CN109610355B - A kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow uniform method - Google Patents
A kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow uniform method Download PDFInfo
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- CN109610355B CN109610355B CN201910042311.7A CN201910042311A CN109610355B CN 109610355 B CN109610355 B CN 109610355B CN 201910042311 A CN201910042311 A CN 201910042311A CN 109610355 B CN109610355 B CN 109610355B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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Abstract
The invention discloses a kind of guarantee urban rainwater pumping plant expansion type water outlet box culverts to go out to flow uniform method, and the multiple rectification measure of the convex bank of " > " shape, the double-deck crossbeam and combined type diversion pier of " > " shape is arranged in the water outlet box culvert of urban rainwater pumping plant expansion type.The present invention concentrates influent stream tentatively to be rectified water outlet box culvert entrance using the convex bank of " > " shape, further by the double-deck crossbeam of " > " shape and combined type diversion pier, the rectified diffusion in vertical and horizontal direction acts on water flow respectively, realize the homo-effect to expansion type water outlet box culvert water discharge speed distribution, the water outlet fluidised form for facilitating the water outlet box culvert of improvement expansion type, for ensureing that urban rainwater pumping plant goes out to flow uniformity with important engineering application value.Multiple rectification measure structure of the present invention is simple, is easy construction makes, rectification effect is significant, suitable for promoting the use of in the design of the urban rainwater pump station engineering with expansion type water outlet box culvert, transformation.
Description
Technical field
The invention belongs to municipal rainfall pumping station field of engineering technology, and in particular to a kind of guarantee urban rainwater pumping plant expansion type
Water outlet box culvert, which goes out, flows uniform method.
Background technique
In recent years, with the continuous acceleration of Urbanization in China, urban flood defence requires higher and higher.As urban flood defence
Important composition in system, rainfall pumping station is for solving the problems, such as that urban waterlogging plays key effect and attracts attention.Water tank
Culvert is that urban rainwater pumping plant commonly goes out water buildings, often nervous by city planning earth, excretion rainwater excess water flow greatly with
And design and need to meet the restrictive conditions such as linking river navigation requirement, and sudden expansion structural style is often used, to reduce water outlet
The water velocity of box culvert outlet.But mainstream is easy to produce when especially its angle of flare is larger for expansion type water outlet box culvert
Between two parties, the bad fluidised form such as bias current, reflux, vortex can not only cause local sediment siltation in biggish hydraulic loss and box culvert to be asked
Topic, can also have box culvert exit velocity and be unevenly distributed, and seriously affect safe and stable operation and the linking river of urban rainwater pumping plant
Navigation safety in road.
Summary of the invention
The purpose of the present invention is in view of the above-mentioned problems, proposing that a kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow
Uniform method.
To achieve the purpose of the present invention, it adopts the following technical scheme that
A kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow uniform method, and urban rainwater pumping plant is discharged box culvert
It is in expansion type along main flow direction, the import of expansion type water outlet box culvert is communicated with the wet well of urban rainwater pumping plant, exported and the external world
River is connected, and the convex bank of " > " shape, the double-deck crossbeam and combined type diversion pier of " > " shape, the convex are arranged in water outlet box culvert
Bank concentrates influent stream to be rectified water outlet box culvert entrance and spreads it tentatively, the bilayer crossbeam and combined type diversion pier
Preliminary divergent flow is further rectified in vertical and horizontal direction respectively, multiple rectification measure realizes that expansion type is discharged box culvert
Water discharge speed is distributed homo-effect, helps to improve the water outlet fluidised form of expansion type water outlet box culvert and ensures that urban rainwater pumping plant goes out to flow
Uniformity；
The length of the water outlet box culvert is L, entrance width W, is highly H, angle of flare θ；
The convex bank includes main bank and secondary bank, if applicant, which passes through the value analog study of dry test sum number, obtains the convex of " > " shape
The value range that shape bank rectified action works well, width D 1=(0.05~0.15) W of convex bank, width D 1 is too small to be difficult to protect
Demonstrate,proving its structural strength, D1 then will increase greatly very much cost of manufacture, and the main bank is discharged box culvert center in " > " shape shape and along expansion type
Line is arranged symmetrically to play balanced rectified action effect, main bank height H1=(0.1~0.25) H, the main too big shadow of bank height H1
Ring that its structural strength and rectification effect, H1 are too small to be will cause through-flow unsmooth, main bank side connects with water outlet box culvert side wall, and leads
Angle β=70 °~110 ° between bank and water outlet box culvert side wall, angle β is too small or carries out to the influent stream of water outlet box culvert greatly very much whole
