Garden pebble paving structure and paving method thereof

Abstract

The invention discloses a garden pebble paving structure and a paving method thereof, and belongs to the technical field of garden landscapes, the garden pebble paving structure comprises a water-permeable concrete layer, a water guide grid layer, an elastic bonding layer and a pebble surface layer, the water guide grid layer is paved above the water-permeable concrete layer, the water guide grid layer comprises an HDPE three-dimensional honeycomb grid, the elastic bonding layer is arranged above the elastic bonding layer, and the pebble surface layer is arranged above the elastic bonding layer. And the HDPE three-dimensional honeycomb grids are filled with zeolite particles. Mechanical interlocking is formed through the surface etched pebbles and the glass fiber nails, and the risk of frost heaving and falling is thoroughly eliminated in combination with the deformation adaptive capacity of the elastic bonding layer; the honeycomb water guide grid layer realizes transverse flow guide of rainwater, and the pervious concrete foundation layer accelerates vertical permeation, so that a water-accumulation-free pavement system is constructed; the microcapsules automatically repair cracks, and the zeolite filters and purifies rainwater, so that the maintenance cost is remarkably reduced; the manual efficiency bottleneck is broken through by the mechanical paving and UV light curing process, and the large-area paving flatness is guaranteed; and finally, the whole-life-cycle maintenance-free ecological paving effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of garden landscape, and particularly relates to a garden pebble paving structure and a paving method thereof. Background Art

[0002] Garden pebble paving (including pebbles, rain flower stones, etc.) is widely used in garden landscapes because of its natural simplicity, rich texture, and special feel underfoot.

[0003] Existing pebble paving has the following problems: the traditional cement mortar bonding layer is prone to frost heave and cracking, causing the pebbles to fall off; the dense seam paving leads to poor drainage, causing water accumulation after rain; and manual paving is inefficient.

[0004] Therefore, in response to the above-mentioned technical problems, it is necessary to provide a kind of garden pebble paving structure and paving method thereof.

[0005] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a garden pebble paving structure and a paving method thereof, which can solve the problem that traditional cement mortar is prone to frost heave and cracking, resulting in pebbles falling off, and the problem that dense seam paving leads to poor drainage.

[0007] In order to achieve the above object, a specific embodiment of the present invention provides the following technical solutions:

[0008] A garden pebble paving structure includes a permeable concrete layer, a water-conducting grid layer, an elastic bonding layer, and a pebble surface layer. The permeable concrete layer is set to have a thickness of 80-120 mm, a compressive strength of ≥15 MPa, and a porosity of 25%-30%. The water-conducting grid layer is laid on top of the permeable concrete layer. The water-conducting grid layer includes a HDPE three-dimensional honeycomb grid filled with zeolite particles. The height of the HDPE three-dimensional honeycomb grid is set to 20±2 mm, and the particle size of the zeolite particles is 3- 5mm; an elastic bonding layer is laid on top of the water-conducting grid layer, the thickness of the elastic bonding layer is 3-5mm, and the elastic bonding layer is composed of 100 parts of epoxy resin, 30 parts of modified polysulfide rubber, 150 parts of quartz sand, 25 parts of curing agent T31 and 0.3wt% of carbon nanotubes; a pebble surface layer is laid on the elastic bonding layer, and the pebble surface layer is composed of pebble particles with a particle size of 20-50, the surface of the elastic bonding layer is sandblasted and etched to form an anchor point structure with a depth of 80±10μm, and a plurality of conical grooves are pre-set at the bottom of the pebble surface layer.

[0009] In one or more embodiments of the present invention, the permeable concrete layer contains sulfur-oxidizing bacteria immobilized particles and nano-zero-valent iron, and a gravel blind ditch is provided below the permeable concrete layer.

[0010] In one or more embodiments of the present invention, the water-conducting grid layer is connected to a photovoltaic-driven capillary water supply system, which includes photovoltaic panels laid on the edge of the pavement, a micro water pump, and microporous water supply pipes embedded in the gaps between pebbles.

[0011] In one or more embodiments of the present invention, urea-formaldehyde resin microcapsules are dispersed in the elastic bonding layer, the core material of the microcapsules includes a silane coupling agent and an epoxy prepolymer, and the mass of the microcapsules accounts for 5-8% of the total weight of the elastic bonding layer.

