A device for the rejuvenation of street trees, and a method of construction and use thereof

Abstract

The application provides a device for street tree rejuvenation. The device comprises a tree pool and a rejuvenation pit, and a graded sand water channel is arranged from the tree pool to the rejuvenation pit; one end of the graded sand water channel is led out from the inside of the upper part of a corner of the tree pool, and the other end of the graded sand water channel is led into the rejuvenation pit, so that water can directly flow from the tree pool into the rejuvenation pit during irrigation; the graded sand water channel is led out from the upper part of the tree pool, the top end is exposed to the soil in the tree pool, and the one end of the graded sand water channel in the rejuvenation pit. The application has the characteristics that the growth of street trees can be promoted, the situation that the growth of trees is weakened due to deep water shortage of street trees is solved, and the periodic observation of the rejuvenation effect is carried out.

Description

[0001] This invention is a divisional application of application number CN201611240084.1, filed on December 28, 2016, of the invention type, entitled "A Deep Watering and Rejuvenation Device for Roadside Trees, Construction Method and Application". Technical Field

[0002] This invention relates to the field of landscape tree rejuvenation technology, and in particular to a device, construction method and application for the rejuvenation of street trees. Background Technology

[0003] Street trees are trees planted along roadsides and medians to provide shade for vehicles and pedestrians and to contribute to the streetscape. Most street trees are planted in square tree pits, 1m deep and 1.0-1.2m wide, surrounded by a load-bearing subgrade made of rammed earth (3:7 ratio of lime to soil). Due to root growth and pedestrian traffic, the soil in the tree pits is dense, making water infiltration difficult. Simultaneously, the 3:7 lime-soil subgrade also hinders root growth, confining it to the narrow space within the pit. This unique habitat results in severely impaired growth for street trees. The problem of deep watering and restricted root growth for street trees is not unique to China; it is a pressing issue worldwide, particularly prominent in large cities. Currently, domestic and international landscape architects have tried various methods to address these problems, such as increasing the size of the tree pits, constructing interconnected pits, replacing the 3:7 lime-soil subgrade with a graded gravel subgrade, and even drilling permeable drainage and aeration holes within the pits and installing root irrigation devices. However, due to limitations imposed by terrain conditions, road safety, and the difficulty of reconstruction, these methods often do not achieve the desired results.

[0004] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a deep water replenishment and rejuvenation device for roadside trees, a construction method and application. It is a deep water replenishment and rejuvenation technology for roadside trees, and together with related rejuvenation effect observation methods, it achieves the purpose of promoting the healthy growth of roadside trees, solves the current situation of tree growth weakness caused by deep water shortage in roadside trees, and allows for regular observation of rejuvenation effect.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A deep water replenishment and rejuvenation device for roadside trees is located within the subbase of a municipal sidewalk, which also contains tree pits. The deep water replenishment and rejuvenation device for roadside trees includes rejuvenation pits and multiple graded sand and gravel water channels.

[0008] The rejuvenation pit is filled with a rejuvenation matrix layer, which is divided into a graded sand and gravel layer and an artificial mixed matrix layer from top to bottom; the artificial mixed matrix layer is a mixture of organic matter and soil.

[0009] One end of each graded sand and gravel water channel is connected to the graded sand and gravel layer of the rejuvenation pit, and the other end of the graded sand and gravel water channel is connected to the upper interior of the tree pit.

[0010] It also includes an observation facility, which includes a microroot canal. The bottom end of the microroot canal passes through a graded gravel layer and an artificially mixed matrix layer in sequence and is located below the artificially mixed matrix layer. The top end of the microroot canal is located above the graded gravel layer.

[0011] The beneficial effects of this invention are:

[0012] The device described in this invention has the advantages of promoting deep water replenishment for roadside trees, promoting their healthy growth, solving the problem of weakened tree growth caused by deep water shortage, and allowing for regular observation of the rejuvenation effect.

[0013] The main function of the graded sand and gravel layer is to promote rapid water infiltration; the main function of the artificially mixed substrate layer is to provide nutrients to the roots, retain moisture, and promote the downward growth of the roots.

[0014] When trees in tree pits lack water, they absorb and utilize the water stored in the pits and surrounding soil by extending their roots deep into the pits, thus providing moisture to the trees and promoting their growth, achieving deep water replenishment for street trees. Using graded gravel water channels has advantages such as promoting rapid water infiltration and facilitating gas exchange between deep soil and the outside environment, providing sufficient water and oxygen for the root growth of street trees.