The function and effect of stream are not significant, main bank central point A and the water outlet too small meeting of box culvert import distance L1=(0.1~0.3) L, spacing L1
Cause that parthydraulic loss is excessive, it is bad to will lead to very much rectification effect greatly, the pair bank is arranged at intervals at the top of main bank and along going out
Water tank contains center line two sides and a pair is respectively arranged, and unilateral pairs of secondary bank is arranged symmetrically preferable to play along main bank side center line
Rectification effect, described pair bank height H2=(0.05~0.2) H, secondary bank height H2 will cause greatly very much box culvert overflow section product it is too small,
H2 is too small, cannot achieve rectified action, and secondary bank length W1=(0.1~0.2) W, length W1 be too long, and to will cause water flow through-flow not
Freely, too short, its rectification effect can be weakened, pair bank centreline space is away from W2=(0.25~0.4) W in pairs, spacing it is too big or too it is small not
Conducive to the uniformity of its rectification effect；
The bilayer crossbeam includes vertically laying two layers of crossbeam in " > " shape, and two layers of crossbeam is arranged in parallel, and crossbeam edge goes out
Water tank is contained center line and is arranged symmetrically to play preferable rectification effect, obtains if applicant passes through the value analog study of dry test sum number
The value range that the double-deck crossbeam rectified action of " > " shape works well, the double-deck equal vertical connection in crossbeam two sides is in water outlet box culvert
Angle α=90 ° between side wall, i.e. crossbeam and water outlet box culvert side wall, to guarantee to play the expansion of the rectification on vertical to by water flow
Effect is dissipated, double-deck beam width D2=(0.2~0.3) W, beam width D2 are too small to be difficult to ensure that its structural strength, width are too big
Will increase cost of manufacture and to rectification effect improve it is not significant, single layer beam height H3=(0.1~0.2) H, height H3 is too small right
Rectification effect is unobvious, it is too big can reduce overflow section and increase additional hydraulic loss, lower layer's crossbeam distance from bottom water tank
Contain the too small and excessive adjustment for being unfavorable for flow-shape of floor height H4=(0.3~0.4) H, height H4, two layers of case bay H5
=(0.1~0.3) H, spacing H5 will affect greatly very much its rectification effect, it is too small can significantly increase hydraulic loss, shape bilayer crossbeam
Distance L2=(0.5~0.6) L, distance L2 of central point B apart from expansion type water outlet box culvert import too closely can be at the beginning of the convex bank
Walk that diffusion rectified action effect of the water flow of rectification on vertical is unobvious, goes out to flow uniformity apart from the too far water outlet box culvert that will cause
Improvement is insufficient；
The combined type diversion pier includes the multiple diversion piers being arranged symmetrically along expansion type water outlet box culvert center line, to play
The good result uniformly rectified in the horizontal direction, if applicant, which passes through the value analog study of dry test sum number, obtains combined type diversion pier
The value range that rectified action works well, the diversion pier quantity N=2 of water outlet box culvert center line unilateral side setting, diversion pier quantity
Overflow section can excessively be reduced, and then rectification effect is bad very little with hydraulic loss, quantity is significantly increased, close to water outlet box culvert center
The diversion pier of line is inside diversion pier, and the diversion pier far from water outlet box culvert center line is outboard diversion pier, combined type diversion pier quilt
The bilayer crossbeam passes through and its both ends cavetto is to reduce hydraulic loss, the top and bottom of combined type diversion pier respectively with sudden expansion
The top and bottom surface of type water outlet box culvert connect to realize that the upward water flow that hangs down can be acted on by the rectified diffusion of horizontal direction, combine
Width D 3=(0.05~0.15) W of formula diversion pier, width is too small to be difficult to ensure that its structural strength, width will increase greatly very much production
Cost and can reduce overflow section product, length L3=(0.2~0.3) L of inside diversion pier, inside diversion pier length L3 too it is short then
Its rectification effect is insufficient, length is too long, will increase cost of manufacture and degree that rectification effect further improves can reduce, institute
Angle γ=(0.2~0.3) θ of inside diversion pier and water outlet box culvert center line is stated, angle γ is too small, and it is whole can not to play diffusion
Stream effect will cause greatly very much exclusion on the outside of the excessive prestige of water flow, the head of inside diversion pier and the spacing of water outlet box culvert center line
W3=(0.2~0.3) W, spacing W3 is too small to make water flow be difficult to through the too big rectification effect that can be reduced in horizontal direction of, spacing
Too close or too far whole of horizontal distance L4=(0.2~0.4) L3, distance L4 of fruit, inside diversion pier and the double-deck crossbeam central point B
It is all undesirable to flow effect, outboard diversion pier and the double-deck crossbeam vertical connection and its length L5=(0.2~0.3) L, length L5 is too short
Then its rectification effect is insufficient, length is too long, will increase cost of manufacture and degree that rectification effect further improves can reduce,
Outboard diversion pier nose portion and bilayer crossbeam distance L6=(0.2~0.3) L5, distance L6 too close or too far rectification effect is not
It is ideal.
