service gate well, the other end of the working arc door vent hole extends to an arc door cavity through a gradual change section and a slope pressing section, the working arc door vent hole is a circular hole, the section size of the vent hole is selected, the wind speed in the vent hole is preferably smaller than 60m/s, the diameter of the vent hole is 1m, and the horizontal section of the vent hole needs to be upward inclined by an angle of 5-10 degrees; the vent hole of the overhaul gate is a circular hole, the air speed in the vent hole is preferably less than 60m/s, and the diameter of the vent hole is 1m.
In the embodiment, the transition section and the slope pressing section are of tunnel section top plate design structures between the overhaul gate and the working arc gate, and slope fold line type design is adopted, so that the effect of pressing down water head transition water flow is achieved.
In the embodiment, the bottom of the arc door cavity is provided with an arc door bottom plate, the arc door cavity is internally provided with an arc door and arc door opening and closing equipment, the arc door can adjust the flow state of water in the hole and can control the leakage flow of the leakage hole, an arc door control chamber is arranged above the arc door cavity, and the arc door control chamber is communicated with the ground through a control chamber traffic hole. The minimum section size of the traffic hole of the arc door control room is 3 multiplied by 3 (width multiplied by height), and the maximum gradient is less than or equal to 12 percent.
In the embodiment, the lower stream of the bottom plate of the radial gate forms a drop sill and then is transited to a downstream chute section through a parabolic section bottom plate, and the parabolic section bottom plate adopts y= -ax 2 Parabolic form of a>0; if the slope of the downstream chute section is i, the horizontal length of the parabolic section satisfies l=i/(2 a).
In the embodiment, the downstream end of the downstream chute section is communicated with a water withdrawal hole of the shaft type spillway tunnel through the chute section turning section.
The embodiment is suitable for reservoir water drainage and total drainage rate Q less than or equal to 1000m in construction period 3 Pumped storage power station and other conventional reservoir engineering with/s flood discharge requirement. The method provides a feasible idea for the situation that the site conditions are limited and a plurality of tunnels are respectively arranged on two sides or one side of the water retaining building. The method provides a feasible idea for the fact that a conventional pumped storage power station discharging hole cannot be effectively combined with a vertical shaft type flood discharging hole.
The device has a flow guiding function in the construction period; when the running period has smaller flow and has the reservoir water emptying requirement, the discharging hole can independently play roles of emptying the reservoir and general flood discharging; when the incoming flow is large, the flood discharge tunnel and the vertical shaft type flood discharge tunnel are combined for discharging.
In the embodiment, the construction period is taken as a diversion tunnel to bear a diversion task; and when the construction period is over, the slag blocking ridge is required to be arranged at the inlet or the slag blocking ridge is required to be rebuilt into a dragon head or shaft type, so that the inlet elevation is ensured to meet the requirement of silt in the permanent operation period.
In the embodiment, the section size of the tunnel of the upstream section of the diversion and drainage tunnel inspection gate shaft and the section size of the tunnel of the downstream section of the working arc gate can be different, and the section size is selected according to engineering practice and hydraulic calculation results. The section size of the tunnel at the downstream chute section of the diversion and drainage tunnel working arc door is preferably consistent with the section size of the water withdrawal tunnel section of the vertical shaft type flood drainage tunnel.
The arc door control room enters through the arc door control room traffic hole. The bottom of the control chamber is provided with an arc gate for adjusting the flow state of water and controlling the leakage flow rate of the leakage hole. The size and the opening and closing mode of the radial gate are required to be selected in combination with the actual engineering. The radial gate opening and closing mode used in the embodiment is an oil pressure opening and closing machine opening and closing mode.
The bottom plate of the arc gate at the lower part of the arc gate working chamber is of a horizontal structure, the section extends to a certain length at the downstream of the arc gate, a falling ridge is arranged at the downstream of the flat section, a parabolic section connecting the bottom plate of the arc gate and the downstream chute section is arranged at the downstream of the falling ridge, and the parabolic type is y= -ax 2 . In the case of determining the chute section gradient i, the parabolic section horizontal length l has the following relationship with the chute section gradient i:
i＝2al
the gradient of the water return tunnel needs to meet the drainage requirement of the vertical shaft type flood discharge tunnel preferentially, and the general requirement is less than or equal to 10 percent. Meanwhile, the gradient of the drainage channel section of the diversion drainage tunnel is as consistent as possible with the gradient of the water return tunnel. Under the condition that the gradient of the diversion drain hole is consistent with the gradient of the water return hole, the gradient i of the water return hole and the downstream parabola of the radial gate also meet the requirement of i=2al (the parabola type is y= -ax) 2 A is a constant greater than 0 and l is the parabolic horizontal segment length). The water-withdrawal tunnel runs under no pressure and adopts reinforced concrete lining.
In order to ensure that the water flow in the diversion drainage hole does not damage the tunnel when the arc door is opened and closed. An air vent is required to be arranged at the arc door. The vent hole is connected with the inside of the lining of the accident inspection gate well, the wind speed in the vent hole is preferably less than 60m/s, and the elevation angle of the horizontal section of the vent hole is required to be 5-10 degrees.
In order to weaken the energy of water flow as much as possible, energy dissipation facilities are arranged at the bottom of a vertical shaft of the vertical shaft type flood discharge tunnel and at the outlet of the water withdrawal tunnel respectively. In the embodiment, the bottom of a vertical shaft type flood discharge tunnel adopts an energy dissipation mode of an energy dissipation well; the outlet of the water return tunnel adopts underflow energy dissipation, water flows through the open channel diffusion section and then is connected with the stilling pool, and a guard is arranged and is introduced into a downstream river channel.
Claims (10)
1. A spillway structure combining diversion tunnel, a spillway tunnel and a shaft type spillway tunnel, which is characterized by comprising:
the vertical shaft type flood discharging tunnel is provided with a vertical shaft water inlet structure arranged on the upstream side of the water retaining building, the vertical shaft water inlet structure is communicated with energy dissipation facilities on the downstream side of the water retaining building through a water outlet, and the vertical shaft type flood discharging tunnel can be used for discharging flood from an upstream water reservoir of the water retaining building in the operation period;
the diversion drainage hole, diversion drainage hole one end intercommunication manger plate building upstream side, the other end intercommunication the water return hole, and through the water return hole intercommunication the energy dissipation facility, this diversion drainage hole can be used for the construction period water conservancy diversion and the operation period to carry out manger plate building upstream water reservoir storehouse water and empty and flood discharge.
2. The spillway structure combining a diversion tunnel, a spillway tunnel and a shaft type spillway tunnel as claimed in claim 1, wherein: the vertical shaft water inlet structure comprises a vertical shaft structure, and a flood discharging tunnel water inlet and an energy dissipation well which are respectively connected to the upper end and the lower end of the vertical shaft structure;
a vertical shaft slope pressing section is arranged between the vertical shaft water inlet structure and the water return hole, one end of the vertical shaft slope pressing section is communicated with the lower part of the vertical shaft structure, and the other end of the vertical shaft slope pressing section is connected with the water return hole.
3. The spillway structure combining a diversion tunnel, a spillway tunnel and a shaft type spillway tunnel as claimed in claim 2, wherein: the flood discharge tunnel water inlet is provided with an annular thin-wall weir, and at least one barrier is arranged at the top of the annular thin-wall weir.
4. A spillway structure incorporating a diversion tunnel, a vent and a shaft type spillway tunnel as claimed in claim 3, wherein: and a vertical shaft vent hole is commonly arranged in the water inlet of the flood discharging hole, the vertical shaft structure and the vertical shaft pressure slope section, one end of the vertical shaft vent hole is communicated with the water withdrawal hole, and the other end of the vertical shaft vent hole extends to the top surface of the barrier.
5. The spillway structure combining a diversion tunnel, a spillway tunnel and a shaft type spillway tunnel as claimed in claim 1, wherein: the diversion and relief hole comprises a diversion and relief hole water inlet, an upstream hole body section, a maintenance gate well, an arc gate working section and a downstream chute section which are sequentially communicated along the water flow direction;
the overhaul gate is arranged in the overhaul gate well; the arc gate working section is internally provided with an arc gate which can be used for controlling the flow of water flow.
6. The spillway structure of claim 5 in combination with a diversion tunnel, a vent hole, and a shaft type spillway tunnel, wherein: the arc door working section comprises a gradual change section, a slope pressing section, an arc door cavity and a parabolic section which are sequentially communicated along the water flow direction;
the arc gate is arranged in the arc gate cavity, an arc gate control chamber is arranged above the arc gate cavity, and the arc gate control chamber is communicated with the ground through a control chamber traffic hole.
7. The spillway structure of combining a diversion tunnel, a spillway tunnel, and a shaft type spillway tunnel of claim 6, wherein: the horizontal length of the gradual change section is required to be more than 1.5 times of the width of the upstream tunnel body section.
8. The spillway structure of combining a diversion tunnel, a spillway tunnel, and a shaft type spillway tunnel of claim 6, wherein: the lower part of the bottom plate of the radial gate of the arc gate chamber is provided with a drop ridge, the lower part of the drop ridge is transited to the downstream chute section through the bottom plate of the parabolic section, and the bottom plate of the parabolic section adopts y= -ax 2 A > 0; if the slope of the downstream chute section is i, the horizontal length of the parabolic section satisfies l=i/(2 a).
9. The spillway structure of combining a diversion tunnel, a spillway tunnel, and a shaft type spillway tunnel of claim 6, wherein: and working arc door ventilation holes which are communicated with the arc door cavity and the top of the overhaul gate well are formed in the overhaul gate well, the gradual change section and the pressure slope section.
10. The spillway structure combining a diversion tunnel, a spillway tunnel, and a shaft type spillway tunnel of claim 9, wherein: the horizontal section of the ventilation hole of the working arc door is upward inclined by an angle of 5-10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310945324.1A CN117513260A (en) | 2023-07-28 | 2023-07-28 | Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310945324.1A CN117513260A (en) | 2023-07-28 | 2023-07-28 | Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN117513260A true CN117513260A (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310945324.1A Pending CN117513260A (en) | 2023-07-28 | 2023-07-28 | Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel |
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| CN (1) | CN117513260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117947800A (en) * | 2024-03-27 | 2024-04-30 | 中国电建集团西北勘测设计研究院有限公司 | High-steep slope subtableland drainage system |
-
2023
- 2023-07-28 CN CN202310945324.1A patent/CN117513260A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117947800A (en) * | 2024-03-27 | 2024-04-30 | 中国电建集团西北勘测设计研究院有限公司 | High-steep slope subtableland drainage system |
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