Device for preventing root systems of border trees from arching upwards

Abstract

The invention discloses a device for preventing root systems of border trees from arching upwards, at least two water receiving plates which are arranged up and down are arranged on a trunk above an annular gap, and the outer diameter of each water receiving plate is larger than the inner diameter of a tree hole; each water receiving disc is composed of two semicircular discs, a semicircular pore plate is arranged in the middle of a side plate, close to the trunk, of each semicircular disc, flexible water absorbing materials are arranged between the semicircular pore plates and the trunk, and the semicircular pore plates are provided with a plurality of water passing holes enabling water absorbed by the flexible water absorbing materials to enter the semicircular discs; two adjacent pairs of straight side plates of the two semicircular discs are connected through two first elastic fasteners; each semicircular disc in each water receiving disc is of an elastic deformation structure; the bottom of each water pan is provided with two brackets which support the water pan and can deform, and flexible filler strips are arranged between the brackets and the trunk. The device prevents water from entering the protective sleeve from the annular gap between the trunk and the hole wall of the tree hole of the protective sleeve, and can effectively prevent the root system from arching in lateral growth and arching in upward growth.

Description

Technical Field

[0001] The invention relates to the technical field of urban street greening, in particular to a device for preventing the roots of roadside trees from arching upward. Background Art

[0002] The sidewalk slabs along city streets often have squares cut out to form planting holes, which hold soil, or soil mass, for transplanting street trees. However, as moisture in the soil increases, tree roots grow sideways or upward, potentially lifting the sidewalk slab around the top of the planting hole.

[0003] Currently, there are two main ideas and methods to prevent the roots of street trees from arching upward.

[0004] The first method involves trimming excess roots when transplanting trees, then inserting a small-diameter, high-rigidity steel casing into the ground where the trunk meets the ground to constrain root growth. However, this method is cumbersome, requires root pruning, and is detrimental to the growth of the transplanted trees, even leading to a relatively low survival rate. Therefore, this approach has been gradually phased out.

[0005] The second method involves pressing a large-diameter protective sleeve into the soil. This sleeve consists of a sleeve body and a top plate. The trunk passes through the top opening of the top plate, known as the tree hole, while the roots are housed within the sleeve. Multiple water pipes are fixed to the top plate. The design of this device is to quickly channel moisture from the upper soil into the soil below the roots through the water pipes, thereby attracting the roots to grow downward. This second type of device has a variety of specific structures, with different shapes and functions.

[0006] However, in actual use, it was discovered that the second prior art device for preventing the roots of street trees from arching upward has a common drawback: it still cannot fundamentally solve the technical problem of preventing the roots of street trees from arching upward. The reason is that as the trunk grows and thickens, to prevent the tree hole in the top plate of the protective cover from restricting the trunk from growing and thickening, a large gap, generally called an annular gap, is left between the tree hole wall and the trunk. Because there is no obstruction at the top, water seeps downward along the trunk, and some water still enters the protective cover through the annular gap along the trunk, causing the roots to continue to grow sideways or upward. Due to the large size of the protective cover, it is unrealistic to use high-strength steel plates to make the protective cover to restrict the lateral growth of the roots because the cost is too high. Even if the lateral growth of the roots is successfully restricted, it is impossible to prevent the roots from passing through the annular gap and growing upward from the soil on the top of the protective cover. Ultimately, the roots will still arch upward and damage the sidewalk slab. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a device for preventing the roots of street trees from arching up, which can prevent water from entering the protective cover through the annular gap between the tree trunk and the wall of the tree hole of the protective cover, and can effectively prevent the roots from growing up and arching laterally and upward.

[0008] The technical solution of the present invention is to provide a device for preventing the roots of street trees from growing upward, comprising a protective cover with a tree hole fitted over the trunk, an annular gap between the tree hole and the trunk to accommodate the growth of the trunk, and a top plate of the protective cover having a conical surface that is higher at the wall of the tree hole and lower at the outside. A plurality of water pipes are fixed to the top plate of the protective cover for directing water below the protective cover to guide the roots of the street trees to grow downward.

[0009] There are at least two water receiving trays arranged up and down on the tree trunk above the annular gap, and the outer diameter of each water receiving tray is larger than the inner diameter of the tree hole;

[0010] Each water receiving tray is composed of two semicircular trays. The middle of the side plate of each semicircular tray close to the trunk is a semicircular perforated plate. There is a flexible water-absorbing material between the semicircular perforated plate and the trunk. The semicircular perforated plate is provided with a plurality of water holes for the water absorbed by the flexible water-absorbing material to enter the semicircular tray.

