CN106835890A - Concave herbaceous field system and construction method based on sponge city - Google Patents

Concave herbaceous field system and construction method based on sponge city Download PDF

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Publication number
CN106835890A
CN106835890A CN201710088290.3A CN201710088290A CN106835890A CN 106835890 A CN106835890 A CN 106835890A CN 201710088290 A CN201710088290 A CN 201710088290A CN 106835890 A CN106835890 A CN 106835890A
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China
Prior art keywords
concave
trackside
kerb
greenbelt
concave type
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CN201710088290.3A
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Inventor
程小亮
赵乾文
叶春
王阳
蒋远浩
于建磊
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Wisdri Engineering and Research Incorporation Ltd
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Wisdri Engineering and Research Incorporation Ltd
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Priority to CN201710088290.3A priority Critical patent/CN106835890A/en
Publication of CN106835890A publication Critical patent/CN106835890A/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224—Surface drainage of streets
    • E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/046—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps adapted to be used with kerbs
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40—Protecting water resources

Abstract

The invention discloses a kind of concave herbaceous field system based on sponge city, including energy dissipating layer, up concave type greenbelt, impervious barrier, rubble french drain；Energy dissipating layer includes trackside kerb, cobble energy dissipation tank, pea gravel concreten, and cobble energy dissipation tank is placed in trackside kerb inner side, and trackside kerb, cobble energy dissipation tank are placed on pea gravel concreten；Overflowing rain water mouthful is provided with the minimum point of up concave type greenbelt；Sand sediment trap is additionally provided with up concave type greenbelt；Impervious barrier includes the cement mortar, pitch, the antiseepage composite geo-membrane that set gradually from top to bottom；Rubble french drain is placed in the lowest part of impervious barrier, and transverse drain and and flexible porous tube are provided with rubble french drain；It is sequentially filled coarse sand bed course, metalling from top to bottom in rubble french drain.The present invention also provides a kind of construction method of the concave herbaceous field system based on sponge city.The present invention can realize the oozing, store of sponge city, it is stagnant, with, row function, reach good rainwater discharge, Collection utilization effect.

Description

Concave herbaceous field system and construction method based on sponge city
Technical field
The invention belongs to municipal engineering construction technical field, and in particular to a kind of concave herbaceous field system based on sponge city System and construction method.
Background technology
In recent years, flood outstanding problem is accumulated in some cities after heavy showers weather, has had a strong impact on the normal operation in city, Cause the heavy losses of people's lives and properties.In the case where the storm water man- agement theory of traditional " based on row " is instructed, cities and towns will receive The most of rainwater for collecting pass through municipal Storm Sewer Network and enter receiving water body rapidly, and lower infiltration soil is hardly considered for rainwater The approach such as earth, recycling.City hardened ground causes rainfall runoff to aggravate, with rainwater washing away in earth's surface, rainwater footpath Research schedule is also put in stream pollution problem.
At present, by setting subgrade and pavement drainage system road pavement water, underground water by aggregation, obstruction, every logical, dredging etc. Mode is rejected to beyond the scope that roadbed covers ground.Existing subgrade and pavement drainage system generally using horizontal gentle slope method and Block water band.Horizontal gentle slope method is mainly used in that charge for remittance capacity is smaller, dike relatively low, gradient height high in road surface is different and roadbed slope have compared with The road surface of strong erosion resistibility.Block water band and apply in general to that current scour power is larger, can quickly discharge the occasion of surface water.At present Also a kind of drainage pattern-central strip draining.Central strip draining is generally divided into two kinds：First, when the width of median strip When degree is less than 3m, using being provided with the cross-section surface model in paving to middle dividing strip two ends by the way of two-way horizontal wall inscription, road Water is flowed on the road surface at road two ends from centre, is allowed to be imported into unified drainage system.Second, when the middle width for separating During more than 3m, the cross fall of inside inundation is set, after being imported into intermediate recess location by concentrating surface water, gradient inertia will It is entered in horizontal roadbed.Based on " row ", the collection to rainwater, purification, reuse lacks consideration to above-mentioned several processing methods.