[0015] Microroot tubes can be used to insert root scanners into the ground to scan and measure the roots in the soil up to 2 meters deep around the microroot tubes and in the rejuvenation matrix layer. This allows for regular observation of the rejuvenation effect and quantitative understanding of the root growth and distribution depth of street trees.

[0016] Based on the above technical solution, the present invention can be further improved as follows.

[0017] Furthermore, the width of the rejuvenation pit should be the same as the width of the tree pit, the length of the rejuvenation pit should be no less than 1 meter, and the depth of the rejuvenation pit should be 1.2-1.5 meters, with 1.3 meters being the optimal depth.

[0018] The beneficial effects of adopting the above scheme are as follows: Appropriate specifications for the rejuvenation pit facilitate the achievement of the rejuvenation effect; a pit that is too small is not conducive to practical operation and will not achieve the desired rejuvenation effect, while a pit that is too large may affect road safety. Regarding the depth of the rejuvenation pit, a pit that is too shallow will not achieve the goal of introducing water into the deeper soil, while a pit that is too deep will exceed the distribution range of the tree root system, failing to achieve the rejuvenation effect and hindering on-site construction.

[0019] Furthermore, in the artificially mixed matrix layer, the volume ratio of organic matter to soil is between 4:6 and 6:4, with 5:5 being preferable.

[0020] The beneficial effects of adopting the above scheme are: it helps to further provide nutrients to the root system, has a high water retention capacity, and promotes the downward growth of the root system.

[0021] Furthermore, the thickness of the rejuvenating matrix layer is 90-120cm, and even further, the thickness of the rejuvenating matrix layer is 100cm, and the thickness ratio of the graded sand and gravel layer to the artificially mixed matrix layer is between 7:3 and 1:1; the distance between the upper surface of the rejuvenating matrix layer and the upper surface of the municipal sidewalk subbase is equal to 30cm.

[0022] The beneficial effects of adopting the above scheme are:

[0023] Appropriate thicknesses of the rejuvenating matrix layer, the graded sand and gravel layer, and the artificially mixed matrix layer facilitate rapid water infiltration and storage, while ensuring that the rejuvenating matrix layer has a certain load-bearing capacity and the safety of the municipal sidewalk pavement subbase.

[0024] A suitable distance between the upper surface of the rejuvenating matrix layer and the upper surface of the municipal sidewalk subbase is beneficial for the laying of the municipal sidewalk subbase and ensures its safety.

[0025] Furthermore, the top of the micro-root canal is 10cm below the upper surface of the municipal sidewalk subgrade, and the bottom of the micro-root canal is located 2.1m below the upper surface of the municipal sidewalk subgrade.

[0026] The beneficial effects of adopting the above scheme are: the above settings facilitate the installation of observation port protection wells and protect the micro-root canals, ensuring the safety of the micro-root canals.

[0027] Furthermore, it also includes an observation port protection well, with the tip of the micro-root canal located inside the observation port protection well, and the wellhead of the observation port protection well is equipped with a well cover that can be opened or closed with a special key.

[0028] The beneficial effects of adopting the above scheme are: the function of this part is to protect the observation facilities from being damaged by pedestrians, while allowing researchers to open them periodically to carry out data collection.

[0029] Furthermore, the graded sand and gravel water channel is a non-woven bag filled with graded sand and gravel.

[0030] The beneficial effects of adopting the above scheme are: when artificially irrigating street trees, it is beneficial for water to flow quickly from the tree pit into the rejuvenation pit, and promotes the infiltration of water into the deeper soil without increasing the frequency of irrigation for street trees.

[0031] Furthermore, the tree pools are provided in multiple locations, and the rejuvenation pits are provided in multiple locations, with the rejuvenation pits located between any two adjacent tree pools.

[0032] The present invention also provides a method for constructing the above-mentioned deep water replenishment and rejuvenation device for roadside trees, characterized by comprising the following steps:

[0033] 1) Dig rejuvenation pits within the subbase of municipal sidewalks to keep the root cross-sections of trees flat;

[0034] 2) Dig a water passage between the tree pit and the rejuvenation pit, and at the same time set up a graded sand and gravel water channel; one end of the graded sand and gravel water channel is connected to the rejuvenation matrix layer, and the other end of the graded sand and gravel water channel is connected to the interior of the tree pit.