[0011] The semicircular hole plate of the side plate of each semicircular disk close to the trunk is formed on both sides by a pair of straight side plates, and the two adjacent pairs of straight side plates of the two semicircular disks are connected by two first elastic fasteners;

[0012] The two pairs of straight side plates of the upper water receiving tray and the two pairs of straight side plates of the lower water receiving tray form an angle with each other;

[0013] The lower water tray has a structure where excess water overflows from the top surface of the semicircular side panel;

[0014] Each semicircular plate in each water receiving tray is an elastic deformation structure;

[0015] The bottom of each water tray is provided with two brackets for supporting the water tray, and the two brackets are connected by two second elastic fasteners; the respective semicircular clamps of the two brackets are made of deformable materials; and there is a flexible pad between the two semicircular clamps and the tree trunk.

[0016] After adopting the above structure, the device for preventing the roots of roadside trees from arching up has the following advantages:

[0017] The existing technology is equipped with a protective cover and a water pipe to prevent the roots of street trees from arching upward. The reason why it cannot fundamentally solve the technical problem of preventing the roots from growing upward is mainly because it has never solved the problem of water seepage in the annular gap of the tree hole. If the tree hole is left small, the tree trunk will be prevented from growing normally and becoming thicker. If the tree hole is left large, water from the trunk can still enter the protective cover, and the roots in the protective cover can still grow upward from the annular gap or break the protective cover and arch up the sidewalk.

[0018] The present invention adopts creative thinking. The tree hole still retains the diameter that the trunk should have as it grows and becomes thicker, that is, the annular gap is still retained, and two water receiving trays with staggered connection gaps and an outer diameter larger than the inner diameter of the tree hole are fixed on the trunk above the tree hole to collect water. Elastic fasteners are used to elastically fasten the two semicircular trays of the water receiving tray and the two brackets supporting the water receiving tray to the tree trunk, that is, the fasteners are elastic, the water receiving tray is an elastic structure with deformation ability, the supporting frame has deformation ability, and there is a flexible water-blocking material between the water receiving tray and the trunk, and there is also a flexible material between the supporting frame and the trunk, which not only fixes the water receiving tray but also does not affect the normal growth and thickening of the tree trunk, especially the arrangement of the water-absorbing material and the water hole into the water receiving tray. If excess water is present in the water inlet and lower water receiving trays, it overflows from the top surface of the semicircular side panels. This prevents water from flowing down the trunk through the annular gap and into the protective cover. Figuratively speaking, the two water receiving trays, with their upper and lower connecting gaps offset from each other, act like two water shut-off gates, blocking the path of water seeping down the trunk. The two water receiving trays also act like an umbrella, effectively shielding the annular gap between the tree hole in the top plate of the protective cover and the tree trunk. As mentioned above, both the water shut-off gate and the water-blocking umbrella are capable of adaptively deforming as the trunk grows and thickens, thus not hindering the normal growth and thickening of the trunk and fundamentally resolving the technical problem of water seeping downward from the trunk. This is the core point of the present invention. Water is effectively prevented from entering the protective cover through the annular gap between the trunk and the wall of the tree hole in the protective cover, effectively preventing roots from growing laterally or upwardly and damaging the sidewalk slab.

[0019] Furthermore, the outer diameter of the water tray is 2 to 3 times the inner diameter of the tree hole. With this structure, if the diameter of the tree hole is 0.3 meters, the diameter of the water tray is 0.6-0.9 meters. This further ensures that water is prevented from entering the protective cover through the annular gap between the tree trunk and the wall of the tree hole in the protective cover, and effectively prevents roots from growing sideways and upwards and arching up, thereby damaging the sidewalk slab.

[0020] Furthermore, the two pairs of straight side panels of the upper water tray and the two pairs of straight side panels of the lower water tray form a 90° angle with each other. With this structure, all water from the upper water tray is collected by the lower water tray, further preventing water from entering the protective cover through the annular gap between the tree trunk and the wall of the tree hole in the protective cover, and effectively preventing roots from growing laterally or upward, causing damage to the sidewalk slab.

