WO2020244177A1 - Roadside tree planting hole structure and construction method therefor - Google Patents

Abstract

A roadside tree planting hole structure, the planting hole structure comprising a planting soil ball (2) placed in a planting hole and wrapped in a water-permeable geotextile bag (1), an upper peripheral water storage layer (3) and a lower peripheral water storage layer (5) being filled between the outer surface of the planting soil ball and the inner surface of the planting hole, the upper and lower peripheral water storage layers respectively comprising a top (41) and bottom water storage layer (51), a water purification layer (6) being positioned on the upper end face of the top water storage layer, a permeable layer (7) being positioned on the upper end face of the water purification layer, a water-permeable brick layer (8) being positioned on the upper end face of the permeable layer, and the sides of the water-permeable brick layer and the permeable layer being provided with side stones (9). The present planting hole structure and construction method facilitate moisture infiltration and accumulation, forming a root system micro-reservoir; surface runoff during rainy season can be regulated, and a water replenishment function can be performed during dry season; the water accumulation structure can ensure ventilation of the root system of the roadside tree, such that the planting hole has the function of storing rainwater on rainy days and releasing accumulated water for the growth of the roadside tree on sunny days, reducing maintenance costs and achieving the objective of utilising urban rainwater resources. Also comprising a construction method for the roadside tree planting hole structure.

Description

Street tree planting hole structure and construction method thereof Technical field

The invention relates to the technical field of street tree planting holes, in particular to a street tree planting hole structure and a construction method thereof.

Background technique

Street trees are an important part of urban landscaping landscape, and the growth status of street trees plays an important role in the landscape effect of urban roads. Street trees are planted by manually or mechanically borrowing soil below the ground surface to form tree holes, and backfilling the original soil excavated before planting seedlings. This kind of tree hole has a single structure and poor air permeability of the root system. In areas with poor soil penetration, the tree hole is prone to lack of water; whether it is watering or natural rainfall, the top soil layer of the tree hole is easy to compact, which affects the infiltration of surface water. It is difficult for the deep soil to store water effectively during the rainy season and watering period. Therefore, it is impossible to rely on the water stored in the dry season and delayed watering to support the growth of street trees. The survival rate of street trees is related to whether the surrounding soil ball is breathable and permeable. . Traditional planting holes cannot meet the above requirements, leading to roadside trees that are prone to yellow leaves, falling off, slow growth, and death of trees in severe cases.

Summary of the invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a street tree planting hole structure and a construction method thereof, and solves the technical problem of effectively storing water through the planting hole structure and the aquifer structure and making the roots of the street tree effective.

The technical solutions adopted by the present invention to solve the above problems are:

One aspect of the present invention provides a street tree planting hole structure, in which a planting soil ball wrapped with a permeable geotextile bag is built in the planting hole, and an upper peripheral water storage layer is filled between the outer surface of the planting soil ball and the inner surface of the planting hole And the lower peripheral aquifer, the upper peripheral aquifer and the lower peripheral aquifer respectively include a top aquifer and a bottom aquifer, the water purification layer is located on the upper end of the top aquifer, and the permeation layer is located in the water purification layer The permeable brick layer is located on the upper end surface of the permeable layer, and side stones are arranged around the permeable brick layer and the permeable layer.

Further, the cross section of the planting hole is U-shaped.

Further, the upper peripheral water storage layer and the lower peripheral water storage layer are sponge water storage medium soil layers mixed with coarse sand, loam and coconut chaff, with a thickness of 100-200 mm.

Further, the water purification layer is composed of fly ash or water purification filter material, and has a thickness of 10-30 mm.

Further, the permeable layer is composed of a mixture of crushed stone and coarse sand, with a thickness of 50-70 mm, and a particle size of the crushed stone of 20-40 mm. The porosity of the crushed stone and the coarse sand is 35%-50%.

Further, the permeable brick layer is composed of brick bodies made of permeable concrete poured into each other assembled, and the permeable brick layer is provided with at least two permeable holes longitudinally and a semi-arc drainage channel in the transverse direction.