In view of current present situation of drainage and problem, domestic and international many cities start to put into practice rain flood management concept, by rain flood Ooze that storage technology is designed in conjunction with urban road, build " the sponge city with natural accumulation, naturally osmotic, self-purification as target City ".《Opinion of the State Council on reinforcement urban infrastructure construction》Explicitly pointed out in (promulgated by the State Council [2013] 36), build Converge rainwater, flood storage water drainage, recharge of groundwater, purifying ecological function in formula greenery patches and Patterns in Urban Wetland Park, lifting urban green space.Can See that sunk type greenery patches has great importance to the hydrology Regulation Function for lifting urban green space.
The content of the invention
It is an object of the invention to provide a kind of concave herbaceous field system and construction method based on sponge city, the system With method can realize the oozing of sponge city, store, it is stagnant, with, row function, reach good rainwater discharge, Collection utilization effect.
The technical solution adopted in the present invention is：
A kind of concave herbaceous field system based on sponge city, is placed between car lane, bicycle lane, including energy dissipating Layer, up concave type greenbelt, impervious barrier, rubble french drain；
The energy dissipating layer has two, is respectively placed in car lane and bicycle lane edge, including trackside kerb, cobble disappear Energy pond, pea gravel concreten, cobble energy dissipation tank are placed in trackside kerb inner side, and trackside kerb, cobble energy dissipation tank are placed in microlith coagulation On soil；
The up concave type greenbelt is placed between two energy dissipating layers, is provided with the minimum point of up concave type greenbelt and underground The overflowing rain water mouthful of drainage system connection；Sand sediment trap is additionally provided with up concave type greenbelt, the sand sediment trap is near car lane Side；
The antiseepage is placed on up concave type greenbelt lower section, in concave, including the cement bonded sand for setting gradually from top to bottom Slurry, pitch, antiseepage composite geo-membrane；
The rubble french drain is placed in the lowest part of impervious barrier, be provided with the rubble french drain transverse drain and with horizontal row The flexible porous tube of water pipe connection；It has been sequentially filled coarse sand bed course, metalling from top to bottom in rubble french drain.
Multiple water inlets are provided with trackside kerb, the spacing of adjacent water inlet is 40m, to facilitate rainwater to enter up concave type Greenery patches, also ensures that trackside kerb intensity, improves Road Service Life.
Up concave type greenbelt is curved, its minimum point 0.1-0.3m lower than the pavement edge of car lane, so that the system Storage, the row function being optimal.
The width of the cobble energy dissipation tank is 0.2-0.3m, reduces rainwater with minimum widith and road is washed away, and cuts down road surface Runoff, cuts down crest discharge, alleviates the flood detention disaster that road triggers by heavy rain.
Sand sediment trap top mark height is in the pavement edge 0.1m of car lane；Overflowing rain water mouthful has multiple, adjacent overflowing rain water The spacing of mouth is 4m, and the good discharge of unnecessary rainwater is made with the realization under minimum input.
The present invention also provides the construction method of the above-mentioned concave herbaceous field system based on sponge city, comprises the following steps：
The first step, complete rubble french drain and build
It is filled with rubble french drain in coarse sand and rubble, rubble french drain and wraps up flexible porous tube and be connected with flexible porous tube Transverse drain；
Second step, impervious barrier are built
After building ground floor cement stabilized macadam base, pave antiseepage composite geo-membrane, is applied on antiseepage composite geo-membrane One layer of pitch, then cover cement mortar；
3rd step, complete energy dissipating layer build
Pea gravel concreten is laid after the pavement spread for completing car lane and bicycle lane, is installed on pea gravel concreten Trackside kerb, cobble energy dissipation tank is laid in the inner side of trackside kerb；
4th step, complete up concave type greenbelt and build
The minimum point of up concave type greenbelt is lower than the pavement edge of car lane, and sets overflowing rain water mouthful in minimum point； Sand sediment trap is set near car lane side in up concave type greenbelt.
