Planting roof suitable for locally planting arbor and construction method

Abstract

The planting roof comprises a structural layer, a waterproof layer, a filtering layer and a backfill soil layer which are sequentially laid from bottom to top, and the waterproof layer is provided with a root puncture resistant layer and a heavy metal ion adhesion layer for inhibiting growth of roots of the arbor; under the condition of mixed planting of shallow root system plants and part of arbor, the root system of the arbor can be effectively prevented from penetrating through the waterproof layer, the durability of the root-puncture-resistant waterproof roll is greatly improved, meanwhile, field laying and construction are easy, the construction process is simple, the root-puncture-resistant waterproof roll is suitable for treatment of complex nodes, and the service life of the root system is prolonged while the risk that the root system of the arbor penetrates through the waterproof layer is reduced. And the cost can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a planting roof suitable for local planting of trees and a construction method thereof. Background Art

[0002] The commonly used root-penetration-resistant waterproof membranes for existing roof planting are as follows: chemical root-blocking asphalt membrane, HDPE membrane, and copper foil composite membrane. For roofs where only shallow-rooted plants are planted, waterproof materials such as chemical root-blocking asphalt membrane and HDPE membrane are generally used. However, if a small number of trees are planted, the cost of using copper foil composite membrane is too high, the node processing is complicated, and the construction is difficult. The use of waterproof materials such as chemical root-blocking asphalt membrane and HDPE membrane has the risk of being penetrated by the roots of the trees, resulting in leakage.

[0003] Therefore, there is an urgent need to develop a green roof that can effectively prevent the roots of trees from penetrating the waterproof layer when shallow-rooted plants and some trees are mixed together, greatly improving the durability of the root-penetration-resistant waterproof membrane. At the same time, it is easy to lay and construct on site, has a simple construction process, and is suitable for the processing of complex nodes. While reducing the risk of tree roots penetrating the waterproof layer, it can effectively reduce costs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a planting roof and construction method suitable for local planting of trees. When shallow-rooted plants and some trees are mixedly planted, it can effectively prevent the roots of the trees from penetrating the waterproof layer, greatly improve the durability of the root-piercing waterproof membrane, and at the same time, it is easy to lay and construct on site, the construction process is simple, and it is suitable for the processing of complex nodes. While reducing the risk of the roots of the trees penetrating the waterproof layer, it can effectively reduce costs.

[0005] The planting roof suitable for local tree planting of the present invention comprises a structural layer, a waterproof layer, a filter layer and a backfill soil layer laid in sequence from bottom to top. The waterproof layer is provided with a root penetration resistance layer and a heavy metal ion attachment layer for inhibiting the growth of tree roots.

[0006] Furthermore, the heavy metal ion attachment layer is formed by soaking the flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer has adsorption capacity for the heavy metal ion solution.

[0007] Furthermore, the flexible skeleton layer is a non-woven fabric layer, the weight per square meter of the non-woven fabric layer is 180g / ㎡ to 220g / ㎡, the heavy metal ions are copper ions, and each kilogram of the non-woven fabric layer adsorbs 50 to 100mg of copper ions.

[0008] Furthermore, the material of the root penetration resistant layer is a modified asphalt waterproof membrane, and the heavy metal ion attachment layer is laid on the modified asphalt waterproof membrane.

[0009] Furthermore, a protective layer for protecting the heavy metal ion attachment layer is laid between the heavy metal ion attachment layer and the filter layer.

[0010] Furthermore, the filter layer includes graded gravel and geotextile laid on the graded gravel.

[0011] Furthermore, the weight of the geotextile per square meter is 120 g / ㎡ to 180 g / ㎡ and at least two layers are laid.

[0012] 8. A construction method for a planted roof suitable for localized tree planting according to any one of claims 1 to 7, characterized in that it comprises the following steps:

[0013] S1. Clean the structural layer;

[0014] S2. Laying a root-resistant puncture layer on the structural layer;

[0015] S3. Lay the heavy metal ion attachment layer on the root penetration resistance layer.