Preferably, the convex bank of " > " shape of the present invention, the double-deck crossbeam of " > " shape and combined type diversion pier are reinforcing bar
Concrete structure, to ensure that multiple rectification measure can satisfy water outlet box culvert design and construction requirement.
As a preferred embodiment, the water outlet box culvert length L is 10m, entrance width W is 2m, height H is 2m, expands
Dissipating angle θ is 45 °, and the convex bank width D 1 is 0.1m, and the main bank height H1 is 0.2m, main bank side and water outlet box culvert side wall
Angle β is 70 °, and main bank central point A and expansion type water outlet box culvert import distance L1 are 1m, and the pair bank height H2 is 0.1m, length
Degree W1 is 0.2m, secondary bank centreline space away from W2 is 0.5m in pairs, the bilayer crossbeam two sides and water outlet box culvert side wall angle α
It is 90 °, beam width D2 is 0.4m, and single layer beam height H3 is 0.2m, and lower layer's crossbeam distance from bottom is discharged box culvert floor height
H4 is 0.6m, and two layers of crossbeam spacing H5 is 0.6m, and the central point B of the double-deck crossbeam is apart from expansion type water outlet box culvert import distance L2
5m, the width D 3 of combined type diversion pier are 0.1m, and the length L3 of the inside diversion pier of the combined type diversion pier is 2m and water outlet
Box culvert centerlines γ is 9 °, and the head of inside diversion pier and the spacing W3 of water outlet box culvert center line are 0.4m and double-layer horizontal
The horizontal distance L4 of beam central point B is 0.4m, and the length L5 of outboard diversion pier is 2m, outboard diversion pier nose portion and the double-deck crossbeam
Distance L6 is 0.4m.
As another preferred embodiment, the water outlet box culvert length L is 10m, entrance width W is 2m, height H be 2m,
Angle of flare θ is 45 °, and the convex bank width D 1 is 0.2m, and the main bank height H1 is 0.4m, main bank side and water outlet box culvert side
Wall angle β be 90 °, main bank central point A and expansion type water outlet box culvert import distance L1 be 2m, the pair bank height H2 be 0.2m,
Length W1 is 0.3m, secondary bank centreline space away from W2 is 0.6m in pairs, the bilayer crossbeam two sides and water outlet box culvert side wall folder
Angle α is 90 °, and beam width D2 is 0.5m, and single layer beam height H3 is 0.3m, and it is high that lower layer's crossbeam distance from bottom is discharged box culvert bottom surface
Degree H4 is 0.7m, and two layers of crossbeam spacing H5 is 0.4m, and the central point B of the double-deck crossbeam is discharged box culvert import distance L2 apart from expansion type
For 5.5m, the width D 3 of combined type diversion pier is 0.2m, and the length L3 of inside diversion pier is 2.5m, presss from both sides with water outlet box culvert center line
Angle γ is 11.25 °, and the head of inside diversion pier and the spacing W3 of water outlet box culvert center line are 0.5m and the double-deck crossbeam central point B
Horizontal distance L4 be 0.75m, the length L5 of outboard diversion pier is 2.5m, outboard diversion pier nose portion and bilayer crossbeam distance L6
For 0.625m.