The present invention has responded the theory in " sponge city ", and urban road drainage system is combined with concave herbaceous field system, " oozing ", " storage ", " row " are carried out to rainwater, is that a kind of ecological rainwater oozes storage facility.Its major advantage is：One is disappeared by cobble Energy pond is reduced rainwater and road is washed away, and cuts down pavement runoff, cuts down crest discharge, alleviates the flood detention calamity that road triggers by heavy rain Evil；Two is, by rainwater purification, to mitigate dust on the roads by up concave type greenbelt (ecologic rainwater filtering), mitigates road surface pollution；Three It is that Greenland Irrigation water is saved by up concave type greenbelt, rubble french drain, saves precipitation and pavement runoff, supplements soil water resources And groundwater resources, it is (transverse drain, soft with reference to the drainage pipeline facility of overflowing rain water mouthful in greenbelt, rubble french drain Water pipe), when surface runoff is larger, during greenbelt savings scarce capacity, rainwater can be less than road by being higher by greenbelt elevation The overflowing rain water mouthful of face elevation enters underdrainage system, and the drainage pipeline facility of rubble french drain can also be by up concave type greenbelt Interior unnecessary water discharge；Realize rainwater " storage ", " row " function, also achieve prevent waterlogging, water resource from utilizing, beautification of landscape Multiple benefits.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of concave herbaceous field system of the present invention based on sponge city；
Fig. 2 is the overlooking the structure diagram of concave herbaceous field；
Wherein：1st, cobble energy dissipation tank, 2, concave herbaceous field, 3, overflowing rain water mouthful, 4, sand sediment trap, 5,Laterally Drainpipe, 6,Flexible porous tube, 7, coarse sand bed course, 8, metalling, 9, impervious barrier, 10, pea gravel concreten, 11, Car lane, 12, bicycle lane, 13, trackside kerb.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not For limiting the present invention.
Referring to Fig. 1 and Fig. 2, a kind of concave herbaceous field system based on sponge city is placed in car lane 11, non-motor vehicle Between road 12, including energy dissipating layer, up concave type greenbelt 2, impervious barrier 9, rubble french drain.Energy dissipating layer has two, is respectively placed in motor-driven Track 11 and the edge of bicycle lane 12, including trackside kerb 13, width are cobble energy dissipation tank 1, the microlith coagulation of 0.2-0.3m Soil 10；Trackside kerb 13 is provided with the water inlet that spacing is 40m；Cobble energy dissipation tank 1 is placed in the inner side of trackside kerb 13, and trackside edge Stone 13, cobble energy dissipation tank 1 are placed on pea gravel concreten 10.Up concave type greenbelt 2 is placed between two energy dissipating layers, curved, its Minimum point 0.1-0.3m lower than the pavement edge of car lane 11, in the preferred embodiment, the minimum point ratio of up concave type greenbelt 2 The low 0.2m of pavement edge of car lane 11；Multiple and underdrainage system is provided with the minimum point of up concave type greenbelt 2 to connect The overflowing rain water mouthful 3 for connecing, the spacing of adjacent overflowing rain water mouthful 3 is 4m；Overflowing rain water mouthful 3 is higher by the minimum of up concave type greenbelt 2 Put and be less than road surface (car lane and bicycle lane) elevation, in order to the discharge of rainwater；On up concave type greenbelt 2, lean on The nearly side of car lane 11 is additionally provided with sand sediment trap 4, the top mark of sand sediment trap 4 height in the edge 0.1m of car lane 11, for filtering, only Change rainwater.Impervious barrier 9 is placed in the lower section of up concave type greenbelt 2, in concave, including set gradually from top to bottom cement mortar, Pitch, antiseepage composite geo-membrane, cement mortar are the thick M5 cement mortar of 2cm.Rubble french drain is placed in the lowest part of impervious barrier, and Positioned at the underface of overflowing rain water mouthful 3；It is provided with rubble french drainTransverse drain 5 and withLaterally The connection of drainpipe 5Flexible porous tube 6；It is sequentially filled the thick coarse sands of 5cm from top to bottom in rubble french drain The thick metalling 8 of bed course 7,30cm.
