CN217336604U - Greening protective structure for high-rise building - Google Patents

Greening protective structure for high-rise building Download PDF

Info

Publication number
CN217336604U
CN217336604U CN202221287080.XU CN202221287080U CN217336604U CN 217336604 U CN217336604 U CN 217336604U CN 202221287080 U CN202221287080 U CN 202221287080U CN 217336604 U CN217336604 U CN 217336604U
Authority
CN
China
Prior art keywords
water
planting
groove
box
water collecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202221287080.XU
Other languages
Chinese (zh)
Inventor
庄庆鹏
庄小发
刘碧丹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Jing Yuan Da Construction And Decoration Co ltd
Original Assignee
Shenzhen Jing Yuan Da Construction And Decoration Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Jing Yuan Da Construction And Decoration Co ltd filed Critical Shenzhen Jing Yuan Da Construction And Decoration Co ltd
Priority to CN202221287080.XU priority Critical patent/CN217336604U/en
Application granted granted Critical
Publication of CN217336604U publication Critical patent/CN217336604U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/32Roof garden systems

Landscapes

  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Abstract

The application discloses a greening protective structure for high-rise buildings, which relates to the related technical field of greening protection and comprises a planting box, planting soil is placed in the planting box, a first protective net is placed on the upper surface of the planting soil, a ceramsite layer is laid on the upper surface of the first protective net, a second protective net is placed on the upper surface of the ceramsite layer, a limiting hook is uniformly and fixedly connected to the inner wall of the planting box, the limiting hook and the second protective net are mutually clamped, when the greening protective structure is used, the root of a green plant is planted in the planting soil, the leaf part of the green plant penetrates through the first protective net, the ceramsite layer and the second protective net and is positioned above the second protective net, the limiting hook is clamped with the second protective net, the limiting hook can limit the position of the second protective net, the second protective net is prevented from falling off as far as possible, when the first protective net is matched with the ceramsite layer and the second protective net, the position of the root of the green plant can be limited, thereby avoid green vegetation wind to blow down as far as possible, make this application do benefit to the use more.