As another preferred embodiment, the water outlet box culvert length L is 10m, entrance width W is 2m, height H be 2m,
Angle of flare θ is 45 °, and the convex bank width D 1 is 0.3m, and the main bank height H1 is 0.5m, main bank side and water outlet box culvert side
Wall angle β is 110 °, and main bank central point A and water outlet box culvert import distance L1 are 3m, and the pair bank height H2 is 0.4m, length W1
For 0.4m, secondary bank centreline space away from W2 is 0.8m in pairs, and the bilayer crossbeam two sides are with box culvert side wall angle α is discharged
90 °, beam width D2 is 0.6m, and single layer beam height H3 is 0.4m, and lower layer's crossbeam distance from bottom is discharged box culvert floor height H4
It is 0.2m for 0.8m, two layers of crossbeam spacing H5, the central point B distance water outlet box culvert import distance L2 of the double-deck crossbeam is 6m, combination
The width D 3 of formula diversion pier is 0.3m, and the length L3 of inside diversion pier is 3m, is 13.5 ° with water outlet box culvert centerlines γ,
The head of inside diversion pier and the spacing W3 of water outlet box culvert center line are the horizontal distance L4 of 0.6m and the double-deck crossbeam central point B
It is 3m for 1.2m, the length L5 of outboard diversion pier, outboard diversion pier nose portion is 0.9m with bilayer crossbeam distance L6.
The beneficial effects of the present invention are:
A kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert of the present invention goes out to flow uniform method, in city rain
Pump works expansion type is discharged the multiple of the double-deck crossbeam combination combined type diversion pier of convex bank, " > " shape that " > " shape is arranged in box culvert
Rectification measure, wherein concentrate influent stream tentatively to be rectified expansion type water outlet box culvert entrance using the convex bank of " > " shape, make water
Stream is tentatively spread, and the double-deck crossbeam of " > " shape and combined type diversion pier are further right in vertical and horizontal direction respectively
Water flow plays the role of rectified diffusion, realizes to the homo-effect of expansion type water outlet box culvert water discharge speed distribution, helps to improve prominent
Expansion type is discharged the water outlet fluidised form of box culvert, for ensureing that urban rainwater pumping plant goes out to flow uniformity with important engineering application value.
The present invention mentions that multiple rectification measure structure is simple, be easy construction production, rectification effect is significant, is suitable for dashing forward
It is promoted the use of in the design of urban rainwater pump station engineering of expansion type water outlet box culvert, transformation.
Detailed description of the invention
Fig. 1 is plan view of the invention；
Fig. 2 is the planar structure scale diagrams of the embodiment of the present invention；
Fig. 3 is the facade structures scale diagrams of the embodiment of the present invention；
Fig. 4 is rectification of embodiment of the present invention front and back expansion type water outlet box culvert exit velocity relative standard deviation comparison diagram.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
As shown in Figures 1 to 3, the present invention relates to water outlet box culvert 1, wet well 2, extraneous river 3, convex bank 4, the double-deck crossbeam 5,
The technical characteristics such as combined type diversion pier 6, main bank 7, secondary bank 8.
A kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow uniform method, the water tank of urban rainwater pumping plant
Containing 1 along main flow direction is in expansion type, and the import of water outlet box culvert 1 is communicated with the wet well 2 of urban rainwater pumping plant, exported and outer boundary river
Road 3 is connected, and the convex bank 4, " > " shape bilayer crossbeam 5 and combined type diversion pier 6 of " > " shape are arranged in water outlet box culvert 1, described
4 pairs of water outlet 1 entrances of box culvert of convex bank concentrate influent streams to be rectified and rectify it tentatively, the bilayer crossbeam 5 with combine
Formula diversion pier 6 further rectifies preliminary divergent flow in vertical and horizontal direction respectively, realizes water outlet 1 water discharge speed of box culvert
It is distributed homo-effect, help to improve the water outlet fluidised form of water outlet box culvert 1 and ensures that urban rainwater pumping plant goes out the uniformity flowed；
The length of the water outlet box culvert 1 is L, entrance width W, is highly H, angle of flare θ；
The convex bank 4 includes main bank 7 and secondary bank 8, and width D 1 is (0.05~0.15) W, the main bank 7 in " > " shape and