[0021] Furthermore, the structure of the first elastic fastener is as follows: a first screw with a first axially limiting large head passes through two parallel straight side plates, a first compression spring in a naturally stretched state is fitted on the free end of the first screw, the inner end of the first compression spring abuts against the straight side plate, and the outer end of the first compression spring is axially limited by the first nut; the structure of the second elastic fastener is as follows: a second screw with a second axially limiting large head passes through two parallel straight connecting plates on one side of the two semicircular clamps, a second compression spring in a naturally stretched state is fitted on the free end of the second screw, the inner end of the second compression spring abuts against the straight connecting plate, and the outer end of the second compression spring is axially limited by the second nut. After the elastic fastener adopts the above specific structure, the elastic fastening effect is better, which not only basically guides the water on the tree trunk into the water receiving tray, preventing water on the tree trunk from entering the protective sleeve through the annular gap, but also ensures the normal growth and thickening of the tree trunk.

[0022] Furthermore, the elastic deformation structure of each semicircular disk is as follows: the semicircular perforated plate of the side plate close to the trunk is a first arc-shaped steel plate capable of generating deformation, the two straight side plates are two vertical corrugated steel plates, the inner sides of the two vertical corrugated steel plates are welded and fixed to the first arc-shaped steel plate, and the outer sides of the two vertical corrugated steel plates are welded and fixed to the two sides of a semicircular arc-shaped side plate composed of a second arc-shaped steel plate capable of generating deformation; the semicircular bottom plate is a horizontal corrugated steel plate with a semicircular arc gradually increasing from the inner side to the outer side, and the outer semicircular arc of the horizontal corrugated steel plate is welded and fixed to the bottom surface of the arc-shaped side plate of the second arc-shaped steel plate; the horizontal corrugated steel plate and the vertical corrugated steel plate have gaps between each other for their respective expansion and contraction deformation, and the inner bottom of each semicircular disk is paved with a waterproof membrane that blocks the gap; soil is compacted in the semicircular disk on the top surface of the waterproof membrane, and hydrophilic plants are planted in the soil. After adopting the above structure, it is further ensured that the water of the tree trunk is introduced into the water receiving tray to prevent the water on the tree trunk from entering the protective cover through the annular gap and causing the root system to grow sideways or upward and arch upward, and the technical effect of ensuring the normal growth and thickening of the tree trunk is achieved; because the hydrophilic plants can absorb part of the water and appropriately evaporate part of the water after the water inflow stops, it is more conducive to preventing the water from flowing down the tree trunk; and because the plants such as flowers on the two water receiving trays higher than the sidewalk slab can have a new ornamental function.

[0023] Furthermore, the upper water tray also has a structure that allows excess water to overflow from the top surface of the semicircular side panels. The structure for each water tray to overflow from the top surface of the semicircular side panels is as follows: the height of each semicircular tray's side panel near the tree trunk is higher than the height of the second curved steel plate, so that excess water in the semicircular tray overflows from the top surface of the second curved steel plate. With this specific structure, any excess water will only overflow from the top surface of the semicircular side panels, further ensuring the technical effect of preventing water on the tree trunk from entering the protective cover through the annular gap and causing the roots to grow sideways or upward and arch upward, while also ensuring the normal growth and thickening of the tree trunk.

[0024] Furthermore, the flexible water-absorbing material between the semicircular perforated plate and the tree trunk is a semicircular sponge plate. With the above structure, the semicircular sponge plate fully utilizes its flexibility to prevent the tree trunk from being crushed, and fully utilizes its water-absorbing function. Water enters the water receiving tray through the multiple water holes in the semicircular perforated plate, further ensuring the technical effect of preventing water on the tree trunk from entering the protective cover through the annular gap and causing the roots to grow sideways or upward and arch upward, while ensuring the normal growth and thickening of the tree trunk.

[0025] Furthermore, the flexible pad is a semicircular rubber pad and the bottom end of a semicircular sponge board, and the top surface of the semicircular rubber pad is glued and fixed to the bottom surface of the semicircular sponge board. After adopting the above structure, because the force for holding the tree trunk is mainly applied by the two brackets and the elastic fastener, and the semicircular rubber pad and the bottom end of the semicircular sponge board are arranged between the semicircular clamp of the bracket and the tree trunk, the flexible function is further fully utilized to prevent the tree trunk from being crushed, and the water on the tree trunk from seeping into the protective cover is further ensured to prevent water on the tree trunk from entering the protective cover through the annular gap and causing the roots to grow sideways or upward and arch upward, while ensuring the normal growth and thickening of the tree trunk.

