Mangrove forest extreme wave protection structure and optimization method

Abstract

The invention particularly relates to a mangrove forest extreme wave protection structure and an optimization method, and belongs to the technical field of mangrove forest protection. The mangrove forest extreme wave protection structure comprises a protection net and protection piles. The protection piles are arranged on the two sides of the protection net in the length direction, each protection pile comprises a pile body and a plurality of buffering assemblies, the pile bodies are inserted underground, the multiple buffering assemblies are vertically and sequentially connected, the bottommost buffering assembly is connected to the tops of the pile bodies, each buffering assembly comprises a base, a movable part and a connecting part, and each base is provided with a containing cavity. An opening communicated with the containing cavity is formed in the bottom of the base body, the movable part is contained in the containing cavity and is in clearance fit with the containing cavity, an elastic piece is arranged between the outer wall of the movable part and the inner wall of the containing cavity, and the connecting part is connected between the movable part and every two adjacent buffering assemblies through the opening. The connecting part of the upper buffering assembly is connected to the base body of the lower buffering assembly, the connecting part of the bottommost buffering assembly is connected to the top of the pile body, and the protective net is connected to all the base bodies.

Description

Technical Field

[0001] The invention belongs to the technical field of mangrove protection, and in particular relates to a mangrove extreme wave protection structure. Background Art

[0002] Mangroves are salt-tolerant evergreen woody communities dominated by mangrove plants that grow in the intertidal zones of subtropical and tropical regions. Mangroves can not only stabilize water and soil and effectively curb coastal erosion, but also reduce the damage of waves to coastal engineering structures and urban production and living facilities when tsunamis strike. Therefore, mangroves are an important ecosystem in coastal cities in southern my country. They not only have huge carbon sink capacity and ecological benefits, but also provide multi-faceted protection for the coastal environment. During their growth, mangroves are affected by complex marine environments, especially under extreme sea conditions, when mangroves are vulnerable to the impact of violent ocean waves. Under extreme sea conditions, the wave field is more complex, the wave height is larger, and the nonlinearity is stronger. When interacting with mangroves, the huge energy contained in extreme waves produces a large load on mangroves, which may cause damage to mangrove vegetation and ecosystems, seriously threatening the survival and safety of mangroves. Therefore, how to increase the protective effect of mangroves during extreme waves is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a mangrove extreme wave protection structure and an optimization method, through which the protection effect on mangroves can be increased.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: on the one hand, the embodiment of the present application provides a mangrove extreme wave protection structure, including a protection net and a protection pile. The protection pile is arranged on both sides of the length direction of the protection net, and the protection pile includes a pile body and a plurality of buffer components. The pile body is inserted into the ground, and the plurality of buffer components are vertically connected in sequence. The bottom buffer component is connected to the top of the pile body. The buffer component includes a seat body, a movable part and a connecting part. The seat body is provided with a receiving cavity, and the bottom of the seat body is provided with an opening connected to the receiving cavity. The movable part is accommodated in the receiving cavity, and the movable part and the receiving cavity are gap-matched. An elastic part is arranged between the outer wall of the movable part and the inner wall of the receiving cavity. The connecting part is connected to the movable part via the opening. Between two adjacent buffer components, the connecting part of the upper buffer component is connected to the seat body of the lower buffer component, and the connecting part of the bottom buffer component is connected to the top of the pile body. The side edges in the width direction of the protection net are connected to each seat body.

[0005] In some embodiments, the connecting portion includes two struts, which are rotatably connected in the middle parts. Along the length direction of the struts, the struts include a first side and a second side, and the first side is arranged in the accommodating cavity via an opening. The movable portion includes two first arc-shaped shells, and the concave sides of the two first arc-shaped shells are arranged opposite to each other. The concave sides of the two first arc-shaped shells are respectively connected to the first sides of the two struts. Between two adjacent buffer assemblies, the second side of the strut of the upper buffer assembly is connected to the seat body of the lower buffer assembly, and the second side of the strut of the bottom buffer assembly is connected to the pile body.

[0006] In some embodiments, the buffer assembly further includes two second arcuate shells corresponding to the two first arcuate shells, the concave sides of the second arcuate shells face the convex sides of the first arcuate shells, and the elastic member connects the first arcuate shells and the second arcuate shells.

[0007] In some embodiments, the side wall surface of the accommodating cavity is a curved surface that matches the second curved shell.

[0008] In some embodiments, the elastic member is a spring, and a plurality of the elastic members are provided, and the axes of the plurality of elastic members extend along the radial direction of the first arc-shaped shell.

[0009] In some embodiments, a winding roller is rotatably provided on the support rod, a first arc-shaped shell provided on the support rod is provided with a threading hole, a connecting rope is wound on the winding roller, and the connecting rope is connected to the second arc-shaped shell via the threading hole, and the winding roller is provided with a toggle portion, and the toggle portion is configured so that when the first sides of the two support rods are closed, one of the support rods toggle the toggle portion of the other support rod to make the winding roller reel in the connecting rope.

[0010] In some embodiments, two first limiting cavities are arranged at intervals on the pile body, and entrances are arranged on opposite sides of the two first limiting cavities; two second limiting cavities are arranged at intervals on the seat body, and entrances are arranged on opposite sides of the two second limiting cavities; protrusions are arranged on opposite sides of the two second sides of the two support rods; the two first limiting cavities and the two second limiting cavities are used to accommodate the protrusions of the corresponding support rods.

[0011] In some embodiments, between two adjacent buffer assemblies, the lower seat body is movably provided with a supporting portion along the vertical direction, and the buffer assembly corresponding to the bottom of the pile body is movably provided with a supporting portion, which is used to abut between the corresponding two support rods to separate the second sides of the two support rods.

[0012] In some embodiments, the protective net is made of elastic material.

[0013] On the other hand, the embodiment of the present application also provides a method for optimizing a mangrove extreme wave protection structure, comprising the following steps:

[0014] A gridless SPH-FEA coupled numerical model of the interaction between extreme waves and mangroves was established.

[0015] Based on the numerical model, the influence of wave parameters, tidal flat topography and plant parameters on the wave surface, flow velocity, pressure, vorticity, and the force and deformation response of trees near mangroves are calculated and analyzed.

[0016] The interaction between extreme waves and mangroves protected by protective structures of different structural forms, sizes and arrangements is simulated.

[0017] Based on the numerical model, the influence of protective structure form, structure size and structure layout on mangrove flow velocity, wave surface, vorticity and pressure field as well as plant wave load and deformation response is studied.

[0018] The present invention has the following beneficial effects:

[0019] 1. When the protective net is impacted by waves, the waves drive the seat to move. Under the action of the elastic member, the torque on the protective net can be buffered, reducing the risk of damage to the protective net. Multiple buffer components are arranged from top to bottom, so that according to the magnitude of the wave impact force, from bottom to top, the offset distance of the seat of each buffer component relative to the pile body gradually increases, increasing the buffer range while allowing the protective net to be in an inclined state, thereby increasing the protective effect of the protective net and further reducing the risk of damage to the protective net.

[0020] 2. Due to the strong nonlinear characteristics of waves in the interaction between extreme waves and mangroves, and the influence of mangrove plant flexibility needs to be considered, the flow field and force of wave-plant interaction are relatively complex, and there is a certain error between the calculation results and the actual situation. In addition, the physical model test consumes a lot of resources, has a high investment, and is prone to environmental pollution. Based on the SPH and FEA methods, an SPH-FEA coupling model of extreme wave-mangrove interaction that can consider wave nonlinearity and plant flexibility is established, which not only makes up for the shortcomings of traditional physical experiments, but also improves the calculation accuracy. Extreme waves contain huge energy and have strong nonlinearity, which will produce large wave loads on mangroves. Excessive wave loads will also affect the deformation response of mangroves. For example, excessive deformation amplitude will cause the branches or trunks of mangroves to break and be destroyed, which directly threatens the safety of mangroves. This method takes into account the nonlinear wave conditions and the influencing factors of plant flexibility, and analyzes the influence of wave parameters, plant parameters and tidal flat topography on the flow velocity, wave surface, vorticity and pressure field of the interaction between extreme waves and mangroves, as well as the wave load and deformation response of mangroves. Furthermore, this method can provide a basis for the optimization of protective structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the exploded structure of the mangrove extreme wave protection structure of the present invention;

[0022] Figure 2It is a structural schematic diagram of the connecting portion of the present invention;

[0023] Figure 3 for Figure 1 Enlarged view of point A.

[0024] Figure numbers: 1-pile body, 2-buffer assembly, 3-protective net, 4-support rod, 5-second arc-shaped shell, 6-first arc-shaped shell, 7-protrusion, 8-winding roller, 9-connecting rope, 10-moving part, 11-resting part, 12-first limiting cavity, 13-second limiting cavity, 14-seat body. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] On the one hand, the embodiment of the present application provides a mangrove extreme wave protection structure, including a protection net 3 and a protection pile. The protection pile is arranged on both sides of the length direction of the protection net 3, and the protection pile includes a pile body 1 and a plurality of buffer components 2. The pile body 1 is inserted into the ground, and the plurality of buffer components 2 are vertically connected in sequence. The bottom buffer component 2 is connected to the top of the pile body 1. The buffer component 2 includes a seat body 14, a movable part and a connecting part. The seat body 14 is provided with a receiving cavity, and the bottom of the seat body 14 is provided with an opening connected to the receiving cavity. The movable part is accommodated in the receiving cavity, and the movable part and the receiving cavity are gap-matched. An elastic member is arranged between the outer wall of the movable part and the inner wall of the receiving cavity, and the connecting part is connected to the movable part via the opening. Between two adjacent buffer components 2, the connecting part of the upper buffer component 2 is connected to the seat body 14 of the lower buffer component 2, and the connecting part of the bottom buffer component 2 is connected to the top of the pile body 1. The side of the width direction of the protection net 3 is connected to each seat body 14.

[0028] The protection net 3 is used to protect the mangroves, that is, when extreme waves flow toward the mangroves, the waves are blocked and buffered by the protection net 3, thereby reducing the risk of the mangroves being destroyed by the impact of the waves.

[0029] The protection piles support the protection net 3 so that the protection net 3 can be stretched out.

[0030] The pile body 1 is inserted into the ground so that the position of the protective pile can be fixed. The fixing method of the pile body 1 can be selected from existing methods, which will not be described here.

[0031] The plurality of buffer components 2 form a vertically extending rod-like structure, and the protection net 3 is connected to the base body 14 of each buffer component 2, so that the protection net 3 can be vertically stretched.

[0032] The movable part and the accommodating cavity are clearance-matched, so that the position of the movable part relative to the accommodating cavity can be adjusted within a certain range.

[0033] When the movable portion moves relative to the accommodating cavity, the elastic member can be compressed, so that the elastic member can generate an elastic restoring force.

[0034] On the one hand, the elastic member plays a role in buffering the torque applied to the buffer assembly 2 , and on the other hand, the elastic member plays a role in resetting the buffer assembly 2 .

[0035] The connection method between the protective net 3 and the seat body 14 can be selected from existing methods, which will not be described here.

[0036] When the protection net 3 is impacted by waves, the waves drive the seat body 14 to move. Under the action of the elastic member, the torque applied to the protection net 3 can be buffered, thereby reducing the risk of damage to the protection net 3.

[0037] Multiple buffer components 2 are arranged from top to bottom, so that according to the magnitude of the wave impact force, from bottom to top, the offset distance of the seat 14 of each buffer component 2 relative to the pile body 1 gradually increases, thereby increasing the buffer range and allowing the protective net 3 to be in an inclined state, thereby increasing the protective effect of the protective net 3 and further reducing the risk of damage to the protective net 3.

[0038] In some embodiments, the connecting portion includes two struts 4, which are rotatably connected in the middle parts. Along the length direction of the struts 4, the struts 4 include a first side and a second side, and the first side is arranged in the accommodating cavity via an opening. The movable portion includes two first arc-shaped shells 6, and the concave sides of the two first arc-shaped shells 6 are arranged opposite to each other. The concave sides of the two first arc-shaped shells 6 are respectively connected to the first sides of the two struts 4. Between two adjacent buffer assemblies 2, the second side of the strut 4 of the upper buffer assembly 2 is connected to the seat body 14 of the lower buffer assembly 2, and the second side of the strut 4 of the bottom buffer assembly 2 is connected to the pile body 1.

[0039] The two struts 4 are rotatably connected in the middle, so that the two struts 4 can rotate relative to each other, so that the two struts 4 can have two states, one is that the first sides of the two struts 4 are closed, and the other is that the second sides of the two struts 4 are separated.

[0040] When the first sides of the two struts 4 are closed, the distance between the two first arc-shaped shells 6 is reduced, so that the movable part can be taken out from the accommodating cavity. Conversely, when the first sides of the two struts 4 are separated, the distance between the two first arc-shaped shells 6 is increased, and the movable part cannot be taken out from the accommodating cavity.

[0041] Under the action of the two support rods 4, the movable part can be detachably connected to the seat body 14, and when a certain buffer component 2 is damaged, it can be replaced.

[0042] The first arc-shaped shell 6 is an arc-shaped structure, and the inner concave sides of the two first arc-shaped shells 6 are arranged relatively to each other, so that the two first arc-shaped shells 6 can form an approximately circular ring-shaped structure, and the outer peripheral wall of the circular ring-shaped structure is an outer convex arc surface. This arrangement increases the position range in which the elastic member can contact the movable part, thereby allowing the movable part to move relative to the accommodating cavity within a horizontal range of 360 degrees, thereby increasing the buffering effect of the buffer assembly 2.

[0043] In some embodiments, the buffer assembly 2 further includes two second arcuate shells 5 corresponding to the two first arcuate shells 6 , the concave side of the second arcuate shell 5 faces the convex side of the first arcuate shell 6 , and an elastic member connects the first arcuate shell 6 and the second arcuate shell 5 .

[0044] The elastic member is disposed between the first arc-shaped shell 6 and the second arc-shaped shell 5 . When the second arc-shaped shell 5 abuts against the inner wall of the accommodating cavity, the first arc-shaped shell 6 can float relative to the second arc-shaped shell 5 .

[0045] On the one hand, this structure enables the elastic member, the first arc-shaped shell 6 and the second arc-shaped shell 5 to be taken out from the accommodating chamber when the first sides of the two struts 4 are closed, so that the first arc-shaped shell 6, the second arc-shaped shell 5 and the elastic member can be easily maintained. On the other hand, the first arc-shaped shell 6 and the second arc-shaped shell 5 cooperate to enable the first arc-shaped shell 6 to swing relative to the second arc-shaped shell 5, and the second arc-shaped shell 5 can be abutted against the inner wall of the accommodating chamber, thereby reducing the processing accuracy requirements for the accommodating chamber. On the other hand, the concave side of the second arc-shaped shell 5 faces the convex side of the first arc-shaped shell 6, so that the second arc-shaped shell 5 can limit the vertical displacement of the first arc-shaped shell 6, thereby reducing the risk of large vertical swings of the first arc-shaped shell 6, thereby causing the pile body 1 to loosen.

[0046] In the embodiment of the present application, when the first arc-shaped shell 6 and the second arc-shaped shell 5 are accommodated in the accommodation cavity, the second arc-shaped shell 5 can abut against the inner wall of the opening of the accommodation cavity and the inner wall of the accommodation cavity facing the opening. The first arc-shaped shell 6 can also abut against the inner wall of the accommodation cavity facing the opening to reduce the risk of large displacement of the first arc-shaped shell 6 in the vertical direction.

[0047] In the embodiment of the present application, the size of the opening can be appropriately set according to the rotation angle of the two support rods 4, the sizes of the first arc-shaped shell 6 and the second arc-shaped shell 5, so that the movable part will not fall out of the accommodating cavity when in working state, and the movable part can be taken out from the opening when disassembling.

[0048] In an embodiment of the present application, a limiting structure can be set between the second arc-shaped shell 5 and the inner wall of the accommodating cavity, so that when the second arc-shaped shell 5 is against the inner wall of the accommodating cavity, the second arc-shaped shell 5 cannot rotate relative to the inner wall of the accommodating cavity, and the limiting structure can be selected from the existing structures.

[0049] In some embodiments, the side wall surface of the accommodating cavity is a curved surface matched with the second curved shell 5 .

[0050] The side wall surface of the accommodating cavity is an arc surface adapted to the second arc-shaped shell 5 , so that the outer peripheral wall of the second arc-shaped shell 5 can fit closely with the inner peripheral wall of the accommodating cavity, thereby improving the supporting effect of the second arc-shaped shell 5 .

[0051] In some embodiments, the elastic member is a spring, and a plurality of the elastic members are provided, and the axes of the plurality of elastic members extend along the radial direction of the first arc-shaped shell 6 .

[0052] The axis of the elastic member is the direction in which the spring spiral extends.

[0053] There are multiple elastic members, and the axis of the elastic members extends radially along the first arc-shaped shell 6, so that when the first arc-shaped shell 6 moves relative to the second arc-shaped shell 5, the elastic members along the radial direction of the first arc-shaped shell 6 can be fully compressed, thereby increasing the resetting effect of the first arc-shaped shell 6.

[0054] In some embodiments, the support rod 4 is rotatably provided with a winding roller 8, the first arc-shaped shell 6 provided on the support rod 4 is provided with a threading hole, the winding roller 8 is wound with a connecting rope 9, the connecting rope 9 is connected to the second arc-shaped shell 5 via the threading hole, and the winding roller 8 is provided with a toggle portion 10. The toggle portion 10 is configured so that when the first sides of the two support rods 4 are closed, one of the support rods 4 toggle the toggle portion 10 of the other support rod 4 so that the winding roller 8 reels the connecting rope 9.

[0055] When the first sides of the two support rods 4 are closed, the other support rod 4 pushes the toggle portion 10, causing the winding roller 8 to rotate, and the winding roller 8 reels the connecting rope 9, so that the second arc-shaped shell 5 can be close to the first arc-shaped shell 6, which is convenient for taking the first arc-shaped shell 6 and the second arc-shaped shell 5 out of the accommodating cavity. At the same time, the connecting rope 9 also plays a role in limiting the maximum displacement of the first arc-shaped shell 6 relative to the second arc-shaped shell 5.

[0056] In the embodiment of the present application, a torsion spring can be arranged between the winding roller 8 and the support rod 4, so that when the first arc-shaped shell 6 moves relative to the second arc-shaped shell 5, the connecting rope 9 can be released, and after the first arc-shaped shell 6 is reset, the winding roller 8 can reel in the connecting rope 9.

[0057] In some embodiments, the pile body 1 is provided with two first limiting cavities 12 at intervals, and entrances are provided on opposite sides of the two first limiting cavities 12; the seat body 14 is provided with two second limiting cavities 13 at intervals, and entrances are provided on opposite sides of the two second limiting cavities 13; protrusions 7 are provided on opposite sides of the two second sides of the two struts 4; the two first limiting cavities 12 and the two second limiting cavities 13 are used to accommodate the protrusions 7 of the corresponding struts 4.

[0058] When the two second sides are separated, the protruding portion 7 of the support rod 4 is inserted into the corresponding first limiting cavity 12 or second limiting cavity 13 , so that the connecting portion can be connected to the pile body 1 or the seat body 14 .

[0059] When the first arc-shaped shell 6 and the second arc-shaped shell 5 are taken out from the accommodating cavity, the support rod 4 can be disconnected from the seat body 14 or the pile body 1 at the same time, thereby improving the disassembly and assembly efficiency of the buffer assembly 2 .

[0060] In some embodiments, between two adjacent buffer assemblies 2, the lower seat body 14 is movably provided with a supporting portion 11 along the vertical direction, and the buffer assembly 2 at the bottom of the pile body 1 is movably provided with a supporting portion 11, and the supporting portion 11 is used to abut between the corresponding two support rods 4 to separate the second sides of the two support rods 4.

[0061] When the abutting portion 11 moves upward in the vertical direction, the abutting portion 11 can push the strut 4 away, so that the two first sides are separated. Conversely, when the abutting portion 11 moves downward in the vertical direction, the two struts 4 can be closed together, and then the two first sides are closed together.

[0062] The contact portion 11 can be used to lock or unlock the connection portion.

[0063] The driving structure of the abutting portion 11 can be selected from existing structures and will not be described in detail here.

[0064] In some embodiments, the protective net 3 is made of elastic material.

[0065] The protective net 3 is made of elastic material, which means that the ropes used to weave the protective net 3 are made of a material with a certain degree of elasticity.

[0066] The protective net 3 is made of elastic material. After the multiple buffer components 2 are deformed, the protective net 3 will also produce elastic deformation. When the protective net 3 is reset, the elastic restoring force generated also facilitates the reset of the buffer component 2. In addition, the protective net 3 made of elastic material reduces the risk of damage under wave impact. Furthermore, under the displacement and pulling of multiple buffer structures, some holes of the protective net 3 made of elastic material can be expanded, further reducing the risk of damage to the protective net 3.

[0067] In order to ensure the protective effect on mangroves, the protective structure of the embodiment of the present application can be arranged in multiple rows and columns as needed.

[0068] On the other hand, the embodiment of the present application also provides a method for optimizing a mangrove extreme wave protection structure, comprising the following steps:

[0069] S1. Establish a gridless SPH-FEA coupled numerical model of the interaction between extreme waves and mangroves.

[0070] The specific method of establishing the numerical model is well known to those skilled in the art. In summary, firstly, the NS equations are solved based on the SPH method, and numerical wave generation is performed in combination with the Rayleigh equations to realize the computational simulation of extreme wave flow fields. At the same time, the structural force, displacement and deformation are numerically solved based on the FEA method, and the SPH model is coupled with the FEA model to establish a gridless SPH-FEA coupled numerical model of the interaction between extreme waves and mangroves that can take into account wave nonlinearity and plant flexibility.

[0071] To improve the calculation efficiency of the model, the coupled model can be accelerated by GPU.

[0072] S2, based on the numerical model, calculate and analyze the influence of wave parameters, tidal flat topography and plant parameters on the wave surface, flow velocity, pressure, vorticity, and tree force and deformation response near the mangroves.

[0073] The coupled numerical model is used to calculate the flow field, load force and deformation response of mangroves interacting with extreme waves with different wave parameters, and the influence of wave parameters on the hydrodynamic characteristics, wave load and deformation response of mangroves is analyzed.

[0074] By analyzing the interaction between extreme waves and mangroves in a variety of different tidal flat terrains, the changes in mangrove flow velocity, wave surface, vorticity and pressure field as well as the wave load and deformation response of trees are studied.

[0075] According to the mangrove layout under different plant parameter conditions, the flow velocity, wave surface, vorticity and pressure field of the mangroves as well as the wave load and deformation response of the mangroves changing with the changes of plant parameters are calculated and analyzed.

[0076] S3, simulates the interaction between extreme waves and mangroves protected by protective structures of different structural forms, sizes and arrangements.

[0077] S4. Based on the numerical model, the effects of protective structure form, size and arrangement on mangrove flow velocity, wave surface, vorticity and pressure field as well as plant wave load and deformation response are studied.

[0078] By studying the influence of protective structure forms on the hydrodynamic characteristics, load and deformation response of mangroves, the protective effects of structures such as wooden piles, geotextile-filled sandbags, hollow bricks and bamboo cages on mangroves were analyzed, and a protective structure with better protective effect and greater economy was proposed.

[0079] Analyze the influence of structural dimensions such as length, width and height of the protective structure on the hydrodynamic characteristics, wave load and deformation response of mangroves, and explore the structural layout dimensions with the optimal protective effect.

[0080] The influence of structural layout on the hydrodynamic characteristics, wave loads and deformation responses of mangroves is analyzed, and the layout conditions with better protection effects are summarized.

[0081] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A mangrove extreme wave protection structure, characterized in that: include: Protective net (3); A protective pile is arranged on both sides of the protective net (3) in the length direction, the protective pile comprises a pile body (1) and a plurality of buffer components (2), the pile body (1) is inserted into the ground, the plurality of buffer components (2) are vertically connected in sequence, the bottom buffer component (2) is connected to the top of the pile body (1), the buffer component (2) comprises a seat body (14), a movable part and a connecting part, the seat body (14) is provided with a receiving cavity, the bottom of the seat body (14) is provided with an opening communicating with the receiving cavity, the movable part is received in the receiving cavity, and the The movable part is loosely matched with the accommodating cavity, an elastic member is provided between the outer wall of the movable part and the inner wall of the accommodating cavity, the connecting part is connected to the movable part via the opening, and between two adjacent buffer components (2), the connecting part of the upper buffer component (2) is connected to the seat body (14) of the lower buffer component (2), and the connecting part of the bottom buffer component (2) is connected to the top of the pile body (1), and the side edges of the protective net (3) in the width direction are connected to each of the seat bodies (14).

2. The mangrove extreme wave protection structure according to claim 1, characterized in that: The connecting portion comprises two struts (4), the middle parts of the two struts (4) are rotatably connected, and along the length direction of the struts (4), the struts (4) comprise a first side and a second side, and the first side is arranged in the accommodating cavity via the opening, and the movable portion comprises two first arc-shaped shells (6), the concave sides of the two first arc-shaped shells (6) are arranged opposite to each other, and the concave sides of the two first arc-shaped shells (6) are respectively connected to the first sides of the two struts (4), and between two adjacent buffer components (2), the second side of the strut (4) of the upper buffer component (2) is connected to the seat (14) of the lower buffer component (2), and the second side of the strut (4) of the bottom buffer component (2) is connected to the pile body (1).

3. The mangrove extreme wave protection structure according to claim 2, characterized in that: The buffer assembly (2) corresponds to the two first arc-shaped shells (6) and further includes two second arc-shaped shells (5), the concave side of the second arc-shaped shells (5) facing the convex side of the first arc-shaped shell (6), and the elastic member connects the first arc-shaped shell (6) and the second arc-shaped shell (5).

4. The mangrove extreme wave protection structure according to claim 3, characterized in that: The side wall surface of the accommodating cavity is an arc surface that matches the second arc-shaped shell (5).

5. The mangrove extreme wave protection structure according to claim 3, characterized in that: The elastic member is a spring, and a plurality of the elastic members are provided, and the axes of the plurality of the elastic members extend along the radial direction of the first arc-shaped shell (6).

6. The mangrove extreme wave protection structure according to claim 3, characterized in that: The support rod (4) is rotatably provided with a winding roller (8), the first arc-shaped shell (6) provided on the support rod (4) is provided with a threading hole, the winding roller (8) is wound with a connecting rope (9), the connecting rope (9) is connected to the second arc-shaped shell (5) via the threading hole, the winding roller (8) is provided with a toggle portion (10), and the toggle portion (10) is configured so that when the first sides of the two support rods (4) are closed, one of the support rods (4) toggle the toggle portion (10) of the other support rod (4) so ​​that the winding roller (8) reels the connecting rope (9).

7. The mangrove extreme wave protection structure according to claim 2, characterized in that: The pile body (1) is provided with two first limiting cavities (12) at intervals, and entrances are provided on opposite sides of the two first limiting cavities (12); the seat body (14) is provided with two second limiting cavities (13) at intervals, and entrances are provided on opposite sides of the two second limiting cavities (13); and protrusions (7) are provided on opposite sides of the two second sides of the two support rods (4); the two first limiting cavities (12) and the two second limiting cavities (13) are used to accommodate the corresponding protrusions (7) of the support rods (4).

8. The mangrove extreme wave protection structure according to claim 2, characterized in that: Between two adjacent buffer assemblies (2), the lower seat body (14) is movably provided with a supporting portion (11) along the vertical direction, and the buffer assembly (2) at the bottom of the pile body (1) is movably provided with a supporting portion (11), and the supporting portion (11) is used to abut between the corresponding two support rods (4) to separate the second sides of the two support rods (4).

9. The mangrove extreme wave protection structure according to claim 1, characterized in that: The protective net (3) is made of elastic material.

10. A method for optimizing mangrove extreme wave protection structure, characterized in that: include: Establish a gridless SPH-FEA coupled numerical model of the interaction between extreme waves and mangroves; Based on the numerical model, the influence of wave parameters, tidal flat topography and plant parameters on the wave surface, flow velocity, pressure, vorticity, and tree force and deformation response near the mangroves were calculated and analyzed; Simulate the interaction between extreme waves and mangroves protected by protective structures of different structural forms, sizes and arrangements; Based on the numerical model, the influence of protective structure form, structure size and structure layout on mangrove flow velocity, wave surface, vorticity and pressure field as well as plant wave load and deformation response is studied.

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