It is arranged symmetrically along water outlet 1 center line of box culvert, main 7 height H1 of bank is (0.1~0.25) H, main 7 side of bank and water outlet 1 side wall of box culvert
Connect and angle β is 70 °~110 °, main 7 central point A of bank and water outlet 1 import distance L1 of box culvert are (0.1~0.3) L, the pair
Bank 8 is set to main 7 top of bank and a pair is respectively arranged along water outlet 1 center line two sides of box culvert, and unilateral pairs of secondary bank 8 is along main 7 side of bank
Side center line is arranged symmetrically, and secondary 8 height H2 of bank is that (0.05~0.2) H, length W1 are (0.1~0.2) W, in pairs 8 center of secondary bank
Line spacing W2 is (0.25~0.4) W；
It is in the crossbeam of " > " shape that the bilayer crossbeam 5, which includes two layers vertically laid, and two layers of crossbeam is arranged in parallel, crossbeam
It is arranged symmetrically along water outlet 1 center line of box culvert, the equal vertical connection in double-deck 5 two sides of crossbeam is 90 ° in water outlet 1 side wall of box culvert, that is, α, double
Layer 7 width D 2 of crossbeam is (0.2~0.3) W, and single layer beam height H3 is (0.1~0.2) H, lower layer's crossbeam distance from bottom water tank
Containing 1 floor height H4 is (0.3~0.4) H, and two layers of crossbeam spacing H5 is (0.1~0.3) H, the central point B distance of the double-deck crossbeam 5
The distance L2 for being discharged 1 import of box culvert is (0.5~0.6) L；
The combined type diversion pier includes the multiple diversion piers being arranged symmetrically along water outlet 1 center line of box culvert, is discharged box culvert
The diversion pier quantity N=2 that center line unilateral side is arranged, the diversion pier close to water outlet box culvert center line is inside diversion pier, far from out
The diversion pier that water tank contains center line is outboard diversion pier, the both ends cavetto of combined type diversion pier 6 and is worn by the double-deck crossbeam 5
It crosses, the top and bottom of combined type diversion pier 6 connects with the top of water outlet box culvert 1 and bottom surface respectively, the width of combined type diversion pier 6
Degree D3 is (0.05~0.15) W, and the length L3 of inside diversion pier is (0.2~0.3) L, is with water outlet box culvert centerlines γ
(0.2~0.3) θ, the head of inside diversion pier and the spacing W3 of water outlet 1 center line of box culvert are (0.2~0.3) W and the double-deck crossbeam
The horizontal distance L4 of central point B is (0.2~0.4) L3, the length L5 of outboard diversion pier be (0.2~0.3) L and with the double-deck crossbeam
5 vertical connections, outboard diversion pier nose portion are (0.2~0.3) L5 with bilayer 5 distance L6 of crossbeam.
The convex bank 4, the double-deck crossbeam 5 and combined type diversion pier 6 are reinforced concrete structure, can be pumped in urban rainwater
It stands and is discharged the construction or transformation scene progress pouring molding of box culvert.
Embodiment 1
The plane of expansion type water outlet box culvert of the present embodiment with multiple rectification measure proposed by the invention, facade structures ruler
Very little schematic diagram is as shown in Figure 2,3.
The water outlet box culvert length L=10m, entrance width W=2m, height H=2m, angle of flare θ=45 °, convex bank are wide
D1=0.05W=0.1m, main bank height H1=0.1H=0.2m, main bank side and water outlet box culvert side wall angle β=70 ° are spent, it is main
Bank central point A and water outlet box culvert import distance L1=0.1L=1m, secondary bank height H2=0.05H=0.1m, length W1=0.1W
=0.2m, in pairs secondary bank centreline space are away from W2=0.25W=0.5m, the double-deck crossbeam two sides and water outlet box culvert side wall angle α
=90 °, beam width D2=0.2W=0.4m, single layer beam height H3=0.1H=0.2m, the water outlet of lower layer's crossbeam distance from bottom
Box culvert floor height H4=0.3H=0.6m, two layers crossbeam spacing H5=0.3H=0.6m, the double-deck crossbeam central point B and expansion type
It is discharged box culvert import distance L2=0.5L=5m, diversion pier quantity N=2, combined type diversion pier is arranged in combined type diversion pier unilateral side
Width D 3=0.05W=0.1m, inside diversion pier length L3=0.2L=2m and water outlet box culvert centerlines γ=9 °, it is interior
Side diversion pier head and water outlet box culvert centreline space are away from W3=0.2W=0.4m, the horizontal distance L4 with the double-deck crossbeam central point B
=0.2L3=0.4m, outboard diversion pier length L5=0.2L=2m and its head and the double-deck crossbeam distance L6=0.2L5=
0.4m, convex bank, the double-deck crossbeam and combined type diversion pier are reinforced concrete structure.