Description

Greening protective structure for high-rise building
Technical Field
The application relates to the technical field related to greening protection, in particular to a greening protection structure for high-rise buildings.
Background
The greening widely refers to planting flowers, plants and trees, so that the environment is beautiful and sanitary, and water and soil loss is prevented; planting flowers and plants of trees. Greening improves environmental hygiene and plays a variety of roles in maintaining ecological balance. With the advance of the urbanization process, the floors are higher and higher, and the land utilization rate is increased, so that the buildings are more and more built, and the building is higher. Under the development trend of the times, the traditional urban greening mode can not meet the requirement of urban green development, and people start to consciously try new greening modes under the pursuit of green healthy life. Wherein, the high-rise greening becomes an innovative mode which can solve the contradiction between land shortage and urban greening rate guarantee.
The existing plants for greening the high-rise building are generally directly planted in soil, and due to the flexibility of the soil, the plants are easily blown down by wind in windy weather.
SUMMERY OF THE UTILITY MODEL
In order to solve the plant of current high-rise building afforestation generally directly to plant in earth, because the compliance of earth, the problem that the plant was blown down by wind easily when meetting strong wind weather, this application provides a high-rise building afforestation protective structure.
The application provides a high-rise building afforestation protective structure adopts following technical scheme:
the utility model provides a high-rise building afforestation protective structure, includes plants the box, planting soil has been placed to the inside of planting the box, first protection network has been placed to the upper surface of planting soil, the ceramsite layer has been laid to the upper surface of first protection network, the second protection network has been placed to the upper surface on ceramsite layer, the even fixedly connected with spacing hook of inner wall of planting the box, spacing hook with mutual joint between the second protection network.
Through adopting above-mentioned technical scheme, the position of second protection network can be restricted to spacing hook to avoid the second protection network to drop as far as possible, green planting back, the root of green planting is located the inside of planting soil, first protection network is passed at the leaf position of green planting, haydite layer and second protection network are located the top of second protection network, first protection network and haydite layer and second protection network cooperation can restrict the green position of planting the root when meetting strong wind weather, thereby avoid green vegetation wind to blow down as far as possible.
Optionally, the planting box comprises a rectangular box, the upper surface of the rectangular box is provided with a planting groove, the planting soil, the first protective net, the ceramsite layer, the second protective net and the limiting hook are all positioned inside the planting groove, the upper surface of the rectangular box is provided with an arc-shaped water collecting groove, the interior of the rectangular box is provided with a water collecting hole, the water collecting hole is positioned below the arc-shaped water collecting groove and communicated with the arc-shaped water collecting groove, a water collecting groove is arranged in the rectangular box and is positioned below the water collecting hole, the water collecting tank is communicated with the water collecting holes, the inside of the rectangular box is evenly provided with water permeable holes, the water permeable holes are positioned below the planting grooves and communicated with the planting grooves, the water permeable holes are located above the water collecting tank and communicated with the water collecting tank.
Through adopting above-mentioned technical scheme, the collection to the rainwater can be accelerated to the arc water collecting tank when raining, and the inside that the rainwater transmission that the water collecting tank was collected through the arc water collecting tank can be collected to the water catch hole, and the hole of permeating water makes water catch tank and planting groove intercommunication, makes the inside unnecessary water of planting inslot portion can flow into the inside in the hole of permeating water.
Optionally, the cotton layer of moisturizing has been placed to the inside of rectangle box, the cotton layer of moisturizing is located the inside of planting the groove, the cotton layer of moisturizing is located plant soil with between the hole of permeating water.
By adopting the technical scheme, the water-retaining cotton layer has a certain water-retaining effect, and the water-retaining time of the planting soil is prolonged as much as possible.
Optionally, a first drainage hole is formed in the rectangular box, the first drainage hole is located between the planting groove and the water collecting groove, the first drainage hole is communicated with the planting groove and the water collecting groove respectively, a second drainage hole is formed in one side of the rectangular box, the second drainage hole is communicated with the water collecting groove, and the second drainage hole and the first drainage hole are located on the same horizontal plane.
Through adopting above-mentioned technical scheme, first wash port can be when planting the inside water of inslot too much with the inside of unnecessary water drainage water catch bowl, and the second wash port can be when the inside water of water catch bowl is too much outwards discharged water.
Optionally, the inside fixedly connected with gusset plate of rectangle box, the gusset plate is located the inside of water catch bowl, evenly set up on the gusset plate with the limbers that the gusset plate runs through.
