CN107268519B - A kind of tidal reach tributary inlet door dike header structure - Google Patents
A kind of tidal reach tributary inlet door dike header structure Download PDFInfo
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- CN107268519B CN107268519B CN201710457314.8A CN201710457314A CN107268519B CN 107268519 B CN107268519 B CN 107268519B CN 201710457314 A CN201710457314 A CN 201710457314A CN 107268519 B CN107268519 B CN 107268519B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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Abstract
The present invention relates to a kind of tidal reach tributary inlet door dike header structures.The dike header structure that the present invention designs is stepped construction, including dike head platform and dike head slope；The dike head platform includes dike head superior platforms and Di Tou subordinates platform, and dike head superior platforms are connected between Di Tou subordinates platforms by the first dike head slope, and Di Tou subordinates platform extends to riverbed by the second dike head slope；The dike head superior platforms and Di Tou subordinates platform upstream face are in arc-shaped, and the two-end-point of dike head superior platforms circular arc is located on irrigation channel bunding and main bank levee, and the two-end-point of Di Tou subordinates platform circular arc is separately connected irrigation channel bunding and main bank levee.The dike header structure of the present invention can enable tidal reach tributary inlet door flow when flood tide diversion and ebb tide drain smooth out shunting.
Description
Technical field
The present invention relates to hydraulic engineering fields, and in particular to a kind of tidal reach tributary inlet door dike header structure.
Background technology
Distribution of water resources is uneven and water quality deterioration causes water problems to protrude so that it is very tight to implement Inter-Basin Water Transfer Project
Compel.In Inter-Basin Water Transfer Project, tidal reach water level flow velocity real-time change, rise duration of fall asymmetry, especially land use
When hinge is closer from main stem under confined condition, irrigation channel entrance erea flow is by main stem fluctuation tide restraining function, water flow problems
It is complicated.
Under flood tide diversion situation, acted on into irrigation channel flow by dike choicest stream, current top-lashed action to opposite bank side bulkhead wall, a side
Face causes river bank scouring, on the other hand influences ship navigation；And under ebb tide draining situation, into main stem flow by dike choicest
Top rushes mainstream after stream, and subsequent larger angle repulses or subdue the enemy steering, downstream advances, and not only results in dike head downstream in this way and occurs on a large scale
Region is deposited, and can also be changed river regime, be influenced bank stability.
At present reinforcement bank slope is generally for the measure that problems are taken generally in the design of irrigation channel and hinge
Protection, reduction are washed away, and carry out regular dredging simultaneously for region of depositing at mouth door, these measures do not only result in cost increase and nothing
Method tackles the problem at its root.In addition, main stem flow by irrigation channel due to being drained current top-lashed action, flow condition will change
River regime to be unfavorable for the section is stablized.In consideration of it, the present invention provides a kind of tidal reach tributary inlet door dike header structure, to
It solves the above problems.
Invention content
The purpose of the present invention is exactly of the existing technology in order to solve the problems, such as, provides a kind of tidal reach tributary inlet door dike
When by opening up irrigation channel, improvement design is carried out in the dike header structure that irrigation channel and main interchannel are formed for header structure, make flood tide diversion and
Flow can smooth out shunting when ebb tide drains, to tackle the problem at its root.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of tidal reach tributary inlet door dike header structure, the dike header structure are the master when opening up irrigation channel on main bank levee
A segment structure is formed between bank levee and irrigation channel bunding；
The dike header structure is designed as stepped construction, including dike head platform and dike head slope；
The dike head platform includes dike head superior platforms and Di Tou subordinates platform, dike head superior platforms and Di Tou subordinates platform
Between connected by the first dike head slope, Di Tou subordinates platform extends to riverbed by the second dike head slope；
The dike head superior platforms and Di Tou subordinates platform upstream face are in arc-shaped, the two-end-point of dike head superior platforms circular arc
It is located on irrigation channel bunding and main bank levee, the two-end-point of Di Tou subordinates platform circular arc is separately connected irrigation channel bunding and main riverbank
Dike.