[0026] Furthermore, the semicircular clamp of each bracket is constructed by welding a deformable third curved steel plate to two deformable straight connecting steel plates on either side. The straight connecting steel plates on both sides are aligned, and multiple vertical reinforcing ribs are welded to the outside of each third curved steel plate. This structure enhances the bracket's deformability, further ensuring that water from the tree trunk enters the protective sleeve through the annular gap, causing the roots to grow sideways or upward and arch upward, while also ensuring the normal growth and thickening of the tree trunk.

[0027] Furthermore, the protective cover is placed within the soil of the planting hole. The protective cover has an upwardly protruding rim along its circumference. A layer of soil planted with hydrophilic plants is located on the top plate within the rim. The circular portion of the top plate outside the circular tree hole protrudes above the top surface of the soil within the rim. With this structure, the soil above the top plate of the protective cover essentially only contains water that seeps down from the outer edge of the water receiving tray. However, the majority of the water is directed through the water conduit inlet on the top plate of the protective cover into the soil below the protective cover, where roots grow downward. A small amount of water is absorbed by the hydrophilic plants and soil, and some evaporates after the water inflow stops. This further ensures that water from the tree trunk does not enter the protective cover through the annular gap. Plants within the rim, such as flowers and shrubs, also possess a new ornamental function. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a preferred embodiment of the device for preventing the roots of street trees from arching up, which is placed in a planting hole.

[0029] Figure 2 yes Figure 1Schematic diagram of the structure of the half-section sidewalk slab and soil.

[0030] Figure 3 yes Figure 2 Schematic diagram of the structure after the protective cover is cut in half and the tree and water tray are omitted.

[0031] Figure 4 yes Figure 1 The diagram in the figure changes the angle and omits the two ends of the tree trunk to show an enlarged structural diagram of a bracket for a water tray.

[0032] Figure 5 It is a schematic diagram of the structure of the water receiving tray in the present invention from a side view.

[0033] Figure 6 yes Figure 5 Schematic diagram of the exploded structure of the water collecting pan exploding into a semicircular pan and another semicircular pan component.

[0034] As shown in the figure:

[0035] 1. Street trees, 11. Trunks;

[0036] 2. Protective sleeve, 21. Tree hole, 211. Annular gap, 22. Top plate, 23. Water guide pipe, 231. Water inlet, 24. Sleeve body;

[0037] 3. Water receiving tray, 31. Semicircular tray, 311. First curved steel plate, 3111. Water hole, 312. Vertical corrugated steel plate, 313. Second curved steel plate, 314. Horizontal corrugated steel plate, 315. Slit;

[0038] 4. Bracket, 41. Third curved steel plate, 42. Straight connecting steel plate, 43. Vertical reinforcing ribs;

[0039] 51. Semicircular sponge board, 52. Semicircular rubber pad;

[0040] 6. Raised ring;

[0041] 7. First elastic fastener, 71. First screw, 711. First axial limiting big end, 712. Free end of first screw, 72. First compression spring, 73. First nut;

[0042] 8. Second elastic fastener, 81. Second screw, 811. Second axial limiting big end, 82. Second compression spring, 812. Free end of second screw, 83. Second nut;

[0043] 91. Planting hole, 92. Sidewalk slab, 93. Soil. DETAILED DESCRIPTION

[0044] The following is a further description of specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that the description of these specific embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. Furthermore, the technical features involved in the various specific embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown.

[0046] The sidewalk slabs 92 on both sides of the city streets generally have a hollowed-out square area to form a planting hole 91 to accommodate soil 93 or soil, and the planting is generally transplanting street trees 1.

[0047] A preferred embodiment of the present invention's device for preventing the root system of roadside trees from arching upward comprises a protective cover 2 with a tree hole 21 that fits over a tree trunk 11. The protective cover 2 comprises a sleeve body 24 and a top plate 22 secured and sealed to the top surface of the sleeve body 24. The center of the top plate is the tree hole 21, and an annular gap 211 is defined between the tree hole 21 and the trunk 11 to accommodate the length and thickness of the trunk 11. The top plate 22 of the protective cover 2 is a conical surface that is higher at the wall of the tree hole 21 and lower on the outside. Multiple water pipes 23 are fixed to the top plate 22 of the protective cover 2 to direct water below the protective cover 2, thereby guiding the downward growth of the roots of the roadside tree 1.

[0048] The top surface of the water inlet 231 of each water pipe 23 can be flush with the top surface of the top plate 22 of the protective cover 2. In this way, if water flows from the outer edge of the water receiving tray 3 to the top plate 22 of the protective cover 2, most of it will be introduced into the soil 93 formed by the roots of the street trees 1 below the protective cover 2 through the water pipe 23.

