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A large-capacity roof green storage and drainage board
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A roof greening, storage and drainage technology, applied in the direction of roof drainage, roof, roof covering, etc., can solve the problems of easily blocked drainage channels, underutilized water, dry plants and death, so as to improve the survival rate of plants and reduce irrigation and maintenance costs, and the effect of large water storage capacity
Active Publication Date: 2019-04-09
重庆市环境科学研究院
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This may cause the water storage capacity to be too small to meet the needs of plants, and the plants will dry up and die; when water is stored, some water storage cups are full and overflow, while some have not yet collected rainwater; when water is used, the water in some water storage cups has dried up, and the water in another part of the water storage cup is not fully used
Moreover, the existing storage and drainage plates usually only include the plate body part stamped by plastic, and the particles are easy to deposit in the water storage cup, further reducing the water storage capacity, and at the same time, it is easy to block the drainage channel
Method used
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Embodiment 1
[0030]In this example, the storage and drainage boards are laid flat along the slope of the roof. The side length of the regular hexagon of the storage and drainage plate structure is b=30mm, the lowest height of the drainage channel is h=20mm, and the height of the plate is H=30mm. The drainage channel of the storage and drainage plate is regarded as a cuboid tank with a cross section A=30mm×20mm, and the water flow is regarded as an open channel uniform flow. Wall roughness n1=0.012, non-woven geotextile roughness n2=0.02, its comprehensive roughness n_c=(X_1 n_1+X_2 n_2) / (X_1+X_2)=(b n_1+2h n_2) / ( b+2h)=0.0154, where X1 and X2 are the wetted perimeter lengths corresponding to the roughness n1 and n2 respectively. According to the flow velocity formula v=(A^(2 / 3)·i^(1 / 2)) / (n〖·X〗^(2 / 3)), the flow velocity is inversely proportional to the roughness, and the storage The drainage flow rate of the drainage board is about 22% slower than that of ordinary storage and drainage boa...
Embodiment 2
[0035] In this example, the drainage structure of the storage and drainage plate remains the same as in Example 1, and the other structures are basically the same, except that the height of the plate is increased to H=50mm, the width of the connecting groove on the slope is c1=20mm, the depth d1=40mm, and the connecting groove on the horizontal side Width c2=20mm, depth d2=30mm. Its drainage capacity is the same as Q_u=2.56l / s·m in Embodiment 1, and its water storage capacity is about V=21.4l / m2, which is greatly improved.
[0036] In this example, as Figure 6 As shown, there is a 500mm pebble isolation zone at the drainage outlet within the green area, and the isolation zone and the planting substrate are separated by a partition, and the height of the partition is 50mm higher than the top layer of the substrate. A check box is installed on the drain. The storage and drainage plate passes through the bottom of the partition to extend the drain, and the upper geotextile (6-...
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Abstract
The invention relates to a large storage amount water storing and draining plate suitable for roof greening. The large storage amount water storing and draining plate comprises a plastic plate face, honeycomb water storing bottles, communicating grooves, draining holes, supporting columns, non-woven geotextiles and water absorbing belts. The plate face, the water storing bottles, the communicating grooves and the supporting columns are all made of high density polyethylene (HDPE) plastic base plates after stamping. The water storing bottles are arranged on the plate face in a honeycomb mode and connected through the communicating grooves. The water storing space is large, and meanwhile uniform water distributing is achieved. The draining holes are formed in the plate face. The supporting columns are arranged below the plate face. One layer of the non-woven geotextiles is adhered on the plate face and the bottom of the each bottle correspondingly. The water absorbing belts are arranged in the position, of the communicating grooves, of the geotextiles of the plate face and stretch in the bottoms of the bottles in the position of the water storing bottles. The structure is reasonable, forming is convenient, construction is convenient, maintenance is simple, the mechanical property is good, universality is high, system adaptability is strong, and meanwhile the multiple functions of water storing, water draining, filtering, ventilating, heat insulation, noise reduction, root thorns resisting and the like are achieved; and stored rainwater can be utilized to replenish water for a matrix.
Description
technical field [0001] The invention belongs to the field of building greening engineering and relates to a roof greening storage and drainage board. Background technique [0002] With the rapid development of urbanization, impermeable materials cover a vast urban area, resulting in urban heat island effect and urban waterlogging, and the contradiction between green land and urban construction land is increasingly intensified. In order to maximize the accumulation, infiltration and purification of rainwater in urban areas, the state and local governments have successively issued opinions and methods for the construction of "sponge cities" that promote the utilization of rainwater resources and ecological environment protection. The roof greening will transform the impermeable surface that occupies a considerable proportion of the city into a green space. While retaining rainwater, slow drainage and slow release, it will also play a role in energy saving, emission reduction, ...
Claims
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Application Information
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