Breathable paving structure for improving growth environment of ancient trees

Abstract

The utility model relates to a breathable paving structure for improving the growing environment of an ancient tree, which comprises keels arranged around the trunk of the ancient tree, an overhead layer and plates, and the overhead layer comprises foundation columns arranged underground at intervals, embedded iron and supporting columns connecting the embedded iron and the keels. A blind ditch is formed in the position, at the downstream position of the site drainage slope, in the empty space, a U-shaped resin drainage groove is formed in the blind ditch, the U-shaped resin drainage groove is covered with a stainless steel rainwater grate, and the blind ditch is connected with a water collecting well or a municipal drainage system through a drainage pipeline. And the earth surface of the empty space area is provided with a drainage gradient which is inclined towards the blind ditch direction by 0.5-1%. According to the breathable pavement structure, through the design of the breathable pavement system for improving the growth environment of the ancient tree, the influence of hard ground pavement on root growth of the ancient tree is effectively relieved, the water permeability and the air permeability of soil are improved, the drainage system ensures that no water is accumulated around the ancient tree, and the risk of root rot is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to garden engineering technical field especially a kind of ventilation paving structure for improving the growth environment of ancient tree. BACKGROUND

[0002] With the acceleration of urbanization, more and more ancient trees are surrounded in hard paving environment, facing the problems of growth restriction, poor soil permeability, poor drainage and so on. The existing ancient tree protection measures, such as adding ventilation paving and expanding tree pool, although alleviate these problems to some extent, but have not completely solved the risk of root rot caused by waterlogging. At the same time, the traditional drainage system is often set above the ground, occupying space and affecting the landscape beauty. SUMMARY

[0003] The utility model aims at providing a kind of ventilation paving structure for improving the growth environment of ancient tree, especially the ground paving and drainage system designed for ancient tree protection, to solve the problems of growth restriction, soil hardening and waterlogging of ancient trees in the process of urbanization.

[0004] To achieve the above purpose, the utility model provides a kind of ventilation paving structure for improving the growth environment of ancient tree, including keel arranged around the trunk of ancient tree, overhead layer arranged on the lower side of keel, and board laid on the keel. The keel is made of square galvanized steel pipe with a spacing of 40-80 cm, and the center of the keel is a circle with a diameter of 100-200 cm. The overhead layer includes foundation column arranged under the ground, pre-buried iron partially pre-buried on the top of foundation column, and support column connecting pre-buried iron and keel. The foundation column is PVC pipe with C20 strength or above. The pre-buried iron includes four L-shaped pre-buried claws and a square top surface. The pre-buried claws are arranged inside the top of foundation column, and the square top surface is arranged outside the top of foundation column. The overhead layer is provided with a hidden ditch downstream of the site drainage slope. The hidden ditch is provided with a U-shaped resin drainage groove, and the U-shaped resin drainage groove is covered with a stainless steel rainwater grate. The hidden ditch is connected with a water collecting well or municipal drainage system through a drainage pipeline. The pipe opening of the drainage pipeline is provided with a stainless steel special-shaped grate. The ground surface of the overhead layer area is provided with a drainage slope inclined to the hidden ditch by 0.5%-1%.

[0005] Preferably, the height of the square galvanized steel pipe is 3-5 cm, the width is 5-8 cm, and the wall thickness is more than 0.2 cm.

[0006] Preferably, the width of the board is 10-20 cm, the thickness is 2-6 cm, and the adjacent boards are spaced apart by 0.3-0.5 cm.

[0007] Preferably, the PVC pipe has a height of 30-50 cm, a diameter of 15-30 cm, and a wall thickness of 2-4 mm.

[0008] Preferably, the support column is a square galvanized steel pipe with a side length of 5-8 cm, a wall thickness of 0.2-0.5 cm, and a length of 15-25 cm; one end of the support column is welded to the square top surface of the embedded iron, and the other end is welded to the keel.

[0009] Preferably, the drain channel has a width of 20-30 cm and a depth of 25-40 cm.

[0010] Preferably, the drain pipe is a PVC pipe with a diameter of 10-20 cm.

[0011] Preferably, the air-permeable pavement structure further comprises a modified soil layer filled in the vertical projection area of the ancient tree canopy.