[0049] It is readily understood that, during the specific construction process, the protective cover 2 can be made of materials such as plastic. The protective cover can be comprised of two half-sleeves secured together via a connecting plate and multiple bolts and nuts, with a sealing gasket positioned between the two half-sleeves. The water conduit 23 can also be referred to as a water diversion pipe. The plurality of water conduits 23 can range from a dozen to several dozen, or can be referred to as a "several" or "a plurality."

[0050] At least two, for example, two, water-receiving trays 3 are arranged one above the other on the trunk 11 above the annular gap 211. The outer diameter of each water-receiving tray 3 is larger than the inner diameter of the tree hole 21. For example, the outer diameter of the water-receiving tray 3 can be two to three times the inner diameter of the tree hole 21. It is understood that the outer diameter of the water-receiving tray refers to the distance between the outer surfaces of the two semicircular side panels, namely, the second curved steel plate 313, along a diameter line passing through the center of the circle. Both the inner diameter and the outer diameter can be referred to as the diameter.

[0051] Of course, the outer diameter of the water receiving tray 3 located below can be larger than the outer diameter of the water receiving tray 3 located above, so as to prevent water from entering the protective cover 2 from the annular gap 211 between the tree trunk 11 and the wall of the tree hole 21 of the protective cover 2, and effectively prevent the roots of the street tree 1 from growing laterally and growing upward to arch and damage the sidewalk slab 92. The technical effect is better.

[0052] Each water receiving tray 3 is composed of two semicircular trays 31. A semicircular perforated plate is located in the middle of the side panel of each semicircular tray 31 near the trunk 11. Flexible water-absorbing material is positioned between the semicircular perforated plate and the trunk 11. The semicircular perforated plate, such as a first curved steel plate 311 described below, is provided with multiple water holes 3111, which allow water absorbed by the flexible water-absorbing material to enter the semicircular tray 31. The flexible water-absorbing material between the semicircular perforated plate, such as the first curved steel plate 311 described below, and the trunk 11 can be a semicircular sponge plate 51. The water holes 3111 are also called water-permeable holes. The "multiple" of the plurality of water holes 3111 can be dozens, several dozen, or even a plurality.

[0053] Each semicircular disk 31 has a semicircular perforated plate on the side panel near the trunk 11, such as the first curved steel plate 311 described below, and is flanked by a pair of straight side panels, such as the vertical corrugated steel plates 312 described below. The two adjacent pairs of straight side panels, such as the vertical corrugated steel plates 312 described below, of the two semicircular disks 31 are connected by two first elastic fasteners 7. The specific structure of the first elastic fastener 7 can be as follows: a first screw rod 71 with a first axially limiting large head 711 passes through two parallel straight side panels, such as the two vertical corrugated steel plates 312, and a first compression spring 72 in a naturally stretched state is fitted on the free end 712 of the first screw rod. The inner end of the first compression spring 72 abuts against a straight side panel, such as one of the vertical corrugated steel plates 312, and the outer end of the first compression spring 72 is axially limited by a first nut 73.

[0054] The two pairs of straight side plates of the upper water receiving tray, i.e., the water receiving tray 3 located above, such as the two pairs of vertical corrugated steel plates 312, and the two pairs of straight side plates of the lower water receiving tray, i.e., the water receiving tray 3 located below, such as the two pairs of vertical corrugated steel plates 312, are at an angle to each other. For example, the two pairs of straight side plates of the upper water receiving tray, i.e., the water receiving tray 3 located above, such as the two pairs of vertical corrugated steel plates 312, and the two pairs of straight side plates of the lower water receiving tray, i.e., the water receiving tray 3 located below, such as the two pairs of vertical corrugated steel plates 312, can be at a 90° angle to each other.

[0055] The lower water receiving tray has a structure for allowing excess water to overflow from the top surface of the semi-circular side panels; the upper water receiving tray may also have a structure for allowing excess water to overflow from the top surface of the semi-circular side panels. The structure for allowing excess water to overflow from the top surface of the semi-circular side panels of each water receiving tray 3 is preferably: the height of the side panels of each semi-circular tray 31 close to the tree trunk 11, such as the first curved steel plate 311 and the vertical corrugated steel plate 312, is higher than the height of the semi-circular side panels, i.e., the second curved steel plate 313 described below (not shown in the figure), so that excess water in the semi-circular tray overflows from the top surface of the semi-circular side panels, i.e., the second curved steel plate 313 described below. Of course, the overflow structure can also be one or more overflow holes or overflow notches provided at the top of the semi-circular side panels, such as the second curved steel plate 313. The semi-circular side panels are also called semicircular side panels.