Embodiment 2
Multiple rectification measure, difference from Example 1 described in the present embodiment are: convex bank width D 1=0.1W=
0.2m, main bank height H1=0.2H=0.4m, main bank side and water outlet box culvert side wall angle β=90 °, main bank central point A with go out
Water tank contains import distance L1=0.2L=2m, secondary bank height H2=0.1H=0.2m, length W1=0.15W=0.3m, in pairs pair
Bank centreline space is away from W2=0.3W=0.6m, the double-deck beam width D2=0.25W=0.5m, single layer beam height H3=0.15H
=0.3m, lower layer's crossbeam bottom and water outlet box culvert floor height H4=0.35H=0.7m, two layers of crossbeam spacing H5=0.2H=
0.4m, the double-deck crossbeam central point B and water outlet box culvert import distance L2=0.55L=5.5m, combined type diversion pier width D 3=
0.1W=0.2m, inside diversion pier length L3=0.25L=2.5m and water outlet box culvert centerlines γ=11.25 °, inside
Diversion pier head and water outlet box culvert centreline space are away from W3=0.25W=0.5m, the horizontal distance L4=with the double-deck crossbeam central point B
0.3L3=0.75m, outboard diversion pier length L5=0.25L=2.5m and its head and the double-deck crossbeam distance L6=0.25L5=
0.625m。
Embodiment 3
Multiple rectification measure described in the present embodiment, with Examples 1 and 2 the difference is that: convex bank width D 1=
0.15W=0.3m, main bank height H1=0.25H=0.5m, main bank side and water outlet box culvert side wall angle β=110 °, in main bank
Heart point A and water outlet box culvert import distance L1=0.3L=3m, secondary bank height H2=0.2H=0.4m, length W1=0.2W=
0.4m, in pairs secondary bank centreline space are away from W2=0.4W=0.8m, the double-deck beam width D2=0.3W=0.6m, single layer beam height
H3=0.2H=0.4m, lower layer's crossbeam bottom and water outlet box culvert floor height H4=0.4H=0.8m, two layers of crossbeam spacing H5=
0.1H=0.2m, the double-deck crossbeam central point B and water outlet box culvert import distance L2=0.6L=6m, the width D 3 of combined type diversion pier
=0.15W=0.3m, inside diversion pier length L3=0.3L=3m and water outlet box culvert centerlines γ=13.5 °, inside is led
Flow pier nose portion and water outlet box culvert centreline space away from
W3=0.3W=0.6m, the horizontal distance L4=0.4L3=1.2m with the double-deck crossbeam central point B, outboard diversion pier
Length L5=0.3L=3m and its head and the double-deck crossbeam distance L6=0.3L5=0.9m.
As shown in figure 4, using CFD numerical computation method, comparative analysis is using the above embodiment of the present invention multiple whole
The relative standard deviation situation of the forward and backward expansion type water outlet box culvert exit velocity of stream measure improvement result.Relative standard deviation CV's
Calculation formula:V in formulaiSpeed for any measuring point in section along main flow direction, VaFor section
Average speed, the number that n is section measuring point along main flow direction.For relative standard deviation CV, value is smaller to show water tank
It is better to contain the outlet flow rate of water flow uniformity.
According to Fig. 4 as can be seen that the expansion type water outlet box culvert outlet flow velocity relative standard after present invention rectification is inclined
Poor CV value is remarkably decreased, and reflects that multiple rectification measure proposed by the invention can significantly improve expansion type water outlet box culvert and go out to flow
The uniformity, help to ensure the stable operation of urban rainwater pumping plant outlet system and meet the navigation requirement in linking river.
Embodiment of the present invention is described in detail in conjunction with attached drawing above, but the present invention is not limited to described implementation
Mode.For those of ordinary skill in the art, in the range of the principle of the present invention and technical idea, to these embodiment party
Formula carries out a variety of variations, modification, replacement and deformation and still falls in protection scope of the present invention.
