Protective structure for protecting surrounding landscape of ancient tree

Abstract

The utility model discloses a kind of protection structures for protecting ancient tree peripheral landscape, the protection structure includes sunken space, several retaining wall protection structures, backfill, protective rail, several retaining wall protection structures are sequentially spaced along the sunken space edge from low to high, protective rail is fixed in the top of retaining wall protection structure located in the uppermost side of sunken space, backfill is filled in the outer periphery of the uppermost retaining wall protection structure.The protection structure of the utility model provides installation base for several retaining wall protection structures by sunken space and creates landscape level, backfill is filled in the outer periphery of retaining wall protection structure, the bottom of protective rail is fixed with the top of retaining wall protection structure, and the security of sunken space protection can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ancient tree protection and landscape construction engineering, specifically to a protective structure for the protection of the landscape surrounding ancient trees. Background Technology

[0002] Ancient and famous trees are hailed as "living cultural relics" and are an important part of the ecosystem. Their extensive root systems and canopies help conserve water and soil, regulate climate, provide habitats for organisms, and maintain ecological balance. Protecting ancient trees and optimizing their surrounding environment can enhance the stability and resilience of the ecosystem.

[0003] In ancient tree protection and landscape renovation projects, a common problem is the significant elevation difference between the finished surface of the site surrounding the protected ancient tree and the existing topography (the existing topography is approximately 13.3 meters, while the designed finished surface elevation of the surrounding landscape is 17 meters, a difference of 3.7 meters). Traditional methods of ancient tree protection primarily involve transplantation, but this approach has several shortcomings:

[0004] 1) Before transplanting, the ancient tree must be pruned and the tree ball dug out, which causes great damage to the trunk of the ancient tree;

[0005] 2) The loading, transportation, and planting processes during transplantation take a long time, and the trees are prone to dehydration and death.

[0006] 3) After transplantation, the growth environment and climate change;

[0007] 4) From pre-transplant application to post-transplant care, the process is lengthy, costly, and carries a high risk of death. Utility Model Content

[0008] In order to solve the problems mentioned in the background art, the present invention provides a protective structure that can solve the problem of ground elevation difference around ancient trees and has both landscape layering and structural stability.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A protective structure for protecting the landscape around an ancient tree includes a sunken space, several retaining wall structures, backfill soil, and guardrails. The retaining wall structures are distributed at intervals from low to high along the edge of the sunken space. The guardrails are fixed to the top of the uppermost retaining wall structure in the sunken space, and the backfill soil is used to fill the outer perimeter of the uppermost retaining wall structure.

[0011] Furthermore, the retaining wall protection structure at the uppermost side of the sunken space includes, vertically from top to bottom, a reinforced concrete wall, a concrete cushion layer, and a sand and gravel cushion layer. The concrete cushion layer is laid below the reinforced concrete wall, and the sand and gravel cushion layer is laid below the concrete cushion layer. The bottom of the guardrail is fixed to the top of the reinforced concrete wall, and the backfill soil is filled around the outer perimeter of the reinforced concrete wall.

[0012] Furthermore, the cross-section of the reinforced concrete wall is inclined, and the inclination slope of the reinforced concrete wall is 1:0.1 to 1:0.3.

[0013] Furthermore, the interior of the reinforced concrete wall is bound with a steel reinforcement cage, which includes longitudinal reinforcing bars and transverse reinforcing bars. The longitudinal reinforcing bars are arranged parallel to each other along the height direction of the reinforced concrete wall and are located on the side close to the backfill soil. The transverse reinforcing bars are arranged parallel to each other along the length direction of the reinforced concrete wall and are fixedly connected to the longitudinal reinforcing bars.

[0014] Furthermore, the backfill soil is filled on the side of the reinforced concrete wall away from the sunken space, and the thickness of the backfill soil is 15m.

[0015] Furthermore, the concrete cushion layer is a C20 concrete cushion layer.