[0035] 3) Insert the micro-root canal into the bottom of the rejuvenation pit;

[0036] 4) Fill the rejuvenation pit with artificial mixed matrix to form an artificial mixed matrix layer, and then fill the artificial mixed matrix layer with graded sand and gravel to form a graded sand and gravel layer; the bottom of the micro root canal is located below the artificial mixed matrix layer, and the top of the micro root canal is located above the graded sand and gravel layer.

[0037] The beneficial effects of adopting the above solution are: the construction method of the deep water replenishment and rejuvenation device for roadside trees provided by the present invention is a deep water replenishment and rejuvenation technology for roadside trees. It can be combined with relevant rejuvenation effect observation methods to achieve the purpose of promoting the healthy growth of roadside trees, solve the current situation of tree growth weakness caused by deep water shortage in roadside trees, and conduct regular observation of rejuvenation effect.

[0038] Furthermore, the method includes the following steps: before step 4), spraying methyl thiophanate solution and rooting powder solution onto the root section of the tree.

[0039] The beneficial effect of adopting the above scheme is that it facilitates the later recovery of the root system.

[0040] This invention also provides an application of the aforementioned deep water replenishment and rejuvenation device for roadside trees in the evaluation of rejuvenation effects. The deep water replenishment and rejuvenation device for roadside trees described in this invention can be used in conjunction with relevant rejuvenation effect observation methods to promote the healthy growth of roadside trees, solve the problem of weakened tree growth caused by deep water shortage, and conduct regular observations of the rejuvenation effect. Attached Figure Description

[0041] Figure 1 This is a top view of the deep water replenishment and rejuvenation device for roadside trees described in this invention;

[0042] Figure 2 This is a cross-sectional view of the deep water replenishment and rejuvenation device for roadside trees described in this invention.

[0043] List of reference numerals

[0044] 1. Municipal sidewalk subbase, 2. Tree pit, 3. Rejuvenation pit, 31. Graded sand and gravel layer, 32. Artificial mixed matrix layer, 4. Graded sand and gravel water channel, 5. Micro root canal, 6. Observation port protection well. Detailed Implementation

[0045] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0046] like Figure 1 and Figure 2 As shown, a deep watering and rejuvenation device for roadside trees is located within a municipal sidewalk subbase 1, which also contains tree pits 2. The device includes rejuvenation pits 3 and multiple graded gravel water channels 4. The rejuvenation pits 3 are filled with a rejuvenation matrix layer, which is divided from top to bottom into a graded gravel layer 31 and an artificial mixed matrix layer 32. The artificial mixed matrix layer 32 is a mixture of organic matter and soil. One end of each graded gravel water channel 4 is connected to the graded gravel layer of the rejuvenation pit 3, and the other end is connected to the upper interior of the tree pit 2. The device also includes observation facilities, including micro-root cannulas 5. The bottom end of the micro-root cannulas 5 passes through the graded gravel layer 31 and the artificial mixed matrix layer 32 sequentially and is located below the artificial mixed matrix layer 32. The top end of the micro-root cannulas 5 is located above the graded gravel layer 31.

[0047] The width of the rejuvenation pit 3 is the same as the width of the tree pit 2. The length of the rejuvenation pit 3 is not less than 1 meter, and the depth of the rejuvenation pit is 1.2-1.5 meters. The effect is best when the depth of the rejuvenation pit 3 is 1.3 meters.

[0048] In the artificially mixed matrix layer 32, the volume ratio of organic matter to soil is 4:6-6:4, with 5:5 being preferable.

[0049] The thickness of the revitalizing matrix layer is 90-120cm, preferably 100cm. The thickness ratio of the graded sand and gravel layer 31 to the artificially mixed matrix layer 32 is between 7:3 and 1:1; for example, the thickness of the graded sand and gravel layer is 50-70cm, preferably not less than 60cm, and the thickness of the artificially mixed matrix layer is 30-60cm, preferably not exceeding 50cm. The distance between the upper surface of the revitalizing matrix layer and the upper surface of the municipal sidewalk subbase is 30cm, where 30cm is the thickness of the municipal subbase.

[0050] The top of the micro-root canal 5 is 10cm below the upper surface of the municipal sidewalk subgrade 1, and the bottom of the micro-root canal 5 is located 2.1m below the upper surface of the municipal sidewalk subgrade 1.

