CN212316853U - Low-water-head river-blocking gate dam sediment outflow system - Google Patents
Low-water-head river-blocking gate dam sediment outflow system Download PDFInfo
- Publication number
- CN212316853U CN212316853U CN202021474460.5U CN202021474460U CN212316853U CN 212316853 U CN212316853 U CN 212316853U CN 202021474460 U CN202021474460 U CN 202021474460U CN 212316853 U CN212316853 U CN 212316853U
- Authority
- CN
- China
- Prior art keywords
- dam
- sediment outflow
- river
- sand
- sediment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Barrages (AREA)
Abstract
The utility model provides a low water head blocks a river floodgate dam sediment outflow system, including the sediment outflow corridor, the sediment outflow corridor includes riverbed sediment outflow corridor and bank sediment outflow corridor, and riverbed sediment outflow corridor sets up the upper reaches at the block dam, is equipped with the apron on the riverbed sediment outflow corridor, is equipped with a plurality of sand washing holes on the apron, is equipped with the control gate on the bank sediment outflow corridor. The system realizes the non-pressure flow sand discharge of the sand discharge gallery, enlarges the sand discharge range of the sand discharge system and improves the sand discharge effect.
Description
Technical Field
The utility model belongs to hydraulic and hydroelectric engineering arranges husky field, in particular to low head blocks a river floodgate dam and arranges husky system, is particularly suitable for the great many silt rivers of collection rain area.
Background
People build gate dam projects by fully utilizing water resources in order to intercept surface runoff, and most of the problems of silt deposition are caused, such as the rise of upstream riverbeds, the deposition of diversion canals and the like; if proper sand-discharging measures are not taken, the method has adverse effects on the society and the environment. The traditional sand discharge system usually adopts sand discharge measures near a gate dam water intake to prevent a large amount of silt from entering a river-blocking gate dam water diversion system.
The riverbed sand discharge gallery of the traditional sand discharge system has the defects that the closer to the bank sand discharge gallery, the stronger the sand flushing hole sand discharge capacity is, and the farther from the bank sand discharge gallery, the weaker the sand flushing hole sand discharge capacity is, and the traditional sand discharge system with the pressure flow has poor sand carrying capacity due to stable flow state. The traditional sand discharge system neglects that the sediment is a building material and is a natural resource. Therefore, the traditional sand discharge system has the problems of small sand discharge range, insufficient sand carrying capacity of the gallery, non-collection of discharged sediment and the like.
Disclosure of Invention
The technical problem that this novel will solve provides a low water head blocks a river floodgate dam sediment outflow system, realizes sediment outflow corridor no-pressure flow sediment outflow, enlarges sediment outflow system's sediment outflow scope, improves sediment outflow effect.
In order to solve the technical problem, the novel low-water-head river-blocking gate dam sand discharge system comprises a sand discharge gallery, wherein the sand discharge gallery comprises a riverbed sand discharge gallery and a shoreside sand discharge gallery, the riverbed sand discharge gallery is arranged at the upstream of the river-blocking gate dam, a cover plate is arranged on the riverbed sand discharge gallery, a plurality of sand flushing holes are formed in the cover plate, and a control gate is arranged on the shoreside sand discharge gallery.
In the preferred scheme, the river sluice dam comprises a river sluice dam bottom plate arranged on a river channel, the two sides of the river sluice dam bottom plate are provided with river sluice dam wing walls, and a river sluice dam gate is arranged between the river sluice dam wing walls.
In a further scheme, the riverbed sand discharge gallery is arranged on a bottom plate of the river blocking dam.
In the preferred scheme, the top elevation of the riverbed sediment ejection gallery is lower than the top elevation of a bottom plate of the river sluice dam, and a sediment trap is formed on the bottom plate at the upstream of the river sluice dam.
In the preferred scheme, the sum of the overflowing capacity of the sand flushing holes is smaller than the overflowing capacity of the sand discharge gallery.
In a preferred scheme, the top and the hole wall of the sand flushing hole are provided with impingement plates.
In a preferable scheme, a base plate is arranged at the bottom of the riverbed sand draining gallery.
In the preferred scheme, the shore sand discharge gallery is communicated with a sand basin.