[0056] Each semicircular plate 31 in each water receiving tray 3 is an elastically deformable structure; the specific structure of the elastic deformation of each semicircular plate 31 is preferably as follows: the semicircular perforated plate of the side plate near the trunk 11 is a deformable first curved steel plate 311, the two straight side plates are two vertical corrugated steel plates 312, the inner sides of the two vertical corrugated steel plates 312 are welded to the first curved steel plate 311, and the outer sides of the two vertical corrugated steel plates 312 are welded to the two sides of the semicircular side plate composed of a deformable second curved steel plate 313. The semicircular bottom plate of the semicircular plate 311 is a horizontally corrugated steel plate 314 with a gradually increasing semicircular arc from the inner side to the outer side, and the outer semicircular arc of the horizontal corrugated steel plate 314 is welded to the bottom surface of the second curved steel plate 313 of the curved side plate. A gap 315, or clearance, is left between the horizontal corrugated steel plates 314 and the vertical corrugated steel plates 312 to allow for expansion and contraction of each corrugated steel plate. The inner bottom of each semicircular plate 31 is lined with a waterproof membrane, blocking the gap 315 and preventing water from seeping through it. Soil is compacted within the semicircular plates 31 on top of the waterproof membrane, and hydrophilic plants are planted within the soil. These hydrophilic plants include hydrophilic flowers or shrubs. It is easy to understand that the upper water receiving tray 3 comprises two semicircular plates 31, and the lower water receiving tray 3 also comprises two semicircular plates 31.

[0057] The above specific structure uses a semicircular sponge plate 51 to press against the tree trunk 11 to absorb water, and the flowers and soil inside the semicircular plate absorb this water, thus blocking the path of water seeping down the tree trunk 11. Furthermore, the two upper and lower water trays 3 also form an umbrella-like effect, shielding and protecting the soil 93 surrounding the tree trunk below, further preventing accumulated water from seeping down. The two pairs of straight side panels of the upper and lower water trays 3 are arranged at a 90-degree angle, which not only adapts to the outward expansion of the water trays 3 as the tree trunk 11 grows, but also blocks the gap between the two semicircular plates 31 of each layer of water tray 3 at the connection of the first elastic fastener 7.

[0058] Each water tray 3 has two brackets 4 at the bottom to support the water tray 3. The two brackets 4 are connected by two second elastic fasteners 8. The semicircular clamps of the two brackets 4 are made of a deformable material. A flexible pad is provided between the two semicircular clamps, such as the third curved steel plate 41 described below, and the tree trunk 11. The specific structure of the second elastic fastener 8 can be as follows: a second screw 81 with a second axially limiting large head 811 passes through two semicircular clamps, such as two parallel straight connecting plates, such as the two straight connecting plates 42, on one side of the third curved steel plate 41. A second compression spring 82 in a naturally stretched state is fitted on the free end 812 of the second screw. The inner end of the second compression spring 82 abuts against a straight connecting plate, such as one of the two parallel straight connecting plates 42. The outer end of the second compression spring 82 is axially limited by a second nut 83.

[0059] The semicircular clamp of each bracket 4 is formed by welding a deformable third curved steel plate 41 to two deformable straight connecting steel plates 42 on either side. Welding is also referred to as welding fixation. The straight connecting steel plates 42 on either side of each third curved steel plate 41 are aligned in a straight line. Multiple, for example, three, vertical reinforcing ribs 43 are welded to the outside of each third curved steel plate 41. Multiple vertical reinforcing ribs 43 can also be called cantilevers.

[0060] The deformation of the semicircular clamp provides a reasonable amount of retraction for thickening or thickening the trunk 1. This retraction can be understood in two ways: First, the semicircular clamp expands radially outward, compressing the second compression spring 82. In layman's terms, the distance between the two semicircular clamps, such as the two third curved steel plates 41 and the two straight connecting steel plates 42 on either side, increases. Second, because the semicircular clamp utilizes a deformable third curved steel plate 41, and the two straight connecting steel plates 42 on either side also utilize deformable elastic steel plates, as the radius of the trunk 11 increases, the arcuate edge of the semicircular clamp's third curved steel plate 412, which coincides with the radius of the trunk 11, becomes longer, while the two straight connecting steel plates 42 on either side become shorter.

[0061] It is not difficult to understand that the second elastic connector 8 is to clamp the bracket 4 and support the water tray 3, so it has a relatively thick diameter or is called a large screw, a large nut, and a large compression spring. The first elastic connector 7 only plays a pulling role to prevent the two semicircular disks 31 from detaching from each other, and does not bear any supporting force, so relatively speaking, it has a smaller diameter or is called a small screw, a small nut, and a small compression spring. The compression spring is also called a support spring. The first elastic connector 7 of this preferred embodiment is two, symmetrically arranged on the respective vertical corrugated steel plates 312 on both sides of the first curved steel plate 311. The second elastic connector 8 is also two, symmetrically arranged on the respective vertical corrugated steel plates 312 on both sides of the third curved steel plate 41.

[0062] The flexible pads can be semicircular rubber pads 52 and the bottom ends of the semicircular sponge plates 51, and the top surfaces of the semicircular rubber pads 52 and the bottom surfaces of the semicircular sponge plates 51 can be glued and fixed. Of course, the flexible pads can also be only semicircular rubber pads 52, and the top surfaces of the semicircular rubber pads 52 and the bottom surfaces of the semicircular sponge plates 51 can be glued and fixed.

[0063] The protective cover 2 is placed in the soil 93 of the planting hole 91. The peripheral edge of the protective cover 2 may have an upwardly protruding convex ring 6. A layer of soil 93 planted with hydrophilic plants may be provided on the top plate 22 inside the convex ring 6. The circular portion of the top plate 22 outside the circular tree hole 21 may protrude above the top surface of the soil 93 inside the convex ring 6.

[0064] It is easy to understand that the sidewalk slab 92 is also called a street slab or a sidewalk paving slab. The soil 93 is also called soil. The tree hole 21 is also called a trunk hole or the upper opening of the protective cover or the upper opening of the top plate. The protective cover 2 is also called a protective cover. The water receiving tray 3 is also called a water receiving basin or a water receiving box. The semicircular plate 31 is also called a half-moon plate or a semicircular basin or a semi-moon basin or a semicircular box or a semi-moon box. The clamp is also called a clamp. The first screw 71 passing through the vertical corrugated steel plate 312 means passing through the screw hole reserved on the vertical corrugated steel plate 312; similarly, the second screw 81 passing through the straight connecting steel plate 42 means passing through the screw hole reserved on the straight connecting steel plate 42. The semicircular plate 31 refers to the semicircular plate 31 when viewed from above. Similarly, the vertical corrugated steel plate 312 refers to the corrugated steel plate when viewed from above. The horizontal corrugated steel plate 314 refers to the corrugated steel plate when viewed from the inside horizontally. The semicircular orifice plate refers to the two semicircular plates such as the first arc-shaped steel plate 311 that constitute the tree hole 21. As for whether the semicircular plates such as the first arc-shaped steel plate 311 are provided with multiple water holes 3111, it is another matter and has no direct relationship with the name of the semicircular orifice plate.

[0065] Parts, structures, quantities, etc. not marked above are not shown in the drawings, and some parts are not marked in the drawings. The drawings are for illustration only. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0066] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for preventing the roots of roadside trees from growing upward, comprising a protective cover with a tree hole fitted over the trunk, an annular gap between the tree hole and the trunk to accommodate the trunk's growth, a top plate of the protective cover having a conical surface that is higher at the tree hole wall and lower at the outside, and multiple water pipes fixed to the top plate of the protective cover for directing water below the protective cover to guide the roots of the roadside trees downward; characterized by: There are at least two water receiving trays arranged up and down on the tree trunk above the annular gap, and the outer diameter of each water receiving tray is larger than the inner diameter of the tree hole; Each water receiving tray is composed of two semicircular trays. The middle of the side plate of each semicircular tray close to the trunk is a semicircular perforated plate. There is a flexible water-absorbing material between the semicircular perforated plate and the trunk. The semicircular perforated plate is provided with a plurality of water holes for the water absorbed by the flexible water-absorbing material to enter the semicircular tray. The semicircular hole plate of the side plate of each semicircular disk close to the trunk is formed on both sides by a pair of straight side plates, and the two adjacent pairs of straight side plates of the two semicircular disks are connected by two first elastic fasteners; The two pairs of straight side plates of the upper water receiving tray and the two pairs of straight side plates of the lower water receiving tray form an angle with each other; The lower water tray has a structure where excess water overflows from the top surface of the semicircular side panel; Each semicircular plate in each water receiving tray is an elastic deformation structure; The bottom of each water tray is provided with two brackets for supporting the water tray, and the two brackets are connected by two second elastic fasteners; the respective semicircular clamps of the two brackets are made of deformable materials; and there is a flexible pad between the two semicircular clamps and the tree trunk.