[0051] It also includes an observation port protection well 6. The tip of the micro-root cannula 5 is located inside the observation port protection well 6. The well opening of the observation port protection well 6 is equipped with a well cover, which is equipped with a special lock and a key that matches the special lock. The special key is used to open or close the well cover. The special key means that only staff members can use the key to open the lock of this well cover to prevent accidental operation by others.

[0052] The graded sand and gravel water channel 4 is a non-woven bag filled with sand and gravel.

[0053] The tree pool 2 is provided in multiple locations, and the rejuvenation pit 3 is provided in multiple locations, with the rejuvenation pit 3 located between any two adjacent tree pools 2.

[0054] The construction method of the above-mentioned deep water replenishment and rejuvenation device for roadside trees includes the following steps:

[0055] 1) Dig a rejuvenation pit 3 between the two tree pits 2, keeping the root cross-section of the tree flat;

[0056] 2) Dig a water passage between tree pit 2 and rejuvenation pit 3, and set up graded sand and gravel water channel 4 at the same time; one end of graded sand and gravel water channel 4 is connected to the rejuvenation matrix layer, and the other end of graded sand and gravel water channel 4 is connected to the interior of tree pit 2.

[0057] 3) Insert the micro-root canal 5 through the bottom of the rejuvenation pit 3;

[0058] 4) Fill the rejuvenation pit 3 with artificial mixed matrix to form artificial mixed matrix layer 32, and then fill the artificial mixed matrix layer 32 with graded sand and gravel to form graded sand and gravel layer 31; the bottom of the micro root canal 5 is located below the artificial mixed matrix layer 32, and the top of the micro root canal 5 is located above the graded sand and gravel layer 31.

[0059] Furthermore, before step 4), a solution of methyl thiophanate and a solution containing rooting powder are sprayed onto the root section.

[0060] The present invention also provides an application of the above-mentioned deep watering and rejuvenation device for roadside trees in the evaluation of rejuvenation effect.

[0061] The technical solution of the present invention will be described below through one specific embodiment.

[0062] Example

[0063] like Figure 1 and Figure 2 As shown, a deep watering and rejuvenation device for street trees is located within the municipal sidewalk subbase 1, which also contains tree pits 2. The device includes rejuvenation pits 3 and multiple graded sand and gravel water channels 4. The rejuvenation pits 3 are filled with a rejuvenation matrix layer. Each part will be described in detail below.

[0064] The width of rejuvenation pit 3 is the same as the width of the tree pit, the length of rejuvenation pit 3 is not less than 1 meter, and the depth of rejuvenation pit 3 is 1.3 meters. The main function of rejuvenation pit 3 is to fill in the rejuvenation substrate and connect to the water channel.

[0065] The rejuvenation pit 3 is filled with a rejuvenation matrix layer, which has a total thickness of 100cm and is divided into two parts: an upper part consisting of a 50-70cm thick layer of graded sand and gravel 31, primarily for promoting rapid water infiltration; and a lower part consisting of a 30-50cm thick artificial mixed matrix layer 32, composed of organic matter and soil, primarily for providing nutrients to the roots, retaining moisture, and promoting downward root growth. The thickness ratio of the graded sand and gravel layer 31 to the artificial mixed matrix layer 32 is between 7:3 and 1:1. In the artificial mixed matrix layer 32, the volume ratio of organic matter to soil can be 4:6 to 6:4, with 5:5 being preferable.

[0066] A graded gravel water channel 4 is installed from tree pit 2 to rejuvenation pit 3. The graded gravel water channel 4 consists of non-woven fabric bags and graded gravel, with the gravel contained within the non-woven fabric bags. One end of the channel has a circular, rigid, open water inlet, leading from the upper part of one corner of tree pit 2. This allows water to flow directly from the tree pit into the rejuvenation pit during irrigation. The other end of the channel leads into rejuvenation pit 3 and connects with the graded gravel layer. The channel must extend from the upper part of tree pit 2, with its top exposed above the soil in the pit. The channel must be located at one end within rejuvenation pit 3, and its upper surface must be 30cm below the municipal sidewalk subgrade, with a possible depth of 40-50cm. This is to ensure that the water channel is located within the graded sand and gravel layer, so that water can quickly flow into the rejuvenation pit. At the same time, the pit is dug to a depth of 40-50cm. This is to increase the height difference between the two ends, promote water infiltration, and prevent cold air from entering the rejuvenation pit in winter and freezing the root system.

[0067] Multiple graded sand and gravel water channels 4 can be installed, for example... Figure 1The example shows a rejuvenation pit 3 equipped with four graded sand and gravel water channels 4, two of which are introduced from the left tree pit and the other two are introduced from the right tree pit. Of course, other numbers of graded sand and gravel water channels 4 can be set according to specific circumstances.

[0068] The main function of the above-mentioned section is to introduce irrigation water from the tree pit into the rejuvenation pit 3. The pit is dug to a depth of 40-50cm below the upper surface of the municipal sidewalk subgrade (i.e., the ground surface), mainly to prevent tree roots from freezing in the cold winter season in the north.

[0069] The deep watering and rejuvenation device for roadside trees described in this invention can also be equipped with observation facilities. The observation facilities include micro-root tubes 5, the bottom end of which passes sequentially through a graded gravel layer 31 and an artificial mixed substrate layer 32 and is located below the artificial mixed substrate layer 32, while the top end of the micro-root tube 5 is located above the graded gravel layer 31. Specifically, a 2m long micro-root tube 5 is buried in the center of the rejuvenation pit 3. The top end of the micro-root tube 5 is 10cm below the ground surface. The micro-root tube 5 is divided into three parts from bottom to top: the lower part (80cm long), the middle part (100cm long), and the upper part (20cm long). The lower part of the micro-root tube is buried in the soil below the rejuvenation pit 3; the middle part is buried within the rejuvenation substrate (divided from bottom to top into an artificial mixed substrate cushion layer and a graded gravel layer); and the upper part is located within the roadbed layer. The lowest point of microroot canal 5 is located 2.1m below the upper surface of the municipal sidewalk subgrade 1. The main function of this section is to use instruments to periodically observe the root growth status.

[0070] Based on the above-mentioned device, a protective well 6 for the observation port can also be installed. A protective well 6 for the observation port is constructed at the location where the micro-root canal 5 is embedded, and a cast iron well cover with a diameter of 30cm is installed at the opening of the protective well 6. The well cover can be opened with a special key. The purpose of this part is to protect the observation facility from damage by pedestrians, while allowing researchers to open it periodically for data collection.

[0071] The deep water replenishment and rejuvenation device for roadside trees described in this invention can be installed between the tree pits of adjacent roadside trees, such as... Figure 1 As shown, the trees can be arranged in a pattern of one tree pool, one deep water replenishment and rejuvenation device for roadside trees, and so on. This ensures that one deep water replenishment and rejuvenation device for roadside trees can provide water replenishment, rejuvenation, and monitoring functions for the roadside trees on both sides.

[0072] The construction method of the above-mentioned deep water replenishment and rejuvenation device for roadside trees includes the following steps:

[0073] 1. Dig a rejuvenation pit 3 between the two trees. The width of the rejuvenation pit 3 should be the same as that of the tree pit 2, the length of the rejuvenation pit 3 should be no less than 1 meter, and the depth of the rejuvenation pit 3 should be 1.3 meters. During the excavation process, be sure to keep the root cut surface flat to prevent the roots from being crushed or damaged when breaking the soil with blunt tools such as shovels or picks (roots with clean cut surfaces are easier to recover, while crushed or damaged roots are difficult to recover and are prone to rotting later, leading to the weakening of the entire tree).

[0074] 2. Excavate a water passage from tree pit 2 to rejuvenation pit 3, and simultaneously construct a graded gravel water channel 4. The graded gravel water channel 4 consists of non-woven fabric bags filled with graded gravel. One end of the graded gravel water channel 4 has a circular, rigid, open water inlet, leading out from a corner of tree pit 2. The other end of the graded gravel water channel 4 leads into the graded gravel layer within rejuvenation pit 3. The upper surface of the graded gravel water channel at one end within the rejuvenation pit must be 30cm below the municipal sidewalk subgrade, and can be appropriately deepened to 40-50cm.

[0075] 3. At the bottom of rejuvenation pit 3, dig to a depth of 2.1m and vertically bury the bottom end of the root observation facility (micro-root canal 5). Backfill the outside of the micro-root canal 5 with the original soil to a depth of 1.3m.

