JP2003265032A - Method for constructing lightweight greened rooftop - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for easily constructing a lightweight greened rooftop, making it possible to green the rooftop or the roof of a building so as to have lightweight structure, excellent maintainability, economical efficiency and durability against aging. <P>SOLUTION: The method for constructing the lightweight greened rooftop comprises the following process: laying drainage materials 20 on a concrete slab 10, laying a root-proof and water-permeable sheet 30 on the drainage materials 20, laying a water-retainable ceramic plate 40 on the root-proof and water-permeable sheet 30, spreading soil 50 on the water-retainable ceramic plate 40 in a thin layer, and planting dry-proof plants 60 or planting the stems and leaves of the plants by hand on the soil 50. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight rooftop greening method for greening a roof of a building or a house. [0002] With the recent urbanization, the heat island phenomenon has become a problem in cities. This is due to an increase in waste heat due to increased energy consumption, a decrease in water evaporation due to a decrease in green space, and an increase in night temperature due to the heat storage of concrete buildings. Recently, the problem of the heat island phenomenon has been promoted, and greening of buildings has been encouraged, various greening technologies have been developed, and greening efforts have been made. [0003] Recent greening technologies have made remarkable progress in lightening technologies compared to conventional rooftop greening technologies. For example, Japanese Patent Publication No. 2000-144749 discloses that a water-impervious or water-permeable sheet is attached to an artificial ground on a roof, a watering pipe is provided on the sheet, and artificial fibers are formed in fiber gaps of a base mat in which fibers are formed in a non-woven fabric. The soil is slid and filled, and the native plants are vegetated on a vegetation mat having a water retention and drainage function at the bottom as an integral unit, and the cultivation has a thickness of 30 to 60 mm and a weight of about 20 to 30 kg / m ² during precipitation. A vegetation mat having a plant that has already been planted is laid on a water-impervious or water-permeable sheet on which the irrigation pipe has been laid, and seedlings of native plants are planted on the vegetation mat to mix and plant. The technology of the rooftop greening construction method is disclosed. In the case of the conventional rooftop greening technique, as shown in FIG. 3, a soil thickness of about 100 mm is required on the rooftop of a building, for example, even on a lawn that can grow even if the soil thickness is small. In order to create a good environment for growing plants, it is necessary to lay a large amount of soil on the roof of the building so that a sufficient amount of water can be retained. In order to ensure the safety of buildings, the Building Standard Law restricts the load on buildings. In particular, the loading load in a house is set to 60 kg / m ^{2 for a} short-term load. The specific gravity of ordinary soil when wet is about 1.6, which is about 4 cm in soil thickness, and it is not possible to secure a water retention amount and soil thickness for satisfying good growth conditions of plants. [0005] In the proposal of the self-propelled rooftop greening construction method, the problem of the overload limit regulated by the rooftop greening has been cleared, but the cost for inspection and management of the irrigation pipes and irrigation facilities after construction has been increased. Insufficient drainage due to vegetation roots in the drainage layer due to aging, and poor drainage due to humus and clogging of the drainage layer cause poor plant growth due to long-term wetness due to poor drainage. . SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made in consideration of the problems described above.
An object of the present invention is to provide a lightweight rooftop greening method that makes a roof simple and lightweight, is excellent in maintainability and economy, and can withstand aging. Accordingly, a lightweight rooftop greening method according to the present invention is directed to a rooftop greening method including a roof, in which a drainage material is laid on an artificial ground on a rooftop, and a waterproof material is placed on the drainage material. Lay the root permeable sheet, have strength and durability on the root-proof permeable sheet, and have the function of water retention, water permeability and ventilation,
Laying innumerable water-retaining ceramic plates having countless fine gaps of about 100 μm in a nearly continuous form, laying a thin layer of soil on the water-retaining ceramic plates, and directly planting foliage-resistant plants or foliage on the soil. By sowing it by hand, it is simple, lightweight, economical and maintainable, and can withstand aging. With the above configuration, when greening the roof,
Laying drainage material, root-proof water-permeable sheet, water-retaining ceramic plate,
It is a simple construction method in which a thin layer of soil is laid and drought-resistant plants are directly planted or foliage is hand-sown, shortening the construction period and reducing the construction cost. [0009] Further, with the above-described structure, the drainage material is prevented from clogging due to invasion of soil and plant roots, and good drainage is maintained by the root-proof water-permeable sheet. FIG. 3 is a schematic view of the water-retaining ceramic plate having the above structure. This water retention ceramic plate has a diameter of 5-10.
It has an infinite number of fine gaps of about 0 μm in a nearly continuous form, retains about 30 to 37% of its volume of water, and continuously supplies water when the upper soil is dry, providing a good moisture condition for the soil. Keep. As a result, the soil thickness can be reduced and the weight can be reduced as compared with the conventional method. In addition, the fine pores are excellent not only in water retention but also in fertilizer retention, and are easy to inhabit soil microorganisms, and create a favorable soil environment for plants by the action of decomposing organic substances. In addition, installation of irrigation pipes, irrigation equipment, and the like become unnecessary, and initial costs and maintenance costs are reduced. [0011] Even in the case of an ultrathin soil having a soil thickness of about 5 to 10 mm, drought-resistant plants can grow with the amount of water retained in the fine pores of the water-retaining ceramics, and an ultralight rooftop greening is possible. Here, as the drought-resistant plant, tight sesame,
It refers to Sedum plants of the family Crassulaceae, such as marba mangansa, vine mangansa and onomangansa. Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the dimensions, shapes, materials, relative arrangements, and the like of the constituent members described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only. FIG. 1 is a view showing an embodiment of a lightweight rooftop greening method according to the present invention, and FIG. 2 is a schematic view of a fine gap between water-retaining ceramic plates in the lightweight rooftop greening method of FIG. The rooftop here includes not only a horizontal rooftop such as a building or a house, but also an inclined roof, etc., and broadly means the upper surface of a structure. As shown in FIG. 1, when greening a building roof by the lightweight rooftop greening method of the present invention, a drainage material 20 is laid on a concrete slab 10, and then a root-proof water-permeable material is placed on the drainage material 20. The sheet 30 is laid. Then, the water-retentive ceramic plate 40 is placed on the root-proof water-permeable sheet 30.
Lay. Then, 5
A soil 50 of about 10 mm to 10 mm is laid, and the drought-resistant plant 60 is directly planted or hand-sown in the soil 50. In the greening work on a building roof by the lightweight roof greening method of the present invention, there is an advantage that the construction period and the planting time can be adjusted not at the same time but at the same time. That is, the drainage material 20 is laid on the concrete slab 10,
0, and the construction of the water-retaining ceramic plate 40 is completed, so that the soil can be laid and the planting work can be carried out at a time when the plants can live and grow well. At the time of greening the rooftop of a building using the lightweight rooftop greening method of the present invention, as a drought-resistant plant to be planted, a plant belonging to the genus Sedum belonging to the family Crimsonaceae, such as tight sesame, malba mannengsa, vine mangansa, and onomannengusa, is used. Can be used. These plants have a well-developed water storage function and can grow even in extremely dry conditions. When the soil 50 is thinly formed, Sedum plants are particularly suitable. When the soil thickness is reduced, weeds are difficult to grow,
Very little management effort is required. [0016] In addition, when soil is used as topsoil at a construction site, germination of seeds contained in the topsoil leads to revival of native plant species, contributing to protection of ecosystems and incurring soil transportation costs. No environmental impact is required. When greening a building roof by the lightweight rooftop greening method of the present invention, there is almost no need for watering after the installation, but it is desirable to water it when the installation is completed. Since the present invention is configured as described above, it has the following effects. The lightweight rooftop greening method according to the present invention is a simple method of laying a drainage material, a root-proof water-permeable sheet and a water-retaining ceramic plate, laying a thin layer of soil, directly planting plants, or manually sowing foliage. It is a construction method, and can realize weight reduction, improvement of economy and maintenance, shortening of construction period, reduction of construction cost, and excellent durability over time. Further, since there is no need to install irrigation pipes, irrigation equipment, and the like, and the environmental load is small, the roof of a building or the like can be easily greened, which can contribute to alleviation of the heat island phenomenon. When the topsoil at the construction site is used, it is expected to lead to the revival of native plant species and contribute to the protection of ecosystems.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an embodiment of a lightweight rooftop greening method according to the present invention. FIG. 2 is a schematic view of a continuous fine gap of a water-retaining ceramic plate 40. FIG. 3 is a cross-sectional view of a conventional general method of rooftop greening. [Description of Signs] 10 Concrete slab 20 Drainage material 30 Root-proof water-permeable sheet 40 Water-retaining ceramic plate 50 Soil 60 Dry-tolerant plant 70 Continuous fine gap

Claims (1)

Claims 1. In a construction method for rooftop greening including a roof, a drainage material is laid on an artificial ground on a roof, a root-proof water-permeable sheet is laid on the drainage material, and the root-proof water-permeable sheet is provided. It has strength and durability on top, and has water retention, water permeability and ventilation functions,
Laying innumerable water-retaining ceramic plates having countless fine gaps of about 100 μm in a nearly continuous form, laying a thin layer of soil on the water-retaining ceramic plates, and directly planting foliage-resistant plants or foliage on the soil. A lightweight rooftop greening method characterized by simple and lightweight hand-sowing to improve economics and maintainability, and to withstand aging.