Another aspect of the present invention provides a construction method of a street tree planting hole structure, which includes the following steps:

S1. Excavate the planting hole and level the inner surface of the planting hole;

S2. Lay a bottom aquifer at the bottom of the planting hole;

S3. A planting ball wrapped with a permeable geotextile bag is placed in the planting hole, and the planting ball is located on the bottom aquifer;

S4. Fill an upper peripheral aquifer and a lower peripheral aquifer between the outer surface of the planting soil ball and the inner surface of the planting hole. The upper peripheral aquifer and the lower peripheral aquifer respectively include the top aquifer and The bottom aquifer;

S5. Lay a clean water layer on the upper end of the top aquifer;

S6. Lay a permeable layer on the upper end of the water purification layer;

S7. Lay a permeable brick layer on the upper end of the permeable layer;

S8. Side stones are arranged around the permeable brick layer and the permeable layer.

Further, in step S2, a water storage medium soil layer made of a mixture of coarse sand, loam and coconut chaff is laid on the bottom of the planting hole as the bottom water storage layer;

In step S4, between the outer surface of the planting soil ball and the inner surface of the planting hole is filled with a water storage medium soil layer made of a mixture of coarse sand, loam and coconut chaff as the upper peripheral water storage layer and the lower peripheral storage Water layer.

Further, in step S2, the bottom aquifer is disinfected with a 300-fold solution of carbendazim and then watered thoroughly.

Furthermore, step S3 includes:

S31. Place permeable geotextile bags on the bottom aquifer;

S32. Put the planting soil ball into the permeable geotextile bag, and backfill the planting soil into the permeable geotextile bag until the bag is full.

The beneficial effect of the present invention is that the street tree planting hole structure of the present invention includes a permeable brick layer, a permeable layer, a water purification layer, an upper peripheral water storage layer, a permeable geotextile, a planting soil ball, and a lower peripheral water storage layer in turn from top to bottom. . The permeable brick layer is assembled by permeable bricks and laid on the top of the street tree planting holes. Watering water or rainwater passes through the permeable brick layer and flows through the permeable layer composed of gravel and coarse sand to reach the water purification layer composed of fly ash or water purification filter material. After adsorption and purification, the water purification layer enters the upper peripheral aquifer and the lower peripheral aquifer to store water. The invention also discloses a construction method of the above-mentioned street tree planting hole structure. The street tree planting hole structure of the present invention can facilitate the infiltration of water and accumulate around the root system of the street tree to form a root micro-reservoir; it not only regulates the surface runoff during the rainy season, but also exerts the water replenishment function in the water shortage season by conserving water, and the planting soil ball has special periphery The water storage structure can also ensure the ventilation of the roots of the street trees, improve the survival rate of the street trees, make the street tree planting holes have the function of storing rainwater in rainy days, and releasing water for the growth of street trees on sunny days, reducing maintenance costs, and achieving the purpose of urban rainwater utilization.

Description of the drawings

Fig. 1 is a schematic structural diagram of the planting hole structure of the street tree in the present invention.

The figure includes: planting hole 1, permeable geotextile bag 2, planting soil ball 3, upper peripheral aquifer 4, lower peripheral aquifer 5, top aquifer 41, bottom aquifer 51, water purification layer 6, infiltration Layer 7, permeable brick layer 8, side stone 9.

Detailed ways

The following describes the implementation of the present invention in detail with reference to the accompanying drawings. The accompanying drawings are for reference and illustrative purposes only, and do not constitute a limitation on the scope of protection of the present invention.

As shown in FIG. 1, this embodiment provides a street tree planting hole structure on the one hand. A planting soil ball 3 wrapped with a permeable geotextile bag 2 is built in the planting hole 1. The outer surface of the planting soil ball 3 is connected to the planting hole 1. The upper peripheral aquifer 4 and the lower peripheral aquifer 5 are filled between the inner surface. The upper peripheral aquifer 4 and the lower peripheral aquifer 5 respectively include a top aquifer 41 and a bottom aquifer 51. Layer 6 is located on the upper end surface of the top water storage layer 41, the permeable layer 7 is located on the upper end surface of the water purification layer 6, the permeable brick layer 8 is located on the upper end surface of the permeable layer 7, and the permeable brick layer 8 and the permeable layer 7 are provided with Side stone 9.

In this embodiment, the cross section of the planting hole is U-shaped. Preferably, the street tree planting hole is 1.25-1.5 meters long, 1-1.25 meters wide, and 1-1.5 meters deep; the planting hole has a cube planting hole with a side length of 20-30 cm in the middle.

In this embodiment, the upper peripheral water storage layer and the lower peripheral water storage layer are sponge water storage medium soil layers mixed with coarse sand, loam and coconut chaff, with a thickness of 100-200mm, and the volume of the coarse sand The content accounts for 40%-50%, the volume content of loam soil accounts for 30%-40%, and the volume content of coconut bran accounts for 10%-30%.

In this embodiment, the water purification layer is composed of fly ash or a water purification filter material with similar properties and low price, with a thickness of 10-30 mm.

In this embodiment, the permeable layer is composed of a mixture of crushed stone and coarse sand, with a thickness of 50-70 mm, and a gravel particle size of 20-40 mm. The porosity of the crushed stone and coarse sand is 35%-50%. .

In this embodiment, the permeable brick layer is composed of brick bodies made of permeable concrete poured together, and at least 2-6 circular permeable holes are opened longitudinally in the permeable brick layer, and semi-arc drainage channels are opened laterally. Preferably, the water-permeable brick layer can select a color pattern according to the paving conditions around the planting hole.

In this embodiment, during watering and maintenance or raining seasons, ground water will enter through the permeable brick layer 8 to penetrate

Layer 7, the water purified by the water purification layer 6 will enter the upper peripheral aquifer 4 and the lower peripheral aquifer 5 for storage, and slowly release to support the growth of street trees. The special structure of the aquifer also has good air permeability , Promote the growth of street tree roots.

Another aspect of the embodiments of the present invention provides a construction method of a street tree planting hole structure, which includes the following steps:

S1. Excavate the planting hole and level the soil on the inner surface of the planting hole;

S2. Lay a bottom aquifer at the bottom of the planting hole;

S3. A planting ball wrapped with a permeable geotextile bag is placed in the planting hole, and the planting ball is located on the bottom aquifer;

S4. Fill an upper peripheral aquifer and a lower peripheral aquifer between the outer surface of the planting soil ball and the inner surface of the planting hole. The upper peripheral aquifer and the lower peripheral aquifer respectively include the top aquifer and The bottom aquifer;

S5. Lay a water purification layer on the upper end of the top aquifer, the thickness of the water purification layer is 10-30mm;

S6. Lay a permeable layer on the upper end of the water purification layer;

S7. Lay a permeable brick layer on the upper end of the permeable layer, and reserve stem through holes around the stems. Preferably, the stem through holes are round or square;

S8. Side stones are arranged around the permeable brick layer and the permeable layer. Preferably, the side stones and permeable brick layer are flush with the sidewalk ground to facilitate cleaning and pedestrian passage.

In this embodiment, in step S2, a mixture of coarse sand, loam and coconut chaff is laid on the bottom of the planting hole

The soil layer of the water storage medium is used as the bottom aquifer, and the loam can be mixed with nutrient soil, with a thickness of 150mm, and use carbendazim 300 times solution to disinfect the bottom aquifer and pour thoroughly;

In this embodiment, step S3 includes:

S31. Place a permeable geotextile bag on the bottom aquifer; preferably, the permeable geotextile bag is separated from the inner surface of the planting hole by 100-200mm;

S32. The planting soil ball is hung vertically into the permeable geotextile bag, the planting direction is adjusted, and the planting soil is backfilled into the permeable geotextile bag until the bag is filled, that is, the backfilled planting soil and the cross section of the permeable geotextile bag are flush and leveled.

In step S4, between the outer surface of the planting soil ball and the inner surface of the planting hole is filled with a water storage medium soil layer made of a mixture of coarse sand, loam and coconut chaff as the upper peripheral water storage layer and the lower peripheral storage Water layer. Preferably, the thickness of the upper peripheral water storage layer is 100 mm.

The street tree planting hole structure formed by the construction method provided by this embodiment includes permeable brick layer, permeable layer, water purification layer, upper peripheral water storage layer, permeable geotextile, planting soil ball, and lower peripheral water storage in order from top to bottom Floor. The permeable brick layer is assembled by permeable bricks and laid on the top of the street tree planting holes. Watering water or rainwater passes through the permeable brick layer and flows through the permeable layer composed of gravel and coarse sand to reach the water purification layer composed of fly ash or water purification filter material. After adsorption and purification, the water purification layer enters the upper peripheral aquifer and the lower peripheral aquifer to store water. The embodiment of the present invention can facilitate the infiltration of water and accumulate around the roots of the street trees to form a root micro-reservoir; the special water storage structure around the planting soil ball can also ensure the ventilation of the roots of the street trees, improve the survival rate of the street trees, and reduce maintenance costs.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, etc. made without departing from the spirit and principle of the present invention Simplified, all should be equivalent replacement methods, and they are all included in the protection scope of the present invention.

Claims (10)

A street tree planting hole structure, which is characterized in that: a planting soil ball wrapped with a permeable geotextile bag is built into the planting hole, and the outer surface of the planting soil ball and the inner surface of the planting hole are filled with an upper peripheral water storage layer and The lower peripheral aquifer. The upper peripheral aquifer and the lower peripheral aquifer respectively include a top aquifer and a bottom aquifer. The water purification layer is located on the upper end of the top aquifer, and the permeation layer is located at the end of the water purification layer. On the upper end surface, the permeable brick layer is located on the upper end surface of the permeable layer, and side stones are arranged around the permeable brick layer and the permeable layer. The street tree planting hole structure according to claim 1, wherein the cross section of the planting hole is U-shaped. The street tree planting hole structure according to claim 1, characterized in that: the upper peripheral aquifer and the lower peripheral aquifer are a sponge water storage medium soil layer mixed with coarse sand, loam, and coconut chaff. It is 100-200mm. The street tree planting hole structure according to claim 1, wherein the water purification layer is composed of fly ash or water purification filter material, and has a thickness of 10-30 mm. The street tree planting hole structure according to claim 1, wherein the permeable layer is composed of a mixture of gravel and coarse sand, with a thickness of 50-70 mm, and a gravel particle size of 20-40 mm. The porosity after mixing is 35%-50%. The street tree planting hole structure according to claim 1, wherein the permeable brick layer is composed of bricks made of permeable concrete poured into each other, and the permeable brick layer has at least two permeable holes in the longitudinal direction and half in the transverse direction. Curved drainage channel. A construction method of a street tree planting hole structure is characterized in that it comprises the following steps: S1. Excavate the planting hole and level the inner surface of the planting hole; S2. Lay a bottom aquifer at the bottom of the planting hole; S3. A planting ball wrapped with a permeable geotextile bag is placed in the planting hole, and the planting ball is located on the bottom aquifer; S4. Fill an upper peripheral aquifer and a lower peripheral aquifer between the outer surface of the planting soil ball and the inner surface of the planting hole. The upper peripheral aquifer and the lower peripheral aquifer respectively include the top aquifer and The bottom aquifer; S5. Lay a clean water layer on the upper end of the top aquifer; S6. Lay a permeable layer on the upper end of the water purification layer; S7. Lay a permeable brick layer on the upper end of the permeable layer; S8. Side stones are arranged around the permeable brick layer and the permeable layer. The construction method of the street tree planting hole structure according to claim 7, characterized in that: in step S2, a water storage medium soil layer made of a mixture of coarse sand, loam and coconut chaff is laid on the bottom of the planting hole as the bottom storage Water layer; In step S4, between the outer surface of the planting soil ball and the inner surface of the planting hole is filled with a water storage medium soil layer that is a mixture of coarse sand, loam and coir as the upper peripheral water storage layer and The lower peripheral aquifer. The construction method of the street tree planting hole structure according to claim 8, characterized in that: in step S2, the bottom aquifer is disinfected with a 300-fold solution of carbendazim and then watered thoroughly. The construction method of the street tree planting hole structure according to claim 7, characterized in that: step S3 comprises: S31. Place permeable geotextile bags on the bottom aquifer; S32. Put the planting soil ball into the permeable geotextile bag, and backfill the planting soil into the permeable geotextile bag until the bag is full.

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