[0012] Based on the above technical solution, the air-permeable pavement structure has the following advantages:

[0013] The air-permeable pavement structure of the present application effectively alleviates the influence of hard ground pavement on the growth of ancient tree roots, increases the water permeability and air permeability of the soil, ensures that there is no water accumulation around the ancient tree, and reduces the risk of root decay.

[0014] Improving the landscape aesthetics: the pavement is parallel to the ground, maintaining the flatness of the landscape. The drainage system is hidden under the pavement, which does not affect the landscape effect, provides a resting space for pedestrians, and prevents the soil around the ancient tree from being compacted due to pedestrian trampling.

[0015] Reducing maintenance costs: the use of optimal materials with excellent physical properties and environmental characteristics reduces the long-term maintenance costs of the pavement; the structure of the drain channel drainage system is simple and easy to clean and maintain.

[0016] Achieving the harmonious unity of ecology and humanity: the present application not only protects ancient trees, but also improves the overall aesthetics and functionality of the landscape, achieving the harmonious unity of ecology and humanity. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Fig. 1 is a schematic view of the cross section of the air-permeable pavement structure;

[0019] Fig. 2 is a schematic view of the cross section of the air-permeable pavement structure;

[0020] Fig. 3 This is a top view of a breathable paving structure. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] This utility model provides a breathable paving structure for improving the growing environment of ancient trees, such as... Figs. 1-3 As shown, a preferred embodiment of the present invention is illustrated.

[0023] Specifically, such as Fig. 1 , Fig. 2 As shown, the breathable paving structure includes keel 2 set around the trunk 1 of the ancient tree, an elevated layer set under the keel 2, and a board 13 laid on the keel 2. The keel 2 is made of square galvanized steel pipes spaced 40-80cm apart and arranged in an alternating pattern. The center of the keel 2 is a circle with a diameter of 100-200cm. The elevated layer includes foundation columns 3 set at intervals below the ground 15, pre-embedded iron 4 partially embedded in the top of the foundation columns 3, and support columns 6 connecting the pre-embedded iron 4 and the keel 2. The foundation columns 3 are PVC pipes poured with concrete of C20 strength or higher. The pre-embedded iron 4 is wrapped with... It consists of four L-shaped pre-embedded claws 5 and a square top surface. The pre-embedded claws 5 are located inside the top of the foundation column 3, and the square top surface is located outside the top of the foundation column 3. A culvert is provided in the elevated layer downstream of the site drainage slope. A U-shaped resin drainage channel 7 is provided in the culvert. The U-shaped resin drainage channel 7 is covered with a stainless steel rain grate 8. The culvert is connected to a collection well or municipal drainage system 11 through a drainage pipe 10. A stainless steel shaped grate 9 is provided at the pipe opening of the drainage pipe 10. The surface of the elevated layer area has a drainage slope of 0.5% to 1% towards the culvert 12.

[0024] Board 13 is made of lightweight, durable, corrosion-resistant, and weather-resistant materials. Examples include common solid wood boards, wood-plastic composite boards, and inorganic materials. Board 13 has a width of 10–20 cm and a thickness of 2–6 cm. Fig. 3 As shown, there are gaps of 0.3 to 0.5 cm between the boards 13.

[0025] Keel 2 uses square galvanized steel pipes as the keel material for the paving, ensuring a stable installation that does not collapse or tilt. The square galvanized steel pipes are 3-5cm high, 5-8cm wide, and have a wall thickness of 0.2cm or more. Keel 2 is spaced 40-80cm apart, arranged in a staggered pattern, with a circular tree pit (100-200cm in diameter) at the center, depending on the size of the ancient tree. The central keel is circular.