Through adopting above-mentioned technical scheme, the gusset plate can consolidate the inside of rectangle box, and the intensity of maximize rectangle box reduces the percentage of damage of rectangle box.
Optionally, the lower fixed surface on cotton layer of moisturizing is connected with first spacing net, first spacing net is located the top in the hole of permeating water, the last fixed surface on cotton layer of moisturizing is connected with the spacing net of second, the spacing net of second is located the below of planting soil.
Through adopting above-mentioned technical scheme, the position on cotton layer is protected to first spacing net and the spacing net of second can restrict to keep water, avoids the inside that the batting on the cotton layer of protecting water gets into the water catch bowl through the hole of permeating water as far as possible.
Optionally, the inside fixedly connected with filter screen of rectangle box, the filter screen is located the inside in first drainage hole.
Through adopting above-mentioned technical scheme, the filter screen can avoid planting soil to follow the inside that rivers flowed into the water catch bowl as far as possible.
Optionally, the even fixedly connected with of lower surface on guarantor's water cotton layer absorbs water the silver, it keeps away from to absorb water the silver the one end on guarantor's water cotton layer runs through first spacing net with the rectangle box is located the inside of water catch bowl.
Through adopting above-mentioned technical scheme, the cotton sliver that absorbs water can convey the inside water of water catch bowl and keep the humidity of planting soil in the cotton layer of moisturizing.
Compared with the prior art, the beneficial effects of this application are:
1. the planting box is used for placing planting soil, the planting soil is used for planting green plants, the first protective net and the second protective net are matched to limit the position of a ceramsite layer, the ceramsite layer can reduce the loss of the planting soil during wind blowing, the limiting hook can limit the position of the second protective net, so that the second protective net is prevented from falling off as much as possible, the roots of the green plants are located inside the planting soil after the green plants are planted, the leaf parts of the green plants penetrate through the first protective net, the ceramsite layer and the second protective net and are located above the second protective net, and the first protective net, the ceramsite layer and the second protective net are matched to limit the positions of the roots of the green plants when the green plants meet high wind weather, so that green vegetation is prevented from falling off as much as possible, and the planting box is more beneficial to use;
2. the planting groove can limit the positions of planting soil, a first protective net, a ceramsite layer, a second protective net and a limiting hook, the arc-shaped water collecting groove can accelerate the collection of rainwater in the rainy period, rainwater collected through the arc-shaped water collecting groove can be transmitted into the water collecting groove through the water collecting holes to be collected, the water collecting groove is communicated with the planting groove through the water permeable holes, redundant water in the planting groove can flow into the water permeable holes, and the redundant water in the water permeable holes can also enter the planting groove when the water in the water permeable holes is excessive;
3. the cotton layer of moisturizing that this application set up has certain water retention effect, and the moisture time of planting soil is prolonged as far as possible, and the cotton layer's of moisturizing position can be restricted to first spacing net and the spacing net of second, avoids moisturizing cotton layer as far as possible after long-time use, and the inside of the cotton wool on the cotton layer of moisturizing gets into the water catch bowl through the hole of permeating water. The arranged water-absorbing cotton strip has a certain water-absorbing function, and can transmit water in the water collecting tank into the water-retaining cotton layer to keep the humidity of the planting soil.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a cross-sectional structural schematic of the present application;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
fig. 4 is an enlarged schematic view of the structure at B in fig. 2 in the present application.
Description of reference numerals: 1. planting boxes; 101. a rectangular box; 102. planting a groove; 103. an arc-shaped water collecting tank; 104. a water collection hole; 105. a water collection tank; 106. water permeable holes; 2. planting soil; 3. a first protection net; 4. a ceramic layer; 5. a second protective net; 6. a limiting hook; 7. a first limiting net; 8. a water-retaining cotton layer; 9. a second limiting net; 10. a water-absorbing cotton sliver; 11. a first drain hole; 12. a second drain hole; 13. a reinforcing plate; 14. a water through hole; 15. and (4) a filter screen.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The application provides following technical scheme, please refer to fig. 1, fig. 2 and fig. 3, this high-rise building afforestation protective structure, including planting box 1, planting soil 2 has been placed to the inside of planting box 1, planting soil 2 is used for planting green planting, first protection network 3 has been placed to the upper surface of planting soil 2, ceramsite layer 4 has been laid to the upper surface of first protection network 3, ceramsite layer 4 has the special construction porous, the matter is light, surface strength is high, the moisture demand of plant has been satisfied promptly, the ventilative requirement has also been satisfied simultaneously, can also reduce the loss of planting soil 2 when scraping the wind. Second protection network 5 has been placed to the upper surface on haydite layer 4, first protection network 3 can restrict haydite layer 4's position with the cooperation of second protection network 5, plant the even fixedly connected with limit hook 6 of inner wall of box 1, mutual joint between limit hook 6 and the second protection network 5, limit hook 6 can restrict second protection network 5's position, thereby avoid second protection network 5 to drop as far as possible, the green back of planting, the root of planting is located the inside of planting soil 2, the leafy position of green planting passes first protection network 3, haydite layer 4 and second protection network 5 are located the top of second protection network 5, when meetting windy weather, first protection network 3 can restrict green root's position with haydite layer 4 and the cooperation of second protection network 5, thereby avoid the vegetation wind to blow down as far as possible, make this application do benefit to the use more.
Referring to fig. 1, 2 and 3, the planting box 1 includes a rectangular box 101, a planting groove 102 is formed on the upper surface of the rectangular box 101, planting soil 2, a first protection net 3, a ceramsite layer 4, second protection network 5 and spacing hook 6 all are located the inside of planting groove 102, it can restrict planting soil 2 to plant groove 102, first protection network 3, haydite layer 4, the position of second protection network 5 and spacing hook 6, arc water collecting tank 103 has been seted up to the upper surface of rectangle box 101, arc water collecting tank 103 can accelerate the collection to the rainwater when raining, water collecting hole 104 has been seted up to the inside of rectangle box 101, water collecting hole 104 is located the below of arc water collecting tank 103, water collecting hole 104 is linked together with arc water collecting tank 103, water collecting tank 105 has been seted up to the inside of rectangle box 101, water collecting tank 105 is located the below of water collecting hole 104, water collecting tank 105 is linked together with water collecting hole 104, water collecting hole 104 can collect the inside of rainwater transmission into water collecting tank 105 that collects through arc water collecting tank 103. The hole 106 of permeating water has evenly been seted up in the inside of rectangle box 101, the hole 106 of permeating water is located the below of planting groove 102, the hole 106 of permeating water is linked together with planting groove 102, the hole 106 of permeating water is located the top of water catch bowl 105, the hole 106 of permeating water is linked together with water catch bowl 105, the hole 106 of permeating water makes water catch bowl 105 and planting groove 102 intercommunication, make the inside that the inside surplus water of planting groove 102 can flow into the hole 106 of permeating water, also can get into the inside of planting groove 102 when the inside water of hole 106 of permeating water is too much.
Please refer to fig. 2 and 4, the water-retaining cotton layer 8 is placed inside the rectangular box 101, the water-retaining cotton layer 8 is located inside the planting groove 102, the water-retaining cotton layer 8 is located between the planting soil 2 and the water-permeable hole 106, and the water-retaining cotton layer 8 has a certain water-retaining effect, so that the water-retaining time of the planting soil 2 can be prolonged as much as possible.
Please refer to fig. 2 and 4, the lower fixed surface of guarantor's cotton layer 8 is connected with first spacing net 7, first spacing net 7 is located the top of the hole 106 of permeating water, the last fixed surface of guarantor's cotton layer 8 is connected with the spacing net 9 of second, the spacing net 9 of second is located the below of planting soil 2, first spacing net 7 and the spacing net 9 of second can restrict guarantor's cotton layer 8's position, avoid guarantor's cotton layer 8 through long-time use back as far as possible, the batting on the guarantor's cotton layer 8 gets into the inside of water catch bowl 105 through the hole 106 of permeating water.
Referring to fig. 2 and 4, the lower surface of the water retention cotton layer 8 is uniformly and fixedly connected with the absorbent cotton strips 10, one end of the absorbent cotton strips 10, which is far away from the water retention cotton layer 8, penetrates through the first limiting net 7 and the rectangular box 101 and is located inside the water collecting tank 105, and the absorbent cotton strips 10 have a certain water absorption function and can transmit water inside the water collecting tank 105 into the water retention cotton layer 8 to keep the humidity of the planting soil 2.
Referring to fig. 1 and 2, a first drainage hole 11 is formed in a rectangular box 101, the first drainage hole 11 is located between a planting groove 102 and a water collecting groove 105, the first drainage hole 11 is respectively communicated with the planting groove 102 and the water collecting groove 105, the first drainage hole 11 can drain excessive water into the water collecting groove 105 when the water in the planting groove 102 is excessive, a second drainage hole 12 is formed in one side of the rectangular box 101, the second drainage hole 12 is communicated with the water collecting groove 105, the second drainage hole 12 and the first drainage hole 11 are located on the same horizontal plane, and the second drainage hole 12 can drain the water outwards when the water in the water collecting groove 105 is excessive.
Referring to fig. 2, the filter screen 15 is fixedly connected to the inside of the rectangular box 101, the filter screen 15 is located inside the first drainage hole 11, and the filter screen 15 has a certain filtering effect, so that the condition that the planting soil 2 flows into the water collecting tank 105 along with the water flow is avoided as much as possible, and the soil loss is reduced.