The construction method of the above-mentioned concave herbaceous field system based on sponge city, comprises the following steps：
The first step, complete rubble french drain and build
Filled with full bag coarse sand (thick 5cm) of anti-seepage geomembrane and the thick rubbles of 30cm in rubble french drain, in rubble french drain also It is enclosed withFlexible porous tube, shouldFlexible porous tube withTransverse drain 5 is connected；
Second step, impervious barrier are built
After building ground floor cement stabilized macadam base, pave antiseepage composite geo-membrane, is applied on antiseepage composite geo-membrane One layer of pitch, then cover 2cmM5 cement mortar；
3rd step, complete energy dissipating layer build
Pea gravel concreten is laid after the pavement spread for completing car lane and bicycle lane, is installed on pea gravel concreten Trackside kerb, cobble energy dissipation tank is laid in the inner side of trackside kerb, and energy dissipation tank is used to reduce rainwater energy in itself, it is to avoid rainwater stream Speed causes to wash away by force to soil greatly；
4th step, complete up concave type greenbelt and build
The minimum point of up concave type greenbelt 0.1-0.3m lower than the pavement edge of car lane, minimum point is arranged as required to In the middle of greenbelt or other positions, it is the overflowing rain water mouthful of 4m to set spacing in minimum point, for collecting rainwater；In up concave type Sand sediment trap is set near car lane side in greenbelt, in order to purifying rainwater.
In the present invention, road surface and periphery rainwater enter greenbelt and then are filtered and purified by greenbelt, when greenbelt storage When storing scarce capacity, rainwater enters underdrainage system by overflowing rain water mouth, and the rainwater of collection can be used for greenbelt maintenance And road surface cleaning.The present invention has storage, oozes rainwater, cuts down crest discharge, mitigates the advantages of rainwash, pollution.
Concave herbaceous field Analysis of Water Balance：
Concave herbaceous field oozes accumulation of energy power by part rainwater in the treatment such as infiltration, evaporation, accumulation gathering ground beyond greenery patches Rainwater enters storm sewer nearby, there is following water balance relational expression in calculation interval：
P0+U0=D+E+S+U1+Q (1)
In formula：P0- quantum of rainfall, m3；U0- initial reservoir storage, m3；D-runoff loss amount, m3；E-evaporation capacity, m3； S-lower milliosmolarity, m3；U1- at the end of greenery patches reservoir storage, m3；The outer displacement of Q-overflow, m3。
The green rainwater of up concave type oozes storage capacity calculation：
It is that greenery patches infiltration in rainfall, the amount of accumulation rainwater are accounted for into the total rainwater in greenery patches that concave herbaceous field rainwater oozes storage rate The percentage of run-off, is represented with N.Can be calculated by formula (2), not examined because evaporation capacity E is smaller in the period, therefore in calculating Consider；By oozing the calculating of storage rate to rainfall runoff, can reflect that the rainwater of concave herbaceous field oozes accumulation of energy power；
In formula：Pz- rainfall, mm；F1- greenery patches coverage area (i.e. gathering ground area), m2；F2- up concave type is green Ground area, m2；CnThe runoff coefficient of-greenery patches coverage.
Lower milliosmolarity S computing formula：
S=60KJF2T (3)
In formula：K-vegetation restoration speed, m/s；J-hydraulic gradient, it is vertical under when oozing, J=1；T-ooze storage calculating Period, min.
Concave herbaceous field reservoir storage U1Computing formula is：
U1=F2Δh (4)
The discrepancy in elevation of △ h in formula-between recessed depth, i.e. concave herbaceous field and overfall or road surface, cm.
According to local rainfall intensity q (t), the rainfall P in the unit intervalzCan be by acquisition of being quadratured to rainfall intensity； Wuhan Area rainfall intensity formula：
In formula：Q (t)-design storm intensity, mm/min；P-design storm return period, a；T-rainfall duration, min, it is military Chinese area calculates according to 60min.