Claims (5)
1. a kind of guarantee urban rainwater pumping plant expansion type water outlet box culvert goes out to flow uniform method, urban rainwater pumping plant is discharged box culvert edge
Main flow direction is in expansion type, and the import of expansion type water outlet box culvert is communicated with the wet well of urban rainwater pumping plant, exported and outer boundary river
Road is connected, it is characterized in that: the convex bank of " > " shape, the double-deck crossbeam and combined type diversion pier of " > " shape are set in water outlet box culvert,
The convex bank concentrates influent stream to be rectified and rectify it tentatively water outlet box culvert entrance, the bilayer crossbeam with combine
Formula diversion pier further rectifies preliminary divergent flow in vertical and horizontal direction respectively, realizes water outlet box culvert water discharge speed point
Cloth homo-effect；
The length of the water outlet box culvert is L, entrance width W, is highly H, angle of flare θ；
The width D 1 of the convex bank=(0.05 ~ 0.15) W, convex bank include main bank and secondary bank, and the main bank is in " > " shape and edge
Water outlet box culvert center line is arranged symmetrically, and main bank height H1=(0.1 ~ 0.25) H, main bank side connects with water outlet box culvert side wall, and main
Angle β=70 ° ~ 110 ° between bank and water outlet box culvert side wall, main bank central point A and water outlet box culvert import distance L1=(0.1 ~
0.3) L, the pair bank are arranged at intervals at the top of main bank and a pair, unilateral pairs of pair are respectively arranged along water outlet box culvert center line two sides
Bank is arranged symmetrically along main bank side center line, secondary bank height H2=(0.05 ~ 0.2) H, length W1=(0.1 ~ 0.2) W, in pairs secondary bank
Centreline space away from W2=(0.25 ~ 0.4) W；
It is in the crossbeam of " > " shape that the bilayer crossbeam, which includes two layers vertically laid, and two layers of crossbeam is arranged in parallel, and crossbeam is along water outlet
Box culvert center line is arranged symmetrically, and the double-deck equal vertical connection in crossbeam two sides is in water outlet box culvert side wall, i.e. crossbeam and water outlet box culvert side
Angle α=90 ° between wall, width D 2=(0.2 ~ 0.3) W of the double-deck crossbeam, single layer beam height H3=(0.1 ~ 0.2) H, lower layer
Crossbeam distance from bottom is discharged box culvert floor height H4=(0.3 ~ 0.4) H, spacing H5=(0.1 ~ 0.3) H between two layers of crossbeam, double
Distance L2=(0.5 ~ 0.6) L of the central point B distance water outlet box culvert import of layer crossbeam；
The combined type diversion pier includes the multiple diversion piers being arranged symmetrically along water outlet box culvert center line, is discharged box culvert center line list
Diversion pier quantity N=2 of side setting, the diversion pier close to water outlet box culvert center line are inside diversion pier, far from water outlet box culvert center
The diversion pier of line is outboard diversion pier, the both ends cavetto of combined type diversion pier and is passed through by the double-deck crossbeam, combined type water conservancy diversion
The top and bottom of pier connects with the top of water outlet box culvert and bottom surface respectively, width D 3=(0.05 ~ 0.15) of combined type diversion pier
W, length L3=(0.2 ~ 0.3) L of inside diversion pier and water outlet box culvert centerlines γ=(0.2 ~ 0.3) θ, inside diversion pier
Head and water outlet box culvert center line spacing W3=(0.2 ~ 0.3) W, with the horizontal distance L4 of the double-deck crossbeam central point B=(0.2 ~
0.4) L3, outboard diversion pier and the double-deck crossbeam vertical connection, and the length L5 of outboard diversion pier=(0.2 ~ 0.3) L, outboard diversion
Pier nose portion and double-deck crossbeam distance L6=(0.2 ~ 0.3) L5.
2. guarantee urban rainwater pumping plant expansion type water outlet box culvert according to claim 1 goes out to flow uniform method, feature
Be: the convex bank, the double-deck crossbeam and combined type diversion pier are reinforced concrete structure.
3. guarantee urban rainwater pumping plant expansion type water outlet box culvert according to claim 1 goes out to flow uniform method, feature
Be: the water outlet box culvert length L is 10m, entrance width W is 2m, height H is 2m, angle of flare θ is 45 °, the convex bank width
D1 is 0.1m, the main bank height H1 be 0.2m, main bank side and water outlet box culvert side wall angle β be 70 °, main bank central point A with
Water outlet box culvert import distance L1 is 1m, and the pair bank height H2 is 0.1m, length W1 is 0.2m, pairs of secondary bank centreline space is away from W2
For 0.5m, the bilayer crossbeam two sides and water outlet box culvert side wall angle α are 90 °, and beam width D2 is 0.4m, single layer crossbeam
Height H3 is 0.2m, and it is 0.6m that lower layer's crossbeam distance from bottom, which is discharged box culvert floor height H4, and two layers of crossbeam spacing H5 is 0.6m, double
The central point B distance water outlet box culvert import distance L2 of layer crossbeam is 5m, and diversion pier quantity N is arranged in combined type diversion pier unilateral side
It is 2, the width D 3 of combined type diversion pier is 0.1m, and the length L3 of inside diversion pier is 2m and water outlet box culvert centerlines γ
It is 9 °, the head of inside diversion pier and the spacing W3 of water outlet box culvert center line are 2m and the horizontal distance of bilayer crossbeam central point B
L4 is 0.4m, and the length L5 of outboard diversion pier is 2m, and outboard diversion pier nose portion is 0.4m with bilayer crossbeam distance L6.