[0012] In one or more embodiments of the present invention, 0.5 wt% of boron nitride and shape memory polymer microspheres are added to the elastic bonding layer, and the volume fraction of the microspheres in the elastic bonding layer is 15-20%.

[0013] In one or more embodiments of the present invention, distributed optical fiber sensors and piezoelectric ceramic pieces are embedded in the gaps between the pebbles of the pebble surface layer, with a sensor spacing of 200×200 mm, to monitor strain values and falling risks in real time.

[0014] In one or more embodiments of the present invention, a fiberglass nail is embedded in the conical groove, the length and diameter of the fiberglass nail are set to 4 mm and 0.5 mm respectively, and the fiberglass nail forms a mechanical interlocking structure with the elastic adhesive layer.

[0015] In one or more embodiments of the present invention, the surface of the pebbles of the pebble surface layer is coated with a SiO2 and TiO2 composite sol super-hydrophobic coating, and the thickness of the super-hydrophobic coating is 0.5-1 μm.

[0016] A method for laying a garden pebble paving structure comprises the following steps:

[0017] S1. Pebble pretreatment: Use 120 mesh corundum to sandblast and etch the pebble surface, and spray SiO2 and TiO2 composite sol coating;

[0018] S2. Foundation construction: Lay the rammed earth layer, graded crushed stone layer, and permeable concrete layer in sequence, and embed the water-conducting grid layer before the permeable concrete begins to set;

[0019] S3. Elastic bonding layer construction: spray elastic adhesive to the surface of the water-conducting grid layer, controlling the thickness to 3-5mm;

[0020] S4, mechanical paving: The pebbles are arranged in a preset pattern using a vacuum adsorption robot so that the grooves at the bottom of the pebbles are aligned with the fiberglass nails in the adhesive layer;

[0021] S5. Vibration curing: Use a vibration leveler with an amplitude of 0.8-1.0mm for compaction, and cure with UV light for 30-60 seconds.

[0022] In one or more embodiments of the present invention, in S4, when the ambient temperature is less than 5°C, a double-layer embedding process is adopted: first embedding the pebbles to a depth of 1 / 3 → UV pre-curing → secondary glue coating → embedding to a depth of 2 / 3 → final curing; when the ambient temperature is greater than 30°C, 0.1wt% retarder is added to the adhesive, and after vibration and leveling, it is left to stand for 5 minutes before UV curing.

[0023] Compared with the existing technology, the present invention forms mechanical interlocking through surface-etched pebbles and glass fiber nails, combined with the deformation adaptability of the elastic adhesive layer, to completely eliminate the risk of frost heave and falling off; the honeycomb water-conducting grid layer realizes the lateral diversion of rainwater, and the permeable concrete base layer accelerates vertical infiltration to build a water-free paving system; microcapsules autonomously repair cracks, and zeolite filters and purifies rainwater, significantly reducing maintenance costs; mechanized paving and UV light curing technology break through the bottleneck of manual efficiency and ensure the flatness of large-area paving; ultimately achieving a maintenance-free ecological paving effect throughout the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of a garden pebble paving structure according to an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the water guide grid in the present invention.

[0027] Description of main reference numerals:

[0028] 1-permeable concrete layer, 2-water-conducting grid layer, 21-HDPE three-dimensional honeycomb grid, 22-zeolite particles, 3-elastic bonding layer, 4-pebble surface layer, 41-conical groove, 5-fiberglass nails. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, a garden pebble paving structure in one embodiment of the present invention includes a permeable concrete layer 1, a water-conducting grid layer 2, an elastic bonding layer 3 and a pebble surface layer 4. The thickness of the permeable concrete layer 1 is set to 80-120 mm, the compressive strength of the permeable concrete layer 1 is ≥15 MPa, and the porosity is 25%-30%; the water-conducting grid layer 2 is laid on the permeable concrete layer 1, and the water-conducting grid layer 2 includes an HDPE three-dimensional honeycomb grid 21, and the HDPE three-dimensional honeycomb grid 21 is filled with zeolite particles 22. The height of the HDPE three-dimensional honeycomb grid 21 is set to 20±2 mm, and the zeolite particles 22 are filled in the HDPE three-dimensional honeycomb grid 21. The particle size of the particles 22 is 3-5 mm; the elastic bonding layer 3 is laid on top of the water-conducting grid layer 2, the thickness of the elastic bonding layer 3 is 3-5 mm, and the elastic bonding layer 3 is composed of 100 parts of epoxy resin, 30 parts of modified polysulfide rubber, 150 parts of quartz sand, 25 parts of curing agent T31 and 0.3wt% of carbon nanotubes; the pebble surface layer 4 is laid on the elastic bonding layer 3, and the pebble surface layer 4 is composed of pebble particles with a particle size of 20-50. The surface of the elastic bonding layer 3 is sandblasted and etched to form an anchor point structure with a depth of 80±10 μm, and a plurality of conical grooves 41 are pre-set at the bottom of the pebble surface layer 4.