[0076] 4. Fill the rejuvenation pit 3 with rejuvenation substrate to form a rejuvenation substrate layer. The rejuvenation substrate layer consists of a graded sand and gravel layer 31 and an artificial mixed substrate layer 32. The graded sand and gravel layer 31 is located at the top of the rejuvenation substrate layer, and the artificial mixed substrate layer 32 is located at the bottom. First, fill in a 30-50cm thick layer of artificial mixed substrate to form the artificial mixed substrate layer 32, and then fill in a 50-70cm thick layer of graded sand and gravel layer 31. During the filling process, compact each layer every 20cm to prevent collapse later. Before filling the substrate, be sure to spray the root cut surface with methyl thiophanate solution and a solution containing rooting powder to facilitate the later recovery of the root system.

[0077] 5. The top of the rejuvenation substrate is buried to 30cm underground, leaving a 30cm municipal sidewalk subbase. Within this 30cm, protective wells are built around the micro-root canals and covered with well covers, while leveling with the road surface.

[0078] The deep watering and rejuvenation device for roadside trees and its construction method described in this invention represent a technology for deep watering and rejuvenation of roadside trees, as well as a method for evaluating the rejuvenation effect. This technology can achieve deep watering of roadside trees without changing the existing irrigation management model, promoting root growth to deeper depths and improving the health of roadside trees. Simultaneously, a root scanner can be used to observe the root growth status of trees at a depth of up to 2 meters, allowing for a quantitative evaluation of the watering and rejuvenation effect on roadside trees.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for rejuvenating roadside trees, characterized in that, The device includes tree pools (2) and rejuvenation pits (3). The rejuvenation pits (3) are located between any two adjacent tree pools (2). A graded sand and gravel water channel (4) is provided from the tree pools (2) to the rejuvenation pits (3). The graded sand and gravel water channel (4) is a non-woven bag filled with graded sand and gravel. One end of the graded gravel water channel (4) is provided with a circular, hard, open water inlet, leading out from the upper part of a corner of the tree pit (2). The other end of the graded gravel water channel (4) is introduced into the rejuvenation pit (3) and communicates with the graded gravel layer (31) of the rejuvenation pit (3), so that water can flow directly from the tree pit (2) into the rejuvenation pit (3) during irrigation. The graded gravel water channel (4) leads out from the upper part of the tree pit (2), with its top exposed above the soil in the tree pit (2), and the graded gravel water channel (4) is located at one end in the rejuvenation pit (3). The upper surface of the graded gravel water channel (4) is located below the 30cm municipal sidewalk subbase (1). Dig to a depth of 40-50cm to increase the height difference between the two ends, promote water infiltration, and prevent cold air from entering the rejuvenation pit in winter and freezing the root system. The rejuvenation pit (3) is filled with a rejuvenation matrix layer, which is divided into a graded sand and gravel layer (31) and an artificial mixed matrix layer (32) from top to bottom. The material of the artificial mixed matrix layer (32) is a mixture of organic matter and soil. The thickness ratio of the graded sand and gravel layer (31) to the artificial mixed matrix layer (32) is between 7:3 and 1:

1. The width of the rejuvenation pit (3) is the same as the width of the tree pit (2), the length of the rejuvenation pit (3) is not less than 1 meter, and the depth of the rejuvenation pit (3) is 1.2-1.5 meters; The device includes an observation facility, wherein the observation facility includes a microroot canal (5), the bottom end of which passes through a graded gravel layer (31) and an artificial mixed matrix layer (32) in sequence and is located below the artificial mixed matrix layer (32), and the top end of the microroot canal (5) is located above the graded gravel layer (31).

2. The device for rejuvenating roadside trees according to claim 1, characterized in that, The device is located within the municipal sidewalk subbase (1).

3. The device for rejuvenating roadside trees according to claim 1, characterized in that, The tree pool (2) is provided in multiple locations, and the rejuvenation pit (3) is provided in multiple locations.

4. A method for constructing a device for rejuvenating street trees as described in any one of claims 1-3, characterized in that, Includes the following steps: A water passage is dug between the tree pit (2) and the rejuvenation pit (3), and a graded sand and gravel water channel (4) is set up. One end of the graded sand and gravel water channel (4) is connected to the graded sand and gravel layer (31) of the rejuvenation pit (3), and the other end of the graded sand and gravel water channel (4) is connected to the interior of the upper part of the tree pit (2). Artificial mixed matrix is ​​filled into the rejuvenation pit (3) to form an artificial mixed matrix layer (32), and then graded sand and gravel are filled on the artificial mixed matrix layer (32) to form a graded sand and gravel layer (31).

5. The application of the device for rejuvenating street trees as described in any one of claims 1-3 in the evaluation of rejuvenation effects.

Images