Referring to fig. 2, a reinforcing plate 13 is fixedly connected to the inside of the rectangular box 101, the reinforcing plate 13 is located inside the water collecting tank 105, and the top of the reinforcing plate 13 abuts against the planting groove 102. The reinforcing plate 13 can reinforce the inside of the rectangular box 101, the strength of the rectangular box 101 is increased as much as possible, the breakage rate of the rectangular box 101 is reduced, the reinforcing plate 13 is uniformly provided with the water through holes 14 penetrating the reinforcing plate 13, and the water through holes 14 enable water in the water collecting tank 105 to pass through the reinforcing plate 13.
The implementation principle of the high-rise building greening protective structure provided by the embodiment of the application is as follows:
during the use, the root of green planting is planted in the inside of planting soil 2, first protection network 3 is passed at the green vanning position of planting, haydite layer 4 and second protection network 5 are located the top of second protection network 5, spacing hook 6 and 5 joints of second protection network, spacing hook 6 can restrict the position of second protection network 5, avoid second protection network 5 to drop as far as possible, first protection network 3 can restrict the green position of planting the root with haydite layer 4 and the cooperation of second protection network 5 when meetting strong wind weather, thereby avoid green vegetation wind to fall as far as possible, make this application do benefit to the use more.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A high-rise building greening protective structure is characterized by comprising:
planting box (1), planting soil (2) have been placed to the inside of planting box (1), first protection network (3) have been placed to the upper surface of planting soil (2), ceramsite layer (4) have been laid to the upper surface of first protection network (3), second protection network (5) have been placed to the upper surface of ceramsite layer (4), the even fixedly connected with limit hook (6) of inner wall of planting box (1), limit hook (6) with mutual joint between second protection network (5).
2. The greening and protecting structure for the high-rise building, according to claim 1, is characterized in that: the planting box (1) comprises a rectangular box (101), a planting groove (102) is formed in the upper surface of the rectangular box (101), planting soil (2), the first protective net (3), the ceramsite layer (4), the second protective net (5) and the limiting hook (6) are located inside the planting groove (102), an arc-shaped water collecting groove (103) is formed in the upper surface of the rectangular box (101), water collecting holes (104) are formed in the rectangular box (101), the water collecting holes (104) are located below the arc-shaped water collecting groove (103), the water collecting holes (104) are communicated with the arc-shaped water collecting groove (103), a water collecting groove (105) is formed in the rectangular box (101), the water collecting groove (105) is located below the water collecting holes (104), and the water collecting groove (105) is communicated with the water collecting holes (104), the inside of rectangle box (101) has evenly seted up hole (106) of permeating water, it is located to permeate water hole (106) the below of planting groove (102), permeate water hole (106) with plant groove (102) and be linked together, it is located to permeate water hole (106) the top of water catch bowl (105), permeate water hole (106) with water catch bowl (105) are linked together.
3. The greening protective structure for high-rise buildings according to claim 2, characterized in that: water retention cotton layer (8) have been placed to the inside of rectangle box (101), water retention cotton layer (8) are located plant the inside of groove (102), water retention cotton layer (8) are located plant soil (2) with between hole (106) of permeating water.
4. The greening protective structure for high-rise buildings according to claim 2, characterized in that: first wash port (11) have been seted up to the inside of rectangle box (101), first wash port (11) are located plant groove (102) with between water catch bowl (105), first wash port (11) respectively with plant groove (102) with water catch bowl (105) are linked together, second wash port (12) have been seted up to one side of rectangle box (101), second wash port (12) with water catch bowl (105) are linked together, second wash port (12) with first wash port (11) are located same horizontal plane.
5. The greening protective structure for high-rise buildings according to claim 2, characterized in that: the inside fixedly connected with reinforcing plate (13) of rectangle box (101), reinforcing plate (13) are located the inside of water catch bowl (105), evenly seted up on reinforcing plate (13) with limbers (14) that reinforcing plate (13) run through.
6. A high-rise building greening protective structure as claimed in claim 3, wherein: keep the first spacing net (7) of lower fixed surface of cotton layer (8) of water conservation, first spacing net (7) are located the top of hole (106) of permeating water, the last fixed surface of cotton layer (8) of water conservation is connected with the spacing net of second (9), the spacing net of second (9) are located the below of planting soil (2).
7. The greening protective structure for high-rise buildings according to claim 4, characterized in that: the inside fixedly connected with filter screen (15) of rectangle box (101), filter screen (15) are located the inside of first drainage hole (11).
8. The greening protective structure for high-rise buildings according to claim 6, characterized in that: the even fixedly connected with of lower surface on cotton layer (8) of moisturizing has absorbent cotton sliver (10), absorbent cotton sliver (10) are kept away from the one end on cotton layer (8) of moisturizing runs through first spacing net (7) with rectangle box (101) are located the inside of water catch bowl (105).
CN202221287080.XU 2022-05-26 2022-05-26 Greening protective structure for high-rise building Active CN217336604U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202221287080.XU CN217336604U (en) 2022-05-26 2022-05-26 Greening protective structure for high-rise building