[0031] Specifically, a 150mm graded crushed stone cushion layer and an 80mm permeable concrete base layer are laid in sequence on a plain soil foundation with a compaction degree of ≥93%. The mix ratio is: 42.5R Portland cement: 5-10mm crushed stone: water = 100:180:35, and 1.5wt% nano zero-valent iron is added. Before the base layer begins to set, an HDPE three-dimensional honeycomb grid 21 is embedded, and the HDPE three-dimensional honeycomb grid 21 is filled with zeolite with a particle size of 3-5mm. Then, a 3mm thick elastic bonding layer 3 is sprayed, which is composed of 100 parts epoxy resin, 30 parts polysulfide rubber, The pebbles are pretreated with a vacuum adsorption robot, and the surface is etched with 120-mesh diamond abrasive to etch 80-μm anchor points. Multiple conical grooves 41 are pre-set on the bottom. The pretreated pebbles are embedded in the adhesive layer according to the designed pattern, so that the grooves interlock with the embedded glass fiber nails 5. After being vibrated and leveled at 0.8 MPa, they are cured for 60 seconds using a 365 nm wavelength UV light source with an intensity of 800 mJ / cm2 The structure achieves anti-frost heave, zero shedding and maintenance-free functions through the synergistic effect of the water-conducting grid layer's lateral drainage, microcapsule self-repairing cracks, and fiber nail-groove mechanical interlocking.

[0032] Furthermore, the permeable concrete layer 1 contains sulfur-oxidizing bacteria immobilized particles and nano-zero-valent iron. A gravel blind ditch is set below the permeable concrete layer 1 to provide stable support for the garden pebble paving structure while facilitating water transportation.

[0033] Preferably, the water-conducting grid layer 2 is connected to a photovoltaic-driven capillary water supply system, which includes photovoltaic panels placed at the edge of the paving, a micro-water pump, and microporous water pipes embedded in the gaps between the pebbles. The HDPE three-dimensional honeycomb grid 21 forms a horizontal water channel. The zeolite particles 22 can absorb heavy metal pollutants with an adsorption rate of >92%. Furthermore, the vertical water seepage rate of the permeable concrete layer 1 reaches 5 mm / s, achieving both horizontal and vertical drainage and water purification.

[0034] Preferably, urea-formaldehyde resin microcapsules are dispersed in the elastic bonding layer 3. The core material of the microcapsules contains a silane coupling agent and an epoxy prepolymer, and the mass of the microcapsules accounts for 5-8% of the total weight of the elastic bonding layer 3. When the crack expands, the microcapsules rupture and release the repair agent, completing the self-healing of the crack under the triggering of humidity.

[0035] Preferably, 0.5 wt% boron nitride and shape-memory polymer microspheres are added to the elastic bonding layer 3, with the volume fraction of the microspheres in the elastic bonding layer 3 being 15-20%. When the temperature is above 25°C, the microspheres expand to fill the thermal expansion gap, and when the temperature is below 15°C, they contract to leave room for cold contraction. Furthermore, the carbon nanotubes / boron nitride in the elastic bonding layer 3 create a rapid heat conduction path, eliminating local stress concentrations and significantly improving the freeze-thaw cycle life.

[0036] Preferably, distributed optical fiber sensors and piezoelectric ceramic pieces are embedded in the gaps between the pebbles of the pebble surface layer 4, with a sensor spacing of 200×200 mm, to monitor strain values and falling risks in real time.