[0026] The overhead layer is composed of foundation column 3, embedded iron 4, and support column 6. The foundation column 3 is mainly composed of a PVC pipe, preferably, the height of the PVC pipe is 30-50 cm, the diameter is 15-30 cm, and the wall thickness is 2-4 mm. The PVC pipe is poured with C20 strength or above concrete. The embedded iron 4 is composed of four L-shaped embedded claws 5 and a square top surface with a side length of 8-10 cm, and is embedded at the top of the foundation column 3. The support column 6 is a square galvanized steel pipe with a height of 5-8 cm, a width of 5-8 cm, a wall thickness of 0.2-0.5 cm, and a length of 15-25 cm, and is welded at one end to the embedded iron 4 and at the other end to the keel 2. The foundation column 3 and the embedded iron 4 are below the ground surface 15, and the support column 6 is above the ground surface 15 to form an overhead layer. The ground surface in the overhead layer area is provided with a drainage slope inclined to the direction of the underground ditch 12 by 0.5%-1%, facilitating the natural flow of rainwater. The overhead layer provides a space for air communication and drainage for the ancient trees, ensuring the natural flow of air and water, promoting soil respiration and drainage.

[0027] As shown in Fig. 2 The underground ditch is arranged in the overhead layer below the board 13 and the keel 2, and the position of the underground ditch is arranged downstream of the site drainage slope according to the terrain, facilitating the collection of rainwater. The width of the underground ditch is 20-30 cm, and the depth is 25-40 cm, which can be adjusted according to actual needs. A U-shaped resin drainage groove 7 is arranged in the underground ditch, and the thickness of the U-shaped resin drainage groove 7 is 2 mm. The inner wall of the U-shaped resin drainage groove 7 is smooth, facilitating cleaning and maintenance. A stainless steel rainwater grate 8 is arranged on the U-shaped resin drainage groove 7 to prevent large particles from blocking. The underground ditch is connected to a water collecting well or a municipal drainage system 11 through a 10-20 cm diameter PVC drainage pipe 10, and a stainless steel special-shaped grate 9 is arranged at the pipe opening to prevent large particles from blocking the drainage opening and ensure that the accumulated water is quickly drained.

[0028] Further, the air-permeable pavement structure further comprises a modified soil layer filled in the vertical projection area of the ancient tree canopy. The soil improvement layer is filled with improved soil with good loose, air-permeable, and water-retaining properties, and a proper amount of organic fertilizer and microbial agent is added to the soil to improve soil fertility and microbial activity, thereby promoting the growth of ancient tree roots.

[0029] Specifically, the modified soil layer is a 20-30 cm thick layer of soil below the ground surface, which is improved by loosening the compacted soil by spade. After loosening the soil, improved materials with good loose, air-permeable, and water-retaining properties, such as grass charcoal soil, perlite, and vermiculite, are filled in the soil to improve the nutrient content of the soil and increase the water permeability and air permeability. In addition, a proper amount of organic fertilizer and microbial agent is added to improve soil fertility and microbial activity, thereby promoting the growth of ancient tree roots.

[0030] The breathable paving structure of the utility model effectively alleviates the influence of ground hard paving on the growth of the root system of the ancient tree, increases the water permeability and air permeability of the soil, ensures that there is no water accumulation around the ancient tree through the drainage system, and reduces the risk of root decay.

[0031] The paving is parallel to the ground, which maintains the flatness of the landscape.

[0032] The optimal material has excellent physical properties and environmental protection characteristics, which reduces the long-term maintenance cost of the paving.

[0033] The utility model not only protects the ancient tree, but also improves the overall aesthetic and functionality of the landscape, and realizes the harmonious unity of ecology and humanity.

[0034] Further, the construction of the breathable paving structure for improving the growth environment of the ancient tree can be carried out according to the following steps:

[0035] 1. Foundation column prefabrication: PVC pipe internal casting C20 concrete, placing embedded iron in the top center, starting water curing within 3-4 hours after final setting, which should be carried out according to local climate conditions and the type of cement used, and the duration is generally 21 to 28 days.

[0036] 2. After cleaning the site, arrange the ground surface to have a slope of 0.5% to 1%.

[0037] 3. Excavate the drainage ditch and place the U-shaped resin drainage groove, set the stainless steel grate on the U-shaped resin drainage groove to prevent large particles from blocking.

[0038] 4. Foundation column installation: interval keel layout support column point position, pay attention to avoid the root system of the ancient tree.

[0039] 5. Keel installation: cross keel according to the size of the ancient tree, the center is set to 100-200cm diameter circular tree pool, the keel is circular. Array keel to both sides, the interval is 40-80cm, the cross position coincides with the foundation column.