According to formula (2), (3), (4), when green percentage reaches maximum control volume, i.e. during N=100%, can calculate Go out the rainfall depth formula such as (7), the submergence depth such as formula (8) needed for greenbelt of critical value：
Example：
For quantitative description concave herbaceous field oozes storage effect to rainfall runoff, by taking the A of certain closed area as an example, region removes green Ground is with the runoff coefficient C of outer areanIt is 0.9, it is assumed that the early stage reservoir storage U of evaporation capacity E and concave herbaceous field0It is zero.With the area Survey the maximum and minimum value of soil stabilization infiltration rate K, i.e., 5 × 10 in domain-5M/s and 3 × 10-7M/s is representative combination Wuhan City Storm-water system career management specifies that selection ordinary circumstance next year, 3 years and 5 years one meets design storm return period, i.e. 1h rainfalls Amount is respectively the situation of 35.5mm, 49.6mm and 56.3mm, according to formula (1)~formula (6), calculates different greenlands area in 1h and compares f (f=F1/F2), the greenery patches rainwater under recessed depth delta h ooze storage rate N, result of calculation is shown in Table, as a result shows, when K=5 × 10-5During m/s, f=25%, the concave herbaceous field of Δ h >=0.1m, the design storm met for a year, 3 years and 5 years reappears Phase, the rainfall for continuing 1h can ooze storage by concave herbaceous field；For K=3 × 10-7The situation of m/s, be with f=35% Δs h=0.3m Example, the heavy rain met for a year can be oozed storage, the heavy rain met for 3 years and 5 years, and N is up to 94% and 81%.
From calculated examples it can be seen that：
Selection different designs parameter, it is also different that rainwater oozes accumulation of energy power.Such as coordinate appropriate engineering measure, city rain can be turned into The important Ecological Measures of flood management.Concave herbaceous field Function is influenceed by factors, wherein concave herbaceous field area ratio F, the recessed depth △ h in greenery patches, soil of greenbelt stabilization infiltration rate K and design storm return period P are influence concave herbaceous fields to rain Water oozes the material impact factor for storing efficiency.Design has very important meaning from suitable parameter.
1st, Vertical Design
Sunk type road green belt Vertical Design will consider orographic condition, edaphic condition, rainfall and greenbelt and product compares The factors such as the Selective type of rate and plant, are rationally designed and are laid out.Submergence depth is too small, and rainwater is largely outer to be arranged, it is impossible to Play a part of rainwater function of regulating and storing, submergence depth is excessive, rainwater largely oozes storage in greenbelt, once flooded more than the resistance to of vegetation Time will bring disaster.So, for the Vertical Design of quantitative description greenbelt, by taking Wuhan Area as an example, certain sudden and violent The rain return period descends, it is assumed that N is 100%, is become according to the rainfall H that formula (5) and formula (6) can calculate different reoccurrence Wuhan Change, when T values be 1,3,5,10a when, corresponding Wuhan rainfall H is respectively 48.47,61.19,67.11,75.13mm, it is seen that With the increase of return period, rainfall is consequently increased, but increase trend slows down.
The return period of 3a is selected, if its vegetation restoration COEFFICIENT K is 1.5 × 10-6M/s, pavement runoff coefficient is 0.9, Water conservancy gradient J be set to it is vertical under to ooze be 1, time t takes 60min, submergence depth △ h take 10,15,20,25,30cm, institute can be calculated The roadside greening rate f for needing is respectively 56.4%, 37.3%, 27.9%, 22.2%, 18.5%.
It can be seen that, when the heavy depth of roadside greening under band is in 10~30cm can just meet rainwater oozes storage demand, and design is less than 20cm's can also absorb a certain amount of rainwater, and remaining rainwater can be entered by overfall saves device, it is also possible to enter rain Waterpipe.The physical features of Wuhan Urban is relatively flat, and the highway layout gradient is also smaller, is relatively adapted to design sunk type roadside greening Band, preferably by highway layout at higher topographical, is conducive to rainwater to flow to the relatively low sunk type greenbelt of physical features and periphery greenery patches. In order to reduce rainwash, take ecological pavement to process at pavement and bicycle lane, and need rationally design to sink Formula greenbelt and road surface and the bridging mode of overflowing rain water mouthful.First, curb kerbstone design height is preferably not higher than road surface, as far as possible Concordant with road surface, need to such as be higher by road surface will also design breach to ensure that rainwater flows into sinking greenery patches；Secondly, in greenbelt shortcut face Side will spread 20~30cm cobbles wide, prevent greenbelt soil to be washed, soil level from top to bottom using gravel, sand, soil, Covering carries out laying and can be more beneficial for rainwater infiltration；Finally, the elevation of stormwater overflow mouthful should be less than road surface, can design in greening Band centre or both sides, and to do anti-clogging treatment.
2nd, concave herbaceous field area compares f
The percentage that sunk type greenbelt accounts for entire area influences particularly evident to the discharge rate of rainwater, according to formula (8), If its vegetation restoration COEFFICIENT K is 1.5 × 10-6M/s, is 0.9 in pavement runoff coefficient, and water conservancy gradient J oozes under being set to vertically It is 1, time t takes 60min, variable greenbelt ratio f difference values 10%, 20%, 30%, 40%, 50% draw different sudden and violent The rain return period descends the submergence depth h of road green belt.
With the increase of green percentage, required submergence depth reduces, and big later in the above range of decrease, when f reaches Sinking depth minus are few less when more than 30%.When roadside greening rate is less than 20%, required submergence depth exceedes to sink to afforesting Critical value with design, may be unfavorable for the growth of plant.And best suiting Wuhan roadside greening rate standard can also meet sunk type The green percentage of greenbelt functional requirement is 30% or so.When f is 35%, the sinking depth of storm recurrence period 1,3,5,10a is met Degree respectively 14.7,18.6,20.4,22.9cm, meets submergence depth Specification Design, oozes storage effect obvious.And in the big portion in Wuhan Region-by-region, roadside greening rate is generally higher than 20%, and many areas all reach 30%, but substantially belong to elevation greenery patches, it is impossible to ooze Rainwater on road surface is stored, design is only needed to for existing greenery patches to be transformed into sunk type greenbelt and can just keep the rain of most of road 80% here Water.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted, And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.

Claims (7)

1. a kind of concave herbaceous field system based on sponge city, is placed between car lane, bicycle lane, and its feature exists In：Including energy dissipating layer, up concave type greenbelt, impervious barrier, rubble french drain；
The energy dissipating layer has two, is respectively placed in car lane and bicycle lane edge, including trackside kerb, cobble energy dissipating Pond, pea gravel concreten, cobble energy dissipation tank are placed in trackside kerb inner side, and trackside kerb, cobble energy dissipation tank are placed in pea gravel concreten On；
The up concave type greenbelt is placed between two energy dissipating layers, and overflowing rain water is provided with the minimum point of up concave type greenbelt Mouthful；Sand sediment trap is additionally provided with up concave type greenbelt, the sand sediment trap is near car lane side；
The antiseepage is placed on up concave type greenbelt lower section, in concave, including cement mortar, the drip for setting gradually from top to bottom Blue or green, antiseepage composite geo-membrane；
The rubble french drain is placed in the lowest part of impervious barrier, and transverse drain and and transverse drain are provided with the rubble french drain The flexible porous tube of connection；It has been sequentially filled coarse sand bed course, metalling from top to bottom in rubble french drain.
2. the concave herbaceous field system based on sponge city according to claim 1, it is characterised in that：On trackside kerb Multiple water inlets are provided with, the spacing of adjacent water inlet is 40m.
3. the concave herbaceous field system based on sponge city according to claim 1, it is characterised in that：Up concave type greenbelt It is curved, its minimum point 0.1-0.3m lower than the pavement edge of car lane.
4. the concave herbaceous field system based on sponge city according to claim 1 or 3, it is characterised in that：The cobble The width of energy dissipation tank is 0.2-0.3m.
5. the concave herbaceous field system based on sponge city according to claim 4, it is characterised in that：Sand sediment trap top mark is high Less than the pavement edge 0.1m of car lane；Overflowing rain water mouth has multiple, and the spacing of adjacent overflowing rain water mouthful is 4m.
6. a kind of construction method of the concave herbaceous field system based on sponge city, it is characterised in that comprise the following steps：
The first step, complete rubble french drain and build
Parcel flexible porous tube and the horizontal stroke being connected with flexible porous tube in coarse sand and rubble, rubble french drain are filled with rubble french drain To drainpipe；
Second step, impervious barrier are built
After building ground floor cement stabilized macadam base, paved antiseepage composite geo-membrane, and one layer is applied on antiseepage composite geo-membrane Pitch, then cover cement mortar；
3rd step, complete energy dissipating layer build
Pea gravel concreten is laid after the pavement spread for completing car lane and bicycle lane, trackside is installed on pea gravel concreten Kerb, cobble energy dissipation tank is laid in the inner side of trackside kerb；
4th step, complete up concave type greenbelt and build
The minimum point of up concave type greenbelt is lower than the pavement edge of car lane, and sets overflowing rain water mouthful in minimum point；Under Sand sediment trap is set near car lane side in female greenbelt.
7. construction method according to claim 6, it is characterised in that：The minimum point of up concave type greenbelt is than car lane The low 0.1-0.3m of pavement edge.
CN201710088290.3A 2017-02-17 2017-02-17 Concave herbaceous field system and construction method based on sponge city Pending CN106835890A (en)

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CN107090891A (en) * 2017-06-23 2017-08-25 四川省信诚建设劳务有限公司 One kind circulation infiltration retaining sponge integral system
CN107869183A (en) * 2017-11-30 2018-04-03 中国电建集团成都勘测设计研究院有限公司 Concave herbaceous field structure
CN108505527A (en) * 2018-02-08 2018-09-07 杭州江润科技有限公司 The construction method of pre-buried skeleton strength core masonry cable duct
CN109372080A (en) * 2018-12-18 2019-02-22 河南师范大学 A kind of rain processing system having both fire engine way and concave herbaceous field
CN109778673A (en) * 2019-01-23 2019-05-21 平顶山市公路交通勘察设计院 Greenbelt construction technology and the bridge built using the technique on a kind of bridge
CN109964746A (en) * 2019-04-24 2019-07-05 石家庄市政设计研究院有限责任公司 A kind of sponge city sunk type greenery patches structure
CN111648199A (en) * 2020-05-26 2020-09-11 中冶南方城市建设工程技术有限公司 Water drainage structure system is prevented to city reconstruction road central authorities' median
CN114182600A (en) * 2021-11-29 2022-03-15 青海省交通规划设计研究院有限公司 Quick drainage system in green's road surface

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CN107090891A (en) * 2017-06-23 2017-08-25 四川省信诚建设劳务有限公司 One kind circulation infiltration retaining sponge integral system
CN107869183A (en) * 2017-11-30 2018-04-03 中国电建集团成都勘测设计研究院有限公司 Concave herbaceous field structure
CN108505527A (en) * 2018-02-08 2018-09-07 杭州江润科技有限公司 The construction method of pre-buried skeleton strength core masonry cable duct
CN109372080A (en) * 2018-12-18 2019-02-22 河南师范大学 A kind of rain processing system having both fire engine way and concave herbaceous field
CN109778673A (en) * 2019-01-23 2019-05-21 平顶山市公路交通勘察设计院 Greenbelt construction technology and the bridge built using the technique on a kind of bridge
CN109964746A (en) * 2019-04-24 2019-07-05 石家庄市政设计研究院有限责任公司 A kind of sponge city sunk type greenery patches structure
CN111648199A (en) * 2020-05-26 2020-09-11 中冶南方城市建设工程技术有限公司 Water drainage structure system is prevented to city reconstruction road central authorities' median
CN114182600A (en) * 2021-11-29 2022-03-15 青海省交通规划设计研究院有限公司 Quick drainage system in green's road surface

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Application publication date: 20170613