[0037] Specifically, a fiberglass nail is embedded in the conical groove 41. The length and diameter of the fiberglass nail are set to 4mm and 0.5mm respectively. The fiberglass nail forms a mechanical interlocking structure with the elastic adhesive layer 3. The fiberglass nail embedded in the conical groove 41 creates an "inverted cone effect," which increases the pullout resistance from the traditional 1.2MPa to 4.5MPa.

[0038] Preferably, the pebble surface of the pebble surface layer 4 is coated with a SiO2 and TiO2 composite sol super hydrophobic coating, and the thickness of the super hydrophobic coating is 0.5-1 μm. The super hydrophobic coating improves the water transport capacity of the pebble surface layer 4 and avoids water accumulation after rain.

[0039] During the construction of the garden pebble paving structure of the present invention, a 150mm graded crushed stone cushion layer and an 80mm permeable concrete base layer are first laid on a plain soil foundation with a compaction degree of ≥93%. The mix ratio is: 42.5R Portland cement: 5-10mm crushed stone: water = 100:180:35, and 1.5wt% nano zero-valent iron is added. Before the base layer initially sets, a HDPE three-dimensional honeycomb grid 21 is embedded, and the HDPE three-dimensional honeycomb grid 21 is filled with zeolite with a particle size of 3-5mm. Then, a 3mm thick elastic adhesive layer 3 is sprayed, which is composed of 100 parts epoxy resin, 30 parts tantalum, and 10 parts tantalum. The pebbles are pretreated by a vacuum adsorption manipulator, and the surface is etched with 120-mesh diamond sand to etch 80 μm anchor points. A plurality of conical grooves 41 are pre-set on the bottom. The pretreated pebbles are embedded in the adhesive layer according to the designed pattern, so that the grooves are interlocked with the embedded glass fiber nails 5. After being vibrated and leveled at 0.8 MPa, they are cured for 60 seconds with a 365 nm wavelength UV light source, and the UV light intensity is 800 mJ / cm 2 The structure achieves anti-frost heave, zero shedding and maintenance-free functions through the synergistic effect of the water-conducting grid layer's lateral drainage, microcapsule self-repairing cracks, and fiber nail-groove mechanical interlocking.

[0040] A method for laying a garden pebble paving structure in another embodiment of the present invention includes the following steps:

[0041] S1. Pebble pretreatment: Use 120 mesh corundum to sandblast and etch the pebble surface, and spray SiO2 and TiO2 composite sol coating;

[0042] S2. Foundation construction: Lay the rammed soil layer, graded crushed stone layer and permeable concrete layer 1 in sequence, and embed the water-conducting grid layer 2 before the permeable concrete begins to set;

[0043] S3. Construction of elastic bonding layer 3: spray elastic adhesive onto the surface of water-conducting grid layer 2, controlling the thickness to 3-5mm;

[0044] S4, mechanical paving: the pebbles are arranged according to a preset pattern by a vacuum adsorption manipulator so that the grooves at the bottom of the pebbles are aligned with the fiberglass nails 5 in the adhesive layer;

[0045] S5. Vibration curing: Use a vibration leveler with an amplitude of 0.8-1.0mm for compaction, and cure with UV light for 30-60 seconds.

[0046] Among them, in S4, when the ambient temperature is less than 5°C, a double-layer embedding process is adopted: the first embedding of the pebbles is 1 / 3 of the depth → UV pre-curing → secondary glue coating → embedding to 2 / 3 of the depth → final curing; when the ambient temperature is greater than 30°C, 0.1wt% retarder is added to the adhesive, and after vibration leveling, it is left to stand for 5 minutes before UV curing.