4. guarantee urban rainwater pumping plant expansion type water outlet box culvert according to claim 1 goes out to flow uniform method, feature
Be: the water outlet box culvert length L is 10m, entrance width W is 2m, height H is 2m, angle of flare θ is 45 °, the convex bank width
D1 is 0.2m, the main bank height H1 be 0.4m, main bank side and water outlet box culvert side wall angle β be 90 °, main bank central point A with
Water outlet box culvert import distance L1 is 2m, and the pair bank height H2 is 0.2m, length W1 is 0.3m, pairs of secondary bank centreline space is away from W2
For 0.6m, the bilayer crossbeam two sides and water outlet box culvert side wall angle α are 90 °, and beam width D2 is 0.5m, single layer crossbeam
Height H3 is 0.3m, and it is 0.7m that lower layer's crossbeam distance from bottom, which is discharged box culvert floor height H4, and two layers of crossbeam spacing H5 is 0.4m, double
The central point B of layer crossbeam is 5.5m apart from expansion type water outlet box culvert import distance L2, and the setting of combined type diversion pier unilateral side is led
Stream pier quantity N is 2, and the width D 3 of combined type diversion pier is 0.2m, and the length L3 of inside diversion pier is 2.5m and is discharged in box culvert
Heart wire clamp angle γ is 11.25 °, and the head of inside diversion pier and the spacing W3 of water outlet box culvert center line are 2.5m and the double-deck crossbeam
The horizontal distance L4 of central point B is 0.75m, and the length L5 of outboard diversion pier is 2.5m, outboard diversion pier nose portion and the double-deck crossbeam
Distance L6 be 0.625m.
5. guarantee urban rainwater pumping plant expansion type water outlet box culvert according to claim 1 goes out to flow uniform method, feature
Be: the water outlet box culvert length L is 10m, entrance width W is 2m, height H is 2m, angle of flare θ is 45 °, the convex bank width
D1 is 0.3m, the main bank height H1 be 0.5m, main bank side and water outlet box culvert side wall angle β be 110 °, main bank central point A with
Water outlet box culvert import distance L1 is 3m, and the pair bank height H2 is 0.4m, length W1 is 0.4m, pairs of secondary bank centreline space is away from W2
For 0.8m, the bilayer crossbeam two sides and water outlet box culvert side wall angle α are 90 °, and beam width D2 is 0.6m, single layer crossbeam
Height H3 is 0.4m, and it is 0.8m that lower layer's crossbeam distance from bottom, which is discharged box culvert floor height H4, and two layers of crossbeam spacing H5 is 0.2m, double
The central point B distance water outlet box culvert import distance L2 of layer crossbeam is 6m, and diversion pier quantity N is arranged in combined type diversion pier unilateral side
It is 2, the width D 3 of combined type diversion pier is 0.3m, and the length L3 of inside diversion pier is 3m and water outlet box culvert centerlines γ
It is 13.5 °, the head of inside diversion pier and the spacing W3 of water outlet box culvert center line are 3m and the level of bilayer crossbeam central point B
Distance L4 is 1.2m, and the length L5 of outboard diversion pier is 3m, and outboard diversion pier nose portion is 0.9m with bilayer crossbeam distance L6.
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| CN110952648A (en) * | 2019-12-09 | 2020-04-03 | 扬州大学 | Structure and method for regulating and controlling diffusion flow of front pool of pump station |
| CN111075008B (en) * | 2020-01-08 | 2021-01-05 | 河海大学 | Can realize even mixed well of reposition of redundant personnel |
| CN114032798B (en) * | 2021-09-26 | 2022-07-29 | 河海大学 | Method for ensuring even outflow of water tank culvert for distributing and distributing porous water in urban drainage pumping station |
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