[0016] Furthermore, the thickness of the sand and gravel cushion layer is 250 mm.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1) The protective structure of this utility model includes a sunken space, several retaining wall structures, backfill soil, and guardrails. The retaining wall structures are distributed sequentially from low to high along the edge of the sunken space. The guardrails are fixed to the top of the uppermost retaining wall structure in the sunken space. Backfill soil is used to fill the outer perimeter of the uppermost retaining wall structure. This utility model's protective structure provides an installation foundation for the retaining wall structures through the sunken space and creates a sense of landscape layering. The backfill soil filling around the retaining wall structures and the fixing of the bottom of the guardrails to the top of the retaining wall structures improves the safety of the sunken space protection.

[0019] 2) The retaining wall protection structure of this utility model includes a reinforced concrete wall body, a concrete cushion layer, and a sand and gravel cushion layer arranged vertically from top to bottom. The reinforced concrete wall body bears the lateral pressure of the soil behind the wall, and the concrete cushion layer is fixed below the reinforced concrete wall body. It can serve as a transition layer between the reinforced concrete wall body and the foundation, and is used to disperse the load of the reinforced concrete wall body and avoid stress concentration in the foundation. Attached Figure Description

[0020] Figure 1 This is a plan view of the protective device of this utility model installed in the landscape surrounding the ancient tree;

[0021] Figure 2 This is a utility model Figure 1 Detailed diagram of the retaining wall structure and backfill soil in Part A;

[0022] Figure 3 This is a utility model Figure 1 Detailed drawing of the guardrail and reinforced concrete wall in Part B.

[0023] In the diagram: 1. Sunken space; 2. Retaining wall protection structure; 21. Reinforced concrete wall body; 211. Reinforcing steel frame; 2111. Longitudinal reinforcing steel; 2111. Transverse reinforcing steel; 2112. Concrete cushion layer; 22. Sand and gravel cushion layer; 23. Backfill soil; 3. Guardrail; 4. Ancient tree; 5. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-3 As shown in Embodiment 1 of this utility model, a protective structure for the protection of the landscape surrounding an ancient tree 5 is provided. This protective structure includes a sunken space 1, several retaining wall structures 2, backfill soil 3, and guardrails 4. The retaining wall structures 2 are distributed sequentially from low to high along the edge of the sunken space 1. The guardrails 4 are fixed to the top of the uppermost retaining wall structure 2 in the sunken space 1. The backfill soil 3 fills the outer perimeter of the uppermost retaining wall structure 2. This utility model's protective structure provides an installation foundation for the retaining wall structures 2 through the sunken space 1 and creates a sense of landscape layering. The backfill soil 3 filling the outer perimeter of the retaining wall structures 2 and fixing the bottom of the guardrails 4 to the top of the retaining wall structures 2 improves the safety of the sunken space 1. The guardrails 4 also work synergistically with the retaining wall structures 2 to optimize the visual effect of the landscape. The protective structure of this utility model adopts an on-site protection method, which not only maintains the current lush and beautiful shape of the ancient tree 5, but also solves the problems of slope collapse and maintenance faced by the ancient tree 5 in the landscape space with large elevation differences.

[0026] In this embodiment of the utility model, the sunken space 1 is a 600-square-meter sunken area around the ancient tree 5. The sunken area forms a 3.7-meter height difference with the completed landscape design surface around the ancient tree 5, providing an installation foundation for the retaining wall protection structure 2 and creating a sense of landscape layering. It can also solve the problem of a height difference of about 3.7 meters between the current ground of the ancient tree 5 and the completed landscape design surface around it.

[0027] In practice, the protective railing 4 of this utility model is connected to the reinforced concrete wall 21 by welding or bolting with embedded parts.

[0028] This invention involves filling the reinforced concrete wall 21 with backfill soil 3 on the side facing away from the sunken space 1, with a thickness of 15m. The backfill soil 3 is plain soil or lime-soil with a compaction degree ≥93%. The backfill soil 3 can form a drainage path in conjunction with the sand and gravel cushion layer 23, and balance the soil pressure in front of and behind the wall. The overall structure is economical and practical, and is suitable for the protection of ancient trees 5.

[0029] The retaining wall protection structure 2 at the top of the sunken space 1 includes, vertically from top to bottom, a reinforced concrete wall 21, a concrete cushion layer 22, and a sand and gravel cushion layer 23. The concrete cushion layer 22 is laid below the reinforced concrete wall 21, and the sand and gravel cushion layer 23 is laid below the concrete cushion layer 22. The bottom of the guardrail 4 is fixed to the top of the reinforced concrete wall 21, and the backfill soil 3 fills the outer perimeter of the reinforced concrete wall 21. The retaining wall protection structure 2 of this utility model uses the reinforced concrete wall 21 to bear the lateral pressure of the soil behind the wall. The concrete cushion layer 22, fixed below the reinforced concrete wall 21, can serve as a transition layer between the reinforced concrete wall 21 and the foundation, dispersing the load of the reinforced concrete wall 21 and preventing stress concentration in the foundation. The sand and gravel cushion layer 23, laid below the concrete cushion layer 22, is permeable, providing drainage, improving the bearing capacity of the foundation, reducing uneven settlement, and further diffusing the load.

[0030] In this embodiment, the concrete cushion layer 22 is a C20 concrete cushion layer 22, and the sand and gravel cushion layer 23 has a thickness of 250mm. The sand and gravel cushion layer 23 provided in this utility model is filled with sand and gravel with a particle size of 5-30mm. The sand and gravel has good water permeability. The sand and gravel cushion layer 23 serves as the bottom support structure of the retaining wall protection structure 2, and has good water permeability and load-bearing capacity. It effectively removes water accumulation behind the retaining wall protection structure 2, reduces the impact of water pressure on the retaining wall protection structure 2, and can also disperse the vertical load transmitted by the retaining wall protection structure 2 and the backfill soil 3, avoiding local settlement of the foundation due to load concentration. It also provides a flat and solid construction foundation for the concrete cushion layer 22 above.

[0031] In this embodiment of the invention, the cross-section of the reinforced concrete wall 21 is inclined, with a slope of 1:0.1 to 1:0.3. The slope design (slope 1:0.2) of the reinforced concrete wall 21 reduces earth pressure, improves anti-slip and anti-overturning stability, and reduces material usage.

[0032] This utility model has a steel reinforcement cage 211 tied inside the reinforced concrete wall 21. The steel reinforcement cage 211 includes longitudinal reinforcing bars 2111 and transverse reinforcing bars 2112. The longitudinal reinforcing bars 2111 are arranged parallel to each other along the height direction of the reinforced concrete wall 21 and are located on the side close to the backfill soil 3. The transverse reinforcing bars 2112 are arranged parallel to each other along the length direction of the reinforced concrete wall 21 and are fixedly connected to the longitudinal reinforcing bars 2111. The longitudinal reinforcing bars 2111 of this utility model are HRB400E steel bars with a diameter of 20mm and a spacing of 100mm (20@100). The transverse reinforcing bars 2112 are HRB400E steel bars with a diameter of 14mm and a spacing of 200mm. The longitudinal reinforcing bars 2111 and the transverse reinforcing bars 2112 are fixedly connected by binding or welding. The longitudinal reinforcing bars 2111 mainly bear the bending moment and shear force generated by the retaining wall due to the lateral pressure of the backfill soil, enhance the crack resistance and bearing capacity of the retaining wall protection structure 2, and prevent the retaining wall protection structure 2 from bending or shearing failure under the action of soil pressure. The transverse reinforcing bars 2112 can fix the position of the main longitudinal reinforcing bars 2111 to ensure the integrity of the reinforcing bar skeleton 211. On the other hand, they can evenly distribute the local load transmitted by the backfill soil 3 to the main longitudinal reinforcing bars 2111, reducing the cracks in the concrete of the retaining wall protection structure 2 caused by temperature changes or shrinkage. This utility model can enhance the bending and shear resistance of the reinforced concrete wall 21 by setting a steel reinforcement cage 211, prevent concrete cracking, and enhance the durability of the retaining wall protection structure 2.

[0033] The installation and construction process of the protective structure of this utility model is as follows:

[0034] Step 1) Site pretreatment: Measure and mark out the area around ancient tree 5, delineate a 600-square-meter sunken space 1, and clear surface debris from the area to ensure that the root system of ancient tree 5 is not disturbed;

[0035] Step 2) Construction of the sand and gravel cushion layer 23: At the installation position of the retaining wall protection structure 2 at the edge of the sunken space 1, excavate the foundation pit to the design elevation, lay a 250mm thick layer of sand and gravel (particle size 5-30mm), and use a vibratory roller to compact it in layers, with a compaction degree ≥95%, to form the foundation bearing layer;

[0036] Step 3) Construction of concrete cushion layer 22: Pour C20 concrete cushion layer 22 on top of sand and gravel cushion layer 23, with a thickness as required by the design (100-150mm in the example). Cover and cure for 7 days after pouring to ensure that the strength meets the standard.

[0037] Step 4) Construction of reinforced concrete wall 21: Erect wall formwork at a slope of 1:0.2 and tie the reinforcing steel cage 211: Longitudinal reinforcing steel 2111 uses HRB400E steel bars with a diameter of 20mm, arranged at 100mm intervals; transverse reinforcing steel 2112 uses HRB400E steel bars with a diameter of 14mm, arranged at 200mm intervals; pour concrete (strength grade ≥ C30), use a vibrator to compact it, avoid honeycomb and pitting, and cover and moisturize for 14 days after pouring;

[0038] Step 5) Backfill 3 construction: After the concrete strength of the reinforced concrete wall 21 reaches 80% of the design value, backfill soil 3 (preferably plain soil or lime soil) in layers on the reinforced concrete wall 21, with each layer being 300mm thick. Use a small rammer to compact the soil, with a compaction degree ≥93%, until the backfill reaches the design elevation of 15.000m.

[0039] Step 6) Installation of guardrail 4: Pre-embedded parts are reserved at the top of the reinforced concrete wall 21. The bottom of the guardrail 4 is welded or bolted to the pre-embedded parts to ensure the verticality and stability of the guardrail 4, and the assembly of the protective structure is completed.

[0040] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A protective structure for the protection of the landscape surrounding ancient trees, characterized in that: The protective structure includes a sunken space, several retaining wall structures, backfill soil, and guardrails. The retaining wall structures are distributed at intervals from low to high along the edge of the sunken space. The guardrails are fixed to the top of the retaining wall structure located at the uppermost side of the sunken space. The backfill soil fills the outer perimeter of the uppermost retaining wall structure.

2. The protective structure for protecting the surrounding landscape of an old tree according to claim 1, characterized in that: The retaining wall protection structure at the uppermost side of the sunken space includes, vertically from top to bottom, a reinforced concrete wall, a concrete cushion layer, and a sand and gravel cushion layer. The concrete cushion layer is laid below the reinforced concrete wall, and the sand and gravel cushion layer is laid below the concrete cushion layer. The bottom of the guardrail is fixed to the top of the reinforced concrete wall, and the backfill soil is filled around the outer perimeter of the reinforced concrete wall.

3. The protective structure for protecting the surrounding landscape of an old tree according to claim 2, characterized in that: The reinforced concrete wall has an inclined cross-section with a slope of 1:0.1 to 1:0.

3.

4. The protective structure for protecting the landscape surrounding ancient trees according to claim 2, characterized in that: The interior of the reinforced concrete wall is bound with a steel reinforcement cage, which includes longitudinal reinforcing bars and transverse reinforcing bars. The longitudinal reinforcing bars are arranged parallel to each other along the height of the reinforced concrete wall and are located on the side close to the backfill soil. The transverse reinforcing bars are arranged parallel to each other along the length of the reinforced concrete wall and are fixedly connected to the longitudinal reinforcing bars.

5. The protective structure for protecting the surrounding landscape of an old tree according to claim 1, characterized in that: The backfill soil is filled on the side of the reinforced concrete wall away from the sunken space, and the thickness of the backfill soil is 15m.

6. The protective structure for protecting the landscape surrounding ancient trees according to claim 2, characterized in that: The concrete cushion layer is a C20 concrete cushion layer.

7. The protective structure for protecting the landscape surrounding ancient trees according to claim 2, characterized in that: The thickness of the sand and gravel cushion layer is 250 mm.

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