The utility model provides a pair of low head sluice dam sediment outflow system has following beneficial effect:
1. the size and the interval of the sand flushing holes, the size of the sand discharging gallery and the bottom slope are adjusted to ensure that the overflowing capacity of the sand discharging gallery is greater than the sum of the overflowing capacities of the sand flushing holes, the water surface line of the sand discharging gallery is lower than the bottom elevation of the cover plate in the sand discharging process, each sand flushing hole freely flows out, the pressure head at each sand flushing hole is the difference between the water surface elevation of the river retaining gate dam and the bottom elevation of the cover plate of the sand discharging gallery at the riverbed section, and each sand flushing hole has the same sand flushing capacity; the defects that the closer the sand flushing hole is to the bank side sand discharging gallery, the stronger the sand flushing hole is, and the farther the sand flushing hole is from the bank side sand discharging gallery, the weaker the sand flushing hole is, which are caused by the pressure flow sand discharging of the riverbed section sand discharging gallery in the traditional scheme, are overcome, and the problem that the gallery has poor sand entrainment capacity due to stable flow state of the pressure flow sand discharging is also solved.
2. The end of the sand discharge gallery is provided with the sand sedimentation tank, the discharged silt can be collected and washed, and the washed silt can be sold as a building material, so that the sand sedimentation tank has certain economic benefit.
3. The top elevation of the riverbed sediment ejection gallery is lower than the top elevation of the bottom plate of the river sluice dam, and a sediment retaining bank is formed on the bottom plate at the upstream of the river sluice dam, so that a large amount of sediment can be deposited in front of the bottom plate of the river sluice dam, and the sediment ejection amount of the sediment ejection system can be effectively increased.
4. Through setting up dash board and backing plate, carry out the scour protection to the bottom of sand washing hole and the riverbed sediment outflow corridor, prevent to wash the damage problem of sand washing hole and the riverbed sediment outflow corridor bottom that arouse because of the flow state is unstable.
5. The end of the sand discharge gallery is provided with the sand sedimentation tank, the discharged silt can be collected and washed, and the washed silt can be sold as a building material, so that the sand sedimentation tank has certain economic benefit.
Drawings
The invention is further illustrated by the following figures and examples:
FIG. 1 is a top plan view of the present invention;
FIG. 2 is a schematic cross-sectional view of a riverbed sand drainage gallery;
FIG. 3 is a schematic longitudinal section of a riverbed sand discharge gallery;
FIG. 4 is a plan view of the sand wash hole;
FIG. 5 is a sectional view of a sand wash hole;
in the figure: the river sluice dam comprises a river sluice dam 1, a sand discharge gallery 2, a desilting basin 3, a bottom plate 101 of the river sluice dam, a wing wall 102 of the river sluice dam, a gate 103 of the river sluice dam, a riverbed sand discharge gallery 201, a bank sand discharge gallery 202, a cover plate 203, a sand flushing hole 204, a control gate 205, a baffle 206 and a backing plate 207.
Detailed Description
As shown in fig. 1-3, a low-water-head sluice gate sand discharge system comprises a sand discharge gallery 2, wherein the sand discharge gallery 2 comprises a riverbed sand discharge gallery 201 and a shoreside sand discharge gallery 202, the riverbed sand discharge gallery 201 is arranged at the upstream of the sluice gate dam 1, a cover plate 203 is arranged on the riverbed sand discharge gallery 201, a plurality of sand flushing holes 204 are arranged on the cover plate 203, and a control gate 205 is arranged on the shoreside sand discharge gallery 202.
The river sluice dam 1 comprises a river sluice dam bottom plate 101 arranged on a river channel, river sluice dam wing walls 102 are arranged on two sides of the river sluice dam bottom plate 101, and river sluice dam gates 103 are arranged between the river sluice dam wing walls 102.
The riverbed sand discharge gallery 201 is arranged on the bottom plate 101 of the river sluice dam.
The riverbed sediment ejection gallery 201 may be provided on the upstream side of the bottom plate 101 of the river sluice dam separately from the bottom plate 101 of the river sluice dam.
As shown in fig. 2, the top elevation of the riverbed sediment ejection gallery 201 is lower than the top elevation of the bottom plate 101 of the river lock dam to form a sediment trap. Through setting up the sediment trapping bank, be favorable to a large amount of silt to siltation before river-blocking dam bottom plate, can effectively improve sediment outflow system's sediment outflow.
During implementation, the size and the interval of the sand flushing holes 204 are firstly drawn up, the sum of the sand discharging capacity of a single sand flushing hole and the sand discharging capacity of all the sand flushing holes is calculated, the section size and the bottom slope of the sand discharging gallery are drawn up, the overflowing capacity of the sand discharging gallery is calculated, the overflowing capacity of the sand discharging gallery is larger than the sum of the overflowing capacities of the set sand flushing holes by adjusting the parameters, and the size and the interval of the sand flushing holes and the section size and the bottom slope of the sand discharging gallery are finally determined. Because the overflowing capacity of the sand discharge gallery 2 is greater than the sum of the overflowing capacities of the sand flushing holes 204, the water surface line of the sand discharge gallery is lower than the bottom elevation of the cover plate 203 in the sand discharge process, as shown in fig. 3, no-press flow sand discharge exists in the sand discharge gallery 2, and the sand discharge working condition that the traditional sand discharge gallery has press flow sand discharge is changed.
Under the working condition of no-pressure-flow sand discharge of the sand discharge gallery, each sand flushing hole 204 freely outflows, and the pressure water head at each sand flushing hole 204 is the difference between the water surface elevation of the barrage dam and the bottom elevation of the cover plate 203 of the sand discharge gallery of the riverbed section, so that each sand flushing hole 204 has the same sand flushing capacity; the defects that the closer the sand flushing hole is to the bank side sand discharging gallery, the stronger the sand flushing hole is, and the farther the sand flushing hole is from the bank side sand discharging gallery, the weaker the sand flushing hole is, which are caused by the pressure flow sand discharging of the riverbed section sand discharging gallery in the traditional scheme, are overcome, and the problem that the gallery has poor sand entrainment capacity due to stable flow state of the pressure flow sand discharging is also solved.
Preferably, the top and the wall of the sand flushing hole 204 are provided with impingement plates 206.
The bottom of the riverbed sand discharge gallery 201 is provided with a backing plate 207.
By arranging the impingement plate 206 and the backing plate 207, the problem that the bottom of the sand flushing hole 204 and the bottom of the riverbed sand discharge gallery 201 are flushed and damaged due to unstable flow state can be solved.
Preferably, the shore sand discharge corridor 202 is communicated with the desilting basin 3. The desilting pond 3 is arranged at the tail end of the sand discharge gallery, the discharged silt can be collected and washed, and the washed silt can be sold as a building material, so that certain economic benefits are achieved.
A sand discharge method of a sand discharge system of a low water head river dam comprises the following steps:
step one, closing a gate 103 of the river sluice dam to block a high water level, reducing the flow velocity of water flow upstream of the river sluice dam 1, and depositing a large amount of silt at the upstream of the river sluice dam 1;
step two, when silt at the upstream of the river sluice dam 1 is deposited to the top elevation of a bottom plate 101 of the river sluice dam, opening a control gate 205, and under the action of water pressure, enabling silt-containing water to flow through a silt-flushing hole 204 and a sand-discharging gallery 2 to a desilting basin 3;
step three, after the silt near the sand flushing hole 204 at the upstream of the river sluice dam is discharged, clear water is discharged from the sand discharging gallery 2 to flush the silt in the desilting basin 3;
and step four, after the sediment in the sand basin 3 is washed, closing the control gate 205 and finishing the sand discharge.
Claims (8)
1. The utility model provides a low head water block river sluice dam sediment outflow system, its characterized in that, includes sediment outflow corridor (2), sediment outflow corridor (2) are including riverbed sediment outflow corridor (201) and bank sediment outflow corridor (202), and riverbed sediment outflow corridor (201) set up the upper reaches at block river sluice dam (1), are equipped with apron (203) on riverbed sediment outflow corridor (201), are equipped with a plurality of sand flushing holes (204) on apron (203), are equipped with control gate (205) on bank sediment outflow corridor (202).
2. The low head river dam sediment outflow system of claim 1, wherein the river dam (1) comprises a river dam base plate (101) disposed on a river, wherein river dam wing walls (102) are disposed on both sides of the river dam base plate (101), and a river dam gate (103) is disposed between the river dam wing walls (102).
3. A low head sluice dam sediment outflow system as claimed in claim 2 wherein the bed sediment outflow galleries (201) are provided on the bottom floor (101) of the sluice dam.
4. A low head river gate dam sediment disposal system as claimed in claim 2 wherein the bed sediment disposal corridor (201) has a ceiling elevation below the ceiling elevation of the bottom plate (101) of the river gate dam forming a sediment trap upstream of the river gate dam.
5. A low head sluice dam sediment outflow system as claimed in claim 1, wherein the sum of the flow capacities of the sand washout holes (204) is less than the flow capacity of the sediment outflow gallery (2).
6. A low head sluicegate dam sediment disposal system as claimed in claim 1 wherein the top and walls of the sand washout openings (204) are provided with baffles (206).
7. A low head sluice dam sediment outflow system as claimed in claim 1 wherein a backing plate (207) is provided at the bottom of the riverbed sediment outflow gallery (201).
8. A low head sluice dam sediment outflow system as claimed in claim 1, wherein the shore sediment outflow corridor (202) communicates with the desilting basin (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021474460.5U CN212316853U (en) | 2020-07-23 | 2020-07-23 | Low-water-head river-blocking gate dam sediment outflow system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021474460.5U CN212316853U (en) | 2020-07-23 | 2020-07-23 | Low-water-head river-blocking gate dam sediment outflow system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212316853U true CN212316853U (en) | 2021-01-08 |
Family
ID=74035843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021474460.5U Active CN212316853U (en) | 2020-07-23 | 2020-07-23 | Low-water-head river-blocking gate dam sediment outflow system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212316853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197411A (en) * | 2021-12-14 | 2022-03-18 | 江苏省水利勘测设计研究院有限公司 | Water conservancy water and electricity sand washing system |
-
2020
- 2020-07-23 CN CN202021474460.5U patent/CN212316853U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197411A (en) * | 2021-12-14 | 2022-03-18 | 江苏省水利勘测设计研究院有限公司 | Water conservancy water and electricity sand washing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204543723U (en) | The suspended movable filter putting silt | |
| CN210645245U (en) | Flushable sand settling system | |
| CN108842716B (en) | Device for continuously removing sediment in water storage area in all-dimensional and permanent manner | |
| CN212316853U (en) | Low-water-head river-blocking gate dam sediment outflow system | |
| CN111778937A (en) | Low-water-head river-blocking dam sand discharge system and sand discharge method thereof | |
| CN212956434U (en) | Water sluicegate | |
| CN103882839A (en) | Sediment releasing system for water intake of low-head river channel pivotal power station | |
| CN206693187U (en) | A kind of spillway structure | |
| CN113202065A (en) | Water taking structure for multi-silt river channel | |
| CN206706699U (en) | Ramp type sand surfing structure | |
| CN100465381C (en) | Sand-drainage construction system for diversion channel | |
| CN209025056U (en) | A kind of Floater removing gate and scouring sluice integrated structure | |
| CN202214710U (en) | Overflowing-drainage integrated brake weir | |
| CN101165277B (en) | Reservoir dredging method | |
| CN213538900U (en) | Desilting and sand-discharging device for steel dam | |
| CN211690240U (en) | Bottom flow energy dissipation structure for small-opening discharge of gate dam | |
| CN112681218B (en) | Forward and reverse scouring dredging method for diversion channel of hydropower station and diversion channel structure | |
| CN220433802U (en) | Water taking structure in hydraulic engineering | |
| CN210562057U (en) | Riverbed water intake structure for forward water taking of hydropower station | |
| CN211665715U (en) | High-low dam and water taking structure | |
| CN112982274A (en) | Desilting method for restoring reservoir sediment storage capacity by utilizing daily incoming water | |
| CN213580525U (en) | Water flow control system for underwater self-compacting concrete test | |
| CN107434301B (en) | Vegetation filters slot | |
| CN211113526U (en) | Sand blocking and discharging device suitable for water conservancy system | |
| CN217128051U (en) | Storage box culvert system coupled with road space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |