CN207619765U - A kind of permeable terrace - Google Patents
A kind of permeable terrace Download PDFInfo
- Publication number
- CN207619765U CN207619765U CN201721659735.0U CN201721659735U CN207619765U CN 207619765 U CN207619765 U CN 207619765U CN 201721659735 U CN201721659735 U CN 201721659735U CN 207619765 U CN207619765 U CN 207619765U
- Authority
- CN
- China
- Prior art keywords
- drainpipe
- layer
- storage cavity
- pervious concrete
- sliding panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model discloses a kind of permeable terraces, including plain soil layer, macadam gradating layer, pervious concrete layer, porous pavement layer, macadam gradating layer and pervious concrete layer intersection are equipped with more drainpipes, drainpipe one end is communicated with the storage cavity being set in pervious concrete layer, and the other end is communicated in city planting ductwork, and multiple inlet openings are offered on the first half pipe shaft of drainpipe, the outside of drainpipe is also wrapped with permeable layer；It is in up-small and down-big truncated cone-shaped hollow pipe to have the more diversion pipes being vertically arranged, diversion pipe in pervious concrete layer.Diversion pipe can provide a channel directly down for the ponding on road surface, accelerate the discharge of flow, no longer only rely on the performance of pervious concrete itself；Storage cavity provides not only water-holding capacity, can also adjust the humidity of terrace in time；Drainpipe is not only connected to storage cavity and city planting ductwork, and multiple inlet openings also are provided on its pipe shaft, strengthens the drainability of terrace entirety, can quickly drain the ponding on terrace.
Description
Technical field
The utility model is related to municipal road construction field, more particularly to a kind of permeable terrace.
Background technology
With the development of concrete making technology, the construction of modern city is by the solution of the plumbing of road and urban heat land effect
Scheme has all concentrated on road sheet, by the construction of pervious concrete, accelerates the discharge of road surface moisture, while can also reach
To connection soil and air, well ventilative effect is formed, to reduce tropical island effect.
A kind of municipal permeable terrace is disclosed in the Chinese patent document that Authorization Notice No. is CN205223774U, including extremely
Ponding layer, laying, macadam gradating layer and asphalt surface are disposed at the top of the base course of bottom, base course
Layer, moisture permeates above layer structure and enters in ponding layer successively when raining accumulates, and road surface when being dry provides sustained release and tune
The effect of section balances humidity, slows down tropical island effect.
But, the ability of the permeable terrace draining water storage in said program is extremely limited, especially in summer rainwater precipitation
Peak time is measured, moisture reduction surface gathered water how to be discharged as early as possible and is only even more important thing.
Utility model content
The purpose of this utility model is to provide a kind of permeable terrace, has the effect of effective quickly discharge terrace ponding.
The above-mentioned technical purpose of the utility model technical scheme is that：A kind of permeable terrace, from
Upper down includes plain soil layer, macadam gradating layer, pervious concrete layer, porous pavement layer, it is characterised in that：The macadam gradating layer
More drainpipes are equipped with the pervious concrete layer intersection, described drainpipe one end, which is communicated with, is set to pervious concrete
Storage cavity in layer, and the other end is communicated in city planting ductwork, the drainpipe from the one end being connect with storage cavity to city
One end of political affairs pipe network connection is to tilt down setting, and multiple inlet openings are offered on the first half pipe shaft of the drainpipe, institute
The outside for stating drainpipe is also wrapped with permeable layer；There are the more diversion pipes being vertically arranged in the pervious concrete layer, it is described to lead
Flow tube is in up-small and down-big truncated cone-shaped hollow pipe.
By using above-mentioned technical proposal, diversion pipe can provide a channel directly down for the ponding on road surface, add
The discharge of fast flow no longer only relies on the performance of pervious concrete itself；Storage cavity provides not only water-holding capacity, also can and
When adjust terrace humidity；Drainpipe is not only connected to storage cavity and city planting ductwork, and multiple water inlets also are provided on its pipe shaft
Hole strengthens the drainability of terrace entirety, can quickly drain the ponding on terrace.
The utility model is further arranged to：The storage cavity is concrete prefabricated finished product and roof is permeable coagulation
Soil is made, and interval is evenly arranged with multiple storage cavities in the pervious concrete layer, is additionally provided in the pervious concrete layer
Using the center line of storage cavity length direction as multiple water conservancy diversion slopes of symmetrical centre, the water conservancy diversion slope is obliquely installed and bottom end is solid
Surely it is connected on the roof side of storage cavity, and the roof of two water conservancy diversion slopes and storage cavity formation one is up big and down small
Inverted trapezoidal space, be collected in storage cavity convenient for moisture.
By using above-mentioned technical proposal, water conservancy diversion slope is obliquely installed into the rainwater-collecting space of up big and down small inverted trapezoidal,
Can the larger range of ponding by terrace surface collect to storage cavity.
The utility model is further arranged to：Waterproof geotextiles, the impermeable water and soil are equipped on the water conservancy diversion slope
Work cloth is fixed in pervious concrete layer.
By using above-mentioned technical proposal, fluid-tight geotextiles have the effect of that good drainage pours, can be saturating
It is tightly combined in water coagulation soil, is not easily susceptible to interfere, structure persistence is good and of low cost, is conducive to moisture leading into storage
In water cavity.
The utility model is further arranged to：The upper end of the diversion pipe is pierced by the porous pavement layer and is communicated in outside
The lower end in portion, the part diversion pipe is communicated in the storage cavity, and the lower end of diversion pipe described in rest part is in described
The surface of drainpipe.
By using above-mentioned technical proposal, the setting of diversion pipe can not only reinforce the bonding strength of pervious concrete layer,
Improve whole stress-bearing capability, and direct drainage channel provided for ponding, water can be drained into storage cavity or
The surface of drainpipe is drained into convenient for draining；Simultaneously in sunny weather, diversion pipe also functions to the effect for promoting airflow,
The tropical island effect in city can effectively be slowed down.
The utility model is further arranged to：The drainpipe is stretched to storage cavity junction part pipe shaft
In storage cavity and it which is provided with overflow mechanism, the overflow mechanism includes the sliding slot being opened on drainpipe and for blocking
The mechanism for opening/closing of the nozzle of drainpipe；The mechanism for opening/closing includes sliding the sliding panel connecting vertically with sliding slot and being connected to sliding
The water container of the opening upwards of plate lower end；A hollow float is connected on the sliding panel.
By using above-mentioned technical proposal, hollow float can float up under the drive of moisture, entire to drive
Mechanism for opening/closing moves upwards and then closes the nozzle of drainpipe, at this time the nozzle then water container due to water level higher than drainpipe
Interior to fill moisture, when water level decreasing to the height for being less than water container, the moisture in water container can be to entirely opening and closing
Mechanism effect has downward gravity, promotes mechanism for opening/closing to move downward and opens the nozzle of drainpipe, to complete to drainpipe
Nozzle keying control, so as to reduce the loss of moisture in storage cavity, can also prevent city planting ductwork to storage cavity
In the excess moisture poured in down a chimney.
The utility model is further arranged to：The section of the sliding panel and sliding slot is up-small and down-big trapezoidal；It is sliding
The trapezoidal waist of movable plate is identical as the trapezoidal waist gradient of sliding slot；It is provided with opening on the wall of drainpipe at the sliding slot upper and lower ends
And under shed；In the storage cavity vertically be equipped with guide rod, the sliding panel be sheathed on the guide rod and sliding panel with
Guide rod sliding connection.
By using above-mentioned technical proposal, sliding panel can vertically slide under the position-limiting action of guide rod, and
And the trapezoidal waist of sliding panel is identical as the trapezoidal waist gradient of sliding slot, so can be good at when sliding panel moves upwards with sliding slot to
It abuts, to reach the closed effect of the nozzle of drainpipe.
The utility model is further arranged to：The outer rim of the sliding panel, the sliding slot to be equipped with rubber close for inner edge
Strip of paper used for sealing, the trapezoidal tall and big trapezoidal height in sliding slot of the sliding panel.
By using above-mentioned technical proposal, due to the trapezoidal tall and big trapezoidal height in sliding slot of sliding panel, sliding panel exists
It is moved upwards under the drive of floating ball, upper opening can be pierced by when it offsets with sliding slot, reached the nozzle of entire drainpipe
Completely enclosed effect, and since the inner edge of the outer rim of sliding panel, the sliding slot is equipped with rubber weather strip, so as to realize
Good sealing effect.
The utility model is further arranged to：The guide rod is located at the position below sliding panel and is equipped with limiting plate, institute
It states distance of the limiting plate upper surface below drainpipe and is less than sliding panel height.
By using above-mentioned technical proposal, limiting plate is set and the upper end identity distance below feed pipe with a distance from be less than sliding
Plate height can then ensure that when sliding panel declines under the action of water container sliding slot will not be completely disengaged, ensure that on next time
It can also coordinate with sliding slot when floating and close the nozzle of drainpipe.
The utility model is further arranged to：The permeable layer is spongy layer, is wrapped on the overall length pipe shaft of drainpipe.
By using above-mentioned technical proposal, be provided with spongy layer and be wrapped in outside drainpipe, can effectively place soil or
Sandstone will intake hole plug, be conducive to the smooth draining of drainpipe, accelerate the quick discharge of terrace surface ponding.
In conclusion the utility model has the advantages that：Diversion pipe can provide one directly for the ponding on road surface
Downward channel is connect, the discharge of flow is accelerated, no longer only relies on the performance of pervious concrete itself, and the effect class of diversion pipe
It is similar to the vertical reinforced of reinforcing bar, the intensity and bearing capacity of terrace can be reinforced；Storage cavity provides not only water-holding capacity, also can
The humidity of terrace is adjusted in time；Drainpipe is not only connected to storage cavity and city planting ductwork, and also be provided on its pipe shaft it is multiple into
Water hole strengthens the drainability of terrace entirety, can quickly drain the ponding on terrace.
Description of the drawings
Fig. 1 is the whole cross-sectional view of the present embodiment；
Fig. 2 is the structure chart of overflow mechanism in the present embodiment.
In figure：1, plain soil layer；11, macadam gradating layer；12, pervious concrete layer；121, water conservancy diversion slope；13, porous pavement layer；
2, drainpipe；21, inlet opening；22, spongy layer；23, sliding slot；24, upper opening；25, under shed；3, storage cavity；4, diversion pipe；
5, sliding panel；51, hollow float；6, water container；7, guide rod；8, limiting plate；9, city planting ductwork.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.
Specific embodiment is only the explanation to the utility model, is not limitations of the present invention, this field
Technical staff can as needed make the present embodiment the modification of not creative contribution after reading this specification, but only
It all to be protected by Patent Law in the right of the utility model.
Embodiment：A kind of permeable terrace, as shown in Figure 1, including the soil layer 1, macadam gradating layer 11, permeable of being always or usually as specified from bottom to top
Concrete layer 12, porous pavement layer 13.
As shown in Figure 1, being provided with multiple evenly spaced storage cavities 3, the top of storage cavity 3 in pervious concrete layer 12
Wall uses pervious concrete pouring molding, and multiple water conservancy diversion slopes 121 are additionally provided in pervious concrete layer 12,121 upper berth of water conservancy diversion slope
Equipped with waterproof geotextiles, to play the role of the drainage to penetrating into the moisture inside terrace.Water conservancy diversion slope 121 be obliquely installed and
Using the center line of storage cavity 3 as symmetrical centre, lower end is connected to the side of the roof of storage cavity 3, to storage cavity 3
Roof and a pair of symmetrically arranged water conservancy diversion slope can form up big and down small inverted trapezoidal space, convenient for penetrating into the water inside terrace
Divide and collects into storage cavity 3.
As shown in Figure 1, macadam gradating layer 11 and 12 intersection of pervious concrete layer are equipped with more drainpipes 2, drainpipe 2
One end is communicated in storage cavity 3, and the other end is communicated in city planting ductwork 9, drainpipe 2 from the one end being connect with storage cavity 3 to
The one end being connected to city planting ductwork 9 is to tilt down setting, and multiple inlet openings are offered on the first half pipe shaft of drainpipe 2
21, the outside of drainpipe 2 is also wrapped with spongy layer 22.
As shown in Figure 1, multiple diversion pipes 4 being vertically arranged are additionally provided in pervious concrete layer 12,4 hollow setting of diversion pipe
And be up-small and down-big truncated cone-shaped, 4 upper and lower ends of diversion pipe are opening setting, and the upper end is communicated on porous pavement layer 13
Outside, the lower end of diversion pipe 4 has part to be communicated in inside storage cavity 3, and rest part is in the surface of drainpipe 2.
As depicted in figs. 1 and 2, the moisture in city planting ductwork 9 is flow backwards into storage cavity 3 in order to prevent, while also being reduced
One section of pipe shaft inside storage cavity 3 is stretched into the evaporation of moisture in storage cavity 3, the part that drainpipe 2 is connected to storage cavity 3
It is equipped with overflow mechanism.
As depicted in figs. 1 and 2, overflow mechanism includes the sliding slot 23 being opened on drainpipe 2 and for blocking drainpipe 2
Nozzle mechanism for opening/closing, mechanism for opening/closing include with sliding slot 23 vertically sliding connection sliding panel 5 and be connected to 5 lower end of sliding panel
Opening upwards water container 6.The section of sliding panel 5 and sliding slot 23 is up-small and down-big trapezoidal, the trapezoidal waist of sliding panel 5
It is identical as the trapezoidal waist gradient of sliding slot 23, opening 24 and under shed are provided on the wall of the drainpipe 2 at 23 upper and lower ends of sliding slot
25, guide rod 7 is equipped in storage cavity 3 vertically, sliding panel 5 is sheathed on guide rod 7 and sliding panel 5 connects with the sliding of guide rod 7
It connects.The outer rim of sliding panel 5 and the inner edge of sliding slot 23 are equipped with rubber weather strip so that can and be slided after 5 upward sliding of sliding panel
Slot 23 closely abuts, the trapezoidal tall and big trapezoidal height in sliding slot 23 of sliding panel 5, and then ensures that sliding panel 5 can be by drainpipe 2
Ferrule.
As depicted in figs. 1 and 2, it is also connected with a hollow float 51 on sliding panel 5, is slided for being driven when by moisture buoyancy
5 upward sliding of movable plate.Meanwhile guide rod 7 is located at the position of 5 lower section of sliding panel equipped with limiting plate 8,8 upper surface distance of limiting plate
The distance of 2 lower section of drainpipe is less than 5 height of sliding panel, to make when sliding panel 5 falls under the action of water container 6
Sliding panel 5 completely disengages sliding slot 23.
The operation principle of the present embodiment is：When there is a large amount of ponding on terrace, a part pervious concrete layer 12 from
It is permeated downwards under body water permeability, another part is directly flowed downward by diversion pipe 4, due to the big portion of the setting on water conservancy diversion slope 121
Divide moisture that can enter in storage cavity 3, fraction enters through inlet opening 21 in drainpipe 2, is directly discharged in city planting ductwork 9.
When moisture rises steadily in storage cavity 3, floating ball and water container 6 is driven to float, to drive sliding panel 5 along leading
To 7 upward sliding of bar, until sliding panel 5 is closely connected to the both sides of sliding slot 23, the upper end of sliding panel 5 is pierced by opening at this time
24, sliding panel 5 closes the nozzle of drainpipe 2, ensures that in storage cavity 3 enough moisture can be stored.
It being oozed under moisture continues after storage cavity 3 reaches amount of storage, moisture overflows outward along the roof of storage cavity 3,
And drainpipe 2 is entered by inlet opening 21, it is immediately discharged in city planting ductwork 9.When fine, moisture is timely in storage cavity 3
Volatilization achievees the effect that adjust terrace dry and wet degree, link urban heat land effect.