As a further improvement on the present invention, the dike head superior platforms elevation is identical as irrigation channel bunding elevation, the dike
The elevation of head subordinate platform is identical as water level in main stem.Water level can be acquired by neighbouring survey station data in main stem.
The gradient of the irrigation channel bunding, the first dike head slope and the second dike head slope is according to the slope design of main bank levee；
The ranging from entire dike head superior platforms arc section of the slope on the first dike head slope；The ranging from entire dike of slope on the second dike head slope
Head subordinate platform arc section.
Preferably, the two-end-point of the dike head superior platforms circular arc is located on irrigation channel bunding and main bank levee, and
With irrigation channel and main river joint distance 100m~300m, two-end-point and joint distance are too close, dike head discharge area when flood level
It is too small, water drain stream is cannot be satisfied by upper step platform, and the effect of shunting is not achieved；If apart from too far, land area is excessive,
Cost is excessively high, can adjust distance according to practical streamflow regime.
The two-end-point of the Di Tou subordinates platform circular arc is separately connected irrigation channel bunding and main bank levee, Di Tou subordinates platform circle
The center of circle corresponding to the center of circle corresponding to arc and dike head superior platforms circular arc is at a distance of 50~200m.Middle water level is taken to establish Di Tou subordinates platform
And 50~200m of extension is because when ebb tide diversion, flow first push up to rush to downstream side dike head and then be repulsed or subdue the enemy into irrigation channel road, dike head
Shunting function is played, and diversion occurs generally in, when low water level, thus while dike head superior platforms are compared with run-of-bank gravel line in the present invention
It is stepped back, but Di Tou subordinates platform maintains run-of-bank gravel line substantially, does not change original bed configuration and water stream situation,
The smooth-going shunting and river regime for being conducive to ebb tide diversion are stablized, and extension distance can be designed according to practical streamflow regime.
As a further improvement on the present invention, the irrigation channel opened up, dike head angle are determined using following formula：
The dike head angle is the angle between main bank levee and irrigation channel bunding；
Wherein, TF is duration of rise, and TE is duration of fall；Duration of rise and duration of fall are by acquiring river section hydrology data
Analysis obtains.The size of angle can influence dike head discharge area, and be had an impact to the effect for improving fluidised form.
Preferably, it is preferably to improve flow condition, above-mentioned dike head angle is further improved, near irrigation channel
The dike head angle in the natural tributary of main stem is modified dike head angle；Concrete mode is as follows：
Measure duration of rise T at the dike head angle β in the natural tributary of main stem near irrigation channel, and natural tributarygAnd ebb tide
Last Th；It is using correction formula：
Natural tributary is moulded naturally under the conditions of long-term fluctuation tide power and silt, mutual for local hydrodynamic force and silt
Effect and adapt to as a result, its dike head angle optimum water stream and river regime are stablized, repaiied using the angle β of natural back levee head
Long-term the stablizing of the irrigation channel dike head angle theta just crossed, more conducively pivot function is realized.
The present invention's carries out improvement design by the dike header structure formed between irrigation channel bunding and main bank levee, and flood tide is made to draw
Flow can smooth out shunting when water and ebb tide drain, and dike header structure of the invention uses stepped-style structure, in flood tide diversion feelings
Under shape, flow repulses or subdue the enemy to turn to be reduced into irrigation channel angle so that flow can be more gentle enters irrigation channel, reduces current top-lashed action
The trend of left bank reduces flow and is washed away to riverbank, while reducing pilotage road junction door crossing current flow velocity, more conducively opens the navigation or air flight；
Ebb tide drains under situation, and dike head superior platforms pass through between Di Tou subordinates platform for flow, reduce the main river of current top-lashed action
The intensity of road mainstream improves the area of slack water in dike head downstream, reduces sediment siltation, while can comply with script flow situation,
Keep bank stability.
Description of the drawings
Fig. 1 is the dike header structure schematic top plan view of the present invention.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but not as the present invention's
It limits.
Embodiment 1
Now by taking the design process for dredging engineering circles board key water control project is opened up in new Meng He extensions as an example, to tidal reach of the present invention
The specific implementation mode of tributary inlet door dike header structure is described further.Boundary's board hinge, which is located at, raises the new Meng of the right branch of a river in middle section peace continent
River mouth Men Chu, hinge is integrally oblique to enter big Jiajiang.Hinge has both check gate, a total installed capacity by a lock hole beam overall 90m
Flow is 300m3The two-way pump station of/s and VI grade of ship lock are arranged side by side, building axis distance river about 700m.Its
Middle sluice gate station is arranged in eastern bank, and ship lock is arranged in west bank, and check gate center line is overlapped with the new rivers Meng He center line, ship
Lock center line is arranged with check gate center line, pumping plant centerline parallel.Section is raised to be located within tidal current limit varied sections, it is upper to rise
Wufeng Mount based on runoff effect, while also having fluctuation damp, belong to tidal reach down toward boundary river mouthful range.
As shown in Figure 1, the dike header structure is as shown in Figure 1, it is designed as stepped construction, including dike head platform and dike head
Slope；
The dike head platform includes dike head superior platforms 1 and Di Tou subordinates platform 2, dike head superior platforms 1 and Di Tou subordinates
It is connected by the first dike head slope 31 between platform 2, Di Tou subordinates platform 2 extends to riverbed by the second dike head slope 32；
The dike head superior platforms 1 and 2 upstream face of Di Tou subordinates platform are in arc-shaped, and the two of 1 circular arc of dike head superior platforms
Endpoint is located on irrigation channel bunding 5 and main bank levee 4, and the two-end-point of 2 circular arc of Di Tou subordinates platform is separately connected irrigation channel bunding 5
And main bank levee 4.
In the present embodiment, main riverbank crest elevation of levee is 10m, and middle water level is 4m, thereby determines that dike head superior platforms 1 and dike head
The elevation of subordinate's platform 2；The gradient of irrigation channel bunding 5, the first dike head slope 31 and the second dike head slope 32 is according to main bank levee
Slope design, ranging from entire 1 arc section of dike head superior platforms of slope on the first dike head slope 31；It puts on the second dike head slope 32
Ranging from entire 2 arc section of Di Tou subordinates platform in slope, the two-end-point of dike head superior platforms circular arc are located at irrigation channel bunding and master
On bank levee, and with irrigation channel and 100~300m of main river joint distance；The two-end-point of 2 circular arc of Di Tou subordinates platform connects respectively
Connect irrigation channel bunding 5 and main bank levee 4, circle corresponding to 1 circular arc of the center of circle and dike head superior platforms corresponding to 2 circular arc of Di Tou subordinates platform
The heart is at a distance of 50~200m.
In the present embodiment, dike head angle is determined using following formula：
Wherein, TF is duration of rise, and TE is duration of fall；Duration of rise and duration of fall are by acquiring river section hydrology data
Analysis obtains.Middle section is raised for the present embodiment, is located within tidal current limit varied sections, based on runoff effect, while also
It is the typical tidal reach of THE LOWER YANGTZE VALLEY by tidal effect.It is surveyed according in March, 2006, in May, 2009 and the hydrology of in August, 2007
Test, the right big Jiajiang Project Areas of the branch of a river nearby in, low water when, duration of rise 3.85h, duration of fall 8.15h, calculation formula is specifically such as
Under：
Then dike head angle should take 57.8 °, at an acute angle, can improve irrigation channel mouth door fluidised form, reflexion and scour flow is made more to smooth out.