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221287080.XU CN217336604U (en) 2022-05-26 2022-05-26 Greening protective structure for high-rise building

Publications (1)

Publication Number Publication Date
CN217336604U true CN217336604U (en) 2022-09-02

Family

ID=83015208

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202221287080.XU Active CN217336604U (en) 2022-05-26 2022-05-26 Greening protective structure for high-rise building

Country Status (1)

Country Link
CN (1) CN217336604U (en)

Similar Documents

Publication Publication Date Title
CN211228545U (en) Road side slope greening drainage structure
CN109121829B (en) Have concurrently and vwatch and environmental greening's sponge city ecological landscape wall body
CN209693590U (en) Improved roof greening structure
CN212926767U (en) Green building energy-saving wall
CN108360761A (en) A kind of roof planting method of rainwater utilization and the water-saving control root of off-load
CN205017932U (en) Water -saving type environment -friendly roof greening device
CN107989282A (en) Afforest drainage arrangement
CN110424494A (en) A kind of sponge Greening Urban Road isolation strip green space system
CN208523308U (en) A kind of ecology tree pond construction
CN101288379A (en) Fruit garden rain collecting and water saving micro irrigation method
CN217336604U (en) Greening protective structure for high-rise building
CN209330696U (en) A kind of garden landscape ecological greening device
CN208639111U (en) A kind of combined wall afforestation equipment
CN209572553U (en) A kind of water and soil interlayer automatic ink-suction profit root flowerpot
CN204741990U (en) Monomer is laid in roadside greening
CN215992220U (en) Roof three-dimensional greening circulation system
CN107624439A (en) A kind of roof greening water storage box
CN210216061U (en) Municipal garden greening brick convenient to change afforestation plant soil
CN209251212U (en) A kind of double film heliogreenhouses
CN208285968U (en) Light roofing ecological greening device with water collecting function
CN206078250U (en) From feedwater type trackside nursery stock environmental greening structure
CN106717903B (en) A kind of novel combination type matrix connection roof greening cabinet
CN216587383U (en) Building roof structure
CN207460921U (en) A kind of roof greening water storage box
CN214126316U (en) Roof greening waterproof device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant