Seawall slope ecological reconstruction structure and construction maintenance method thereof

Abstract

The application is a kind of sea embankment slope ecological reconstruction structure and its construction maintenance method, including embankment body, transverse concrete retaining wall with ladder distribution is arranged in the embankment body, combined with longitudinal concrete retaining wall, so that the embankment body forms a plurality of planting pits, the planting pit can be quickly filled with organic fertilizer soil by mixing feeding equipment, to efficiently realize the purpose of plant planting, and after filling, the whole embankment body slope is ladder type, and under the action of the retaining wall, it can effectively prevent water and soil loss and improve the survival rate of vegetation, the planting pit below the high tide line of the embankment body is closer to the sea, and it plants strong salt-tolerant plants such as sea spirogyra, bitter tree, alkali grass and thick vine, while the upper part of the embankment body is far from the sea, and the planting pit plants drought-resistant shrubs and grass (vine) plants such as single leaf vine, kikuyu grass, oleander, grey lily and narrow leaf agave, to realize the sustainable development of the sea embankment and improve the ecological function of the sea embankment.

Description

TECHNICAL FIELD

[0001] The present application is a kind of ecological reconstruction structure of sea embankment slope protection and its construction maintenance method, relating to the technical field of sea embankment construction and repair. BACKGROUND

[0002] With global climate change and sea level rise, sea embankment as an important protective facility in coastal areas is facing increasingly severe challenges. Traditional sea embankment structures often ignore ecological balance and environmental friendliness, leading to decreased biodiversity and weakened ecosystem services. Existing sea embankment slope protection structures usually have steep slopes, thin soil layers in the middle and upper parts, poor soil water retention capacity, and low soil moisture content. In addition, the lower soil is affected by seawater, resulting in high soil salinity. Under drought and salt stress conditions, the survival rate and coverage of plants are low, which cannot achieve the purpose of ecological restoration. Moreover, during the construction of sea embankment slope protection, most of them use manual soil filling, which cannot achieve rapid and effective soil loading, and the soil is easily carried away by seawater, which is not conducive to the later maintenance work. Therefore, it is necessary to provide a kind of ecological reconstruction structure of sea embankment slope protection and its construction maintenance method to improve the existing technology. SUMMARY

[0003] In view of the shortcomings of the prior art, the present application aims to provide a kind of ecological reconstruction structure of sea embankment slope protection and its construction maintenance method to solve the problems mentioned in the background.

[0004] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme: a kind of ecological reconstruction structure of sea embankment slope protection, including dam body, multiple transverse concrete retaining walls arranged and poured on the slope of dam body in ladder form, and longitudinal concrete retaining wall distributed on the slope of dam body, multiple planting pits and grooves in ladder form are formed between the longitudinal concrete retaining wall and the transverse concrete retaining wall on one side, and organic fertilizer soil is filled in the planting pit and groove, and seedlings are placed in it.

[0005] The first fertilizer water pipe is pre-buried in the inner side of the longitudinal concrete retaining wall, the second fertilizer water pipe is pre-buried in the inner side of the transverse concrete retaining wall and communicates with the first fertilizer water pipe, and multiple water outlet pipe heads are communicated on one side of the second fertilizer water pipe, each water outlet pipe head is inclined downward and communicates with the planting pit and groove.

[0006] Preferably, the planting pit and groove below the high tide line of the dam body is planted with salt-tolerant plant seedlings.

[0007] Preferably, the planting pit and groove above the high tide line of the dam body is planted with drought-resistant plant seedlings.

[0008] Further, the first fertilizer water pipe is provided with a water pump at the first end, and the water pump is externally connected to a fertilizer water source.

[0009] Further, the dam body slope top is provided with a sprinkling irrigation water system, which is composed of a spraying head, a water pipe and a water pump, and is connected with a fresh water source through the water pipe.

[0010] The application also provides a construction and maintenance method of the seawall slope ecological reconstruction structure.

[0011] S1. The mold erection and pipe laying stage: a plurality of transverse and longitudinal molds are erected on the dam body, and distribution steel bars, the first and second fertilizer pipes and the water outlet pipe head are placed in the molds, and the water outlet pipe head is connected to the second fertilizer pipe and tightly contacts with the inner side of the mold;

[0012] S2. The concrete pouring stage: the transverse and longitudinal molds are poured with concrete slurry, and the transverse setting plate is placed on the upper side of the concrete slurry, and the transverse setting plate is removed after the transverse and longitudinal concrete retaining walls are solidified to form the connected guide sliding grooves on the top of the transverse concrete retaining walls, and the planting pit grooves are formed on the outer sides of the transverse and longitudinal concrete retaining walls, and then the molds are removed;

[0013] S3. The mixture filling stage: the movable mixing and feeding equipment is placed on the top of the dam body, the planting soil and the organic fertilizer are put into the mixing and feeding equipment, the organic fertilizer soil is mixed, and the organic fertilizer soil is gradedly put into the planting pit grooves along the transverse displacement of the dam body, and the top surface of the organic fertilizer soil is simultaneously scraped to be flat, and the scraped organic fertilizer soil is leveled with the transverse concrete retaining wall to form the ladder shape;

[0014] S4. The seedling planting stage: the planting seedlings are classified, the salt-tolerant plants are planted in the planting pit grooves at the lower part of the seawall, and the drought-resistant plants are planted in the planting pit grooves at the upper part of the seawall;

[0015] S5. The maintenance stage: the sprinkling irrigation water system is arranged at the upper part of the seawall, the sprinkling irrigation water source is the calm fresh water on the inner side of the seawall, the plants are sprayed and maintained, and the first and second fertilizer pipes can inject the fertilizer water into the organic fertilizer soil in the planting pit grooves through the water outlet pipe head under the action of the water pump to maintain the soil nutrients.

[0016] In the above technical solution, the mixing and feeding equipment comprises a machine body, a mixing hopper is arranged on the upper side of the machine body, a conveying pipe is connected and arranged at the bottom of the mixing hopper, a spiral feeding rod is rotatably arranged in the conveying pipe, a conveying motor is arranged at one end of the conveying pipe to drive the spiral feeding rod, a rotating shaft sleeve is rotatably arranged at the pipe opening end of the conveying pipe, an upper feeding pipe is fixedly arranged in the rotating shaft sleeve and connected with the conveying pipe, the upper feeding pipe is movably and obliquely arranged on the inclined surface of the dam body and located on the upper side of the transverse and longitudinal concrete retaining walls, a plurality of discharge valves are arranged on the lower side of the upper feeding pipe, and each discharge valve is located above the planting pit groove.

[0017] Based on the above technical scheme, the mixing roller is installed on the inner side of the mixing hopper, the feeding pipe is provided with a plurality of sectional material valves, and each sectional material valve corresponds to the rear side of each discharge valve;

[0018] The bottom of the machine body is provided with a driving vehicle body, a plurality of second telescopic rods are installed on the upper side of the driving vehicle body, and the machine body is connected to the driving vehicle body through the second telescopic rods, the end of the feeding pipe is rotatably fixed with a stand, and the bottom of the stand is provided with a first telescopic rod, and the telescopic end of the first telescopic rod is provided with a movable roller, which is rotatably supported on the bottom of the dam body through the movable roller.

[0019] Based on the above technical scheme, the feeding pipe is provided with a plurality of material scraping assemblies on the lower side, and the material scraping assemblies are located above each planting pit, the material scraping assembly comprises two clamping hoops clamped on the upper side of the feeding pipe and two V-shaped scrapers oppositely arranged at the lower side of the clamping hoops, and the two clamping hoops are respectively provided with connecting rods on the two sides and are connected to the V-shaped scrapers through the connecting rods, and the discharge valve is located between the two V-shaped scrapers.

[0020] Based on the above technical scheme, the bottom of the V-shaped scraper is provided with a rubber scraper, and the bottom edge of the rubber scraper is at the same level as the upper side of the transverse concrete retaining wall, the lower part of the feeding pipe is fixedly provided with a plurality of movable supporting blocks capable of being fitted into the guide sliding grooves, and a plurality of rolling balls are movably embedded on the outer surface of each movable supporting block and are in rolling contact with the inner side of the guide sliding groove.

[0021] By adopting the above technical scheme, the present application has the following advantages:

[0022] 1. The dam body is provided with a transverse concrete retaining wall in a stepped distribution, and is combined with a longitudinal concrete retaining wall, so that the dam body forms a plurality of planting pits, the planting pits can be quickly filled with organic fertilizer soil through the mixing and feeding device, and the vegetation planting is efficiently realized. After filling, the slope of the entire dam body is stepped down, and under the action of the retaining wall, water and soil loss can be effectively prevented and the survival rate of vegetation can be improved;

[0023] 2. In order to further improve the survival rate of the seawall vegetation and reduce the maintenance cost, the plants planted in the planting pits are divided into two types, that is, the planting pits below the high tide line of the dam body are closer to the sea, and plants with strong salt tolerance such as sea grass, bitter wood, alkali grass and thick vine are planted, while the planting pits far from the sea in the upper part of the dam body are planted with shrubs and grass (vine) seedlings with strong drought resistance such as single leaf vine, kikuyu grass, oleander, grey lily and narrow leaf agave, so as to realize the sustainable development of the seawall, improve the ecological function and biodiversity of the seawall, enhance the protection ability of the seawall, and reduce the erosion and wave impact;

[0024] 3. And use the first water pipe, the second water pipe and the water outlet pipe head to pour the soil inside the planting pit with fertilizer water, apply nutrition while maintaining the soil moisture content, and set a sprinkler irrigation system on the dam body to spray the planted plants at regular intervals, ensuring to improve the vegetation surface humidity and further improve the long-term survival rate of the vegetation. The entire maintenance operation is very convenient and can improve work efficiency.

[0025] 4. Wherein the mixed feeding device can walk transversely along the dam body during use, the feeding pipe can not only feed organic fertilizer soil into different positions of the planting pit, but also has rotation and lifting functions, which can be adjusted according to the slope of the dam body, and the feeding pipe can be supported by the movable support block in cooperation with the guide sliding groove of the transverse concrete retaining wall and the longitudinal concrete retaining wall during soil filling. This not only improves the stability of the soil filling work of the feeding pipe, but also allows the feeding pipe to quickly displace with the driven vehicle body to improve the work efficiency of the quick feeding.

[0026] 5. Meanwhile, the V-shaped scraper can realize the function of scraping the organic fertilizer soil flat along with the transverse movement of the feeding pipe, so that the entire soil distribution is more flat and uniform, which is convenient for subsequent planting, and the excess fertilizer soil is not easy to be washed away by seawater in the later period. And because the two V-shaped scraper openings are oppositely arranged, when the feeding pipe accumulates beyond the top surface of the transverse concrete retaining wall, the V-shaped scraper can scrape the excess organic fertilizer soil to the middle, thereby avoiding the waste caused by scraping it to the upper side of the transverse concrete retaining wall. BRIEF DESCRIPTION OF DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0028] Figure 1 is a side view schematic diagram of the ecological reconstruction structure of the seawall slope of the present application;

[0029] Figure 2 is a top view structural schematic diagram of the present application Figure 1 ;

[0030] Figure 3 is a top view distribution structural schematic diagram of the first fertilizer water pipe and the second fertilizer water pipe of the present application;

[0031] Figure 4 is a side view structural schematic diagram of the mixed feeding device and the scraping assembly dam body of the present application;

[0032] Figure 5 is a side view distribution structural schematic diagram of the scraping assembly of the mixed feeding device of the present application;

[0033] Figure 6 is a front view structural schematic diagram of the mixing hopper and the feeding pipe of the present application;

[0034] Figure 7 It is the top view structural schematic drawing of the loading pipe and the scraping assembly of the application;

[0035] Figure 8 It is the side view structural schematic drawing of the V-shaped scraper of the application;

[0036] In the figure: the dam body 1, the transverse concrete retaining wall 2, the longitudinal concrete retaining wall 21, the first fertilizer and water pipe 211, the water pump 212, the planting pit groove 3, the second fertilizer and water pipe 4, the water outlet pipe head 41, the guide chute 5, the mixing and feeding equipment, the machine body 6, the mixing hopper 61, the mixing roller 611, the conveying pipe 62, the spiral feeding rod 621, the conveying motor 622, the rotating shaft sleeve 623, the rotating key 624, the loading pipe 63, the segment material valve 631, the discharge valve 632, the movable support block 633, the ball 634, the stand 635, the first telescopic rod 636, the movable roller 637, the driving vehicle body 64, the second telescopic rod 641, the scraping assembly 65, the clamp 651, the V-shaped scraper 652, the connecting rod 653, the rubber scraper 654, the sprinkling irrigation water system 7. DETAILED DESCRIPTION

[0037] In order to make the technical means, the creation features, the achieved purposes and the effects of the application easy to understand, the application is further described below in combination with the specific embodiments.

[0038] As Figures 1-8As shown in the figure, the present application provides a technical scheme of a seawall slope protection ecological reconstruction structure, which comprises a dam body 1, a plurality of transverse concrete retaining walls 2 arranged and poured on the slope of the dam body 1 in a stepped manner, and longitudinal concrete retaining walls 21 distributed longitudinally on the slope of the dam body 1. Five planting pit grooves 3 in a stepped manner are formed between one side of the longitudinal concrete retaining wall 21 and the transverse concrete retaining wall 2, and the organic fertilizer soil is filled in the planting pit groove 3 and the stress-resistant plant seedlings are placed. During planting, the seawall soil is first investigated and analyzed, the seedlings are divided into two types, and the plants with corresponding salt tolerance, waterlogging resistance and drought resistance are selected according to the soil salt content and soil moisture content at different positions after the seawall reconstruction. Specifically, the lower position of the seawall near the mean high tide line is periodically submerged in seawater all year round, the soil moisture content and salt content are high, and plants with strong salt tolerance such as Sesuvium portulacastrum, Pongamia pinnata, Suaeda and Entada phaseoloides are selected. The middle and upper positions are far from the sea, the salt content is low; and the soil layer is thin, 20-40 cm, without groundwater recharge, resulting in low soil moisture content, so strong drought-resistant shrubs and herbaceous (liana) plants such as Vitex rotundifolia, Stenotaphrum secundatum, Nerium oleander, Eupatorium fortunei and Sansevieria trifasciata should be selected. During planting, container seedlings or cuttings can be used, and the spacing of herbaceous (liana) plants should be controlled within 20cm x 20cm-40cm x 40cm, and the spacing of shrubs should be 1m x 1m, so as to realize the sustainable development of the seawall, improve the ecological function and biodiversity of the seawall, enhance the protection capacity of the seawall, and reduce the erosion and wave impact.

[0039] Furthermore, in order to facilitate maintenance and improve the survival rate of plants, a first fertilizer water pipe 211 is pre-buried in the inner side of the longitudinal concrete retaining wall 21, a second fertilizer water pipe 4 is pre-buried in the inner side of the transverse concrete retaining wall 2 and communicates with the first fertilizer water pipe 211, and a plurality of water outlet pipe heads 41 are connected to one side of the second fertilizer water pipe 4. Each water outlet pipe head 41 is inclined downward and communicates with the planting pit groove 3. A water pump 212 is installed at the first end of the first fertilizer water pipe 211, and a fertilizer water source is connected to the water pump 212. In this way, during later maintenance, the fertilizer water can be poured into the organic fertilizer soil in the planting pit groove 3 through the water pump 212, so as to improve the water content and nutrients of the soil, which is beneficial to the survival of plants and facilitates maintenance operation.

[0040] Further, a sprinkling irrigation system 7 is arranged on the top of the slope of the dam body 1. The sprinkling irrigation system 7 is composed of a spraying head, a water pipe and a water pump, and is connected to a fresh water source in the seawall through the water pipe. The spraying head is arranged in multiple and faces upward. Under the action of the water pump, the calm water on the inner side of the seawall can be sprayed onto the surface of the plants, so as to improve the survival rate of the seawall plants.

[0041] A construction and maintenance method of a seawall slope protection ecological reconstruction structure, comprising the following construction steps:

[0042] S1. The mold is placed in the pipe stage: a plurality of transverse and longitudinal templates are built on the dam body 1, and the distributed steel bars, the first and second water pipes 211 and 4 connected thereto are placed in the templates, then the second water pipe 4 is connected to the water outlet pipe head 41, and the end of the water outlet pipe head 41 is tightly pressed against the inside of the template;

[0043] S2. The concrete pouring stage: the transverse and longitudinal templates are poured with concrete slurry, and the transverse shaping plate is placed on the top side of the concrete slurry. After the transverse and longitudinal concrete retaining walls 2 and 21 are solidified, the transverse shaping plate is removed to form a connected guide chute 5 at the top, and the transverse and longitudinal concrete retaining walls 2 and 21 form planting pit grooves 3 on the outside, and then the template is removed;

[0044] S3. The mixing and filling stage: an active mixing and feeding device is placed on the top of the dam body 1. The mixing hopper 61 of the mixing and feeding device is filled with organic fertilizer and planting soil, which is mixed under the action of the mixing roller 611. Then the feeding pipe 63 can be flexibly rotated and adjusted under the action of the rotating shaft sleeve 623, so as to adapt to the slope angle of the dam body 1, and is lifted by the first and second extension rods 636 and 641 to adjust the five discharge valves 632 and the scraping assembly 65 at the bottom of the feeding pipe 63 to correspond to the five planting pit grooves 3 above, and the movable supporting block 633 is movably placed in the guide chute 5 on the top of the transverse and longitudinal concrete retaining walls 2 and 21 to ensure its stability, and also plays a left and right sliding guide role;

[0045] Then the mixed organic fertilizer soil is sent into the feeding pipe 63 by the driving screw feeder 621 of the conveying motor 622, and by controlling the opening and closing of the segment valve 631 and the discharge valve 632 at the corresponding position, the grading filling work of each planting pit groove 3 can be realized. Combined with the transverse driving displacement of the driving vehicle body 64, the ball 634 of the movable supporting block 633 can slide on the guide chute 5, and the movable roller 637 of the extension end of the first extension rod 636 can roll, so as to realize the left and right transverse displacement of the feeding pipe 63 on the slope of the dam body 1, and quickly fill the planting pit grooves 3 at different positions. After filling, the soil at the bottom can be manually compacted according to the use requirement, and then backfilled through the feeding pipe 63;

[0046] The scraping assembly 65 arranged at the same time can be synchronized with the displacement of the feeding pipe 63 to scrape the top surface of the organic fertilizer soil. Since the discharge valve 632 is located between the V-shaped scrapers 652, and the V-shaped scrapers 652 are oppositely arranged, the soil is preferentially accumulated between the V-shaped scrapers 652 when the soil is accumulated. When the feeding pipe 63 moves left and right, the organic fertilizer soil can be concentrated in the middle of the V-shaped scrapers 652 and scraped into the idle planting pit grooves 3 on the side, so as not to cause waste. The scraped organic fertilizer is leveled with the transverse concrete retaining wall 2 to form a ladder shape;

[0047] S4. Planting stage: after the filling of the planting pit 3, the required planting seedlings are divided into types, for example, the planting pit 3 at the lower part of the seawall is selected to plant salt-tolerant plants such as sea grass, bitter tree, alkali grass, and strong vine, while the planting pit 3 at the middle and upper parts of the seawall is selected to plant drought-resistant shrubs and herbaceous plants such as single-leaf vine, St. Augustine grass, oleander, lily, and agave.

[0048] S5. Maintenance stage: a sprinkler irrigation system 7 is arranged at the middle and upper parts of the seawall, and the water source of the sprinkler irrigation system 7 is the calm fresh water inside the seawall. The water is pumped by a water pump and sprayed on the surface of the plants in the planting pit 3 to maintain the plants and improve the survival rate of the plants in the seawall. The first and second fertilizer water pipes 211 and 4 can inject fertilizer water into the organic fertilizer soil in the planting pit 3 through the water outlet pipe head 41 to maintain the soil nutrients and water content under the action of the water pump 212.

[0049] In this embodiment, the mixing feeding device includes a machine body 6, a mixing hopper 61 is installed on the upper side of the machine body 6, a mixing roller 611 for mixing materials is installed inside the mixing hopper 61, a conveying pipe 62 is communicatively installed at the bottom of the mixing hopper 61, a spiral feeding rod 621 is rotatably installed inside the conveying pipe 62, a conveying motor 622 for driving the spiral feeding rod 621 is installed at one end of the conveying pipe 62, a rotating shaft sleeve 623 is rotatably installed at the pipe opening end of the conveying pipe 62, and the rotating shaft sleeve 623 is fixedly provided with a feeding pipe 63 that is in communication with the conveying pipe 62. Therefore, the conveying motor 622 can send the organic fertilizer soil into the feeding pipe 63, and the feeding pipe 63 can be adjusted in angle under the action of the rotating shaft sleeve 623, so that the feeding pipe 63 is movably arranged on the inclined surface of the dam body 1, and the feeding pipe 63 is located above the transverse concrete retaining wall 2 and the longitudinal concrete retaining wall 21. Five discharge valves 632 are installed at the lower side of the feeding pipe 63, and each discharge valve 632 is located above the planting pit 3. In this way, the organic fertilizer soil conveyed by the conveying pipe 62 and the feeding pipe 63 can be directly discharged into the planting pit 3 through the discharge valves 632.

[0050] Furthermore, the feeding pipe 63 is provided with five segment valves 631, and each segment valve 631 corresponds to the rear side of each discharge valve 632. Therefore, the corresponding segment valves 631 can be opened and closed according to the use requirements, so that the planting pits 3 at different positions can be filled with the organic fertilizer soil in a targeted manner, and the use is relatively flexible.

[0051] The machine body 6 has a drive vehicle 64 mounted on its bottom, and four second telescopic rods 641 mounted on its upper side. These second telescopic rods 641 are connected to the machine body 6 for lifting and lowering. A vertical frame 635 is rotatably fixed to the end of the feeding pipe 63. The vertical frame 635 can be rotated and adjusted in angle and then locked with screws or pins. A first telescopic rod 636 is mounted on the bottom of the vertical frame 635. The telescopic end of the first telescopic rod 636 is equipped with a movable roller 637, which provides rolling support to the bottom of the dam body 1. The first telescopic rod 636 and the second telescopic rods 641 are... Using existing technology, linearly telescopic electric push rods, hydraulic telescopic rods, or pneumatic telescopic rods and other accessories are available. Therefore, the height of the feeding tube 63 can be adjusted by the synchronous extension and retraction of the first telescopic rod 636 and the second telescopic rod 641. The feeding tube 63 can be placed on the guide groove 5 for auxiliary support and sliding guidance. Specifically, the lower part of the feeding tube 63 is fixed with five movable support blocks 633 that can be adapted to fit into the five guide grooves 5. Each movable support block 633 has multiple balls 634 movably embedded on its outer surface, and the balls 634 make rolling contact with the inner side of the guide groove 5.

[0052] A further design feature is that multiple scraping components 65 are installed on the lower side of the feeding pipe 63, and the scraping components 65 are located above each planting pit 3. Each scraping component 65 includes two clamps 651 fixed to the upper side of the feeding pipe 63 and two V-shaped scrapers 652 with opposing openings located on the lower side of the clamps 651. The structure of the clamps 651 facilitates flexible adjustment of the clamping position and facilitates subsequent disassembly and maintenance. Connecting rods 653 are installed on both sides of the two clamps 651, and are locked to the V-shaped scrapers 652 via the connecting rods 653. The discharge valve 6... 32 is located between two V-shaped scrapers 652, so that the soil discharged from the discharge valve 632 can be located between the two V-shaped scrapers 652. When the feed pipe 63 moves to the left or right, the soil can be scraped along the opening in the middle of the V-shaped scraper 652, and it is not easy to be discharged from the front and rear sides. Moreover, a rubber scraper 654 is installed at the bottom of the V-shaped scraper 652. The bottom edge of the rubber scraper 654 is at the same level as the upper side of the transverse concrete retaining wall 2. When the rubber scraper 654 comes into contact with relatively hard materials, it is not easy to cause large hard wear, which can improve its service life.

[0053] The above embodiments illustrate and describe the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A construction and maintenance method for an ecological transformation structure of a seawall revetment, characterized in that, The structure includes a dam body, multiple stepped transverse concrete retaining walls cast on the slope of the dam body, and longitudinal concrete retaining walls cast and distributed on the slope of the dam body. Multiple stepped planting pits are formed between one side of the longitudinal concrete retaining walls and the transverse concrete retaining walls. Organic fertilizer soil is filled into the planting pits and seedlings are placed in them. A first fertilizer and water pipe is pre-embedded on the inner side of the longitudinal concrete retaining walls, and a second fertilizer and water pipe connected to the first fertilizer and water pipe is pre-embedded on the inner side of the transverse concrete retaining walls. Multiple water outlets are connected to one side of the second fertilizer and water pipe, and each water outlet is inclined downward and connected to the planting pit. It also includes the following construction and maintenance steps: S1. Formwork and Pipe Laying Stage: Multiple horizontal and vertical formworks are erected on the dam body, and distributed steel bars, as well as the first and second water supply pipes connected in the formwork are placed inside the formwork. Then the second water supply pipe is connected to the outlet pipe head, and the end of the outlet pipe head is made to be in close contact with the inside of the formwork. S2. Concrete pouring stage: Pour concrete grout into the erected horizontal and vertical formwork, and place a horizontal shaping plate on the top of the concrete grout. After the horizontal and vertical concrete retaining walls have solidified, remove the horizontal shaping plate to form a connecting guide groove on its top, and form planting pits on the outside of the horizontal and vertical concrete retaining walls. Then remove the formwork. S3. Mixing and filling stage: A movable mixing and feeding device is placed on the top of the dam body. Planting soil and organic fertilizer are put into the mixing and feeding device, mixed into organic fertilizer soil, and moved laterally along the dam body to grade and put organic fertilizer soil into the planting pits at various locations. At the same time, the top surface of the organic fertilizer soil is leveled. The leveled organic fertilizer soil is level with the transverse concrete retaining wall to form a stepped shape. S4. Seedling planting stage: Differentiate the types of seedlings. Plant salt-tolerant plants in the planting pits at the lower part of the seawall, and drought-resistant plants in the planting pits at the middle and upper parts. S5. Maintenance stage: A sprinkler irrigation system is installed in the upper part of the seawall. The sprinkler water source is calm fresh water inside the seawall. The plants are sprayed and maintained. The first and second fertilizer pipes can inject fertilizer water into the organic fertilizer soil in the planting pit under the action of water pump to maintain soil nutrients. The mixing and feeding equipment includes a body, a mixing hopper is installed on the upper side of the body, and a conveying pipe is connected to the bottom of the mixing hopper. A spiral feeding rod is rotatably installed inside the conveying pipe. A conveying motor for driving the spiral feeding rod is installed at one end of the conveying pipe. A rotating bushing is rotatably installed at the pipe opening end of the conveying pipe, and a feeding pipe connected to the conveying pipe is fixedly installed on the rotating bushing. The feeding pipe is movably inclined on the inclined surface of the dam body and is located above the transverse concrete retaining wall and the longitudinal concrete retaining wall. Multiple discharge valves are installed on the lower side of the feeding pipe, and each discharge valve is located above the planting pit. Multiple scraping components are installed on the lower side of the feeding pipe, and the scraping components are located above each planting pit. The scraping components include two clamps that are tightly fixed on the upper side of the feeding pipe and two V-shaped scrapers with opposite openings located on the lower side of the clamps. Connecting rods are installed on both sides of the two clamps and are locked to the V-shaped scrapers through the connecting rods. The discharge valve is located between the two V-shaped scrapers. The bottom of the V-shaped scraper is equipped with a rubber scraper, the bottom edge of which is at the same level as the upper side of the transverse concrete retaining wall. The lower part of the feeding pipe is fixed with multiple movable support blocks that can be adapted to be placed into the guide groove, and multiple balls are movably embedded on the outer surface of each movable support block, and the balls roll into contact with the inner side of the guide groove.

2. The construction and maintenance method for an ecological transformation structure of a seawall revetment according to claim 1, characterized in that: Salt-tolerant plant seedlings are planted in planting pits below the high tide line of the dam body.

3. The construction and maintenance method for an ecological transformation structure of a seawall revetment according to claim 2, characterized in that: The planting pits above the high tide line of the dam body are planted with drought-resistant plant seedlings.

4. The construction and maintenance method for an ecological transformation structure of a seawall revetment according to claim 3, characterized in that: The first fertilizer pipe is equipped with a water pump at its head end, and the fertilizer water source is connected to the water pump.

5. The construction and maintenance method for an ecological transformation structure of a seawall revetment according to claim 4, characterized in that: A sprinkler irrigation system is installed at the top of the dam's slope. The sprinkler irrigation system consists of sprinkler heads, water pipes, and a water pump, and is connected to a fresh water source through the water pipes.

6. The construction and maintenance method for an ecological transformation structure of a seawall revetment according to claim 1, characterized in that: A mixing roller is installed inside the mixing hopper, and a plurality of segmented material valves are installed on the feeding pipe, with each segmented material valve corresponding to the rear side of each discharge valve. The machine body is equipped with a drive vehicle at the bottom, and multiple second telescopic rods are installed on the upper side of the drive vehicle. The second telescopic rods are connected to the machine body for lifting and lowering. The end of the feeding pipe is rotatably fixed with a vertical frame, and a first telescopic rod is installed at the bottom of the vertical frame. The telescopic end of the first telescopic rod is equipped with a movable roller, which provides rolling support to the bottom of the dam body.

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