Embodiment 2
In the present embodiment, dike head angle is modified according to the dike head angle in the natural tributary of main stem near irrigation channel；Tool
Body mode is as follows：
Measure duration of rise T at the dike head angle β in the natural tributary of main stem near irrigation channel, and natural tributarygAnd ebb tide
Last Th；It is using correction formula：
It opens up to dredge at engineering circles board key water control project downstream about 600m in new Meng He extensions and has the small Jiajiang in natural tributary, measure small folder
Dike head angle β=53.4 ° in river downstream side, duration of rise is 3.65h, duration of fall 8.35h at small Jiajiang, then draws after correcting
Dike head angle theta=56.3 ° in river.Angle design after being corrected, is more in line with flow nature evolution characteristic, while also taking into account
The stability that dry river develops, preferably improves flow-shape.
Claims (8)
1. a kind of tidal reach tributary inlet door dike header structure, which is characterized in that the dike header structure is designed as stepped construction, packet
Include dike head platform and dike head slope；
The dike head platform includes dike head superior platforms and Di Tou subordinates platform, is led between dike head superior platforms and Di Tou subordinates platform
The connection of the first dike head slope is crossed, Di Tou subordinates platform extends to riverbed by the second dike head slope；
The dike head superior platforms and Di Tou subordinates platform upstream face are in arc-shaped, and the two-end-point of dike head superior platforms circular arc is distinguished
On irrigation channel bunding and main bank levee, the two-end-point of Di Tou subordinates platform circular arc is separately connected irrigation channel bunding and main bank levee.
2. dike header structure according to claim 1, which is characterized in that the dike head superior platforms elevation is high with irrigation channel bunding
The elevation of Cheng Xiangtong, Di Tou subordinates platform are identical as water level in main stem.
3. dike header structure according to claim 1, which is characterized in that the irrigation channel bunding, the first dike head slope and second
The gradient on dike head slope is according to the slope design of main bank levee.
4. dike header structure according to claim 1 or 3, which is characterized in that the slope on the first dike head slope is ranging from entire
Dike head superior platforms arc section；The ranging from entire Di Tou subordinates platform arc section of the slope on the second dike head slope.
5. dike header structure according to claim 1, which is characterized in that the two-end-point of the dike head superior platforms circular arc is distinguished
100~300m of joint on irrigation channel bunding and main bank levee, and apart from irrigation channel Yu main river.
6. dike header structure according to claim 1, which is characterized in that the two-end-point of the Di Tou subordinates platform circular arc is distinguished
Connect irrigation channel bunding and main bank levee, the center of circle corresponding to the center of circle and dike head superior platforms circular arc corresponding to Di Tou subordinates platform circular arc
At a distance of 50~200m.
7. dike header structure according to claim 1, which is characterized in that dike head angle is determined using following formula：
The dike head angle is the angle between main bank levee and irrigation channel bunding；
Wherein, TF is duration of rise, and TE is duration of fall；Duration of rise and duration of fall are by acquiring river section hydrology analysis
It obtains.
8. dike header structure according to claim 7, which is characterized in that according to the dike in the natural tributary of main stem near irrigation channel
Head angle is modified irrigation channel dike head angle；Concrete mode is as follows：
Measure duration of rise T at the dike head angle β in natural tributary, and natural tributarygWith duration of fall Th；Use correction formula
For：
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| CN201710457314.8A CN107268519B (en) | 2017-06-16 | 2017-06-16 | A kind of tidal reach tributary inlet door dike header structure |
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| CN201710457314.8A CN107268519B (en) | 2017-06-16 | 2017-06-16 | A kind of tidal reach tributary inlet door dike header structure |
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| DE3707074C1 (en) * | 1987-03-05 | 1988-06-01 | Hermann Dr-Ing Christiansen | Device for flowing water, with a side branch or extension |
| CN102191759B (en) * | 2011-04-20 | 2013-06-05 | 河海大学 | Novel breakwater and design method thereof |
| CN204662344U (en) * | 2015-03-25 | 2015-09-23 | 广东省水利水电科学研究院 | The anti-silting system of a kind of convex bank diversion |
| CN106759168A (en) * | 2017-01-18 | 2017-05-31 | 中国电建集团北京勘测设计研究院有限公司 | A kind of generating water diverting structure arrangement for taking into account environmental protection and sand discharge demand |
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