2. The device for preventing the roots of roadside trees from arching upward according to claim 1, characterized in that: The outer diameter of the water tray is 2 to 3 times the inner diameter of the tree hole.

3. The device for preventing roadside tree roots from arching upward according to claim 1, characterized in that: The two pairs of straight side plates of the upper water receiving tray and the two pairs of straight side plates of the lower water receiving tray form a 90° angle with each other.

4. The device for preventing roadside tree roots from arching upward according to claim 1, characterized in that: The first elastic fastener is structured as follows: a first screw with a first axially limiting large head passes through two parallel straight side plates; a first compression spring in a naturally stretched state is sleeved on the free end of the first screw; the inner end of the first compression spring abuts against the straight side plate; and the outer end of the first compression spring is axially limited by a first nut; The structure of the second elastic fastener is as follows: a second screw with a second axial limiting big head passes through two straight connecting plates parallel to each other on one side of the two semicircular clamps, a second compression spring in a naturally stretched state is fitted on the free end of the second screw, the inner end of the second compression spring is against a straight connecting plate, and the outer end of the second compression spring is axially limited by the second nut.

5. The device for preventing roadside tree roots from arching up according to claim 1, characterized in that: The elastic deformation structure of each semicircular disk is as follows: the semicircular perforated plate of the side plate close to the trunk is a first arc-shaped steel plate that can generate deformation, the two straight side plates are two vertical corrugated steel plates, the inner sides of the two vertical corrugated steel plates are welded and fixed to the first arc-shaped steel plate, and the outer sides of the two vertical corrugated steel plates are welded and fixed to the two sides of a semicircular arc-shaped side plate composed of a second arc-shaped steel plate that can generate deformation; the semicircular bottom plate is a horizontal corrugated steel plate with a semicircular arc that gradually increases from the inner side to the outer side, and the outer semicircular arc of the horizontal corrugated steel plate is welded and fixed to the bottom surface of the arc-shaped side plate of the second arc-shaped steel plate; a gap is left between the horizontal corrugated steel plate and the vertical corrugated steel plate for their respective expansion and contraction deformation, and the inner bottom of each semicircular disk is paved with a waterproof membrane that blocks the gap; soil is compacted in the semicircular disk on the top surface of the waterproof membrane, and hydrophilic plants are planted in the soil.

6. The device for preventing roadside tree roots from arching up according to claim 5, characterized in that: The upper water receiving tray also has a structure for allowing excess water to overflow from the top surface of the semicircular side plate; the structure for allowing excess water to overflow from the top surface of the semicircular side plate of each water receiving tray is as follows: the height of the side plate of each semicircular tray close to the tree trunk is higher than the height of the second curved steel plate, so that excess water in the semicircular tray overflows from the top surface of the second curved steel plate.

7. The device for preventing roadside tree roots from arching up according to claim 1, characterized in that: The flexible water-absorbing material between the semicircular hole plate and the tree trunk is a semicircular sponge plate.

8. The device for preventing roadside tree roots from arching up according to claim 7, characterized in that: The flexible pad is a semicircular rubber pad and the bottom end of the semicircular sponge plate. The top surface of the semicircular rubber pad is fixed to the bottom surface of the semicircular sponge plate by adhesive bonding.

9. The device for preventing roadside tree roots from arching upward according to claim 1, characterized in that: The semicircular clamp of each bracket is composed of a deformable third arc steel plate welded with deformable straight connecting steel plates on both sides. The straight connecting steel plates on both sides are on the same straight line, and multiple vertical reinforcing ribs are welded and fixed on the outside of each third arc steel plate.

10. The device for preventing roadside tree roots from arching upward according to claim 1, characterized in that: The protective cover is placed in the soil of the planting hole. The protective cover has an upward protruding convex circle along its circumference. A layer of soil planted with hydrophilic plants is provided on the top plate inside the convex circle. The circular part of the top plate outside the circular tree hole protrudes above the top surface of the soil inside the convex circle.

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