Claims (9)
- Include plain soil layer (1) from bottom to top, macadam gradating layer (11), pervious concrete layer (12), permeable 1. a kind of permeable terrace Supercrust (13), it is characterised in that：The macadam gradating layer（11）It is equipped with the pervious concrete layer (12) intersection more Root drainpipe (2), described drainpipe (2) one end are communicated with the storage cavity (3) being set in pervious concrete layer (12), and another One end is communicated in city planting ductwork (9), and the drainpipe (2) connects from the one end being connect with storage cavity (3) to city planting ductwork (9) Logical one end is to tilt down setting, and multiple inlet openings (21) are offered on the first half pipe shaft of the drainpipe (2), described The outside of drainpipe (2) is also wrapped with permeable layer；There are the more diversion pipes being vertically arranged in the pervious concrete layer (12) (4), the diversion pipe (4) is in up-small and down-big truncated cone-shaped hollow pipe.
- 2. a kind of permeable terrace according to claim 1, it is characterised in that：The storage cavity (3) is concrete prefabricated Finished product and roof is made of pervious concrete, interval is evenly arranged with multiple storage cavities in the pervious concrete layer (12) (3), it is additionally provided with using the center line of storage cavity (3) length direction as the multiple of symmetrical centre in the pervious concrete layer (12) Water conservancy diversion slope (121), the water conservancy diversion slope (121) is obliquely installed and bottom end is fixedly connected on the roof side of storage cavity (3), And the roof of two water conservancy diversion slopes (121) and storage cavity (3) forms a up big and down small inverted trapezoidal space, is convenient for moisture It is collected in storage cavity (3).
- 3. a kind of permeable terrace according to claim 2, it is characterised in that：It is equipped on the water conservancy diversion slope (121) impermeable Water geotextiles, the waterproof geotextiles are fixed in pervious concrete layer (12).
- 4. a kind of permeable terrace according to claim 1, it is characterised in that：The upper end of the diversion pipe (4) is pierced by described Porous pavement layer (13) is communicated in outside, and the lower end of diversion pipe (4) described in rest part is communicated in the storage cavity（3）It is interior, The lower end of the part diversion pipe (4) is in the surface of the drainpipe (2).
- 5. a kind of permeable terrace according to claim 1, it is characterised in that：The drainpipe (2) and the storage cavity 3 Junction part pipe shaft stretches to storage cavity（3）Interior and which is provided with overflow mechanism, the overflow mechanism includes the row of being opened in The mechanism for opening/closing of sliding slot (23) on water pipe (2) and the nozzle for blocking drainpipe (2)；The mechanism for opening/closing includes and cunning Slot (23) slides the water container (6) of the sliding panel (5) of connection and the opening upwards for being connected to sliding panel (5) lower end vertically；Institute It states and connects a hollow float (51) on sliding panel (5).
- 6. a kind of permeable terrace according to claim 5, it is characterised in that：Section of the sliding panel (5) and sliding slot (23) Face is up-small and down-big trapezoidal；The trapezoidal waist of sliding panel (5) is identical as the trapezoidal waist gradient of sliding slot (23)；The sliding slot (23) It is provided with opening (24) and under shed (25) on the wall of drainpipe (2) at upper and lower ends；The storage cavity（3）It is interior to set vertically There is guide rod (7), the sliding panel (5) is sheathed on the guide rod (7) and sliding panel (5) is connected with guide rod (7) sliding.
- 7. a kind of permeable terrace according to claim 6, it is characterised in that：The outer rim of the sliding panel (5), the sliding slot (23) inner edge is equipped with rubber weather strip, the trapezoidal tall and big trapezoidal height in sliding slot (23) of the sliding panel (5).
- 8. a kind of permeable terrace according to claim 7, it is characterised in that：The guide rod (7) is located under sliding panel (5) The position of side is equipped with limiting plate (8), and distance of limiting plate (8) upper surface below drainpipe (2) is less than sliding panel (5) Highly.