[0016] S4. Lay the drainage layer and backfill soil layer in sequence.

[0017] further:

[0018] In step S4, before laying the water filtration layer, a protective layer for protecting the heavy metal ion attachment layer is laid on the heavy metal ion attachment layer.

[0019] Furthermore, the heavy metal ion attachment layer is formed by soaking a flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer is a non-woven fabric layer, so that the heavy metal ion attachment layer is composed of a plurality of heavy metal ion attachment layer units;

[0020] In step S3, when the heavy metal ion attachment layer is laid on the root penetration resistance layer, adjacent heavy metal ion attachment layer units are overlapped with each other.

[0021] Beneficial effects of the present invention: The planting roof and construction method suitable for local planting of trees of the present invention can effectively prevent the roots of the trees from penetrating the waterproof layer when shallow-rooted plants and some trees are mixedly planted, greatly improving the durability of the root-piercing waterproof membrane. At the same time, it is easy to lay and construct on site, the construction process is simple, and it is suitable for the treatment of complex nodes. While reducing the risk of the roots of the trees penetrating the waterproof layer, it can effectively reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure numerals: 1. structural layer; 2. root penetration resistant layer; 3. heavy metal ion attachment layer; 4. protective layer; 5. graded gravel; 6. geotextile; 7. backfill soil layer. DETAILED DESCRIPTION

[0025] The technical solutions of this application will be described clearly and completely below, in conjunction with the accompanying drawings. It should be understood that the described embodiments represent only a portion of the embodiments of this application, and not all of them. The components of this application, generally described and illustrated in the drawings herein, may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but rather merely represents selected embodiments of this application. All other embodiments derived by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Figure 1 This is a structural schematic diagram of the present invention, as shown in the figure: the planting roof and construction method suitable for local planting of trees in this embodiment include a structural layer 1, a waterproof layer, a filter layer and a backfill soil layer 7 laid in sequence from bottom to top, the waterproof layer is provided with a root penetration resistant layer 2 and a heavy metal ion attachment layer 3 that inhibits the growth of tree roots; the structural layer refers to the lowest load-bearing part of the entire planting roof, usually a cast-in-place reinforced concrete slab or a steel structure floor slab, and its main function is to support various structural layers above (such as insulation layer, waterproof layer, backfill soil layer 7, etc.) and external loads such as plants, covering soil, rainfall and snow, to ensure the overall stability of the roof system; the root penetration resistant layer 2 is the core structural layer in the planting roof waterproof system, and its main function is to prevent plant roots from penetrating downward and destroying the waterproof layer, while also having waterproof performance. Its design must meet the dual needs of normal plant growth and building waterproof safety.

[0027] In this embodiment, the heavy metal ion attachment layer 3 is formed by soaking a flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer has an adsorption capacity for the heavy metal ion solution; the flexible skeleton layer is a non-woven fabric layer, and the weight per square meter of the non-woven fabric layer is 180g / ㎡~220g / ㎡, the heavy metal ions are copper ions, and each kilogram of the non-woven fabric layer adsorbs 50mg~100mg of copper ions; heavy metal ions have the property of hindering root tip growth, and applying copper ion preparations (copper sulfate, copper carbonate) or fluranon to the roots of seedlings can kill or inhibit the apical meristem of the roots, thereby achieving root apex pruning, but does not affect the growth of lateral roots; during the growth process of plants, the roots do not transport all of the heavy metals upward after absorbing them. Most of the heavy metals remain in the roots, mainly combining with the proteins in the roots to form stable chelates that remain in the roots, forming a "nodule" phenomenon, affecting the growth of the root apical meristem, resulting in a decrease in the production of auxin and other hormones, thereby inhibiting the growth of the root system.

[0028] In this embodiment, the root penetration-resistant layer 2 is made of a modified asphalt waterproofing membrane, and the heavy metal ion attachment layer 3 is applied on top of the modified asphalt waterproofing membrane. The modified asphalt waterproofing membrane specifically refers to a chemical root penetration-resistant modified asphalt waterproofing membrane for planted roofs. It is primarily composed of a long-fiber polyester fiber felt as the base, a modified asphalt coated with an imported chemical root inhibitor, a polyethylene film or mineral granules as the insulation material on the upper surface, and a polyethylene film as the insulation material on the lower surface. Chemical root inhibitors inhibit root nutrient absorption primarily due to cuticle, a surface component of the root system. Chemical root inhibitors promote the growth of the cuticle. The cuticle consists of an outermost waxy layer, an intermediate layer of wax and cuticle, and an innermost cuticle. The waxy layer is primarily composed of high-molecular-weight fatty acids and high-carbon monohydric alcohols. These compounds are permeable to substances the size of water molecules but have very low hydrophilicity. The growth of the cuticle limits the absorption and transportation of nutrients by this part of the root system, thereby inhibiting the root system from further damaging the waterproof layer.

[0029] In this embodiment, copper ions form stable chelates with functional groups such as hydroxyl groups and amino groups in the non-woven fabric fibers through coordination bonds. For example, the copper particles in the nano-copper oxide masterbatch are embedded in the polymer matrix through a mushroom-shaped microporous structure. This physical-chemical dual bonding method can resist dissociation under normal conditions. Therefore, under normal storage and use conditions, the copper ions in the non-woven fabric are stably present through the dual effects of chemical bonding and physical embedding, and evaporation will not occur, thereby preventing the loss of copper ions. Therefore, the heavy metal ion adhesion layer 3 formed by soaking the flexible skeleton layer (and non-woven fabric) in a heavy metal ion solution can be laid on the modified asphalt waterproof membrane after the flexible skeleton layer is dried, or the wet flexible skeleton layer can be directly laid on the modified asphalt waterproof membrane.

[0030] In this embodiment, a protective layer 4 for protecting the heavy metal ion attachment layer 3 is also laid between the heavy metal ion attachment layer 3 and the filter layer; the main function of the protective layer 4 is to prevent the flexible skeleton layer (and non-woven fabric layer) in the heavy metal ion attachment layer 3 from being damaged, and at the same time to prevent the loss of heavy metal ions; in the process of the roots of plants growing downward, the roots must first pass through the protective layer 4 before reaching the heavy metal ion attachment layer 3, and it is even more difficult to grow to the root penetration resistant layer 2, thereby avoiding damage to the modified asphalt waterproof membrane in the root penetration resistant layer 2.

[0031] In this embodiment, the filter layer includes graded gravel 5 and a geotextile 6 laid on the graded gravel 5; the graded gravel 5 has a thickness of 80 mm to 120 mm and a particle size of 15 Φ to 18 Φ; Φ refers to a particle size unit commonly used in particle size analysis.

[0032] In this embodiment, the weight of the geotextile 6 per square meter is 120 g / ㎡ to 180 g / ㎡ and at least two layers are laid.

[0033] The present invention also discloses a planting roof suitable for local planting of trees and a construction method thereof, which is characterized by comprising the following steps:

[0034] S1. Clean the structural layer 1; repair the damaged and defective parts of the surface of the structural layer 1 with cement mortar;

[0035] Additional layers should be made at details such as wall bases, equipment foundations, water outlets, pipe roots, and eaves corners. The additional scope should comply with the requirements of the design and roof engineering technical specifications;

[0036] Positioning and baseline;

[0037] S2. Laying a root-penetration-resistant layer 2 on the structural layer 1; the root-penetration-resistant layer 2 is a modified asphalt waterproofing membrane. The modified asphalt waterproofing membrane is laid on the structural layer 1, and the modified asphalt waterproofing membrane is rolled forward and pasted. The overlapped joints of the modified asphalt waterproofing membrane are heated and melted with a spray gun, and the modified asphalt waterproofing membrane is firmly bonded to the structural layer 1 while hot.

[0038] S3. The heavy metal ion attachment layer 3 is laid on the root puncture-resistant layer 2; after the heavy metal ion attachment layer 3 is laid, the heavy metal ion attachment layer 3 is organized for acceptance;

[0039] S4. Lay the drainage layer and backfill soil layer 7 in sequence.

[0040] In this embodiment, in step S4, before laying the water filter layer, a protective layer 4 for protecting the heavy metal ion attachment layer 3 is first laid on the heavy metal ion attachment layer 3; the material of the protective layer 4 is cement mortar with a thickness of 18 mm to 22 mm.

[0041] In this embodiment, the heavy metal ion attachment layer 3 is formed by soaking a flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer is a non-woven fabric layer, so that the heavy metal ion attachment layer 3 is composed of a plurality of heavy metal ion attachment layer units;

[0042] In step S3, during the process of laying the heavy metal ion attachment layer 3 on the root penetration resistant layer 2, adjacent heavy metal ion attachment layer units overlap each other; the flexible skeleton layer is a non-woven fabric layer, and the overlapping method of the non-woven fabric needs to be selected according to the application scenario and material properties, mainly including overlapping method, sewing method, welding method and gluing method. The specific selection can be made according to the actual construction conditions on site, and will not be repeated here.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A planted roof suitable for localized tree planting, characterized by: The invention comprises a structural layer, a waterproof layer, a filter layer and a backfill soil layer which are laid in sequence from bottom to top. The waterproof layer is provided with a root penetration-resistant layer and a heavy metal ion attachment layer for inhibiting the growth of tree roots.

2. The planted roof suitable for local tree planting according to claim 1, characterized in that: The heavy metal ion attachment layer is formed by soaking the flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer has an adsorption capacity for the heavy metal ion solution.

3. The planted roof suitable for local tree planting according to claim 2, characterized in that: The flexible skeleton layer is a non-woven fabric layer, the weight per square meter of the non-woven fabric layer is 180g / ㎡ to 220g / ㎡, the heavy metal ions are copper ions, and the copper ions adsorbed per kilogram of the non-woven fabric layer are 50 to 100mg.

4. The planted roof suitable for local tree planting according to claim 1, characterized in that: The material of the root penetration resistance layer is a modified asphalt waterproofing membrane, and the heavy metal ion attachment layer is laid on the modified asphalt waterproofing membrane.

5. The planted roof suitable for local tree planting according to claim 1, characterized in that: A protective layer for protecting the heavy metal ion attachment layer is also laid between the heavy metal ion attachment layer and the filter layer.

6. The planted roof suitable for local tree planting according to claim 1, characterized in that: The filter layer includes graded crushed stone (thickness and particle size of crushed stone) and geotextile laid on the graded crushed stone.

7. The planted roof suitable for local tree planting according to claim 6, characterized in that: The weight of geotextile per square meter is 120g / ㎡~180g / ㎡ and at least two layers are laid.

8. A construction method for a planted roof suitable for localized tree planting according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Clean the structural layer; S2. Laying a root-resistant puncture layer on the structural layer; S3. Lay the heavy metal ion attachment layer on the root penetration resistance layer. S4. Lay the drainage layer and backfill soil layer in sequence.

9. The construction method according to claim 8, characterized in that: In step S4, before laying the water filtration layer, a protective layer for protecting the heavy metal ion attachment layer is laid on the heavy metal ion attachment layer.

10. The construction method according to claim 8, characterized in that: The heavy metal ion attachment layer is formed by soaking a flexible skeleton layer in a heavy metal ion solution, and the flexible skeleton layer is a non-woven fabric layer, so that the heavy metal ion attachment layer is composed of a plurality of heavy metal ion attachment layer units; In step S3, when the heavy metal ion attachment layer is laid on the root penetration resistance layer, adjacent heavy metal ion attachment layer units are overlapped with each other.

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