[0047] The present invention forms mechanical interlocking between surface-etched pebbles and glass fiber nails, combined with the deformation adaptability of the elastic adhesive layer, to completely eliminate the risk of frost heave and falling off; the honeycomb water-conducting grid layer realizes the lateral diversion of rainwater, and the permeable concrete base layer accelerates vertical infiltration to build a water-free paving system; microcapsules autonomously repair cracks, and zeolite filters and purifies rainwater, significantly reducing maintenance costs; mechanized paving and UV light curing technology break through the bottleneck of manual efficiency and ensure the flatness of large-area paving; ultimately achieving a maintenance-free ecological paving effect throughout the entire life cycle.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A garden pebble paving structure, characterized in that: include: The permeable concrete layer has a thickness of 80-120 mm, a compressive strength of ≥15 MPa, and a porosity of 25%-30%; A water-conducting grid layer is laid on top of the permeable concrete layer, the water-conducting grid layer comprising a HDPE three-dimensional honeycomb grid filled with zeolite particles, the height of the HDPE three-dimensional honeycomb grid being set to 20±2 mm, and the particle size of the zeolite particles being 3-5 mm; An elastic bonding layer is laid on top of the water-conducting grid layer. The thickness of the elastic bonding layer is 3-5 mm. The elastic bonding layer is composed of 100 parts of epoxy resin, 30 parts of modified polysulfide rubber, 150 parts of quartz sand, 25 parts of curing agent T31 and 0.3 wt% of carbon nanotubes. The pebble surface layer is laid on the elastic bonding layer. The pebble surface layer is composed of pebble particles with a particle size of 20-50. The surface of the elastic bonding layer is sandblasted and etched to form an anchor point structure with a depth of 80±10μm, and a plurality of conical grooves are pre-set at the bottom of the pebble surface layer.

2. A garden pebble paving structure according to claim 1, characterized in that: The permeable concrete layer contains sulfur-oxidizing bacteria immobilized particles and nano-zero-valent iron, and a gravel blind ditch is arranged below the permeable concrete layer.

3. A garden pebble paving structure according to claim 1, characterized in that: The water-conducting grid layer is connected to a photovoltaic-driven capillary water supply system, which includes a photovoltaic panel laid on the edge of the paving, a micro water pump, and a microporous water supply pipe embedded in the gaps between pebbles.

4. A garden pebble paving structure according to claim 1, characterized in that: Urea-formaldehyde resin microcapsules are dispersed in the elastic bonding layer. The core material of the microcapsules contains a silane coupling agent and an epoxy prepolymer. The mass of the microcapsules accounts for 5-8% of the total weight of the elastic bonding layer.

5. A garden pebble paving structure according to claim 4, characterized in that: 0.5 wt% of boron nitride and shape memory polymer microspheres are added to the elastic bonding layer, and the volume fraction of the microspheres in the elastic bonding layer is 15-20%.

6. The garden pebble paving structure according to claim 1, characterized in that: Distributed optical fiber sensors and piezoelectric ceramic pieces are embedded in the gaps between the pebbles of the pebble surface layer, and the sensor spacing is 200×200 mm.

7. A garden pebble paving structure according to claim 6, characterized in that: A glass fiber nail is embedded in the conical groove. The length and diameter of the glass fiber nail are set to 4 mm and 0.5 mm respectively. The glass fiber nail forms a mechanical interlocking structure with the elastic bonding layer.

8. The garden pebble paving structure according to claim 7, characterized in that: The pebble surface of the pebble surface layer is coated with a SiO2 and TiO2 composite sol super-hydrophobic coating, and the thickness of the super-hydrophobic coating is 0.5-1 μm.

9. A method for laying a garden pebble paving structure, used for a garden pebble paving structure as claimed in claims 1 to 8, characterized in that: The steps include: S1. Pebble pretreatment: Use 120 mesh corundum to sandblast and etch the pebble surface, and spray SiO2 and TiO2 composite sol coating; S2. Foundation construction: Lay the rammed earth layer, graded crushed stone layer, and permeable concrete layer in sequence, and embed the water-conducting grid layer before the permeable concrete begins to set; S3. Elastic bonding layer construction: spray elastic adhesive to the surface of the water-conducting grid layer, controlling the thickness to 3-5mm; S4, mechanical paving: The pebbles are arranged in a preset pattern using a vacuum adsorption robot so that the grooves at the bottom of the pebbles are aligned with the fiberglass nails in the adhesive layer; S5. Vibration curing: Use a vibration leveler with an amplitude of 0.8-1.0mm for compaction, and cure with UV light for 30-60 seconds.

10. The method for laying a garden pebble paving structure according to claim 9, characterized in that: In S4, when the ambient temperature is less than 5°C, a double-layer embedding process is used: First embedding into the pebble 1 / 3 depth → UV pre-curing → secondary glue application → embedding to 2 / 3 depth → final curing; When the ambient temperature is greater than 30°C, add 0.1wt% retarder to the adhesive, vibrate and level it, let it stand for 5 minutes, and then perform UV curing.

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