- 9. a kind of permeable terrace according to claim 1, it is characterised in that：The permeable layer is spongy layer (22), package In on the overall length pipe shaft of drainpipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721659735.0U CN207619765U (en) | 2017-12-01 | 2017-12-01 | A kind of permeable terrace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721659735.0U CN207619765U (en) | 2017-12-01 | 2017-12-01 | A kind of permeable terrace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207619765U true CN207619765U (en) | 2018-07-17 |
Family
ID=62825249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721659735.0U Expired - Fee Related CN207619765U (en) | 2017-12-01 | 2017-12-01 | A kind of permeable terrace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207619765U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109487657A (en) * | 2018-12-28 | 2019-03-19 | 温州宏伟建设有限公司 | A kind of road drainage structure |
| CN109629368A (en) * | 2018-12-25 | 2019-04-16 | 花王生态工程股份有限公司 | A kind of dewatering type urban road and its construction method |
| CN111424494A (en) * | 2020-04-04 | 2020-07-17 | 山西省交通科技研发有限公司 | Multifunctional pavement paving system based on sponge city |
| CN111424493A (en) * | 2020-04-04 | 2020-07-17 | 山西省交通科技研发有限公司 | Sponge city-based water permeating-water storing-draining type green paving system |
| CN111549612A (en) * | 2020-05-21 | 2020-08-18 | 中建水务环保有限公司 | Permeable transformation technology for impervious concrete pavement |
| CN112681043A (en) * | 2020-12-18 | 2021-04-20 | 湖北省路桥集团有限公司 | Roadbed splicing and widening structure and construction method |
-
2017
- 2017-12-01 CN CN201721659735.0U patent/CN207619765U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109629368A (en) * | 2018-12-25 | 2019-04-16 | 花王生态工程股份有限公司 | A kind of dewatering type urban road and its construction method |
| CN109487657A (en) * | 2018-12-28 | 2019-03-19 | 温州宏伟建设有限公司 | A kind of road drainage structure |
| CN111424494A (en) * | 2020-04-04 | 2020-07-17 | 山西省交通科技研发有限公司 | Multifunctional pavement paving system based on sponge city |
| CN111424493A (en) * | 2020-04-04 | 2020-07-17 | 山西省交通科技研发有限公司 | Sponge city-based water permeating-water storing-draining type green paving system |
| CN111549612A (en) * | 2020-05-21 | 2020-08-18 | 中建水务环保有限公司 | Permeable transformation technology for impervious concrete pavement |
| CN112681043A (en) * | 2020-12-18 | 2021-04-20 | 湖北省路桥集团有限公司 | Roadbed splicing and widening structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207619765U (en) | A kind of permeable terrace | |
| CN208777413U (en) | A kind of ecological type landscape ditch | |
| CN209293141U (en) | Water permeable sidewalk drainage system in sponge city | |
| CN208996164U (en) | Sponge urban road drainage system | |
| CN209323301U (en) | A kind of novel sponge urban pavement structure | |
| CN207619770U (en) | A kind of permeable terrace of Quick drainage | |
| CN209653243U (en) | A kind of green building roof of waterproof | |
| CN207079439U (en) | A kind of environment friendly pervious terrace | |
| CN207633158U (en) | A kind of urban road drainage system | |
| CN209482092U (en) | Suitable for the sponge city system of biological stranded belt is arranged outside town road red line | |
| CN209636585U (en) | A kind of pavement grass planting ditch | |
| CN208310014U (en) | A kind of insulating water-proof ecology pitched roof | |
| CN208267053U (en) | A kind of sponge urban rainwater garden | |
| CN206737077U (en) | A kind of eco-drainage ditch for cell | |
| CN206385415U (en) | A kind of permeable road structure in environmentally friendly gardens | |
| CN204589953U (en) | A kind of Dry Farmland gutter of single-side drainage | |
| CN209923727U (en) | Plastic track with water seepage function | |
| CN208578268U (en) | A kind of ladder prefabricated component with discharge pipe line | |
| CN209368986U (en) | A kind of ecotype gutter | |
| CN207619772U (en) | A kind of sponge urban water-through terrace | |
| CN209636586U (en) | A kind of siphon drainage device suitable for cavernous body urban design | |
| CN207659819U (en) | A kind of sponge urban ecology square road foundation structure | |
| CN206859534U (en) | A kind of roof drainage system | |
| CN206337623U (en) | A kind of ground water permeable device for sponge city | |
| CN111101589A (en) | Ecological drainage system of afforestation maintenance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180717 Termination date: 20181201 |