[0040] 6. Welding: weld the support column with the embedded iron, and weld the keel with the support column.

[0041] 7. Laying board: the laying board is 10-20cm wide, 2-6cm thick, and the length of both ends can cover the keel, and the gap between the boards is 0.3-0.5cm.

[0042] 8. Regularly maintain the soil by loosening and fertilizing, and maintain the good structure and fertility of the soil.

[0043] In order to further illustrate the technical scheme and effect of the present application, taking the reconstruction of the ancient tree platform in the Beijing Badachu Park as an example, the breathable paving structure based on the improvement of the growth environment of the ancient tree is used to reconstruct the original hard paving of the ancient tree. By laying the breathable paving structure, the water-permeable and air-permeable holes or gaps are reserved, and a certain space is left between the paving layer and the soil surface layer, which is used to maintain the water permeability and air permeability of the soil. The test results are as follows:

[0044] The test results before reconstruction are as follows:

[0045]

[0046]

[0047] The test results after reconstruction are as follows:

[0048]

[0049]

[0050] Through the comparison experiment and detection, it is found that the soil physical and chemical properties using the paving structure of the present application are better than those of the traditional closed paving, and more soil physical and chemical properties are controlled within the reference value, which proves the positive effect of the present application.

[0051] Finally, it should be pointed out that: the above examples are only used to illustrate the technical scheme of the present application, but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical scheme of the present application, they should be covered in the technical scheme range of the present application.

Claims

1. A breathable paving structure for improving the growth environment of ancient trees, characterized in that: The system includes a frame (2) surrounding the trunk (1) of the ancient tree, an overhead layer below the frame (2), and a board (13) laid on the frame (2). The frame (2) is made of square galvanized steel pipes spaced 40-80cm apart, with the center of the frame (2) being a circle with a diameter of 100-200cm. The overhead layer includes foundation columns (3) spaced below the ground (15), embedded iron (4) partially embedded in the top of the foundation columns (3), and support columns (6) connecting the embedded iron (4) and the frame (2). The foundation columns (3) are PVC pipes filled with concrete of C20 strength or higher. The embedded iron (4) includes... The structure consists of four L-shaped pre-embedded claws (5) and a square top surface. The pre-embedded claws (5) are located inside the top of the foundation column (3), and the square top surface is located outside the top of the foundation column (3). A culvert is provided in the elevated layer downstream of the site drainage slope. A U-shaped resin drainage trough (7) is provided in the culvert. A stainless steel rain grate (8) covers the U-shaped resin drainage trough (7). The culvert is connected to a collection well or municipal drainage system (11) through a drainage pipe (10). A stainless steel shaped grate (9) is provided at the pipe opening of the drainage pipe (10). The surface of the elevated layer area has a drainage slope of 0.5% to 1% towards the culvert (12).

2. The breathable paving structure according to claim 1, characterized in that: The square galvanized steel pipe has a height of 3-5cm, a width of 5-8cm, and a wall thickness of 0.2cm or more.

3. The breathable paving structure according to claim 1, characterized in that: The width of the board (13) is 10-20cm and the thickness is 2-6cm. There is a gap (14) of 0.3-0.5cm between adjacent boards (13).

4. The breathable paving structure according to claim 1, characterized in that: The PVC pipe has a height of 30-50cm, a diameter of 15-30cm, and a wall thickness of 2-4mm.

5. The breathable paving structure according to claim 1, characterized in that: The support column (6) is a square galvanized steel pipe with a side length of 5-8cm, a wall thickness of 0.2-0.5cm, and a length of 15-25cm. One end of the support column (6) is welded to the square top surface of the pre-embedded iron (4), and the other end is welded to the keel (2).

6. The breathable paving structure according to claim 1, characterized in that: The width of the underground trench is 20-30cm and the depth is 25-40cm.

7. The breathable paving structure according to claim 1, characterized in that: The drainage pipe (10) is a PVC pipe with a diameter of 10 to 20 cm.

8. The breathable paving structure according to claim 1, characterized in that: The breathable paving structure also includes an improved soil layer filled in the vertical projection area of ​​the ancient tree canopy.

Images